/* ==========================================================================
   一体育官网 · 共享样式 /assets/site.css
   夜间战术室 × 赛场灯光 | Bento 信息板 | 粗野主义边框与硬阴影
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, video { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }
input, textarea, select { font: inherit; color: inherit; }
[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink-900: #0D1F1A;
  --ink-800: #101312;
  --paper: #F2E8D5;
  --paper-dim: #CFC3AE;
  --cyan: #4DFFE0;
  --orange: #FF8A3D;
  --amber: #F6C453;
  --mist: #7FA89A;
  --edge: #1F3B33;
  --white: #FFFFFF;

  --bg: var(--ink-900);
  --fg: var(--paper-dim);
  --fg-strong: var(--white);
  --fg-muted: var(--mist);
  --line: var(--edge);
  --accent: var(--cyan);
  --action: var(--orange);

  --font-display: "Oswald", "Noto Sans SC", "Source Han Sans SC", Impact, sans-serif;
  --font-num: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-index: "JetBrains Mono", "Noto Sans SC", monospace;

  --maxw: 1280px;
  --gutter: clamp(16px, 4vw, 44px);
  --sp-1: 6px;
  --sp-2: 12px;
  --sp-3: 20px;
  --sp-4: 32px;
  --sp-5: 48px;
  --sp-6: 72px;

  --bd: 2px solid var(--edge);
  --bd-strong: 3px solid var(--edge);
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, .55);
  --shadow-soft: 0 18px 42px rgba(0, 0, 0, .45);
  --radius: 3px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 0px;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(31, 59, 51, .5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 59, 51, .5) 1px, transparent 1px),
    radial-gradient(circle at 80% -12%, rgba(77, 255, 224, .10), transparent 56%),
    radial-gradient(circle at 6% 108%, rgba(255, 138, 61, .08), transparent 52%);
  background-size: 48px 48px, 48px 48px, 100% 100%, 100% 100%;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: .01em;
  overflow-x: hidden;
}

::selection { background: var(--cyan); color: var(--ink-900); }

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

/* ---------- 4. Typography ---------- */
.yt-h1, .yt-h2, .yt-h3 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--fg-strong);
  text-wrap: balance;
}
.yt-h1 { font-size: clamp(30px, 5.6vw, 62px); }
.yt-h2 { font-size: clamp(24px, 3.6vw, 40px); }
.yt-h3 { font-size: clamp(19px, 2.2vw, 26px); }
.yt-h4 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.25;
  color: var(--fg-strong);
}
.yt-mono { font-family: var(--font-index); font-weight: 500; letter-spacing: .12em; }
.yt-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-index);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.yt-eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--cyan);
  display: inline-block;
}
.yt-lede {
  font-size: clamp(15px, 1.4vw, 17.5px);
  line-height: 1.78;
  color: var(--paper-dim);
}
.yt-note { font-size: 13.5px; color: var(--fg-muted); }
.yt-accent { color: var(--cyan); }
.yt-warm { color: var(--orange); }

/* ---------- 5. Layout ---------- */
.yt-container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.yt-section { padding: clamp(40px, 7vw, 88px) 0; }
.yt-section--tight { padding: clamp(26px, 4vw, 48px) 0; }
.yt-section--deep { background: var(--ink-800); border-top: var(--bd); border-bottom: var(--bd); }
.yt-section--paper { background: var(--paper); color: var(--ink-900); }
.yt-section--paper .yt-h1,
.yt-section--paper .yt-h2,
.yt-section--paper .yt-h3,
.yt-section--paper .yt-h4 { color: var(--ink-900); }
.yt-section--paper .yt-lede,
.yt-section--paper .yt-note { color: #2F3B35; }
.yt-section--paper .yt-eyebrow { color: #0B6B58; }
.yt-section--paper .yt-eyebrow::before { background: var(--orange); }

.yt-grid { display: grid; gap: clamp(12px, 1.6vw, 20px); }
.yt-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.yt-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.yt-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.yt-grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.yt-bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 20px);
  position: relative;
}
.yt-bento__cell { grid-column: span 12; min-width: 0; }
.yt-bento__cell--focus { grid-column: span 12; }

