/* ==========================================================================
   博万体育赛事 · /assets/site.css
   共享外壳：高原夜赛数据板 / 侧边轨道 + 印刷叠层
   ========================================================================== */

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

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

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

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

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

button { font: inherit; color: inherit; }

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

:where(h1, h2, h3, h4) { font-weight: 600; line-height: 1.3; }

/* ---------- 2. Tokens ---------- */
:root {
  --c-night: #070C14;
  --c-night-2: #0E1725;
  --c-steel: #1B2635;
  --c-lake: #1F86C4;
  --c-lake-light: #7FC4E8;
  --c-paper: #F2EFE7;
  --c-neon: #49E38F;
  --c-neon-soft: #B6F5D4;
  --c-amber: #F2762E;
  --c-amber-soft: #FFC69B;
  --c-muted: #93A3B5;
  --c-ink: #101822;

  --line-dark: rgba(127, 196, 232, .18);
  --line-strong: rgba(127, 196, 232, .34);
  --line-faint: rgba(127, 196, 232, .08);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
               "Noto Sans CJK SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas,
               "Liberation Mono", "Courier New", monospace;

  --rail-w: 88px;
  --bar-h: 60px;
  --page-max: 1320px;
  --gutter: clamp(18px, 3.2vw, 54px);

  --s1: 8px;
  --s2: 16px;
  --s3: 26px;
  --s4: 44px;
  --s5: 72px;
  --s6: 112px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .22s;
  --shadow-stack: 0 1px 0 rgba(255, 255, 255, .04),
                  0 22px 48px -32px rgba(0, 0, 0, .95);
}

/* ---------- 3. Base & 中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--c-night);
  background-image:
    radial-gradient(900px 520px at 86% -10%, rgba(31, 134, 196, .20), transparent 72%),
    radial-gradient(700px 460px at 2% 108%, rgba(73, 227, 143, .07), transparent 72%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--c-paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

#main-content { display: block; scroll-margin-top: calc(var(--bar-h) + 16px); }

::selection { background: var(--c-neon); color: var(--c-ink); }

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

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 400;
  padding: 10px 20px;
  background: var(--c-neon);
  color: var(--c-ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 头部：移动端品牌条 ---------- */
.site-header { position: relative; z-index: 200; }

.brandbar { display: none; }

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

.brandbar__mark {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  background: linear-gradient(140deg, var(--c-lake), #0E5C8C);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 0 0 1px rgba(127, 196, 232, .45);
}

.brandbar__text {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .16em;
}

.nav-toggle { display: none; }

/* ---------- 6. 头部：桌面侧边轨道 ---------- */
.rail {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 210;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s2);
  padding: 20px 0 16px;
  background: linear-gradient(180deg, #0B1424 0%, #0E1725 52%, #070C14 100%);
  border-right: 1px solid var(--line-dark);
  box-shadow: 24px 0 64px -48px rgba(0, 0, 0, .98);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
}

.rail-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-dark);
}

.rail-brand__mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: linear-gradient(140deg, var(--c-lake), #0E5C8C);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 0 0 1px rgba(127, 196, 232, .45),
              0 0 26px -8px rgba(73, 227, 143, .55);
}

.rail-brand__text {
  writing-mode: vertical-rl;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--c-paper);
}

.rail-brand__tag {
  max-width: 44px;
  writing-mode: horizontal-tb;
  font-size: 9.5px;
  line-height: 1.5;
  letter-spacing: .06em;
  text-align: center;
  color: var(--c-muted);
}

.rail-list {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  width: 100%;
  gap: 2px;
}

.rail-list__item { display: flex; }

.rail-link {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 9px 4px;
  color: var(--c-muted);
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.rail-link__idx {
  writing-mode: horizontal-tb;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 10px;
  letter-spacing: .1em;
  opacity: .6;
}

.rail-link__label {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: .14em;
}

.rail-link:hover {
  color: var(--c-paper);
  background: rgba(31, 134, 196, .12);
  border-left-color: rgba(127, 196, 232, .5);
}

.rail-link[aria-current="page"] {
  color: var(--c-paper);
  background: linear-gradient(90deg, rgba(31, 134, 196, .30), rgba(31, 134, 196, 0));
  border-left-color: var(--c-lake);
}

