/* =========================================================
   三亿体育赛场 · 共享外壳样式 /assets/site.css
   1 reset  2 变量  3 基础排版  4 头部  5 页脚  6 通用组件
   7 显现与动效  8 无障碍
   ========================================================= */

/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; }
:focus-visible { outline: 2px solid #35F0C8; outline-offset: 3px; border-radius: 4px; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #0A1F1B;
  --ink-800: #0F2A26;
  --block-950: #14161C;
  --line-700: #1E2129;
  --signal-cyan: #35F0C8;
  --cyan-100: #9FFCE6;
  --alert-orange: #FF7A2F;
  --sand-50: #F2F5F1;
  --slate-400: #8A93A6;
  --amber-400: #FFC44D;
  --teal-600: #0C6B5A;

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

  --rail-w: 0px;
  --pad-x: 20px;
  --shell: 1440px;
  --gap: 24px;
  --r-card: 24px;
  --r-sub: 20px;
  --r-media: 28px;
  --r-pill: 999px;
  --grid-line: rgba(159, 252, 230, .055);
  --t-fast: 180ms;
  --t-slow: 420ms;
  --ease: cubic-bezier(.22, .61, .36, 1);
}
@media (min-width: 1024px) {
  :root { --rail-w: 96px; --pad-x: 48px; }
}
@media (min-width: 768px) {
  :root { --pad-x: 32px; }
}
@media (min-width: 1024px) {
  :root { --pad-x: 48px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  padding-top: 104px;
  background-color: var(--ink-900);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--sand-50);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}
@media (min-width: 900px) { body { padding-top: 116px; } }
@media (min-width: 1024px) { body { padding-left: var(--rail-w); padding-top: 124px; } }

h1 { font-family: var(--font-display); font-weight: 700; font-size: clamp(30px, 5vw, 52px); line-height: 1.14; letter-spacing: -.01em; }
h2 { font-family: var(--font-display); font-weight: 700; font-size: clamp(24px, 3.4vw, 32px); line-height: 1.25; letter-spacing: -.01em; }
h3 { font-family: var(--font-display); font-weight: 700; font-size: clamp(19px, 2.4vw, 22px); line-height: 1.35; letter-spacing: -.01em; }
h4 { font-family: var(--font-display); font-weight: 700; font-size: 18px; line-height: 1.4; }
p { max-width: 68ch; }
strong { color: var(--cyan-100); }

#main-content { display: block; min-height: 50vh; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; top: -120px; left: 16px; z-index: 200;
  padding: 10px 18px; border-radius: var(--r-pill);
  background: var(--signal-cyan); color: #06231D;
  font-size: 14px; font-weight: 700; text-decoration: none;
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: 16px; }

/* ---------- 4. 头部 ---------- */
.site-header { position: fixed; inset: 0; z-index: 120; pointer-events: none; }
.site-header a, .site-header button, .nav-island, .brand-rail { pointer-events: auto; }

.nav-island {
  position: absolute; top: 12px; left: 12px; right: 12px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas: "lead toggle" "tools tools";
  align-items: center;
  gap: 10px 12px;
  padding: 10px 14px;
  border: 1px solid var(--line-700);
  border-radius: 26px;
  background: rgba(15, 42, 38, .9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), border-radius var(--t-fast) var(--ease), padding var(--t-fast) var(--ease);
}
.nav-island[data-open] { grid-template-areas: "lead toggle" "nav nav" "tools tools"; }
.site-header.is-scrolled .nav-island {
  background: rgba(10, 31, 27, .96);
  border-color: rgba(53, 240, 200, .28);
}

.nav-island__lead { grid-area: lead; display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; flex: 0 0 auto; }
.brand-mark__dot { width: 10px; height: 10px; border-radius: 50%; background: var(--signal-cyan); box-shadow: 0 0 0 4px rgba(53, 240, 200, .16); }
.brand-mark__name { font-family: var(--font-display); font-weight: 700; font-size: 17px; letter-spacing: -.01em; color: var(--sand-50); white-space: nowrap; transition: color var(--t-fast) var(--ease); }
.brand-mark:hover .brand-mark__name { color: var(--signal-cyan); }
.brand-line {
  display: none; max-width: none; white-space: nowrap;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .12em; color: var(--slate-400);
}
@media (min-width: 1180px) { .brand-line { display: block; } }