.yt-span-2 { grid-column: span 2; }
.yt-span-3 { grid-column: span 3; }
.yt-span-4 { grid-column: span 4; }
.yt-span-5 { grid-column: span 5; }
.yt-span-6 { grid-column: span 6; }
.yt-span-7 { grid-column: span 7; }
.yt-span-8 { grid-column: span 8; }
.yt-span-9 { grid-column: span 9; }
.yt-span-10 { grid-column: span 10; }
.yt-span-12 { grid-column: span 12; }

.yt-section-head {
  display: grid;
  gap: var(--sp-2);
  margin-bottom: clamp(20px, 3vw, 36px);
  border-left: 6px solid var(--edge);
  padding-left: var(--sp-3);
}
.yt-section-head__index {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--amber);
}
.yt-section-head__title { font-family: var(--font-display); font-weight: 900; font-size: clamp(22px, 3.2vw, 36px); line-height: 1.1; color: var(--fg-strong); }
.yt-section-head__title--ink { color: var(--ink-900); }

/* 框景外壳 */
.yt-frame {
  position: relative;
  border: var(--bd-strong);
  background: linear-gradient(180deg, rgba(16, 19, 18, .92), rgba(13, 31, 26, .96));
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 3vw, 40px);
}
.yt-frame__inner { position: relative; z-index: 1; }
.yt-frame__scale {
  display: flex;
  gap: 6px;
  align-items: flex-end;
  height: 14px;
  margin-bottom: 14px;
}
.yt-frame__scale span {
  flex: 1;
  height: 6px;
  background: var(--edge);
}
.yt-frame__scale span:nth-child(3n) { height: 12px; background: var(--cyan); opacity: .7; }
.yt-frame__scale--right { justify-content: flex-end; }
.yt-frame__corner {
  position: absolute;
  width: 16px;
  height: 16px;
  border: 3px solid var(--orange);
  pointer-events: none;
}
.yt-frame__corner--tl { top: -3px; left: -3px; border-right: 0; border-bottom: 0; }
.yt-frame__corner--br { bottom: -3px; right: -3px; border-left: 0; border-top: 0; }

/* ---------- 6. Buttons ---------- */
.yt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: var(--bd);
  border-color: #05100D;
  background: var(--paper);
  color: var(--ink-900);
  font-family: var(--font-index);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .12em;
  line-height: 1.2;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .55);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease);
}
.yt-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(0, 0, 0, .6);
}
.yt-btn:active { transform: translate(0, 0); box-shadow: 2px 2px 0 rgba(0, 0, 0, .6); }
.yt-btn--primary { background: var(--orange); color: #140C05; }
.yt-btn--primary:hover { background: #FFA164; }
.yt-btn--ghost { background: transparent; color: var(--paper); border-color: var(--edge); box-shadow: none; }
.yt-btn--ghost:hover { color: var(--cyan); border-color: var(--cyan); box-shadow: 4px 4px 0 rgba(0, 0, 0, .5); }
.yt-btn--sm { padding: 8px 13px; font-size: 11.5px; box-shadow: 3px 3px 0 rgba(0, 0, 0, .5); }
.yt-btn--block { width: 100%; }

.yt-link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-index);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cyan);
  border-bottom: 1px solid rgba(77, 255, 224, .4);
  padding-bottom: 2px;
}
.yt-link-more:hover { color: var(--white); border-bottom-color: var(--white); }

/* ---------- 7. Cards / Metrics / Tags / Tables ---------- */
.yt-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  padding: clamp(16px, 2vw, 24px);
  background: rgba(16, 19, 18, .78);
  border: var(--bd);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.yt-card:hover { border-color: var(--edge); box-shadow: 0 0 0 1px rgba(77, 255, 224, .35), var(--shadow-hard); transform: translate(-1px, -1px); }
.yt-card--paper { background: var(--paper); color: #1B2621; }
.yt-card--paper .yt-card__title, .yt-card--paper .yt-h4 { color: var(--ink-900); }
.yt-card--paper .yt-card__meta { color: #55635B; }
.yt-card--outline { background: transparent; box-shadow: none; border-style: dashed; }
.yt-card--flush { padding: 0; }
.yt-card__head { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-2); }
.yt-card__title { font-family: var(--font-display); font-weight: 900; font-size: clamp(17px, 1.7vw, 21px); line-height: 1.2; color: var(--fg-strong); }
.yt-card__meta { font-family: var(--font-index); font-size: 11.5px; letter-spacing: .14em; color: var(--fg-muted); }
.yt-card__body { font-size: 14.5px; line-height: 1.72; }
.yt-card__foot { margin-top: auto; padding-top: var(--sp-2); border-top: 1px dashed var(--edge); display: flex; align-items: center; justify-content: space-between; gap: var(--sp-2); }

