/* ============================================================
   金年会体育 · 共享样式 /assets/site.css
   赛事指挥中心：深墨绿底 + 玻璃状态层 + 荧光青数据高亮
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}
body, h1, h2, h3, h4, h5, p, figure, blockquote, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, canvas { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink-0: #041B18;
  --ink-1: #0A2E28;
  --ink-2: #02100E;
  --glass: rgba(214, 255, 246, 0.07);
  --glass-strong: rgba(214, 255, 246, 0.12);
  --line: rgba(214, 255, 246, 0.14);
  --line-soft: rgba(214, 255, 246, 0.08);
  --cyan: #3BF5D4;
  --teal: #1FAF9A;
  --red: #FF4F5E;
  --gold: #F3B84B;
  --white: #E9F7F2;
  --mist: #9DBDB4;
  --rail-w: 232px;
  --shell-w: 1180px;
  --gap: 20px;
  --radius: 8px;
  --dur: 180ms;
  --font-display: "Barlow Condensed", "Oswald", "Arial Narrow", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(1100px 620px at 88% -12%, rgba(59, 245, 212, 0.12), transparent 62%),
    radial-gradient(880px 520px at -8% 108%, rgba(31, 175, 154, 0.14), transparent 66%),
    var(--ink-0);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    linear-gradient(rgba(214, 255, 246, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(214, 255, 246, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 0%, transparent 78%);
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 0%, transparent 78%);
}
#main-content { position: relative; z-index: 1; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}
h1 { font-size: clamp(2.5rem, 5.2vw, 4rem); }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); line-height: 1.25; }
h4 { font-size: 1.05rem; line-height: 1.4; letter-spacing: 0; }
p { color: var(--white); }
strong { font-weight: 600; color: var(--white); }
::selection { background: var(--cyan); color: var(--ink-2); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }

/* ---------- 4. 布局工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}
.section { position: relative; padding-block: clamp(48px, 7vw, 96px); }
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(24px, 3vw, 40px);
}
.section-head p { max-width: 62ch; color: var(--mist); }
.divider {
  height: 1px;
  border: 0;
  margin-block: clamp(28px, 4vw, 48px);
  background: linear-gradient(90deg, var(--line), transparent);
}
.stack { display: flex; flex-direction: column; gap: var(--gap); }
.stack--tight { gap: 10px; }
.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* ---------- 5. 索引元素 ---------- */
.label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before { content: ""; display: block; width: 26px; height: 1px; background: var(--cyan); }
.kbd {
  display: inline-block;
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: rgba(2, 16, 14, 0.6);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}
.chip--live { color: var(--red); border-color: rgba(255, 79, 94, 0.42); background: rgba(255, 79, 94, 0.1); }
.chip--live::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--red); }
.chip--gold { color: var(--gold); border-color: rgba(243, 184, 75, 0.42); background: rgba(243, 184, 75, 0.1); }
.chip--cyan { color: var(--cyan); border-color: rgba(59, 245, 212, 0.42); background: rgba(59, 245, 212, 0.1); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: background-color var(--dur) ease, color var(--dur) ease,
              border-color var(--dur) ease, box-shadow var(--dur) ease;
}
.btn--primary { background: var(--cyan); color: var(--ink-2); box-shadow: 0 10px 30px -18px rgba(59, 245, 212, 0.9); }
.btn--primary:hover { background: #7BFFE9; }
.btn--ghost { border-color: var(--line); background: var(--glass); color: var(--white); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(59, 245, 212, 0.08); }
.btn--quiet { min-height: auto; padding-inline: 8px; color: var(--mist); }
.btn--quiet:hover { color: var(--cyan); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 7. 头部 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 6px;
  background: var(--cyan);
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 600;
  transform: translateY(-160%);
  transition: transform var(--dur) ease;
}
.skip-link:focus-visible { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(4, 27, 24, 0.97), rgba(4, 27, 24, 0.86));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.site-header__rail { background: rgba(2, 16, 14, 0.72); border-bottom: 1px solid var(--line-soft); }
.rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 34px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.rail__status { display: flex; align-items: center; gap: 8px; text-transform: uppercase; }
.rail__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(59, 245, 212, 0.16);
}
.rail__label { color: var(--cyan); letter-spacing: 0.18em; }
.rail__text { color: var(--mist); letter-spacing: 0.06em; }
.rail__meta { display: flex; align-items: center; gap: 18px; }
.rail__item { display: inline-flex; align-items: baseline; gap: 5px; color: var(--mist); }
.rail__num { font-family: var(--font-mono); font-size: 12px; color: var(--white); }
.rail__item--gold { color: var(--gold); }

