/* ==========================================================================
   Gesso — site styles
   Editorial layout, printed-matter surfaces. Built on tokens.css.
   ========================================================================== */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: var(--leading-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
[hidden] { display: none !important; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--clay); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 3px;
}

/* ---------- type ---------- */
h1, h2, h3, h4, h5 {
  margin: 0;
  font-weight: 400;
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  letter-spacing: -0.012em;
  text-wrap: balance;
}

p { margin: 0 0 1em; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }

.display { font-size: var(--t-display); }
.h1 { font-size: var(--t-h1); }
.h2 { font-size: var(--t-h2); }
.h3 { font-size: var(--t-h3); font-family: var(--font-display); }
.h4 {
  font-size: var(--t-h4);
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.005em;
}

.lede {
  font-size: var(--t-lede);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: var(--measure);
}
.body-copy { color: var(--ink-2); max-width: var(--measure); }
.body-copy strong { color: var(--ink); font-weight: 600; }
.body-copy em { font-family: var(--font-display); font-style: italic; font-size: 1.08em; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-sans);
  font-size: var(--t-micro);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--ink-3);
}
.eyebrow--ink { color: var(--ink); }
.eyebrow__dot {
  width: 5px; height: 5px;
  background: var(--clay);
  border-radius: 50%;
  flex: none;
}

.serif-italic { font-family: var(--font-display); font-style: italic; }
.muted { color: var(--ink-3); }
.small { font-size: var(--t-small); }
.mono-num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* ---------- layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: 900px; }
.wrap--tight { max-width: 720px; }

.section { padding-block: var(--section-y); }
.section--flush { padding-block: 0; }
.section--tint { background: var(--paper-deep); }
.section--ink { background: var(--ink); color: var(--paper); }
.section--ink .eyebrow,
.section--ink .body-copy,
.section--ink .lede { color: rgba(247, 242, 232, 0.66); }
.section--ink .eyebrow--ink { color: var(--paper); }

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}
.rule--strong { background: var(--line-strong); }

.section__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  gap: var(--s-6) var(--s-7);
  align-items: end;
  padding-block-end: var(--s-6);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--s-7);
}
.section__head .h2 { max-width: 18ch; }
.section__head p { margin: 0; }
.section__head-aside {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  justify-self: end;
  max-width: 42ch;
}
@media (max-width: 860px) {
  .section__head {
    grid-template-columns: 1fr;
    gap: var(--s-4);
    align-items: start;
  }
  .section__head-aside { justify-self: start; }
}

.grid { display: grid; gap: var(--s-6); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1000px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}
.split--even { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 880px) {
  .split, .split--even { grid-template-columns: 1fr; }
}

/* ---------- header ---------- */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--ink);
  color: var(--paper);
  padding: var(--s-3) var(--s-4);
}
.skip:focus { left: var(--s-4); top: var(--s-4); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-2) var(--ease),
              background var(--dur-2) var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  flex: none;
}
.brand__mark {
  width: 9px; height: 9px;
  background: var(--clay);
  flex: none;
  transform: translateY(-1px) rotate(45deg);
  transition: transform var(--dur-3) var(--ease);
}
.brand:hover .brand__mark { transform: translateY(-1px) rotate(135deg); }
.brand__name {
  font-family: var(--font-display);
  font-size: 23px;
  letter-spacing: -0.015em;
  line-height: 1;
}
.brand__suffix {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.nav { display: flex; align-items: center; gap: var(--s-2); margin-left: auto; }
.nav__link {
  position: relative;
  padding: 8px 12px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-2);
  transition: color var(--dur-1) var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 2px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-2) var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--ink); }
.nav__link[aria-current="page"]::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  margin-left: var(--s-4);
  padding-left: var(--s-4);
  border-left: 1px solid var(--line);
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding-inline: 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r-1);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--dur-1) var(--ease),
              border-color var(--dur-1) var(--ease);
}
.icon-btn:hover { background: var(--paper-deep); border-color: var(--line); }
.icon-btn__count {
  min-width: 17px; height: 17px;
  display: grid; place-items: center;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-pill);
  font-size: 10px;
  font-weight: 700;
  padding-inline: 5px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--r-1);
  cursor: pointer;
  margin-left: auto;
}
.nav-toggle span {
  position: relative;
  width: 16px; height: 1px;
  background: var(--ink);
  transition: background var(--dur-1) var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute; left: 0;
  width: 16px; height: 1px;
  background: var(--ink);
  transition: transform var(--dur-2) var(--ease);
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-5px) rotate(-45deg); }

@media (max-width: 560px) {
  .brand__suffix { display: none; }
  .icon-btn__label { display: none; }
  .icon-btn { padding-inline: 9px; }
  .header-actions { gap: 0; }
}
@media (max-width: 1080px) {
  .nav { display: none; }
  .header-actions { margin-left: auto; padding-left: 0; border-left: 0; }
  .nav-toggle { display: inline-flex; margin-left: var(--s-3); }
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 99;
  background: var(--paper);
  padding: var(--s-6) var(--gutter) var(--s-8);
  overflow-y: auto;
}
.mobile-nav.is-open {
  display: block;
  animation: slide-down var(--dur-3) var(--ease) both;
}
.mobile-nav__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-4);
  padding-block: var(--s-4);
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.1;
}
.mobile-nav__link span { font-family: var(--font-sans); font-size: 12px; color: var(--ink-3); letter-spacing: var(--tracking-caps); text-transform: uppercase; }
.mobile-nav__foot { margin-top: var(--s-6); display: grid; gap: var(--s-3); }

@keyframes slide-down {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- buttons & links ---------- */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--paper);
  --btn-bd: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 12px 22px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  border-radius: var(--r-1);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.005em;
  cursor: pointer;
  transition: transform var(--dur-1) var(--ease),
              background var(--dur-2) var(--ease),
              color var(--dur-2) var(--ease),
              border-color var(--dur-2) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--solid:hover, .btn--primary:hover { --btn-bg: var(--clay); --btn-bd: var(--clay); }
.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  --btn-bd: var(--line-strong);
}
.btn--ghost:hover { --btn-bg: var(--ink); --btn-fg: var(--paper); --btn-bd: var(--ink); }
.btn--accent { --btn-bg: var(--clay); --btn-fg: #fff; --btn-bd: var(--clay); }
.btn--accent:hover { --btn-bg: var(--clay-deep); --btn-bd: var(--clay-deep); }
.btn--block { width: 100%; }
.btn--lg { min-height: 54px; padding: 15px 30px; font-size: 15.5px; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn__arrow { transition: transform var(--dur-2) var(--ease); }
.btn:hover .btn__arrow { transform: translateX(3px); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 600;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line-strong);
  transition: gap var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}
.link-arrow:hover { gap: 13px; border-color: var(--clay); }
.link-arrow--plain { border-bottom-color: transparent; }
.link-arrow--plain:hover { border-bottom-color: var(--clay); }

/* ---------- chips / filters ---------- */
.chips { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 7px 15px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-2);
  cursor: pointer;
  transition: all var(--dur-1) var(--ease);
}
.chip:hover { border-color: var(--line-strong); color: var(--ink); }
.chip[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.chip__n {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  opacity: 0.55;
}

.filter-bar {
  position: sticky;
  top: var(--header-h);
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding-block: var(--s-4);
}
.filter-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-3) var(--s-5);
}
.filter-group { display: flex; align-items: center; gap: var(--s-2); flex-wrap: wrap; }
.filter-group__label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--ink-3);
  margin-right: var(--s-1);
}
.filter-result {
  margin-left: auto;
  font-size: 13px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}
@media (max-width: 720px) {
  .filter-bar { position: static; }
  .filter-result { margin-left: 0; width: 100%; }
}

/* ---------- badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  background: var(--paper-deep);
  border-radius: var(--r-1);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.badge--clay { background: var(--clay); color: #fff; }
.badge--outline { background: transparent; border: 1px solid var(--line); }

/* ---------- hero ---------- */
.hero { position: relative; padding-top: clamp(56px, 7vw, 104px); padding-bottom: clamp(48px, 6vw, 88px); }
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: end;
}
.hero__title {
  font-size: var(--t-display);
  line-height: 0.94;
  letter-spacing: -0.03em;
  margin-block: var(--s-5) var(--s-6);
}
.hero__title em {
  font-style: italic;
  color: var(--clay);
}
.hero__aside { display: grid; gap: var(--s-5); padding-bottom: 6px; }
.hero__aside p { font-size: 15px; color: var(--ink-2); line-height: 1.55; margin: 0; }

.hero__entries {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
  margin-top: var(--s-8);
}
.entry {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: var(--s-3) var(--s-5);
  padding: var(--s-6) var(--s-6) var(--s-7) 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur-3) var(--ease);
}
.entry + .entry { padding-left: var(--s-6); border-left: 1px solid var(--line); }
.entry:hover { background: color-mix(in srgb, var(--paper-deep) 60%, transparent); }
.entry__num {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.entry__title {
  font-family: var(--font-display);
  font-size: clamp(26px, 2.6vw, 34px);
  line-height: 1.08;
  margin-block: var(--s-2) var(--s-2);
}
.entry__desc { font-size: 14.5px; color: var(--ink-2); max-width: 32ch; margin: 0; }
.entry__arrow {
  align-self: center;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: all var(--dur-2) var(--ease);
}
.entry:hover .entry__arrow {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
  transform: translateX(3px);
}
@media (max-width: 880px) {
  .hero__grid { grid-template-columns: 1fr; align-items: start; }
  .hero__entries { grid-template-columns: 1fr; }
  .entry + .entry { padding-left: 0; border-left: 0; }
}

/* ---------- course card ---------- */
.course-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-1);
  overflow: hidden;
  transition: transform var(--dur-3) var(--ease),
              box-shadow var(--dur-3) var(--ease),
              border-color var(--dur-3) var(--ease);
}
.course-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-lift);
}
.course-card__art {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--paper-deep);
}
.course-card__art svg {
  width: 100%; height: 100%;
  transition: transform var(--dur-4) var(--ease);
}
.course-card:hover .course-card__art svg { transform: scale(1.035); }
.course-card__flags {
  position: absolute;
  top: var(--s-3); left: var(--s-3);
  display: flex; gap: 6px;
  z-index: 2;
}
.course-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-5);
  flex: 1;
}
.course-card__kicker {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--ink-3);
}
.course-card__title {
  font-family: var(--font-display);
  font-size: clamp(21px, 1.7vw, 25px);
  line-height: 1.12;
}
.course-card__desc {
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-2);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.course-card__foot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3);
  margin-top: auto;
  padding-top: var(--s-4);
  border-top: 1px solid var(--line-soft);
}
.course-card__price {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: -0.01em;
}
.course-card__price small {
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--ink-3);
  font-weight: 500;
  letter-spacing: 0.04em;
}
.course-card__spec {
  font-size: 12px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

/* horizontal variant for lists */
.course-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) auto;
  gap: var(--s-5);
  align-items: center;
  padding-block: var(--s-5);
  border-bottom: 1px solid var(--line);
  transition: background var(--dur-2) var(--ease);
}
.course-row:hover { background: color-mix(in srgb, var(--paper-deep) 45%, transparent); }
.course-row__art {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--r-1);
}
.course-row__art svg { width: 100%; height: 100%; }
@media (max-width: 760px) {
  .course-row { grid-template-columns: 110px minmax(0, 1fr); }
  .course-row__end { grid-column: 1 / -1; display: flex; justify-content: space-between; padding-top: var(--s-2); }
}

/* ---------- article card ---------- */
.article-card {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding-top: var(--s-4);
  border-top: 1px solid var(--line-strong);
  transition: border-color var(--dur-2) var(--ease);
}
.article-card:hover { border-color: var(--ink); }
.article-card__kicker {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--clay);
}
.article-card__kicker span { color: var(--ink-3); font-weight: 500; }
.article-card__title {
  font-family: var(--font-display);
  font-size: clamp(22px, 2vw, 28px);
  line-height: 1.1;
}
.article-card:hover .article-card__title { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.article-card__excerpt {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0;
}
.article-card__meta {
  display: flex;
  gap: var(--s-3);
  font-size: 12px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

/* feature article (large) */
.feature {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  padding-bottom: var(--s-7);
  border-bottom: 1px solid var(--line);
}
.feature__art { aspect-ratio: 5 / 4; overflow: hidden; border-radius: var(--r-1); }
.feature__art svg { width: 100%; height: 100%; transition: transform var(--dur-4) var(--ease); }
.feature:hover .feature__art svg { transform: scale(1.03); }
.feature__title {
  font-size: clamp(30px, 3.4vw, 46px);
  line-height: 1.04;
  margin-block: var(--s-3) var(--s-4);
}
@media (max-width: 880px) { .feature { grid-template-columns: 1fr; } }

/* ---------- resource / tool card ---------- */
.resource-card {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-5);
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-1);
  transition: all var(--dur-2) var(--ease);
}
.resource-card:hover { border-color: var(--ink); box-shadow: var(--shadow-card); }
.resource-card__top { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--s-3); }
.resource-card__type {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--ink-3);
}
.resource-card__title { font-family: var(--font-display); font-size: 23px; line-height: 1.12; }
.resource-card__desc { font-size: 14px; color: var(--ink-2); margin: 0; }
.resource-card__foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-3);
  margin-top: auto; padding-top: var(--s-4);
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px; color: var(--ink-3);
}
.free-tag {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--sage);
}
.free-tag::before { content: ""; width: 5px; height: 5px; background: currentColor; border-radius: 50%; }

/* ---------- explore tiles ---------- */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}
.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--s-6);
  min-height: 168px;
  padding: var(--s-5);
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}
.tile:hover { background: var(--ink); color: var(--paper); }
.tile:hover .tile__meta { color: rgba(247, 242, 232, 0.6); }
.tile__title { font-family: var(--font-display); font-size: clamp(21px, 1.8vw, 26px); line-height: 1.1; }
.tile__meta { font-size: 12px; color: var(--ink-3); transition: color var(--dur-2) var(--ease); }
.tile__arrow { position: absolute; top: var(--s-5); right: var(--s-5); opacity: 0; transform: translate(-4px, 4px); transition: all var(--dur-2) var(--ease); }
.tile:hover .tile__arrow { opacity: 1; transform: none; }
@media (max-width: 880px) { .tile-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .tile-grid { grid-template-columns: 1fr; } }

/* ---------- product detail ---------- */
.pdp { padding-top: var(--s-5); }
.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-size: 12px; color: var(--ink-3);
  padding-block: var(--s-4);
}
.breadcrumb a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.breadcrumb__sep { opacity: 0.5; }

.pdp__top {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
  padding-block-end: var(--s-8);
}
.pdp__media { display: grid; gap: var(--s-3); position: sticky; top: calc(var(--header-h) + 24px); }
.pdp__stage {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-1);
  background: var(--paper-deep);
}
.pdp__stage svg { width: 100%; height: 100%; }
.pdp__stage-note {
  position: absolute; bottom: var(--s-3); left: var(--s-3);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  padding: 5px 10px;
  font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-2);
  border-radius: var(--r-1);
}
.pdp__thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-2); }
.pdp__thumb {
  aspect-ratio: 1 / 1;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-1);
  background: var(--paper-deep);
  cursor: pointer;
  overflow: hidden;
  transition: border-color var(--dur-1) var(--ease), opacity var(--dur-1) var(--ease);
  opacity: 0.72;
}
.pdp__thumb svg { width: 100%; height: 100%; }
.pdp__thumb:hover { opacity: 1; }
.pdp__thumb[aria-pressed="true"] { border-color: var(--ink); opacity: 1; }

.pdp__buy { display: grid; gap: var(--s-4); }
.pdp__title { font-size: clamp(34px, 4.2vw, 56px); line-height: 0.99; letter-spacing: -0.022em; }
.pdp__sub { font-size: var(--t-lede); color: var(--ink-2); line-height: 1.5; max-width: 46ch; }
.pdp__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}
.fact { padding: var(--s-3) var(--s-4); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.fact__k { font-size: 10px; font-weight: 700; letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--ink-3); }
.fact__v { font-size: 15px; font-weight: 500; margin-top: 2px; }
.price-block {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: var(--s-4); padding-block: var(--s-3);
}
.price-now { font-family: var(--font-display); font-size: clamp(38px, 4vw, 48px); line-height: 1; letter-spacing: -0.02em; }
.price-note { font-size: 12px; color: var(--ink-3); text-align: right; line-height: 1.4; }
.pdp__actions { display: grid; gap: var(--s-2); }
.pdp__assurance { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-4); font-size: 12.5px; color: var(--ink-3); }
.pdp__assurance span { display: inline-flex; align-items: center; gap: 6px; }
.pdp__assurance svg { flex: none; opacity: 0.7; }

/* the three questions */
.qa { display: grid; gap: 0; }
.qa__item {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 80px);
  padding-block: var(--s-7);
  border-bottom: 1px solid var(--line);
}
.qa__ask { display: grid; gap: var(--s-2); align-content: start; position: sticky; top: calc(var(--header-h) + 32px); height: fit-content; }
.qa__q { font-family: var(--font-display); font-size: clamp(24px, 2.4vw, 32px); line-height: 1.06; }
.qa__num { font-size: 11px; font-weight: 700; letter-spacing: var(--tracking-caps); color: var(--clay); }
.qa__body { display: grid; gap: var(--s-5); }
.qa__body > p { margin-bottom: 0; }
@media (max-width: 880px) {
  .pdp__top { grid-template-columns: 1fr; }
  .pdp__media { position: static; }
  .qa__item { grid-template-columns: 1fr; gap: var(--s-4); }
  .qa__ask { position: static; }
}

/* key–value spec table */
.kv { border-top: 1px solid var(--line); }
.kv__row {
  display: grid;
  grid-template-columns: minmax(0, 0.34fr) minmax(0, 1fr);
  gap: var(--s-4);
  padding-block: var(--s-3);
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
}
.kv__k { color: var(--ink-3); font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; padding-top: 2px; }
.kv__v { color: var(--ink); }
@media (max-width: 560px) { .kv__row { grid-template-columns: 1fr; gap: 2px; } }

/* lesson accordion */
.lessons { border-top: 0; }
.lesson { border-bottom: 1px solid var(--line); }
.lesson__btn {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto 22px;
  align-items: baseline;
  gap: var(--s-4);
  width: 100%;
  padding: var(--s-4) 0;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  transition: color var(--dur-1) var(--ease);
}
.lesson__btn:hover { color: var(--clay); }
.lesson__n { font-size: 12px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.lesson__t { font-family: var(--font-display); font-size: clamp(19px, 1.6vw, 23px); line-height: 1.2; }
.lesson__meta { font-size: 12px; color: var(--ink-3); white-space: nowrap; }
.lesson__plus {
  font-size: 18px; line-height: 1;
  color: var(--ink-3);
  justify-self: end;
  transition: transform var(--dur-2) var(--ease);
}
.lesson__btn[aria-expanded="true"] .lesson__plus { transform: rotate(45deg); }
.lesson__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-3) var(--ease);
}
.lesson__panel > div { overflow: hidden; }
.lesson__btn[aria-expanded="true"] + .lesson__panel { grid-template-rows: 1fr; }
.lesson__inner { display: grid; gap: var(--s-2); padding: 0 0 var(--s-5) 50px; max-width: 66ch; }
.lesson__inner p { font-size: 14.5px; color: var(--ink-2); margin: 0; }
.lesson__tags { display: flex; flex-wrap: wrap; gap: 6px; padding-top: var(--s-2); }
.tag {
  font-size: 11px; padding: 3px 8px;
  background: var(--paper-deep); border-radius: var(--r-1);
  color: var(--ink-2);
}

/* includes / file list */
.filelist { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.filelist li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--s-4);
  align-items: baseline;
  padding-block: var(--s-3);
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
}
.filelist__name { display: flex; align-items: baseline; gap: 10px; }
.filelist__ext {
  font-size: 9.5px; font-weight: 700; letter-spacing: 0.06em;
  padding: 2px 5px; background: var(--paper-deep); border-radius: 2px;
  color: var(--ink-2); text-transform: uppercase;
}
.filelist__size { font-size: 12px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* note / callout */
.note {
  display: grid;
  grid-template-columns: 3px 1fr;
  column-gap: var(--s-4);
  row-gap: 8px;
  padding: var(--s-4) 0;
  font-size: 14px;
  color: var(--ink-2);
}
.note::before { content: ""; background: var(--ochre); grid-column: 1; grid-row: 1 / span 20; }
.note > * { grid-column: 2; min-width: 0; }
.note--sage::before { background: var(--sage); }
.note p { margin: 0; }
.note strong { color: var(--ink); }

/* ---------- article page ---------- */
.progress {
  position: fixed; top: 0; left: 0; height: 2px;
  background: var(--clay);
  z-index: 150;
  width: 0;
  transition: width 80ms linear;
}
.article-head { padding-block: var(--s-6) var(--s-7); border-bottom: 1px solid var(--line); }
.article-head__meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-3); font-size: 12px; color: var(--ink-3); }
.article-title { font-size: clamp(34px, 5vw, 66px); line-height: 1.02; letter-spacing: -0.024em; margin-block: var(--s-4) var(--s-4); max-width: 20ch; }
.article-dek { font-size: var(--t-lede); color: var(--ink-2); max-width: 54ch; line-height: 1.5; }

.article-layout {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) 248px;
  gap: clamp(24px, 3.4vw, 56px);
  padding-block: var(--s-7) var(--s-9);
  align-items: start;
}
.toc { position: sticky; top: calc(var(--header-h) + 28px); display: grid; gap: var(--s-2); }
.toc__label { font-size: 10px; font-weight: 700; letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--ink-3); }
.toc a {
  font-size: 13px; color: var(--ink-3); line-height: 1.35;
  padding-block: 3px; border-left: 1px solid var(--line);
  padding-left: var(--s-3);
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}
.toc a:hover { color: var(--ink); border-color: var(--line-strong); }
.toc a.is-active { color: var(--ink); border-color: var(--clay); }

