/* ==========================================================================
   安博体育的方式 · 共享外壳样式  /assets/site.css
   设计逻辑：夜场深蓝底 / 看台蓝分区 / 路径青贯穿 / 橙红只做赛前提醒
   层级：深蓝底（背景） → 玻璃中层（导航、悬浮标签） → 实色顶层（数据块）
   ========================================================================== */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, ul, ol, li, figure, dl, dt, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 变量 ---------- */
:root {
  --ab-night: #050B1E;
  --ab-stand: #0B1730;
  --ab-path: #22E0D6;
  --ab-path-soft: #7BF7EE;
  --ab-alert: #FF4D2E;
  --ab-amber: #FFB020;
  --ab-ink: #E8F1FF;
  --ab-mist: #93A6C8;
  --ab-steel: #2A3C63;
  --ab-glass: rgba(232, 241, 255, 0.08);
  --ab-glass-strong: rgba(232, 241, 255, 0.16);
  --ab-ink-deep: #0A0F1E;

  --ab-sans: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --ab-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --ab-rail-w: 96px;
  --ab-rail-open: 252px;
  --ab-rail-pad: 30px;
  --ab-topbar-h: 60px;
  --ab-radius: 2px;
  --ab-container: 1240px;
  --ab-shadow: 0 18px 48px rgba(2, 6, 18, 0.55);
  --ab-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 基础排版 ---------- */
body {
  font-family: var(--ab-sans);
  font-size: 16px;
  line-height: 1.72;
  color: var(--ab-ink);
  background-color: var(--ab-night);
  background-image:
    radial-gradient(1100px 620px at 78% -8%, rgba(34, 224, 214, 0.14), transparent 62%),
    radial-gradient(820px 500px at 2% 104%, rgba(255, 77, 46, 0.10), transparent 60%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  padding-top: var(--ab-topbar-h);
}
body.is-nav-open { overflow: hidden; }

h1, h2, h3, h4 { font-weight: 800; line-height: 1.14; letter-spacing: -0.01em; }
h1 { font-size: clamp(32px, 4vw, 56px); }
h2 { font-size: clamp(24px, 2.6vw, 36px); font-weight: 700; }
h3 { font-size: 20px; font-weight: 700; }
p { color: var(--ab-ink); }

.mono, .stat__num, .contact-line__value, .footer__base, .card__meta, .rail__stamp, .crumbs {
  font-family: var(--ab-mono);
  font-variant-numeric: tabular-nums;
}
.muted { color: var(--ab-mist); }
.annot {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.16em;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--ab-mist);
}
.annot--path { color: var(--ab-path); }
.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;
}

:focus-visible { outline: 2px solid var(--ab-path-soft); outline-offset: 2px; }

/* ---------- 版心与节奏 ---------- */
.container {
  width: 100%;
  max-width: var(--ab-container);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 48px);
}
.section { padding-block: clamp(56px, 8vw, 112px); }
.section--tight { padding-block: clamp(34px, 5vw, 64px); }
.section__head {
  display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between;
  gap: 20px; margin-bottom: clamp(20px, 3vw, 36px);
}
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--ab-path); font-weight: 500;
}
.kicker::before { content: ""; width: 26px; height: 2px; background: var(--ab-path); }
.lead { font-size: clamp(16px, 1.4vw, 19px); line-height: 1.7; color: var(--ab-mist); max-width: 62ch; }
.hairline { height: 1px; border: 0; background: linear-gradient(90deg, var(--ab-path), rgba(42, 60, 99, 0)); }
.page-head { padding-top: clamp(26px, 4vw, 56px); }
#main-content { display: block; }

/* 倾斜路径色带：首屏错位切割用 */
.diag {
  position: absolute; pointer-events: none; height: 2px;
  background: linear-gradient(90deg, var(--ab-path), rgba(34, 224, 214, 0));
  transform: rotate(-14deg); transform-origin: left center;
}
.diag--alert {
  height: 5px;
  background: linear-gradient(90deg, var(--ab-alert), rgba(255, 77, 46, 0));
}

