/* ============================================================
   中欧体育 CN 站 · 共享外壳样式 /assets/site.css
   设计语言：赛前十分钟的战术板
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

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

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

img, svg, video, canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩 */
  --ink-900: #0B1F1A;
  --ink-800: #111312;
  --ink-700: #16362E;
  --ink-600: #1E463B;
  --signal: #00F0C8;
  --signal-soft: #A8FFE9;
  --warm: #FF8A3D;
  --silver: #C9D1CE;
  --paper: #F2F5F3;
  --muted: #7C8B86;
  --line: #2B2F2E;
  --line-soft: rgba(201, 209, 206, 0.16);
  --line-strong: rgba(201, 209, 206, 0.32);

  /* 字体 */
  --font-display: "Arial Narrow", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", "Courier New", monospace;

  /* 尺度 */
  --wrap: 1320px;
  --wrap-narrow: 1240px;
  --gutter: clamp(16px, 3vw, 40px);
  --radius: 3px;
  --header-h: 74px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1200px 600px at 88% -10%, rgba(0, 240, 200, 0.07), transparent 62%),
    radial-gradient(900px 520px at 4% 0%, rgba(255, 138, 61, 0.05), transparent 58%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: condensed;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
  text-wrap: balance;
}

h1 { font-size: clamp(34px, 5.4vw, 64px); }
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 28px); }
h4 { font-size: clamp(18px, 1.7vw, 22px); }

p { text-wrap: pretty; }

strong, b { font-weight: 700; color: var(--paper); }

small { font-size: 13px; color: var(--muted); }

::selection {
  background: var(--signal);
  color: #04120E;
}

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

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  transform: translateY(-180%);
  background: var(--signal);
  color: #04120E;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 10px 18px;
  border-radius: var(--radius);
  transition: transform 0.18s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-color: var(--paper);
}

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--ink-800);
  border-bottom: 1px solid var(--line-soft);
  color: var(--paper);
}

.site-header__progress {
  position: relative;
  display: block;
  height: 3px;
  width: 100%;
  background: rgba(201, 209, 206, 0.14);
  overflow: hidden;
}

.site-header__progress::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--signal) 0%, var(--signal-soft) 55%, var(--warm) 100%);
  transform: scaleX(var(--progress, 0));
  transform-origin: left center;
  transition: transform 0.12s linear;
}

.site-header__bar {
  width: min(var(--wrap), 100% - 2rem);
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(12px, 1.8vw, 28px);
  min-height: var(--header-h);
  padding-block: 10px;
}

/* 品牌 */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 2px;
  flex: 0 0 auto;
}

.site-brand__glyph {
  width: 13px;
  height: 26px;
  background: linear-gradient(155deg, var(--signal) 0%, var(--signal-soft) 45%, var(--warm) 100%);
  clip-path: polygon(0 0, 100% 16%, 100% 100%, 0 84%);
  flex: 0 0 auto;
}

.site-brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--paper);
  white-space: nowrap;
}

.site-brand__divider {
  width: 1px;
  height: 18px;
  background: var(--line-strong);
  transform: rotate(16deg);
}

.site-brand__region {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--signal);
}

/* 导航 */
.site-header__nav {
  display: flex;
  justify-content: center;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 0.9vw, 14px);
  flex-wrap: nowrap;
}

.site-nav__item { display: block; }

.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 6px;
  border-bottom: 2px solid transparent;
  color: var(--silver);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.site-nav__link:hover {
  color: var(--paper);
  border-bottom-color: rgba(0, 240, 200, 0.4);
}

.site-nav__link:hover .site-nav__index { color: var(--signal-soft); }

.site-nav__link[aria-current="page"] {
  color: var(--paper);
  border-bottom-color: var(--signal);
}

.site-nav__link[aria-current="page"] .site-nav__index { color: var(--signal); }

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 0.18s ease;
}

.site-nav__label { display: inline-block; }

.site-nav__cta {
  display: none;
  width: 100%;
  justify-content: center;
  margin-top: 18px;
}

