/* =====================================================================
   奇博看台 · 共享外壳样式 /assets/site.css
   深墨绿底 + 荧光草绿主色 + 红黄牌信号色，左右分屏骨架
   ===================================================================== */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption, blockquote {
  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%; height: auto; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --field: #061410;
  --stand: #0B2018;
  --seat: #123026;
  --line: #1E4636;
  --turf: #4FE07E;
  --chalk: #EDF5EF;
  --mist: #9BB3A4;
  --red: #E24A3F;
  --yellow: #F3C426;
  --carbon: #0A0C0B;
  --body-text: #CFE0D6;
  --body-text-dim: #B9CDC1;

  --shell-max: 1220px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 80px;
  --header-h-collapsed: 58px;

  --radius-card: 24px;
  --radius-sm: 16px;
  --radius-pill: 999px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --shadow-card: 0 18px 40px rgba(10, 12, 11, .5);
  --shadow-turf: 0 10px 26px rgba(79, 224, 126, .22);

  --font-display: 'Barlow Condensed', 'Oswald', 'Arial Narrow', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-head: 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, 'Courier New', monospace;
}

/* ---------- 3. 基础排版与场地底纹 ---------- */
body {
  min-height: 100vh;
  background-color: var(--field);
  background-image:
    repeating-linear-gradient(115deg, rgba(30, 70, 54, .22) 0 2px, transparent 2px 13px),
    radial-gradient(120% 80% at 8% -12%, rgba(79, 224, 126, .10), transparent 58%),
    radial-gradient(90% 70% at 100% 0%, rgba(18, 48, 38, .8), transparent 62%);
  background-attachment: fixed, fixed, fixed;
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 700; line-height: 1.3; }

:focus-visible {
  outline: 2px solid var(--turf);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: var(--turf); color: var(--carbon); }

.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;
}

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

html.nav-open,
html.nav-open body { overflow: hidden; }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: -72px;
  z-index: 120;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--turf);
  color: var(--carbon);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  transition: top .22s var(--ease);
}
.skip-link:focus { top: 14px; }

/* ---------- 5. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(6, 20, 16, .97), rgba(11, 32, 24, .9));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background-color .26s var(--ease), border-color .26s var(--ease);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--turf), var(--yellow));
  z-index: 90;
  pointer-events: none;
}

.header-bar {
  position: relative;
  z-index: 62;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(12px, 2.4vw, 32px);
  min-height: var(--header-h);
  transition: min-height .26s var(--ease);
}

.site-header[data-collapsed="true"] { background: rgba(6, 20, 16, .96); }
.site-header[data-collapsed="true"] .header-bar { min-height: var(--header-h-collapsed); }
.site-header[data-collapsed="true"] .brand-mark { width: 34px; height: 34px; font-size: 20px; }
.site-header[data-collapsed="true"] .brand-line { display: none; }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  border-radius: var(--radius-sm);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--turf), #2FA85C);
  color: var(--carbon);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -.02em;
  box-shadow: var(--shadow-turf);
  transition: width .26s var(--ease), height .26s var(--ease), font-size .26s var(--ease);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--chalk);
}
.brand-line {
  font-size: 12px;
  color: var(--mist);
  letter-spacing: .08em;
}
.brand:hover .brand-name { color: var(--turf); }

/* 轮次状态胶囊 */
.round-pill {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(18, 48, 38, .7);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}
.round-pill:hover {
  border-color: var(--turf);
  color: var(--chalk);
  background: rgba(18, 48, 38, .95);
}
.round-pill__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--turf);
  box-shadow: 0 0 0 4px rgba(79, 224, 126, .16);
  animation: pillPulse 2.6s var(--ease) infinite;
}
.round-pill__label { display: inline-block; }

@keyframes pillPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}

/* 抽屉按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(18, 48, 38, .7);
  color: var(--chalk);
  min-height: 44px;
  transition: border-color .2s var(--ease);
}
.nav-toggle:hover { border-color: var(--turf); }
.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
}
.nav-toggle__bars {
  position: relative;
  width: 18px;
  height: 12px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .24s var(--ease), top .24s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { top: 10px; }
.nav-toggle[aria-expanded="true"] { border-color: var(--turf); color: var(--turf); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 5px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 5px; transform: rotate(-45deg); }

/* 主导航 */
.site-nav { justify-self: end; display: block; }
.site-nav__list { display: flex; align-items: center; gap: 2px; }
.site-nav__item { display: block; }
.site-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
  white-space: nowrap;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.site-nav__link:hover { color: var(--chalk); background: rgba(30, 70, 54, .55); }
.site-nav__link[aria-current="page"] {
  color: var(--carbon);
  background: var(--turf);
}
.site-nav__link[aria-current="page"]:hover { color: var(--carbon); background: var(--turf); }