.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 {
  font-size: clamp(26px, 2.6vw, 34px);
  line-height: 1.08;
  margin-top: 2.1em;
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.prose h3 { font-family: var(--font-sans); font-size: 18px; font-weight: 600; margin-top: 1.9em; line-height: 1.35; }
.prose p { font-size: 17px; line-height: 1.68; color: var(--ink-2); }
.prose p strong { color: var(--ink); font-weight: 600; }
.prose a:not(.btn) { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--line-strong); }
.prose a:not(.btn):hover { color: var(--clay); text-decoration-color: var(--clay); }
.prose ul, .prose ol { padding-left: 1.25em; display: grid; gap: 0.5em; color: var(--ink-2); font-size: 16.5px; }
.prose li::marker { color: var(--clay); }
.prose blockquote {
  margin: 1.8em 0;
  padding: var(--s-5) 0 var(--s-5) var(--s-5);
  border-left: 2px solid var(--clay);
  font-family: var(--font-display);
  font-size: clamp(21px, 2.2vw, 27px);
  line-height: 1.34;
  color: var(--ink);
}
.prose blockquote p { font-family: inherit; font-size: inherit; color: inherit; line-height: inherit; margin: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin-block: 2.4em; }
.prose figure { margin: 2em 0; }
.prose figcaption { margin-top: var(--s-3); font-size: 12.5px; color: var(--ink-3); line-height: 1.5; }
.prose .pull-figure { aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--r-1); border: 1px solid var(--line); }
.prose .pull-figure svg { width: 100%; height: 100%; }
.prose .lead { font-size: 20px; color: var(--ink); line-height: 1.55; }

.article-aside { display: grid; gap: var(--s-5); position: sticky; top: calc(var(--header-h) + 28px); }
.aside-card { padding-top: var(--s-4); border-top: 1px solid var(--line-strong); display: grid; gap: var(--s-3); }
.aside-card__label { font-size: 10px; font-weight: 700; letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--ink-3); }
.aside-card p { font-size: 13.5px; line-height: 1.5; color: var(--ink-2); margin: 0; }
@media (max-width: 1080px) {
  .article-layout { grid-template-columns: 1fr; }
  .toc { display: none; }
  .article-aside { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-6); padding-top: var(--s-6); border-top: 1px solid var(--line); }
}
@media (max-width: 640px) { .article-aside { grid-template-columns: 1fr; } }

/* author / about */
.author-band {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.author-portrait {
  aspect-ratio: 1 / 1.2;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--r-1);
  overflow: hidden;
}
.author-portrait svg { width: 100%; height: 100%; }
@media (max-width: 640px) { .author-band { grid-template-columns: 84px minmax(0, 1fr); gap: var(--s-5); } }

/* ---------- newsletter ---------- */
.newsletter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  gap: clamp(24px, 4vw, 72px);
  align-items: end;
}
.field { display: grid; gap: var(--s-2); }
.field__label { font-size: 11px; font-weight: 700; letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--ink-3); }
.input-row { display: flex; gap: var(--s-2); }
.input {
  flex: 1;
  min-width: 0;
  min-height: 48px;
  padding: 12px 14px;
  background: var(--paper-card);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-1);
  font-size: 15px;
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
}
.input::placeholder { color: var(--ink-3); }
.input:hover { border-color: var(--ink-3); }
.input:focus { outline: none; border-color: var(--ink); background: #fff; }
.input[aria-invalid="true"] { border-color: var(--clay); }
.form-msg { font-size: 13px; color: var(--ink-3); min-height: 18px; }
.form-msg.is-error { color: var(--clay); }
.form-msg.is-ok { color: var(--sage); }
@media (max-width: 880px) { .newsletter { grid-template-columns: 1fr; } }

/* ---------- footer ---------- */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding-top: var(--s-9);
  margin-top: var(--s-9);
}
.site-footer a { color: rgba(247, 242, 232, 0.72); transition: color var(--dur-1) var(--ease); }
.site-footer a:hover { color: var(--paper); }
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 0.7fr));
  gap: var(--s-6) var(--s-7);
  padding-bottom: var(--s-8);
  border-bottom: 1px solid rgba(247, 242, 232, 0.16);
}
.footer-brand .brand__name { font-size: 30px; color: var(--paper); }
.footer-brand p { font-size: 14px; color: rgba(247, 242, 232, 0.6); max-width: 34ch; margin-top: var(--s-3); }
.footer-col { display: grid; gap: var(--s-2); align-content: start; }
.footer-col__label {
  font-size: 10px; font-weight: 700; letter-spacing: var(--tracking-caps);
  text-transform: uppercase; color: rgba(247, 242, 232, 0.44);
  margin-bottom: var(--s-2);
}
.footer-col a { font-size: 14px; }
.footer-bottom {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--s-4);
  padding-block: var(--s-5) var(--s-7);
  font-size: 12px;
  color: rgba(247, 242, 232, 0.44);
}
.footer-bottom__meta { display: flex; flex-wrap: wrap; gap: var(--s-4); }
@media (max-width: 880px) {
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

/* ---------- misc ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-3) var(--ease), transform var(--dur-3) var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

.empty {
  display: grid; gap: var(--s-3); place-items: center;
  padding: var(--s-9) var(--s-5);
  text-align: center;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-1);
}
.empty__title { font-family: var(--font-display); font-size: 26px; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- cart drawer ---------- */
.cart-drawer { position: fixed; inset: 0; z-index: 200; pointer-events: none; }
.cart-drawer[data-open="true"] { pointer-events: auto; }
.cart-drawer__scrim {
  position: absolute; inset: 0;
  background: rgba(23, 20, 15, 0.42);
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease);
}
.cart-drawer[data-open="true"] .cart-drawer__scrim { opacity: 1; }
.cart-drawer__panel {
  position: absolute; top: 0; right: 0; bottom: 0;
  width: min(420px, 100%);
  display: flex; flex-direction: column;
  background: var(--paper);
  border-left: 1px solid var(--line-strong);
  transform: translateX(102%);
  transition: transform var(--dur-3) var(--ease);
}
.cart-drawer[data-open="true"] .cart-drawer__panel { transform: none; }
.cart-drawer__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--s-5);
  border-bottom: 1px solid var(--line);
}
.cart-drawer__close {
  width: 34px; height: 34px;
  background: transparent; border: 1px solid var(--line);
  border-radius: var(--r-1); cursor: pointer;
  font-size: 20px; line-height: 1;
  display: grid; place-items: center;
  transition: background var(--dur-1) var(--ease);
}
.cart-drawer__close:hover { background: var(--paper-deep); }
.cart-drawer__body { flex: 1; overflow-y: auto; padding: var(--s-4) var(--s-5); }
.cart-drawer__foot { padding: var(--s-5); border-top: 1px solid var(--line); display: grid; gap: var(--s-3); }
.cart-drawer__total {
  display: flex; align-items: baseline; justify-content: space-between;
  font-size: 13px; color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.08em;
}
.cart-drawer__total span:last-child {
  font-family: var(--font-display); font-size: 26px; color: var(--ink);
  letter-spacing: -0.01em; text-transform: none;
}
.cart-line {
  display: grid; grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: var(--s-3); align-items: center;
  padding-block: var(--s-3);
  border-bottom: 1px solid var(--line-soft);
}
.cart-line__art { aspect-ratio: 1; overflow: hidden; border-radius: var(--r-1); border: 1px solid var(--line); }
.cart-line__art svg { width: 100%; height: 100%; }
.cart-line__title { font-family: var(--font-display); font-size: 17px; line-height: 1.15; margin: 0; }
.cart-line__meta { font-size: 11.5px; color: var(--ink-3); margin: 2px 0 0; }
.cart-line__end { display: flex; align-items: center; gap: 10px; }
.cart-line__x {
  background: none; border: 0; cursor: pointer;
  font-size: 18px; color: var(--ink-3); line-height: 1; padding: 4px;
}
.cart-line__x:hover { color: var(--clay); }
.cart-empty { display: grid; gap: var(--s-3); padding-block: var(--s-7); justify-items: start; }
.cart-empty p { margin: 0; }

.tagline-strip {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-3) var(--s-6);
  padding-block: var(--s-4);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
}
.tagline-strip span { display: inline-flex; align-items: center; gap: var(--s-3); }
.tagline-strip span + span::before { content: ""; width: 4px; height: 4px; background: var(--clay); border-radius: 50%; }

/* ---------- home extras ---------- */
.art-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2px;
  margin-top: var(--s-6);
  border-block: 1px solid var(--line);
  padding-block: 2px;
}
.art-strip__tile {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--paper-deep);
  display: block;
}
.art-strip__tile svg { width: 100%; height: 100%; transition: transform var(--dur-4) var(--ease); }
.art-strip__tile:hover svg { transform: scale(1.05); }
.art-strip__tile span {
  position: absolute; left: 10px; bottom: 8px;
  font-size: 10px; font-weight: 700; letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  padding: 3px 6px;
  border-radius: var(--r-1);
  opacity: 0; transform: translateY(4px);
  transition: all var(--dur-2) var(--ease);
}
.art-strip__tile:hover span { opacity: 1; transform: none; }
@media (max-width: 720px) {
  .art-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.ways {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin-bottom: var(--s-8);
}
.way {
  display: grid;
  gap: var(--s-3);
  padding: var(--s-6) var(--s-6) var(--s-6) 0;
  border-bottom: 1px solid var(--line);
}
.way + .way { padding-left: var(--s-6); border-left: 1px solid var(--line); }
.way__num { font-family: var(--font-display); font-size: 12px; letter-spacing: 0.08em; color: var(--ink-3); }
.way__title { font-family: var(--font-display); font-size: clamp(23px, 2.2vw, 29px); line-height: 1.1; }
.way p { font-size: 14.5px; color: var(--ink-2); margin: 0; max-width: 38ch; }
@media (max-width: 760px) {
  .ways { grid-template-columns: 1fr; }
  .way + .way { padding-left: 0; border-left: 0; }
}

.age-row {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: var(--s-2) var(--s-3);
  padding-top: var(--s-5);
  margin-top: var(--s-5);
  border-top: 1px solid var(--line);
}
.age-row__label { font-size: 10.5px; font-weight: 700; letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--ink-3); margin-right: var(--s-2); }

/* ---------- checkout ---------- */
.checkout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
  padding-block: var(--s-5) var(--s-9);
}
.checkout__form { display: grid; gap: var(--s-7); max-width: 620px; }
.checkout__form form { display: grid; gap: var(--s-7); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-4); }
.form-grid .field--full { grid-column: 1 / -1; }
.checkout__section { display: grid; gap: var(--s-4); }
.checkout__section-head {
  display: flex; align-items: baseline; gap: var(--s-3);
  padding-bottom: var(--s-2); border-bottom: 1px solid var(--line-strong);
}
.checkout__step { font-size: 11px; font-weight: 700; letter-spacing: var(--tracking-caps); color: var(--clay); }
.summary {
  position: sticky;
  top: calc(var(--header-h) + 28px);
  display: grid;
  gap: var(--s-4);
  padding: var(--s-5);
  background: var(--paper-card);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-1);
}
.summary__row { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-4); font-size: 14.5px; color: var(--ink-2); }
.summary__row strong { color: var(--ink); font-weight: 500; }
.summary__total {
  display: flex; align-items: baseline; justify-content: space-between;
  padding-top: var(--s-3); border-top: 1px solid var(--line);
  font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3);
}
.summary__total span:last-child { font-family: var(--font-display); font-size: 30px; color: var(--ink); letter-spacing: -0.01em; text-transform: none; }
.pay-method { display: flex; gap: var(--s-2); }
.pay-method .chip { flex: 1; justify-content: center; }
.demo-note {
  display: flex; gap: var(--s-3); align-items: flex-start;
  padding: var(--s-3) var(--s-4);
  background: var(--ochre-wash);
  border-radius: var(--r-1);
  font-size: 12.5px; line-height: 1.5; color: var(--ink-2);
}
.success {
  display: grid; gap: var(--s-4); justify-items: start;
  padding: var(--s-7) 0 var(--s-9);
}
.success__mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  border: 1px solid var(--ink); border-radius: 50%;
}
@media (max-width: 900px) {
  .checkout { grid-template-columns: 1fr; }
  .summary { position: static; }
  .form-grid { grid-template-columns: 1fr; }
}

/* ---------- library ---------- */
.lib-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) auto;
  gap: var(--s-5);
  align-items: center;
  padding-block: var(--s-5);
  border-bottom: 1px solid var(--line);
}
.lib-row__art { aspect-ratio: 4 / 3; overflow: hidden; border: 1px solid var(--line); border-radius: var(--r-1); }
.lib-row__art svg { width: 100%; height: 100%; }
.lib-row__title { font-family: var(--font-display); font-size: clamp(19px, 1.7vw, 23px); line-height: 1.15; margin: 0; }
.lib-row__meta { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-3); font-size: 12.5px; color: var(--ink-3); margin-top: 4px; }
.lib-row__actions { display: flex; gap: var(--s-2); flex-wrap: wrap; justify-content: flex-end; }
.version-pill {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 7px; border-radius: var(--r-1);
  background: var(--paper-deep); color: var(--ink-2);
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
}
@media (max-width: 760px) {
  .lib-row { grid-template-columns: 64px minmax(0, 1fr); }
  .lib-row__actions { grid-column: 1 / -1; justify-content: flex-start; }
}

/* ---------- mobile filter bar: one swipeable row per group ---------- */
@media (max-width: 720px) {
  .filter-bar__inner { gap: var(--s-2); }
  .filter-group {
    flex-wrap: nowrap;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .filter-group::-webkit-scrollbar { display: none; }
  .filter-group__label { flex: none; }
  .filter-group .chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .filter-group .chips::-webkit-scrollbar { display: none; }
  .filter-group .chip { flex: none; }
  .filter-group__label { margin-right: var(--s-1); }
  .filter-result { width: 100%; padding-top: var(--s-1); }
}

/* ==========================================================================
   中文排版重设（覆盖上面的拉丁版式）
   汉字是方块字：字距归零、行高加大、字号级差收敛、标题去大写。
   ========================================================================== */

body {
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: var(--leading-body);
  letter-spacing: 0;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0;
}

.display { font-size: var(--t-display); }
.h1 { font-size: var(--t-h1); }
.h2 { font-size: var(--t-h2); }
.h3 { font-size: var(--t-h3); font-family: var(--font-serif); }
.h4 { font-size: var(--t-h4); font-family: var(--font-sans); font-weight: 600; line-height: 1.5; }

.lede { font-size: var(--t-lede); line-height: 1.85; color: var(--ink-2); }
.body-copy { line-height: 1.9; }
.body-copy em { font-style: normal; font-family: var(--font-serif); font-weight: 600; }

.eyebrow {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--ink-3);
}

.serif-italic { font-style: normal; font-family: var(--font-serif); }

/* 标题级差：中文不适合超大字，靠字重与留白制造层级 */
.hero__title {
  font-size: var(--t-display);
  line-height: 1.18;
  letter-spacing: 0;
}
.hero__title em { font-style: normal; color: var(--clay); }

.section__head .h2 { max-width: 20ch; }

.article-title { font-size: clamp(28px, 3.6vw, 44px); line-height: 1.28; letter-spacing: 0; max-width: 24ch; }
.feature__title { font-size: clamp(24px, 2.8vw, 34px); line-height: 1.36; }
.course-card__title { font-size: clamp(19px, 1.5vw, 22px); line-height: 1.45; }
.article-card__title { font-size: clamp(19px, 1.7vw, 23px); line-height: 1.45; }
.pdp__title { font-size: clamp(28px, 3.4vw, 44px); line-height: 1.24; letter-spacing: 0; }

.prose { max-width: var(--measure); }
.prose p { font-size: var(--t-body); line-height: 1.95; }
.prose h2 { font-size: clamp(22px, 2.2vw, 28px); line-height: 1.4; }
.prose h3 { font-family: var(--font-sans); font-size: 17px; font-weight: 600; line-height: 1.6; }
.prose blockquote { font-size: clamp(18px, 2vw, 22px); line-height: 1.75; }
.prose .lead { font-size: 18px; line-height: 1.8; }

.mono-num { font-family: var(--font-num); font-variant-numeric: tabular-nums; letter-spacing: 0.01em; }

/* 中文按钮：字重与内边距略收，避免字太少显得空 */
.btn { font-family: var(--font-sans); font-weight: 500; letter-spacing: 0.02em; }
.chip { font-family: var(--font-sans); letter-spacing: 0.01em; }

.kv__k { letter-spacing: 0.06em; text-transform: none; font-size: 12px; }
.fact__k { letter-spacing: 0.06em; text-transform: none; }
.footer-col__label { letter-spacing: 0.08em; text-transform: none; }
.badge { letter-spacing: 0.04em; text-transform: none; }
.free-tag { letter-spacing: 0.02em; }
.pdp__stage-note { letter-spacing: 0.02em; text-transform: none; }

.card-soft { border-radius: var(--r-2); }

/* ==========================================================================
   积分 / 定价 / 授权 —— 这个市场特有的一组语汇
   ========================================================================== */

.points {
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--ink);
}
.points__n { font-size: 1em; letter-spacing: 0.01em; }
.points__unit { font-size: 0.62em; font-weight: 500; color: var(--ink-3); margin-left: 2px; }
.points--big { font-size: 30px; line-height: 1; }
.points--hero { font-size: clamp(34px, 3.4vw, 44px); line-height: 1; font-family: var(--font-serif); }
.points--sm { font-size: 13px; }

.price-duo { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.price-duo__yuan { font-size: 13px; color: var(--ink-3); }
.price-duo__yuan b { font-weight: 500; color: var(--ink-2); }

.seal {
  display: inline-flex; align-items: center; gap: 4px;
  height: 20px; padding-inline: 6px;
  border-radius: var(--r-1);
  font-size: 11px; font-weight: 500;
  background: var(--paper-deep); color: var(--ink-2);
  white-space: nowrap;
}
.seal--official { background: var(--ink); color: var(--paper); }
.seal--teacher { background: transparent; border: 1px solid var(--line-strong); }
.seal--download { background: var(--sage-wash); color: #3d4c40; }
.seal--useonly { background: var(--clay-wash); color: #7d3020; }
.seal--new { background: var(--ochre-wash); color: #6b4d1c; }

.license-row { display: flex; align-items: center; gap: var(--s-2); flex-wrap: wrap; }

/* 定价方式（按节 / 按单元 / 按套） */
.mode-switch { display: inline-flex; border: 1px solid var(--line-strong); border-radius: var(--r-2); overflow: hidden; }
.mode-switch button {
  padding: 8px 14px;
  background: transparent; border: 0; border-right: 1px solid var(--line);
  font-size: 13px; color: var(--ink-2); cursor: pointer;
  transition: background var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.mode-switch button:last-child { border-right: 0; }
.mode-switch button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.mode-switch button:hover:not([aria-pressed="true"]) { background: var(--paper-deep); }

/* 积分账目 */
.ledger { border-top: 1px solid var(--line); }
.ledger__row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  gap: var(--s-4);
  align-items: baseline;
  padding-block: var(--s-3);
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}
.ledger__date { color: var(--ink-3); font-size: 12.5px; font-family: var(--font-num); }
.ledger__delta { font-family: var(--font-num); font-variant-numeric: tabular-nums; font-weight: 600; }
.ledger__delta.is-in { color: var(--sage); }
.ledger__delta.is-out { color: var(--clay); }

/* 钱包卡片 */
.wallet {
  display: grid; gap: var(--s-4);
  padding: var(--s-6);
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-2);
}
.wallet__label { font-size: 12px; color: rgba(247,242,232,0.55); letter-spacing: 0.06em; }
.wallet__value { display: flex; align-items: baseline; gap: 8px; font-family: var(--font-serif); font-size: 48px; line-height: 1; }
.wallet__value small { font-family: var(--font-sans); font-size: 14px; font-weight: 400; color: rgba(247,242,232,0.6); }
.wallet__note { font-size: 12.5px; color: rgba(247,242,232,0.5); line-height: 1.7; }
.wallet__actions { display: flex; gap: var(--s-2); flex-wrap: wrap; }
.wallet .btn--ghost { --btn-bg: transparent; --btn-fg: var(--paper); --btn-bd: rgba(247,242,232,0.34); }
.wallet .btn--ghost:hover { --btn-bg: var(--paper); --btn-fg: var(--ink); --btn-bd: var(--paper); }

.recharge-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-3); }
.recharge {
  display: grid; gap: 2px; justify-items: center;
  padding: var(--s-4) var(--s-2);
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  cursor: pointer;
  transition: all var(--dur-1) var(--ease);
}
.recharge:hover { border-color: var(--line-strong); }
.recharge[aria-pressed="true"] { border-color: var(--ink); background: #fff; box-shadow: inset 0 0 0 1px var(--ink); }
.recharge__points { font-family: var(--font-num); font-size: 21px; font-weight: 600; font-variant-numeric: tabular-nums; }
.recharge__yuan { font-size: 12.5px; color: var(--ink-3); }
.recharge__bonus { font-size: 11px; color: var(--clay); margin-top: 2px; }
@media (max-width: 720px) { .recharge-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ==========================================================================
   上传向导
   ========================================================================== */
.wizard { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.wizard__steps { position: sticky; top: calc(var(--header-h) + 24px); display: grid; gap: 2px; }
.wizard__step {
  display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: var(--s-3);
  padding: var(--s-3) var(--s-3);
  border-radius: var(--r-2);
  font-size: 13.5px; color: var(--ink-3);
  background: transparent; border: 0; text-align: left; cursor: pointer;
  transition: all var(--dur-1) var(--ease);
}
.wizard__step:hover { background: var(--paper-deep); }
.wizard__step[aria-current="step"] { background: var(--paper-card); color: var(--ink); border: 1px solid var(--line); }
.wizard__step.is-done { color: var(--ink-2); }
.wizard__n {
  width: 22px; height: 22px; display: grid; place-items: center;
  border: 1px solid var(--line-strong); border-radius: 50%;
  font-size: 11px; font-family: var(--font-num);
}
.wizard__step.is-done .wizard__n { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.wizard__panel { display: grid; gap: var(--s-5); max-width: 720px; }
.wizard__foot { display: flex; gap: var(--s-2); flex-wrap: wrap; padding-top: var(--s-4); border-top: 1px solid var(--line); }
@media (max-width: 860px) {
  .wizard { grid-template-columns: 1fr; }
  .wizard__steps { position: static; grid-auto-flow: column; overflow-x: auto; gap: var(--s-2); padding-bottom: 4px; }
  .wizard__step { white-space: nowrap; }
}

