/* ==========================================================================
   天行体育 · 共享样式表 /assets/site.css
   结构：变量 → 重置 → 中文排版 → 页头(轨道+数据条) → 页脚 → 通用组件 → 响应式
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --c-deep: #0B1B33;
  --c-night: #12294A;
  --c-teal: #1F7A8C;
  --c-ice: #9FD3DB;
  --c-orange: #FF5A1F;
  --c-amber: #FFB020;
  --c-silver: #C7CED6;
  --c-alu: #8A94A6;
  --c-snow: #F7F9FC;
  --c-paper: #F1EDE4;
  --c-ink: #101820;

  --rail-w: 240px;
  --wrap: 1320px;
  --gutter: clamp(20px, 4vw, 56px);

  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --line: rgba(199, 206, 214, 0.18);
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, ol, ul, figure, blockquote, dl, dd { margin: 0; }

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

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

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

/* ---------- 3. 中文排版与页面基底 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.78;
  color: var(--c-ink);
  background-color: var(--c-snow);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { line-height: 1.28; font-weight: 800; }

h1 { font-size: clamp(30px, 4.4vw, 46px); }
h2 { font-size: clamp(24px, 3vw, 32px); }
h3 { font-size: clamp(19px, 2.2vw, 24px); }

p { max-width: 720px; }

strong, b { font-weight: 700; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.skew {
  display: inline-block;
  transform: skewX(-6deg);
}

.link-underline {
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 160ms var(--ease);
}

.link-underline:hover,
.link-underline:focus-visible { background-size: 100% 1px; }

#main-content { scroll-margin-top: 24px; }

.nav-locked { overflow: hidden; }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 700;
  color: var(--c-deep);
  background-color: var(--c-orange);
  transform: translateY(-130%);
  transition: transform 160ms var(--ease);
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 页头 ---------- */
.site-header { position: relative; }

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  color: #fff;
  background-color: var(--c-deep);
  border-bottom: 1px solid var(--line);
}

.brand-bar {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: #fff;
}

.brand-bar__mark {
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-ice);
  border: 1px solid rgba(159, 211, 219, 0.5);
  border-radius: 2px;
}

.brand-bar__name { line-height: 1.1; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  border: 1px solid rgba(199, 206, 214, 0.42);
  border-radius: 2px;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.nav-toggle:hover { border-color: var(--c-orange); background-color: rgba(255, 90, 31, 0.14); }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 11px;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(4.5px) 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(-4.5px) rotate(-45deg); }

/* ---------- 6. 页头数据条 ---------- */
.data-strip {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  font-size: 12.5px;
  color: var(--c-silver);
  background-color: var(--c-night);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(159, 211, 219, 0.10) 0 1px,
    transparent 1px 40px
  );
  border-bottom: 1px solid rgba(199, 206, 214, 0.14);
  scrollbar-width: thin;
}

.strip-cell {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding: 10px clamp(14px, 2.2vw, 28px);
  border-right: 1px solid rgba(199, 206, 214, 0.14);
  white-space: nowrap;
}

.strip-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-alu);
  text-transform: uppercase;
}

.strip-val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  font-variant-numeric: tabular-nums;
}

.strip-val--hot { color: var(--c-orange); }

.strip-chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--c-ice);
  border: 1px solid rgba(159, 211, 219, 0.35);
  border-radius: 2px;
  font-variant-numeric: tabular-nums;
}

.strip-chip b {
  margin-right: 6px;
  font-weight: 700;
  color: var(--c-amber);
}

.strip-note {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  max-width: none;
  margin-left: auto;
  padding: 10px clamp(14px, 2.2vw, 28px);
  font-size: 11.5px;
  color: var(--c-alu);
  white-space: nowrap;
}

/* ---------- 7. 侧轨导航（移动端抽屉） ---------- */
.side-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 220;
  display: flex;
  flex-direction: column;
  width: min(304px, 86vw);
  overflow-y: auto;
  color: #fff;
  background-color: var(--c-deep);
  border-right: 1px solid var(--line);
  box-shadow: 28px 0 64px rgba(11, 27, 51, 0.42);
  transform: translateX(-102%);
  visibility: hidden;
  transition: transform 280ms var(--ease), visibility 280ms var(--ease);
}

.side-rail[data-open] {
  transform: translateX(0);
  visibility: visible;
}

.rail-brand {
  display: block;
  padding: 24px 22px 20px;
  border-bottom: 1px solid var(--line);
}

