/* =========================================================
   博奥体育主站 · 共享样式 /assets/site.css
   夜间赛场记分牌：深墨蓝底 + 电子青数据 + 荧光橙行动
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

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

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

img, svg, video { max-width: 100%; }
img { border: 0; }

button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 颜色 */
  --c-ink-900: #060B1A;
  --c-ink-800: #0C1530;
  --c-ink-700: #14203F;
  --c-line: #2A3A5C;
  --c-cyan: #22E0FF;
  --c-orange: #FF7A1A;
  --c-orange-soft: #FFB066;
  --c-mint: #4FE3B0;
  --c-white: #F2F6FF;
  --c-text: #C8D4E8;
  --c-muted: #8A9BB8;
  --c-band: #0A2E4E;

  /* 字体 */
  --f-mono: "DIN Alternate", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --f-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  /* 尺度 */
  --layout-max: 1240px;
  --frame-w: 3px;
  --shadow-hard: 8px 8px 0 rgba(3, 7, 18, .85);
  --radius: 2px;
  --pad-x: clamp(14px, 2vw, 24px);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  color: var(--c-text);
  background-color: var(--c-ink-900);
  background-image:
    radial-gradient(920px 560px at 8% -6%, rgba(34, 224, 255, .11), transparent 62%),
    radial-gradient(820px 520px at 100% 1%, rgba(255, 122, 26, .09), transparent 64%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { color: var(--c-white); font-weight: 700; line-height: 1.3; }
h1 { font-size: clamp(28px, 4.4vw, 44px); letter-spacing: -.01em; }
h2 { font-size: clamp(22px, 2.8vw, 28px); }
h3 { font-size: clamp(18px, 2vw, 20px); }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

::selection { background: var(--c-cyan); color: #04121a; }

:focus-visible {
  outline: 3px solid var(--c-cyan);
  outline-offset: 2px;
  border-radius: 1px;
}

#main-content { scroll-margin-top: 96px; }

/* ---------- 4. 工具与布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--layout-max);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}

.prose { max-width: 40em; color: var(--c-text); }
.prose p { margin: 0 0 1em; }

.stack { display: grid; gap: clamp(12px, 1.8vw, 20px); }

.grid { display: grid; gap: clamp(14px, 2vw, 24px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }

.mono {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.data-line {
  display: block;
  height: 2px;
  width: 100%;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--c-cyan) 14%, var(--c-line) 62%, transparent);
  opacity: .75;
}

/* ---------- 5. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  left: 12px;
  top: -80px;
  z-index: 200;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 700;
  color: #04121a;
  background: var(--c-cyan);
  border-radius: var(--radius);
  text-decoration: none;
  transition: top .18s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- 6. 页头框架 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(6, 11, 26, .95);
  border-bottom: var(--frame-w) solid var(--c-line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: box-shadow .2s ease, background-color .2s ease;
}
.site-header[data-scrolled] {
  background: rgba(6, 11, 26, .99);
  box-shadow: 0 14px 30px rgba(2, 6, 16, .7);
}

.site-header__progress {
  position: absolute;
  left: 0; right: 0; bottom: calc(-1 * var(--frame-w));
  height: var(--frame-w);
  background: rgba(42, 58, 92, .55);
  overflow: hidden;
  pointer-events: none;
}
.site-header__progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
  transition: width .12s linear;
}

.site-header__frame {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 24px);
  width: 100%;
  max-width: var(--layout-max);
  min-height: 74px;
  margin: 0 auto;
  padding: 10px var(--pad-x);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 4px 2px;
  text-decoration: none;
}
.brand__mark {
  position: relative;
  flex: none;
  width: 28px;
  height: 28px;
  border: 2px solid var(--c-cyan);
  background: linear-gradient(180deg, rgba(34, 224, 255, .26), rgba(34, 224, 255, 0));
}
.brand__mark::before {
  content: "";
  position: absolute;
  left: 4px; right: 4px; top: 6px;
  height: 2px;
  background: var(--c-cyan);
  box-shadow: 0 5px 0 rgba(34, 224, 255, .42);
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 4px; right: 4px; bottom: 4px;
  height: 4px;
  background: var(--c-orange);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: .02em;
}
.brand__tagline {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-muted);
}
.brand:hover .brand__name { color: var(--c-cyan); }
.brand:hover .brand__mark { border-color: var(--c-white); }

/* 主导航 */
.site-nav { flex: 1 1 auto; min-width: 0; }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
}
.site-nav__item { flex: 0 0 auto; }
.site-nav__link {
  display: block;
  padding: 10px 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: color .16s ease, border-color .16s ease, background-color .16s ease;
}
.site-nav__link:hover {
  color: var(--c-white);
  background: var(--c-ink-800);
  border-color: var(--c-line);
}
.site-nav__link[aria-current="page"] {
  color: var(--c-cyan);
  border-color: rgba(34, 224, 255, .55);
  background: linear-gradient(180deg, rgba(34, 224, 255, .16), rgba(34, 224, 255, .02));
}

