/* ============================================================
   乐动体育中国站 · 共享样式表 /assets/site.css
   夜场体育馆的数据指挥中心：深靛底 · 对位青 · 信号橙 · 沙金
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  margin: 0;
  padding-left: var(--rail-w);
  font-family: var(--f-body);
  font-size: 15px;
  line-height: 1.75;
  letter-spacing: .01em;
  color: var(--cream);
  background: var(--night);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--orange); }

ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 900;
  font-stretch: 85%;
  letter-spacing: -.02em;
  line-height: 1.14;
}

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

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

/* ---------- 2. 变量 ---------- */
:root {
  --night: #0A1730;
  --field: #12294A;
  --cream: #F2E7D5;
  --teal: #00E0C8;
  --orange: #FF6A2C;
  --gold: #E4B75C;
  --ink: #241531;
  --slate: #8AA0BF;
  --mist: #CDF5EF;
  --ember: #FFD7C0;

  --rail-w: 64px;
  --rail-open: 250px;
  --topbar-h: 58px;
  --gutter: 24px;
  --shell: 1240px;

  --ease: cubic-bezier(.22, .61, .36, 1);

  --f-display: "Source Han Sans SC Heavy", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --f-data: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;
  --f-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ---------- 3. 通用排版组件 ---------- */
.container {
  width: min(calc(100% - var(--gutter) * 2), var(--shell));
  margin-inline: auto;
}

.display {
  font-family: var(--f-display);
  font-weight: 900;
  font-stretch: 85%;
  letter-spacing: -.02em;
  line-height: 1.05;
  color: var(--cream);
}
.display--xl { font-size: clamp(38px, 7vw, 78px); }
.display--lg { font-size: clamp(30px, 4.6vw, 52px); }
.display--md { font-size: clamp(23px, 3vw, 34px); }

.lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.85;
  color: rgba(242, 231, 213, .82);
}

.data {
  font-family: var(--f-data);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: .02em;
}

.anno {
  font-family: var(--f-body);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--slate);
  line-height: 1.6;
}

.footnote {
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
}

.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;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 200;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--teal);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  transform: translate(-50%, -220%);
  transition: transform .24s var(--ease);
}
.skip-link:focus {
  transform: translate(-50%, 0);
  color: var(--ink);
}

/* ---------- 5. 头部外壳 ---------- */
.site-header {
  position: relative;
  z-index: 80;
}

/* 5.1 移动端顶部条（桌面端隐藏） */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 95;
  display: none;
  align-items: center;
  justify-content: space-between;
  height: var(--topbar-h);
  padding: 0 16px;
  background: rgba(10, 23, 48, .94);
  border-bottom: 1px solid rgba(138, 160, 191, .18);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.topbar-brand { display: flex; align-items: center; gap: 10px; }

.topbar-mark {
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 4px;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 15px;
}

.topbar-name {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: -.01em;
  color: var(--cream);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 14px;
  border: 1px solid rgba(0, 224, 200, .42);
  border-radius: 999px;
  color: var(--cream);
  font-size: 13px;
  letter-spacing: .08em;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.nav-toggle:hover {
  background: rgba(0, 224, 200, .12);
  border-color: var(--teal);
}
.nav-toggle[aria-expanded="true"] {
  background: rgba(0, 224, 200, .16);
  border-color: var(--teal);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px; height: 10px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px; height: 2px;
  background: currentColor;
  transition: transform .24s var(--ease);
}
.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-4px) rotate(-45deg); }

/* 5.2 侧边轨道 / 底部抽屉 */
.site-nav {
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  width: var(--rail-w);
  overflow: hidden;
  background: var(--night);
  border-right: 1px solid rgba(0, 224, 200, .16);
  transition: width .32s var(--ease);
}

.nav-progress {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 2px;
  background: rgba(138, 160, 191, .14);
  pointer-events: none;
}
.nav-progress-fill {
  display: block;
  width: 100%; height: 100%;
  background: linear-gradient(180deg, var(--teal), var(--orange));
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .12s linear;
}

