/* =========================================================
   AOA体育 — 共享站点样式 /assets/site.css
   框架式侧边导航 · 电子记分牌色彩体系 · 画册式文字建筑
   ========================================================= */

:root {
  /* 色彩 */
  --c-void: #06111F;
  --c-midnight: #0B2038;
  --c-cyan: #38F2E0;
  --c-cyan-soft: #8FF8EE;
  --c-signal: #FF5A2A;
  --c-ember: #FF8A3D;
  --c-ice: #F4FAFC;
  --c-steel: #8FA6B8;
  --c-glass: #0A20388C;
  --c-line: #38F2E047;
  --c-line-soft: rgba(56, 242, 224, 0.12);

  /* 字体 */
  --font-sans: "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺寸 */
  --rail-w: clamp(212px, 17vw, 264px);
  --topbar-h: 58px;
  --databar-h: 54px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 2px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-block-start: calc(var(--topbar-h) + 14px);
}

body {
  margin: 0;
  padding-block-start: calc(var(--topbar-h) + 2px);
  padding-block-end: calc(var(--databar-h) + 2px);
  background: var(--c-void);
  color: var(--c-ice);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.nav-open { overflow: hidden; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

p { margin: 0 0 1em; }
p:last-child { margin-block-end: 0; }
ul, ol { margin: 0; padding: 0; }
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
table { border-collapse: collapse; width: 100%; }
a { color: var(--c-cyan); }

:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

::selection {
  background: var(--c-cyan);
  color: var(--c-void);
}

/* ---------- 2. 通用排印 ---------- */
.wrap {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.u-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.u-eyebrow::before {
  content: "";
  inline-size: 18px;
  block-size: 1px;
  background: var(--c-cyan);
  flex: none;
}

.u-display {
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 6.5rem);
  font-weight: 200;
  line-height: 0.98;
  letter-spacing: -0.035em;
  color: var(--c-ice);
  text-wrap: balance;
}

.u-data {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  transform: skewX(-6deg);
}

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

.u-lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.8;
  color: var(--c-steel);
}

.stack > * + * { margin-block-start: var(--stack-gap, 18px); }

/* ---------- 3. 按钮 / 标签 / 面板 / 分隔线 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--c-ice);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

.btn:hover { border-color: var(--c-cyan); color: var(--c-cyan); }

.btn--primary {
  background: var(--c-signal);
  border-color: var(--c-signal);
  color: var(--c-void);
}

.btn--primary:hover {
  background: var(--c-ember);
  border-color: var(--c-ember);
  color: var(--c-void);
}

.btn--ghost {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.btn--ghost:hover {
  background: rgba(56, 242, 224, 0.12);
  color: var(--c-cyan-soft);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-cyan);
  background: rgba(56, 242, 224, 0.06);
}

.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-glass);
  -webkit-backdrop-filter: blur(18px) saturate(1.15);
  backdrop-filter: blur(18px) saturate(1.15);
}

.panel--solid {
  background: var(--c-midnight);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.rule {
  block-size: 1px;
  inline-size: 100%;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, rgba(56, 242, 224, 0.42), rgba(56, 242, 224, 0) 78%);
}

/* ---------- 4. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(14px, 2vw, 24px);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }

/* ---------- 5. 面包屑 ---------- */
.breadcrumb {
  margin-block-end: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-steel);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li + li::before {
  content: "/";
  margin-inline: 8px;
  color: rgba(56, 242, 224, 0.5);
}

.breadcrumb a {
  color: var(--c-steel);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb a:hover { color: var(--c-cyan); }
.breadcrumb [aria-current="page"] { color: var(--c-ice); }

/* ---------- 6. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(135deg, rgba(56, 242, 224, 0.07) 0 2px, transparent 2px 12px),
    linear-gradient(150deg, var(--c-midnight) 0%, var(--c-void) 82%);
}

