/* =========================================================
   FB体育 · 共享外壳样式 /assets/site.css
   设计基线：夜间转播数据墙 + 战术板切角
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

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

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

img, svg, video, canvas { 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; border-spacing: 0; }

[hidden] { display: none !important; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --ink: #0B0E13;
  --board: #101C33;
  --cobalt: #1F5BFF;
  --cyan: #35E6D8;
  --orange: #FF6A2B;
  --white: #F4F7FC;
  --mist: #8FA0B8;
  --steel: #243040;
  --red: #FF3B5C;
  --lime: #7BE04A;

  --rail-w: 88px;
  --top-gap: 96px;
  --shell: 1400px;
  --pad: clamp(16px, 3vw, 40px);
  --chamfer: 12px;
  --cut: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));

  --font-head: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  padding-left: var(--rail-w);
  padding-top: var(--top-gap);
  color: var(--white);
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(36, 48, 64, 0.34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 48, 64, 0.34) 1px, transparent 1px);
  background-size: 72px 72px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.h1 { font-size: clamp(2.25rem, 5.2vw, 4rem); }
.h2 { font-size: clamp(1.75rem, 3.4vw, 2.75rem); }
.h3 { font-size: clamp(1.375rem, 2.2vw, 1.875rem); }
.h4 { font-size: clamp(1.125rem, 1.6vw, 1.375rem); }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.coord {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.link-cyan {
  color: var(--cyan);
  border-bottom: 1px solid rgba(53, 230, 216, 0.42);
  transition: border-color 0.18s ease, color 0.18s ease;
}
.link-cyan:hover { border-bottom-color: var(--cyan); color: var(--white); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: calc(var(--rail-w) + 14px);
  z-index: 600;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--cyan);
  color: #04181c;
  font-size: 14px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform 0.22s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 头部外壳 ---------- */
.site-header { position: relative; z-index: 300; }

/* 5.1 左侧品牌轨道 */
.brand-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 320;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 24px 0 26px;
  overflow: hidden;
  background: linear-gradient(180deg, #101C33 0%, #0B0E13 100%);
  border-right: 1px solid var(--steel);
}

.brand-rail__mark {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-rail__cn {
  writing-mode: vertical-rl;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--white);
}

.brand-rail__tag {
  writing-mode: vertical-rl;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--mist);
}

.brand-rail__coord {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.brand-rail__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), var(--cobalt));
  transform: scaleY(var(--progress, 0));
  transform-origin: bottom center;
  transition: transform 0.12s linear;
}

/* 5.2 移动导航按钮 */
.nav-toggle {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 420;
  display: none;
  align-items: center;
  gap: 10px;
  padding: 13px 20px;
  border-radius: 999px;
  background: var(--cobalt);
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.55);
  transition: background-color 0.2s ease, color 0.2s ease;
}
.nav-toggle[aria-expanded="true"] {
  background: var(--cyan);
  color: #04181c;
}

.nav-toggle__bars {
  position: relative;
  width: 18px;
  height: 2px;
  background: currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

/* 5.3 悬浮胶囊导航 */
.nav-pod {
  position: fixed;
  top: 18px;
  left: calc(var(--rail-w) + 22px);
  right: 22px;
  z-index: 400;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 8px 7px 10px;
  border: 1px solid var(--steel);
  border-radius: 999px;
  background: rgba(16, 28, 51, 0.86);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
}

.nav-pod__list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1 1 auto;
  min-width: 0;
}

.nav-pod__link {
  display: inline-block;
  padding: 9px 15px;
  border-radius: 999px;
  color: var(--mist);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.nav-pod__link:hover { color: var(--white); background: rgba(31, 91, 255, 0.22); }
.nav-pod__link[aria-current="page"] {
  background: var(--cobalt);
  color: var(--white);
}

.nav-pod__cta {
  display: inline-block;
  flex: 0 0 auto;
  padding: 11px 22px;
  border-radius: 999px;
  background: var(--orange);
  color: #180702;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}
.nav-pod__cta:hover {
  background: #ff7f47;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(255, 106, 43, 0.36);
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  border-top: 1px solid var(--steel);
  background: linear-gradient(180deg, #0B0E13 0%, #101C33 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--cobalt) 0 26%,
    var(--cyan) 26% 38%,
    var(--orange) 38% 44%,
    transparent 44% 100%
  );
}

