/* ============================================================
   米兰赛场 · /assets/site.css
   共享外壳：重置 / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

:root {
  --ink: #0B0B0D;
  --night: #151519;
  --paper: #F5F1E8;
  --mist: #A8A39B;
  --red: #D51F2B;
  --red-deep: #8C111B;
  --cyan: #18E0D0;
  --lime: #C7FF3D;
  --steel: #3A3A40;
  --amber: #FFB020;

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "Source Han Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --line: 1px solid var(--steel);
  --gutter: clamp(1rem, 2.6vw, 1.75rem);
  --radius: 0px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
main { display: block; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: var(--radius); }
::selection { background: var(--red); color: var(--paper); }
[id] { scroll-margin-top: 148px; }

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.075rem);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(120% 55% at 50% -12%, rgba(213, 31, 43, 0.22), transparent 62%),
    linear-gradient(180deg, #0B0B0D 0%, #0B0B0D 58%, #101014 100%);
  background-repeat: no-repeat;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
h1 { font-size: clamp(3.2rem, 9vw, 7.5rem); line-height: 0.92; }
h2 { font-size: clamp(2rem, 4.5vw, 4rem); }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.9rem); }
p { text-wrap: pretty; }
strong { color: var(--paper); font-weight: 700; }
code, kbd { font-family: var(--font-mono); font-size: 0.88em; color: var(--cyan); }

/* ---------- 工具类 ---------- */
.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: min(1240px, calc(100% - 2.5rem));
  margin-inline: auto;
}
.rule { border: 0; border-top: var(--line); margin-block: clamp(1.6rem, 4vw, 3rem); }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0.5rem; left: 0.5rem;
  z-index: 200;
  transform: translateY(-180%);
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.7rem 1rem;
  transition: transform 0.2s var(--ease);
}
.skip-link:focus, .skip-link:focus-visible { transform: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.72rem 1.1rem;
  border: 1px solid transparent;
  transition: background 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease), transform 0.18s var(--ease);
}
.btn--red { background: var(--red); color: var(--paper); }
.btn--red:hover { background: var(--red-deep); transform: translateY(-1px); }
.btn--ghost { border-color: var(--steel); color: var(--paper); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn--sm { padding: 0.55rem 0.85rem; font-size: 0.68rem; }
.btn--block { width: 100%; }

/* ---------- 徽标 / 索引标签 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--red); }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.24rem 0.5rem;
  border: 1px solid var(--steel);
  color: var(--mist);
}
.badge--lime { background: var(--lime); border-color: var(--lime); color: var(--ink); }
.badge--cyan { border-color: var(--cyan); color: var(--cyan); }
.badge--red { background: var(--red); border-color: var(--red); color: var(--paper); }

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(11, 11, 13, 0.94);
  border-bottom: var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: box-shadow 0.24s var(--ease);
}
.site-header.is-pinned { box-shadow: 0 14px 34px rgba(0, 0, 0, 0.55); }

.head-bar { position: relative; }
.head-bar__inner {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 1.4vw, 1.1rem);
  min-height: 70px;
  padding-block: 0.5rem;
  transition: min-height 0.22s var(--ease);
}
.site-header.is-pinned .head-bar__inner { min-height: 56px; }

/* 品牌 */
.brand { display: flex; align-items: center; gap: 0.65rem; flex: none; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  background: var(--red);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  clip-path: polygon(0 0, 100% 0, 100% 74%, 50% 100%, 0 74%);
  transition: background 0.18s var(--ease);
}
.brand:hover .brand__mark { background: var(--red-deep); }
.brand__text { display: flex; flex-direction: column; gap: 0.16rem; }
.brand__name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist);
}

/* V2.0 徽标 */
.version-badge {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--lime);
  padding: 0.3rem 0.55rem 0.24rem;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

/* 主导航 */
.primary-nav { margin-left: auto; }
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.3vw, 1.5rem);
}
.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.55rem 0;
  font-size: 0.95rem;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}
.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0.1rem;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease), background 0.22s var(--ease);
}
.primary-nav__num {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}
.primary-nav__link:hover { color: var(--cyan); }
.primary-nav__link:hover::after { transform: scaleX(1); }
.primary-nav__link:hover .primary-nav__num { color: var(--cyan); }
.primary-nav__link[aria-current="page"] { color: var(--paper); }
.primary-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  height: 3px;
  background: var(--red);
}
.primary-nav__link[aria-current="page"] .primary-nav__num { color: var(--red); }

