/* ==========================================================================
   安博赛场 · 共享外壳样式 /assets/site.css
   覆盖：reset、变量、中文排版、共享头部与页脚、通用按钮、面包屑、
        正文容器、栅格、卡片、图片容器、展开组、动效降级
   ========================================================================== */

:root {
  --color-surface: #fafbfb;
  --color-surface-alt: #f1f2f2;
  --color-surface-deep: #e3e6e6;
  --color-ink: #3e4a4c;
  --color-ink-soft: #617275;
  --color-ink-muted: #75878a;
  --color-line: #d8dbdc;
  --color-primary: #537d83;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e3e9ea;
  --color-accent: #268267;
  --color-accent-ink: #ffffff;
  --color-highlight: #d4e5e0;
  --color-focus: #1b7e61;
  --color-contrast-surface: #161a1b;
  --color-contrast-ink: #e4e6e7;
  --color-contrast-line: #434748;
  --color-contrast-accent: #3ac59d;
  --overlay-scrim: linear-gradient(180deg, rgba(22, 26, 27, 0.35) 0%, rgba(22, 26, 27, 0.72) 55%, rgba(22, 26, 27, 0.92) 100%);
  --font-heading: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 11.4px;
  --text-sm: 14.3px;
  --text-base: 16px;
  --text-lg: 20.0px;
  --text-xl: 25.0px;
  --text-2xl: 31.2px;
  --text-3xl: 39.1px;
  --text-4xl: 48.8px;
  --text-display: clamp(34px, 7.0vw, 90px);
  --text-figure: clamp(29px, 5.1vw, 65px);
  --weight-heading: 647;
  --weight-body: 400;
  --leading-body: 1.87;
  --leading-heading: 1.29;
  --tracking-heading: 0.008em;
  --radius-sm: 18px;
  --radius-md: 20px;
  --radius-lg: 23px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(62, 74, 76, 0.08);
  --shadow-2: 0 18px 44px rgba(62, 74, 76, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1200px;
  --measure: 70ch;
  --gutter: 16px;
  --section-y: 95px;
  --section-y-lg: 133px;
}

/* --------------------------------------------------------------------------
   1. Reset
   -------------------------------------------------------------------------- */

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

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

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

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);
  color: var(--color-ink);
}

p { margin: 0; }

ul, ol { margin: 0; padding: 0; }

a { color: var(--color-primary); text-decoration: none; }

a:hover { color: var(--color-accent); }

button { font-family: inherit; }

img, svg, video { max-width: 100%; }

figure { margin: 0; }

main { display: block; }

[hidden] { display: none !important; }

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

#main-content { scroll-margin-top: 150px; }

/* --------------------------------------------------------------------------
   2. 中文排版与工具类
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.prose {
  max-width: var(--measure);
  color: var(--color-ink);
}

.prose > * + * { margin-top: var(--space-2); }

.prose h2,
.prose h3 { margin-top: var(--space-4); }

.prose ul,
.prose ol { padding-inline-start: 1.3em; }

.prose li + li { margin-top: 6px; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.num,
.tick-scale,
.stat-figure,
.chapter-num,
.footer-col-num,
.footer-icp {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.num {
  font-size: 0.95em;
  font-weight: 500;
  letter-spacing: 0.01em;
  padding-inline-end: 8px;
}

.display-xl {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.figure-xl {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--color-primary);
  display: inline-block;
  padding-inline-end: 8px;
}

/* 刻度尺：以短刻度代替长横线做分隔 */
.tick-scale {
  display: block;
  width: 104px;
  height: 10px;
  margin: var(--space-2) 0;
  background-image: repeating-linear-gradient(
    to right,
    var(--color-line) 0,
    var(--color-line) 1px,
    transparent 1px,
    transparent 8px
  );
  background-repeat: repeat-x;
  background-position: 0 bottom;
}

.tick-scale--wide { width: 220px; }

.tick-scale--contrast {
  background-image: repeating-linear-gradient(
    to right,
    var(--color-contrast-line) 0,
    var(--color-contrast-line) 1px,
    transparent 1px,
    transparent 8px
  );
}

/* --------------------------------------------------------------------------
   3. 分区底色轮换与卡纸块
   -------------------------------------------------------------------------- */

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

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

.section--tight { padding-block: var(--space-6); }

.section--alt { background-color: var(--color-surface-alt); }

.section--deep { background-color: var(--color-surface-deep); }

.section--contrast {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.section--contrast h1,
.section--contrast h2,
.section--contrast h3,
.section--contrast h4 { color: var(--color-contrast-ink); }

.section--contrast .chapter-num { color: var(--color-contrast-accent); }

.section--contrast .chapter-desc,
.section--contrast .prose { color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent); }

.section--contrast a { color: var(--color-contrast-accent); }

.slab {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  padding: var(--space-4);
}

.slab--alt {
  background-color: var(--color-surface-alt);
  box-shadow: none;
}

.slab--deep {
  background-color: var(--color-surface-deep);
  box-shadow: none;
}