.rail-link[aria-current="page"] .rail-link__idx {
  color: var(--c-neon);
  opacity: 1;
}

.rail-tail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding-top: 14px;
  border-top: 1px solid var(--line-dark);
}

.rail-util {
  writing-mode: vertical-rl;
  padding: 6px 2px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-lake-light);
  transition: color var(--dur) var(--ease);
}

.rail-util:hover { color: var(--c-paper); }

.rail-cta {
  writing-mode: vertical-rl;
  padding: 16px 9px;
  background: var(--c-amber);
  border: 1px solid var(--c-amber-soft);
  border-radius: 2px;
  color: var(--c-ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  box-shadow: 0 0 0 1px rgba(242, 118, 46, .25),
              0 14px 32px -20px rgba(242, 118, 46, .95);
  transition: background-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.rail-cta:hover {
  background: var(--c-amber-soft);
  transform: translateY(-2px);
}

.nav-scrim { display: none; }

.rail-progress {
  position: fixed;
  top: 0;
  left: calc(var(--rail-w) - 2px);
  z-index: 215;
  width: 2px;
  height: 0;
  background: linear-gradient(180deg, var(--c-lake-light), var(--c-neon));
  box-shadow: 0 0 12px rgba(73, 227, 143, .65);
}

/* ---------- 7. 正文与页脚的轨道占位 ---------- */
@media (min-width: 900px) {
  #main-content { margin-left: var(--rail-w); }
  .site-footer { margin-left: var(--rail-w); }
}

@media (max-width: 899px) {
  #main-content { padding-top: var(--bar-h); }
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--s5);
  padding: var(--s5) var(--gutter) var(--s3);
  background: linear-gradient(180deg, var(--c-night) 0%, var(--c-night-2) 100%);
  border-top: 1px solid var(--line-strong);
  color: var(--c-paper);
}

.footer-frame {
  display: grid;
  grid-template-columns: minmax(200px, .9fr) minmax(260px, 1.3fr) minmax(240px, 1.1fr);
  gap: var(--s4);
  max-width: var(--page-max);
  margin: 0 auto;
  padding-top: var(--s3);
  padding-bottom: var(--s4);
  border-bottom: 1px solid var(--line-dark);
}

.footer-brand__link {
  display: inline-block;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .18em;
  color: var(--c-paper);
  transition: color var(--dur) var(--ease);
}

.footer-brand__link:hover { color: var(--c-lake-light); }

.footer-brand__tag {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--c-neon);
}

.footer-brand__legal {
  margin-top: var(--s3);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-muted);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s3);
}

.footer-nav__col {
  padding-left: var(--s3);
  border-left: 1px solid var(--line-dark);
}

.footer-nav__title {
  margin-bottom: 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .28em;
  color: var(--c-muted);
}

.footer-nav__list { display: grid; gap: 10px; }

.footer-nav__list a {
  display: inline-block;
  font-size: 13.5px;
  letter-spacing: .08em;
  color: rgba(242, 239, 231, .88);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-nav__list a:hover {
  color: var(--c-lake-light);
  border-bottom-color: var(--c-lake-light);
}

.footer-contact__line {
  font-size: 13.5px;
  letter-spacing: .04em;
  color: rgba(242, 239, 231, .88);
  word-break: break-word;
}

.footer-contact__line + .footer-contact__line { margin-top: 8px; }

.footer-contact__note {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.75;
  color: var(--c-muted);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  max-width: var(--page-max);
  margin: 0 auto;
  padding-top: var(--s2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-muted);
}

.footer-base__sign { color: var(--c-lake-light); }

/* ---------- 9. 通用：容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.grid { display: grid; gap: var(--s3); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- 10. 通用：排版 ---------- */
.display {
  font-size: clamp(46px, 8.5vw, 128px);
  font-weight: 200;
  line-height: .95;
  letter-spacing: -.02em;
}

.section-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.25;
}

.index-no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--c-neon);
}

.label {
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--c-muted);
}

.lede {
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.9;
  color: var(--c-lake-light);
}

.prose {
  max-width: 38em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(242, 239, 231, .86);
}