/* ---------- 栅格（Bento 底座） ---------- */
.grid {
  display: grid; gap: clamp(14px, 1.6vw, 22px);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
[class*="span-"] { grid-column: span 2; }
@media (min-width: 640px) {
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-2 { grid-column: span 2; }
  .span-3 { grid-column: span 3; }
  .span-4 { grid-column: span 4; }
  .span-6 { grid-column: span 6; }
  .span-8 { grid-column: span 6; }
  .span-12 { grid-column: span 6; }
}
@media (min-width: 1024px) {
  .grid { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .span-3 { grid-column: span 3; }
  .span-4 { grid-column: span 4; }
  .span-6 { grid-column: span 6; }
  .span-8 { grid-column: span 8; }
  .span-12 { grid-column: span 12; }
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--ab-stand);
  border: 1px solid var(--ab-steel);
  border-radius: var(--ab-radius);
  padding: clamp(16px, 1.8vw, 24px);
  transition: transform 0.16s var(--ab-ease), border-color 0.16s var(--ab-ease), background-color 0.16s var(--ab-ease);
}
.card:hover { transform: translateY(-2px); border-color: var(--ab-path); }
.card--glass {
  background: var(--ab-glass);
  border-color: var(--ab-glass-strong);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.card--path {
  background: linear-gradient(135deg, rgba(34, 224, 214, 0.16), rgba(11, 23, 48, 0.92));
  border-color: rgba(34, 224, 214, 0.45);
}
.card--alert { background: var(--ab-alert); border-color: var(--ab-alert); color: var(--ab-ink-deep); }
.card--alert .card__title, .card--alert .card__meta, .card--alert p { color: var(--ab-ink-deep); }
.card__title { font-size: 20px; font-weight: 700; }
.card__meta { font-size: 13px; color: var(--ab-mist); }
.card__link::after { content: ""; position: absolute; inset: 0; }

/* ---------- 状态标签 ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border: 1px solid var(--ab-steel); border-radius: 999px;
  font-family: var(--ab-mono); font-size: 11px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ab-mist);
  font-variant-numeric: tabular-nums;
}
.chip--path { color: var(--ab-path); border-color: rgba(34, 224, 214, 0.5); background: rgba(34, 224, 214, 0.1); }
.chip--amber { color: var(--ab-ink-deep); background: var(--ab-amber); border-color: var(--ab-amber); font-weight: 700; }
.chip--alert { color: var(--ab-ink-deep); background: var(--ab-alert); border-color: var(--ab-alert); font-weight: 700; }

/* ---------- 数字 ---------- */
.stat { display: block; }
.stat__num {
  display: block; font-size: clamp(26px, 3vw, 40px);
  font-weight: 700; line-height: 1; color: var(--ab-ink);
}
.stat__num em { font-style: normal; font-size: 0.45em; color: var(--ab-path); margin-left: 6px; letter-spacing: 0.06em; }
.stat__label { display: block; margin-top: 8px; font-size: 12px; letter-spacing: 0.14em; color: var(--ab-mist); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border: 1px solid transparent; border-radius: var(--ab-radius);
  font-size: 14px; font-weight: 700; letter-spacing: 0.02em; text-align: center;
  transition: background-color 0.16s var(--ab-ease), border-color 0.16s var(--ab-ease),
              color 0.16s var(--ab-ease), transform 0.16s var(--ab-ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--path { background: var(--ab-path); color: var(--ab-ink-deep); }
.btn--path:hover { background: var(--ab-path-soft); }
.btn--alert { background: var(--ab-alert); color: var(--ab-ink-deep); }
.btn--alert:hover { background: #FF6A4D; }
.btn--outline { border-color: var(--ab-steel); background: rgba(232, 241, 255, 0.04); color: var(--ab-ink); }
.btn--outline:hover { border-color: var(--ab-path); color: var(--ab-path); }
.btn--sm { padding: 8px 14px; font-size: 13px; }
.btn--block { width: 100%; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }
.copy-btn { min-width: 78px; font-family: var(--ab-mono); letter-spacing: 0.04em; }
.copy-btn[data-copied] { border-color: var(--ab-path); color: var(--ab-path); }

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-size: 13px; color: var(--ab-mist);
}
.crumbs__link { border-bottom: 1px solid transparent; transition: color 0.16s var(--ab-ease), border-color 0.16s var(--ab-ease); }
.crumbs__link:hover { color: var(--ab-path); border-bottom-color: var(--ab-path); }
.crumbs__sep { color: var(--ab-steel); }
.crumbs__here { color: var(--ab-ink); }

/* ---------- 正文 ---------- */
.prose { max-width: 70ch; color: #D5E2F7; }
.prose p + p { margin-top: 14px; }
.prose h2 { margin-top: 36px; margin-bottom: 12px; }
.prose h3 { margin-top: 26px; margin-bottom: 8px; color: var(--ab-path); }
.prose ul { margin-top: 12px; display: grid; gap: 8px; }
.prose li { position: relative; padding-left: 18px; }
.prose li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 8px; height: 2px; background: var(--ab-path); }

