/* =========================================================
   必一看台 · 共享样式 /assets/site.css
   夜场看台 + 数据屏双语义：深墨绿基底 / 荧光青高亮 / 暖橙比分
   ========================================================= */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

button { background: none; border: 0; }

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

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

/* ---------- tokens ---------- */
:root {
  --ink: #0B2A22;
  --ink-2: #123D32;
  --ink-3: #0E3529;
  --mint: #1DE9B6;
  --mint-soft: #7CF5D5;
  --orange: #FF9F45;
  --snow: #F4F7F6;
  --mist: #D9E6E2;
  --charcoal: #07110F;
  --gray: #6B7F7A;
  --track: #4DA3FF;

  --bg: var(--ink);
  --surface: var(--ink-2);
  --text: var(--snow);
  --text-dim: #A7C0BA;
  --line: rgba(124, 245, 213, 0.16);
  --line-soft: rgba(124, 245, 213, 0.09);
  --line-strong: rgba(124, 245, 213, 0.34);

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --notch: 16px;
  --wrap: 1220px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --header-h: 7.6rem;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --lift: 0 18px 42px -26px rgba(7, 17, 15, 0.92);
}

/* ---------- base ---------- */
body {
  position: relative;
  min-height: 100vh;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.12rem);
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 夜场灯光：看台暗部 + 草皮反光 + 数据屏冷光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(115% 78% at 10% -12%, rgba(29, 233, 182, 0.17), transparent 56%),
    radial-gradient(88% 68% at 94% 2%, rgba(77, 163, 255, 0.13), transparent 60%),
    radial-gradient(72% 58% at 62% 112%, rgba(255, 159, 69, 0.1), transparent 64%);
}

.site-header,
main,
.site-footer { position: relative; z-index: 1; }

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--snow);
}

p { overflow-wrap: break-word; }

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

main [id] { scroll-margin-top: 8.5rem; }

/* ---------- 通用布局 ---------- */
.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(2.4rem, 6vw, 4.6rem); }
.section--tight { padding-block: clamp(1.5rem, 3.6vw, 2.4rem); }
.section--wide { padding-block: clamp(3.2rem, 8vw, 6.6rem); }

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.8rem);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--rail { grid-template-columns: minmax(0, 300px) minmax(0, 1fr); }
.grid--rail-rev { grid-template-columns: minmax(0, 1fr) minmax(0, 320px); }

/* ---------- 文字与数据原子 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--mint);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  flex: none;
  background: linear-gradient(90deg, var(--mint), transparent);
}

.section__title {
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.14;
}
.section__title em {
  font-style: normal;
  color: var(--mint);
}

.lede {
  max-width: 62ch;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-dim);
}

.note {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--gray);
}

.num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--mint-soft);
  background: rgba(29, 233, 182, 0.08);
  border: 1px solid rgba(29, 233, 182, 0.24);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 7px 100%, 0 calc(100% - 7px));
}

.stat { display: flex; flex-direction: column; gap: 0.25rem; }
.stat__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
}

/* 运动轨迹 / 斜线 / 虚线 */
.trail {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--mint), rgba(29, 233, 182, 0.06) 58%, rgba(255, 159, 69, 0.6));
}
.divider {
  height: 1px;
  border: 0;
  background-image: repeating-linear-gradient(90deg, rgba(124, 245, 213, 0.32) 0 6px, transparent 6px 14px);
}

/* ---------- 切角面板 ---------- */
.panel {
  --notch: 18px;
  position: relative;
  padding: clamp(1rem, 2.4vw, 1.65rem);
  color: var(--snow);
  background:
    linear-gradient(158deg, rgba(29, 233, 182, 0.1), rgba(11, 42, 34, 0) 46%),
    linear-gradient(180deg, var(--ink-2), var(--ink-3));
  clip-path: polygon(
    0 0,
    calc(100% - var(--notch)) 0,
    100% var(--notch),
    100% 100%,
    var(--notch) 100%,
    0 calc(100% - var(--notch))
  );
}
.panel::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--mint), rgba(29, 233, 182, 0) 74%);
  opacity: 0.85;
}
.panel--quiet::after { opacity: 0.35; }
.panel--warm::after { background: linear-gradient(90deg, var(--orange), rgba(255, 159, 69, 0) 74%); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.8rem 1.35rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--snow);
  background: transparent;
  border: 1px solid var(--line-strong);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn:hover {
  color: var(--charcoal);
  background-color: var(--mint);
  border-color: var(--mint);
  transform: translateY(-2px);
}
.btn--primary {
  color: var(--charcoal);
  background: linear-gradient(96deg, var(--mint), var(--mint-soft));
  border-color: transparent;
}
.btn--primary:hover {
  background: linear-gradient(96deg, var(--mint-soft), var(--orange));
  border-color: transparent;
}
.btn--outline { color: var(--mint); border-color: rgba(29, 233, 182, 0.45); }
.btn--outline:hover { color: var(--charcoal); background-color: var(--mint-soft); border-color: var(--mint-soft); }