.head-bar__actions { display: flex; align-items: center; gap: 0.6rem; flex: none; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.7rem;
  border: var(--line);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.nav-toggle:hover { color: var(--cyan); border-color: var(--cyan); }
.nav-toggle__bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle__label { line-height: 1; }
.nav-toggle[aria-expanded="true"] { color: var(--lime); border-color: var(--lime); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-5px) rotate(-45deg); }

/* 磁贴快捷入口带 */
.head-dock {
  background: var(--night);
  border-top: var(--line);
  border-bottom: var(--line);
}
.head-dock__inner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-block: 0.45rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.head-dock__inner::-webkit-scrollbar { display: none; }
.head-dock__tag {
  display: inline-flex;
  align-items: center;
  flex: none;
  align-self: center;
  padding-right: 0.7rem;
  margin-right: 0.2rem;
  border-right: var(--line);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
}
.dock-tile {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex: none;
  padding: 0.42rem 0.7rem;
  border: var(--line);
  background: var(--ink);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.dock-tile:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background: #101015;
}
.dock-tile__num {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: var(--red);
  transition: color 0.18s var(--ease);
}
.dock-tile:hover .dock-tile__num { color: var(--cyan); }
.dock-tile__label {
  font-size: 0.8rem;
  color: var(--mist);
  white-space: nowrap;
  transition: color 0.18s var(--ease);
}
.dock-tile:hover .dock-tile__label { color: var(--paper); }

/* 阅读进度 */
.progress {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: transparent;
  pointer-events: none;
  z-index: 2;
}
.progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--red), var(--lime));
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--night);
  border-top: 3px solid var(--red);
  overflow: hidden;
}
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3.4rem);
  padding-block: clamp(2.2rem, 6vw, 4rem);
}
.footer__wordmark {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.9rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--paper);
}
.footer__wordmark span { color: var(--red); }
.footer__line {
  margin-top: 0.9rem;
  font-size: 0.95rem;
  color: var(--paper);
  max-width: 32ch;
}
.footer__stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer__dot {
  width: 7px; height: 7px;
  background: var(--lime);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(199, 255, 61, 0.16);
}
.footer__note {
  margin-top: 1.1rem;
  max-width: 36ch;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--mist);
}
.footer__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gutter);
  align-content: start;
}
.footer__col { display: flex; flex-direction: column; }
.footer__title {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 0.9rem;
}
.footer__list { display: flex; flex-direction: column; }
.footer__link {
  display: inline-block;
  padding: 0.36rem 0;
  font-size: 0.94rem;
  color: var(--paper);
  transform-origin: left center;
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}
.footer__link:hover { color: var(--cyan); transform: translateX(3px); }
.footer__contact { min-width: 0; }
.contact-list { display: flex; flex-direction: column; }
.contact-list__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0;
  border-bottom: var(--line);
}
.contact-list__key {
  flex: none;
  min-width: 2.6rem;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}
.contact-list__val {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--paper);
  word-break: break-word;
}
.contact-list__item .copy-btn { margin-left: auto; }
.copy-btn {
  flex: none;
  padding: 0.24rem 0.44rem;
  border: var(--line);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.copy-btn:hover { background: var(--lime); border-color: var(--lime); color: var(--ink); }
.copy-btn[data-copied] { background: var(--cyan); border-color: var(--cyan); color: var(--ink); }

.footer__legal {
  border-top: var(--line);
  background: var(--ink);
}
.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1.2rem;
  padding-block: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.footer__icp { color: var(--mist); }
.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
  margin-left: auto;
}
.footer__legal-link {
  padding-bottom: 1px;
  border-bottom: 1px solid var(--steel);
  color: var(--mist);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer__legal-link:hover { color: var(--cyan); border-color: var(--cyan); }
.footer__year { color: var(--steel); }

/* ============================================================
   通用章节与基础组件
   ============================================================ */
.section {
  position: relative;
  padding-block: clamp(2.6rem, 7vw, 5.5rem);
}
.section--band {
  background: var(--night);
  border-block: var(--line);
}
.section__head {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  max-width: 62ch;
}
.section__title { color: var(--paper); }
.section__lead {
  max-width: 58ch;
  margin-top: 0.9rem;
  color: var(--mist);
}

.grid { display: grid; gap: var(--gutter); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  position: relative;
  padding: clamp(1.1rem, 2.4vw, 1.75rem);
  background: var(--night);
  border: var(--line);
}
.card--plate {
  border-left: 3px solid var(--red);
  background:
    linear-gradient(180deg, rgba(213, 31, 43, 0.1), transparent 62%),
    var(--night);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--steel);
}
.stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