.form-fieldset { display: grid; gap: var(--s-4); }
.form-fieldset + .form-fieldset { padding-top: var(--s-5); border-top: 1px solid var(--line-soft); }
.form-fieldset__title { font-family: var(--font-serif); font-size: 20px; font-weight: 600; }
.form-fieldset__hint { font-size: 13px; color: var(--ink-3); line-height: 1.7; margin: 0; }
.input, .textarea, .select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  background: var(--paper-card);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-2);
  font-size: 15px;
  font-family: var(--font-sans);
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
}
.textarea { min-height: 112px; resize: vertical; line-height: 1.75; }
.input:hover, .textarea:hover, .select:hover { border-color: var(--ink-3); }
.input:focus, .textarea:focus, .select:focus { outline: none; border-color: var(--ink); background: #fff; }
.input::placeholder, .textarea::placeholder { color: var(--ink-3); }
.field__hint { font-size: 12.5px; color: var(--ink-3); line-height: 1.6; margin: 0; }
.counter { font-size: 12px; color: var(--ink-3); font-variant-numeric: tabular-nums; text-align: right; }

.upload-drop {
  display: grid; gap: var(--s-2); justify-items: center;
  padding: var(--s-7) var(--s-5);
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-2);
  background: var(--paper-card);
  text-align: center;
  cursor: pointer;
  transition: all var(--dur-2) var(--ease);
}
.upload-drop:hover { border-color: var(--ink); background: #fff; }
.upload-drop__title { font-family: var(--font-serif); font-size: 18px; font-weight: 600; }
.upload-drop__hint { font-size: 12.5px; color: var(--ink-3); }

.file-pill {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-3);
  padding: var(--s-3) var(--s-4);
  background: var(--paper-card); border: 1px solid var(--line);
  border-radius: var(--r-2); font-size: 13.5px;
}
.file-pill__bar { height: 3px; background: var(--paper-deep); border-radius: 2px; overflow: hidden; margin-top: 6px; }
.file-pill__bar i { display: block; height: 100%; background: var(--sage); }

.estimate {
  display: grid; gap: var(--s-2);
  padding: var(--s-4);
  background: var(--ochre-wash);
  border-radius: var(--r-2);
  font-size: 13.5px; line-height: 1.7;
}
.estimate__row { display: flex; justify-content: space-between; gap: var(--s-4); }
.estimate__row b { font-family: var(--font-num); font-variant-numeric: tabular-nums; }

.license-choice { display: grid; gap: var(--s-3); }
.license-opt {
  display: grid; grid-template-columns: 18px minmax(0, 1fr); gap: var(--s-3);
  padding: var(--s-4);
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  cursor: pointer;
  transition: all var(--dur-1) var(--ease);
}
.license-opt:hover { border-color: var(--line-strong); }
.license-opt[aria-checked="true"] { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); background: #fff; }
.license-opt__title { font-weight: 600; font-size: 15px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.license-opt__desc { font-size: 13px; color: var(--ink-2); line-height: 1.7; margin-top: 4px; }
.radio-dot { width: 16px; height: 16px; border: 1px solid var(--line-strong); border-radius: 50%; margin-top: 3px; display: grid; place-items: center; }
.license-opt[aria-checked="true"] .radio-dot { border-color: var(--ink); }
.license-opt[aria-checked="true"] .radio-dot::after { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ink); }

/* ==========================================================================
   排课
   ========================================================================== */
.schedule-list { border-top: 1px solid var(--line-strong); }
.schedule-row {
  display: grid;
  grid-template-columns: 96px 92px minmax(0, 1fr) auto;
  gap: var(--s-4);
  align-items: center;
  padding-block: var(--s-4);
  border-bottom: 1px solid var(--line);
}
.schedule-row__date { font-family: var(--font-num); }
.schedule-row__day { font-size: 12px; color: var(--ink-3); }
.schedule-row__time { font-size: 19px; font-weight: 600; letter-spacing: 0.01em; }
.schedule-row__title { font-family: var(--font-serif); font-size: 18px; font-weight: 600; }
.schedule-row__meta { font-size: 12.5px; color: var(--ink-3); margin-top: 3px; }
.schedule-row--live .schedule-row__time { color: var(--clay); }
.live-dot { display: inline-flex; align-items: center; gap: 5px; font-size: 11.5px; color: var(--clay); }
.live-dot::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--clay); animation: pulse 1.8s infinite; }
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .3 } }
@media (max-width: 720px) {
  .schedule-row { grid-template-columns: 74px minmax(0, 1fr); gap: var(--s-3); }
  .schedule-row__end { grid-column: 1 / -1; }
  .schedule-row__time { font-size: 16px; }
}

/* ==========================================================================
   互动教室（授课端 / 听课端）
   ========================================================================== */
body.is-classroom { background: var(--ink); color: var(--paper); overflow: hidden; }
.classroom {
  display: grid;
  grid-template-rows: 56px minmax(0, 1fr) 64px;
  height: 100vh; height: 100dvh;
  background: var(--ink);
  color: var(--paper);
}
.classroom__bar {
  display: flex; align-items: center; gap: var(--s-4);
  padding-inline: var(--s-4);
  border-bottom: 1px solid rgba(247,242,232,0.12);
}
.classroom__title { font-family: var(--font-serif); font-size: 16px; font-weight: 600; }
.classroom__meta { font-size: 12px; color: rgba(247,242,232,0.55); }
.classroom__bar-actions { margin-left: auto; display: flex; align-items: center; gap: var(--s-2); }
.classroom__body {
  display: grid;
  grid-template-columns: 208px minmax(0, 1fr) 268px;
  min-height: 0;
}
.classroom__rail, .classroom__side {
  overflow-y: auto;
  padding: var(--s-4);
  background: rgba(247,242,232,0.03);
}
.classroom__rail { border-right: 1px solid rgba(247,242,232,0.1); }
.classroom__side { border-left: 1px solid rgba(247,242,232,0.1); display: grid; gap: var(--s-5); align-content: start; }
.classroom__stage {
  position: relative;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  min-height: 0;
  padding: var(--s-5);
  gap: var(--s-4);
}
.slide {
  position: relative;
  display: grid;
  place-items: center;
  background: var(--paper);
  border-radius: var(--r-2);
  overflow: hidden;
  box-shadow: 0 24px 60px -30px rgba(0,0,0,0.6);
}
.slide svg { width: 100%; height: 100%; }
.slide__badge {
  position: absolute; top: 12px; left: 12px;
  background: rgba(23,20,15,0.82); color: var(--paper);
  padding: 4px 9px; border-radius: var(--r-1);
  font-size: 11px; letter-spacing: 0.04em;
}
.slide__caption {
  position: absolute; bottom: 12px; left: 12px; right: 12px;
  background: rgba(23,20,15,0.82); color: var(--paper);
  padding: 8px 12px; border-radius: var(--r-1);
  font-size: 13px; line-height: 1.6;
}
.stage-tools { display: flex; align-items: center; gap: var(--s-2); flex-wrap: wrap; }
.tool-btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 36px; padding-inline: 12px;
  background: rgba(247,242,232,0.07);
  border: 1px solid rgba(247,242,232,0.16);
  border-radius: var(--r-2);
  color: var(--paper); font-size: 13px; cursor: pointer;
  transition: all var(--dur-1) var(--ease);
}
.tool-btn:hover { background: rgba(247,242,232,0.14); }
.tool-btn[aria-pressed="true"] { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.tool-btn--primary { background: var(--clay); border-color: var(--clay); }
.tool-btn--primary:hover { background: var(--clay-deep); border-color: var(--clay-deep); }
.stage-pager { margin-left: auto; display: flex; align-items: center; gap: var(--s-2); font-family: var(--font-num); font-size: 13px; color: rgba(247,242,232,0.66); }

.rail__label, .side__label {
  font-size: 11px; letter-spacing: 0.08em;
  color: rgba(247,242,232,0.45); margin-bottom: var(--s-2);
}
.rail-item {
  display: grid; grid-template-columns: 22px minmax(0,1fr); gap: 8px;
  width: 100%; padding: 8px; margin-bottom: 4px;
  background: transparent; border: 0; border-radius: var(--r-2);
  color: rgba(247,242,232,0.7); text-align: left; font-size: 12.5px; line-height: 1.5;
  cursor: pointer; transition: all var(--dur-1) var(--ease);
}
.rail-item:hover { background: rgba(247,242,232,0.08); color: var(--paper); }
.rail-item.is-current { background: rgba(247,242,232,0.14); color: var(--paper); }
.rail-item__n { font-family: var(--font-num); opacity: 0.6; }
.rail-item__state { font-size: 10.5px; color: rgba(247,242,232,0.4); }

.student {
  display: flex; align-items: center; gap: var(--s-2);
  padding: 7px 8px; border-radius: var(--r-2);
  font-size: 13px; color: rgba(247,242,232,0.8);
}
.student--hand { background: rgba(178,63,39,0.2); }
.student__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--sage); flex: none; }
.student__hand { margin-left: auto; font-size: 11px; color: var(--ochre); }
.side-stat { display: flex; justify-content: space-between; font-size: 12.5px; color: rgba(247,242,232,0.6); padding-block: 4px; }
.side-stat b { color: var(--paper); font-family: var(--font-num); }

.question-card {
  padding: var(--s-3);
  background: rgba(247,242,232,0.06);
  border: 1px solid rgba(247,242,232,0.12);
  border-radius: var(--r-2);
  display: grid; gap: 8px;
}
.question-card__q { font-size: 13px; line-height: 1.6; }
.answer-bar { display: flex; height: 6px; border-radius: 3px; overflow: hidden; gap: 2px; }
.answer-bar i { display: block; height: 100%; }
.answer-legend { display: grid; gap: 4px; font-size: 11.5px; color: rgba(247,242,232,0.6); }
.answer-legend span { display: flex; align-items: center; gap: 6px; }
.answer-legend em { width: 8px; height: 8px; border-radius: 2px; display: inline-block; }

@media (max-width: 1020px) {
  .classroom__body { grid-template-columns: minmax(0,1fr) 240px; }
  .classroom__rail { display: none; }
}
@media (max-width: 760px) {
  .classroom__body { grid-template-columns: minmax(0,1fr); }
  .classroom__side { display: none; }
  .classroom { grid-template-rows: 52px minmax(0,1fr) 60px; }
}

/* 听课端：手机界面 */
body.is-student { background: var(--paper-deep); }
.student-app {
  max-width: 420px; margin-inline: auto; min-height: 100dvh;
  display: grid; grid-template-rows: auto minmax(0,1fr) auto;
  background: var(--paper);
  box-shadow: 0 0 0 1px var(--line), 0 30px 80px -40px rgba(0,0,0,0.3);
}
.student-app__bar {
  display: flex; align-items: center; gap: var(--s-2);
  padding: var(--s-3) var(--s-4);
  border-bottom: 1px solid var(--line);
}
.student-app__title { font-family: var(--font-serif); font-size: 15px; font-weight: 600; }
.student-app__stage { padding: var(--s-4); display: grid; gap: var(--s-3); align-content: start; }
.student-app__slide { aspect-ratio: 4/3; border-radius: var(--r-2); overflow: hidden; border: 1px solid var(--line); background: var(--paper-card); }
.student-app__slide svg { width: 100%; height: 100%; }
.student-app__foot {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-2);
  padding: var(--s-4); border-top: 1px solid var(--line);
}
.vote-opt {
  padding: 12px; background: var(--paper-card); border: 1px solid var(--line-strong);
  border-radius: var(--r-2); font-size: 15px; cursor: pointer; text-align: left;
  transition: all var(--dur-1) var(--ease);
}
.vote-opt:hover { border-color: var(--ink); }
.vote-opt[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.join-card {
  display: grid; gap: var(--s-4); justify-items: center;
  padding: var(--s-8) var(--s-5);
  text-align: center;
}
.code-input {
  width: 100%; max-width: 260px;
  padding: 14px; text-align: center;
  font-family: var(--font-num); font-size: 26px; letter-spacing: 0.28em;
  background: var(--paper-card); border: 1px solid var(--line-strong); border-radius: var(--r-2);
}

/* ==========================================================================
   课件卡片 / 搜索 / 积分胶囊 / 兑换弹层
   ========================================================================== */

.cw-card {
  display: flex; flex-direction: column;
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  overflow: hidden;
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}
.cw-card:hover { transform: translateY(-2px); border-color: var(--line-strong); box-shadow: var(--shadow-lift); }
.cw-card__cover { position: relative; display: block; aspect-ratio: 4 / 3; overflow: hidden; background: var(--paper-deep); }
.cw-card__cover svg { width: 100%; height: 100%; transition: transform var(--dur-4) var(--ease); }
.cw-card:hover .cw-card__cover svg { transform: scale(1.03); }
.cw-card__seals { position: absolute; top: 10px; left: 10px; display: flex; gap: 5px; flex-wrap: wrap; }
.cw-card__owned {
  position: absolute; top: 10px; right: 10px;
  background: var(--ink); color: var(--paper);
  padding: 3px 7px; border-radius: var(--r-1);
  font-size: 11px; letter-spacing: 0.04em;
}
.cw-card__body { display: flex; flex-direction: column; gap: 8px; padding: var(--s-4); flex: 1; }
.cw-card__meta { display: flex; flex-wrap: wrap; gap: 6px; font-size: 12px; color: var(--ink-3); }
.cw-card__title { font-size: 19px; line-height: 1.45; font-weight: 600; margin: 0; }
.cw-card__title a { color: inherit; }
.cw-card__title a:hover { text-decoration: underline; text-underline-offset: 4px; }
.cw-card__desc {
  font-size: 13.5px; line-height: 1.72; color: var(--ink-2); margin: 0;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.cw-card__foot {
  display: flex; align-items: flex-end; justify-content: space-between; gap: var(--s-3);
  margin-top: auto; padding-top: var(--s-3); border-top: 1px solid var(--line-soft);
  flex-wrap: wrap;
}
.cw-card__seller { font-size: 11.5px; color: var(--ink-3); }

/* 页头搜索 */
.header-search {
  display: flex; align-items: center; gap: 6px;
  height: 34px; padding-inline: 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: var(--paper-card);
  margin-right: var(--s-2);
}
.header-search:focus-within { border-color: var(--ink); background: #fff; }
.header-search input {
  width: 150px; border: 0; background: transparent; outline: none;
  font-size: 13px; color: var(--ink);
}
.header-search input::placeholder { color: var(--ink-3); }
.header-search svg { color: var(--ink-3); flex: none; }

/* 积分胶囊 */
.points-chip {
  display: inline-flex; align-items: center; gap: 5px;
  height: 34px; padding-inline: 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--paper-card);
  transition: all var(--dur-1) var(--ease);
}
.points-chip:hover { border-color: var(--ink); }
.points-chip__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ochre); }
.points-chip__n { font-family: var(--font-num); font-size: 13.5px; font-weight: 600; font-variant-numeric: tabular-nums; }
.points-chip__unit { font-size: 11px; color: var(--ink-3); }

/* 提示条 */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 12px);
  background: var(--ink); color: var(--paper);
  padding: 11px 18px; border-radius: var(--r-2);
  font-size: 13.5px; line-height: 1.5;
  box-shadow: 0 18px 40px -18px rgba(0,0,0,0.5);
  opacity: 0; pointer-events: none;
  transition: all var(--dur-2) var(--ease);
  z-index: 300; max-width: min(90vw, 520px); text-align: center;
}
.toast[data-show="true"] { opacity: 1; transform: translate(-50%, 0); }

/* 兑换弹层 */
.sheet { position: fixed; inset: 0; z-index: 220; pointer-events: none; }
.sheet[data-open="true"] { pointer-events: auto; }
.sheet__scrim {
  position: absolute; inset: 0; background: rgba(23,20,15,0.44);
  opacity: 0; transition: opacity var(--dur-2) var(--ease);
}
.sheet[data-open="true"] .sheet__scrim { opacity: 1; }
.sheet__panel {
  position: absolute; left: 50%; top: 50%;
  width: min(460px, calc(100vw - 32px));
  transform: translate(-50%, -46%);
  opacity: 0;
  background: var(--paper);
  border-radius: var(--r-2);
  box-shadow: 0 40px 80px -40px rgba(0,0,0,0.5);
  display: grid; max-height: 88vh;
  transition: all var(--dur-2) var(--ease);
}
.sheet[data-open="true"] .sheet__panel { opacity: 1; transform: translate(-50%, -50%); }
.sheet__head { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s-4); padding: var(--s-5); border-bottom: 1px solid var(--line); }
.sheet__x { width: 28px; height: 28px; border: 1px solid var(--line); background: transparent; border-radius: var(--r-1); font-size: 18px; line-height: 1; cursor: pointer; }
.sheet__x:hover { background: var(--paper-deep); }
.sheet__body { padding: var(--s-5); display: grid; gap: 10px; overflow-y: auto; }
.sheet__row { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-4); font-size: 13.5px; color: var(--ink-2); }
.sheet__row b { color: var(--ink); font-weight: 500; text-align: right; }
.sheet__row b.is-short { color: var(--clay); }
.sheet__row--total { font-size: 15px; }
.sheet__row--total b { font-family: var(--font-num); font-size: 26px; font-weight: 600; }
.sheet__row--total small { font-size: 12px; color: var(--ink-3); font-weight: 400; }
.sheet__divider { height: 1px; background: var(--line); margin-block: 4px; }
.sheet__warn { margin: 0; font-size: 13px; color: var(--clay); line-height: 1.6; }
.sheet__note { margin: 2px 0 0; font-size: 12.5px; color: var(--ink-3); line-height: 1.7; padding-top: 8px; border-top: 1px dashed var(--line); }
.sheet__foot { padding: var(--s-4) var(--s-5) var(--s-5); display: grid; gap: var(--s-2); border-top: 1px solid var(--line); }

@media (max-width: 1080px) { .header-search { display: none; } }
@media (max-width: 560px) {
  .points-chip { padding-inline: 8px; }
  .points-chip__unit { display: none; }
  .sheet__panel { top: auto; bottom: 0; left: 0; width: 100%; transform: translateY(8px); border-radius: var(--r-2) var(--r-2) 0 0; }
  .sheet[data-open="true"] .sheet__panel { transform: none; }
}

/* ==========================================================================
   首页专用
   ========================================================================== */
.hero { padding-block: clamp(40px, 5.5vw, 76px) clamp(32px, 4vw, 56px); }
.hero__grid { grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.8fr); align-items: end; }
.hero__cta { display: flex; gap: var(--s-3); flex-wrap: wrap; margin-top: var(--s-6); }
.hero__aside { display: grid; gap: var(--s-5); padding-bottom: 4px; }
.hero__stat { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--s-4); align-items: start; padding-top: var(--s-3); border-top: 1px solid var(--line-strong); }
.hero__stat-n { font-family: var(--font-serif); font-size: 30px; font-weight: 600; line-height: 1.15; white-space: nowrap; }
.hero__stat-l { font-size: 12.5px; color: var(--ink-3); line-height: 1.7; }
@media (max-width: 880px) {
  .hero__grid { grid-template-columns: 1fr; align-items: start; }
  .hero__aside { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__aside .small { grid-column: 1 / -1; }
}
@media (max-width: 520px) { .hero__aside { grid-template-columns: 1fr; } }

.mech-strip {
  display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-4);
  margin-top: var(--s-7); padding-block: var(--s-4);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  font-size: 12.5px; color: var(--ink-2);
}
.mech-strip span { display: inline-flex; align-items: center; gap: var(--s-3); }
.mech-strip span + span::before { content: ""; width: 4px; height: 4px; background: var(--clay); border-radius: 50%; }

.tile__kicker { font-size: 11.5px; color: var(--ink-3); letter-spacing: 0.04em; }
.tile { min-height: 152px; }
.tile:hover .tile__kicker { color: rgba(247,242,232,0.55); }

/* 三步 */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-6); }
.step { display: grid; gap: var(--s-2); align-content: start; padding-top: var(--s-4); border-top: 1px solid var(--line-strong); }
.step__n { font-family: var(--font-num); font-size: 12px; color: var(--clay); letter-spacing: 0.06em; }
.step__title { font-family: var(--font-serif); font-size: 21px; font-weight: 600; }
.step__desc { font-size: 13.5px; line-height: 1.8; color: var(--ink-2); margin: 0; }
@media (max-width: 820px) { .steps { grid-template-columns: 1fr; gap: var(--s-5); } }

/* 收益算例 */
.earn-band {
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: clamp(24px, 4vw, 64px);
  margin-top: var(--s-8); padding: var(--s-6);
  background: var(--paper-card); border: 1px solid var(--line); border-radius: var(--r-2);
}
.earn-rows { display: grid; gap: 0; margin-top: var(--s-4); border-top: 1px solid var(--line); }
.earn-row { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-4); padding-block: 10px; border-bottom: 1px solid var(--line-soft); font-size: 13.5px; color: var(--ink-2); }
.earn-row b { font-family: var(--font-num); font-variant-numeric: tabular-nums; color: var(--ink); font-weight: 600; }
.earn-row--sum { border-bottom: 0; padding-top: var(--s-3); font-size: 14px; }
.earn-row--sum b { font-family: var(--font-serif); font-size: 20px; }
.earn-band__side { display: grid; gap: var(--s-3); align-content: start; }
.earn-band__side .btn { justify-self: start; }
@media (max-width: 820px) { .earn-band { grid-template-columns: 1fr; padding: var(--s-5); } }