/* ---------- 图片容器（页面阶段放图） ---------- */
.media {
  --notch: 16px;
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(92% 72% at 18% 0%, rgba(29, 233, 182, 0.24), transparent 62%),
    linear-gradient(160deg, #143F34, #0A241D 72%);
  clip-path: polygon(
    0 0,
    calc(100% - var(--notch)) 0,
    100% var(--notch),
    100% 100%,
    var(--notch) 100%,
    0 calc(100% - var(--notch))
  );
}
.media img,
.media video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.42;
  background-image:
    repeating-linear-gradient(90deg, rgba(124, 245, 213, 0.1) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(0deg, rgba(124, 245, 213, 0.07) 0 1px, transparent 1px 56px);
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }

.media__mark {
  position: absolute;
  left: 0.9rem;
  bottom: 0.8rem;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(124, 245, 213, 0.72);
}
.media__caption {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 1;
  padding: 1.6rem 0.95rem 0.75rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--mist);
  background: linear-gradient(180deg, transparent, rgba(7, 17, 15, 0.85));
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  color: var(--gray);
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--line-strong);
}
.breadcrumb a { color: var(--text-dim); transition: color 0.2s var(--ease); }
.breadcrumb a:hover { color: var(--mint); }

/* ---------- 显现动效 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  transition-delay: var(--reveal-delay, 0ms);
}

/* =========================================================
   头部 · 居中刊头导航
   ========================================================= */
.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 50%;
  z-index: 200;
  padding: 0.72rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--charcoal);
  background: var(--mint);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transform: translate(-50%, -180%);
  transition: transform 0.22s var(--ease);
}
.skip-link:focus {
  transform: translate(-50%, 0);
  outline: 2px solid var(--snow);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background:
    linear-gradient(180deg, rgba(7, 17, 15, 0.97), rgba(11, 42, 34, 0.92) 72%, rgba(11, 42, 34, 0.8));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  color: var(--text);
}

.site-header__inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 报头三栏 */
.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(0.6rem, 2vw, 1.6rem);
  padding: clamp(0.55rem, 1.3vw, 0.85rem) 0 clamp(0.4rem, 1vw, 0.6rem);
}

.masthead__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mint-soft);
  white-space: nowrap;
}

.pulse-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
  animation: pulse 2.6s var(--ease) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 159, 69, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(255, 159, 69, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 159, 69, 0); }
}

.brand {
  justify-self: center;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.12rem;
  padding: 0.1rem 0.35rem;
  text-align: center;
  transition: transform 0.24s var(--ease);
}
.brand:hover { transform: translateY(-1px); }

.brand__name {
  font-size: clamp(1.45rem, 3.1vw, 2.15rem);
  font-weight: 800;
  letter-spacing: 0.1em;
  line-height: 1.05;
  color: var(--snow);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .brand__name {
    background-image: linear-gradient(104deg, #F4F7F6 4%, #7CF5D5 42%, #1DE9B6 68%, #FF9F45 118%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--gray);
  transition: color 0.2s var(--ease);
}
.brand:hover .brand__tag { color: var(--mint-soft); }

.masthead__clock {
  justify-self: end;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.12rem;
  text-align: right;
}
.masthead__time {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}
.masthead__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gray);
}

/* 抽屉按钮：桌面隐藏 */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 1rem;
  padding: 0.72rem 0.1rem;
  color: var(--mint);
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  cursor: pointer;
}
.nav-toggle__label { pointer-events: none; }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 22px;
  flex: none;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.25s var(--ease), opacity 0.2s 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); }