.prose p + p { margin-top: 1em; }

.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -.01em;
}

.divider {
  height: 1px;
  border: 0;
  margin: var(--s4) 0;
  background: linear-gradient(90deg, var(--line-strong), transparent);
}

/* ---------- 11. 通用：区块 ---------- */
.panel { padding: var(--s5) 0; }

.panel--steel { background: rgba(27, 38, 53, .55); }

.panel--paper {
  background: var(--c-paper);
  color: var(--c-ink);
}

.panel--paper .label,
.panel--paper .index-no { color: rgba(16, 24, 34, .6); }

.panel--paper .prose { color: rgba(16, 24, 34, .84); }

.panel--paper .divider { background: linear-gradient(90deg, rgba(16, 24, 34, .28), transparent); }

/* ---------- 12. 通用：卡片与叠层 ---------- */
.stack { position: relative; z-index: 0; }

.stack::before {
  content: "";
  position: absolute;
  top: 12px;
  right: -12px;
  bottom: -12px;
  left: 12px;
  z-index: -1;
  background: rgba(27, 38, 53, .6);
  border: 1px solid var(--line-dark);
}

.card {
  position: relative;
  padding: var(--s3);
  background: linear-gradient(180deg, rgba(27, 38, 53, .94), rgba(14, 23, 37, .94));
  border: 1px solid var(--line-dark);
  border-radius: 2px;
  box-shadow: var(--shadow-stack);
}

.card::after {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid var(--line-faint);
  pointer-events: none;
}

.card__head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
}

.card__title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .06em;
}

.card__body {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 239, 231, .84);
}

.card__meta {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-muted);
}

/* ---------- 13. 通用：按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 12px 22px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  color: var(--c-paper);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--amber {
  background: var(--c-amber);
  border-color: var(--c-amber-soft);
  color: var(--c-ink);
}

.btn--amber:hover { background: var(--c-amber-soft); }

.btn--neon {
  background: var(--c-neon);
  border-color: var(--c-neon);
  color: var(--c-ink);
}

.btn--neon:hover { background: var(--c-neon-soft); }

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--c-lake-light);
}

.btn--ghost:hover {
  color: var(--c-paper);
  border-color: var(--c-lake-light);
  background: rgba(31, 134, 196, .16);
}

.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: .45;
  cursor: not-allowed;
  transform: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(31, 134, 196, .10);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  color: var(--c-lake-light);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .14em;
}

.tag--data {
  color: var(--c-neon);
  border-color: rgba(73, 227, 143, .45);
  background: rgba(73, 227, 143, .10);
}

.tag--home {
  color: var(--c-amber);
  border-color: rgba(242, 118, 46, .5);
  background: rgba(242, 118, 46, .14);
}

.tag--away {
  color: var(--c-amber-soft);
  border-color: rgba(255, 198, 155, .38);
  background: rgba(255, 198, 155, .08);
}

.tag--neutral {
  color: var(--c-muted);
  border-color: var(--line-dark);
  background: rgba(147, 163, 181, .08);
}

/* ---------- 14. 通用：图片容器 ---------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--c-steel);
  border: 1px solid var(--line-dark);
  border-radius: 2px;
}

.figure img,
.figure video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.05);
}

.figure--wide { aspect-ratio: 16 / 9; }
.figure--tall { aspect-ratio: 3 / 4; }
.figure--band { aspect-ratio: 21 / 9; }

.figure__badge {
  position: absolute;
  left: 12px;
  bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: rgba(7, 12, 20, .68);
  border: 1px solid rgba(73, 227, 143, .42);
  color: var(--c-neon);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .14em;
}

.figure__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-muted);
}

/* ---------- 15. 通用：分段切换 ---------- */
.tabs { position: relative; }

.tabs__list {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: 1px solid var(--line-strong);
}

.tabs__tab {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
  padding: 13px 18px;
  background: transparent;
  border: 0;
  border-radius: 0;
  color: var(--c-muted);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .14em;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.tabs__tab:hover {
  color: var(--c-paper);
  background: rgba(31, 134, 196, .14);
}

.tabs__tab[aria-selected="true"] {
  color: var(--c-ink);
  background: var(--c-lake-light);
}