/* 图片容器基础规则（页面阶段放入图片） */
.media {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  border: var(--line);
  isolation: isolate;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--tall { aspect-ratio: 3 / 4; }
.media img,
.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(160deg, rgba(213, 31, 43, 0.2), transparent 46%, rgba(24, 224, 208, 0.14));
  mix-blend-mode: screen;
}
.media__cap {
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

/* 正文容器 */
.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin-top: 1.9em; }
.prose h3 { font-size: 1.15rem; letter-spacing: 0; margin-top: 1.6em; }
.prose p { color: #E6E1D6; }
.prose ul, .prose ol { display: flex; flex-direction: column; gap: 0.5rem; }
.prose li { position: relative; padding-left: 1.2rem; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.78em;
  width: 6px; height: 2px;
  background: var(--red);
}
.prose a { color: var(--cyan); border-bottom: 1px solid rgba(24, 224, 208, 0.42); }
.prose a:hover { color: var(--lime); border-color: rgba(199, 255, 61, 0.6); }
.prose blockquote {
  border-left: 3px solid var(--red);
  padding-left: 1.1rem;
  color: var(--mist);
  font-size: 1.05rem;
}

/* 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding-block: 1rem 0;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
}
.breadcrumbs a { color: var(--mist); transition: color 0.18s var(--ease); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs__sep { color: var(--steel); }
.breadcrumbs [aria-current="page"] { color: var(--paper); }

/* 分段切换 */
.tabs { display: block; }
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-bottom: 0.6rem;
  border-bottom: var(--line);
}
.tabs__btn {
  padding: 0.5rem 0.85rem;
  border: var(--line);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease),
              background 0.18s var(--ease);
}
.tabs__btn:hover { color: var(--paper); border-color: var(--cyan); }
.tabs__btn[aria-selected="true"] {
  background: var(--red);
  border-color: var(--red);
  color: var(--paper);
}
.tabs__panel { padding-top: 1.4rem; }
.tabs__panel[hidden] { display: none; }

/* 对比表 */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.table caption {
  caption-side: bottom;
  padding-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  text-align: left;
}
.table th, .table td {
  padding: 0.7rem 0.8rem;
  border-bottom: var(--line);
  text-align: left;
  vertical-align: top;
}
.table thead th {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 0;
}
.table .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

/* 内链 CTA */
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid rgba(24, 224, 208, 0.45);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.link-more:hover { color: var(--lime); border-color: rgba(199, 255, 61, 0.6); }

/* 进入视口显现 */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.has-js [data-reveal].is-in { opacity: 1; transform: none; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  [id] { scroll-margin-top: 24px; }
  .site-header { position: static; }
  .head-bar__inner { flex-wrap: wrap; min-height: 64px; }
  .brand { margin-right: auto; }
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    display: none;
    order: 9;
    flex-basis: 100%;
    margin-left: 0;
    padding: 0.4rem 0 0.9rem;
    border-top: var(--line);
  }
  .primary-nav[data-open] { display: block; }
  .primary-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav__link {
    justify-content: flex-start;
    gap: 0.8rem;
    padding: 0.85rem 0.2rem;
    font-size: 1.02rem;
    border-bottom: var(--line);
  }
  .primary-nav__link::after { display: none; }
  .primary-nav__link[aria-current="page"] {
    color: var(--lime);
    padding-left: 0.9rem;
    box-shadow: inset 3px 0 0 var(--red);
  }
  .primary-nav__link[aria-current="page"] .primary-nav__num { color: var(--lime); }

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

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

@media (max-width: 640px) {
  .shell { width: calc(100% - 1.5rem); }
  .head-bar__inner { min-height: 58px; }
  .brand__sub { display: none; }
  .brand__name { font-size: 1.15rem; }
  .brand__mark { width: 32px; height: 32px; font-size: 1rem; }
  .version-badge { font-size: 0.56rem; padding: 0.24rem 0.42rem 0.2rem; }
  .head-bar__actions .btn { display: none; }
  .head-dock__tag { display: none; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__legal-links { margin-left: 0; }
  .footer__year { margin-left: auto; }
  .table { font-size: 0.82rem; }
  .table th, .table td { padding: 0.55rem 0.5rem; }
}

/* ============================================================
   动效降级
   ============================================================ */
@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-behavior: auto !important;
  }
  .has-js [data-reveal] { opacity: 1; transform: none; }
  .dock-tile:hover, .footer__link:hover, .btn--red:hover { transform: none; }
}