.nav-toggle {
  grid-area: toggle;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: var(--r-pill);
  border: 1px solid var(--line-700); color: var(--sand-50);
  font-size: 14px; font-weight: 700;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.nav-toggle:hover { border-color: var(--signal-cyan); color: var(--signal-cyan); }
.nav-toggle__bars { position: relative; display: block; width: 16px; height: 2px; background: currentColor; transition: background var(--t-fast) var(--ease); }
.nav-toggle__bars::before,
.nav-toggle__bars::after { content: ""; position: absolute; left: 0; width: 16px; height: 2px; background: currentColor; transition: transform var(--t-fast) var(--ease); }
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__txt { font-size: 14px; }

.nav { grid-area: nav; display: none; }
.nav[data-open] { display: block; margin-top: 2px; padding-top: 8px; border-top: 1px solid var(--line-700); }
.nav__list { display: flex; flex-direction: column; gap: 2px; }
.nav__item { display: block; }
.nav__link {
  display: block; padding: 10px 14px; border-radius: 16px;
  font-size: 16px; text-decoration: none; color: var(--sand-50); opacity: .78;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.nav__link:hover { background: var(--teal-600); color: var(--cyan-100); opacity: 1; }
.nav__link[aria-current="page"] {
  background: var(--teal-600); color: var(--cyan-100); opacity: 1;
  box-shadow: inset 0 0 0 1px rgba(53, 240, 200, .32);
}

.nav-island__tools { grid-area: tools; display: flex; align-items: center; gap: 10px; }
.fav { position: relative; }
.fav__toggle {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: var(--r-pill);
  border: 1px solid var(--line-700); color: var(--sand-50); font-size: 14px;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.fav__toggle:hover { border-color: var(--alert-orange); color: var(--alert-orange); }
.fav__toggle[aria-expanded="true"] { border-color: var(--alert-orange); color: var(--alert-orange); background: rgba(255, 122, 47, .12); }
.fav__count {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 22px; height: 22px; padding: 0 6px; border-radius: var(--r-pill);
  background: var(--alert-orange); color: #2A1004;
  font-family: var(--font-mono); font-weight: 700; font-size: 12px;
}
.fav__panel {
  position: absolute; top: calc(100% + 10px); right: 0; z-index: 12;
  width: min(320px, 86vw); padding: 16px;
  border: 1px solid var(--line-700); border-radius: var(--r-sub);
  background: var(--ink-800);
  box-shadow: 0 24px 48px rgba(0, 0, 0, .45);
}
.fav__panel[hidden] { display: none; }
.fav__hint { margin-bottom: 12px; font-size: 13px; line-height: 1.6; color: var(--slate-400); }
.fav__list { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 6px 12px; border-radius: var(--r-pill);
  border: 1px solid var(--line-700); font-size: 13px; color: var(--sand-50);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.chip:hover { border-color: var(--signal-cyan); color: var(--signal-cyan); }
.chip[aria-pressed="true"] { background: var(--signal-cyan); border-color: var(--signal-cyan); color: #06231D; font-weight: 700; }
.nav-search {
  display: inline-flex; align-items: center;
  padding: 8px 14px; border-radius: var(--r-pill);
  background: var(--teal-600); color: var(--cyan-100);
  font-size: 14px; text-decoration: none;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.nav-search:hover { background: var(--signal-cyan); color: #06231D; }