/* ---------- 图片容器（页面阶段填图） ---------- */
.media {
  position: relative; overflow: hidden; border-radius: var(--ab-radius);
  aspect-ratio: 21 / 9;
  background: linear-gradient(135deg, var(--ab-stand), var(--ab-night));
}
.media > img, .media > picture > img { width: 100%; height: 100%; object-fit: cover; }
.media--3x2 { aspect-ratio: 3 / 2; }
.media--square { aspect-ratio: 1 / 1; }
.media__seam { position: absolute; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--ab-path), rgba(34, 224, 214, 0)); }
.media__seam--top { top: 0; }
.media__seam--bottom { bottom: 0; }
.media__caption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 10px 14px;
  font-family: var(--ab-mono); font-size: 12px; color: var(--ab-ink);
  background: linear-gradient(0deg, rgba(5, 11, 30, 0.9), rgba(5, 11, 30, 0));
}

/* ---------- 错峰显现 ---------- */
html[data-js] [data-reveal] {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.5s var(--ab-ease), transform 0.5s var(--ab-ease);
}
html[data-js] [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed; left: 16px; top: -70px; z-index: 200;
  padding: 10px 18px; border-radius: var(--ab-radius);
  background: var(--ab-path); color: var(--ab-ink-deep);
  font-size: 14px; font-weight: 700;
  transition: top 0.18s var(--ab-ease);
}
.skip-link:focus { top: 14px; }

/* ---------- 头部：顶部玻璃条（移动 / 平板） ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  height: var(--ab-topbar-h);
}
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  height: var(--ab-topbar-h); padding-inline: 16px;
  background: rgba(7, 16, 38, 0.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ab-steel);
  transition: background-color 0.2s var(--ab-ease);
}
.site-header[data-scrolled] .topbar { background: rgba(5, 11, 30, 0.96); }
.topbar__brand { display: inline-flex; align-items: center; gap: 10px; }
.topbar__mark {
  position: relative; width: 26px; height: 26px; flex: 0 0 26px; border-radius: var(--ab-radius);
  background: linear-gradient(140deg, var(--ab-path), #0D6A72);
}
.topbar__mark::before {
  content: ""; position: absolute; left: -4px; top: 50%; width: 34px; height: 2px;
  background: var(--ab-ink-deep); transform: rotate(-38deg);
}
.topbar__name { font-size: 15px; font-weight: 800; letter-spacing: 0.02em; }

.nav-toggle {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 9px 14px; border: 1px solid var(--ab-steel); border-radius: var(--ab-radius);
  background: var(--ab-glass); color: var(--ab-ink);
  font-size: 13px; font-weight: 700; letter-spacing: 0.06em;
  transition: border-color 0.16s var(--ab-ease), color 0.16s var(--ab-ease);
}
.nav-toggle:hover { border-color: var(--ab-path); color: var(--ab-path); }
.nav-toggle__bars { position: relative; display: block; width: 16px; height: 2px; background: currentColor; }
.nav-toggle__bars::before, .nav-toggle__bars::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 2px; background: currentColor;
  transition: transform 0.2s var(--ab-ease);
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 头部：侧边轨道（抽屉形态） ---------- */
.rail {
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 2;
  display: flex; flex-direction: column;
  width: min(330px, 86vw); padding: 22px 16px 20px;
  background: linear-gradient(180deg, #071026 0%, var(--ab-night) 62%, #07122A 100%);
  border-right: 1px solid var(--ab-steel);
  box-shadow: var(--ab-shadow);
  transform: translateX(-101%);
  transition: transform 0.28s var(--ab-ease);
  overflow-y: auto; overflow-x: hidden;
}
.site-header[data-open] .rail { transform: translateX(0); }
.scrim {
  position: fixed; inset: 0; z-index: 1; width: 100%; height: 100%;
  background: rgba(4, 9, 22, 0.68);
  backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
  opacity: 0; pointer-events: none;
  transition: opacity 0.24s var(--ab-ease);
}
.site-header[data-open] .scrim { opacity: 1; pointer-events: auto; }