/* 右侧区 */
.site-header__side {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  margin-left: auto;
}
.site-header__cta { flex: 0 0 auto; }

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-mint);
  border: 1px solid rgba(79, 227, 176, .45);
  border-radius: var(--radius);
}
.live-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-mint);
  box-shadow: 0 0 0 0 rgba(79, 227, 176, .6);
  animation: live-pulse 2.2s ease-out infinite;
}
@keyframes live-pulse {
  0% { box-shadow: 0 0 0 0 rgba(79, 227, 176, .55); }
  70% { box-shadow: 0 0 0 7px rgba(79, 227, 176, 0); }
  100% { box-shadow: 0 0 0 0 rgba(79, 227, 176, 0); }
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  position: relative;
  flex: none;
  width: 46px;
  height: 42px;
  padding: 0;
  background: var(--c-ink-800);
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  cursor: pointer;
}
.nav-toggle__bar {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--c-cyan);
  transition: transform .18s ease, opacity .18s ease;
}
.nav-toggle__bar:nth-child(1) { top: 13px; }
.nav-toggle__bar:nth-child(2) { top: 19px; }
.nav-toggle__bar:nth-child(3) { top: 25px; }
.site-header[data-open] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--f-sans);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .04em;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
}
.btn--primary {
  color: #120701;
  background: var(--c-orange);
  border-color: var(--c-orange);
  box-shadow: 4px 4px 0 rgba(3, 7, 18, .9);
}
.btn--primary:hover {
  background: var(--c-orange-soft);
  border-color: var(--c-orange-soft);
}
.btn--primary:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 rgba(3, 7, 18, .9); }

.btn--ghost {
  color: var(--c-cyan);
  background: transparent;
  border-color: var(--c-cyan);
}
.btn--ghost:hover { background: rgba(34, 224, 255, .14); color: var(--c-white); }

/* ---------- 8. 画板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 3vw, 32px);
  margin: 0 0 clamp(18px, 3.4vw, 36px);
  background-color: var(--c-ink-800);
  background-image: linear-gradient(158deg, rgba(10, 46, 78, .55), rgba(12, 21, 48, 0) 56%);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
}
.panel__index {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 3px 9px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-cyan);
  border: 1px solid rgba(34, 224, 255, .4);
  border-radius: var(--radius);
}
.panel__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--c-muted);
}
.panel__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-white);
}
.panel__text { max-width: 40em; color: var(--c-text); }

/* ---------- 9. 章节抬头 ---------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
}
.section-head__index {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-orange);
}
.section-head__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 700;
  color: var(--c-white);
}

/* ---------- 10. 模块索引条 ---------- */
.rail {
  margin: clamp(18px, 3vw, 32px) 0;
  background: var(--c-ink-800);
  border-top: 2px solid var(--c-line);
  border-bottom: 2px solid var(--c-line);
}
.rail__track {
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--c-line) transparent;
}
.rail__track::-webkit-scrollbar { height: 6px; }
.rail__track::-webkit-scrollbar-track { background: transparent; }
.rail__track::-webkit-scrollbar-thumb { background: var(--c-line); }
.rail__item { flex: 0 0 auto; scroll-snap-align: start; }
.rail__link {
  display: block;
  padding: 14px 18px;
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-muted);
  text-decoration: none;
  white-space: nowrap;
  border-right: 1px solid var(--c-line);
  transition: color .16s ease, background-color .16s ease;
}
.rail__link:hover { color: var(--c-white); background: var(--c-ink-700); }
.rail__link[aria-current="true"] {
  color: var(--c-cyan);
  background: linear-gradient(180deg, rgba(34, 224, 255, .16), transparent 92%);
  box-shadow: inset 0 -3px 0 var(--c-cyan);
}

/* ---------- 11. 标签 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-cyan);
  background: var(--c-ink-700);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: color .16s ease, background-color .16s ease, border-color .16s ease;
}
.chip:hover { color: var(--c-white); border-color: var(--c-cyan); }
.chip--active {
  color: #04121a;
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}
.chip--mint { color: var(--c-mint); border-color: rgba(79, 227, 176, .45); }
.chip--orange { color: var(--c-orange); border-color: rgba(255, 122, 26, .5); }

/* ---------- 12. 数字锚点 ---------- */
.stat { display: block; }
.stat__value {
  display: block;
  font-family: var(--f-mono);
  font-weight: 800;
  font-size: clamp(32px, 5.6vw, 64px);
  line-height: 1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--c-white);
}
.stat__value--cyan { color: var(--c-cyan); }
.stat__value--orange { color: var(--c-orange); }
.stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-muted);
}

/* ---------- 13. 提示条 ---------- */
.note {
  margin: 16px 0 0;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-ink-700);
  border-left: 3px solid var(--c-cyan);
}
.note--mint { border-left-color: var(--c-mint); }
.note--orange { border-left-color: var(--c-orange); }