.media > img,
.media > picture > img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  object-position: center;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media__caption {
  position: absolute;
  inset-block-end: 0;
  inset-inline: 0;
  margin: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-ice);
  background: linear-gradient(180deg, rgba(6, 17, 31, 0), rgba(6, 17, 31, 0.92));
}

/* ---------- 7. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  inset-block-start: 10px;
  inset-inline-start: 14px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--c-cyan);
  color: var(--c-void);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: var(--radius);
  transform: translateY(-220%);
  transition: transform 0.22s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--c-ice);
  outline-offset: 3px;
}

/* ---------- 8. 滚动进度 ---------- */
.scroll-meter {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  block-size: 3px;
  z-index: 120;
  background: rgba(56, 242, 224, 0.1);
  pointer-events: none;
}

.scroll-meter__bar {
  display: block;
  block-size: 100%;
  inline-size: 0;
  background: linear-gradient(90deg, var(--c-cyan) 0%, var(--c-ember) 64%, var(--c-signal) 100%);
  box-shadow: 0 0 12px rgba(56, 242, 224, 0.55);
}

/* ---------- 9. 头部 · 移动端形态（默认） ---------- */
.site-header {
  position: relative;
  z-index: 70;
}

.topbar {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  block-size: var(--topbar-h);
  padding-inline: 16px;
  background: rgba(6, 17, 31, 0.94);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-block-end: 1px solid var(--c-line);
}

.topbar__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--c-ice);
  text-decoration: none;
  transform: skewX(-6deg);
}

.topbar__brand-sub {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
  transform: skewX(6deg);
}

.topbar__right {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.topbar__ver {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
  padding: 2px 7px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.nav-toggle {
  display: grid;
  place-items: center;
  inline-size: 42px;
  block-size: 42px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: rgba(56, 242, 224, 0.06);
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.nav-toggle:hover { border-color: var(--c-cyan); background: rgba(56, 242, 224, 0.14); }

.nav-toggle__bars {
  position: relative;
  display: block;
  inline-size: 18px;
  block-size: 2px;
  background: var(--c-cyan);
  transition: background-color 0.2s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inline-size: 18px;
  block-size: 2px;
  background: var(--c-cyan);
  transition: transform 0.26s ease, top 0.26s ease;
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

.databar {
  position: fixed;
  inset-block-end: 0;
  inset-inline: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  gap: 14px;
  block-size: var(--databar-h);
  padding-inline: 16px;
  padding-block-end: env(safe-area-inset-bottom, 0px);
  background: rgba(11, 32, 56, 0.95);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-block-start: 1px solid var(--c-line);
  font-size: 12px;
}

.databar__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-inline-end: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-steel);
}

.databar__dot {
  inline-size: 6px;
  block-size: 6px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 8px var(--c-cyan);
  animation: aoa-pulse 2.4s ease-in-out infinite;
}

@keyframes aoa-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.databar__link {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-ice);
  text-decoration: none;
  padding-block: 4px;
  border-block-end: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.databar__link:hover { color: var(--c-cyan); border-block-end-color: var(--c-cyan); }

/* ---------- 10. 头部 · 抽屉导航（移动 / 平板） ---------- */
.rail {
  position: fixed;
  inset-block: var(--topbar-h) var(--databar-h);
  inset-inline-end: 0;
  z-index: 75;
  display: flex;
  flex-direction: column;
  gap: 20px;
  inline-size: min(88vw, 360px);
  padding: 22px 20px;
  overflow-y: auto;
  background: linear-gradient(168deg, #0B2038 0%, #06111F 74%);
  border-inline-start: 1px solid var(--c-line);
  box-shadow: -26px 0 64px rgba(0, 0, 0, 0.58);
  transform: translateX(104%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.34s cubic-bezier(0.22, 0.75, 0.28, 1), opacity 0.26s ease, visibility 0.34s;
}

.rail[data-open="true"] {
  transform: none;
  opacity: 1;
  visibility: visible;
}

.rail__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.rail__mark {
  display: inline-block;
  padding-block-end: 6px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 5.4vw, 30px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-ice);
  border-block-end: 2px solid var(--c-cyan);
  transform: skewX(-6deg);
}