.rail__close {
  position: absolute; top: 16px; right: 14px;
  display: grid; place-items: center; width: 34px; height: 34px;
  border: 1px solid var(--ab-steel); border-radius: var(--ab-radius);
  color: var(--ab-mist); font-size: 16px; line-height: 1;
  transition: border-color 0.16s var(--ab-ease), color 0.16s var(--ab-ease);
}
.rail__close:hover { border-color: var(--ab-path); color: var(--ab-path); }

/* 品牌签名 */
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand__mark {
  position: relative; width: 34px; height: 34px; flex: 0 0 34px;
  border-radius: var(--ab-radius); overflow: hidden;
  background: linear-gradient(140deg, var(--ab-path), #0D6A72);
}
.brand__mark::before {
  content: ""; position: absolute; left: -6px; top: 50%; width: 46px; height: 2px;
  background: var(--ab-ink-deep); transform: rotate(-38deg);
}
.brand__mark::after {
  content: ""; position: absolute; left: -6px; top: 50%; width: 46px; height: 2px;
  background: rgba(10, 15, 30, 0.5); transform: translateY(8px) rotate(-38deg);
}
.brand__text { display: flex; flex-direction: column; gap: 2px; overflow: hidden; }
.brand__name { font-size: 15px; font-weight: 800; letter-spacing: 0.03em; white-space: nowrap; }
.brand__sub {
  font-family: var(--ab-mono); font-size: 10px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--ab-path); white-space: nowrap;
}
.rail__brand { width: 100%; margin-bottom: 22px; padding: 4px 0; }

/* 路径导航点 */
.rail__list { position: relative; flex: 1 1 auto; display: flex; flex-direction: column; gap: 2px; padding-top: 4px; }
.rail__list::before {
  content: ""; position: absolute; left: 14px; top: 14px; bottom: 14px; width: 2px;
  background: linear-gradient(180deg, rgba(34, 224, 214, 0.6), rgba(42, 60, 99, 0.25));
}
.rail__item { display: block; }
.rail__link {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 12px; width: 100%;
  padding: 11px 8px; border-radius: var(--ab-radius);
  color: var(--ab-mist); font-size: 14px; font-weight: 500; letter-spacing: 0.02em;
  transition: color 0.16s var(--ab-ease), background-color 0.16s var(--ab-ease);
}
.rail__link:hover { color: var(--ab-ink); background: var(--ab-glass); }
.rail__link[aria-current="page"] { color: var(--ab-path); font-weight: 700; background: rgba(34, 224, 214, 0.08); }
.rail__node {
  width: 14px; height: 14px; flex: 0 0 14px; border-radius: 50%;
  border: 2px solid var(--ab-steel); background: var(--ab-night);
  transition: border-color 0.16s var(--ab-ease), background-color 0.16s var(--ab-ease), box-shadow 0.16s var(--ab-ease);
}
.rail__link:hover .rail__node { border-color: var(--ab-path); }
.rail__link[aria-current="page"] .rail__node {
  border-color: var(--ab-path); background: var(--ab-path);
  box-shadow: 0 0 0 4px rgba(34, 224, 214, 0.16);
}

/* 轨道底部动作 */
.rail__foot { display: flex; flex-direction: column; gap: 8px; margin-top: 20px; }
.rail__cta {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 10px; border: 1px solid var(--ab-steel); border-radius: var(--ab-radius);
  background: var(--ab-glass); color: var(--ab-ink);
  font-size: 13px; font-weight: 700; letter-spacing: 0.02em;
  transition: border-color 0.16s var(--ab-ease), color 0.16s var(--ab-ease),
              background-color 0.16s var(--ab-ease), transform 0.16s var(--ab-ease);
}
.rail__cta:hover { border-color: var(--ab-path); color: var(--ab-path); transform: translateY(-2px); }
.rail__cta--alert { background: var(--ab-alert); border-color: var(--ab-alert); color: var(--ab-ink-deep); }
.rail__cta--alert:hover { background: #FF6A4D; color: var(--ab-ink-deep); }
.rail__cta-dot {
  width: 0; height: 0; flex: 0 0 auto;
  border-left: 7px solid currentColor;
  border-top: 5px solid transparent; border-bottom: 5px solid transparent;
}
.rail__stamp {
  padding: 8px 10px 0; font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ab-mist); white-space: nowrap;
}