.rail-brand__mark {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-ice);
}

.rail-brand__name {
  display: block;
  font-size: 25px;
  font-weight: 800;
  letter-spacing: 0.05em;
  line-height: 1.2;
  color: #fff;
}

.rail-brand__tag {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.62;
  color: var(--c-alu);
}

.rail-list {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  padding: 16px 0;
}

.rail-item { display: block; }

.rail-link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 22px 13px 19px;
  color: var(--c-silver);
  border-left: 3px solid transparent;
  transition: background-color 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.rail-link:hover,
.rail-link:focus-visible {
  color: #fff;
  background-color: rgba(31, 122, 140, 0.26);
  border-left-color: var(--c-teal);
}

.rail-link[aria-current="page"] {
  color: var(--c-deep);
  background-color: var(--c-orange);
  border-left-color: var(--c-amber);
}

.rail-link[aria-current="page"] .rail-num { color: rgba(16, 24, 32, 0.62); }

.rail-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-alu);
  transition: color 160ms var(--ease);
}

.rail-label {
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.4;
}

.rail-foot {
  padding: 20px 22px 26px;
  border-top: 1px solid var(--line);
}

.rail-cta { width: 100%; }

.rail-meta {
  margin-top: 14px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--c-alu);
}

.rail-scrim {
  position: fixed;
  inset: 0;
  z-index: 210;
  background-color: rgba(11, 27, 51, 0.64);
  opacity: 0;
  visibility: hidden;
  transition: opacity 240ms var(--ease), visibility 240ms var(--ease);
}

.rail-scrim[data-open] {
  opacity: 1;
  visibility: visible;
}

/* ---------- 8. 阅读进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 240;
  width: 100%;
  height: 3px;
  background-color: var(--c-orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  opacity: 0;
  transition: opacity 200ms var(--ease);
  pointer-events: none;
}

.scroll-progress[data-active] { opacity: 1; }

/* ---------- 9. 页脚 ---------- */
.site-footer {
  padding: 56px 0 30px;
  color: var(--c-silver);
  background-color: var(--c-deep);
  border-top: 1px solid var(--line);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(159, 211, 219, 0.06) 0 1px,
    transparent 1px 48px
  );
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 1.15fr) minmax(0, 2.6fr);
  gap: 44px;
}

.footer-brand__name {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #fff;
}

.footer-brand__line {
  margin-top: 8px;
  max-width: 320px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--c-ice);
}

.footer-brand__note {
  margin-top: 16px;
  max-width: 380px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-alu);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px 24px;
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-ice);
}

.footer-list { display: flex; flex-direction: column; gap: 9px; }

.footer-link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-silver);
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: color 160ms var(--ease), background-size 160ms var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: #fff;
  background-size: 100% 1px;
}

.footer-base {
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
}

.footer-contact__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--c-silver);
}

.footer-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-alu);
}

.footer-value {
  color: #fff;
  font-variant-numeric: tabular-nums;
}

.copy-btn {
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-ice);
  border: 1px solid rgba(159, 211, 219, 0.38);
  border-radius: 2px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.copy-btn:hover {
  color: var(--c-deep);
  background-color: var(--c-ice);
  border-color: var(--c-ice);
}

.copy-btn[data-copied] {
  color: var(--c-deep);
  background-color: var(--c-amber);
  border-color: var(--c-amber);
}

.copy-btn[data-copied="fail"] {
  background-color: var(--c-silver);
  border-color: var(--c-silver);
}

.footer-note {
  margin-top: 14px;
  max-width: 760px;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--c-alu);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin-top: 22px;
  font-size: 12.5px;
  color: var(--c-alu);
}

.footer-copy { font-family: var(--font-mono); letter-spacing: 0.04em; }

.footer-icp { font-family: var(--font-mono); letter-spacing: 0.04em; }

.footer-legal__link {
  color: var(--c-silver);
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: color 160ms var(--ease), background-size 160ms var(--ease);
}

.footer-legal__link:hover,
.footer-legal__link:focus-visible {
  color: #fff;
  background-size: 100% 1px;
}

/* ---------- 10. 通用容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid { display: grid; gap: 24px; }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* ---------- 11. 主题带 / 说明牌 / 标签 ---------- */
.band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 48px;
  padding: 0 clamp(16px, 2.4vw, 28px);
  color: #fff;
  background-color: var(--c-deep);
  border-left: 6px solid var(--c-orange);
}