/* 右侧工具区 */
.site-header__aside {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
}

.cmd-clock {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid rgba(0, 240, 200, 0.28);
  border-radius: var(--radius);
  background: rgba(0, 240, 200, 0.06);
  white-space: nowrap;
}

.cmd-clock__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--warm);
  box-shadow: 0 0 0 0 rgba(255, 138, 61, 0.55);
  animation: cmd-pulse 2.6s ease-in-out infinite;
  flex: 0 0 auto;
}

@keyframes cmd-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 138, 61, 0.5); opacity: 1; }
  50% { box-shadow: 0 0 0 5px rgba(255, 138, 61, 0); opacity: 0.7; }
}

.cmd-clock__label {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--silver);
}

.cmd-clock__value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.nav-toggle:hover { border-color: var(--signal); color: var(--signal); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
  flex: 0 0 auto;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.site-header[data-open="true"] .nav-toggle__bars::before {
  transform: translateY(4px) rotate(45deg);
}

.site-header[data-open="true"] .nav-toggle__bars::after {
  transform: translateY(-4px) rotate(-45deg);
}

.nav-toggle__text { display: inline-block; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: none;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  cursor: pointer;
  text-align: center;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.btn--signal {
  background: var(--signal);
  border-color: var(--signal);
  color: #04120E;
}

.btn--signal:hover {
  background: var(--signal-soft);
  border-color: var(--signal-soft);
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--warm);
  border-color: var(--warm);
  color: #190A02;
}

.btn--primary:hover {
  background: #FFA161;
  border-color: #FFA161;
  transform: translateY(-1px);
}

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--paper);
}

.btn--ghost:hover {
  border-color: var(--signal);
  color: var(--signal);
  transform: translateY(-1px);
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 100px);
  background: var(--ink-800);
  color: var(--silver);
  border-top: 1px solid var(--line-soft);
}

.site-footer__stripe {
  height: 6px;
  background: repeating-linear-gradient(
    115deg,
    rgba(0, 240, 200, 0.55) 0 10px,
    transparent 10px 26px
  );
  opacity: 0.55;
}

.site-footer__inner {
  width: min(var(--wrap), 100% - 2rem);
  margin-inline: auto;
  padding-block: clamp(28px, 4.5vw, 52px) 22px;
}

.site-footer__masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 28px;
  padding-bottom: clamp(18px, 2.5vw, 26px);
  border-bottom: 1px solid var(--line-soft);
}

.site-footer__wordmark {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  font-stretch: condensed;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.site-footer__tagline {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  padding-block: clamp(24px, 3.5vw, 40px);
}

.site-footer__col { min-width: 0; }

.site-footer__col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1.6;
  color: var(--signal);
  margin-bottom: 14px;
}

.site-footer__list {
  display: grid;
  gap: 10px;
}

.site-footer__link {
  font-size: 14px;
  line-height: 1.5;
  color: var(--silver);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.site-footer__link:hover,
.site-footer__link:focus-visible {
  color: var(--signal-soft);
  border-bottom-color: rgba(0, 240, 200, 0.5);
}

.site-footer__meta {
  display: grid;
  align-content: start;
  gap: 10px;
  min-width: 0;
}

.site-footer__meta-row {
  display: grid;
  gap: 2px;
}

.site-footer__meta-key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.site-footer__meta-value {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  color: var(--muted);
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 18px;
}

.site-footer__legal-link {
  color: var(--silver);
  border-bottom: 1px solid rgba(201, 209, 206, 0.24);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.site-footer__legal-link:hover,
.site-footer__legal-link:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.site-footer__copy {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(12px, 3vw, 28px);
  bottom: clamp(12px, 3vw, 28px);
  z-index: 150;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--ink-700);
  color: var(--paper);
  border: 1px solid rgba(0, 240, 200, 0.35);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease, border-color 0.18s ease, color 0.18s ease;
}

