/* ==========================================================================
   博鱼体育主站 · 共享样式 /assets/site.css
   深潜蓝夜色 + 鱼跃青数据线 + 珊瑚橙行动点 + 暖金比分
   ========================================================================== */

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

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

body { margin: 0; }

h1, h2, h3, h4, h5, p, figure, blockquote { margin: 0; }

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

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

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

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

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

/* ---------- 2. 设计变量 ---------- */
:root {
  --abyss: #04121F;
  --river: #0A2438;
  --river-deep: #071B2C;
  --teal: #14D6C4;
  --teal-bright: #62F2E2;
  --coral: #FF6B4A;
  --coral-glow: #FF9C7A;
  --gold: #F3C567;
  --glass: #EAF6F8;
  --mist: #8AA3B5;
  --scale: #C7D6E0;

  --line: rgba(199, 214, 224, .18);
  --line-strong: rgba(199, 214, 224, .40);
  --panel: rgba(10, 36, 56, .72);
  --panel-soft: rgba(8, 28, 45, .55);

  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-narrow: "Helvetica Neue", "Arial Narrow", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "Source Han Serif SC", serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --shell: 1240px;
  --gutter: clamp(18px, 4vw, 44px);
  --slant: clamp(24px, 4vw, 56px);
  --header-h: 78px;
  --shadow-hard: 4px 4px 0 rgba(0, 0, 0, .55);
  --shadow-lift: 6px 8px 0 rgba(0, 0, 0, .60);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--abyss);
  background-image:
    radial-gradient(120% 70% at 78% -12%, rgba(20, 214, 196, .10), transparent 62%),
    radial-gradient(90% 60% at 6% 2%, rgba(255, 107, 74, .07), transparent 60%);
  background-attachment: fixed;
  color: var(--glass);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: .01em;
  overflow-x: hidden;
}

main { display: block; }

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

::selection { background: rgba(20, 214, 196, .32); color: var(--glass); }

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

/* ---------- 4. 布局容器 ---------- */
.shell {
  width: min(100% - var(--gutter) * 2, var(--shell));
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 104px);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 24px);
}

.offset-card { margin-left: calc(-1 * clamp(0px, 3vw, 48px)); }

.editorial {
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.editorial__rail {
  display: grid;
  gap: 18px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.rail-note {
  border-left: 2px solid var(--teal);
  padding: 6px 0 6px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 5. 文字层级 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: .30em;
  color: var(--teal);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--teal);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: clamp(18px, 3vw, 48px);
  align-items: end;
  padding-bottom: 18px;
  margin-bottom: clamp(24px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
}

.section-head__title {
  font-family: var(--font-narrow);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.14;
  letter-spacing: .01em;
}

.section-head__note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.h-narrow { font-family: var(--font-narrow); font-weight: 700; line-height: 1.14; letter-spacing: .01em; }
.h-narrow--l { font-size: clamp(30px, 4.4vw, 44px); }
.h-narrow--m { font-size: clamp(24px, 3vw, 32px); }
.h-narrow--s { font-size: clamp(19px, 2.2vw, 24px); }

.h-serif {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.6;
}

.display-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.display-num--xl { font-size: clamp(46px, 6.6vw, 72px); }
.display-num--l { font-size: clamp(36px, 5vw, 56px); }
.display-num--m { font-size: clamp(28px, 4vw, 40px); }
.display-num--s { font-size: clamp(22px, 2.6vw, 28px); }

.caption {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

.prose { max-width: 72ch; }
.prose p { margin-bottom: 1.2em; }
.prose h2, .prose h3 { margin: 1.9em 0 .6em; }
.prose ul, .prose ol { list-style: disc; padding-left: 1.25em; margin-bottom: 1.2em; }
.prose li { margin-bottom: .5em; }
.prose a { color: var(--teal-bright); border-bottom: 1px solid var(--teal); }
.prose a:hover { color: var(--glass); }
.prose blockquote {
  border-left: 2px solid var(--coral);
  padding-left: 18px;
  color: var(--scale);
  font-family: var(--font-serif);
}

/* ---------- 6. 页头 ---------- */
.skip-link {
  position: absolute;
  top: 8px;
  left: 16px;
  z-index: 120;
  padding: 10px 18px;
  background: var(--teal);
  color: #03201E;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid #001410;
  transform: translateY(-180%);
  transition: transform .2s ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(4, 18, 31, .97), rgba(4, 18, 31, .84));
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
  transition: background .28s ease, box-shadow .28s ease;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 34px);
  padding-block: 16px;
  transition: padding .28s ease;
}

.site-header.is-condensed { box-shadow: 0 16px 34px -26px rgba(0, 0, 0, .95); }
.site-header.is-condensed .site-header__inner { padding-block: 8px; }
.site-header.is-condensed .brand__sub { opacity: 0; }

/* 品牌 */
.brand__link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--glass);
  background: linear-gradient(150deg, rgba(20, 214, 196, .26), rgba(255, 107, 74, .14));
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.brand__text { display: flex; flex-direction: column; line-height: 1.15; }

.brand__name {
  font-family: var(--font-narrow);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--glass);
}