.ink-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.ink-list li {
  position: relative; padding-left: 18px;
  font-size: 14px; line-height: 1.7; color: rgba(247,242,232,0.72);
}
.ink-list li::before { content: ""; position: absolute; left: 0; top: 10px; width: 5px; height: 5px; background: var(--ochre); border-radius: 50%; }

/* 教室演示块 */
.class-demo { background: #0f0d0b; border-radius: var(--r-2); overflow: hidden; border: 1px solid rgba(247,242,232,0.14); }
.class-demo__bar { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid rgba(247,242,232,0.12); color: rgba(247,242,232,0.72); font-size: 12px; }
.class-demo__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--sage); }
.class-demo__live { margin-left: auto; color: var(--clay); font-size: 11px; }
.class-demo__live::before { content: ""; display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--clay); margin-right: 4px; vertical-align: middle; }
.class-demo__stage { padding: 12px; display: grid; gap: 10px; }
.class-demo__slide { position: relative; aspect-ratio: 4/3; background: var(--paper); border-radius: 4px; overflow: hidden; }
.class-demo__art svg { width: 100%; height: 100%; }
.class-demo__badge { position: absolute; top: 8px; left: 8px; background: rgba(23,20,15,0.8); color: var(--paper); font-size: 10.5px; padding: 2px 6px; border-radius: 2px; }
.class-demo__cap { position: absolute; left: 8px; right: 8px; bottom: 8px; background: rgba(23,20,15,0.8); color: var(--paper); font-size: 11.5px; padding: 5px 8px; border-radius: 2px; }
.class-demo__tools { display: flex; gap: 6px; flex-wrap: wrap; color: rgba(247,242,232,0.6); font-size: 11px; }
.class-demo__tools span { padding: 3px 7px; border: 1px solid rgba(247,242,232,0.16); border-radius: 3px; }
.class-demo__tools .is-on { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.class-demo__pager { margin-left: auto; font-family: var(--font-num); }

/* 老师卡 */
.teacher-card { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: var(--s-4); align-items: center; padding: var(--s-4); border: 1px solid var(--line); border-radius: var(--r-2); background: var(--paper-card); transition: all var(--dur-2) var(--ease); }
.teacher-card:hover { border-color: var(--line-strong); transform: translateY(-2px); box-shadow: var(--shadow-card); }
.teacher-card__art { aspect-ratio: 1; border-radius: 50%; overflow: hidden; border: 1px solid var(--line); }
.teacher-card__art svg { width: 100%; height: 100%; }
.teacher-card__name { font-family: var(--font-serif); font-size: 18px; font-weight: 600; margin: 0; display: flex; align-items: center; gap: 5px; }
.teacher-card__ok { color: var(--sage); font-size: 12px; }
.teacher-card__role { font-size: 12px; color: var(--ink-3); margin: 3px 0 0; line-height: 1.5; }
.teacher-card__meta { font-size: 11.5px; color: var(--ink-2); margin: 6px 0 0; }

.rule-card { padding-top: var(--s-4); border-top: 1px solid var(--line-strong); }
.rule-card p { font-size: 13.5px; line-height: 1.8; color: var(--ink-2); margin: var(--s-2) 0 0; }

.closing {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-6); flex-wrap: wrap;
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-2);
  background: var(--paper-card);
}
.hero__stat-n { font-size: 24px; white-space: nowrap; }
.hero__stat { align-items: baseline; }

/* 深色区块里的次要按钮必须反色，否则在墨底上不可见 */
.section--ink .btn--ghost { --btn-fg: var(--paper); --btn-bd: rgba(247,242,232,0.42); }
.section--ink .btn--ghost:hover { --btn-bg: var(--paper); --btn-fg: var(--ink); --btn-bd: var(--paper); }

/* ==========================================================================
   课件详情
   ========================================================================== */
.dot-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.dot-list li {
  position: relative; padding-left: 18px;
  font-size: 14px; line-height: 1.78; color: var(--ink-2);
}
.dot-list li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--clay);
}

.license-explain {
  padding: var(--s-4);
  background: var(--paper-deep);
  border-radius: var(--r-2);
  font-size: 13px; line-height: 1.75; color: var(--ink-2);
}
.license-explain__title {
  font-weight: 600; color: var(--ink); margin: 0 0 4px;
  font-size: 13.5px;
}
.license-explain p { margin: 0; }

.lesson-pick {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; color: var(--ink-2);
  padding: 3px 8px; border: 1px solid var(--line);
  border-radius: var(--r-pill); cursor: pointer;
  white-space: nowrap;
}
.lesson-pick:hover { border-color: var(--line-strong); }
.lesson-pick input { accent-color: var(--clay); }
.lesson-pick input:disabled + span { color: var(--ink-3); }
.lessons--pick .lesson__btn { grid-template-columns: 34px minmax(0, 1fr) auto auto; }

.seller-panel, .class-panel {
  display: grid; gap: var(--s-4);
  padding: var(--s-5);
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
}
.seller-panel { grid-template-columns: 88px minmax(0, 1fr); align-items: start; }
.seller-panel__art { aspect-ratio: 1; border-radius: 50%; overflow: hidden; border: 1px solid var(--line); }
.seller-panel__art svg { width: 100%; height: 100%; }
.class-panel { align-content: start; }
.tool-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.tool-chip {
  padding: 4px 9px; border-radius: var(--r-1);
  background: var(--paper-deep); color: var(--ink-2);
  font-size: 12px;
}
@media (max-width: 640px) {
  .seller-panel { grid-template-columns: 64px minmax(0, 1fr); }
  .lessons--pick .lesson__btn { grid-template-columns: 28px minmax(0, 1fr); row-gap: 4px; }
  .lessons--pick .lesson__meta { grid-column: 2; }
  .lessons--pick .lesson-pick { grid-column: 2; justify-self: start; }
}
.lesson-pick--free { color: var(--sage); border-color: var(--sage); background: var(--sage-wash); }

/* ==========================================================================
   教室内的课件页
   ========================================================================== */
.slide__body {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  width: 100%; height: 100%;
  background: var(--paper);
}
.slide__text { padding: clamp(20px, 3vw, 44px); display: grid; align-content: center; gap: 12px; }
.slide__kicker { font-size: 12px; color: var(--ink-3); letter-spacing: 0.04em; }
.slide__h { font-family: var(--font-serif); font-size: clamp(26px, 2.6vw, 40px); font-weight: 600; line-height: 1.25; color: var(--ink); }
.slide__p { font-size: clamp(14px, 1.2vw, 17px); line-height: 1.85; color: var(--ink-2); margin: 0; max-width: 30ch; }
.slide__points { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }
.slide__tag { font-size: 11.5px; padding: 3px 8px; background: var(--paper-deep); color: var(--ink-2); border-radius: var(--r-1); }
.slide__art { overflow: hidden; }
.slide__art svg { width: 100%; height: 100%; }

.class-code {
  display: inline-flex; align-items: center; gap: 6px;
  height: 34px; padding-inline: 12px;
  border: 1px dashed rgba(247,242,232,0.3);
  border-radius: var(--r-2);
  font-size: 12px; color: rgba(247,242,232,0.66);
  cursor: pointer;
}
.class-code:hover { border-color: rgba(247,242,232,0.6); color: var(--paper); }
.class-code b { font-family: var(--font-num); font-size: 15px; letter-spacing: 0.12em; color: var(--paper); }

.rail-note { font-size: 12px; line-height: 1.75; color: rgba(247,242,232,0.55); margin: 0; }
.tool-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.tool-btn[aria-pressed="true"] { background: var(--paper); color: var(--ink); }

.board {
  position: absolute; inset: var(--s-5);
  width: calc(100% - 2 * var(--s-5));
  height: calc(100% - 2 * var(--s-5));
  background: rgba(247,242,232,0.97);
  border-radius: var(--r-2);
  cursor: crosshair;
  touch-action: none;
  z-index: 4;
}
.classroom__side .tool-btn { font-size: 12px; height: 32px; }

@media (max-width: 860px) {
  .slide__body { grid-template-columns: 1fr; }
  .slide__art { display: none; }
}

/* 听课端细节 */
.student-slide-meta {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3);
  font-size: 12px; color: var(--ink-3);
}
.student-slide-meta__n { font-family: var(--font-num); letter-spacing: 0.03em; }
.student-quiz {
  display: grid; gap: 8px;
  margin-top: var(--s-3); padding-top: var(--s-4);
  border-top: 1px solid var(--line);
}
.student-quiz__q { font-size: 14.5px; line-height: 1.65; margin: 0 0 2px; color: var(--ink); font-weight: 500; }
.student-quiz .vote-opt { width: 100%; }

/* 市场页：紧凑筛选，让商品更早出现 */
.market-head { padding-block: clamp(32px, 4vw, 56px) 0; }
.market-head .h1 { margin-bottom: var(--s-3); }
.market-filters { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-2) var(--s-7); padding-block: var(--s-4) var(--s-5); }
.market-filters .filter-group { align-items: baseline; }
.market-filters .filter-group__label { width: 56px; flex: none; }
.market-filters .chips { gap: 6px; }
.market-filters .chip { min-height: 32px; padding: 5px 12px; font-size: 13px; }
@media (max-width: 900px) {
  .market-filters { grid-template-columns: 1fr; }
  .market-filters .filter-group__label { width: auto; }
}

/* 语言切换 */
.lang-switch {
  height: 34px; min-width: 38px; padding-inline: 8px;
  background: transparent; border: 1px solid var(--line); border-radius: var(--r-pill);
  font-size: 12px; font-weight: 600; color: var(--ink-2); cursor: pointer;
  transition: all var(--dur-1) var(--ease);
}
.lang-switch:hover { border-color: var(--ink); color: var(--ink); }

/* ==========================================================================
   教室 v2：逐步动效 / 热点打点 / 片段
   ========================================================================== */
.slide__media { position: relative; overflow: hidden; }
.hotspots { position: absolute; inset: 0; pointer-events: none; }
.hotspot {
  position: absolute; transform: translate(-50%, -50%);
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px 5px 8px;
  background: rgba(23,20,15,0.86); color: var(--paper);
  border: 0; border-radius: var(--r-pill);
  font-size: 12px; cursor: pointer; pointer-events: auto;
  box-shadow: 0 6px 18px -8px rgba(0,0,0,0.6);
  transition: transform var(--dur-1) var(--ease);
}
.hotspot:hover { transform: translate(-50%, -50%) scale(1.04); }
.hotspot__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--clay); flex: none;
  animation: spot 2s infinite;
}
@keyframes spot { 0%,100% { box-shadow: 0 0 0 0 rgba(178,63,39,0.55) } 60% { box-shadow: 0 0 0 8px rgba(178,63,39,0) } }
.hotspot__tip {
  position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%);
  max-width: 300px; padding: 10px 12px;
  background: var(--paper); color: var(--ink);
  border-radius: var(--r-2); font-size: 12.5px; line-height: 1.7;
  box-shadow: 0 14px 30px -14px rgba(0,0,0,0.5);
  pointer-events: none; z-index: 3;
}

.slide-steps { display: grid; gap: 10px; align-content: start; }
.st {
  opacity: 0; transform: translateY(8px);
  transition: opacity var(--dur-3) var(--ease), transform var(--dur-3) var(--ease);
  font-size: clamp(14px, 1.15vw, 17px); line-height: 1.85; color: var(--ink-2); margin: 0;
}
.st.is-in { opacity: 1; transform: none; }
.st--list { margin: 0; padding-left: 1.1em; display: grid; gap: 6px; color: var(--ink-2); }
.st--list li::marker { color: var(--clay); }
.st--quote {
  font-family: var(--font-serif); font-size: clamp(17px, 1.5vw, 22px);
  line-height: 1.5; color: var(--ink);
  padding-left: 12px; border-left: 2px solid var(--clay);
}
.st--tag {
  justify-self: start; font-size: 12px; padding: 3px 9px;
  background: var(--paper-deep); border-radius: var(--r-1); color: var(--ink-2);
}

/* 片段播放 */
.clip {
  position: absolute; left: 14px; right: 14px; bottom: 14px;
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px;
  background: rgba(23,20,15,0.84); border-radius: var(--r-2);
  color: var(--paper); font-size: 12px;
}
.clip__play {
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--paper); color: var(--ink); border: 0; cursor: pointer; flex: none;
}
.clip__label { flex: none; }
.clip__bar { flex: 1; height: 3px; background: rgba(247,242,232,0.25); border-radius: 2px; overflow: hidden; }
.clip__bar i { display: block; height: 100%; width: 0%; background: var(--ochre); transition: width 90ms linear; }
.slide__art.is-playing svg { animation: clipPan 6s ease-in-out both; }
@keyframes clipPan {
  0% { transform: scale(1) translateY(0); }
  50% { transform: scale(1.08) translateY(-2%); }
  100% { transform: scale(1.02) translateY(1%); }
}

/* 白板按钮态与步进按钮禁用 */
.tool-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ==========================================================================
   V3 · 上传查重 / 电子版权证书 / 验真（upload, certificate, verify）
   只复用 tokens.css 里已有的颜色与字体；类名以 dedup / fp / cert / verify 开头，
   不覆盖其他页面的既有规则。打印样式放在本段末尾。
   ========================================================================== */

/* --- 上传第 3 步：查重 --- */
.dedup {
  display: grid; gap: var(--s-3);
  padding: var(--s-4);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: var(--paper-card);
}
.dedup__status {
  margin: 0; font-family: var(--font-num); font-size: 12.5px;
  letter-spacing: 0.02em; color: var(--ink-3); font-variant-numeric: tabular-nums;
}
.dedup__verdict {
  display: grid; gap: 4px;
  padding: var(--s-3) var(--s-4);
  border-left: 3px solid var(--line-strong);
  background: var(--paper-deep);
}
.dedup__verdict.is-ok { border-left-color: var(--sage); background: var(--sage-wash); }
.dedup__verdict.is-warn { border-left-color: var(--ochre); background: var(--ochre-wash); }
.dedup__verdict.is-bad { border-left-color: var(--clay); background: var(--clay-wash); }
.dedup__verdict-label {
  margin: 0; font-family: var(--font-serif); font-size: 18px; font-weight: 600; letter-spacing: 0.02em;
}
.dedup__verdict-detail { margin: 0; font-size: 13.5px; line-height: 1.75; color: var(--ink-2); }
.dedup__list { display: grid; gap: var(--s-3); margin: 0; padding: 0; list-style: none; }
.dedup__list:empty { display: none; }
.dedup__hit {
  display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: var(--s-3);
  align-items: start; padding-top: var(--s-3); border-top: 1px solid var(--line-soft);
}
.dedup__rank { padding-top: 3px; font-size: 12px; color: var(--ink-3); }
.dedup__body { display: grid; gap: 6px; min-width: 0; }
.dedup__row { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); }
.dedup__title {
  font-size: 14.5px; color: var(--ink); text-decoration: none;
  border-bottom: 1px solid transparent; transition: border-color var(--dur-1) var(--ease);
}
.dedup__title:hover { border-bottom-color: var(--ink); }
.dedup__pct { flex: none; font-size: 15px; font-weight: 600; font-variant-numeric: tabular-nums; }
.dedup__bar { height: 3px; background: var(--paper-deep); border-radius: 2px; overflow: hidden; }
.dedup__bar i { display: block; height: 100%; background: var(--sage); }
.dedup__bar i.is-warn { background: var(--ochre); }
.dedup__bar i.is-bad { background: var(--clay); }
.dedup__fields {
  display: flex; flex-wrap: wrap; gap: 2px 12px;
  font-family: var(--font-num); font-size: 11.5px; color: var(--ink-3);
}
.dedup__fields:empty { display: none; }
.dedup__foot { margin: 0; }
.dedup__foot:empty { display: none; }

/* --- 上传第 2/3 步：文件指纹 --- */
.upload-drop.is-over { border-color: var(--ink); background: var(--paper-card); }
.fp-list { display: grid; gap: var(--s-2); }
.fp-row {
  padding: var(--s-3);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: var(--paper-card);
}
.fp-row__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: var(--s-3); font-size: 13px;
}
.fp-row__head b { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fp-row__head span { flex: none; }
.fp-hash { margin: 3px 0 0; font-size: 11.5px; line-height: 1.65; word-break: break-all; color: var(--ink-3); }
.fp-flag { margin: 4px 0 0; font-size: 12px; line-height: 1.6; }
.fp-flag.is-warn { color: var(--ochre); }

/* --- 上传第 6 步：提交前预览 --- */
.submit-preview { display: grid; border-top: 1px solid var(--line-strong); }
.submit-preview__row {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-4);
  padding: 9px 0; border-bottom: 1px solid var(--line-soft); font-size: 13.5px;
}
.submit-preview__row > span { flex: none; color: var(--ink-3); }
.submit-preview__row > b { font-weight: 600; text-align: right; word-break: break-all; }

/* --- 证书页 --- */
.cert-page__head { padding-bottom: var(--s-3); }
.cert-actions { display: flex; flex-wrap: wrap; gap: var(--s-2); margin-bottom: var(--s-5); }
.cert-sheet {
  position: relative;
  padding: clamp(24px, 4vw, 56px);
  background: var(--paper-card);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-lift);
}
.cert-sheet::after {
  content: ""; position: absolute; inset: 10px;
  border: 1px solid var(--line); pointer-events: none;
}
.cert-sheet__head { display: flex; align-items: center; justify-content: space-between; gap: var(--s-4); }
.cert-sheet__brand {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-serif); font-size: 17px; font-weight: 600; letter-spacing: 0.04em;
}
.cert-sheet__meta {
  display: flex; align-items: center; gap: var(--s-3);
  font-size: 12px; color: var(--ink-3);
}
.cert-sheet__title { padding: clamp(24px, 4vw, 48px) 0 clamp(16px, 3vw, 30px); text-align: center; }
.cert-sheet__kicker {
  margin: 0 0 8px; font-size: 11.5px; letter-spacing: 0.24em; color: var(--ink-3);
}
.cert-sheet__h {
  margin: 0; font-family: var(--font-serif);
  font-size: clamp(26px, 3.4vw, 38px); font-weight: 600; letter-spacing: 0.06em;
}
.cert-fields {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--s-7); margin: 0;
  border-top: 1px solid var(--line-strong);
}
.cert-field {
  display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: var(--s-3);
  align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--line-soft);
}
.cert-field dt { font-size: 12px; color: var(--ink-3); }
.cert-field dd { margin: 0; font-size: 13.5px; line-height: 1.6; word-break: break-word; }
.cert-fp-block {
  margin-top: var(--s-5); padding: var(--s-4);
  background: var(--paper-deep); border: 1px solid var(--line);
}
.cert-fp-label { margin: 0; font-size: 12px; color: var(--ink-3); }
.cert-fp {
  margin: 6px 0 0;
  font-family: var(--font-num); font-variant-numeric: tabular-nums;
  font-size: clamp(18px, 2.4vw, 24px); letter-spacing: 0.12em;
}
.cert-fp-note { margin: 8px 0 0; font-size: 12px; line-height: 1.7; color: var(--ink-2); }
.cert-fp-full { margin: 4px 0 0; word-break: break-all; }
.cert-badge {
  display: inline-flex; align-items: center;
  padding: 3px 9px; border: 1px solid currentColor; border-radius: var(--r-pill);
  font-size: 11.5px; letter-spacing: 0.04em;
}
.cert-badge--valid { color: var(--sage); }
.cert-badge--pending { color: var(--ochre); }
.cert-pending {
  display: grid; gap: var(--s-2); justify-items: start;
  margin-top: var(--s-5); padding: var(--s-4);
  border: 1px solid var(--ochre); background: var(--ochre-wash);
}
.cert-pending__title { margin: 0; font-family: var(--font-serif); font-size: 17px; font-weight: 600; }
.cert-pending__desc { margin: 0; font-size: 13px; line-height: 1.75; color: var(--ink-2); }
.cert-sheet__foot {
  display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between;
  gap: var(--s-5); margin-top: var(--s-5); padding-top: var(--s-4);
  border-top: 1px solid var(--line-strong);
}
.cert-verifyHow-title { margin: 0 0 4px; font-size: 12px; color: var(--ink-3); }
.cert-verifyHow-text { margin: 0; max-width: 52ch; font-size: 12.5px; line-height: 1.75; color: var(--ink-2); }
.cert-sheet__sign { margin: 0; }
.cert-work-link { margin-top: var(--s-2); }
.cert-note { margin-top: var(--s-4); max-width: 72ch; }
.cert-missing { margin-top: var(--s-5); }
.cert-lookup { display: flex; flex-wrap: wrap; gap: var(--s-2); margin: var(--s-4) 0 var(--s-3); }
.cert-lookup .input { max-width: 260px; }
.cert-demo { margin-top: var(--s-2); }