.brand-rail { display: none; }
.brand-rail__mark { text-decoration: none; color: var(--sand-50); }
.brand-rail__accent { color: var(--signal-cyan); }
.brand-rail__mark:hover { color: var(--signal-cyan); }
.rail-ticks__list { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.rail-ticks__link {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 8px 4px; border-radius: 14px; text-decoration: none;
  color: var(--slate-400);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.rail-ticks__link:hover { color: var(--signal-cyan); }
.rail-ticks__link[aria-current="page"] { color: var(--cyan-100); background: rgba(12, 107, 90, .38); }
.rail-ticks__no { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; }
.rail-ticks__txt { font-size: 13px; letter-spacing: .18em; }
.rail-foot { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.rail-foot__line { width: 1px; height: 44px; background: linear-gradient(to bottom, var(--line-700), transparent); }
.rail-foot__link { writing-mode: vertical-rl; font-family: var(--font-mono); font-size: 12px; letter-spacing: .2em; color: var(--slate-400); text-decoration: none; transition: color var(--t-fast) var(--ease); }
.rail-foot__link:hover { color: var(--alert-orange); }

.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 140;
  background: linear-gradient(90deg, var(--signal-cyan), var(--alert-orange));
  transform: scaleX(var(--progress, 0));
  transform-origin: 0 50%;
  pointer-events: none;
  transition: transform 120ms linear;
}

@media (min-width: 900px) {
  .nav-island {
    top: 16px; left: calc(var(--rail-w) + 32px); right: 32px;
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "lead nav tools";
    gap: 18px;
    padding: 10px 14px 10px 20px;
    border-radius: var(--r-pill);
  }
  .nav-island[data-open] { grid-template-areas: "lead nav tools"; }
  .nav-toggle { display: none; }
  .nav { display: block; grid-area: nav; min-width: 0; }
  .nav[data-open] { margin-top: 0; padding-top: 0; border-top: 0; }
  .nav__list { flex-direction: row; flex-wrap: nowrap; justify-content: center; gap: 4px; overflow-x: auto; scrollbar-width: none; }
  .nav__list::-webkit-scrollbar { display: none; }
  .nav__link { padding: 8px 13px; border-radius: var(--r-pill); font-size: 15px; white-space: nowrap; }
}

@media (min-width: 1024px) {
  .brand-rail {
    position: absolute; top: 0; left: 0; bottom: 0; width: var(--rail-w);
    display: flex; flex-direction: column; align-items: center; justify-content: space-between;
    padding: 22px 0;
    background: var(--block-950);
    border-right: 1px solid var(--line-700);
  }
  .brand-rail__mark { writing-mode: vertical-rl; font-family: var(--font-display); font-weight: 700; font-size: 17px; letter-spacing: .22em; transition: color var(--t-fast) var(--ease); }
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 80px;
  padding: 64px 20px 0;
  background: var(--block-950);
  border-top: 1px solid var(--line-700);
}
@media (min-width: 768px) { .site-footer { padding: 72px 32px 0; } }
@media (min-width: 1024px) { .site-footer { margin-top: 120px; padding: 88px 48px 0; } }
.site-footer::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(159, 252, 230, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(159, 252, 230, .07) 1px, transparent 1px);
  background-size: 32px 32px;
}
.site-footer > * { position: relative; }

.footer-grid { max-width: var(--shell); margin: 0 auto; display: grid; gap: 40px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .footer-grid { grid-template-columns: 1.5fr repeat(3, minmax(0, 1fr)); gap: 56px 40px; } }

.footer-brand__mark { display: inline-block; font-family: var(--font-display); font-weight: 700; font-size: 24px; letter-spacing: -.01em; text-decoration: none; color: var(--sand-50); transition: color var(--t-fast) var(--ease); }
.footer-brand__mark:hover { color: var(--signal-cyan); }
.footer-brand__line { margin-top: 10px; max-width: none; font-family: var(--font-mono); font-size: 13px; letter-spacing: .12em; color: var(--signal-cyan); }
.footer-brand__note { margin-top: 14px; max-width: 34ch; font-size: 15px; line-height: 1.75; color: var(--slate-400); }

