/* ============================================================
   宝威赛场 · 共享样式表 /assets/site.css
   夜墨底 · 看台绿 · 荧光青 · 珊瑚橙
   ============================================================ */

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

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

body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
hr { border: 0; border-top: 1px solid var(--line); }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩 */
  --ink: #06140F;
  --stand: #0C2119;
  --raise: #132E24;
  --line: #1F4A3A;
  --muted: #8FA9A0;
  --text: #F2FBF7;
  --cyan: #6FE7C4;
  --cyan-soft: #B6F7E4;
  --coral: #FF7A54;
  --coral-soft: #FFC0AB;
  --dim: #3E5C52;

  /* 形状 */
  --r-s: 18px;
  --r-m: 28px;
  --r-p: 999px;
  --skew: -6deg;

  /* 尺寸 */
  --header-h: 68px;
  --rail-w: 216px;
  --rail-now: 0px;
  --container: 1180px;
  --gutter: clamp(16px, 4vw, 40px);

  /* 动效 */
  --ease: cubic-bezier(.2, .7, .3, 1);
  --t: 200ms;

  /* 字体 */
  --font-head: "Arial Narrow", "Helvetica Neue", Helvetica, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. 排版基础 ---------- */
body {
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-left: var(--rail-now);
  -webkit-font-smoothing: antialiased;
  transition: padding-left var(--t) var(--ease);
}

main { display: block; flex: 1 0 auto; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text);
}

h1 { font-size: clamp(34px, 5.4vw, 48px); font-weight: 900; }
h2 { font-size: clamp(26px, 3.6vw, 36px); }
h3 { font-size: clamp(20px, 2.6vw, 28px); }
h4 { font-size: 22px; }

p { max-width: 34em; }

strong { font-weight: 600; color: var(--cyan-soft); }

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

/* ---------- 4. 焦点与跳转 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 300;
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--r-p);
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  transition: top var(--t) var(--ease);
}
.skip-link:focus { top: 14px; }

/* ---------- 5. 容器与区块 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide { max-width: 1440px; }

.section { padding-block: clamp(44px, 7vw, 92px); }

.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.section__title { margin-bottom: 14px; }
.section__lead { color: var(--muted); max-width: 32em; }

.slash {
  display: inline-block;
  width: 34px;
  height: 3px;
  background: var(--cyan);
  transform: skewX(-24deg);
  vertical-align: middle;
  margin-right: 10px;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--r-p);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--t) var(--ease), color var(--t) var(--ease),
              border-color var(--t) var(--ease), transform var(--t) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--coral { background: var(--coral); color: #1B0A03; font-weight: 600; }
.btn--coral:hover { background: var(--coral-soft); }

.btn--cyan { background: var(--cyan); color: var(--ink); font-weight: 600; }
.btn--cyan:hover { background: var(--cyan-soft); }

.btn--ghost { background: transparent; border-color: var(--line); color: var(--text); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.btn--sm { padding: 8px 15px; font-size: 13.5px; }

/* ---------- 7. 标签 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--r-p);
  border: 1px solid var(--line);
  background: var(--raise);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.4;
}
.chip--coral { background: var(--coral); border-color: var(--coral); color: #1B0A03; font-weight: 600; }
.chip--muted { background: transparent; color: var(--dim); border-color: var(--line); }

/* ---------- 8. 站点头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(6, 20, 15, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: var(--header-h);
  max-width: 1500px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  transition: opacity var(--t) var(--ease);
}
.brand:hover { opacity: 0.86; }

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: 12px 12px 12px 3px;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  line-height: 1;
}

.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--text);
}
.brand__tagline {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-p);
  background: var(--raise);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-toggle__text { font-family: var(--font-mono); letter-spacing: 0.08em; }

/* ---------- 9. 导航（移动端为底部索引面板） ---------- */
.main-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-height: 84vh;
  overflow-y: auto;
  padding: 22px var(--gutter) calc(26px + env(safe-area-inset-bottom, 0px));
  background: var(--stand);
  border-top: 1px solid var(--line);
  border-radius: var(--r-m) var(--r-m) 0 0;
  transform: translateY(105%);
  visibility: hidden;
  transition: transform 240ms var(--ease), visibility 240ms var(--ease);
}
.main-nav[data-open="true"] { transform: translateY(0); visibility: visible; }

.nav-list { display: flex; flex-direction: column; }
.nav-item { border-bottom: 1px solid var(--line); }
.nav-item:last-child { border-bottom: 0; }

.nav-link {
  position: relative;
  display: block;
  padding: 14px 4px 14px 14px;
  font-size: 17px;
  font-weight: 500;
  color: var(--muted);
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: var(--r-p);
  background: var(--cyan);
  transform: translateY(-50%);
  transition: height var(--t) var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-link[aria-current="page"] { color: var(--cyan); font-weight: 600; }
.nav-link[aria-current="page"]::before { height: 20px; }

.nav-foot { display: flex; flex-direction: column; gap: 12px; }
.nav-foot__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
  max-width: none;
}