/* --- 验真页 --- */
.verify-head { padding-bottom: var(--s-5); }
.verify-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-6); align-items: start;
}
.verify-panel {
  display: grid; gap: var(--s-3); align-content: start;
  padding: var(--s-5); border: 1px solid var(--line); background: var(--paper-card);
}
.verify-panel__head { display: flex; align-items: baseline; gap: var(--s-3); }
.verify-panel__n { font-size: 12px; letter-spacing: 0.12em; color: var(--ink-3); }
.verify-panel__head .h4 { margin: 0; }
.verify-form { display: grid; gap: var(--s-2); }
.verify-form__row { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.verify-form__row .input { flex: 1 1 180px; min-width: 0; }
.verify-form__row .btn { flex: none; }
.verify-fieldset { display: grid; gap: var(--s-2); margin: 0; padding: 0; border: 0; }
.verify-fieldset:disabled { opacity: 0.55; }
.verify-fill { margin: 0; }
.verify-demo { display: grid; gap: 6px; margin-top: var(--s-2); }
.verify-cert {
  display: grid; gap: var(--s-3);
  padding: var(--s-4); border: 1px solid var(--line-strong); background: var(--paper);
}
.verify-cert__head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); }
.verify-cert__rows { display: grid; margin: 0; }
.verify-cert__rows > div {
  display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: var(--s-3);
  padding: 6px 0; border-top: 1px solid var(--line-soft);
}
.verify-cert__rows dt { font-size: 11.5px; color: var(--ink-3); }
.verify-cert__rows dd { margin: 0; font-size: 13px; line-height: 1.6; word-break: break-word; }
.verify-result { display: grid; gap: var(--s-3); padding: var(--s-4); border-left: 3px solid var(--line-strong); background: var(--paper-deep); }
.verify-result.is-match { border-left-color: var(--sage); background: var(--sage-wash); }
.verify-result.is-mismatch { border-left-color: var(--clay); background: var(--clay-wash); }
.verify-result__verdict {
  margin: 0; font-family: var(--font-serif); font-size: 22px; font-weight: 600; letter-spacing: 0.04em;
}
.verify-result.is-match .verify-result__verdict { color: var(--sage); }
.verify-result.is-mismatch .verify-result__verdict { color: var(--clay); }
.verify-result__desc { margin: 0; font-size: 13px; line-height: 1.75; color: var(--ink-2); }
.verify-pairs { display: grid; margin: 0; }
.verify-pairs > div {
  display: grid; grid-template-columns: 128px minmax(0, 1fr); gap: var(--s-3);
  padding: 6px 0; border-top: 1px solid var(--line-soft);
}
.verify-pairs dt { font-size: 11.5px; color: var(--ink-3); }
.verify-pairs dd { margin: 0; font-size: 13px; line-height: 1.6; word-break: break-word; }
.verify-pending { margin: 0; padding-top: var(--s-2); border-top: 1px solid var(--line-soft); color: var(--ink-2); }
.verify-hintbox { display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: baseline; }
.verify-note {
  margin-top: var(--s-6); padding-top: var(--s-4);
  max-width: 76ch; border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .verify-grid { grid-template-columns: 1fr; }
  .cert-fields { grid-template-columns: 1fr; }
  .cert-field { grid-template-columns: 88px minmax(0, 1fr); }
}

@media (max-width: 560px) {
  .verify-form__row .btn { width: 100%; }
  .cert-lookup .input { max-width: none; }
}

/* --- 打印：证书页 --- */
@media print {
  .site-header, .site-footer, .mobile-nav, .skip, .lang-switch,
  .cert-actions, .cert-page__head, .cert-note, [data-toast] { display: none !important; }
  html, body { background: #fff; }
  #main { padding: 0; }
  .cert-page { padding: 0; }
  .cert-sheet {
    border-color: #000; box-shadow: none;
    padding: 16mm 14mm; page-break-inside: avoid;
  }
  .cert-sheet::after { border-color: #000; }
  .cert-fields { border-top-color: #000; }
  .cert-field, .cert-sheet__foot { border-color: #000; }
  .cert-fp-block { background: transparent; border-color: #000; }
  .cert-badge { border-color: #000; color: #000; }
  .cert-pending { background: transparent; border-color: #000; }
  .cert-pending .btn { display: none !important; }
  .cert-work-link { display: none !important; }
  @page { size: A4; margin: 12mm; }
}

/* ==========================================================================
   教师工作台（workbench.html）：指标条 / 待办 / 柱状图 / 课件三态 / 学生与班级
   只复用 tokens.css 里的颜色与字体，不新增色值。类名以 wb- 开头，不覆盖既有规则。
   ========================================================================== */
.wb-kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-3); }
.wb-kpi {
  display: grid; gap: 4px;
  padding: var(--s-4) var(--s-5);
  background: var(--paper-card); border: 1px solid var(--line); border-radius: var(--r-2);
  transition: border-color var(--dur-1) var(--ease);
}
.wb-kpi:hover { border-color: var(--line-strong); }
.wb-kpi__label { font-size: 11.5px; letter-spacing: 0.04em; color: var(--ink-3); }
.wb-kpi__n { font-family: var(--font-serif); font-size: clamp(26px, 2.4vw, 34px); line-height: 1.1; font-variant-numeric: tabular-nums; }
.wb-kpi__n small { margin-left: 5px; font-family: var(--font-sans); font-size: 12.5px; font-weight: 400; color: var(--ink-3); }
.wb-kpi__note { font-size: 11.5px; line-height: 1.55; color: var(--ink-3); }
@media (max-width: 900px) { .wb-kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .wb-kpis { grid-template-columns: 1fr; } }

.wb-tasks { border-top: 1px solid var(--line-strong); }
.wb-task {
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto;
  gap: var(--s-4); align-items: center;
  padding-block: var(--s-4);
  border-bottom: 1px solid var(--line);
}
.wb-task__title { margin: 0; font-size: 15px; line-height: 1.5; color: var(--ink); }
.wb-task__detail { margin: 3px 0 0; font-size: 12.5px; line-height: 1.65; color: var(--ink-3); }
@media (max-width: 720px) {
  .wb-task { grid-template-columns: 1fr; gap: var(--s-2); }
}

.wb-chart { padding: var(--s-5); background: var(--paper-card); border: 1px solid var(--line); border-radius: var(--r-2); }
.wb-chart svg { display: block; width: 100%; height: auto; }
.wb-chart__total { margin: 0 0 var(--s-3); font-family: var(--font-num); font-variant-numeric: tabular-nums; font-size: 13px; color: var(--ink-3); }
.wb-chart__total b { font-family: var(--font-serif); font-size: 19px; font-weight: 600; color: var(--ink); }
.wb-chart__note { margin: var(--s-2) 0 0; font-size: 12px; line-height: 1.7; color: var(--ink-3); }
.wb-chart__axis { fill: var(--ink-3); font-size: 11px; }
.wb-chart__grid { stroke: var(--line-soft); stroke-width: 1; }
.wb-chart__bar { fill: var(--clay); }
.wb-chart__bar--past { fill-opacity: 0.62; }
.wb-chart__zero { fill: var(--line-strong); }
.wb-chart__value { fill: var(--ink-2); font-size: 11px; font-variant-numeric: tabular-nums; }
.wb-chart__date { fill: var(--ink-3); font-size: 11px; font-variant-numeric: tabular-nums; }
.wb-chart__sub { fill: var(--ink-3); font-size: 11px; }
.wb-chart__sub--today { fill: var(--clay); }

.wb-group + .wb-group { margin-top: var(--s-6); }
.wb-group__head {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); flex-wrap: wrap;
  padding-bottom: var(--s-2); border-bottom: 1px solid var(--line-strong);
}
.wb-empty {
  margin-top: var(--s-2); padding: var(--s-4);
  border: 1px dashed var(--line-strong); border-radius: var(--r-2);
  font-size: 13px; line-height: 1.7; color: var(--ink-3);
}

.wb-students { display: grid; gap: var(--s-6); }
.wb-class { display: grid; gap: 2px; }
.wb-class__head {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); flex-wrap: wrap;
  padding-bottom: var(--s-2); border-bottom: 1px solid var(--line-strong);
}
.wb-class__name { margin: 0; font-family: var(--font-serif); font-size: 20px; font-weight: 600; }
.wb-student {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) 92px 76px minmax(0, 1.6fr);
  gap: var(--s-3); align-items: baseline;
  padding-block: 9px; border-bottom: 1px solid var(--line-soft);
  font-size: 13.5px;
}
.wb-student--head { padding-block: 6px; font-size: 11px; letter-spacing: 0.04em; color: var(--ink-3); }
.wb-student__n { font-weight: 600; }
.wb-student__note { font-size: 12.5px; line-height: 1.6; color: var(--ink-3); }
@media (max-width: 720px) {
  .wb-student { grid-template-columns: minmax(0, 1fr) 72px; }
  .wb-student--head { display: none; }
  .wb-student__note { grid-column: 1 / -1; }
}

.wb-actions { display: flex; gap: var(--s-2); flex-wrap: wrap; margin-top: var(--s-5); }

/* ==========================================================================
   登录 / 注册（login.html / register.html）：当前会话条
   ========================================================================== */
.auth-session {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); flex-wrap: wrap;
  padding: var(--s-3) var(--s-4);
  background: var(--paper-card); border: 1px solid var(--line); border-radius: var(--r-2);
  font-size: 13px; line-height: 1.7;
}

/* 演示账号卡片：.tile 原本只给链接用，放进 <button> 要抹掉浏览器默认边框 */
.auth-demo-grid .tile {
  width: 100%; border: 0;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0; background: transparent; text-align: left;
}

/* 工作台：驳回原因 */
.lib-row__reason {
  margin: 6px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--clay);
  max-width: 56ch;
}

/* ==========================================================================
   导入课件（转换管线）
   ========================================================================== */
.imp-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(24px, 4vw, 56px); padding-bottom: var(--s-9); align-items: start; }
.imp-left { display: grid; gap: var(--s-4); position: sticky; top: calc(var(--header-h) + 24px); }
.imp-drop { display: grid; gap: 10px; justify-items: center; padding: var(--s-8) var(--s-5); cursor: pointer; }
.imp-drop.is-over { border-color: var(--ink); background: #fff; }
.imp-sample { display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap; }
.imp-phase { display: grid; gap: 8px; }
.imp-phase__row { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--ink-3); }
.imp-phase__row b { color: var(--ink); font-family: var(--font-num); }
.imp-bar { height: 4px; background: var(--paper-deep); border-radius: 2px; overflow: hidden; }
.imp-bar i { display: block; height: 100%; width: 0; background: var(--sage); transition: width 180ms var(--ease); }
.imp-error { padding: var(--s-3) var(--s-4); background: var(--clay-wash); color: #7d3020; border-radius: var(--r-2); font-size: 13px; line-height: 1.7; }

.imp-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line); margin-bottom: var(--s-6); }
.imp-stat { padding: var(--s-3) var(--s-4); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: grid; gap: 2px; }
.imp-stat--hash { grid-column: 1 / -1; display: flex; align-items: baseline; gap: var(--s-3); }
.imp-stat__k { font-size: 11.5px; color: var(--ink-3); letter-spacing: 0.03em; }
.imp-stat__v { font-family: var(--font-num); font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; }
.imp-stat--hash .imp-stat__v { font-size: 12.5px; font-weight: 400; color: var(--ink-2); letter-spacing: 0.04em; }
.imp-stat__n { font-size: 11px; color: var(--ink-3); }

.imp-block { margin-bottom: var(--s-6); }
.imp-slides { border-top: 1px solid var(--line); }
.imp-slide { display: grid; grid-template-columns: 36px minmax(0, 1fr) auto 16px; gap: var(--s-3); align-items: baseline; padding-block: 9px; border-bottom: 1px solid var(--line-soft); }
.imp-slide__n { font-family: var(--font-num); font-size: 12px; color: var(--ink-3); }
.imp-slide__title { font-family: var(--font-serif); font-size: 15.5px; font-weight: 600; }
.imp-slide__meta { font-size: 12px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.imp-slide__warn { width: 16px; height: 16px; display: grid; place-items: center; border-radius: 50%; background: var(--ochre-wash); color: #6b4d1c; font-size: 11px; font-weight: 700; cursor: help; }

.warn-list { margin: 0; padding-left: 1.1em; display: grid; gap: 6px; font-size: 13px; line-height: 1.7; color: var(--ink-2); }
.warn-list li::marker { color: var(--ochre); }

.imp-actions { display: flex; gap: var(--s-2); flex-wrap: wrap; padding-top: var(--s-4); border-top: 1px solid var(--line); }

@media (max-width: 900px) {
  .imp-grid { grid-template-columns: 1fr; }
  .imp-left { position: static; }
  .imp-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* 导入课件的动效：按 p:timing 映射过来的出现方式 */
.st--anim-fade.is-in { animation: stFade var(--dur-3) var(--ease) both; }
.st--anim-move.is-in { animation: stMove var(--dur-3) var(--ease) both; }
.st--anim-zoom.is-in { animation: stZoom var(--dur-3) var(--ease) both; }
.st--anim-wipe.is-in { animation: stWipe var(--dur-3) var(--ease) both; }
.st--anim-appear.is-in { animation: none; }
@keyframes stFade { from { opacity: 0 } to { opacity: 1 } }
@keyframes stMove { from { opacity: 0; transform: translateX(-16px) } to { opacity: 1; transform: none } }
@keyframes stZoom { from { opacity: 0; transform: scale(0.94) } to { opacity: 1; transform: none } }
@keyframes stWipe { from { clip-path: inset(0 100% 0 0) } to { clip-path: inset(0 0 0 0) } }

.imp-tl { font-style: normal; color: var(--ink-2); letter-spacing: 0.01em; }

/* 导入课件的原版式画布 */
.slide-canvas {
  position: absolute; inset: 0;
  margin: auto;
  max-width: 100%; max-height: 100%;
  width: 100%;
  background: #fff;
  border-radius: var(--r-2);
  overflow: hidden;
}
.slide-canvas__item {
  position: absolute;
  display: flex; align-items: center;
  opacity: 0;
  transition: opacity var(--dur-3) var(--ease), transform var(--dur-3) var(--ease);
}
.slide-canvas__item.is-in { opacity: 1; }
.slide-canvas__item.ca--move.is-in { animation: stMove var(--dur-3) var(--ease) both; }
.slide-canvas__item.ca--zoom.is-in { animation: stZoom var(--dur-3) var(--ease) both; }
.slide-canvas__item.ca--wipe.is-in { animation: stWipe var(--dur-3) var(--ease) both; }
.slide-canvas__item img, .slide-canvas__item video { width: 100%; height: 100%; object-fit: contain; }
.slide-canvas__item--text { align-items: flex-start; }
.slide-canvas__text {
  width: 100%;
  white-space: pre-wrap;
  line-height: 1.4;
  color: #17140f;
  font-family: var(--font-sans);
  font-size: clamp(11px, 2.1vh, 22px);
  letter-spacing: 0;
}
.slide-canvas__miss {
  display: grid; place-items: center; width: 100%; height: 100%;
  background: repeating-linear-gradient(45deg, var(--paper), var(--paper) 8px, var(--paper-deep) 8px, var(--paper-deep) 16px);
  font-size: 12px; color: var(--ink-3);
}

/* ==========================================================================
   V4 · Office 加载项任务窗格（office-addin.html）
   窄窗专用布局：只复用 token 里的颜色与字体，类名统一 oa- 前缀。
   ========================================================================== */
.oa-body { background: var(--paper); }
.oa {
  display: grid; gap: 10px;
  max-width: 460px; margin: 0 auto; padding: 14px 14px 22px;
  font-size: 13px; line-height: 1.65;
}
.oa-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.oa-brand {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-serif); font-size: 16px; font-weight: 600; letter-spacing: 0.02em;
}
.oa-note {
  margin: 0; padding: 8px 10px;
  border-left: 2px solid var(--ochre); background: var(--ochre-wash);
  font-size: 12px; line-height: 1.65; color: var(--ink-2);
}
.oa-card { display: grid; border: 1px solid var(--line); background: var(--paper-card); }
.oa-row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  padding: 7px 10px; border-bottom: 1px solid var(--line-soft);
}
.oa-row:last-child { border-bottom: 0; }
.oa-row > span { flex: none; color: var(--ink-3); font-size: 12px; }
.oa-row > b {
  min-width: 0; font-weight: 600; text-align: right;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.oa-dot {
  display: inline-block; width: 7px; height: 7px; margin-right: 6px;
  border-radius: 50%; background: var(--ink-3); vertical-align: 1px;
}
.oa-dot.is-on { background: var(--sage); }
.oa-dot.is-warn { background: var(--ochre); }
.oa-dot.is-off { background: var(--clay); }
.oa-controls { display: grid; grid-template-columns: 1fr 1.4fr 1fr; gap: 6px; }
.oa-controls .btn { min-height: 42px; padding-inline: 6px; font-size: 12.5px; justify-content: center; }
.oa-jump { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.oa-jump .oa-label { flex: 1 1 100%; }
.oa-jump .input { flex: 0 0 96px; min-height: 38px; }
.oa-jump .btn { flex: 1 1 auto; }
.oa-label { font-size: 11.5px; letter-spacing: 0.03em; color: var(--ink-3); }
.oa-pad { padding: 8px 10px; }
.oa-pad .btn { width: 100%; justify-content: center; }
.oa-links { display: flex; flex-wrap: wrap; gap: 12px; }
.oa-log { display: grid; gap: 3px; margin: 0; padding: 0; list-style: none; }
.oa-log li {
  display: flex; gap: 8px;
  font-family: var(--font-num); font-size: 11.5px; color: var(--ink-3);
}
.oa-log li b { color: var(--ink-2); font-weight: 600; }
.oa-log li.is-empty { font-family: var(--font-sans); }
.oa-foot {
  padding-top: 10px; border-top: 1px solid var(--line);
  font-size: 11.5px; line-height: 1.7; color: var(--ink-3);
}
.oa-foot p { margin: 0 0 6px; }
.oa-foot p:last-child { margin-bottom: 0; }
@media (max-width: 340px) {
  .oa-controls { grid-template-columns: 1fr 1fr; }
  .oa-controls .btn:first-child { grid-column: 1 / -1; }
}

/* 同步通道状态 */
.relay-status {
  display: inline-flex; align-items: center; gap: 5px;
  height: 26px; padding-inline: 9px;
  border-radius: var(--r-pill);
  font-size: 11px; letter-spacing: 0.03em;
  background: var(--paper-deep); color: var(--ink-2);
}
.relay-status[data-relay="on"] { background: var(--sage-wash); color: #3d4c40; }
.relay-status::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; opacity: .7; }
.student-app__bar .relay-status { margin-left: auto; height: 22px; font-size: 10.5px; }

/* ==========================================================================
   灵感墙（瀑布）
   ========================================================================== */
.wall-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--s-5); padding-block: clamp(28px, 4vw, 52px) var(--s-5); }
.wall-count { display: flex; align-items: baseline; gap: 6px; white-space: nowrap; }
.wall-count b { font-family: var(--font-num); font-size: 34px; font-weight: 600; letter-spacing: -0.02em; }
.wall-count span { font-size: 12px; color: var(--ink-3); }

.wall-tools { display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap; padding-bottom: var(--s-4); border-bottom: 1px solid var(--line); }
.wall-search { display: flex; align-items: center; gap: 8px; height: 38px; padding-inline: 12px; background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); color: var(--ink-3); min-width: 240px; flex: 1 1 240px; max-width: 340px; }
.wall-search input { border: 0; outline: none; background: none; font: inherit; color: var(--ink); width: 100%; }
.wall-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.wall-filters select { height: 38px; padding-inline: 10px 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); font: inherit; font-size: 13px; color: var(--ink); appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23807966' fill='none' stroke-width='1.2'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; }
.wall-view { display: flex; gap: 2px; margin-left: auto; }

.wall { padding-block: var(--s-5) var(--s-7); }
.wall.is-grid { columns: 4 240px; column-gap: var(--s-4); }
.wall.is-list { display: grid; gap: var(--s-3); columns: auto; }
.wall-card { break-inside: avoid; margin-bottom: var(--s-4); background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); overflow: hidden; }
.wall.is-list .wall-card { display: grid; grid-template-columns: 132px minmax(0, 1fr); margin: 0; }
.wall-card__art { display: block; position: relative; overflow: hidden; background: var(--paper-deep); }
.wall.is-list .wall-card__art { aspect-ratio: auto !important; height: 100%; min-height: 96px; }
.wall-card__art svg { width: 100%; height: 100%; display: block; }
.wall-card__peek { position: absolute; inset: auto 8px 8px 8px; text-align: center; padding: 6px 0; font-size: 11.5px; letter-spacing: .04em; color: #fff; background: rgba(23,20,15,.72); border-radius: var(--r-1); opacity: 0; transform: translateY(4px); transition: opacity .18s var(--ease), transform .18s var(--ease); }
.wall-card__art:hover .wall-card__peek, .wall-card__art:focus-visible .wall-card__peek { opacity: 1; transform: none; }
.wall-card__body { padding: 10px 12px 12px; }
.wall-card__title { font-family: var(--font-serif); font-size: 15px; font-weight: 600; margin: 0 0 3px; line-height: 1.35; }
.wall-card__title a { color: inherit; }
.wall-card__meta { margin: 0; font-size: 11.5px; color: var(--ink-3); letter-spacing: .02em; }
.wall-card__foot { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: 12px; }
.wall-card__price { font-family: var(--font-num); font-weight: 600; font-variant-numeric: tabular-nums; }
.wall-card__price small { font-weight: 400; color: var(--ink-3); font-size: 10.5px; }
.wall-card__seller { color: var(--ink-3); text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 2px; margin-left: auto; max-width: 9ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.wall-card__save { width: 26px; height: 26px; display: grid; place-items: center; border: 0; background: none; color: var(--ink-3); cursor: pointer; padding: 0; border-radius: 50%; }
.wall-card__save:hover { background: var(--paper-deep); }
.wall-card__save.is-on { color: var(--clay); }

.wall-pager { display: flex; align-items: center; gap: 6px; padding-bottom: var(--s-7); }
.pager__btn { min-width: 30px; height: 30px; border: 1px solid var(--line); background: #fff; border-radius: var(--r-1); font: inherit; font-size: 12.5px; cursor: pointer; }
.pager__btn.is-on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.pager__hint { margin-left: 6px; font-size: 12px; color: var(--ink-3); }

@media (max-width: 900px) {
  .wall.is-grid { columns: 2 160px; }
  .wall-head { flex-direction: column; align-items: flex-start; gap: var(--s-3); }
  .wall-view { margin-left: 0; }
}

/* 灵感墙：收藏筛选 chip */
.chip-btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 38px; padding-inline: 12px;
  border: 1px solid var(--line); background: #fff; border-radius: var(--r-2);
  font: inherit; font-size: 13px; color: var(--ink-2); cursor: pointer;
}
.chip-btn.is-on { border-color: var(--clay); color: var(--clay); background: var(--clay-wash); }