/* --------------------------------------------------------------------------
   4. 编号章节体系
   -------------------------------------------------------------------------- */

.chapter { position: relative; }

.chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-3);
  margin-bottom: var(--space-4);
}

.chapter-num {
  font-size: var(--text-2xl);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  display: inline-block;
  padding-inline-end: 8px;
}

.chapter-title {
  font-size: var(--text-2xl);
  margin: 0;
  flex: 1 1 16ch;
  min-width: 12ch;
}

.chapter-desc {
  flex: 1 1 40ch;
  min-width: 20ch;
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

/* --------------------------------------------------------------------------
   5. 栅格
   -------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--space-3);
}

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

.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)); }

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

@media (max-width: 1000px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3,
  .col-4 { grid-column: span 3; }
  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-12 { grid-column: span 6; }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--12 { grid-template-columns: minmax(0, 1fr); }
  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-12 { grid-column: span 1; }
}

/* --------------------------------------------------------------------------
   6. 按钮
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 11px 20px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:active { transform: translateY(1px); }

.btn--sm { padding: 8px 16px; font-size: var(--text-xs); }

.btn--lg {
  padding: 15px 28px;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

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

.btn--primary:hover {
  color: var(--color-primary-ink);
  background-color: color-mix(in srgb, var(--color-primary) 84%, var(--color-contrast-surface));
}

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

.btn--accent:hover {
  color: var(--color-accent-ink);
  background-color: color-mix(in srgb, var(--color-accent) 85%, var(--color-contrast-surface));
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-ink);
  border-color: color-mix(in srgb, var(--color-ink) 22%, transparent);
}

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

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

.btn--contrast:hover {
  color: var(--color-contrast-ink);
  background-color: color-mix(in srgb, var(--color-contrast-surface) 82%, var(--color-primary));
}

.btn-arrow {
  display: inline-block;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
  opacity: 0.92;
}

/* --------------------------------------------------------------------------
   7. 状态徽标
   -------------------------------------------------------------------------- */

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.6;
  white-space: nowrap;
}

.status-chip--ok {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.status-chip--backup {
  background-color: var(--color-highlight);
  color: var(--color-ink);
}

.status-chip--pending {
  background-color: var(--color-surface-deep);
  color: var(--color-ink-soft);
}

.status-chip--contrast {
  background-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

/* --------------------------------------------------------------------------
   8. 说明牌卡片
   -------------------------------------------------------------------------- */

.plaque {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  height: 100%;
  padding: var(--space-3);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.plaque-label {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
}

.plaque-body {
  margin: 0;
  color: var(--color-ink);
}

.plaque-note {
  margin: 0;
  margin-top: auto;
  padding-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* --------------------------------------------------------------------------
   9. 图片容器（统一比例裁切，页面阶段放 <img>）
   -------------------------------------------------------------------------- */

.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
}

.media > img,
.media > picture > img,
.media > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }

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

.media-caption {
  position: absolute;
  inset-inline: var(--space-3);
  bottom: var(--space-3);
  margin: 0;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.media-tag {
  position: absolute;
  top: var(--space-2);
  inset-inline-start: var(--space-2);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   10. 面包屑
   -------------------------------------------------------------------------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--color-line);
}

.breadcrumb-link {
  color: var(--color-ink-soft);
  text-decoration: none;
}

.breadcrumb-link:hover { color: var(--color-primary); }

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

/* --------------------------------------------------------------------------
   11. 原地展开内容组
   -------------------------------------------------------------------------- */

.disclosure {
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: background-color 0.24s ease;
}

.disclosure + .disclosure { margin-top: var(--space-1); }

.disclosure-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 0;
  background-color: transparent;
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-ink);
  text-align: start;
  cursor: pointer;
  transition: background-color 0.24s ease;
}

.disclosure-icon {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1;
  transition: transform 0.24s ease, background-color 0.24s ease, color 0.24s ease;
}

.disclosure[data-open="true"] { background-color: var(--color-primary-soft); }

.disclosure[data-open="true"] .disclosure-icon {
  transform: rotate(45deg);
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.disclosure-panel {
  padding: 0 var(--space-3) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* --------------------------------------------------------------------------
   12. 跳过链接 / 滚动进度 / 显现
   -------------------------------------------------------------------------- */

.skip-link {
  position: fixed;
  top: var(--space-1);
  left: var(--space-1);
  z-index: 300;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
  color: var(--color-contrast-ink);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-color: var(--color-accent);
  pointer-events: none;
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.42s ease, transform 0.42s ease;
}

html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   13. 共享头部
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--color-surface);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--color-ink) 7%, transparent);
}

.header-bar { background-color: var(--color-surface); }

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--color-ink);
  text-decoration: none;
}

.brand:hover { color: var(--color-ink); }

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: calc(var(--radius-sm) / 2);
  background-color: var(--color-primary);
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: calc(var(--radius-sm) / 3);
  background-color: var(--color-surface);
}

.brand-mark::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background-color: var(--color-contrast-accent);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.brand-sub {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.primary-nav {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 0 0 auto;
}