.brand__sub {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--mist);
  transition: opacity .24s ease;
}

/* 栏目导航 */
.site-nav { margin-left: auto; }

.site-nav__list { display: flex; align-items: center; gap: clamp(10px, 1.6vw, 26px); }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--scale);
  transition: color .2s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 2px;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s ease;
}

.site-nav__link:hover { color: var(--glass); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--glass); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); background: var(--coral); }
.site-nav__link:focus-visible { background: rgba(20, 214, 196, .14); }

/* 快捷入口 + 鱼鳞银竖线 */
.quick-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: clamp(14px, 2vw, 28px);
  border-left: 1px solid transparent;
  border-image: repeating-linear-gradient(180deg, var(--scale) 0 6px, transparent 6px 11px) 1;
}

.quick-actions__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--scale);
  background: rgba(199, 214, 224, .05);
  border: 1px solid var(--line-strong);
  transition: transform .2s ease, border-color .2s ease, color .2s ease, background .2s ease;
}

.quick-actions__link:hover {
  color: var(--glass);
  border-color: var(--teal);
  transform: translateY(-2px);
}

.quick-actions__link--primary {
  color: #220702;
  font-weight: 700;
  background: linear-gradient(180deg, var(--coral), #E8552F);
  border-color: var(--coral);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, .5);
}

.quick-actions__link--primary:hover {
  color: #220702;
  background: linear-gradient(180deg, var(--coral-glow), var(--coral));
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  color: var(--glass);
  background: rgba(199, 214, 224, .05);
  border: 1px solid var(--line-strong);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, .5);
}

.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: var(--teal);
  transition: transform .24s ease, opacity .24s ease;
}

.nav-toggle__label { font-size: 13px; letter-spacing: .14em; }

.site-header[data-open] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(199, 214, 224, .12);
  overflow: hidden;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--teal-bright) 55%, var(--gold));
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 140px);
  background: linear-gradient(180deg, rgba(10, 36, 56, .38), rgba(4, 18, 31, 1) 62%);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.site-footer__inner {
  position: relative;
  z-index: 2;
  padding-block: clamp(44px, 6vw, 80px) clamp(80px, 10vw, 140px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.4fr 1fr;
  gap: clamp(24px, 3vw, 44px);
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-narrow);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--mist);
}

.footer-brand {
  font-family: var(--font-narrow);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .10em;
  color: var(--glass);
}

.footer-slogan {
  margin-top: 8px;
  font-family: var(--font-serif);
  font-size: 19px;
  color: var(--teal);
}

.footer-meta {
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.footer-links { display: grid; gap: 9px; }

.footer-links a {
  font-size: 15px;
  color: var(--scale);
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.footer-links a:hover {
  color: var(--teal-bright);
  border-bottom-color: var(--teal-bright);
}

.footer-links--contact li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--scale);
}

.footer-links__label {
  flex: 0 0 auto;
  min-width: 44px;
  padding-top: 2px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.footer-note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.footer-ridge {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: clamp(84px, 11vw, 150px);
  z-index: 1;
  pointer-events: none;
}

.footer-ridge__waves { width: 100%; height: 100%; }

.footer-ridge__tower {
  position: absolute;
  right: 7%;
  bottom: 0;
  width: clamp(88px, 11vw, 150px);
  height: auto;
  opacity: .85;
}

.footer-base {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(28px, 4vw, 48px);
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 8. 卡片 / 面板 / 标签 ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.2vw, 26px);
  background: linear-gradient(165deg, rgba(20, 214, 196, .07), rgba(10, 36, 56, .78) 55%), var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-hard);
  transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(20, 214, 196, .55);
  box-shadow: var(--shadow-lift);
}

.card--feature {
  grid-column: span 2;
  padding: clamp(22px, 3vw, 34px);
  background: linear-gradient(150deg, rgba(255, 107, 74, .13), rgba(10, 36, 56, .86) 48%), var(--panel);
}

.card--compact {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 56px;
  padding: 0 20px;
}

.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.card__title {
  font-family: var(--font-narrow);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--glass);
}

.card__body { font-size: 15px; line-height: 1.75; color: var(--scale); }

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--mist);
}

.panel {
  position: relative;
  background: var(--panel-soft);
  -webkit-backdrop-filter: blur(10px) saturate(130%);
  backdrop-filter: blur(10px) saturate(130%);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px clamp(16px, 2vw, 22px);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(20, 214, 196, .10), transparent 62%);
  font-size: 14px;
  letter-spacing: .10em;
  color: var(--scale);
}

.panel__body { padding: clamp(16px, 2vw, 24px); }

.panel__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--scale);
  background: rgba(199, 214, 224, .06);
  border: 1px solid var(--line-strong);
}

.tag--teal { color: var(--teal-bright); background: rgba(20, 214, 196, .10); border-color: rgba(20, 214, 196, .5); }
.tag--coral { color: #2A0B03; font-weight: 700; background: var(--coral-glow); border-color: var(--coral); }
.tag--gold { color: #2B1E00; font-weight: 700; background: var(--gold); border-color: var(--gold); }