/* 首页：灵感墙入口 */
.wall-teaser { border-top: 1px solid var(--line); }
.wall-teaser__head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--s-5); flex-wrap: wrap; margin-bottom: var(--s-5); }
.wall-teaser__row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-3); }
.wall-mini { display: grid; gap: 6px; text-decoration: none; color: inherit; }
.wall-mini__art { display: block; aspect-ratio: 4 / 3; overflow: hidden; border-radius: var(--r-2); background: var(--paper-deep); }
.wall-mini__art svg { width: 100%; height: 100%; display: block; }
.wall-mini__title { font-family: var(--font-serif); font-size: 14.5px; font-weight: 600; }
.wall-mini__meta { font-size: 11.5px; color: var(--ink-3); }
@media (max-width: 760px) {
  .wall-teaser__row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ==========================================================================
   页头修正：导航不折行（中文按字断行会让整排竖着排）
   ========================================================================== */
.site-header__inner { min-width: 0; }
.nav { flex-shrink: 0; gap: 2px; }
.nav__link { white-space: nowrap; padding: 8px 10px; font-size: 14px; }
.header-actions { flex-shrink: 0; }
.icon-btn__label { white-space: nowrap; }
.header-search { flex: 0 1 200px; min-width: 0; }

@media (max-width: 1440px) {
  .nav__link { padding: 8px 8px; font-size: 13.5px; }
  .header-search { display: none; }
}
@media (max-width: 1180px) {
  .nav { gap: 0; }
  .nav__link { padding: 8px 7px; font-size: 13px; }
}

/* 墙上已经有主搜索框，页头那个重复的藏掉 */
body[data-page="wall"] .header-search { display: none; }

/* 灵感墙：搜索单行放大，筛选第二行 */
.wall-tools { display: grid; gap: var(--s-3); align-items: stretch; }
.wall-search--wide { max-width: 680px; width: 100%; height: 46px; flex: none; }
.wall-search--wide input { font-size: 15px; }
.wall-tools__row { display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap; }
.wall-tools__row .wall-view { margin-left: auto; }

/* 灵感墙首屏收紧 */
.wall-head { align-items: flex-start; padding-block: clamp(24px, 3vw, 40px) var(--s-4); }
.wall-count { display: inline-flex; align-items: baseline; gap: 6px; margin: 0; padding: 6px 12px; border: 1px solid var(--line); border-radius: var(--r-pill); background: #fff; white-space: nowrap; }
.wall-count b { font-family: var(--font-num); font-size: 16px; font-weight: 600; }
.wall-count span { font-size: 12px; color: var(--ink-3); }

/* 灵感墙：标题与计数同一行；宽屏加密一列 */
.wall-title { display: flex; align-items: baseline; gap: var(--s-3); flex-wrap: wrap; }
.wall-title .wall-count { transform: translateY(-6px); }
@media (min-width: 1500px) {
  .wall.is-grid { columns: 5 210px; }
}
.wall-card__art { border-bottom: 1px solid var(--line-soft); }

/* 墙上的视图切换：教室里的 .tool-btn 是深色工具条样式，直接复用会变成白字白底 */
.wall-view .tool-btn {
  color: var(--ink-2);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-1);
  height: 38px;
  padding-inline: 12px;
  font-size: 13px;
  cursor: pointer;
}
.wall-view .tool-btn + .tool-btn { margin-left: -1px; }
.wall-view .tool-btn.is-on { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ==========================================================================
   灵感墙：全宽自适应（不再套居中容器）
   ========================================================================== */
body[data-page="wall"] .wrap {
  max-width: none;
  padding-inline: clamp(14px, 2vw, 34px);
}

/* 列数交给浏览器按窗口宽度算，不再写死 4/5 列 */
.wall.is-grid { columns: 220px; column-gap: 14px; }
@media (max-width: 760px) { .wall.is-grid { columns: 158px; column-gap: 10px; } }

/* 筛选条吸顶，滚动时仍能改条件 */
.wall-tools {
  position: sticky;
  top: 0;
  z-index: 6;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  padding-block: 10px;
  border-bottom: 1px solid var(--line);
}

/* ==========================================================================
   灵感墙：图优先（花瓣式）
   ========================================================================== */
body[data-page="wall"] .site-header { transition: transform var(--dur-3) var(--ease), border-color var(--dur-2) var(--ease); }
body[data-page="wall"] .site-header.is-hidden { transform: translateY(-100%); }

/* 卡片去掉白底与边框，图满铺，文字直接排在纸色上 */
.wall-card {
  background: none;
  border: 0;
  border-radius: 0;
  overflow: visible;
  margin-bottom: var(--s-5);
}
.wall-card__art {
  border-radius: 10px;
  border: 0;
  overflow: hidden;
  background: var(--paper-deep);
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);
}
.wall-card:hover .wall-card__art { transform: translateY(-2px); box-shadow: 0 8px 24px -12px rgba(23, 20, 15, .22); }
.wall-card__body { padding: 9px 2px 0; }
.wall-card__title { font-size: 14.5px; margin-bottom: 2px; }
.wall-card__meta { font-size: 11px; }
.wall-card__foot { margin-top: 5px; }
.wall-card__seller { color: var(--ink-2); }
.wall-card__save { width: 24px; height: 24px; }
.wall-card__save:hover { background: var(--paper-deep); }

.wall.is-list .wall-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  overflow: hidden;
  padding: 0;
}
.wall.is-list .wall-card__body { padding: 10px 12px 12px; }
.wall.is-list .wall-card__art { border-radius: 0; }

/* 首屏居中 */
body[data-page="wall"] .wall-head { flex-direction: column; align-items: center; text-align: center; padding-block: clamp(28px, 4vw, 54px) var(--s-4); }
body[data-page="wall"] .wall-title { justify-content: center; }
body[data-page="wall"] .wall-lede { margin-inline: auto; }
body[data-page="wall"] .wall-search--wide { margin-inline: auto; }
body[data-page="wall"] .wall-tools { border-bottom: 0; }
body[data-page="wall"] .wall-filters { justify-content: center; margin-inline: auto; }
body[data-page="wall"] .wall-tools__row { justify-content: center; }
body[data-page="wall"] .wall-tools__row .wall-view { margin-left: 0; }

/* 积分胶囊不能被挤成两行 */
.points-chip { white-space: nowrap; flex: none; }
.points-chip b, .points-chip small { white-space: nowrap; }

/* 工具条收在搜索框这一列的宽度里，避免横跨全屏显得散 */
body[data-page="wall"] .wall-tools {
  max-width: 1080px;
  margin-inline: auto;
  width: 100%;
  padding-inline: 0;
}
body[data-page="wall"] .wall-filters { margin-inline: 0; justify-content: center; }
body[data-page="wall"] .wall-tools__row { justify-content: center; gap: 10px; }
body[data-page="wall"] .wall-tools__row .chip-btn { margin-left: 6px; }
body[data-page="wall"] .wall-tools__row .wall-view { margin-left: 6px; }

/* 视图切换：钉在工具栏右端，和筛选分开 */
body[data-page="wall"] .wall-tools__row { position: relative; }
body[data-page="wall"] .wall-view {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  margin: 0;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}
@media (max-width: 1100px) {
  body[data-page="wall"] .wall-view { position: static; transform: none; border-left: 0; padding-left: 0; margin-left: 6px; }
  body[data-page="wall"] .wall-tools__row { flex-wrap: wrap; }
}

/* 老师主页的作品墙 */
.wall--teacher { columns: 240px; column-gap: 16px; max-width: 1120px; }
.wall--teacher .wall-card { margin-bottom: var(--s-4); }

/* ==========================================================================
   上传：自定义标签
   ========================================================================== */
.tag-input {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  min-height: 46px; padding: 6px 8px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-2);
}
.tag-input:focus-within { border-color: var(--ink-2); }
.tag-input__list { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.tag-input__field {
  flex: 1 1 180px; min-width: 140px;
  border: 0; background: none; outline: none; height: 32px;
  font: inherit; font-size: 14px; color: var(--ink);
}
.tag-chip {
  display: inline-flex; align-items: center; gap: 4px;
  height: 28px; padding-inline: 10px 6px;
  background: var(--paper-deep); border-radius: var(--r-pill);
  font-size: 12.5px; color: var(--ink-2); white-space: nowrap;
}
.tag-chip button {
  width: 18px; height: 18px; border: 0; background: none; cursor: pointer;
  color: var(--ink-3); font-size: 14px; line-height: 1; padding: 0; border-radius: 50%;
}
.tag-chip button:hover { background: rgba(23,20,15,.08); color: var(--ink); }
.tag-chip--ghost { background: #fff; border: 1px dashed var(--line-strong); color: var(--ink-3); cursor: pointer; padding-inline: 10px; }
.tag-chip--ghost:hover { border-color: var(--ink-2); color: var(--ink); }
.tag-input__meta { display: flex; justify-content: space-between; margin-top: 6px; font-size: 12px; color: var(--ink-3); }
.tag-input__meta b { font-family: var(--font-num); color: var(--ink); }
.tag-suggest { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 10px; }
.tag-suggest__label { font-size: 11.5px; color: var(--ink-3); margin-right: 2px; }

/* 灵感墙：标签 */
.wall-card__tags { display: flex; gap: 4px; margin: 0 0 4px; flex-wrap: wrap; }
.wall-card__tags span {
  font-size: 10.5px; padding: 1px 7px; border-radius: var(--r-pill);
  background: var(--paper-deep); color: var(--ink-3); letter-spacing: .02em;
}
.wall-tagbar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; padding: 10px 0 2px; }
.wall-tagbar__label { font-size: 11.5px; color: var(--ink-3); margin-right: 4px; }
.wall-tagbar .tag-chip--ghost { height: 28px; font-size: 12px; }
.wall-tagbar .tag-chip.is-on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.tag-chip__n { margin-left: 5px; font-size: 10px; opacity: .6; }

/* 标签条与上方工具栏同宽居中 */
body[data-page="wall"] .wall-tagbar {
  max-width: 1080px;
  margin-inline: auto;
  justify-content: center;
  padding-bottom: 6px;
}

/* ==========================================================================
   收银台（现金支付原型）
   ========================================================================== */
.pay-shell { padding-block: var(--s-8) var(--s-9); display: grid; gap: var(--s-4); }
.pay-amount { display: flex; align-items: baseline; gap: 10px; padding: var(--s-4) 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pay-amount span { font-size: 12.5px; color: var(--ink-3); }
.pay-amount b { font-family: var(--font-num); font-size: 34px; font-weight: 600; letter-spacing: -0.02em; }
.pay-channels { display: flex; gap: 8px; flex-wrap: wrap; }
.pay-channel { height: 40px; padding-inline: 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); font: inherit; font-size: 13.5px; color: var(--ink-2); cursor: pointer; }
.pay-channel.is-on { border-color: var(--ink); color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.pay-qr { display: grid; gap: var(--s-3); justify-items: center; padding: var(--s-5) 0; }
.pay-qr__code {
  --cells: 21;
  display: grid;
  grid-template-columns: repeat(var(--cells), 1fr);
  width: 180px; height: 180px;
  background: #fff; padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
}
.pay-qr__code i { background: transparent; }
.pay-qr__code i.on { background: var(--ink); }
.pay-done { padding-block: var(--s-9); text-align: center; display: grid; gap: var(--s-4); justify-items: center; }
.pay-done__mark { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; background: var(--sage-wash); color: #3d4c40; font-size: 26px; }
.pay-done__actions { display: flex; gap: var(--s-2); flex-wrap: wrap; justify-content: center; }

/* 兑换弹层：两种授权形态选择 */
.offer-pick { display: inline-flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.offer-pick__btn {
  height: 30px; padding-inline: 10px;
  border: 1px solid var(--line); background: #fff;
  border-radius: var(--r-1); font: inherit; font-size: 12.5px;
  color: var(--ink-2); cursor: pointer; white-space: nowrap;
}
.offer-pick__btn.is-on { border-color: var(--ink); color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }

/* 工作台：钱包（积分 / 可提现） */
.wb-wallet {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
  gap: var(--s-4);
  align-items: end;
  margin-top: var(--s-4);
  padding: var(--s-4);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
}
.wb-wallet__cell { display: grid; gap: 3px; }
.wb-wallet__k { font-size: 11.5px; color: var(--ink-3); letter-spacing: .03em; }
.wb-wallet__v { font-family: var(--font-num); font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; }
.wb-wallet__n { font-size: 11px; color: var(--ink-3); }
.wb-wallet__act { display: flex; gap: 8px; align-items: center; }
.wb-wallet__input { height: 38px; width: 150px; }
@media (max-width: 760px) {
  .wb-wallet { grid-template-columns: 1fr; }
  .wb-wallet__input { width: 100%; }
}

/* ==========================================================================
   课程创作台
   ========================================================================== */
.studio { padding-bottom: 0; }
.studio__bar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-3);
  padding: 10px clamp(14px, 2vw, 28px);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 7;
}
.studio__bar-left, .studio__bar-right { display: flex; align-items: center; gap: 10px; }
.studio__badge { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.studio__name { border: 0; background: none; font-family: var(--font-serif); font-size: 19px; font-weight: 600; color: var(--ink); min-width: 260px; outline: none; }
.studio__saved { font-size: 12px; color: var(--ink-3); }

.studio__grid {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr) 300px;
  gap: 0;
  min-height: calc(100vh - var(--header-h) - 120px);
}
.studio__tree, .studio__inspector { border-right: 1px solid var(--line); padding: var(--s-4) var(--s-3); }
.studio__inspector { border-right: 0; border-left: 1px solid var(--line); }
.studio__pane-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; font-size: 12px; letter-spacing: .05em; color: var(--ink-3); }
.studio__pane-foot { margin-top: var(--s-3); }
.studio__mini { border: 1px solid var(--line); background: #fff; border-radius: var(--r-1); font: inherit; font-size: 11.5px; padding: 4px 8px; color: var(--ink-2); cursor: pointer; }
.studio__mini:hover { border-color: var(--ink-2); color: var(--ink); }

.st-tree__group { margin-bottom: var(--s-4); }
.st-tree__label { display: block; font-size: 11px; letter-spacing: .06em; color: var(--ink-3); margin-bottom: 6px; }
.st-tree__unit { font-size: 12.5px; color: var(--ink-2); padding: 6px 8px; border-radius: var(--r-1); cursor: pointer; margin-bottom: 2px; }
.st-tree__unit.is-on { background: var(--paper-deep); color: var(--ink); font-weight: 600; }
.st-tree__page {
  display: flex; align-items: center; gap: 8px; width: 100%;
  border: 0; background: none; text-align: left; cursor: pointer;
  padding: 5px 8px; border-radius: var(--r-1); font: inherit; font-size: 12.5px; color: var(--ink-2);
}
.st-tree__page:hover { background: var(--paper-deep); }
.st-tree__page.is-on { background: var(--ink); color: var(--paper); }
.st-tree__n { font-family: var(--font-num); font-size: 10.5px; opacity: .6; }

.studio__canvas-wrap { padding: var(--s-4); min-width: 0; }
.studio__toolbar { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: var(--s-3); }
.st-tool { border: 1px solid var(--line); background: #fff; border-radius: var(--r-1); font: inherit; font-size: 12.5px; padding: 6px 10px; cursor: pointer; color: var(--ink-2); }
.st-tool:hover { border-color: var(--ink-2); color: var(--ink); }
.st-tool--danger { color: var(--clay); border-color: var(--line-strong); }
.studio__divider { width: 1px; background: var(--line); margin-inline: 4px; }
.studio__canvas { display: grid; place-items: center; }
.st-canvas {
  position: relative; width: 100%; aspect-ratio: 16 / 9;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-2);
  overflow: hidden;
}
.st-canvas__empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--ink-3); font-size: 13px; }
.st-item { position: absolute; border: 1px solid transparent; }
.st-item:hover { border-color: var(--line-strong); }
.st-item.is-sel { border-color: var(--indigo, #24344f); box-shadow: 0 0 0 1px var(--indigo, #24344f); }
.st-item__text { width: 100%; height: 100%; font-size: clamp(11px, 2.1vh, 20px); line-height: 1.4; outline: none; white-space: pre-wrap; }
.st-item--dot { width: 14px; height: 14px; border-radius: 50%; background: var(--clay); border: 2px solid #fff; box-shadow: 0 0 0 1px var(--clay); }
.studio__hint { margin-top: 10px; font-size: 11.5px; color: var(--ink-3); }

.st-props { display: grid; gap: 8px; }
.st-field { display: grid; gap: 3px; font-size: 11.5px; color: var(--ink-3); }
.st-field .input { font-size: 13px; }
.st-ai { display: grid; gap: 8px; }
.st-ai__out { font-size: 12.5px; line-height: 1.6; resize: vertical; }
.st-ai__foot { display: flex; align-items: center; justify-content: space-between; font-size: 11.5px; color: var(--ink-3); }

@media (max-width: 1100px) {
  .studio__grid { grid-template-columns: 190px minmax(0, 1fr); }
  .studio__inspector { display: none; }
}

/* ==========================================================================
   素材库
   ========================================================================== */
.as-drop { display: grid; gap: 4px; justify-items: center; padding: var(--s-6); margin-bottom: var(--s-4); }
.as-drop strong { font-family: var(--font-serif); font-size: 16px; }
.as-tools { display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap; margin-bottom: var(--s-4); }
.as-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.as-filters .st-tool.is-on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.as-search { max-width: 220px; height: 34px; }
.as-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--s-3); padding-bottom: var(--s-7); }
.as-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); overflow: hidden; display: grid; }
.as-card__thumb {
  position: relative; aspect-ratio: 16 / 10;
  background: var(--paper-deep) center/cover no-repeat;
  display: grid; place-items: center;
}
.as-card__thumb[data-big]::after {
  content: attr(data-big);
  font-family: var(--font-num); font-size: 12px; letter-spacing: .08em;
  color: var(--ink-3); text-transform: uppercase;
}
.as-card__kind { position: absolute; left: 8px; top: 8px; font-size: 10.5px; padding: 1px 7px; border-radius: var(--r-pill); background: rgba(255,255,255,.9); color: var(--ink-2); }
.as-card__body { padding: 8px 10px 4px; }
.as-card__name { margin: 0; font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.as-card__meta { margin: 2px 0 0; font-size: 11px; color: var(--ink-3); }
.as-card__act { display: flex; gap: 4px; flex-wrap: wrap; padding: 8px 10px 10px; }
.as-card__act .studio__mini { padding: 3px 7px; font-size: 11px; }

/* 创作台：课前/课后表单、文件元素、分组按钮 */
.st-form { display: grid; gap: 10px; max-width: 720px; padding: var(--s-4); background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); }
.st-form[hidden] { display: none; }
.st-tree__group-btn {
  display: flex; align-items: baseline; justify-content: space-between; gap: 6px; width: 100%;
  border: 1px solid transparent; background: none; border-radius: var(--r-1);
  padding: 6px 8px; cursor: pointer; font: inherit; font-size: 12px; color: var(--ink-3); text-align: left;
}
.st-tree__group-btn:hover { background: var(--paper-deep); }
.st-tree__group-btn.is-on { background: var(--paper-deep); color: var(--ink); border-color: var(--line); }
.st-item__file {
  display: grid; place-items: center; width: 100%; height: 100%;
  border: 1px dashed var(--line-strong); border-radius: var(--r-1);
  font-size: 11.5px; color: var(--ink-3); background: var(--paper);
}

/* 创作台：文档 tabs / 排版 / 游戏页 */
.st-docs__tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.st-docs__tabs .st-tool.is-on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.st-order { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }
.st-game { width: 100%; height: 100%; display: grid; align-content: center; gap: 8px; padding: 4%; }
.st-game__row { display: flex; align-items: center; gap: 10px; font-size: clamp(11px, 1.8vh, 16px); }
.st-game__dot { color: var(--ink-3); }
.st-game__cards { display: flex; flex-wrap: wrap; gap: 8px; }
.st-game__card {
  padding: 6px 10px; border: 1px solid var(--line); border-radius: var(--r-2);
  background: var(--paper); font-size: clamp(10px, 1.6vh, 14px);
}

/* 教室：互动块 */
.game { width: 100%; height: 100%; display: flex; gap: 4%; padding: 2% 3%; align-content: center; flex-wrap: wrap; }
.game--match { justify-content: space-between; }
.game__col { display: grid; gap: 8px; align-content: center; width: 46%; }
.game-chip {
  border: 1px solid var(--line-strong); background: #fff; border-radius: var(--r-2);
  padding: 8px 10px; font: inherit; font-size: clamp(10px, 1.6vh, 15px);
  color: var(--ink); cursor: pointer; text-align: left;
}
.game-chip:hover { border-color: var(--ink-2); }
.game-chip.is-sel { border-color: var(--indigo, #24344f); box-shadow: inset 0 0 0 1px var(--indigo, #24344f); }
.game-chip.is-ok { border-color: #3d4c40; background: var(--sage-wash); }
.game-chip.is-no { border-color: var(--clay); background: var(--clay-wash); }
.game--pick .game-chip--big { flex: 1 1 40%; text-align: center; padding: 14px 10px; }
.game--sort { align-items: center; }

/* 创作台：素材预览层 */
.st-preview { position: fixed; inset: 0; z-index: 60; background: rgba(23,20,15,.55); display: grid; place-items: center; padding: 4vw; }
.st-preview__box { position: relative; width: min(900px, 100%); max-height: 86vh; background: #fff; border-radius: var(--r-3); overflow: hidden; }
.st-preview__box img, .st-preview__box video { display: block; width: 100%; max-height: 86vh; object-fit: contain; }
.st-preview__box iframe { width: 100%; height: 80vh; border: 0; }
.st-preview__note { padding: var(--s-9) var(--s-5); text-align: center; color: var(--ink-2); }
.st-preview__x { position: absolute; right: 10px; top: 10px; width: 30px; height: 30px; border: 0; border-radius: 50%; background: rgba(255,255,255,.9); font-size: 18px; cursor: pointer; }