/* 品牌 */
.nav-brand {
  position: relative;
  display: block;
  flex: 0 0 auto;
  height: 76px;
  border-bottom: 1px solid rgba(138, 160, 191, .18);
}
.nav-brand-mark {
  position: absolute;
  top: 16px; left: 10px;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 4px;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 21px;
  letter-spacing: -.04em;
  transition: background .24s var(--ease), color .24s var(--ease);
}
.nav-brand:hover .nav-brand-mark { background: var(--teal); }

.nav-brand-text {
  position: absolute;
  top: 50%; left: 66px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(-50%) translateX(-8px);
  transition: opacity .22s var(--ease) .08s, transform .26s var(--ease) .08s;
}
.nav-brand-full {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: -.01em;
  color: var(--cream);
}
.nav-brand-tag {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--slate);
}

/* 导航列表 */
.nav-list {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  padding: 12px 0;
}

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: block;
  height: 48px;
  color: var(--slate);
  transition: color .2s var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  top: 12px; bottom: 12px; left: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: transparent;
  transform: scaleY(.35);
  transform-origin: center;
  transition: transform .24s var(--ease), background .24s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--cream); }
.nav-link:hover::before { background: var(--teal); transform: scaleY(1); }

.nav-link[aria-current="page"] { color: var(--cream); }
.nav-link[aria-current="page"]::before { background: var(--orange); transform: scaleY(1); }
.nav-link[aria-current="page"] .nav-num { color: var(--orange); }

.nav-link[data-nav-active] .nav-num { color: var(--teal); }
.nav-link[data-nav-active] .nav-label { color: var(--teal); }

.nav-num {
  position: absolute;
  top: 0; left: 0;
  display: grid;
  place-items: center;
  width: var(--rail-w);
  height: 48px;
  font-family: var(--f-data);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .04em;
  transition: color .2s var(--ease);
}

.nav-label {
  position: absolute;
  top: 0; left: 66px;
  display: flex;
  align-items: center;
  height: 48px;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity .22s var(--ease) .06s, transform .26s var(--ease) .06s;
}

/* 轨道底部 */
.nav-foot {
  margin-top: auto;
  padding: 14px 0 20px;
  border-top: 1px solid rgba(138, 160, 191, .16);
}
.nav-cta {
  position: relative;
  display: block;
  height: 44px;
}
.nav-cta-mark {
  position: absolute;
  top: 4px; left: 14px;
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--orange);
  color: var(--ink);
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 15px;
  transition: transform .24s var(--ease);
}
.nav-cta:hover .nav-cta-mark { transform: scale(1.08); }
.nav-cta-text {
  position: absolute;
  top: 0; left: 66px;
  display: flex;
  align-items: center;
  height: 44px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cream);
  white-space: nowrap;
  opacity: 0;
  transition: opacity .22s var(--ease) .08s;
}

/* 遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 85;
  background: rgba(4, 10, 22, .74);
  opacity: 0;
  pointer-events: none;
  transition: opacity .28s var(--ease);
}
.nav-scrim[data-visible] { opacity: 1; pointer-events: auto; }

/* 返回顶部 */
.to-top {
  position: fixed;
  right: 20px; bottom: 20px;
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 17px;
  border: 1px solid rgba(0, 224, 200, .42);
  border-radius: 999px;
  background: var(--field);
  color: var(--cream);
  font-size: 13px;
  letter-spacing: .06em;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .26s var(--ease), transform .26s var(--ease), visibility .26s, border-color .2s var(--ease), background .2s var(--ease);
}
.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.to-top:hover {
  background: rgba(0, 224, 200, .14);
  border-color: var(--teal);
  color: var(--cream);
}
.to-top-arrow { font-family: var(--f-data); font-size: 14px; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 0;
  padding: 74px 0 34px;
  background: var(--ink);
  color: var(--cream);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--teal), var(--orange) 42%, var(--gold) 74%, var(--field));
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.3fr;
  gap: 48px 40px;
  width: min(calc(100% - var(--gutter) * 2), var(--shell));
  margin-inline: auto;
}