.to-top[data-visible="true"] {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.to-top:hover {
  border-color: var(--signal);
  color: var(--signal);
}

/* ---------- 8. 布局与通用容器 ---------- */
.container {
  width: min(var(--wrap-narrow), 100% - 2rem);
  margin-inline: auto;
}

.section {
  padding-block: clamp(40px, 7vw, 88px);
}

.section__head {
  display: grid;
  gap: 12px;
  max-width: 64ch;
  margin-bottom: clamp(20px, 3vw, 38px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--signal);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--warm);
  flex: 0 0 auto;
}

.grid {
  display: grid;
  gap: clamp(14px, 2vw, 26px);
}

.grid--12 {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.col { grid-column: span 12; min-width: 0; }
.col--3 { grid-column: span 3; }
.col--4 { grid-column: span 4; }
.col--5 { grid-column: span 5; }
.col--6 { grid-column: span 6; }
.col--7 { grid-column: span 7; }
.col--8 { grid-column: span 8; }
.col--9 { grid-column: span 9; }

/* ---------- 9. 正文与面包屑 ---------- */
.prose {
  max-width: 72ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--silver);
}

.prose > * + * { margin-top: 1em; }

.prose h2,
.prose h3,
.prose h4 {
  color: var(--paper);
  margin-top: 1.9em;
  margin-bottom: 0.45em;
}

.prose h2 { font-size: clamp(24px, 2.6vw, 32px); }
.prose h3 { font-size: clamp(19px, 2vw, 24px); }

.prose a {
  color: var(--signal-soft);
  border-bottom: 1px solid rgba(168, 255, 233, 0.45);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.prose a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.prose strong { color: var(--paper); }

.prose ul,
.prose ol {
  display: grid;
  gap: 8px;
  padding-left: 0;
}

.prose ul > li {
  position: relative;
  padding-left: 20px;
}

.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 1px;
  background: var(--warm);
}

.prose ol { counter-reset: prose-ol; }
.prose ol > li {
  position: relative;
  padding-left: 28px;
  counter-increment: prose-ol;
}

.prose ol > li::before {
  content: counter(prose-ol, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.35em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.prose blockquote {
  border-left: 2px solid var(--signal);
  padding: 4px 0 4px 18px;
  color: var(--paper);
  font-size: 18px;
}

.breadcrumb { margin-block: 18px 0; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
}

.breadcrumb__link {
  color: var(--silver);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--signal);
  border-bottom-color: rgba(0, 240, 200, 0.5);
}

.breadcrumb__sep {
  color: var(--line-strong);
  font-size: 10px;
}

/* ---------- 10. 卡片与标签 ---------- */
.card {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(16px, 2vw, 24px);
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: rgba(0, 240, 200, 0.4);
  background: var(--ink-600);
  transform: translateY(-2px);
}

.card__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--warm);
}

.card__title {
  font-family: var(--font-display);
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--paper);
}

.card__text {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--silver);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.plate {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  background: rgba(11, 31, 26, 0.6);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--silver);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.5;
}

.tag--live {
  background: rgba(255, 138, 61, 0.14);
  border-color: rgba(255, 138, 61, 0.42);
  color: var(--warm);
}

.tag--soon {
  background: rgba(0, 240, 200, 0.12);
  border-color: rgba(0, 240, 200, 0.36);
  color: var(--signal);
}

.tag--muted {
  background: rgba(201, 209, 206, 0.08);
  border-color: rgba(201, 209, 206, 0.22);
  color: var(--muted);
}

/* ---------- 11. 图片容器 ---------- */
.figure {
  display: grid;
  gap: 10px;
  margin: 0;
}

.figure__media,
.media-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background-color: var(--ink-700);
  background-image:
    linear-gradient(140deg, rgba(0, 240, 200, 0.1), transparent 58%),
    repeating-linear-gradient(135deg, rgba(201, 209, 206, 0.07) 0 2px, transparent 2px 16px);
}

