:root {
  --color-surface: #fdfefd;
  --color-surface-alt: #f3f4f3;
  --color-surface-deep: #e4e6e4;
  --color-ink: #2e3830;
  --color-ink-soft: #546457;
  --color-ink-muted: #6f8172;
  --color-line: #d8dad8;
  --color-primary: #358345;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e1ede3;
  --color-accent: #c931ba;
  --color-accent-ink: #ffffff;
  --color-highlight: #f4d9f1;
  --color-focus: #c922b8;
  --color-contrast-surface: #131c15;
  --color-contrast-ink: #e4e7e5;
  --color-contrast-line: #414943;
  --color-contrast-accent: #d34ac5;
  --overlay-scrim: linear-gradient(180deg, rgba(19, 28, 21, 0.35) 0%, rgba(19, 28, 21, 0.72) 55%, rgba(19, 28, 21, 0.92) 100%);
  --font-heading: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 12.2px;
  --text-sm: 15.2px;
  --text-base: 17px;
  --text-lg: 21.2px;
  --text-xl: 26.6px;
  --text-2xl: 33.2px;
  --text-3xl: 41.5px;
  --text-4xl: 51.9px;
  --text-display: clamp(49px, 10.2vw, 130px);
  --text-figure: clamp(41px, 7.3vw, 94px);
  --weight-heading: 734;
  --weight-body: 400;
  --leading-body: 1.76;
  --leading-heading: 1.27;
  --tracking-heading: 0.001em;
  --radius-sm: 0px;
  --radius-md: 1px;
  --radius-lg: 2px;
  --radius-pill: 2px;
  --border-thin: 1px;
  --border-thick: 2px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1340px;
  --measure: 72ch;
  --gutter: 32px;
  --section-y: 76px;
  --section-y-lg: 106px;
}

/* ============================================================
   贝博体育CN资料索引 · 共享样式 /assets/site.css
   分屏对照：左窄叙事 · 右宽索引 · 直角分界 · 全站零阴影
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

p, figure, blockquote, dl, dd, address { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

img, svg, video { display: block; max-width: 100%; height: auto; }

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

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; padding: 0; cursor: pointer; }

table { border-collapse: collapse; width: 100%; }

:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

::selection {
  background-color: var(--color-highlight);
  color: var(--color-ink);
}

/* ---------- 中文排版与通用字面 ---------- */
.num,
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0;
}

.figure {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.94;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.figure-accent { color: var(--color-accent); }

.eyebrow {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.section-head {
  display: grid;
  gap: var(--space-2);
  padding-block: var(--space-4);
}

/* ---------- 明暗分区与线语言 ---------- */
.on-dark {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.on-dark h1, .on-dark h2, .on-dark h3, .on-dark h4 { color: var(--color-contrast-ink); }
.on-dark .eyebrow { color: var(--color-contrast-accent); }
.on-dark a:hover { color: var(--color-contrast-accent); }
.on-dark .num { color: var(--color-contrast-ink); }

.rule-thick { border-top: var(--border-thick) solid var(--color-ink); }
.rule-thin { border-top: var(--border-thin) solid var(--color-line); }
.rule-double { border-top: calc(var(--border-thin) * 3) double var(--color-line); }

.on-dark .rule-thick { border-top-color: var(--color-contrast-ink); }
.on-dark .rule-thin { border-top-color: var(--color-contrast-line); }
.on-dark .rule-double { border-top-color: var(--color-contrast-line); }

/* ---------- 强调机制 ---------- */
.mark {
  background-image: linear-gradient(var(--color-highlight), var(--color-highlight));
  background-repeat: no-repeat;
  background-size: 100% 0.58em;
  background-position: 0 86%;
  color: inherit;
}

.uline { border-bottom: var(--border-thick) solid var(--color-accent); }
.uline-primary { border-bottom: var(--border-thick) solid var(--color-primary); }

/* ---------- 布局容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-4); }
}

.grid { display: grid; gap: var(--space-4); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

@media (max-width: 899px) {
  .grid-12 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-3); }
}

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: calc(var(--space-8) * -2);
  z-index: 200;
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  transition: top 140ms ease;
}

.skip-link:focus { top: var(--space-2); }

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: var(--border-thick);
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 120;
  pointer-events: none;
}

/* ---------- 头部 ---------- */
.site-header {
  position: relative;
  z-index: 50;
  background-color: var(--color-surface);
}

.header-bar {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--color-surface);
  border-bottom: var(--border-thick) solid var(--color-ink);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-6);
  padding-block: var(--space-3);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.brand-name { font-size: var(--text-xl); color: var(--color-ink); }

.brand-sub {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  padding: 2px var(--space-1);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-md);
}

.brand-tagline {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.02em;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  color: var(--color-ink);
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.nav-toggle:hover { background-color: var(--color-primary-soft); }

