/* =============================================================
   免费体育通 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================= */

:root {
  --bg: #061A16;
  --panel: #0D2A24;
  --line: #17423A;
  --cyan: #2BF0CE;
  --teal: #12A98F;
  --orange: #FF8C3B;
  --amber: #F3C24B;
  --violet: #7C86F0;
  --ink: #EAF6F2;
  --muted: #9AB5AE;

  --shell: 1280px;
  --gutter: clamp(16px, 4vw, 40px);

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;

  --font-display: "Oswald", "Archivo Narrow", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  --ease: cubic-bezier(.22, .68, .32, 1);
  --dur: .24s;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 118px;
}

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 520px at 84% -12%, rgba(43, 240, 206, .09), transparent 62%),
    radial-gradient(720px 460px at 2% 6%, rgba(124, 134, 240, .08), transparent 60%),
    repeating-linear-gradient(90deg, rgba(23, 66, 58, .22) 0 1px, transparent 1px 96px);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
}

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

button { font: inherit; color: inherit; }

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

a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: var(--cyan); color: #04211B; }

/* ---------- 中文排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 .5em;
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 92%;
  letter-spacing: -.02em;
  line-height: 1.14;
  color: var(--ink);
  text-wrap: balance;
}

h1 { font-size: clamp(38px, 6.4vw, 72px); }
h2 { font-size: clamp(26px, 3.6vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 28px); }

p { margin: 0 0 1.15em; }

.num,
[data-year],
.timecode {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.note,
.anno {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ---------- 结构容器 ---------- */
.shell {
  width: min(100% - (2 * var(--gutter)), var(--shell));
  margin-inline: auto;
}

.section {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
}

.section--tight { padding: clamp(32px, 4vw, 56px) 0; }

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 26px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: 14px;
  top: -80px;
  z-index: 140;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--cyan);
  color: #04211B;
  font-size: 14px;
  text-decoration: none;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus { top: 14px; }

/* =============================================================
   头部 · 紧凑命令栏
   ============================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(6, 26, 22, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-rail {
  border-bottom: 1px solid var(--line);
  max-height: 36px;
  overflow: hidden;
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.header-rail__inner {
  width: min(100% - (2 * var(--gutter)), var(--shell));
  margin-inline: auto;
  height: 36px;
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
  white-space: nowrap;
}

.header-rail__region { color: var(--cyan); }

.header-rail__where {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--orange);
}

.header-rail__where::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 8px var(--orange);
}

.header-rail__where[hidden] { display: none; }

.header-rail__season { color: var(--ink); }

.header-rail__code { margin-left: auto; }

.header-bar {
  width: min(100% - (2 * var(--gutter)), var(--shell));
  margin-inline: auto;
  min-height: 66px;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  padding: 8px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  flex: 0 0 auto;
}

.brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: linear-gradient(150deg, var(--cyan), var(--teal));
  color: #03211B;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.02em;
  box-shadow: 0 0 0 1px rgba(43, 240, 206, .35), 0 10px 26px -14px rgba(43, 240, 206, .9);
}

.brand__text { display: block; line-height: 1.25; }

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .04em;
}

.brand__tagline {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--muted);
}

/* 主导航 */
.site-nav { margin-left: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 13px;
  border-radius: var(--radius-pill);
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--teal);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--ink);
  background: rgba(23, 66, 58, .55);
}

.site-nav__link[aria-current="page"] {
  color: var(--ink);
  background: rgba(43, 240, 206, .1);
  padding-left: 22px;
}

.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  transform: translateY(-50%);
}

.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--cyan); }

/* 右侧动作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  white-space: nowrap;
}

.status-chip__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 9px var(--amber);
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(13, 42, 36, .7);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: .08em;
  cursor: pointer;
}

.nav-toggle__lines {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__lines i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-header[data-open="true"] .nav-toggle__lines i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__lines i:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__lines i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 滚动进度线 */
.header-progress {
  height: 2px;
  background: rgba(23, 66, 58, .6);
  overflow: hidden;
}

.header-progress__fill {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--teal), var(--cyan) 55%, var(--orange));
}

/* 收起态 */
.site-header.is-condensed .header-rail {
  max-height: 0;
  opacity: 0;
  border-bottom-color: transparent;
}

.site-header.is-condensed .brand__tagline { display: none; }

/* =============================================================
   页脚
   ============================================================= */
.site-footer {
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(40px, 5vw, 64px) 0 28px;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(13, 42, 36, .85), rgba(6, 26, 22, .2) 45%),
    repeating-linear-gradient(90deg, rgba(23, 66, 58, .2) 0 1px, transparent 1px 64px);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) repeat(4, minmax(112px, 1fr));
  gap: clamp(20px, 3vw, 36px);
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.brand--footer { margin-bottom: 16px; }

.footer-intro {
  max-width: 30ch;
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 12px;
}

.footer-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--teal);
}

.footer-col__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--muted);
  text-transform: uppercase;
}

.footer-col__list { list-style: none; }

.footer-col__list li + li { margin-top: 7px; }

.footer-link {
  color: var(--ink);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.footer-contact {
  margin: 24px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.9;
  color: var(--muted);
}

.footer-rule {
  position: relative;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.footer-rule__ticks {
  position: absolute;
  top: -9px;
  left: 0;
  right: 0;
  height: 8px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 14px);
  pointer-events: none;
}

.footer-legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
}

/* =============================================================
   通用组件
   ============================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .06em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn--primary {
  background: var(--cyan);
  color: #03211B;
  font-weight: 700;
}