.site-header__bar { position: relative; }
.bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 74px;
  padding-block: 10px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand__mark {
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
  gap: 3px;
  width: 36px;
  height: 36px;
  padding: 7px 0;
  flex: none;
  border: 1px solid rgba(59, 245, 212, 0.35);
  border-radius: 7px;
  background: var(--glass);
}
.brand__mark span { display: block; width: 4px; border-radius: 1px; background: var(--cyan); }
.brand__mark span:nth-child(1) { height: 9px; background: var(--teal); }
.brand__mark span:nth-child(2) { height: 20px; }
.brand__mark span:nth-child(3) { height: 14px; background: var(--gold); }
.brand__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.brand__name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--white);
  white-space: nowrap;
}
.brand__descriptor {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--mist);
  white-space: nowrap;
}

.site-nav { justify-self: end; min-width: 0; }
.site-nav__list { display: flex; align-items: center; gap: 2px; }
.site-nav__item { display: block; }
.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--mist);
  white-space: nowrap;
  transition: color var(--dur) ease, background-color var(--dur) ease, border-color var(--dur) ease;
}
.site-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: rgba(157, 189, 180, 0.62);
  transition: color var(--dur) ease;
}
.site-nav__text { letter-spacing: 0.02em; }
.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--white); background: var(--glass); border-color: var(--line); }
.site-nav__link:hover .site-nav__index,
.site-nav__link:focus-visible .site-nav__index { color: var(--cyan); }
.site-nav__link[aria-current="page"] {
  color: var(--ink-2);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 600;
}
.site-nav__link[aria-current="page"] .site-nav__index { color: rgba(2, 16, 14, 0.6); }

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid rgba(59, 245, 212, 0.45);
  border-radius: 999px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  white-space: nowrap;
  transition: background-color var(--dur) ease, color var(--dur) ease, box-shadow var(--dur) ease;
}
.header-cta::after { content: "→"; font-size: 12px; }
.header-cta:hover,
.header-cta:focus-visible {
  background: var(--cyan);
  color: var(--ink-2);
  box-shadow: 0 10px 26px -14px rgba(59, 245, 212, 0.85);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--glass);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars { display: flex; flex-direction: column; justify-content: center; gap: 3px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform var(--dur) ease, opacity var(--dur) ease;
}
.nav-toggle__label { white-space: nowrap; }
.site-header[data-open="true"] .nav-toggle {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(59, 245, 212, 0.1);
}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(214, 255, 246, 0.07);
}
.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
  transition: width 90ms linear;
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(56px, 8vw, 112px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #08241F, #041B18 42%, #02100E);
}
.footer__top { padding-block: clamp(40px, 6vw, 72px) clamp(32px, 4vw, 56px); }
.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 1fr)) minmax(0, 1.35fr);
  gap: clamp(24px, 3vw, 44px);
}
.footer__brand { display: flex; flex-direction: column; gap: 16px; }
.brand--footer .brand__name { font-size: 19px; }
.footer__tagline { max-width: 34ch; font-size: 14.5px; line-height: 1.8; color: var(--mist); }
.footer__meter { display: flex; align-items: flex-end; gap: 4px; height: 26px; }
.footer__meter span { display: block; width: 6px; border-radius: 1px; background: var(--teal); opacity: 0.85; }
.footer__meter span:nth-child(1) { height: 40%; }
.footer__meter span:nth-child(2) { height: 72%; background: var(--cyan); }
.footer__meter span:nth-child(3) { height: 54%; }
.footer__meter span:nth-child(4) { height: 92%; background: var(--cyan); }
.footer__meter span:nth-child(5) { height: 36%; }
.footer__meter span:nth-child(6) { height: 66%; background: var(--gold); }
.footer__meter span:nth-child(7) { height: 100%; background: var(--cyan); }
.footer__meter span:nth-child(8) { height: 48%; }