/* ==========================================================================
   H5P 互动内容
   ========================================================================== */
.h5p-host { width: 100%; height: 100%; }
.h5p-host .h5p-iframe-wrapper, .h5p-host iframe { width: 100% !important; height: 100% !important; border: 0; }
.h5p-host__err { padding: var(--s-4); font-size: 12.5px; color: var(--clay); }
.st-h5p { width: 100%; height: 100%; border: 1px solid var(--line); border-radius: var(--r-2); overflow: hidden; background: #fff; }
.slide-canvas__item .st-h5p { background: #fff; }

/* ==========================================================================
   教室：授课模式（大屏 / 投影 / 手机）
   ========================================================================== */
body.is-clean .site-header,
body.is-clean .stage-tools,
body.is-clean .classroom__bar,
body.is-clean .classroom__rail,
body.is-clean .classroom__side,
body.is-clean .rail-note,
body.is-clean .site-footer { display: none !important; }
body.is-clean .classroom__bar { display: none !important; }
body.is-clean .classroom__body { grid-template-columns: 1fr !important; }
body.is-clean .stage { padding: 0; }
body.is-clean .slide { border-radius: 0; border: 0; height: 100vh; }

body.is-present .site-header,
body.is-present .stage-tools,
body.is-present .classroom__bar,
body.is-present .classroom__rail,
body.is-present .classroom__side,
body.is-present .rail-note,
body.is-present .site-footer,
body.is-present .present-hud { display: none !important; }
body.is-present .classroom__body { grid-template-columns: 1fr !important; }
body.is-present .slide { height: 100vh; border: 0; border-radius: 0; }

.blank-screen {
  position: fixed; inset: 0; z-index: 80;
  background: var(--ink); color: rgba(247,242,232,.5);
  display: grid; place-items: center; font-size: 13px; letter-spacing: .06em;
  cursor: pointer;
}
.blank-screen[hidden] { display: none; }

.present-hud {
  position: fixed; left: 50%; bottom: 14px; transform: translateX(-50%);
  display: flex; gap: 14px; align-items: center;
  max-width: min(900px, 92vw);
  padding: 8px 14px; border-radius: var(--r-pill);
  background: rgba(23,20,15,.82); color: var(--paper);
  font-size: 12px; z-index: 40;
  backdrop-filter: blur(6px);
}
.present-hud__note, .present-hud [data-hud-note] {
  max-width: 60ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: rgba(247,242,232,.72);
}
.present-hud[hidden] { display: none; }

/* 教室：在线 / 离线可播 */
.net-chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 26px; padding-inline: 9px; border-radius: var(--r-pill);
  background: rgba(255,255,255,.08); color: rgba(247,242,232,.8);
  font-size: 11.5px; white-space: nowrap;
}
.net-chip__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--sage); }
.net-chip__dot.is-off { background: var(--ochre); }

/* 创作台：填空 / 拖拽预览 */
.st-fill { width: 100%; height: 100%; display: grid; align-content: center; font-size: clamp(12px, 2.4vh, 26px); line-height: 1.7; }
.st-blank { display: inline-block; min-width: 3em; border-bottom: 1px dashed var(--ink-3); }
.st-drag { width: 100%; height: 100%; display: grid; grid-template-rows: 1fr auto; gap: 8px; padding: 3%; }
.st-drag__pool { display: flex; flex-wrap: wrap; gap: 6px; align-content: flex-start; }
.st-drag__chip { padding: 5px 9px; border: 1px solid var(--line); border-radius: var(--r-2); background: #fff; font-size: clamp(10px, 1.6vh, 14px); }
.st-drag__buckets { display: flex; gap: 10px; }
.st-drag__bucket { flex: 1; min-height: 44px; border: 1px dashed var(--line-strong); border-radius: var(--r-2); display: grid; place-items: center; font-size: clamp(10px, 1.6vh, 13px); color: var(--ink-3); }

/* 教室：填空 / 拖拽 */
.fill-q { width: 100%; height: 100%; display: grid; align-content: center; font-size: clamp(14px, 3vh, 34px); line-height: 1.9; }
.fill-blank {
  display: inline-block; width: 4.5em; padding: 0 .3em;
  border: 0; border-bottom: 2px solid var(--line-strong); background: transparent;
  font: inherit; font-size: .9em; color: var(--indigo, #24344f); text-align: center;
}
.fill-blank:focus { outline: none; border-bottom-color: var(--clay); }
.fill-blank.is-ok { border-bottom-color: var(--sage); color: var(--sage); }
.fill-blank.is-no { border-bottom-color: var(--clay); color: var(--clay); }
.drag-game { width: 100%; height: 100%; display: grid; grid-template-rows: 1fr auto; gap: 10px; padding: 2% 3%; }
.drag-game__pool { display: flex; flex-wrap: wrap; gap: 8px; align-content: flex-start; }
.drag-chip {
  border: 1px solid var(--line-strong); background: #fff; border-radius: var(--r-2);
  padding: 7px 11px; font: inherit; font-size: clamp(11px, 1.8vh, 16px); cursor: pointer;
}
.drag-chip.is-sel { border-color: var(--indigo, #24344f); box-shadow: inset 0 0 0 1px var(--indigo, #24344f); }
.drag-chip.is-ok { border-color: var(--sage); background: var(--sage-wash); }
.drag-chip.is-no { border-color: var(--clay); background: var(--clay-wash); }
.drag-game__buckets { display: flex; gap: 12px; }
.drag-bucket {
  flex: 1; min-height: 64px; border: 1px dashed var(--line-strong); border-radius: var(--r-2);
  background: transparent; font: inherit; font-size: clamp(11px, 1.7vh, 15px); color: var(--ink-3); cursor: pointer;
}
.drag-bucket.is-hit { border-color: var(--sage); color: var(--sage); }

/* 创作台：找物题 */
.st-find { position: relative; width: 100%; height: 100%; background: var(--paper); border-radius: var(--r-2); overflow: hidden; }
.st-find__prompt { position: absolute; left: 3%; top: 3%; font-size: clamp(10px, 1.6vh, 15px); color: var(--ink-2); }
.st-find__ring {
  position: absolute; transform: translate(-50%, -50%);
  border: 1px dashed var(--clay); border-radius: 50%;
  height: 0; box-sizing: border-box;
}

/* 教室：找物题 */
.find-game { position: relative; width: 100%; height: 100%; background: var(--paper); border-radius: var(--r-2); overflow: hidden; }
.find-game__prompt { position: absolute; left: 3%; top: 3%; font-size: clamp(11px, 1.9vh, 17px); color: var(--ink-2); }
.find-game__score { position: absolute; right: 3%; top: 3%; font-family: var(--font-num); font-size: clamp(10px, 1.6vh, 15px); color: var(--ink-3); }
.find-dot {
  position: absolute; transform: translate(-50%, -50%);
  border: 0; border-radius: 50%; background: transparent; cursor: pointer;
  height: 0; box-sizing: border-box;
}
.find-dot:hover { box-shadow: 0 0 0 2px rgba(178,63,39,.25); }
.find-dot.is-found { background: rgba(79,97,82,.18); box-shadow: 0 0 0 2px var(--sage); }
.find-miss {
  position: absolute; width: 18px; height: 18px; margin: -9px 0 0 -9px;
  border-radius: 50%; border: 2px solid var(--clay); opacity: .8;
  animation: findMiss .6s ease-out forwards; pointer-events: none;
}
@keyframes findMiss { to { transform: scale(2.2); opacity: 0; } }

/* ==========================================================================
   教室：手机竖屏（老师用手机或平板讲课）
   ========================================================================== */
@media (max-width: 760px) {
  .classroom__bar { flex-wrap: wrap; row-gap: 6px; padding: 8px 12px; }
  .classroom__bar-actions { flex-wrap: wrap; row-gap: 6px; }
  .classroom__body { grid-template-columns: 1fr !important; }
  .classroom__rail, .classroom__side { display: none !important; }
  .stage { padding: 8px 8px 0; }
  .slide { border-radius: var(--r-2); }
  .slide__canvas, .slide-canvas { min-height: 0; }
  .stage-tools {
    flex-wrap: wrap; row-gap: 6px; padding: 8px;
    position: sticky; bottom: 0; background: var(--paper);
  }
  .stage-tools .tool-btn { flex: 1 1 auto; justify-content: center; min-width: 84px; }
  .stage-pager { width: 100%; text-align: center; }
  .fill-q { font-size: clamp(15px, 4.4vw, 24px); }
  .drag-game__buckets { flex-direction: column; }
  .drag-bucket { min-height: 52px; }
  .present-hud { bottom: 8px; font-size: 11px; max-width: 94vw; }
}

/* 插画 SVG 一律裁切，避免描边/形变渗出卡片撑破横向滚动 */
.wall-card svg, .cw-card svg, .hero-art svg, .cover-art svg { overflow: hidden; }
.wall-card, .wall-card__art, .wall-card__art svg { overflow: hidden; }

/* ==========================================================================
   手机端适配（网页端；小程序后续单独做）
   ========================================================================== */
@media (max-width: 760px) {
  /* 通用：段落与卡片不撑破屏幕 */
  .wrap { padding-inline: 16px; }
  .section__head { grid-template-columns: 1fr !important; gap: var(--s-4); }
  .section__head-aside { max-width: none; }
  .h1 { font-size: clamp(26px, 8.4vw, 34px); line-height: 1.22; }
  .h2 { font-size: clamp(21px, 6.4vw, 26px); }
  .lede { font-size: 15px; }
  .note { grid-template-columns: 3px 1fr; }
  .link-arrow { font-size: 14px; }

  /* 表格与表单 */
  .table, table { font-size: 13px; }
  .field, .form-grid, .grid-2, .grid-3 { grid-template-columns: 1fr !important; }
  .input, select, textarea { font-size: 16px; } /* 防 iOS 聚焦缩放 */

  /* 卡片网格 */
  .cw-grid, .grid { grid-template-columns: 1fr !important; }

  /* 灵感墙：两栏变一栏更耐看 */
  .wall-masonry { columns: 1 !important; }
  .wall-toolbar { padding-inline: 16px; }
  .wall-filters { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .wall-filters::-webkit-scrollbar { display: none; }

  /* 弹层铺满 */
  .sheet__panel { width: 100%; max-height: 92vh; }
  .sheet { align-items: flex-end; }

  /* CTA 按钮整行 */
  .btn--block-mobile { width: 100%; justify-content: center; }
}

/* 创作台：手机上抽屉式面板 */
@media (max-width: 900px) {
  .studio__grid { grid-template-columns: 1fr !important; }
  .studio__tree, .studio__inspector {
    position: fixed; top: 0; bottom: 0; z-index: 40;
    width: min(86vw, 320px); background: var(--paper);
    box-shadow: var(--shadow-2, 0 10px 40px rgba(0,0,0,.18));
    overflow-y: auto; padding-top: 64px;
    transition: transform .22s ease;
  }
  .studio__tree { left: 0; display: none; border-right: 1px solid var(--line); }
  .studio__inspector { right: 0; display: none; border-left: 1px solid var(--line); }
  body.st-tree-open .studio__tree { display: block; }
  body.st-props-open .studio__inspector { display: block; }
  .studio__bar { flex-wrap: wrap; row-gap: 8px; }
  .studio__bar-right { width: 100%; justify-content: flex-end; }
  .studio__canvas-wrap { padding: 12px; }
  .st-canvas { aspect-ratio: 4 / 3; }
  .studio__toolbar { gap: 6px; }
  .st-tool { font-size: 12px; padding: 6px 9px; }
}

/* 创作台：桌面端隐藏抽屉按钮 */
.st-only-m { display: none; }
@media (max-width: 900px) {
  .st-only-m { display: inline-flex; }
}

/* 教室：竖屏（手机讲课）——画布改 4:3，字号按宽度收敛 */
@media (max-width: 760px) and (orientation: portrait) {
  .slide { aspect-ratio: auto; }
  .slide__canvas, .slide-canvas-wrap { aspect-ratio: 4 / 3; }
  .slide-canvas { aspect-ratio: 4 / 3; }
  .slide-canvas__text, .st-item__text {
    font-size: clamp(13px, 4.2vw, 24px) !important;
    line-height: 1.5;
  }
  .fill-q { font-size: clamp(15px, 4.6vw, 24px); }
  .game-chip, .drag-chip { font-size: 13px; }
  .find-game__prompt { font-size: 13px; }
}

/* 手机端：灵感墙工具条与筛选项不撑破屏幕 */
@media (max-width: 760px) {
  .wall-search, .wall-search--wide { min-width: 0; max-width: 100%; width: 100%; flex: 1 1 auto; }
  .wall-tools__row { width: 100%; }
  .wall-filters {
    width: 100%; flex-wrap: nowrap; overflow-x: auto;
    -webkit-overflow-scrolling: touch; padding-bottom: 4px;
  }
  .wall-filters::-webkit-scrollbar { display: none; }
  .wall-filters select { flex: 0 0 auto; }
  .wall-view { margin-left: 0; }
}

/* 教室竖屏：工具条吸底一行，画面吃满剩余高度 */
@media (max-width: 760px) and (orientation: portrait) {
  .stage { padding: 8px 8px 88px; }
  .stage-tools {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 25;
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    background: var(--paper);
    border-top: 1px solid var(--line);
    flex-wrap: nowrap; overflow-x: auto; gap: 6px;
  }
  .stage-tools::-webkit-scrollbar { display: none; }
  .stage-tools .tool-btn { flex: 0 0 auto; min-width: 0; font-size: 12px; padding: 6px 10px; }
  .stage-pager { flex: 0 0 auto; font-size: 11px; }
  .slide { min-height: calc(100vh - 96px); }
}

/* 创作台：H5P 包选择弹层 */
.st-h5p__box { padding: var(--s-5); max-height: 80vh; overflow: auto; }
.st-h5p__list { display: grid; gap: 8px; }
.st-h5p__row { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--r-2); }
.st-h5p__act { display: flex; gap: 6px; flex-shrink: 0; }

/* 教室：离线包状态 */
.net-chip--offline { background: rgba(79,97,82,.28); color: rgba(247,242,232,.92); }
.net-chip--offline[hidden] { display: none; }

/* 手机端：灵感墙工具条（grid 列必须可收缩，否则 nowrap 的筛选条会把整页撑宽） */
@media (max-width: 760px) {
  .wall-tools { grid-template-columns: minmax(0, 1fr); }
  .wall-tools__row { min-width: 0; }
  .wall-filters { min-width: 0; }
  .wall-search--wide { max-width: 100%; }
}

/* 横向安全网：只裁掉 1–2px 级的越界，不产生滚动容器（overflow-x:hidden 会） */
html, body { overflow-x: clip; }


/* 可访问性兜底：减少动效 / 键盘焦点可见 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible,
textarea:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 2px;
  border-radius: var(--r-1);
}

/* 账号：登录/注册/找回 */
.auth-links { display: flex; gap: var(--s-4); flex-wrap: wrap; margin-top: var(--s-4); }
.auth-reset { margin-top: var(--s-5); padding: var(--s-5); background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); display: grid; gap: var(--s-3); }
.auth-reset[hidden] { display: none; }
.role-pick { display: flex; gap: var(--s-3); flex-wrap: wrap; }
.role-pick__opt {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 12px; border: 1px solid var(--line); border-radius: var(--r-2);
  background: #fff; font-size: 13.5px; cursor: pointer;
}
.role-pick__opt:has(input:checked) { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }

/* 账号资料卡 */
.profile-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-3); padding: var(--s-5); }
.profile-card__head { display: flex; align-items: center; gap: var(--s-3); }
.profile-card__avatar {
  width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--ink); color: var(--paper);
  font-family: var(--font-serif); font-size: 19px; flex: none;
}
.profile-card__out { margin-left: auto; }
.profile-card__actions { display: flex; gap: var(--s-3); margin-top: var(--s-4); flex-wrap: wrap; }
.pass-box { margin-top: var(--s-4); padding-top: var(--s-4); border-top: 1px solid var(--line); display: grid; gap: var(--s-3); max-width: 420px; }
.pass-box[hidden] { display: none; }

/* 实名 / 收款 */
.kyc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-4); margin-top: var(--s-4); }
@media (max-width: 760px) { .kyc-grid { grid-template-columns: 1fr; } }
.kyc-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-3); padding: var(--s-5); }
.kyc-card__head { display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); margin-bottom: 8px; }
.kyc-badge {
  font-size: 11.5px; padding: 2px 9px; border-radius: var(--r-pill);
  background: var(--paper-deep); color: var(--ink-3);
}
.kyc-badge[data-on="1"] { background: var(--sage-wash); color: var(--sage); }
.kyc-card__line { margin: 6px 0 0; font-size: 13.5px; }

/* 授权证书：实名状态 */
.cert__v.is-ok { color: var(--sage); }
.cert__v.is-warn { color: var(--clay); }

/* 授权证书：卖方实名标记 */
.cert__kyc { margin-left: 8px; font-size: 11px; padding: 1px 7px; border-radius: var(--r-pill); white-space: nowrap; }
.cert__kyc.is-ok { background: var(--sage-wash); color: var(--sage); }
.cert__kyc.is-warn { background: var(--clay-wash); color: var(--clay); }

/* ==========================================================================
   Visual polish — 纸张质感、层次、微交互
   （只动视觉，不动结构与文案；所有颜色都来自 tokens）
   ========================================================================== */

/* 纸纹：一层极淡的噪声，让大面积暖纸不显得"数码平" */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  opacity: .55;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
}
body > * { position: relative; z-index: 1; }

/* 标题：中文标题收紧字距、加大黑白对比 */
.h1, .h2, .h3 { letter-spacing: -0.012em; }
.h1 { line-height: 1.14; }
.h2 { line-height: 1.2; }

/* 数字统一等宽，价格与统计不跳动 */
.points__n, .price-duo__yuan, [data-points], .wb-kpi__v, .wall-card__price, .fact__v {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* 按钮：统一高度、按压反馈、可见焦点 */
.btn {
  min-height: 44px;
  border-radius: 10px;
  transition: transform .16s var(--ease-out), background-color .16s var(--ease-out),
              border-color .16s var(--ease-out), box-shadow .16s var(--ease-out);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(.995); }
.btn--solid, .btn--primary { box-shadow: var(--shadow-1); }
.btn--solid:hover, .btn--primary:hover { box-shadow: var(--shadow-2); }
.btn--ghost { background: transparent; }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }

/* 卡片：统一圆角 + 分层阴影 + 悬停抬起 */
.cw-card, .wall-card, .tile, .kyc-card, .profile-card, .chip, .price-block {
  border-radius: var(--r-card);
}
.cw-card, .wall-card {
  box-shadow: var(--shadow-1);
  transition: transform .22s var(--ease-out), box-shadow .22s var(--ease-out),
              border-color .22s var(--ease-out);
}
.cw-card:hover, .wall-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
  border-color: var(--line-strong);
}
.cw-card__cover, .wall-card__art { overflow: hidden; }
.cw-card__cover svg, .wall-card__art svg,
.cw-card__cover img, .wall-card__art img {
  transition: transform .5s var(--ease-out);
}
.cw-card:hover .cw-card__cover svg, .wall-card:hover .wall-card__art svg,
.cw-card:hover .cw-card__cover img, .wall-card:hover .wall-card__art img { transform: scale(1.03); }

/* 首屏：更稳的编辑感——标题与正文之间拉开呼吸 */
.hero .h1 { margin-bottom: var(--s-4); }
.hero .lede { max-width: 54ch; }

/* 章节：统一上下节奏 */
.section { padding-block: clamp(40px, 5vw, 72px); }
.section__head { margin-bottom: var(--s-5); }

/* 面包屑与元信息更轻 */
.eyebrow { letter-spacing: .12em; }

/* 链接：下划线离开文字一点，不压字 */
.link-arrow { transition: gap .18s var(--ease-out), color .18s var(--ease-out); }

/* 输入：更大的触控面积与一致的聚焦反馈 */
.input, select, textarea { border-radius: 10px; }
.input:focus, select:focus, textarea:focus { outline: none; box-shadow: var(--ring); border-color: var(--clay); }

/* 段落密度：正文行宽与行高 */
.body-copy { line-height: var(--leading-body); }

@media (prefers-reduced-motion: reduce) {
  .btn:hover, .cw-card:hover, .wall-card:hover { transform: none; }
  .cw-card:hover .cw-card__cover svg, .wall-card:hover .wall-card__art svg { transform: none; }
}

/* 灵感墙：留出画面边缘，卡片不贴死视口 */
.wall-masonry, .wall-grid { padding-inline: clamp(16px, 3vw, 40px); }
.wall-card {
  border: 1px solid var(--line);
  background: var(--paper-card);
}
.wall-card__body { padding: 12px 14px 14px; }
.wall-card__title { letter-spacing: -0.01em; }
.wall-card__price { font-weight: 600; }
.wall-card__foot { padding-top: 8px; }

/* 标签条：更像"筛选条"而不是一堆药丸 */
.wall-tags .tag, .wall-card__tags span { border-radius: 6px; }