/* 抽屉内快捷入口（桌面隐藏） */
.nav-utility { display: none; }
.nav-utility__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
}
.nav-utility__link {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  background: rgba(30, 70, 54, .5);
  font-size: 14px;
  color: var(--chalk);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.nav-utility__link:hover { background: rgba(79, 224, 126, .16); color: var(--turf); }

/* 遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 61;
  background: rgba(6, 20, 16, .72);
  opacity: 0;
  pointer-events: none;
  transition: opacity .24s var(--ease);
}
.nav-scrim[data-open="true"] { opacity: 1; pointer-events: auto; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 96px);
  background: linear-gradient(180deg, var(--stand), var(--field));
  border-top: 1px solid var(--line);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 2fr;
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(36px, 6vw, 64px);
}

.footer-brand__name {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .02em;
}
.footer-brand__line {
  margin-top: 8px;
  max-width: 32ch;
  color: var(--mist);
  font-size: 14px;
}

.footer-meta { display: grid; gap: 10px; margin-top: 22px; }
.footer-meta li {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 10px;
  font-size: 13px;
}
.footer-meta__label {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}
.footer-meta__value { color: var(--chalk); word-break: break-word; }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
}
.footer-col { display: block; }
.footer-col__heading {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--turf);
}
.footer-col__list { display: grid; gap: 8px; margin-top: 14px; }
.footer-col__link {
  display: inline-block;
  padding-block: 2px;
  font-size: 14px;
  color: var(--mist);
  transition: color .2s var(--ease), transform .2s var(--ease);
}
.footer-col__link:hover { color: var(--turf); transform: translateX(3px); }

.footer-bottom {
  display: grid;
  gap: 8px;
  padding-block: 20px;
  border-top: 1px solid var(--line);
}
.footer-legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}
.footer-note {
  max-width: 72ch;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(155, 179, 164, .82);
}

/* ---------- 7. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .2s var(--ease), background-color .2s var(--ease),
              border-color .2s var(--ease), color .2s var(--ease);
}
.btn--primary {
  background: var(--turf);
  color: var(--carbon);
  box-shadow: var(--shadow-turf);
}
.btn--primary:hover { transform: translateY(-2px); background: #63E98E; }
.btn--ghost {
  background: rgba(18, 48, 38, .5);
  border-color: var(--line);
  color: var(--chalk);
}
.btn--ghost:hover { border-color: var(--turf); color: var(--turf); transform: translateY(-2px); }

/* ---------- 8. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}
.crumbs__item { display: inline-flex; align-items: center; gap: 8px; }
.crumbs__item[aria-current="page"] { color: var(--chalk); }
.crumbs__link { color: var(--mist); transition: color .2s var(--ease); }
.crumbs__link:hover { color: var(--turf); }
.crumbs__sep { color: rgba(155, 179, 164, .5); }

/* ---------- 9. 正文容器 ---------- */
.prose { max-width: 70ch; font-size: 16px; }
.prose > * + * { margin-top: 18px; }
.prose h2 {
  margin-top: 42px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.35;
}
.prose h3 {
  margin-top: 30px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 22px);
}
.prose p { color: var(--body-text); }
.prose strong { color: var(--chalk); }
.prose ul, .prose ol { display: grid; gap: 10px; }
.prose li {
  position: relative;
  padding-left: 22px;
  color: var(--body-text-dim);
}
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 9px;
  height: 2px;
  border-radius: 2px;
  background: var(--turf);
}
.prose a {
  color: var(--turf);
  border-bottom: 1px solid rgba(79, 224, 126, .4);
  transition: border-color .2s var(--ease);
}
.prose a:hover { border-bottom-color: var(--turf); }
.prose code {
  padding: 2px 7px;
  border-radius: 8px;
  background: rgba(30, 70, 54, .7);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--turf);
}
.prose blockquote {
  padding: 14px 20px;
  border-left: 2px solid var(--turf);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(18, 48, 38, .55);
  color: var(--body-text);
}

/* ---------- 10. 栅格与分屏骨架 ---------- */
.grid { display: grid; gap: clamp(16px, 2.4vw, 24px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.split {
  display: grid;
  grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
  gap: clamp(20px, 3vw, 48px);
  align-items: start;
}