.footer__col { display: flex; flex-direction: column; gap: 14px; }
.footer__col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  color: var(--mist);
  transition: color var(--dur) ease;
}
.footer__link::before {
  content: "";
  display: block;
  width: 6px;
  height: 1px;
  background: var(--line);
  transition: background-color var(--dur) ease;
}
.footer__link:hover,
.footer__link:focus-visible { color: var(--white); }
.footer__link:hover::before,
.footer__link:focus-visible::before { background: var(--cyan); }

.contact-list { display: flex; flex-direction: column; gap: 12px; }
.contact-list__row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 14px; }
.contact-list__label {
  min-width: 34px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(157, 189, 180, 0.8);
}
.contact-list__value { color: var(--white); word-break: break-word; }
.footer__note { font-size: 12.5px; line-height: 1.7; color: rgba(157, 189, 180, 0.85); }

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
  transition: color var(--dur) ease, background-color var(--dur) ease, border-color var(--dur) ease;
}
.copy-btn:hover { color: var(--cyan); border-color: rgba(59, 245, 212, 0.5); background: rgba(59, 245, 212, 0.08); }
.copy-btn[data-copied="true"] { background: var(--cyan); border-color: var(--cyan); color: var(--ink-2); }
.copy-btn__note { display: inline-block; }

.footer__bottom { border-top: 1px solid var(--line-soft); background: rgba(2, 16, 14, 0.55); }
.footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(157, 189, 180, 0.86);
}
.footer__icp { color: rgba(157, 189, 180, 0.9); }
.footer__legal-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer__legal-links .footer__link { font-size: 12px; }
.footer__copy { color: rgba(157, 189, 180, 0.6); }

/* ---------- 9. 通用内容组件 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs li + li::before { content: "/"; color: rgba(157, 189, 180, 0.5); }
.breadcrumbs__link { color: var(--mist); transition: color var(--dur) ease; }
.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--white); }

.prose { max-width: 70ch; font-size: 16px; line-height: 1.8; color: var(--mist); }
.prose > * + * { margin-top: 1em; }
.prose h2, .prose h3 { margin-top: 1.8em; color: var(--white); }
.prose h2 { font-size: 1.7rem; }
.prose h3 { font-size: 1.25rem; }
.prose strong { color: var(--white); }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }
.prose blockquote { padding-left: 16px; border-left: 2px solid var(--cyan); color: var(--white); }

.card {
  position: relative;
  padding: clamp(16px, 2.2vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(214, 255, 246, 0.08), rgba(214, 255, 246, 0.02));
  transition: border-color var(--dur) ease, background-color var(--dur) ease;
}
.card:hover { border-color: rgba(59, 245, 212, 0.42); }
.card--solid { background: var(--ink-2); border-color: rgba(214, 255, 246, 0.1); }
.panel {
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-1);
}
.stat {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}
.stat__label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

/* 图像容器：页面阶段直接放入 <img> 或保留纹理占位 */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(59, 245, 212, 0.14), transparent 60%),
    repeating-linear-gradient(90deg, rgba(59, 245, 212, 0.09) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(0deg, rgba(214, 255, 246, 0.06) 0 1px, transparent 1px 56px),
    linear-gradient(180deg, #0A2E28, #041B18);
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.media--wide { aspect-ratio: 21 / 9; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  padding: 3px 9px;
  border: 1px solid rgba(59, 245, 212, 0.45);
  border-radius: 999px;
  background: rgba(2, 16, 14, 0.72);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 14px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  background: linear-gradient(180deg, transparent, rgba(2, 16, 14, 0.88));
}