/* ---------- 14. 面包屑 ---------- */
.breadcrumb { margin: 22px 0 20px; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-muted);
}
.breadcrumb__item { display: flex; align-items: center; gap: 8px; }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; color: var(--c-line); }
.breadcrumb__link { color: var(--c-cyan); text-decoration: none; }
.breadcrumb__link:hover { text-decoration: underline; }
.breadcrumb__current { color: var(--c-text); }

/* ---------- 15. 视觉容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--c-ink-700);
  background-image: linear-gradient(150deg, var(--c-band), var(--c-ink-700) 46%, var(--c-ink-800));
  border: 2px solid var(--c-line);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(34, 224, 255, .18) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(0deg, rgba(42, 58, 92, .5) 0 1px, transparent 1px 46px);
  opacity: .55;
}
.media-frame::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
}
.media-frame__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}
.media-frame > img,
.media-frame > svg,
.media-frame > .media-frame__inner > svg {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame__caption {
  display: block;
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-muted);
}

/* ---------- 16. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 88px);
  background-color: var(--c-ink-800);
  background-image: linear-gradient(180deg, rgba(10, 46, 78, .8), rgba(12, 21, 48, 0) 46%);
  border-top: var(--frame-w) solid var(--c-line);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: calc(-1 * var(--frame-w));
  left: 0;
  height: var(--frame-w);
  width: min(320px, 34%);
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
}

.site-footer__frame {
  width: 100%;
  max-width: var(--layout-max);
  margin: 0 auto;
  padding: clamp(32px, 4.6vw, 56px) var(--pad-x) 0;
}

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 1fr)) minmax(0, 1.25fr);
  gap: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(26px, 3.4vw, 42px);
  border-bottom: 1px solid var(--c-line);
}

.site-footer__brand { min-width: 0; }
.footer-brand__name {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-white);
}
.footer-brand__signature {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-cyan);
}
.footer-brand__note {
  max-width: 34em;
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-muted);
}

.footer-col { min-width: 0; }
.footer-col__title {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--c-muted);
}
.footer-col__title::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  margin-top: 9px;
  background: var(--c-orange);
}

.footer-links { display: grid; gap: 10px; }
.footer-links a {
  display: inline-block;
  font-size: 14px;
  line-height: 1.55;
  color: var(--c-text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}
.footer-links a:hover { color: var(--c-cyan); border-bottom-color: var(--c-cyan); }

.footer-contact { display: grid; gap: 12px; }
.footer-contact li { display: grid; gap: 3px; }
.footer-contact__key {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-muted);
}
.footer-contact__val {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-white);
  overflow-wrap: anywhere;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding: 16px 0 26px;
}
.site-footer__legal {
  margin: 0 auto 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-muted);
}
.site-footer__icp {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-muted);
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-cyan);
  background: var(--c-ink-700);
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color .16s ease, border-color .16s ease, background-color .16s ease;
}
.to-top::before { content: "↑"; font-size: 13px; }
.to-top:hover {
  color: var(--c-white);
  background: var(--c-ink-900);
  border-color: var(--c-cyan);
}

/* ---------- 17. 滚动显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .24s ease, transform .24s ease;
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1180px) {
  .site-nav__link { padding: 10px 9px; font-size: 14px; }
}

@media (max-width: 1060px) {
  .live-badge { display: none; }
}

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--asym { grid-template-columns: minmax(0, 1fr); }

  .site-header__frame {
    flex-wrap: wrap;
    min-height: 64px;
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .brand__tagline { display: none; }
  .site-header__side { gap: 8px; }
  .site-header__cta { font-size: 13px; padding: 8px 12px; }
  .nav-toggle { display: block; }

  .site-nav {
    order: 3;
    flex: 1 0 100%;
    display: none;
    width: 100%;
    margin-top: 10px;
    padding: 10px 0 6px;
    border-top: 2px solid var(--c-line);
  }
  .site-header[data-open] .site-nav { display: block; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .site-nav__link {
    padding: 12px 10px;
    font-size: 16px;
    border: 1px solid transparent;
    border-left-width: 3px;
  }
  .site-nav__link[aria-current="page"] {
    border-color: transparent;
    border-left-color: var(--c-cyan);
    background: linear-gradient(90deg, rgba(34, 224, 255, .14), transparent 70%);
  }

  .site-footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  .site-footer__top { grid-template-columns: minmax(0, 1fr); }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }
  .site-footer__legal { margin-right: 0; }
  .rail__link { padding: 12px 14px; font-size: 12px; }
}

@media (max-width: 420px) {
  .brand__name { font-size: 14px; }
  .site-header__cta { font-size: 12px; padding: 7px 10px; letter-spacing: .02em; }
  .footer-brand__name { font-size: 16px; }
}

/* ---------- 19. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .live-badge__dot { animation: none; }
  .site-header__progress-bar { transition: none; }
}