.footer-inner {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--pad) clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: minmax(250px, 1fr) minmax(0, 2.1fr);
  gap: clamp(28px, 4vw, 64px);
}

.footer-brand {
  padding: 26px 24px 28px;
  border: 1px solid var(--steel);
  background: rgba(16, 28, 51, 0.55);
  clip-path: var(--cut);
}

.footer-brand__mark {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}
.footer-brand__mark::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 12px;
  background: var(--cyan);
}

.footer-brand__line {
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.footer-brand__note {
  margin-top: 18px;
  max-width: 34ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-col__title {
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

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

.footer-col__list a {
  display: inline-block;
  font-size: 14px;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.footer-col__list a:hover {
  color: var(--white);
  border-bottom-color: var(--cyan);
}

.footer-col__plain {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
  word-break: break-word;
}

.footer-legal {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding: 18px var(--pad) 26px;
  border-top: 1px solid var(--steel);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--mist);
}
.footer-legal a { color: var(--mist); transition: color 0.18s ease; }
.footer-legal a:hover { color: var(--cyan); }
.footer-legal__year { margin-left: auto; }

/* ---------- 7. 通用布局 ---------- */
.shell {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding-inline: var(--pad);
}

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--5-3-4 { grid-template-columns: 5fr 3fr 4fr; }

/* ---------- 8. 主题带 ---------- */
.band {
  position: relative;
  padding-block: clamp(28px, 4vw, 52px);
}
.band + .band { border-top: 1px solid rgba(36, 48, 64, 0.8); }

.band--slash::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: repeating-linear-gradient(115deg, var(--steel) 0 10px, transparent 10px 22px);
}

.band__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(18px, 2.4vw, 30px);
}

.band__title { font-size: clamp(1.5rem, 2.8vw, 2.25rem); }

.band__note {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.divider-slash {
  height: 1px;
  background: repeating-linear-gradient(115deg, var(--steel) 0 12px, transparent 12px 26px);
}

/* ---------- 9. 面板与按钮 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.2vw, 28px);
  border: 1px solid var(--steel);
  background: rgba(16, 28, 51, 0.5);
  clip-path: polygon(
    0 0,
    calc(100% - var(--chamfer)) 0,
    100% var(--chamfer),
    100% 100%,
    var(--chamfer) 100%,
    0 calc(100% - var(--chamfer))
  );
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.panel:hover { border-color: var(--cobalt); }
.panel--flat { background: var(--ink); }
.panel--hi { border-color: var(--cobalt); background: rgba(31, 91, 255, 0.12); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--steel);
  border-radius: 999px;
  background: rgba(16, 28, 51, 0.7);
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-1px);
}
.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #180702;
}
.btn--primary:hover {
  background: #ff7f47;
  border-color: #ff7f47;
  color: #180702;
}
.btn--ghost { background: transparent; }

.chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border: 1px solid var(--steel);
  border-radius: 999px;
  background: transparent;
  color: var(--mist);
  font-size: 13px;
  font-weight: 600;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}
.chip:hover { color: var(--white); border-color: var(--mist); }
.chip.is-on,
.chip[aria-pressed="true"] {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(53, 230, 216, 0.08);
}

/* ---------- 10. 面包屑与正文 ---------- */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mist);
}
.crumb a { transition: color 0.18s ease; }
.crumb a:hover { color: var(--cyan); }
.crumb__sep { color: var(--steel); }
.crumb [aria-current="page"] { color: var(--white); }

.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}
.prose h2 {
  margin: 2em 0 0.6em;
  font-size: clamp(1.5rem, 2.4vw, 1.875rem);
  color: var(--white);
}
.prose h3 {
  margin: 1.7em 0 0.5em;
  font-size: clamp(1.125rem, 1.7vw, 1.375rem);
  color: var(--white);
}
.prose p + p { margin-top: 1.05em; }
.prose ul {
  margin: 1.1em 0;
  padding-left: 1.15em;
  list-style: disc;
  display: flex;
  flex-direction: column;
  gap: 0.5em;
}
.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(53, 230, 216, 0.4);
}
.prose strong { color: var(--white); font-weight: 700; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