.yt-metric { display: flex; flex-direction: column; gap: 4px; }
.yt-metric__value {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -.02em;
}
.yt-metric__value--warm { color: var(--orange); }
.yt-metric__label { font-family: var(--font-index); font-size: 11.5px; letter-spacing: .16em; color: var(--fg-muted); }
.yt-metric__delta { font-family: var(--font-index); font-size: 12px; color: var(--amber); }

.yt-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--edge);
  background: rgba(127, 168, 154, .12);
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--paper-dim);
  border-radius: 999px;
}
.yt-tag--cyan { color: var(--cyan); border-color: rgba(77, 255, 224, .5); background: rgba(77, 255, 224, .1); }
.yt-tag--orange { color: var(--orange); border-color: rgba(255, 138, 61, .5); background: rgba(255, 138, 61, .1); }
.yt-tag--amber { color: var(--amber); border-color: rgba(246, 196, 83, .5); background: rgba(246, 196, 83, .1); }

.yt-table { font-size: 14px; border: var(--bd); background: rgba(16, 19, 18, .7); }
.yt-table th, .yt-table td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--edge); }
.yt-table thead th {
  font-family: var(--font-index);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--amber);
  background: rgba(31, 59, 51, .5);
}
.yt-table tbody tr:nth-child(even) { background: rgba(31, 59, 51, .28); }
.yt-table tbody tr:hover { background: rgba(77, 255, 224, .07); }
.yt-table__num { font-family: var(--font-num); font-weight: 700; color: var(--cyan); }

.yt-timeline { display: flex; gap: 10px; overflow-x: auto; padding: 4px 0 12px; scroll-snap-type: x proximity; }
.yt-timeline__item {
  flex: 0 0 auto;
  scroll-snap-align: start;
  min-width: 108px;
  padding: 12px 14px;
  border: var(--bd);
  background: rgba(16, 19, 18, .8);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .45);
}
.yt-timeline__year { font-family: var(--font-num); font-weight: 700; font-size: 20px; color: var(--fg-strong); display: block; }
.yt-timeline__item[aria-current="true"] { border-color: var(--cyan); }
.yt-timeline__item[aria-current="true"] .yt-timeline__year { color: var(--cyan); }

.yt-divider { height: 1px; background: var(--edge); border: 0; margin: var(--sp-4) 0; }
.yt-rule { height: 8px; border-top: 2px solid var(--edge); border-bottom: 2px solid var(--edge); margin: var(--sp-4) 0; }

/* ---------- 8. Breadcrumb / Anchor nav / Prose / Accordion / Filter ---------- */
.yt-breadcrumb { padding: 16px 0 0; }
.yt-breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-family: var(--font-index); font-size: 11.5px; letter-spacing: .1em; color: var(--fg-muted); }
.yt-breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.yt-breadcrumb__item + .yt-breadcrumb__item::before { content: "/"; color: var(--edge); }
.yt-breadcrumb__link { color: var(--fg-muted); }
.yt-breadcrumb__link:hover { color: var(--cyan); }
.yt-breadcrumb__item[aria-current="page"] { color: var(--paper-dim); }

.yt-anchor-nav { border: var(--bd); background: rgba(16, 19, 18, .8); padding: var(--sp-3); }
.yt-anchor-nav__title { font-family: var(--font-index); font-size: 11.5px; letter-spacing: .18em; color: var(--amber); margin-bottom: 10px; }
.yt-anchor-nav__list { display: grid; gap: 6px; }
.yt-anchor-nav__link { display: block; font-size: 14px; color: var(--paper-dim); padding: 4px 0 4px 12px; border-left: 2px solid var(--edge); }
.yt-anchor-nav__link:hover, .yt-anchor-nav__link[aria-current="location"] { color: var(--cyan); border-left-color: var(--cyan); }