.footer-col__title { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; font-family: var(--font-display); font-size: 16px; font-weight: 700; letter-spacing: .02em; color: var(--sand-50); }
.footer-col__no { font-family: var(--font-mono); font-size: 12px; font-weight: 700; letter-spacing: .12em; color: var(--signal-cyan); }
.footer-col__list { display: grid; gap: 10px; }
.footer-col__link {
  position: relative; display: inline-block;
  font-size: 15px; color: var(--slate-400); text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}
.footer-col__link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px;
  background: var(--signal-cyan);
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform var(--t-fast) var(--ease);
}
.footer-col__link:hover { color: var(--sand-50); }
.footer-col__link:hover::after { transform: scaleX(1); }

.footer-contact { max-width: var(--shell); margin: 48px auto 0; padding-top: 36px; border-top: 1px solid var(--line-700); }
.footer-contact__title { margin-bottom: 20px; font-family: var(--font-mono); font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--slate-400); }
.footer-contact__list { display: grid; gap: 12px; }
.footer-contact__row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; }
.footer-contact__key { flex: 0 0 auto; min-width: 76px; font-family: var(--font-mono); font-size: 13px; letter-spacing: .08em; color: var(--cyan-100); }
.footer-contact__val { font-family: var(--font-mono); font-size: 15px; color: var(--sand-50); word-break: break-all; user-select: all; }
.copy-btn {
  flex: 0 0 auto; padding: 4px 12px; border-radius: var(--r-pill);
  border: 1px solid var(--line-700);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; color: var(--slate-400);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.copy-btn:hover { border-color: var(--signal-cyan); color: var(--signal-cyan); }
.copy-btn.is-done { border-color: var(--alert-orange); color: var(--alert-orange); background: rgba(255, 122, 47, .12); }
.footer-contact__note { margin-top: 18px; max-width: 70ch; font-size: 14px; line-height: 1.75; color: var(--slate-400); }

.legal-bar {
  max-width: var(--shell); margin: 40px auto 0; padding: 20px 0 28px;
  border-top: 1px solid var(--line-700);
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
}
.legal-bar__text { max-width: none; font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; color: var(--slate-400); }

/* ---------- 6. 通用组件 ---------- */
.wrap { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: var(--pad-x); }

.section { padding-block: 56px; }
@media (min-width: 1024px) { .section { padding-block: 88px; } }
.section--tight { padding-block: 36px; }
.section__head {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px 20px;
  margin-bottom: 28px; padding-bottom: 14px;
  border-bottom: 1px solid var(--line-700);
}
.section__title { font-family: var(--font-display); font-size: clamp(24px, 3.4vw, 32px); letter-spacing: -.01em; }
.lead { max-width: 60ch; font-size: 19px; line-height: 1.75; color: var(--sand-50); }
.note { max-width: 68ch; font-size: 14px; line-height: 1.75; color: var(--slate-400); }
.mono { font-family: var(--font-mono); font-size: 13px; letter-spacing: .12em; color: var(--slate-400); }

.label {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 4px 12px; border-radius: var(--r-pill);
  background: var(--teal-600); color: var(--cyan-100);
  font-family: var(--font-mono); font-size: 13px; line-height: 1.7; letter-spacing: .12em;
}
.label__no { opacity: .72; }
.label--orange { background: rgba(255, 122, 47, .16); color: var(--alert-orange); box-shadow: inset 0 0 0 1px rgba(255, 122, 47, .42); }
.label--ghost { background: transparent; color: var(--slate-400); box-shadow: inset 0 0 0 1px var(--line-700); }

.tag {
  display: inline-flex; align-items: center;
  padding: 3px 10px; border-radius: var(--r-pill);
  border: 1px solid var(--line-700);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--slate-400);
}
.tag--cyan { border-color: rgba(53, 240, 200, .42); color: var(--signal-cyan); }
.tag--orange { border-color: rgba(255, 122, 47, .45); color: var(--alert-orange); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 15px; font-weight: 700; line-height: 1.4; text-decoration: none;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.btn--cyan { background: var(--signal-cyan); color: #06231D; }
.btn--cyan:hover { background: var(--cyan-100); }
.btn--orange { background: var(--alert-orange); color: #2A1004; }
.btn--orange:hover { background: var(--amber-400); }
.btn--ghost { background: transparent; border-color: var(--line-700); color: var(--sand-50); }
.btn--ghost:hover { border-color: var(--signal-cyan); color: var(--signal-cyan); }