/* ---------- 11. 卡片与标签 ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--seat);
  transition: border-color .24s var(--ease), transform .24s var(--ease), box-shadow .24s var(--ease);
}
.card:hover {
  border-color: var(--turf);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.card__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}
.card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}
.card__body {
  margin-top: 10px;
  font-size: 15px;
  color: var(--body-text-dim);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(30, 70, 54, .5);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  white-space: nowrap;
}
.tag--green {
  border-color: rgba(79, 224, 126, .4);
  background: rgba(79, 224, 126, .1);
  color: var(--turf);
}
.tag--yellow {
  border-color: transparent;
  background: var(--yellow);
  color: var(--carbon);
}
.tag--red {
  border-color: transparent;
  background: var(--red);
  color: var(--chalk);
}

/* ---------- 12. 数字 ---------- */
.stat {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 800;
  line-height: .92;
  letter-spacing: -.02em;
  color: var(--turf);
  font-variant-numeric: tabular-nums;
}

.score {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(44px, 7vw, 112px);
  font-weight: 800;
  line-height: .85;
  letter-spacing: -.02em;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
}
.score--turf { color: var(--turf); }

/* ---------- 13. 坐标索引 ---------- */
.rail { position: sticky; top: calc(var(--header-h-collapsed) + 24px); }
.rail__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--turf);
}
.rail__list {
  display: grid;
  gap: 2px;
  margin-top: 14px;
  border-left: 1px solid var(--line);
}
.rail__link {
  display: block;
  margin-left: -1px;
  padding: 8px 0 8px 16px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--mist);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.rail__link:hover { color: var(--chalk); }
.rail__link[aria-current="true"] {
  color: var(--turf);
  border-left-color: var(--turf);
}

/* ---------- 14. 章节 ---------- */
.section { padding-block: clamp(36px, 6vw, 72px); }
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 32px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--turf);
}
.section__title {
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1.2;
}
.section__note {
  max-width: 46ch;
  font-size: 14px;
  color: var(--mist);
}

/* ---------- 15. 横向赛程带 ---------- */
.rail-scroll {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 12px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-color: var(--line) transparent;
  scrollbar-width: thin;
}
.rail-scroll > * {
  flex: 0 0 clamp(240px, 30vw, 320px);
  scroll-snap-align: start;
}
.rail-scroll::-webkit-scrollbar { height: 6px; }
.rail-scroll::-webkit-scrollbar-track { background: transparent; }
.rail-scroll::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: var(--radius-pill);
}

/* ---------- 16. 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: linear-gradient(150deg, var(--seat), var(--stand));
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.media:hover > img { transform: scale(1.03); }
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(115deg, rgba(79, 224, 126, .06) 0 2px, transparent 2px 14px);
}
.media__caption {
  margin-top: 10px;
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 17. 主题筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.filter-btn {
  padding: 8px 16px;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(18, 48, 38, .6);
  color: var(--mist);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.filter-btn:hover { color: var(--chalk); border-color: var(--turf); }
.filter-btn[aria-pressed="true"] {
  background: var(--yellow);
  border-color: transparent;
  color: var(--carbon);
}
[data-filter-item][hidden] { display: none; }
.filter-empty {
  display: none;
  padding: 18px 20px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-card);
  color: var(--mist);
  font-size: 14px;
}
.filter-empty[data-visible="true"] { display: block; }

/* ---------- 18. 显现动效 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .24s var(--ease), transform .24s var(--ease);
}
.js [data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: none;
}

/* ---------- 19. 响应式 ---------- */
@media (max-width: 1080px) {
  .header-bar {
    grid-template-columns: 1fr auto;
    min-height: 66px;
    gap: 12px;
  }
  .round-pill { display: none; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 70;
    display: flex;
    flex-direction: column;
    gap: 22px;
    width: min(86vw, 340px);
    padding: 92px 22px 40px;
    overflow-y: auto;
    background: var(--stand);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform .3s var(--ease), visibility .3s var(--ease);
  }
  .site-nav[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .site-nav__link {
    justify-content: flex-start;
    padding: 14px 16px;
    font-size: 17px;
  }
  .nav-utility {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
  }

  .split { grid-template-columns: minmax(0, 1fr); }
  .rail { position: static; }
  .rail__list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    border-left: 0;
  }
  .rail__link {
    margin-left: 0;
    padding: 8px 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
  }
  .rail__link[aria-current="true"] {
    border-color: var(--turf);
    background: rgba(79, 224, 126, .12);
  }
}

@media (max-width: 900px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  body { font-size: 15.5px; }
  .brand-line { display: none; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .footer-meta li { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .section__head { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .rail-scroll > * { flex: 0 0 82%; }
  .btn { width: 100%; }
}

/* ---------- 20. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .site-nav { transition: none; }
}