.header-actions { display: none; }

/* ---------- 10. 阅读进度 ---------- */
.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--line);
  overflow: hidden;
}
.read-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* ---------- 11. 左侧悬浮数据栏 ---------- */
.side-rail {
  position: fixed;
  left: 12px;
  bottom: 96px;
  z-index: 55;
  width: auto;
  max-width: calc(100vw - 24px);
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  overflow: hidden;
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.52);
}

.rail-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 16px;
  cursor: pointer;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  transition: color var(--t) var(--ease);
}
.rail-toggle:hover { color: var(--cyan-soft); }
.rail-toggle__icon {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--coral);
  transform: skewX(var(--skew));
  flex: 0 0 auto;
}

.rail-panel {
  display: none;
  padding: 4px 16px 16px;
  border-top: 1px solid var(--line);
}
.side-rail[data-open="true"] .rail-panel { display: block; }

.rail-block { padding: 14px 0; border-bottom: 1px solid var(--line); }
.rail-block:last-of-type { border-bottom: 0; }
.rail-block__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
  max-width: none;
}

.rail-score {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 8px;
}
.rail-score__cell {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-soft);
  font-variant-numeric: tabular-nums;
}
.rail-score__sep {
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--coral);
}
.rail-score__unit {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-left: auto;
}
.rail-note {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* 订阅开关 */
.switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 0;
  cursor: pointer;
}
.switch__track {
  position: relative;
  display: block;
  width: 46px;
  height: 26px;
  flex: 0 0 auto;
  border-radius: var(--r-p);
  border: 1px solid var(--line);
  background: var(--ink);
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}
.switch__thumb {
  position: absolute;
  left: 3px;
  top: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--dim);
  transform: translateY(-50%);
  transition: transform var(--t) var(--ease), background var(--t) var(--ease);
}
.switch__text {
  font-size: 13.5px;
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  transition: color var(--t) var(--ease);
}
.switch[aria-pressed="true"] .switch__track { background: var(--coral); border-color: var(--coral); }
.switch[aria-pressed="true"] .switch__thumb { background: var(--ink); transform: translateY(-50%) translateX(20px); }
.switch[aria-pressed="true"] .switch__text { color: var(--coral-soft); }

.rail-status {
  font-size: 12px;
  line-height: 1.6;
  color: var(--dim);
  margin-top: 4px;
  max-width: none;
}

.rail-cta { width: 100%; margin-top: 12px; }

/* ---------- 12. 站点页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 72px;
  background: var(--stand);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -36px;
  height: 36px;
  background: var(--stand);
  clip-path: polygon(0 100%, 100% 0, 100% 100%, 0 100%);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
  max-width: var(--container);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) clamp(28px, 4vw, 44px);
}

.footer-brand { display: flex; flex-direction: column; gap: 16px; }
.brand--footer .brand__name { font-size: 18px; }
.brand--footer .brand__tagline { color: var(--cyan); }

.footer-note { font-size: 14px; line-height: 1.75; color: var(--muted); max-width: 32em; }
.footer-note--small { font-size: 12.5px; color: var(--dim); margin-top: 4px; }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: 13.5px;
  max-width: none;
}
.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--dim);
  min-width: 68px;
  padding-top: 3px;
}
.footer-contact__value { color: var(--text); font-variant-numeric: tabular-nums; }

.footer-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px 24px;
}
.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 14px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-link {
  font-size: 14.5px;
  color: var(--muted);
  transition: color var(--t) var(--ease), padding-left var(--t) var(--ease);
}
.footer-link:hover { color: var(--cyan); padding-left: 6px; }

.footer-bottom { border-top: 1px solid var(--line); background: var(--ink); }
.footer-bottom__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--container);
  margin-inline: auto;
  padding: 18px var(--gutter);
}
.footer-icp,
.footer-copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--dim);
  max-width: none;
}
.footer-copy { color: var(--muted); }

/* ---------- 13. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
}
.crumbs__item { display: inline-flex; align-items: center; gap: 8px; }
.crumbs__item + .crumbs__item::before { content: "/"; color: var(--line); }
.crumbs__item a { color: var(--muted); transition: color var(--t) var(--ease); }
.crumbs__item a:hover { color: var(--cyan); }
.crumbs__item[aria-current="page"] { color: var(--cyan); }

/* ---------- 14. 网格与卡片 ---------- */
.grid { display: grid; gap: clamp(18px, 2.4vw, 28px); grid-template-columns: minmax(0, 1fr); }
.grid--2,
.grid--3,
.grid--sidebar { grid-template-columns: minmax(0, 1fr); }

.offset-up { transform: translateY(-24px); }
.offset-down { transform: translateY(24px); }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 3vw, 28px);
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}
.card:hover { border-color: var(--cyan); transform: translateY(-4px); }

.card__index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--coral);
}
.card__title {
  font-family: var(--font-head);
  font-size: clamp(20px, 2.4vw, 24px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
}
.card__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.card__body { font-size: 15px; color: var(--muted); line-height: 1.7; }
.card__body p { max-width: none; }