.drawer-toggle,
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1.6;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.drawer-toggle:hover,
.nav-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.drawer-toggle-dot {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent);
}

.nav-toggle { display: none; }

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 第一栏多联赛入口横条 */

.league-bar {
  background-color: var(--color-surface-alt);
}

.league-bar-inner {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-block: 10px;
}

.league-sort {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
}

.league-sort-label {
  margin-inline-end: 2px;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.sort-btn {
  padding: 5px 12px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1.6;
  cursor: pointer;
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

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

.sort-btn[aria-pressed="true"] {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-surface);
}

.league-scroll {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.league-scroll::-webkit-scrollbar { display: none; }

.league-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.league-item { flex: 0 0 auto; }

.league-chip {
  display: inline-block;
  padding: 5px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 400;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.league-chip:hover {
  background-color: var(--color-highlight);
  color: var(--color-ink);
  border-color: var(--color-highlight);
}

/* 数据面板抽屉 */

.data-drawer {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: none;
}

.data-drawer[data-open="true"] {
  display: grid;
  justify-items: center;
  align-content: start;
  padding: var(--space-3);
  overflow-y: auto;
}

.drawer-scrim {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--color-contrast-surface) 68%, transparent);
  cursor: pointer;
}

.drawer-panel {
  position: relative;
  width: min(720px, 100%);
  margin-top: var(--space-6);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}

.drawer-head { position: relative; padding-inline-end: 44px; }

.drawer-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.drawer-title {
  margin: 6px 0 0;
  font-size: var(--text-xl);
  color: var(--color-contrast-ink);
}

.drawer-close {
  position: absolute;
  top: 0;
  right: 0;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-contrast-ink);
  font-size: var(--text-lg);
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.drawer-close:hover {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.drawer-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
}

.stat-item {
  display: grid;
  gap: 4px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  background-color: color-mix(in srgb, var(--color-contrast-ink) 8%, transparent);
}

.stat-figure {
  font-size: var(--text-2xl);
  font-weight: 500;
  line-height: 1;
  color: var(--color-contrast-accent);
  display: inline-block;
  padding-inline-end: 8px;
}

.stat-label {
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

.drawer-note {
  margin: var(--space-3) 0 0;
  max-width: 62ch;
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
}

.drawer-foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.drawer-panel .btn--ghost {
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-line);
}

.drawer-panel .btn--ghost:hover {
  color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

/* --------------------------------------------------------------------------
   14. 共享页脚
   -------------------------------------------------------------------------- */

.site-footer {
  margin-top: var(--section-y);
  background-color: var(--color-surface-alt);
  border-start-start-radius: var(--radius-lg);
  border-start-end-radius: var(--radius-lg);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: var(--space-6);
  padding-block: var(--section-y) var(--space-6);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

.footer-brand-note {
  margin: 0;
  max-width: 34ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.footer-index {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.footer-col-title {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-ink);
}

.footer-col-num {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
}

.footer-list {
  display: grid;
  gap: 10px;
  list-style: none;
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover { color: var(--color-primary); }

.footer-legal {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-3);
}

.footer-legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent);
}

.footer-icp {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
}

.footer-contact,
.footer-copy { margin: 0; }

/* --------------------------------------------------------------------------
   15. 响应式：平板与手机
   -------------------------------------------------------------------------- */

@media (max-width: 1000px) {
  :root {
    --section-y: 72px;
    --section-y-lg: 96px;
  }

  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-4);
    padding-block: var(--section-y) var(--space-4);
  }

  .footer-index { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    top: calc(100% + var(--space-1));
    left: 0;
    right: 0;
    z-index: 70;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
    margin-inline-start: 0;
    padding: var(--space-2);
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2);
  }

  .primary-nav[data-open="true"] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    display: block;
    padding: 13px 16px;
    font-size: var(--text-base);
    border-radius: var(--radius-md);
  }

  .header-inner { gap: var(--space-2); }
}

@media (max-width: 700px) {
  .container { padding-inline: var(--space-2); }

  .brand-sub { display: none; }

  .drawer-toggle-text { display: none; }

  .drawer-toggle { padding: 8px 11px; }

  .league-bar-inner {
    gap: var(--space-1);
    padding-block: 6px;
  }

  .league-sort-label { display: none; }

  .sort-btn { padding: 4px 10px; }

  .league-chip {
    padding: 4px 12px;
    font-size: var(--text-xs);
  }

  .footer-index { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .drawer-stats { grid-template-columns: minmax(0, 1fr); }

  .drawer-panel {
    margin-top: var(--space-3);
    padding: var(--space-3);
  }

  .slab { padding: var(--space-3); }

  .chapter-num { font-size: var(--text-xl); }

  .chapter-title { font-size: var(--text-xl); }
}

@media (max-width: 520px) {
  .footer-index { grid-template-columns: minmax(0, 1fr); }

  .footer-legal-inner { flex-direction: column; align-items: flex-start; }

  .brand-name { font-size: var(--text-base); }
}

/* --------------------------------------------------------------------------
   16. 动效降级
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .btn:hover .btn-arrow { transform: none; }
}