.footer-brand-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -.01em;
  color: var(--cream);
}
.footer-mark {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 4px;
  background: var(--cream);
  color: var(--ink);
  font-size: 16px;
}
.footer-desc {
  margin-top: 16px;
  max-width: 40ch;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 231, 213, .72);
}
.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  padding: 7px 13px;
  border: 1px solid rgba(0, 224, 200, .34);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--teal);
}
.footer-status::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 10px var(--teal);
}

.footer-col-title {
  margin-bottom: 16px;
  font-family: var(--f-data);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--slate);
}

.footer-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 18px;
}
.footer-nav a {
  font-size: 14px;
  color: rgba(242, 231, 213, .8);
  transition: color .2s var(--ease);
}
.footer-nav a:hover { color: var(--teal); }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
}
.footer-contact p {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  color: rgba(242, 231, 213, .9);
}
.footer-contact-label {
  font-family: var(--f-data);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--slate);
}
.footer-note {
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  width: min(calc(100% - var(--gutter) * 2), var(--shell));
  margin: 54px auto 0;
  padding-top: 22px;
  border-top: 1px solid rgba(138, 160, 191, .2);
  font-size: 12px;
  color: var(--slate);
}
.footer-copy { margin: 0; }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}
.footer-legal a { color: var(--slate); }
.footer-legal a:hover { color: var(--teal); }
.footer-icp {
  margin: 0;
  font-family: var(--f-data);
  letter-spacing: .02em;
}

/* ---------- 7. 通用 UI 组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--orange); color: var(--ink); }
.btn--primary:hover { background: #ff8352; color: var(--ink); }

.btn--teal { background: var(--teal); color: var(--ink); }
.btn--teal:hover { background: #4df0dd; color: var(--ink); }

.btn--ghost {
  border-color: rgba(0, 224, 200, .45);
  color: var(--cream);
}
.btn--ghost:hover {
  background: rgba(0, 224, 200, .12);
  border-color: var(--teal);
  color: var(--cream);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
}
.breadcrumb li { display: flex; align-items: center; gap: 10px; }
.breadcrumb li + li::before {
  content: "/";
  color: rgba(138, 160, 191, .55);
}
.breadcrumb a { color: var(--slate); }
.breadcrumb a:hover { color: var(--teal); }
.breadcrumb-current { color: var(--cream); }

.grid { display: grid; gap: 28px; }
.grid--7-3 { grid-template-columns: 7fr 3fr; }
.grid--6-6 { grid-template-columns: 1fr 1fr; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.section-band {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--teal);
}
.section-band--orange { background: var(--orange); }
.section-band--gold { background: var(--gold); }
.section-band--split { background: linear-gradient(90deg, var(--teal), var(--orange)); }

.panel {
  position: relative;
  padding: 26px;
  border-radius: 6px;
  background: var(--field);
}
.panel--cream {
  background: var(--cream);
  color: var(--ink);
}
.panel--cream h2,
.panel--cream h3,
.panel--cream .display { color: var(--ink); }
.panel--cream a { color: #0B6B63; }
.panel--cream a:hover { color: #B4451A; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid rgba(138, 160, 191, .4);
  border-radius: 999px;
  font-family: var(--f-data);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--slate);
}
.tag--teal {
  border-color: rgba(0, 224, 200, .5);
  background: rgba(0, 224, 200, .08);
  color: var(--teal);
}
.tag--gold {
  border-color: rgba(228, 183, 92, .5);
  background: rgba(228, 183, 92, .08);
  color: var(--gold);
}
.tag--orange {
  border-color: rgba(255, 106, 44, .5);
  background: rgba(255, 106, 44, .08);
  color: var(--orange);
}

.note-bar {
  padding: 14px 18px;
  border-left: 3px solid #0B6B63;
  border-radius: 4px;
  background: var(--mist);
  color: var(--ink);
  font-size: 13px;
  line-height: 1.75;
}
.note-bar a { color: #0B6B63; }
.note-bar--warn {
  border-left-color: var(--orange);
  background: var(--ember);
}