.yt-prose { max-width: 68ch; font-size: 16px; line-height: 1.78; }
.yt-prose > * + * { margin-top: var(--sp-3); }
.yt-prose h2 { font-family: var(--font-display); font-weight: 900; font-size: clamp(21px, 2.4vw, 28px); line-height: 1.2; color: var(--fg-strong); margin-top: var(--sp-5); }
.yt-prose h3 { font-family: var(--font-display); font-weight: 900; font-size: 18px; color: var(--fg-strong); margin-top: var(--sp-4); }
.yt-prose ul, .yt-prose ol { display: grid; gap: 8px; }
.yt-prose ul li { padding-left: 20px; position: relative; }
.yt-prose ul li::before { content: ""; position: absolute; left: 0; top: .72em; width: 10px; height: 2px; background: var(--cyan); }
.yt-prose ol { counter-reset: ytol; }
.yt-prose ol li { padding-left: 30px; position: relative; counter-increment: ytol; }
.yt-prose ol li::before {
  content: counter(ytol, decimal-leading-zero);
  position: absolute; left: 0; top: .1em;
  font-family: var(--font-index); font-size: 12px; color: var(--orange);
}
.yt-prose blockquote { border-left: 4px solid var(--edge); padding: 4px 0 4px 16px; color: var(--fg-muted); }
.yt-prose strong { color: var(--fg-strong); font-weight: 500; }
.yt-section--paper .yt-prose h2, .yt-section--paper .yt-prose h3, .yt-section--paper .yt-prose strong { color: var(--ink-900); }
.yt-section--paper .yt-prose ul li::before { background: var(--orange); }

.yt-accordion { display: grid; gap: 10px; }
.yt-accordion__item { border: var(--bd); background: rgba(16, 19, 18, .78); }
.yt-acc-trigger {
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-2);
  width: 100%; padding: 15px 18px; text-align: left;
  font-family: var(--font-display); font-weight: 900; font-size: 16px; color: var(--fg-strong);
}
.yt-acc-trigger:hover { color: var(--cyan); }
.yt-acc-trigger__icon { font-family: var(--font-num); color: var(--orange); font-size: 18px; line-height: 1; }
.yt-acc-trigger[aria-expanded="true"] .yt-acc-trigger__icon { color: var(--cyan); }
.yt-accordion__panel { padding: 0 18px 18px; border-top: 1px dashed var(--edge); margin-top: 0; font-size: 14.5px; line-height: 1.75; }

.yt-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--sp-4); }
.yt-filter__btn {
  padding: 7px 13px; border: 1px solid var(--edge); background: transparent;
  font-family: var(--font-index); font-size: 11.5px; letter-spacing: .1em; color: var(--fg-muted);
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}
.yt-filter__btn:hover { color: var(--cyan); border-color: var(--cyan); }
.yt-filter__btn.is-active { background: var(--cyan); border-color: var(--cyan); color: var(--ink-900); }
.is-filtered-out { display: none !important; }

/* ---------- 9. Media ---------- */
.yt-media {
  position: relative;
  border: var(--bd);
  background: var(--ink-800);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  box-shadow: var(--shadow-hard);
}
.yt-media img { width: 100%; height: 100%; object-fit: cover; }
.yt-media--tall { aspect-ratio: 3 / 4; }
.yt-media--square { aspect-ratio: 1 / 1; }
.yt-media--wide { aspect-ratio: 21 / 9; }
.yt-media--framed { border-width: 3px; }
.yt-media__ph {
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(31, 59, 51, .9) 0 12px, rgba(16, 19, 18, .9) 12px 24px);
}
.yt-media__cap {
  position: absolute; left: 0; bottom: 0; right: 0;
  padding: 7px 12px;
  background: rgba(13, 31, 26, .88);
  border-top: 1px solid var(--edge);
  font-family: var(--font-index); font-size: 11px; letter-spacing: .12em; color: var(--paper-dim);
}

/* ---------- 10. Header ---------- */
.yt-skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  padding: 12px 18px; background: var(--cyan); color: var(--ink-900);
  font-family: var(--font-index); font-size: 13px;
}
.yt-skip:focus { left: 12px; top: 12px; }

.yt-header {
  position: sticky; top: 0; z-index: 80;
  background: var(--ink-900);
  border-bottom: var(--bd-strong);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .5);
}
.yt-header__scan {
  display: block; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--orange), transparent);
  opacity: .45;
  background-size: 220% 100%;
  animation: yt-scan-x 6s linear infinite;
}
@keyframes yt-scan-x {
  0% { background-position: -120% 0; }
  100% { background-position: 220% 0; }
}