.tabs__indicator {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: var(--c-neon);
  box-shadow: 0 0 12px rgba(73, 227, 143, .7);
  transition: transform var(--dur) var(--ease), width var(--dur) var(--ease);
}

.tabs__panel { padding-top: var(--s3); }
.tabs__panel[hidden] { display: none; }

/* ---------- 16. 通用：面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: var(--s3) 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-muted);
}

.breadcrumb a {
  color: var(--c-lake-light);
  transition: color var(--dur) var(--ease);
}

.breadcrumb a:hover { color: var(--c-neon); }

.breadcrumb__sep { color: rgba(147, 163, 181, .5); }

.breadcrumb [aria-current="page"] { color: var(--c-paper); }

/* ---------- 17. 入场显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

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

/* ---------- 18. 移动端：抽屉导航 ---------- */
@media (max-width: 899px) {
  body.is-nav-open { overflow: hidden; }

  .brandbar {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 220;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--bar-h);
    padding: 0 14px;
    background: rgba(7, 12, 20, .94);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line-dark);
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    min-height: 42px;
    padding: 8px 12px;
    background: transparent;
    border: 1px solid var(--line-strong);
    border-radius: 2px;
    color: var(--c-paper);
    font-size: 12px;
    letter-spacing: .2em;
    cursor: pointer;
  }

  .nav-toggle__bars {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    width: 16px;
  }

  .nav-toggle__bars i {
    display: block;
    height: 1px;
    background: var(--c-lake-light);
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child {
    transform: translateY(2.5px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child {
    transform: translateY(-2.5px) rotate(-45deg);
  }

  .rail {
    right: auto;
    width: min(84vw, 330px);
    padding: calc(var(--bar-h) + 18px) 18px 28px;
    align-items: stretch;
    background: linear-gradient(180deg, #0B1424 0%, #0E1725 62%, #070C14 100%);
    border-right: 1px solid var(--line-strong);
    transform: translateX(-102%);
    transition: transform .28s var(--ease);
  }

  .rail[data-open] { transform: translateX(0); }

  .rail-brand { display: none; }

  .rail-list { flex: 0 0 auto; gap: 0; }

  .rail-link {
    flex-direction: row;
    align-items: center;
    gap: 14px;
    padding: 14px 10px;
    border-left: 2px solid transparent;
    border-bottom: 1px solid var(--line-faint);
  }

  .rail-link__idx { width: 22px; font-size: 11px; opacity: .7; }

  .rail-link__label {
    writing-mode: horizontal-tb;
    font-size: 15px;
    letter-spacing: .16em;
  }

  .rail-tail {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 22px;
  }

  .rail-util {
    writing-mode: horizontal-tb;
    padding: 8px 4px;
    font-size: 12px;
    letter-spacing: .16em;
  }

  .rail-cta {
    writing-mode: horizontal-tb;
    flex: 1 1 auto;
    padding: 14px 12px;
    text-align: center;
    letter-spacing: .14em;
  }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 205;
    background: rgba(4, 8, 14, .74);
    opacity: 0;
    pointer-events: none;
    transition: opacity .28s var(--ease);
  }

  .rail[data-open] ~ .nav-scrim {
    opacity: 1;
    pointer-events: auto;
  }

  .rail-progress { display: none; }

  .footer-frame { grid-template-columns: 1fr; gap: var(--s3); }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-nav__col { padding-left: 0; border-left: 0; padding-top: 14px; border-top: 1px solid var(--line-dark); }
  .site-footer { padding-top: var(--s4); margin-top: var(--s4); }
}

/* ---------- 19. 平板与手机补充 ---------- */
@media (max-width: 1023px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 719px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .figure--tall { aspect-ratio: 4 / 5; }
  .panel { padding: var(--s4) 0; }
}

@media (max-width: 479px) {
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
  .footer-base { justify-content: flex-start; letter-spacing: .12em; }
  .btn { width: 100%; justify-content: center; }
}

/* ---------- 20. 动效与减弱动效 ---------- */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  html { scroll-behavior: auto !important; }

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

  .btn:hover,
  .rail-cta:hover { transform: none; }
}