.stat { padding: 16px; background: rgba(4, 18, 31, .6); }

.stat__value {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

/* ---------- 9. 按钮与筛选 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--glass);
  background: rgba(199, 214, 224, .05);
  border: 1px solid var(--line-strong);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, .5);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--teal);
  box-shadow: 4px 5px 0 rgba(0, 0, 0, .55);
}

.btn--primary {
  color: #220702;
  font-weight: 700;
  background: linear-gradient(180deg, var(--coral), #E8552F);
  border-color: var(--coral);
}

.btn--primary:hover { background: linear-gradient(180deg, var(--coral-glow), var(--coral)); }

.btn--ghost {
  color: var(--teal-bright);
  background: rgba(20, 214, 196, .06);
  border-color: rgba(20, 214, 196, .6);
}

.btn--quiet {
  color: var(--scale);
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.btn--quiet:hover { color: var(--teal-bright); box-shadow: none; }

.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--scale);
  background: rgba(10, 36, 56, .62);
  border: 1px solid var(--line-strong);
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.chip:hover { color: var(--glass); border-color: var(--teal); }

.chip[aria-pressed="true"] {
  color: var(--glass);
  font-weight: 600;
  border-color: var(--coral);
  background: rgba(255, 156, 122, .16);
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs { padding-block: 18px; }

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--mist);
}

.breadcrumbs__item { display: inline-flex; align-items: center; }

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(138, 163, 181, .6);
}

.breadcrumbs__item a { color: var(--scale); }
.breadcrumbs__item a:hover { color: var(--teal-bright); }
.breadcrumbs__item[aria-current="page"] { color: var(--glass); }

/* ---------- 11. 媒体容器与装饰 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: linear-gradient(160deg, rgba(20, 214, 196, .12), rgba(4, 18, 31, .94) 62%), var(--river);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--panorama { aspect-ratio: 21 / 9; }

.media-frame__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 64%;
}

.media-frame__overlay {
  position: absolute;
  inset: auto 0 0 0;
  padding: clamp(16px, 2.4vw, 28px);
  background: linear-gradient(180deg, rgba(4, 18, 31, 0), rgba(4, 18, 31, .94));
}

.scale-band {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image: radial-gradient(circle at 50% 100%, rgba(20, 214, 196, 0) 52%, rgba(20, 214, 196, .18) 54%, rgba(20, 214, 196, 0) 61%);
  background-size: 32px 32px;
}

.divider-slant {
  height: 3px;
  margin: clamp(32px, 5vw, 64px) 0;
  border: 0;
  background: linear-gradient(90deg, var(--teal) 0%, rgba(20, 214, 196, .14) 46%, var(--coral) 100%);
  transform: rotate(-.8deg);
  transform-origin: left center;
}

/* ---------- 12. 显现动效 ---------- */
.is-armed {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s ease, transform .55s ease;
}

.is-armed.is-in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: 1.2fr 1fr 1.2fr; }
  .footer-col:last-child { grid-column: span 3; }
}

@media (max-width: 960px) {
  .site-header__inner { flex-wrap: wrap; row-gap: 0; padding-block: 12px; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .site-header.is-condensed .site-header__inner { padding-block: 8px; }

  .site-nav,
  .quick-actions {
    flex-basis: 100%;
    width: 100%;
    max-height: 0;
    margin: 0;
    padding: 0;
    border: 0;
    border-image: none;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: max-height .32s ease, opacity .22s ease, padding .32s ease, margin .32s ease;
  }

  .site-nav { margin-left: 0; }

  .site-header[data-open] .site-nav,
  .site-header[data-open] .quick-actions {
    max-height: 70vh;
    opacity: 1;
    pointer-events: auto;
  }

  .site-header[data-open] .site-nav {
    margin-top: 12px;
    padding-block: 8px;
    border-top: 1px solid var(--line);
    overflow-y: auto;
  }

  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }

  .site-nav__link {
    display: block;
    padding: 13px 4px;
    font-size: 16px;
    border-bottom: 1px solid rgba(199, 214, 224, .10);
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    color: var(--coral-glow);
    border-bottom-color: rgba(255, 107, 74, .5);
  }

  .quick-actions { flex-direction: column; align-items: stretch; gap: 10px; }

  .site-header[data-open] .quick-actions { padding-block: 14px 6px; }

  .quick-actions__link { width: 100%; }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: span 6; }

  .editorial { grid-template-columns: 1fr; }
  .editorial__rail { position: static; }

  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section-head { grid-template-columns: 1fr; align-items: start; }
  .offset-card { margin-left: 0; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-col:last-child { grid-column: auto; }
  .footer-ridge__tower { right: 4%; opacity: .6; }
  .breadcrumbs__list { font-size: 12px; }
}

@media (max-width: 560px) {
  .card-grid { grid-template-columns: 1fr; }
  .card--feature { grid-column: span 1; }
  .brand__sub { display: none; }
  .footer-base { flex-direction: column; }
}

/* ---------- 14. 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;
  }

  .card:hover,
  .btn:hover,
  .quick-actions__link:hover { transform: none; }

  .is-armed { opacity: 1; transform: none; }
}