/* 工具条 */
.yt-utility { background: var(--ink-800); border-bottom: 1px solid var(--edge); }
.yt-utility__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); min-height: 44px; padding-top: 6px; padding-bottom: 6px; }
.yt-utility__note {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-index); font-size: 11.5px; letter-spacing: .1em; color: var(--fg-muted);
  min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.yt-utility__status { color: var(--fg-muted); }
.yt-dot {
  flex: 0 0 auto; width: 8px; height: 8px; background: var(--cyan); border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(77, 255, 224, .16);
  animation: yt-pulse 2.6s ease-in-out infinite;
}
@keyframes yt-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }
.yt-utility__actions { display: flex; align-items: center; gap: 6px; flex: 0 0 auto; }
.yt-utility__link {
  padding: 6px 11px;
  border: 1px solid transparent;
  font-family: var(--font-index); font-size: 12px; letter-spacing: .12em; color: var(--paper-dim);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.yt-utility__link:hover { color: var(--cyan); border-color: var(--edge); }

/* 刊头 */
.yt-masthead { background: var(--ink-900); }
.yt-masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--sp-3);
  padding: 14px 0 12px;
}
.yt-masthead__side { display: flex; align-items: center; gap: 12px; min-width: 0; }
.yt-masthead__side--left { display: none; }
.yt-masthead__side--right { justify-content: flex-end; }
.yt-masthead__rule { flex: 1 1 auto; height: 8px; border-top: 2px solid var(--edge); border-bottom: 2px solid var(--edge); min-width: 24px; }
.yt-masthead__side--right .yt-masthead__rule { display: none; }
.yt-masthead__issue {
  font-family: var(--font-index); font-size: 11px; letter-spacing: .16em; color: var(--fg-muted);
  white-space: nowrap;
}
.yt-masthead__issue .yt-mono { color: var(--amber); margin-right: 6px; }

.yt-brand__link { display: grid; justify-items: center; gap: 5px; text-align: center; }
.yt-brand__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.6vw, 46px);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--white);
  text-shadow: 3px 3px 0 rgba(31, 59, 51, .9);
}
.yt-brand__sub {
  font-family: var(--font-index);
  font-size: 10.5px;
  letter-spacing: .22em;
  color: var(--mist);
  text-transform: uppercase;
}
.yt-brand__link--footer { justify-items: start; text-align: left; }

/* 赛季切换 */
.yt-season {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 11px;
  border: var(--bd);
  background: rgba(16, 19, 18, .9);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, .5);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
}
.yt-season:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 rgba(0, 0, 0, .55); border-color: var(--cyan); }
.yt-season__label { font-size: 10.5px; color: var(--fg-muted); letter-spacing: .18em; }
.yt-season__value { font-family: var(--font-num); font-weight: 700; font-size: 15px; color: var(--cyan); letter-spacing: .02em; }
.yt-season__hint { font-size: 10px; color: var(--orange); letter-spacing: .16em; }

/* 导航 */
.yt-nav { display: block; background: var(--ink-800); border-top: var(--bd); }
.yt-nav__list { display: flex; flex-wrap: wrap; justify-content: center; align-items: stretch; gap: 0; }
.yt-nav__item { display: flex; }
.yt-nav__link {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 20px;
  border-right: 1px solid var(--edge);
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--paper-dim);
  transition: background-color .16s var(--ease), color .16s var(--ease);
}
.yt-nav__item:first-child .yt-nav__link { border-left: 1px solid var(--edge); }
.yt-nav__link:hover { background: rgba(77, 255, 224, .08); color: var(--cyan); }
.yt-nav__num { font-size: 10.5px; color: var(--edge); transition: color .16s var(--ease); }
.yt-nav__link:hover .yt-nav__num { color: var(--amber); }
.yt-nav__link[aria-current="page"] { background: var(--cyan); color: var(--ink-900); }
.yt-nav__link[aria-current="page"] .yt-nav__num { color: rgba(13, 31, 26, .55); }

/* 移动端导航按钮 */
.yt-nav-toggle {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 9px 13px;
  border: var(--bd);
  background: var(--ink-800);
  color: var(--paper-dim);
  font-family: var(--font-index); font-size: 12px; letter-spacing: .12em;
  box-shadow: 3px 3px 0 rgba(0, 0, 0, .5);
}
.yt-nav-toggle__bars { position: relative; display: block; width: 20px; height: 2px; background: var(--cyan); }
.yt-nav-toggle__bars::before,
.yt-nav-toggle__bars::after { content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: var(--cyan); }
.yt-nav-toggle__bars::before { top: -6px; }
.yt-nav-toggle__bars::after { top: 6px; }
.yt-header[data-open] .yt-nav-toggle { border-color: var(--orange); color: var(--orange); }
.yt-header[data-open] .yt-nav-toggle__bars,
.yt-header[data-open] .yt-nav-toggle__bars::before,
.yt-header[data-open] .yt-nav-toggle__bars::after { background: var(--orange); }