/* ---------- 桌面端：轨道常驻并展开 ---------- */
@media (min-width: 1024px) {
  body { padding-top: 0; padding-left: var(--ab-rail-w); }
  .topbar { display: none; }
  .site-header { top: 0; bottom: 0; right: auto; left: 0; width: var(--ab-rail-w); height: auto; }
  .rail {
    position: relative; top: auto; bottom: auto; transform: none;
    width: var(--ab-rail-w); height: 100%;
    padding: 26px var(--ab-rail-pad) 22px;
    box-shadow: none;
    transition: width 0.28s var(--ab-ease), padding 0.28s var(--ab-ease);
  }
  .site-header:hover .rail,
  .site-header:focus-within .rail { width: var(--ab-rail-open); padding-inline: 14px; }
  .scrim, .rail__close { display: none; }

  .rail__text, .brand__text {
    display: inline-block; overflow: hidden; white-space: nowrap;
    max-width: 0; opacity: 0;
    transition: max-width 0.28s var(--ab-ease), opacity 0.2s var(--ab-ease);
  }
  .site-header:hover .rail__text,
  .site-header:focus-within .rail__text,
  .site-header:hover .brand__text,
  .site-header:focus-within .brand__text { max-width: 190px; opacity: 1; }
  .brand__text { display: flex; max-width: 0; }
  .rail__cta { width: 100%; }
}

/* 路径线生长（仅在允许动效时） */
@media (prefers-reduced-motion: no-preference) {
  .rail__list::before {
    transform-origin: top center;
    animation: ab-path-grow 0.7s var(--ab-ease) both;
  }
}
@keyframes ab-path-grow { from { transform: scaleY(0); } to { transform: scaleY(1); } }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  padding-top: clamp(34px, 5vw, 64px);
  background: linear-gradient(180deg, var(--ab-night) 0%, var(--ab-stand) 58%, var(--ab-night) 100%);
  border-top: 1px solid var(--ab-steel);
  overflow: hidden;
}
.site-footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--ab-path), rgba(34, 224, 214, 0) 55%, var(--ab-alert));
}
.footer__belt {
  display: grid; gap: clamp(20px, 3vw, 40px); grid-template-columns: 1fr;
  padding-bottom: clamp(24px, 3vw, 40px);
  border-bottom: 1px solid var(--ab-steel);
}
.footer__lead {
  margin-top: 14px; font-size: clamp(18px, 1.8vw, 24px);
  font-weight: 700; line-height: 1.5; max-width: 34ch; color: var(--ab-ink);
}
.footer__lead em { font-style: normal; color: var(--ab-path); }
.footer__note { margin-top: 12px; font-size: 13px; line-height: 1.7; color: var(--ab-mist); max-width: 46ch; }
.footer__stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }

.footer__grid {
  display: grid; gap: clamp(24px, 3vw, 40px); grid-template-columns: 1fr;
  padding-block: clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--ab-steel);
}
@media (min-width: 720px) { .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) {
  .footer__belt { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); align-items: end; }
  .footer__grid { grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); }
}

.brand--footer { margin-bottom: 0; }
.footer__tagline { margin-top: 14px; font-size: 14px; line-height: 1.7; color: var(--ab-mist); max-width: 34ch; }
.footer__contact { display: grid; gap: 8px; margin-top: 18px; max-width: 430px; }
.contact-line {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; align-items: center;
  padding: 10px 12px; border: 1px solid var(--ab-steel); border-radius: var(--ab-radius);
  background: var(--ab-glass);
}
.contact-line__label {
  grid-column: 1 / -1; font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ab-mist);
}
.contact-line__value { font-size: 13px; color: var(--ab-ink); word-break: break-all; }
.contact-line--plain .contact-line__value { grid-column: 1 / -1; }

.footer__col-title {
  margin-bottom: 14px; font-size: 11px; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--ab-path);
}
.footer__list { display: grid; gap: 10px; }
.footer__list a {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--ab-mist);
  transition: color 0.16s var(--ab-ease);
}
.footer__list a::before {
  content: ""; width: 10px; height: 1px; background: var(--ab-steel);
  transition: width 0.16s var(--ab-ease), background-color 0.16s var(--ab-ease);
}
.footer__list a:hover { color: var(--ab-ink); }
.footer__list a:hover::before { width: 18px; background: var(--ab-path); }

.footer__base {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px; padding-block: 22px; font-size: 12px; color: var(--ab-mist);
}
.footer__copy { color: var(--ab-mist); }
.footer__icp { color: var(--ab-mist); letter-spacing: 0.04em; }

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  html[data-js] [data-reveal] { opacity: 1; transform: none; }
  .card:hover, .btn:hover, .rail__cta:hover { transform: none; }
}