.band__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-ice);
}

.band__name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.plate {
  padding: 18px 20px;
  background-color: var(--c-paper);
  border: 1px solid var(--c-silver);
  border-radius: 2px;
  box-shadow: 6px 6px 0 -1px rgba(199, 206, 214, 0.6);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), border-color 180ms var(--ease);
}

.plate:hover {
  transform: translateY(-4px);
  border-color: var(--c-orange);
  box-shadow: 6px 6px 0 -1px rgba(255, 90, 31, 0.28);
}

.plate__key {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--c-teal);
}

.plate__title {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}

.plate__text {
  margin-top: 8px;
  max-width: none;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--c-night);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-teal);
  background-color: var(--c-paper);
  border: 1px solid var(--c-silver);
  border-radius: 2px;
  transition: background-color 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.tag:hover {
  color: #fff;
  background-color: var(--c-deep);
  border-color: var(--c-deep);
}

.tag--hot {
  color: var(--c-orange);
  border-color: rgba(255, 90, 31, 0.5);
}

.tag--hot:hover {
  color: var(--c-deep);
  background-color: var(--c-orange);
  border-color: var(--c-orange);
}

/* ---------- 12. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-align: center;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background-color 160ms var(--ease), color 160ms var(--ease),
              border-color 160ms var(--ease), transform 120ms var(--ease);
}

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

.btn--accent {
  color: var(--c-deep);
  background-color: var(--c-orange);
}

.btn--accent:hover,
.btn--accent:focus-visible { background-color: var(--c-amber); }

.btn--ghost {
  color: var(--c-ink);
  background-color: transparent;
  border-color: var(--c-silver);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  color: var(--c-orange);
  background-color: rgba(255, 90, 31, 0.07);
  border-color: var(--c-orange);
}

.btn--rail {
  color: #fff;
  background-color: var(--c-teal);
}

.btn--rail:hover,
.btn--rail:focus-visible {
  color: var(--c-deep);
  background-color: var(--c-ice);
}

/* ---------- 13. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--c-alu);
}

.breadcrumbs a {
  color: var(--c-teal);
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 160ms var(--ease);
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible { background-size: 100% 1px; }

.breadcrumbs__sep { color: var(--c-silver); }

.breadcrumbs__current { color: var(--c-ink); }

/* ---------- 14. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background-color: var(--c-night);
  border: 1px solid var(--c-silver);
  border-radius: 2px;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-caption {
  margin-top: 10px;
  max-width: none;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-alu);
}

/* ---------- 15. 折叠与表格 ---------- */
.fold {
  border-bottom: 1px solid var(--c-silver);
}

.fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.fold__summary::-webkit-details-marker { display: none; }

.fold__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-orange);
  transition: transform 160ms var(--ease);
}

.fold[open] .fold__summary::after { transform: rotate(45deg); }

.fold__body {
  padding: 0 4px 18px;
  font-size: 15.5px;
  line-height: 1.8;
}

.data-table {
  width: 100%;
  font-size: 14.5px;
  font-variant-numeric: tabular-nums;
}

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

.data-table th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--c-ice);
  background-color: var(--c-night);
}

.data-table tbody tr:nth-child(even) { background-color: rgba(159, 211, 219, 0.14); }

/* ---------- 16. 响应式 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }

  .header-bar { display: none; }

  .rail-scrim { display: none; }

  .side-rail {
    width: var(--rail-w);
    transform: none;
    visibility: visible;
    box-shadow: none;
    transition: none;
  }
}

@media (max-width: 1023px) {
  .grid--7-5,
  .grid--8-4,
  .grid--3,
  .grid--2 { grid-template-columns: minmax(0, 1fr); }

  .footer-top { grid-template-columns: minmax(0, 1fr); gap: 36px; }

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

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

@media (max-width: 640px) {
  body { font-size: 16.5px; }

  .strip-note { margin-left: 0; }

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

  .footer-contact { flex-direction: column; align-items: flex-start; gap: 12px; }

  .btn { padding: 12px 18px; }
}

@media (max-width: 420px) {
  .nav-toggle__text { display: none; }
}

/* ---------- 17. 减少动态效果 ---------- */
@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;
  }

  .plate:hover { transform: none; }
}