/* 栏目行 */
.site-nav { border-top: 1px solid var(--line); }

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(0.35rem, 1.8vw, 1.7rem);
}

.site-nav__list a {
  position: relative;
  display: inline-block;
  padding: 0.62rem 0.2rem 0.72rem;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  color: var(--text-dim);
  transition: color 0.2s var(--ease);
}
.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.42rem;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--mint), var(--orange));
  transform: translateX(-50%);
  transition: width 0.28s var(--ease);
}
.site-nav__list a:hover { color: var(--snow); }
.site-nav__list a:hover::after { width: 100%; }
.site-nav__list a[aria-current="page"] { color: var(--mint); }
.site-nav__list a[aria-current="page"]::after {
  width: 100%;
  background: var(--mint);
}

/* 阅读进度线 */
.site-header__progress {
  height: 2px;
  background: rgba(124, 245, 213, 0.1);
}
.site-header__progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--mint) 0%, var(--mint-soft) 58%, var(--orange) 100%);
  transition: width 0.12s linear;
}

/* =========================================================
   页脚 · 深炭看台底
   ========================================================= */
.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--charcoal);
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.75;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--mint) 16%, var(--track) 46%, var(--orange) 78%, transparent);
  opacity: 0.55;
}
.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(77, 163, 255, 0.05) 0 1px, transparent 1px 26px);
}

.footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(2.2rem, 5vw, 3.4rem) var(--gutter) 1.2rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr) minmax(0, 0.95fr);
  gap: clamp(1.6rem, 4vw, 3rem);
}

.footer__brand {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.2;
  color: var(--snow);
}
.footer__tagline {
  margin-top: 0.6rem;
  max-width: 34ch;
  color: var(--text-dim);
}

.footer__facts {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.35rem 0.85rem;
  margin-top: 1.1rem;
  font-size: 0.92rem;
}
.footer__facts dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--gray);
  white-space: nowrap;
  padding-top: 0.22rem;
}
.footer__facts dd {
  margin: 0;
  color: var(--mist);
  word-break: break-word;
}

.footer__hours {
  margin-top: 0.9rem;
  font-size: 0.85rem;
  color: var(--gray);
  max-width: 40ch;
}

.footer__title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.9rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--mint-soft);
}
.footer__title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), transparent);
}

.footer__list {
  display: grid;
  gap: 0.42rem;
}
.footer__list a {
  position: relative;
  display: inline-block;
  padding-left: 0;
  color: var(--text-dim);
  transition: color 0.2s var(--ease), padding-left 0.24s var(--ease);
}
.footer__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 0;
  height: 1px;
  background: var(--mint);
  transition: width 0.24s var(--ease);
}
.footer__list a:hover { color: var(--mint); padding-left: 1.1rem; }
.footer__list a:hover::before { width: 0.75rem; }

.footer__note {
  margin-top: 1rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--gray);
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem 1.4rem;
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
}
.footer__legal {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--gray);
}
.footer__base-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
  font-size: 0.82rem;
}
.footer__base-links a { color: var(--text-dim); transition: color 0.2s var(--ease); }
.footer__base-links a:hover { color: var(--mint); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .grid--rail,
  .grid--rail-rev { grid-template-columns: minmax(0, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .masthead {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.4rem 0.9rem;
    padding-bottom: 0.6rem;
  }
  .masthead__kicker { display: none; }
  .brand { justify-self: start; align-items: flex-start; text-align: left; padding-left: 0; }
  .masthead__clock { justify-self: end; }

  .site-nav {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    border-top: 0;
    transition: max-height 0.34s var(--ease), visibility 0.34s;
  }
  .site-nav[data-open] {
    max-height: 78vh;
    overflow-y: auto;
    visibility: visible;
    padding-bottom: 0.9rem;
  }

  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav__list a {
    display: block;
    padding: 0.92rem 0.15rem;
    border-bottom: 1px dashed var(--line);
    font-size: 1rem;
    letter-spacing: 0.12em;
    color: var(--snow);
  }
  .site-nav__list a::after { display: none; }
  .site-nav__list a[aria-current="page"] { color: var(--mint); }
  .site-nav__list a[aria-current="page"]::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-right: 0.6rem;
    vertical-align: middle;
    background: var(--mint);
    transform: rotate(45deg);
  }

  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__base { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 620px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .panel { --notch: 14px; }
  .media { --notch: 12px; }
  .footer__facts { grid-template-columns: minmax(0, 1fr); gap: 0.1rem 0; }
  .footer__facts dt { padding-top: 0.45rem; }
}

/* =========================================================
   可达性与动效偏好
   ========================================================= */
@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;
  }
  .skip-link { transition: none; }
  html.js [data-reveal] { opacity: 1; transform: none; }
}