.nav-toggle[aria-expanded="true"] {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.nav-toggle-bars { display: block; width: 14px; }
.nav-toggle-bars span { display: block; height: var(--border-thick); background-color: currentColor; }
.nav-toggle-bars span + span { margin-top: 4px; }

.primary-nav { margin-left: auto; }

.nav-list {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-4);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding-block: var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: -0.005em;
  color: var(--color-ink-soft);
  white-space: nowrap;
  transition: color 150ms ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: var(--border-thick);
  background-color: var(--color-accent);
  transition: width 160ms ease;
}

.nav-link:hover { color: var(--color-ink); }
.nav-link:hover::after { width: 100%; }

.nav-link[aria-current="page"] { color: var(--color-ink); }

.nav-link[aria-current="page"]::after {
  width: 100%;
  background-color: var(--color-primary);
}

/* ---------- 赛季阶段时间轴 ---------- */
.season-rail {
  background-color: var(--color-surface-alt);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.season-rail-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-1);
  padding-bottom: var(--space-1);
}

.rail-label {
  flex: 0 0 auto;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.rail-track {
  flex: 1 1 auto;
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.rail-node {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-left: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  white-space: nowrap;
  scroll-snap-align: start;
  transition: background-color 140ms ease, color 140ms ease;
}

.rail-node:first-child { border-left: 0; }
.rail-node:hover { background-color: var(--color-primary-soft); color: var(--color-ink); }

.rail-node[aria-current="true"] {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.rail-idx {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs);
  color: var(--color-accent);
}

.rail-node[aria-current="true"] .rail-idx { color: var(--color-primary-ink); }

.rail-name { font-family: var(--font-heading); font-weight: var(--weight-heading); }

.rail-readout {
  padding-bottom: var(--space-2);
  min-height: calc(var(--text-xs) * 1.6 + var(--space-2));
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 浮动维度切换器 ---------- */
.dim-switcher { display: none; }

@media (min-width: 1200px) {
  .dim-switcher {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    z-index: 70;
    background-color: var(--color-contrast-surface);
    border-left: var(--border-thick) solid var(--color-primary);
    border-top: var(--border-thin) solid var(--color-contrast-line);
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
  }

  .dim-switcher-label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    padding: var(--space-2) var(--space-1);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: 0.2em;
    color: var(--color-contrast-accent);
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
  }

  .dim-btn {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    padding: var(--space-3) var(--space-2);
    font-family: var(--font-heading);
    font-weight: var(--weight-heading);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    color: var(--color-contrast-ink);
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
    transition: background-color 140ms ease, color 140ms ease;
  }

  .dim-btn:last-child { border-bottom: 0; }
  .dim-btn:hover { background-color: var(--color-contrast-line); }

  .dim-btn[aria-pressed="true"] {
    background-color: var(--color-primary);
    color: var(--color-primary-ink);
  }
}

/* ---------- 移动端导航 ---------- */
@media (max-width: 899px) {
  .primary-nav { display: none; margin-left: 0; }

  .primary-nav[data-open="true"] {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background-color: var(--color-contrast-surface);
    border-bottom: var(--border-thick) solid var(--color-primary);
    padding: var(--space-3);
  }

  .primary-nav[data-open="true"] .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .primary-nav[data-open="true"] .nav-link {
    display: block;
    padding-block: var(--space-2);
    font-size: var(--text-lg);
    color: var(--color-contrast-ink);
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
  }

  .primary-nav[data-open="true"] .nav-link::after { display: none; }

  .primary-nav[data-open="true"] .nav-link[aria-current="page"] {
    color: var(--color-contrast-accent);
  }

  .header-inner { position: relative; }
  .brand-tagline { display: none; }
}

@media (min-width: 900px) {
  .nav-toggle { display: none; }
}

/* ---------- 页脚 ---------- */
.site-footer {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thick) solid var(--color-primary);
}

.footer-meta {
  padding-top: var(--space-6);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.footer-meta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .footer-meta-inner {
    grid-template-columns: minmax(0, 2fr) minmax(0, 0.9fr) minmax(0, 1.3fr);
    gap: var(--space-6);
  }
}

.footer-block { min-width: 0; }

.footer-kicker {
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

.footer-note {
  max-width: 60ch;
  font-size: var(--text-xs);
  line-height: 1.8;
  opacity: 0.82;
}

.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
}

.footer-nav-link {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid transparent;
  transition: border-color 150ms ease, color 150ms ease;
}

.footer-nav-link:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.footer-contact {
  display: grid;
  gap: 4px;
  font-style: normal;
  font-size: var(--text-xs);
  line-height: 1.7;
  opacity: 0.82;
}

.footer-contact-line { font-family: var(--font-mono); }
.footer-contact-line:first-child { font-family: var(--font-body); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  padding-block: var(--space-2);
}

.footer-legal-item {
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.58;
}

.footer-legal-item .num { color: inherit; }

.footer-wordmark {
  display: flex;
  justify-content: center;
  padding: var(--space-8) var(--space-3);
  overflow: hidden;
}