/* ---------- 8. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: 6px;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(0, 224, 200, .16), transparent 62%),
    linear-gradient(160deg, var(--field), #091428);
  aspect-ratio: 16 / 10;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(110% 80% at 50% 110%, rgba(255, 106, 44, .12), transparent 60%);
  pointer-events: none;
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 9. 动效协议 ---------- */
html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
html[data-js] [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

html[data-js] [data-oppose] {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
html[data-js] [data-oppose] > * {
  opacity: 0;
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}
html[data-js] [data-oppose] > *:first-child { transform: translateX(-24px); }
html[data-js] [data-oppose] > *:last-child { transform: translateX(24px); }
html[data-js] [data-oppose].is-in > * {
  opacity: 1;
  transform: none;
}

/* ---------- 10. 桌面 / 平板 ---------- */
@media (min-width: 900px) {
  .site-nav:hover,
  .site-nav:focus-within { width: var(--rail-open); }

  .site-nav:hover .nav-brand-text,
  .site-nav:focus-within .nav-brand-text { opacity: 1; transform: translateY(-50%) translateX(0); }

  .site-nav:hover .nav-label,
  .site-nav:focus-within .nav-label { opacity: 1; transform: translateX(0); }

  .site-nav:hover .nav-cta-text,
  .site-nav:focus-within .nav-cta-text { opacity: 1; }

  .nav-scrim { display: none; }
}

@media (max-width: 1180px) {
  .grid--7-3 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1.4fr 1fr; }
  .footer-col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 1023px) {
  .grid--3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 899px) {
  body { padding-left: 0; padding-top: var(--topbar-h); }
  .topbar { display: flex; }

  .site-nav {
    top: auto;
    left: 0; right: 0; bottom: 0;
    width: 100%;
    max-height: 86vh;
    overflow-y: auto;
    overscroll-behavior: contain;
    border-right: 0;
    border-top: 1px solid rgba(0, 224, 200, .24);
    border-radius: 20px 20px 0 0;
    background: var(--field);
    box-shadow: 0 -26px 64px rgba(0, 0, 0, .58);
    transform: translateY(101%);
    transition: transform .32s var(--ease);
  }
  .site-nav[data-open] { transform: translateY(0); }

  .nav-progress { display: none; }

  .nav-brand {
    display: flex;
    align-items: center;
    height: auto;
    padding: 18px 20px 14px;
    border-bottom: 1px solid rgba(138, 160, 191, .2);
  }
  .nav-brand-mark {
    position: static;
    flex: 0 0 auto;
    width: 40px; height: 40px;
    font-size: 19px;
  }
  .nav-brand-text {
    position: static;
    margin-left: 12px;
    opacity: 1;
    transform: none;
  }

  .nav-list { padding: 8px 0; }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    height: auto;
    padding: 13px 20px;
    color: var(--cream);
  }
  .nav-link::before { top: 9px; bottom: 9px; }
  .nav-num {
    position: static;
    width: auto;
    height: auto;
    font-size: 12px;
    color: var(--slate);
  }
  .nav-label {
    position: static;
    height: auto;
    font-size: 15px;
    opacity: 1;
    transform: none;
  }
  .nav-link[aria-current="page"] { background: rgba(0, 224, 200, .08); }
  .nav-link[aria-current="page"] .nav-label { color: var(--teal); font-weight: 700; }

  .nav-foot {
    padding: 14px 20px 22px;
  }
  .nav-cta {
    display: flex;
    align-items: center;
    gap: 12px;
    height: auto;
    padding: 13px 16px;
    border: 1px solid rgba(255, 106, 44, .45);
    border-radius: 12px;
    background: rgba(255, 106, 44, .12);
  }
  .nav-cta-mark {
    position: static;
    flex: 0 0 auto;
    width: 30px; height: 30px;
    font-size: 13px;
  }
  .nav-cta-text {
    position: static;
    height: auto;
    opacity: 1;
  }

  html[data-nav-open] body { overflow: hidden; }
}

@media (max-width: 767px) {
  :root { --gutter: 18px; }
  .grid--6-6,
  .grid--3 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-meta { margin-top: 42px; }
  .to-top { right: 14px; bottom: 14px; padding: 10px 14px; }
  .footer-nav { grid-template-columns: 1fr 1fr; }
}

/* ---------- 11. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }

  html[data-js] [data-reveal],
  html[data-js] [data-oppose] > * {
    opacity: 1;
    transform: none;
  }
}