/* ==========================================================================
   运营后台
   ========================================================================== */
.adm-tabs { display: flex; gap: 4px; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: var(--s-5); }
.adm-tab {
  border: 0; background: none; font: inherit; font-size: 13.5px;
  padding: 10px 14px; cursor: pointer; color: var(--ink-3);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  display: inline-flex; align-items: center; gap: 6px;
}
.adm-tab:hover { color: var(--ink); }
.adm-tab.is-on { color: var(--ink); border-bottom-color: var(--clay); font-weight: 600; }
.adm-tab__n {
  font-size: 11px; min-width: 18px; text-align: center;
  padding: 1px 5px; border-radius: var(--r-pill);
  background: var(--clay); color: #fff;
}
.adm-stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: var(--s-3); }
.adm-stat { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px 16px; }
.adm-stat__k { display: block; font-size: 11.5px; color: var(--ink-3); letter-spacing: .03em; }
.adm-stat__v { font-family: var(--font-num); font-size: 24px; font-variant-numeric: tabular-nums; }
.adm-toolbar { display: flex; gap: var(--s-3); align-items: flex-end; flex-wrap: wrap; margin-bottom: var(--s-4); }
.adm-list { display: grid; gap: 10px; }
.adm-row {
  display: flex; gap: var(--s-4); justify-content: space-between; align-items: flex-start;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px 16px;
}
.adm-row__main { min-width: 0; }
.adm-row__main b { font-size: 14.5px; }
.adm-row__main p { margin: 3px 0 0; }
.adm-row__act { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; flex: none; }
.adm-badge { font-size: 11px; padding: 2px 8px; border-radius: var(--r-pill); background: var(--paper-deep); color: var(--ink-3); }
.adm-badge--live, .adm-badge--ok, .adm-badge--paid { background: var(--sage-wash); color: var(--sage); }
.adm-badge--review, .adm-badge--pending { background: var(--ochre-wash); color: #6b4d1c; }
.adm-badge--rejected, .adm-badge--no { background: var(--clay-wash); color: var(--clay); }
.adm-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-card); background: #fff; }
.adm-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.adm-table th, .adm-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.adm-table th { font-weight: 600; color: var(--ink-3); font-size: 11.5px; letter-spacing: .04em; white-space: nowrap; }
.adm-table tr:last-child td { border-bottom: 0; }
.btn--sm { min-height: 34px; padding-inline: 12px; font-size: 12.5px; }
@media (max-width: 760px) {
  .adm-row { flex-direction: column; }
  .adm-row__act { width: 100%; justify-content: flex-end; }
}

/* ==========================================================================
   版式：让 data-* 与变量真正驱动排版
   ========================================================================== */

/* 容器宽度与正文行宽 */
.wrap { max-width: var(--wrap-max, 1180px); margin-inline: auto; }
.body-copy, .lede, .prose { max-width: var(--measure, 68ch); }

/* 标题字体可切（默认宋体，切到 sans 时整站标题变黑体） */
html[data-heading="sans"] .h1,
html[data-heading="sans"] .h2,
html[data-heading="sans"] .h3,
html[data-heading="sans"] .h4,
html[data-heading="sans"] .pdp__title,
html[data-heading="sans"] .hero .h1 { font-family: var(--font-sans); letter-spacing: -0.02em; }

/* 密度：只动纵向节奏与卡片内边距，不动字号 */
html[data-density="compact"] .section { padding-block: clamp(28px, 3.4vw, 52px); }
html[data-density="compact"] .section__head { margin-bottom: var(--s-4); }
html[data-density="compact"] .cw-card__body,
html[data-density="compact"] .wall-card__body { padding: 10px 12px 12px; }
html[data-density="compact"] .adm-table th,
html[data-density="compact"] .adm-table td { padding: 7px 10px; }

html[data-density="relaxed"] .section { padding-block: clamp(56px, 7vw, 104px); }
html[data-density="relaxed"] .section__head { margin-bottom: var(--s-6); }
html[data-density="relaxed"] .cw-card__body,
html[data-density="relaxed"] .wall-card__body { padding: 18px 20px 20px; }
html[data-density="relaxed"] .lede { line-height: 1.85; }

/* 阴影强度 */
html[data-shadow="flat"] .cw-card,
html[data-shadow="flat"] .wall-card,
html[data-shadow="flat"] .adm-row,
html[data-shadow="flat"] .adm-stat { box-shadow: none; }
html[data-shadow="lifted"] .cw-card,
html[data-shadow="lifted"] .wall-card { box-shadow: var(--shadow-3); }

/* 卡片圆角跟随配置 */
.cw-card, .wall-card, .adm-row, .adm-stat, .adm-table-wrap, .profile-card, .kyc-card {
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card, var(--shadow-1));
}
.cw-card:hover, .wall-card:hover { box-shadow: var(--shadow-2); }

/* 正文排版细节：段落间距、列表、引用、表格 */
.lede { line-height: 1.72; }
.prose p, .body-copy p { margin: 0 0 1.05em; }
.prose p:last-child, .body-copy p:last-child { margin-bottom: 0; }
.dot-list { padding-left: 1.1em; }
.dot-list li { margin: 6px 0; line-height: 1.7; }
blockquote { border-left: 2px solid var(--accent, var(--clay)); padding-left: 16px; color: var(--ink-2); }

/* 表格：更稳的行高与数字对齐 */
.adm-table td, table td { line-height: 1.6; }
.adm-table td:has(.mono-num), .mono-num { font-variant-numeric: tabular-nums; }

/* 表单：字段间距按密度微调 */
.field + .field { margin-top: var(--s-3); }
html[data-density="relaxed"] .field + .field { margin-top: var(--s-4); }

/* 运营后台：版式配置 */
.adm-layout { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: var(--s-5); align-items: start; }
@media (max-width: 980px) { .adm-layout { grid-template-columns: 1fr; } }
.adm-layout__form { display: grid; gap: var(--s-3); background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: var(--s-5); }
.adm-presets { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: var(--s-2); }
.adm-preset { border: 1px solid var(--line); background: var(--paper); border-radius: var(--r-pill); font: inherit; font-size: 12.5px; padding: 5px 12px; cursor: pointer; }
.adm-preset:hover { border-color: var(--ink-2); }
.adm-layout__act { display: flex; gap: var(--s-2); flex-wrap: wrap; margin-top: var(--s-3); }
.adm-layout__preview { position: sticky; top: 20px; }
.adm-preview { background: var(--paper-card); border: 1px solid var(--line); border-radius: var(--r-card); padding: 20px; box-shadow: var(--shadow-card, var(--shadow-1)); }
.adm-preview__eyebrow { margin: 0 0 8px; font-size: 11.5px; letter-spacing: .1em; color: var(--ink-3); }
.adm-preview__title { margin: 0 0 10px; font-family: var(--font-serif); font-size: clamp(22px, 2vw, 30px); line-height: 1.2; }
html[data-heading="sans"] .adm-preview__title { font-family: var(--font-sans); }
.adm-preview__body { margin: 0 0 16px; font-size: 14px; line-height: var(--leading-body); color: var(--ink-2); max-width: var(--measure, 68ch); }
.adm-preview__row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.adm-preview__price { font-family: var(--font-num); font-variant-numeric: tabular-nums; font-weight: 600; }

/* 版式配置：滑杆与预览细节 */
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 28px; background: transparent; cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 3px; border-radius: 3px;
  background: linear-gradient(to right, var(--accent, var(--clay)) var(--fill, 40%), var(--line-strong) var(--fill, 40%));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; margin-top: -6.5px; border-radius: 50%;
  background: var(--accent, var(--clay)); border: 2px solid var(--paper);
  box-shadow: var(--shadow-1);
}
input[type="range"]::-moz-range-track { height: 3px; border-radius: 3px; background: var(--line-strong); }
input[type="range"]::-moz-range-progress { height: 3px; border-radius: 3px; background: var(--accent, var(--clay)); }
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent, var(--clay)); border: 2px solid var(--paper);
}
.adm-layout__form .field__label b { font-family: var(--font-num); color: var(--ink); }

/* 运营后台：待办 / CRM 抽屉 */
.adm-tasks { margin-bottom: var(--s-5); }
.adm-tasks__list { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
.adm-task {
  display: grid; gap: 2px; text-align: left; cursor: pointer;
  background: #fff; border: 1px solid var(--line); border-left: 3px solid var(--ochre);
  border-radius: var(--r-card); padding: 12px 14px; font: inherit;
}
.adm-task:hover { border-color: var(--ink-2); }
.adm-task__k { font-size: 11px; letter-spacing: .06em; color: var(--ink-3); }
.adm-task b { font-size: 14px; }

.adm-drawer { position: fixed; inset: 0; z-index: 90; }
.adm-drawer__scrim { position: absolute; inset: 0; background: rgba(23,20,15,.4); }
.adm-drawer__panel {
  position: absolute; right: 0; top: 0; bottom: 0; width: min(460px, 94vw);
  background: var(--paper); border-left: 1px solid var(--line);
  box-shadow: var(--shadow-3); display: flex; flex-direction: column;
}
.adm-drawer__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 18px 20px; border-bottom: 1px solid var(--line); }
.adm-drawer__body { padding: 18px 20px 28px; overflow-y: auto; }
.adm-def { display: grid; grid-template-columns: 84px 1fr; gap: 6px 12px; margin: 0; font-size: 13.5px; }
.adm-def dt { color: var(--ink-3); }
.adm-def dd { margin: 0; }
.adm-drawer__act { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 6px; }
.adm-drawer__h { font-size: 13px; margin: 20px 0 8px; color: var(--ink-2); }
.adm-mini { margin: 0; padding-left: 18px; font-size: 13px; line-height: 1.8; color: var(--ink-2); }
.adm-temp { background: var(--ochre-wash); border-radius: var(--r-2); padding: 10px 12px; font-size: 13px; margin: 0 0 12px; font-family: var(--font-num); }
.adm-tr-click { cursor: pointer; }
.adm-tr-click:hover { background: var(--paper); }

/* 通知 */
.notif-list { display: grid; gap: 8px; }
.notif {
  display: flex; align-items: flex-start; gap: 12px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-card);
  padding: 14px 16px;
}
.notif.is-unread { border-left: 3px solid var(--clay); }
.notif__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--line-strong); margin-top: 7px; flex: none; }
.notif.is-unread .notif__dot { background: var(--clay); }
.notif .link-arrow { margin-left: auto; flex: none; }

/* 协议页 */
.legal-nav { display: flex; gap: var(--s-4); flex-wrap: wrap; padding: var(--s-3) 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--paper); z-index: 4; }
.legal-nav__a { font-size: 13.5px; color: var(--ink-2); text-decoration: none; }
.legal-nav__a:hover { color: var(--clay); }
.legal-nav__a::before { content: "§ "; color: var(--ink-3); }
.legal-callout { background: var(--ochre-wash); border-left: 3px solid var(--ochre); border-radius: var(--r-2); padding: 14px 16px; margin-bottom: var(--s-4); }
.legal-callout p { margin: 0; }
.legal-foot { margin-top: var(--s-6); padding-top: var(--s-4); border-top: 1px solid var(--line); }
#terms .prose h3, #privacy .prose h3, #copyright .prose h3 { margin-top: var(--s-5); }

/* 在先声明 */
.claim-line { margin-top: var(--s-3); font-size: 12.5px; color: var(--ink-3); }
.claim-line .is-warn { color: var(--clay); }

/* 科目筛选 */
.wall-subject { display: flex; gap: 6px; flex-wrap: wrap; margin: 0 0 var(--s-3); }
.wall-subject__a {
  border: 1px solid var(--line); background: transparent; border-radius: 8px;
  font: inherit; font-size: 13px; padding: 6px 12px; cursor: pointer; color: var(--ink-2);
}
.wall-subject__a:hover { border-color: var(--ink-2); color: var(--ink); }
.wall-subject__a.is-on { background: var(--ink); color: var(--paper); border-color: var(--ink); }


/* 英文缩写 T2T：跟在中文名后的小标签 */
.brand__abbr {
  display: inline-block;
  font-style: normal;
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .08em;
  margin-left: 10px;
  padding: 2px 5px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--ink-3);
  vertical-align: 4px;
}

/* 老师擅长科目 */
.spec-row { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin: 0 0 var(--s-3); }
.spec-row__k { font-size: 11.5px; letter-spacing: .08em; color: var(--ink-3); }
.spec {
  font-size: 12.5px; padding: 2px 9px; border-radius: var(--r-pill);
  background: var(--paper-deep); color: var(--ink-2);
}

/* ==========================================================================
   灵感墙 → 图片主导（花瓣形态）
   图片铺满，信息收进 hover 浮层；触屏设备保留底部短标题。
   ========================================================================== */
.wall-card { position: relative; padding: 0; overflow: hidden; }
.wall-card__art { position: relative; display: block; }
.wall-card__body {
  position: absolute; inset: auto 0 0 0;
  background: linear-gradient(to top, rgba(23,20,15,.86), rgba(23,20,15,.45) 60%, rgba(23,20,15,0));
  color: var(--paper); padding: 28px 12px 10px;
  opacity: 0; transform: translateY(6px);
  transition: opacity .2s var(--ease-out), transform .2s var(--ease-out);
  pointer-events: none;
}
.wall-card:hover .wall-card__body,
.wall-card:focus-within .wall-card__body { opacity: 1; transform: translateY(0); pointer-events: auto; }
.wall-card__title, .wall-card__title a { color: var(--paper); font-size: 14px; }
.wall-card__desc, .wall-card__meta, .wall-card__tags { display: none; }
.wall-card__foot { border-top: 0; padding: 6px 0 0; }
.wall-card__price, .wall-card__price * { color: var(--paper); }
.wall-card__save { background: rgba(247,242,232,.16); color: var(--paper); border-color: rgba(247,242,232,.3); }
.wall-card__save.is-on { background: var(--paper); color: var(--ink); }

/* 触屏：没有 hover，改为图片下一条极简标题 */
@media (hover: none) {
  .wall-card__body {
    position: static; opacity: 1; transform: none;
    background: none; color: var(--ink); padding: 8px 10px 10px; pointer-events: auto;
  }
  .wall-card__title, .wall-card__title a { color: var(--ink); font-size: 13.5px; }
  .wall-card__foot { display: none; }
}

/* 无限滚动哨兵 */
.wall-sentinel { height: 1px; }
.wall-more { display: flex; justify-content: center; padding: var(--s-4) 0 var(--s-6); }

/* 画板 */
.board-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: var(--s-3); }
.board-card {
  display: grid; gap: 4px; padding: 16px; text-decoration: none;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-card);
}
.board-card:hover { border-color: var(--ink-2); box-shadow: var(--shadow-2); }
.board-card b { font-size: 15px; color: var(--ink); }
.board-card__act { display: flex; gap: 8px; margin-top: 6px; }
.board-card__act button { font: inherit; font-size: 11.5px; color: var(--ink-3); background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; }
.board-card__act button:hover { color: var(--clay); }

/* 老师主页：统计与 IP 展示 */
.t-profile { max-width: var(--wrap-max, 1180px); margin: 0 auto; padding: 0 clamp(16px, 3vw, 40px) var(--s-5); }
.t-stats {
  display: flex; align-items: center; gap: var(--s-5); flex-wrap: wrap;
  padding: 16px 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--r-card);
  box-shadow: var(--shadow-card, var(--shadow-1));
}
.t-stat { display: grid; gap: 2px; min-width: 64px; }
.t-stat b { font-family: var(--font-num); font-size: 20px; font-variant-numeric: tabular-nums; }
.t-stat span { font-size: 11.5px; color: var(--ink-3); letter-spacing: .04em; }
.t-actions { display: flex; gap: 8px; margin-left: auto; }

.t-video { margin-top: var(--s-4); }
.t-video__poster {
  position: relative; display: grid; place-items: center; gap: 10px;
  aspect-ratio: 16 / 9; max-width: 640px;
  background: linear-gradient(135deg, var(--paper-deep), var(--clay-wash));
  border: 1px solid var(--line); border-radius: var(--r-card);
  cursor: pointer;
}
.t-video__play {
  width: 54px; height: 54px; border-radius: 50%;
  background: var(--ink); position: relative;
}
.t-video__play::after {
  content: ""; position: absolute; left: 21px; top: 17px;
  border-left: 14px solid var(--paper); border-top: 10px solid transparent; border-bottom: 10px solid transparent;
}
.t-video__label { font-size: 13px; color: var(--ink-2); }
@media (max-width: 760px) { .t-actions { margin-left: 0; width: 100%; } }

/* 老师视频 */
.t-video__item { margin: 0 0 var(--s-4); }
.t-video__item video { width: 100%; max-width: 640px; border-radius: var(--r-card); border: 1px solid var(--line); background: #000; }
.t-video__item figcaption { font-size: 12px; color: var(--ink-3); margin-top: 6px; }

/* 我关注的老师 */
.follow-grid { display: grid; gap: 10px; max-width: 720px; }
.follow-card {
  display: flex; align-items: center; gap: var(--s-3); justify-content: space-between;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px 16px;
}
.follow-card__main { display: grid; gap: 3px; text-decoration: none; color: inherit; }
.follow-card__main b { font-size: 15px; }

/* 学生作品前后对比 */
.works-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--s-3); }
.work-pair { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); overflow: hidden; }
.work-pair__imgs { display: grid; grid-template-columns: 1fr 1fr; }
.work-pair__imgs img { width: 100%; aspect-ratio: 1; object-fit: cover; display: block; }
.work-pair__imgs figure { margin: 0; position: relative; }
.work-pair__tag {
  position: absolute; top: 6px; left: 6px; font-size: 10.5px; padding: 1px 6px;
  border-radius: 3px; background: rgba(23,20,15,.72); color: var(--paper);
}
.work-pair__cap { padding: 8px 10px; font-size: 12.5px; color: var(--ink-2); }

/* 试看弹层 */
.pv-layer { position: fixed; inset: 0; z-index: 95; }
.pv-scrim { position: absolute; inset: 0; background: rgba(23,20,15,.45); }
.pv-box {
  position: relative; max-width: 760px; margin: 6vh auto 0; max-height: 84vh; overflow: auto;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-3); box-shadow: var(--shadow-3);
}
.pv-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--paper); }
.pv-body { padding: 18px; display: grid; gap: 12px; }
.pv-slide { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 16px 18px; position: relative; }
.pv-slide__n { position: absolute; top: 10px; right: 12px; font-family: var(--font-num); font-size: 11px; color: var(--ink-3); }
.pv-slide h3 { margin: 0 0 8px; font-size: 17px; }
.pv-slide p { margin: 0; font-size: 14px; line-height: 1.7; color: var(--ink-2); }

/* 后台作品缩略 */
.adm-work-imgs { display: flex; gap: 6px; margin-top: 8px; }
.adm-work-imgs img { width: 76px; height: 76px; object-fit: cover; border-radius: 6px; border: 1px solid var(--line); }

/* 画板封面 */
.board-card__cover { display: block; aspect-ratio: 4/3; border-radius: var(--r-2); overflow: hidden; background: var(--paper-deep); margin-bottom: 8px; }
.board-card__cover svg { width: 100%; height: 100%; display: block; }

/* 离线包列表 */
.off-toolbar { display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); margin-bottom: var(--s-4); }
.off-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--s-3); }
.off-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); overflow: hidden; }
.off-card__art { aspect-ratio: 16/9; overflow: hidden; background: var(--paper-deep); }
.off-card__art svg { width: 100%; height: 100%; display: block; }
.off-card__body { padding: 12px 14px 14px; display: grid; gap: 4px; }
.off-card__act { display: flex; gap: 8px; margin-top: 8px; }

/* 教室讲义视图 */
.handout { position: fixed; inset: 0; z-index: 120; }
.handout__scrim { position: absolute; inset: 0; background: rgba(23,20,15,.6); }
.handout__box { position: relative; margin: 4vh auto 0; max-width: 1080px; max-height: 88vh; overflow: auto; background: var(--paper); border-radius: var(--r-3); }
.handout__head { position: sticky; top: 0; display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: var(--paper); border-bottom: 1px solid var(--line); }
.handout__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; padding: 14px; }
.handout__cell { text-align: left; display: grid; gap: 3px; padding: 10px 12px; background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); font: inherit; cursor: pointer; position: relative; }
.handout__cell.is-on { border-color: var(--clay); box-shadow: inset 0 0 0 1px var(--clay); }
.handout__cell b { font-size: 13.5px; }
.handout__n { position: absolute; top: 6px; right: 8px; font-family: var(--font-num); font-size: 10.5px; color: var(--ink-3); }
.handout__k { font-size: 11px; color: var(--ink-3); }
.handout__note { font-size: 11.5px; color: var(--ink-2); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* 课后回看 */
.rp-stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: var(--s-3); margin-bottom: var(--s-5); }
.rp-stat { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px 16px; }
.rp-stat b { display: block; font-family: var(--font-num); font-size: 24px; font-variant-numeric: tabular-nums; }
.rp-stat span { font-size: 11.5px; color: var(--ink-3); }

/* 工作台真实数据条 */
.wb-real { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px 16px; }
.wb-real__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
.wb-real__cell b { display: block; font-family: var(--font-num); font-size: 20px; font-variant-numeric: tabular-nums; }
.wb-real__cell span { font-size: 11px; color: var(--ink-3); }
.wb-real__hint { margin: 12px 0 0; font-size: 13px; color: var(--ink-2); }

/* 工作台区块与行 */
.wb-block { margin: var(--s-5) 0; }
.wb-block__head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); margin-bottom: 10px; }
.wb-table { display: grid; gap: 6px; }
.wb-row {
  display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-2); padding: 10px 14px;
}
.wb-row__main { display: grid; gap: 2px; min-width: 180px; flex: 1; }
.wb-row__main b { font-size: 14px; }
.wb-row__act { display: flex; gap: 6px; flex-wrap: wrap; }
.wb-tag { font-size: 11.5px; padding: 2px 8px; border-radius: var(--r-pill); background: var(--paper-deep); color: var(--ink-2); }
.wb-tag--live { background: var(--sage-wash); color: var(--sage); }
.wb-tag--review { background: var(--ochre-wash); color: #6b4d1c; }
.wb-tag--rejected, .wb-tag--delisted { background: var(--clay-wash); color: var(--clay); }

/* 首页首屏插画 */
/* 首页首屏插画：与 aside 并列，窄屏放到文案上方 */
.hero__grid { display: grid; gap: var(--s-5); }
.hero__art { margin: 0; border-radius: var(--r-3); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow-2); }
.hero__art img, .hero__art video { width: 100%; display: block; aspect-ratio: 3 / 2; object-fit: cover; }
@media (min-width: 960px) {
  .hero__grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); align-items: start; }
  .hero__art { grid-column: 2; grid-row: 1 / span 2; }
  .hero__aside { grid-column: 1; }
}