.tabs { display: flex; flex-direction: column; gap: 20px; }
.tab-list { display: flex; flex-wrap: wrap; gap: 6px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.tab {
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  transition: color var(--dur) ease, background-color var(--dur) ease, border-color var(--dur) ease;
}
.tab:hover { color: var(--white); background: var(--glass); border-color: var(--line); }
.tab[aria-selected="true"] { background: var(--cyan); border-color: var(--cyan); color: var(--ink-2); font-weight: 600; }
.tab-panel { color: var(--mist); }

.accordion { border-top: 1px solid var(--line); }
.accordion__item { border-bottom: 1px solid var(--line); }
.accordion__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 4px;
  text-align: left;
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
  transition: color var(--dur) ease;
}
.accordion__trigger::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}
.accordion__trigger[aria-expanded="true"]::after { content: "–"; }
.accordion__trigger:hover,
.accordion__trigger:focus-visible { color: var(--cyan); }
.accordion__panel { padding: 0 4px 20px; font-size: 15.5px; line-height: 1.8; color: var(--mist); }

.filter-input {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(2, 16, 14, 0.7);
  color: var(--white);
  font: inherit;
  font-size: 15px;
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}
.filter-input::placeholder { color: rgba(157, 189, 180, 0.7); }
.filter-input:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(59, 245, 212, 0.15); }
.filter-empty {
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  text-align: center;
  font-size: 14px;
  color: var(--mist);
}

.spy-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
  font-size: 14px;
  color: var(--mist);
  transition: color var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}
.spy-link:hover { color: var(--white); background: var(--glass); }
.spy-link[aria-current="true"] { color: var(--cyan); border-left-color: var(--cyan); background: rgba(59, 245, 212, 0.08); }

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1080px) {
  .bar { display: flex; align-items: center; gap: 10px; min-height: 68px; }
  .brand { margin-right: auto; }
  .nav-toggle { display: inline-flex; order: 3; }
  .header-cta { order: 2; margin-left: auto; min-height: 36px; padding: 0 12px; font-size: 11px; letter-spacing: 0.08em; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    max-height: calc(100vh - 110px);
    overflow-y: auto;
    padding: 10px clamp(16px, 4vw, 24px) 18px;
    border-bottom: 1px solid var(--line);
    background: rgba(4, 27, 24, 0.985);
    box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.95);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
  }
  .site-header[data-open="true"] .site-nav { display: block; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 12px;
    border-bottom: 1px solid var(--line-soft);
    border-radius: 6px;
    font-size: 15px;
  }
  .site-nav__link[aria-current="page"] { border-color: var(--cyan); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .grid--2, .grid--3, .grid--split { grid-template-columns: minmax(0, 1fr); }
  .rail { font-size: 10px; letter-spacing: 0.08em; }
  .rail__meta { gap: 12px; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .rail__meta { display: none; }
  .brand__name { font-size: 19px; }
  .brand__descriptor { font-size: 9px; letter-spacing: 0.08em; }
  .header-cta { min-height: 34px; padding: 0 10px; }
  .header-cta::after { content: ""; }
  .nav-toggle__label { display: none; }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__bottom-inner { flex-direction: column; align-items: flex-start; gap: 10px; }
  .footer__tagline { max-width: none; }
  .section-head { align-items: flex-start; }
}

/* ---------- 11. 可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .scroll-progress__bar { transition: none; }
}

@media print {
  .site-header, .site-footer, .skip-link, .scroll-progress { display: none !important; }
  body { background: #fff; color: #02100E; }
  body::before { display: none; }
  .prose, .prose p, .prose li { color: #02100E; }
  a { color: #02100E; text-decoration: underline; }
}