/* 收缩态 */
.yt-header.is-condensed .yt-utility { display: none; }
.yt-header.is-condensed .yt-masthead__inner { padding: 8px 0; }
.yt-header.is-condensed .yt-brand__sub { display: none; }
.yt-header.is-condensed .yt-brand__mark { font-size: clamp(20px, 3vw, 28px); }

/* ---------- 11. Footer ---------- */
.yt-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink-800);
  border-top: var(--bd-strong);
  color: var(--fg);
}
.yt-footer__scanline {
  display: block; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--orange), transparent);
  opacity: .5;
}
.yt-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(32px, 5vw, 64px) 0 clamp(24px, 3vw, 40px);
}
.yt-footer__brand { display: grid; gap: var(--sp-3); align-content: start; }
.yt-footer__brand .yt-brand__mark { font-size: clamp(22px, 3vw, 32px); }
.yt-footer__stats { display: flex; flex-wrap: wrap; gap: 0; border-top: 2px solid var(--edge); padding-top: var(--sp-3); }
.yt-stat { display: flex; flex-direction: column; gap: 2px; padding: 0 18px 0 0; margin-right: 18px; border-right: 1px dashed var(--edge); }
.yt-stat:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.yt-stat__num { font-family: var(--font-num); font-weight: 700; font-size: 24px; line-height: 1.1; color: var(--cyan); }
.yt-stat__label { font-family: var(--font-index); font-size: 11px; letter-spacing: .12em; color: var(--fg-muted); }

.yt-footer__nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-4); }
.yt-footer__col { min-width: 0; }
.yt-footer__title {
  font-family: var(--font-index); font-size: 11.5px; font-weight: 500; letter-spacing: .2em;
  text-transform: uppercase; color: var(--amber); margin-bottom: 12px;
}
.yt-footer__list { display: grid; gap: 2px; }
.yt-footer__link { display: inline-block; padding: 5px 0; font-size: 14.5px; color: var(--paper-dim); transition: color .16s var(--ease), transform .16s var(--ease); }
.yt-footer__link::before { content: "▸ "; color: var(--edge); transition: color .16s var(--ease); }
.yt-footer__link:hover { color: var(--cyan); transform: translateX(3px); }
.yt-footer__link:hover::before { color: var(--cyan); }

.yt-footer__contact {
  border: var(--bd);
  border-left: 6px solid var(--cyan);
  background: rgba(13, 31, 26, .8);
  padding: var(--sp-3) clamp(16px, 2vw, 24px);
}
.yt-contact-list { display: grid; gap: 10px; }
.yt-contact-item { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding-bottom: 10px; border-bottom: 1px dashed var(--edge); }
.yt-contact-item:last-child { border-bottom: 0; padding-bottom: 0; }
.yt-contact-item__key { font-size: 11px; letter-spacing: .16em; color: var(--fg-muted); min-width: 46px; }
.yt-contact-item__val { font-family: var(--font-num); font-size: 14px; color: var(--paper); word-break: break-word; }
.yt-copy {
  padding: 5px 10px; border: 1px solid var(--edge);
  font-family: var(--font-index); font-size: 11px; letter-spacing: .1em; color: var(--cyan);
  transition: background-color .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease);
}
.yt-copy:hover { background: var(--cyan); color: var(--ink-900); border-color: var(--cyan); }
.yt-copy[data-copied="true"] { background: var(--amber); border-color: var(--amber); color: var(--ink-900); }
.yt-footer__note { margin-top: var(--sp-3); font-size: 13px; line-height: 1.7; color: var(--fg-muted); }

.yt-footer__meta {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px;
  margin-top: clamp(20px, 3vw, 32px);
  padding: 16px 0 28px;
  border-top: var(--bd);
  font-family: var(--font-index); font-size: 11.5px; letter-spacing: .1em; color: var(--fg-muted);
}
.yt-footer__meta-item { margin: 0; }