.rail__brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-inline-size: 0;
}

.rail__brand-name {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--c-ice);
}

.rail__brand-tag {
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--c-steel);
}

.rail__nav { display: block; }

.rail__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  border-block-start: 1px solid var(--c-line);
}

.rail__item { margin: 0; }

.rail__link {
  position: relative;
  display: grid;
  grid-template-columns: 22px 1fr;
  align-items: baseline;
  gap: 8px;
  padding: 11px 8px 11px 14px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--c-steel);
  text-decoration: none;
  border-block-end: 1px solid rgba(56, 242, 224, 0.08);
  transition: color 0.22s ease, background-color 0.22s ease, padding-inline-start 0.22s ease;
}

.rail__link::before {
  content: "";
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: 0;
  inline-size: 2px;
  block-size: 0;
  border-radius: 2px;
  background: var(--c-cyan);
  box-shadow: 0 0 10px rgba(56, 242, 224, 0.85);
  transform: translateY(-50%);
  transition: block-size 0.24s ease;
}

.rail__link:hover {
  color: var(--c-ice);
  background: rgba(56, 242, 224, 0.06);
  padding-inline-start: 18px;
}

.rail__link:hover::before { block-size: 44%; }

.rail__link[aria-current="page"] {
  color: var(--c-cyan);
  background: linear-gradient(90deg, rgba(56, 242, 224, 0.14), rgba(56, 242, 224, 0) 74%);
}

.rail__link[aria-current="page"]::before { block-size: 74%; }

.rail__num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: rgba(143, 166, 184, 0.62);
}

.rail__link[aria-current="page"] .rail__num { color: var(--c-signal); }

.rail__label { min-inline-size: 0; }

.rail__meta {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-block-start: auto;
  padding-block-start: 16px;
  border-block-start: 1px solid var(--c-line);
}

.rail__meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-steel);
}

.rail__meta-key { color: rgba(143, 166, 184, 0.78); }

.rail__meta-val {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-cyan-soft);
}

.rail__chip {
  display: inline-block;
  padding: 1px 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-void);
  background: var(--c-cyan);
  border-radius: var(--radius);
  transform: skewX(-8deg);
}

.rail__meta-link {
  display: inline-block;
  margin-block-start: 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
  text-decoration: none;
  border-block-end: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.rail__meta-link:hover { color: var(--c-cyan-soft); border-block-end-color: var(--c-cyan-soft); }

/* ---------- 11. 头部 · 桌面端框架式侧边导航 ---------- */
@media (min-width: 1024px) {
  html { scroll-padding-block-start: 28px; }

  body {
    padding-block: 0;
    padding-inline-start: var(--rail-w);
  }

  .topbar,
  .databar { display: none; }

  .site-header {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    z-index: 60;
    display: flex;
    flex-direction: column;
    inline-size: var(--rail-w);
    overflow: hidden;
    background: linear-gradient(180deg, #0B2038 0%, #06111F 62%);
    border-inline-end: 1px solid var(--c-line);
  }

  .site-header::after {
    content: "";
    position: absolute;
    inset-block-start: 0;
    inset-inline-end: 0;
    inline-size: 2px;
    block-size: clamp(84px, 18vh, 190px);
    background: linear-gradient(180deg, var(--c-cyan), rgba(56, 242, 224, 0));
    pointer-events: none;
  }

  .site-header::before {
    content: "";
    position: absolute;
    inset-block-end: 0;
    inset-inline-start: 0;
    inline-size: 120px;
    block-size: 120px;
    background: radial-gradient(circle at 0% 100%, rgba(255, 90, 42, 0.18), transparent 70%);
    pointer-events: none;
  }

  .rail {
    position: static;
    inset: auto;
    z-index: auto;
    display: flex;
    flex-direction: column;
    gap: 26px;
    inline-size: auto;
    block-size: 100%;
    max-block-size: none;
    padding: 30px 22px 24px;
    overflow-y: auto;
    background: none;
    border-inline-start: 0;
    box-shadow: none;
    transform: none;
    opacity: 1;
    visibility: visible;
    transition: none;
  }