.btn--primary:hover,
.btn--primary:focus-visible { background: #6BFFE6; }

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--accent {
  background: var(--orange);
  color: #261200;
  font-weight: 700;
}

.btn--accent:hover,
.btn--accent:focus-visible { background: #FFA461; }

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

.to-top { min-width: 118px; }

/* 面板 / 卡片 */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: clamp(16px, 2vw, 24px);
}

.card {
  position: relative;
  background: linear-gradient(160deg, rgba(13, 42, 36, .95), rgba(6, 26, 22, .9));
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: clamp(16px, 2vw, 24px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.card:hover { border-color: rgba(43, 240, 206, .45); }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  white-space: nowrap;
}

.tag--live { color: var(--amber); border-color: rgba(243, 194, 75, .45); }
.tag--archive { color: var(--violet); border-color: rgba(124, 134, 240, .45); }
.tag--check { color: var(--orange); border-color: rgba(255, 140, 59, .45); }

/* 框景首屏 */
.frame {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, rgba(13, 42, 36, .92), rgba(6, 26, 22, .78));
  padding: clamp(22px, 4vw, 56px);
}

.frame__ticks {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 12px);
  pointer-events: none;
}

.frame__ticks--top { top: -3px; }
.frame__ticks--bottom { bottom: -3px; }

.frame__vnote {
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%) rotate(90deg);
  transform-origin: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .28em;
  color: var(--muted);
  white-space: nowrap;
  pointer-events: none;
}

/* 编号章节 */
.chapter {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 32px);
  align-items: end;
  margin-bottom: clamp(20px, 3vw, 34px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.chapter__num {
  font-family: var(--font-mono);
  font-size: clamp(42px, 7vw, 82px);
  line-height: .84;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--line);
}

.chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 40px);
  letter-spacing: -.01em;
}

.chapter__sub {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
}

[data-section].is-current > .chapter { border-bottom-color: rgba(43, 240, 206, .55); }
[data-section].is-current .chapter__num { -webkit-text-stroke-color: rgba(43, 240, 206, .55); }

/* 轨道 / 抽屉 / 对照表的通用底座 */
.track {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px 14px;
  scroll-snap-type: x proximity;
  scrollbar-color: var(--line) transparent;
  cursor: grab;
}

.track > * { scroll-snap-align: start; flex: 0 0 auto; }
.track.is-dragging { cursor: grabbing; user-select: none; }
.track.is-dragging * { pointer-events: none; }

.drawer {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  overflow: hidden;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.table th,
.table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.table th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--muted);
  text-transform: uppercase;
}

/* 图片容器基础规则 */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(18, 169, 143, .18), rgba(6, 26, 22, .9)),
    repeating-linear-gradient(90deg, rgba(23, 66, 58, .5) 0 1px, transparent 1px 32px);
}

.media > img,
.media > picture img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }

.media__overlay {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(23, 66, 58, .55) 0 1px, transparent 1px 30px),
    repeating-linear-gradient(0deg, rgba(23, 66, 58, .4) 0 1px, transparent 1px 30px);
  pointer-events: none;
}

.media__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* 面包屑 / 页面标题 / 正文 */
.crumbs {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
}

.crumbs li { display: inline-flex; align-items: center; gap: 6px; }

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

.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--ink); }

.page-head {
  position: relative;
  padding: clamp(34px, 5vw, 64px) 0 clamp(20px, 3vw, 34px);
  border-bottom: 1px solid var(--line);
}

.page-head__kicker {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--teal);
  text-transform: uppercase;
}

.page-head__title { margin: 0 0 14px; }

.page-head__lead {
  max-width: 40ch;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.prose { max-width: 40em; }

.prose p { max-width: 38em; }

.prose h2,
.prose h3 { margin-top: 1.6em; }

.prose ul,
.prose ol {
  margin: 0 0 1.3em;
  padding-left: 1.3em;
}

.prose li { margin-bottom: .5em; }

.prose strong { color: var(--cyan); font-weight: 600; }

/* =============================================================
   响应式
   ============================================================= */
@media (max-width: 1080px) {
  .header-bar { flex-wrap: nowrap; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 95;
    display: none;
    margin: 0;
    padding: 104px var(--gutter) 48px;
    background: rgba(6, 26, 22, .985);
    overflow-y: auto;
  }

  .site-header[data-open="true"] .site-nav { display: block; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    border-top: 1px solid var(--line);
    padding-top: 18px;
  }

  .site-nav__link {
    font-size: 22px;
    padding: 14px 12px;
    border-radius: var(--radius-sm);
  }

  .site-nav__idx { font-size: 12px; }

  .site-nav__link[aria-current="page"] { padding-left: 30px; }
  .site-nav__link[aria-current="page"]::before { left: 12px; width: 8px; height: 8px; }

  .status-chip { display: none; }

  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--asym { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 1000px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }

  .header-rail__code { display: none; }

  .brand__tagline { display: none; }

  .brand__name { font-size: 18px; }

  .brand__mark { width: 36px; height: 36px; border-radius: 11px; font-size: 13px; }

  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .chapter { grid-template-columns: minmax(0, 1fr); align-items: start; gap: 8px; }

  .frame__vnote { display: none; }

  .footer-rule { justify-content: flex-start; }
}

@media (max-width: 520px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .to-top { width: 100%; }
}

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

  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .track { scroll-behavior: auto; }
}