/* 数据块 */
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(40px, 7vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--cyan-soft);
  font-variant-numeric: tabular-nums;
}
.stat__value--coral { color: var(--coral); }
.stat__value--sm { font-size: clamp(28px, 4vw, 40px); }
.stat__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- 15. 媒体容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-m);
  border: 1px solid var(--line);
  background: var(--stand);
  aspect-ratio: 16 / 9;
}
.media img,
.media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06) brightness(0.86);
}
.media--21x9 { aspect-ratio: 21 / 9; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--tinted::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(6, 20, 15, 0.34);
  pointer-events: none;
}
.media--corner { border-radius: var(--r-m) var(--r-m) var(--r-m) 4px; }
.media__caption {
  position: absolute;
  left: 18px;
  bottom: 16px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
  text-shadow: 0 2px 12px rgba(6, 20, 15, 0.9);
}

/* ---------- 16. 长文 ---------- */
.prose { max-width: 34em; }
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 1.7em; margin-bottom: 0.5em; }
.prose h3 { margin-top: 1.4em; margin-bottom: 0.4em; }
.prose p { max-width: none; color: var(--text); }
.prose li { position: relative; padding-left: 18px; margin-top: 0.55em; color: var(--muted); }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}
.prose a { color: var(--cyan); border-bottom: 1px solid var(--line); }
.prose a:hover { border-bottom-color: var(--cyan); }
.prose blockquote {
  padding: 14px 20px;
  border-left: 3px solid var(--coral);
  background: var(--rise, var(--raise));
  border-radius: 0 var(--r-s) var(--r-s) 0;
  color: var(--muted);
}

/* ---------- 17. 表格与提示 ---------- */
.data-table { font-size: 15px; }
.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.data-table th {
  background: var(--raise);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.data-table .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--cyan-soft);
}
.data-table tbody tr:hover td { background: rgba(19, 46, 36, 0.6); }

.notice {
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--r-s) var(--r-s) 0;
  background: var(--raise);
  font-size: 14.5px;
  color: var(--muted);
}
.notice--coral { border-left-color: var(--coral); }
.notice p { max-width: none; }

/* ---------- 18. 显现 ---------- */
html[data-reveal-ready="true"] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}
html[data-reveal-ready="true"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 240ms var(--ease), transform 240ms var(--ease);
}

/* ---------- 19. 平板 ---------- */
@media (min-width: 700px) {
  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--sidebar { grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); }
}

/* ---------- 20. 桌面 ---------- */
@media (min-width: 900px) {
  .nav-toggle { display: none; }

  .header-actions { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }

  .main-nav {
    position: static;
    transform: none;
    visibility: visible;
    max-height: none;
    overflow: visible;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    flex: 1 1 auto;
    flex-direction: row;
    justify-content: center;
    gap: 0;
    transition: none;
  }

  .nav-list { flex-direction: row; align-items: center; gap: clamp(2px, 0.9vw, 12px); }
  .nav-item { border-bottom: 0; }

  .nav-link {
    display: inline-flex;
    align-items: center;
    padding: 10px 14px 10px 18px;
    font-size: 15px;
    border-radius: var(--r-p);
  }
  .nav-link::before { left: 5px; }
  .nav-link[aria-current="page"]::before { height: 18px; }
  .nav-link::after {
    content: attr(data-count) " 条";
    position: absolute;
    left: 50%;
    top: calc(100% - 8px);
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.06em;
    color: var(--cyan);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t) var(--ease);
  }
  .nav-link:hover::after,
  .nav-link:focus-visible::after { opacity: 1; }

  .nav-foot { display: none; }

  .footer-inner { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.6fr); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- 21. 宽屏：数据栏常驻轨道 ---------- */
@media (min-width: 1180px) {
  body { --rail-now: var(--rail-w); }
  body[data-rail-collapsed="true"] { --rail-now: 48px; }

  .side-rail {
    left: 0;
    top: var(--header-h);
    bottom: 0;
    width: var(--rail-w);
    max-width: none;
    border: 0;
    border-right: 1px solid var(--line);
    border-radius: 0;
    background: var(--stand);
    box-shadow: none;
    display: flex;
    flex-direction: column;
    transition: width var(--t) var(--ease);
  }

  .rail-toggle { padding: 16px 18px; }
  .rail-panel { display: block; flex: 1 1 auto; overflow-y: auto; padding: 4px 18px 22px; }

  body[data-rail-collapsed="true"] .side-rail { width: 48px; }
  body[data-rail-collapsed="true"] .rail-panel { display: none; }
  body[data-rail-collapsed="true"] .rail-toggle {
    flex-direction: column;
    align-items: center;
    gap: 14px;
    height: 100%;
    padding: 18px 0;
  }
  body[data-rail-collapsed="true"] .rail-toggle__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }
}

/* ---------- 22. 减少动效 ---------- */
@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;
  }
  html[data-reveal-ready="true"] [data-reveal] { opacity: 1; transform: none; }
  .btn:hover, .card:hover { transform: none; }
}