  .rail__mark { font-size: 32px; }
  .rail__brand-tag { max-inline-size: 15ch; }
  .rail__link { font-size: 14px; }
}

@media (min-width: 1440px) {
  .rail { padding: 36px 26px 28px; }
  .rail__mark { font-size: 36px; }
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-block-start: clamp(48px, 8vw, 96px);
  padding-block: clamp(40px, 6vw, 76px) 26px;
  background: linear-gradient(180deg, #0B2038 0%, #06111F 76%);
  border-block-start: 1px solid var(--c-line);
}

.footer__glow {
  position: absolute;
  inset-block-start: -170px;
  inset-inline-end: -90px;
  inline-size: min(560px, 90vw);
  block-size: 380px;
  background: radial-gradient(circle at 50% 50%, rgba(56, 242, 224, 0.2), rgba(56, 242, 224, 0) 68%);
  pointer-events: none;
}

.footer__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

.footer__brand { min-inline-size: 0; }

.footer__mark {
  margin: 0;
  font-size: clamp(2.3rem, 6vw, 4rem);
  font-weight: 200;
  line-height: 0.96;
  letter-spacing: -0.04em;
  color: var(--c-ice);
}

.footer__mark::after {
  content: "";
  display: block;
  inline-size: 68px;
  block-size: 4px;
  margin-block-start: 16px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-signal));
  transform: skewX(-24deg);
}

.footer__line {
  margin-block: 18px 16px;
  max-inline-size: 34ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-steel);
}

.footer__ver {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(143, 166, 184, 0.85);
}

.footer__chip {
  display: inline-block;
  padding: 1px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--c-void);
  background: var(--c-cyan);
  border-radius: var(--radius);
  transform: skewX(-8deg);
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 20px;
  min-inline-size: 0;
}

.footer__group { min-inline-size: 0; }

.footer__title {
  margin: 0 0 12px;
  padding-block-end: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-cyan);
  border-block-end: 1px solid rgba(56, 242, 224, 0.16);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__list a {
  display: inline-block;
  padding-block: 5px;
  font-size: 14px;
  color: var(--c-steel);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer__list a:hover { color: var(--c-ice); transform: translateX(3px); }
.footer__list a:focus-visible { color: var(--c-cyan); }

.footer__contact {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 12px 28px;
  margin-block-start: clamp(26px, 4vw, 46px);
  padding-block-start: 20px;
  border-block-start: 1px solid var(--c-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-steel);
}

.footer__contact-item { margin: 0; min-inline-size: 0; }

.footer__contact-key {
  display: block;
  margin-block-end: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(56, 242, 224, 0.78);
}

.footer__note {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(143, 166, 184, 0.82);
}

.footer__base {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  margin-block-start: 22px;
  padding-block-start: 16px;
  border-block-start: 1px solid rgba(56, 242, 224, 0.1);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(143, 166, 184, 0.8);
}

.footer__copy,
.footer__legal { margin: 0; }

@media (min-width: 560px) {
  .footer__nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 780px) {
  .footer__inner {
    grid-template-columns: minmax(240px, 1.05fr) minmax(0, 1.65fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .footer__nav { gap: 28px; }
  .footer__mark { font-size: clamp(3rem, 4.4vw, 4.4rem); }
}

/* ---------- 13. 滚动显现（需 .js 前缀，避免无脚本时内容隐藏） ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translate3d(0, 16px, 0);
  transition: opacity 0.42s ease, transform 0.42s cubic-bezier(0.2, 0.7, 0.3, 1);
  transition-delay: var(--reveal-delay, 0ms);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 减少动态 ---------- */
@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;
  }

  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .databar__dot { animation: none !important; }
  .rail { transition: none !important; }
  .scroll-meter__bar { box-shadow: none; }
}