.wordmark {
  display: flex;
  align-items: stretch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 0.84;
  letter-spacing: -0.045em;
  color: var(--color-contrast-ink);
  border-bottom: calc(var(--border-thick) * 3) solid var(--color-primary);
}

.wordmark-seg { display: block; padding-inline: 0.05em; }

.wordmark-seg + .wordmark-seg {
  margin-left: 0.06em;
  padding-left: 0.11em;
  border-left: var(--border-thick) solid var(--color-contrast-line);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-sm);
  background-color: transparent;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.btn:hover {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.btn-primary:hover {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-ghost {
  border-color: var(--color-line);
  color: var(--color-ink-soft);
}

.btn-ghost:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-ink);
}

.on-dark .btn {
  border-color: var(--color-contrast-ink);
  color: var(--color-contrast-ink);
}

.on-dark .btn:hover {
  background-color: var(--color-contrast-ink);
  color: var(--color-contrast-surface);
}

.on-dark .btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding-block: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-1); }

.breadcrumb li + li::before {
  content: "/";
  margin-right: var(--space-1);
  color: var(--color-line);
}

.breadcrumb a { transition: color 140ms ease; }

.breadcrumb a:hover {
  color: var(--color-primary);
  border-bottom: var(--border-thin) solid var(--color-primary);
}

/* ---------- 索引列表 ---------- */
.index-list { border-top: var(--border-thick) solid var(--color-ink); }

.index-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-1);
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: background-color 150ms ease;
}

.index-item:hover { background-color: var(--color-primary-soft); }
.index-item-title { font-family: var(--font-heading); font-weight: var(--weight-heading); }
.index-item-meta { font-size: var(--text-xs); color: var(--color-ink-muted); }

/* ---------- 数据表 ---------- */
.data-table {
  width: 100%;
  font-size: var(--text-sm);
  border-top: var(--border-thick) solid var(--color-ink);
}

.data-table th,
.data-table td {
  padding: var(--space-2);
  text-align: left;
  vertical-align: baseline;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.data-table thead th {
  position: sticky;
  top: 0;
  background-color: var(--color-surface-deep);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
}

.data-table tbody tr { transition: background-color 140ms ease; }
.data-table tbody tr:hover { background-color: var(--color-primary-soft); }
.data-table .num { text-align: right; }

.on-dark .data-table { border-top-color: var(--color-contrast-ink); }
.on-dark .data-table th,
.on-dark .data-table td { border-bottom-color: var(--color-contrast-line); }
.on-dark .data-table thead th {
  background-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.on-dark .data-table tbody tr:hover { background-color: rgba(211, 74, 197, 0.14); }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-1);
  border-radius: var(--radius-lg);
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
}

.tag-accent {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.on-dark .tag { background-color: var(--color-contrast-line); color: var(--color-contrast-ink); }

/* ---------- 图片容器（展签式） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background-color: var(--color-surface-deep);
  border-top: var(--border-thick) solid var(--color-ink);
}

.media-frame img,
.media-frame svg {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.media-frame[data-ratio="4x3"] img,
.media-frame[data-ratio="4x3"] svg { aspect-ratio: 4 / 3; }

.media-frame[data-ratio="1x1"] img,
.media-frame[data-ratio="1x1"] svg { aspect-ratio: 1 / 1; }

.media-frame[data-ratio="21x9"] img,
.media-frame[data-ratio="21x9"] svg { aspect-ratio: 21 / 9; }

.media-caption {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 82%;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-xs);
  line-height: 1.55;
}

.media-caption .num { color: var(--color-contrast-accent); }

.media-credit {
  position: absolute;
  right: 0;
  top: 0;
  padding: 2px var(--space-1);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
}

.media-overlay { position: relative; }

.media-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
  pointer-events: none;
}

.media-overlay-text {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  padding: var(--space-3);
  color: var(--color-contrast-ink);
}

.on-dark .media-frame { border-top-color: var(--color-contrast-ink); }

/* ---------- 长文正文 ---------- */
.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.prose p + p { margin-top: var(--space-3); }

.prose h2 {
  margin-top: var(--space-6);
  font-size: var(--text-2xl);
  color: var(--color-ink);
}

.prose h3 {
  margin-top: var(--space-4);
  font-size: var(--text-xl);
  color: var(--color-ink);
}

.prose ul { margin-top: var(--space-2); display: grid; gap: var(--space-1); }

.prose li { position: relative; padding-left: var(--space-3); }

.prose li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

.on-dark .prose { color: var(--color-contrast-ink); }
.on-dark .prose h2, .on-dark .prose h3 { color: var(--color-contrast-ink); }
.on-dark .prose li::before { color: var(--color-contrast-accent); }

/* ---------- 工具类 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.section { padding-block: var(--section-y); }
.section-lg { padding-block: var(--section-y-lg); }

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}