/* ---------- 11. 数据块与表格 ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}
.stat__value--accent { color: var(--orange); }
.stat__label {
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.table {
  width: 100%;
  font-size: 14px;
}
.table th {
  padding: 10px 12px;
  border-bottom: 1px solid var(--steel);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-align: left;
  white-space: nowrap;
}
.table td {
  padding: 12px;
  border-bottom: 1px solid rgba(36, 48, 64, 0.7);
  color: var(--white);
}
.table tbody tr { transition: background-color 0.16s ease; }
.table tbody tr:hover { background: rgba(31, 91, 255, 0.12); }
.table .num,
.table th.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* ---------- 12. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--steel);
  background:
    radial-gradient(circle at 30% 22%, rgba(53, 230, 216, 0.16), transparent 58%),
    linear-gradient(140deg, #101C33 0%, #0B0E13 100%);
  clip-path: polygon(
    0 0,
    calc(100% - 14px) 0,
    100% 14px,
    100% 100%,
    14px 100%,
    0 calc(100% - 14px)
  );
}
.media-frame img,
.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 16px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--white);
  background: linear-gradient(180deg, transparent, rgba(11, 14, 19, 0.9));
}

/* ---------- 13. 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateX(12px);
  transition: opacity 0.42s ease, transform 0.42s ease;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 响应式：平板 ---------- */
@media (max-width: 1180px) {
  .nav-pod__link { padding: 9px 11px; font-size: 13px; }
  .nav-pod__cta { padding: 10px 16px; font-size: 13px; }
  .footer-inner { grid-template-columns: minmax(220px, 1fr) minmax(0, 2fr); }
}

@media (max-width: 1024px) {
  .grid--7-5,
  .grid--8-4,
  .grid--5-3-4 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 15. 响应式：手机 ---------- */
@media (max-width: 900px) {
  :root {
    --rail-w: 0px;
    --top-gap: 74px;
    --chamfer: 10px;
  }

  body { background-size: 48px 48px; }

  .skip-link { left: 14px; right: 14px; text-align: center; }

  .brand-rail {
    inset: 0 0 auto 0;
    width: 100%;
    height: 56px;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 0 16px;
    border-right: 0;
    border-bottom: 1px solid var(--steel);
    background: rgba(11, 14, 19, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  .brand-rail__cn {
    writing-mode: horizontal-tb;
    font-size: 18px;
    letter-spacing: 0.02em;
  }

  .brand-rail__tag,
  .brand-rail__coord { display: none; }

  .brand-rail__progress {
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--cyan), var(--cobalt));
    transform: scaleX(var(--progress, 0));
    transform-origin: left center;
  }

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

  .nav-pod {
    top: auto;
    left: 12px;
    right: 12px;
    bottom: 76px;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 0 12px;
    border-radius: 20px;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(14px);
    transition: max-height 0.3s ease, opacity 0.2s ease, transform 0.3s ease, padding 0.3s ease;
  }

  .nav-pod[data-open] {
    max-height: 72vh;
    padding: 14px 12px;
    opacity: 1;
    transform: translateY(0);
  }

  .nav-pod__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    flex: 0 0 auto;
  }

  .nav-pod__link {
    padding: 13px 16px;
    border: 1px solid var(--steel);
    border-radius: 14px;
    font-size: 15px;
  }

  .nav-pod__cta {
    padding: 14px;
    text-align: center;
    font-size: 15px;
  }

  .footer-cols { grid-template-columns: 1fr; gap: 26px; }
  .footer-legal { flex-direction: column; align-items: flex-start; gap: 8px; }
  .footer-legal__year { margin-left: 0; }
}

@media (max-width: 480px) {
  .footer-cols { grid-template-columns: 1fr; }
  .btn { width: 100%; justify-content: center; }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .brand-rail__progress { transition: none; }
}