.link {
  position: relative; color: var(--signal-cyan); text-decoration: none;
}
.link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px;
  background: var(--signal-cyan);
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform var(--t-fast) var(--ease);
}
.link:hover::after { transform: scaleX(1); }

.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 13px; letter-spacing: .12em; }
.crumbs__item { color: var(--slate-400); }
.crumbs__item[aria-current="page"] { color: var(--sand-50); }
.crumbs__link { color: var(--slate-400); text-decoration: none; transition: color var(--t-fast) var(--ease); }
.crumbs__link:hover { color: var(--signal-cyan); }
.crumbs__sep { color: var(--slate-400); opacity: .5; }

.card {
  position: relative; display: block;
  padding: 24px; border-radius: var(--r-card);
  border: 1px solid var(--line-700); background: var(--ink-800);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
a.card:hover, .card:hover { border-color: var(--signal-cyan); transform: translateY(-4px); }
.card--sub { border-radius: var(--r-sub); background: var(--ink-900); padding: 20px; }
.card--accent { border-color: rgba(53, 240, 200, .35); }
.card__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.card__title { margin-bottom: 8px; font-family: var(--font-display); font-size: 21px; line-height: 1.35; letter-spacing: -.01em; }
.card__meta { font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; color: var(--slate-400); }
.card__text { max-width: 60ch; font-size: 16px; line-height: 1.75; color: var(--slate-400); }
.card__foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line-700); }

.grid { display: grid; gap: var(--gap); }
.grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 768px) {
  .grid--2, .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1100px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.media {
  position: relative; overflow: hidden; aspect-ratio: 16 / 9;
  border: 1px solid var(--line-700); border-radius: var(--r-media);
  background: linear-gradient(150deg, var(--ink-800), var(--block-950));
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.media__grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(159, 252, 230, .14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(159, 252, 230, .14) 1px, transparent 1px);
  background-size: 40px 40px;
}
.media__cap {
  position: absolute; left: 16px; bottom: 14px; right: 16px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; color: var(--cyan-100);
}

.matrix-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--line-700); border-radius: var(--r-card); }
.matrix { width: 100%; min-width: 560px; font-size: 15px; }
.matrix th, .matrix td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--line-700); white-space: nowrap; }
.matrix thead th {
  background: var(--teal-600); color: var(--cyan-100);
  font-family: var(--font-mono); font-size: 12px; font-weight: 700; letter-spacing: .12em;
}
.matrix tbody tr { transition: background var(--t-fast) var(--ease); }
.matrix tbody tr:hover { background: rgba(53, 240, 200, .07); }
.matrix__num { font-family: var(--font-mono); font-weight: 700; color: var(--sand-50); }

.timeline { display: grid; gap: 30px; padding-left: 24px; border-left: 1px solid var(--line-700); }
.timeline__item { position: relative; }
.timeline__item::before {
  content: ""; position: absolute; left: -30px; top: 9px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--block-950); border: 2px solid var(--signal-cyan);
}
.timeline__item--orange::before { border-color: var(--alert-orange); }

.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__num { font-family: var(--font-mono); font-weight: 700; font-size: clamp(48px, 12vw, 120px); line-height: .92; letter-spacing: -.02em; color: var(--sand-50); }
.stat__num--cyan { color: var(--signal-cyan); }
.stat__num--orange { color: var(--alert-orange); }
.stat__cap { font-family: var(--font-mono); font-size: 13px; letter-spacing: .12em; color: var(--slate-400); }

/* ---------- 7. 显现与动效 ---------- */
@media (prefers-reduced-motion: no-preference) {
  html.reveal [data-reveal] {
    opacity: 0;
    transform: translateY(6px);
    transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
  }
  html.reveal [data-reveal].is-in { opacity: 1; transform: none; }
}

/* ---------- 8. 无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.reveal [data-reveal] { opacity: 1 !important; transform: none !important; }
}