/* ---------- 12. JS 注入组件 ---------- */
.yt-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 120;
  background: rgba(31, 59, 51, .5); pointer-events: none;
}
.yt-progress__bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--cyan), var(--orange)); }
.yt-top-btn {
  position: fixed; right: clamp(14px, 3vw, 28px); bottom: clamp(14px, 3vw, 28px); z-index: 110;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 14px; border: var(--bd);
  background: var(--paper); color: var(--ink-900);
  font-family: var(--font-index); font-size: 11.5px; letter-spacing: .12em;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .6);
  opacity: 0; visibility: hidden;
  transition: opacity .22s var(--ease), visibility .22s var(--ease), transform .18s var(--ease);
}
.yt-top-btn.is-visible { opacity: 1; visibility: visible; }
.yt-top-btn:hover { transform: translate(-2px, -2px); }

/* ---------- 13. Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity .5s var(--ease) var(--reveal-delay, 0ms),
    transform .55s var(--ease) var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 14. 焦点与动效降级 ---------- */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}
.yt-nav__link:focus-visible { outline-offset: -4px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .yt-dot { animation: none; }
  .yt-header__scan { animation: none; }
  .yt-btn:hover, .yt-card:hover, .yt-season:hover, .yt-top-btn:hover { transform: none; }
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 899px) {
  .yt-utility__note { display: none; }
  .yt-utility__inner { justify-content: flex-end; }

  .yt-masthead__inner { grid-template-columns: 1fr auto; padding: 12px 0 10px; }
  .yt-masthead__side--left { display: none; }
  .yt-masthead__side--right { gap: 8px; }
  .yt-brand__link { justify-items: start; text-align: left; }

  .yt-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    display: none;
    background: var(--ink-800);
    border-top: var(--bd);
    border-bottom: var(--bd-strong);
    box-shadow: 0 24px 44px rgba(0, 0, 0, .6);
    max-height: 72vh; overflow-y: auto;
  }
  .yt-header[data-open] .yt-nav { display: block; }
  .yt-nav .yt-container { padding: 0; }
  .yt-nav__list { flex-direction: column; flex-wrap: nowrap; align-items: stretch; }
  .yt-nav__item { display: block; }
  .yt-nav__link {
    display: flex; justify-content: flex-start; gap: 14px;
    padding: 16px var(--gutter);
    border-right: 0; border-bottom: 1px solid var(--edge);
    font-size: 14px;
  }
  .yt-nav__item:first-child .yt-nav__link { border-left: 0; }
  .yt-nav__link[aria-current="page"] { box-shadow: inset 6px 0 0 var(--orange); }

  .yt-grid--2, .yt-grid--3, .yt-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yt-span-2, .yt-span-3, .yt-span-4, .yt-span-5, .yt-span-6, .yt-span-7, .yt-span-8, .yt-span-9, .yt-span-10 { grid-column: span 12; }
  .yt-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .yt-nav-toggle { display: none; }
  .yt-masthead__inner { grid-template-columns: 1fr auto 1fr; padding: 18px 0 14px; }
  .yt-masthead__side--left { display: flex; }
  .yt-masthead__side--right { justify-content: flex-end; }
  .yt-masthead__side--right .yt-masthead__rule { display: block; }
  .yt-bento__cell--focus { grid-column: span 7; }
  .yt-footer__top { grid-template-columns: 1.05fr 1.6fr; }
  .yt-footer__nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 599px) {
  .yt-grid--2, .yt-grid--3, .yt-grid--4 { grid-template-columns: minmax(0, 1fr); }
  .yt-masthead__issue { display: none; }
  .yt-season__hint { display: none; }
  .yt-stat { border-right: 0; margin-right: 0; padding-right: 0; }
  .yt-footer__stats { gap: var(--sp-3); }
  .yt-contact-item__val { font-size: 13px; }
  .yt-footer__meta { justify-content: flex-start; }
  .yt-frame { padding: 16px; }
}

/* ---------- 16. 打印 ---------- */
@media print {
  .yt-header, .yt-footer, .yt-progress, .yt-top-btn, .yt-skip, .yt-nav-toggle { display: none !important; }
  body { background: #FFFFFF; color: #101312; background-image: none; }
  .yt-card, .yt-frame, .yt-table { box-shadow: none; border-color: #999; }
  .yt-prose { max-width: none; }
}