.figure__media img,
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.figure--tall .figure__media { aspect-ratio: 4 / 5; }
.figure--wide .figure__media { aspect-ratio: 21 / 9; }

.figure__caption {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
  letter-spacing: 0.01em;
}

/* ---------- 12. 分隔与斜向引导线 ---------- */
.rule {
  height: 1px;
  border: 0;
  margin-block: clamp(20px, 4vw, 44px);
  background: var(--line-soft);
}

.rule--diagonal {
  position: relative;
  overflow: hidden;
  height: clamp(48px, 9vw, 116px);
  border: 0;
  margin-block: 0;
  background: none;
}

.rule--diagonal::before {
  content: "";
  position: absolute;
  left: -6%;
  top: 50%;
  width: 118%;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 240, 200, 0.85), rgba(0, 240, 200, 0.04) 78%);
  transform: rotate(-6deg) scaleX(0);
  transform-origin: left center;
  transition: transform 0.32s ease;
}

.rule--diagonal.is-visible::before {
  transform: rotate(-6deg) scaleX(1);
}

/* ---------- 13. 入场协议 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.34s ease, transform 0.34s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1100px) {
  .site-header__cta { display: none; }
  .site-nav__link { font-size: 13px; padding: 9px 4px; }
  .cmd-clock__label { display: none; }
}

@media (max-width: 980px) {
  :root { --header-h: 64px; }

  html { scroll-padding-top: 88px; }

  .site-header__bar {
    grid-template-columns: auto 1fr auto;
    gap: 10px;
  }

  .site-brand__name { font-size: 17px; }

  .nav-toggle { display: inline-flex; }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    justify-content: flex-start;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    padding: 0 var(--gutter);
    background: var(--ink-900);
    border-bottom: 1px solid rgba(0, 240, 200, 0.24);
    box-shadow: 0 18px 30px rgba(0, 0, 0, 0.45);
    transition: max-height 0.3s ease, visibility 0.3s ease, padding 0.3s ease;
  }

  .site-header[data-open="true"] .site-header__nav {
    max-height: calc(100vh - var(--header-h) - 4px);
    overflow-y: auto;
    visibility: visible;
    padding-block: 14px 26px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    display: flex;
    width: 100%;
    align-items: baseline;
    gap: 14px;
    padding: 15px 0;
    font-size: 17px;
    border-bottom: 1px solid rgba(201, 209, 206, 0.12);
  }

  .site-nav__index { font-size: 11px; }

  .site-nav__link[aria-current="page"] {
    border-bottom-color: rgba(0, 240, 200, 0.4);
  }

  .site-nav__cta { display: inline-flex; }

  .site-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col { grid-column: 1 / -1; }
  .col--3, .col--4 { grid-column: span 3; }
  .col--5, .col--6, .col--7, .col--8, .col--9 { grid-column: span 6; }

  .figure--wide .figure__media { aspect-ratio: 16 / 9; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .site-header__bar { padding-block: 8px; }

  .cmd-clock { padding: 5px 9px; }
  .cmd-clock__value { font-size: 12.5px; }

  .nav-toggle__text { display: none; }

  .site-footer__grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }

  .site-footer__bottom { align-items: flex-start; flex-direction: column; }

  .grid--12 { grid-template-columns: minmax(0, 1fr); }
  .col, .col--3, .col--4, .col--5, .col--6, .col--7, .col--8, .col--9 { grid-column: 1 / -1; }

  .figure--tall .figure__media { aspect-ratio: 3 / 4; }

  .to-top { padding: 9px 12px; font-size: 10px; }
}

/* ---------- 15. 降低动态效果 ---------- */
@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;
  }

  .reveal { opacity: 1; transform: none; }
  .rule--diagonal::before { transform: rotate(-6deg) scaleX(1); }
  .site-header__progress::after { transition: none; }
  .card:hover,
  .btn:hover { transform: none; }
}