/* =========================================================
   88优德赛事 · 共享样式表 /assets/site.css
   深空底 + 堆叠面板 + 霓虹绿强调的夜间赛场体系
   ========================================================= */

/* ---------- 01 reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html:focus-within { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-weight: 800; line-height: 1.28; }
::selection { background: #35F0A0; color: #04120B; }

/* ---------- 02 变量 ---------- */
:root {
  --bg: #070B14;
  --panel: #0F1B33;
  --panel-hi: #1A2A4A;
  --neon: #35F0A0;
  --orange: #FF5A2B;
  --cyan: #4CD7FF;
  --gold: #FFC24B;
  --text: #EAF1FB;
  --muted: #94A3C0;
  --line: #22304F;
  --ink: #04120B;

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;

  --max: 1240px;
  --gutter: 24px;
  --gap: 24px;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;

  --ease: cubic-bezier(.22, .8, .24, 1);
}

/* ---------- 03 基础排版 ---------- */
body {
  position: relative;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(76, 215, 255, .075) 1px, transparent 1px);
  background-size: 26px 26px;
}
main, .site-header, .site-footer { position: relative; z-index: 1; }
#main-content { display: block; scroll-margin-top: 96px; }

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 6px;
}

.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;
}

.container {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
}
.page-shell { padding-top: 116px; }
.page-shell--flush { padding-top: 0; }

.h-display {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.06;
  letter-spacing: -.02em;
}
.h-section {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 800;
  letter-spacing: -.01em;
}
.h-card { font-size: 20px; font-weight: 700; letter-spacing: 0; }
.lead { font-size: 17px; line-height: 1.8; color: var(--muted); }
.note { font-size: 13px; line-height: 1.7; color: var(--muted); }
.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--neon);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  flex: 0 0 auto;
}

/* ---------- 04 布局 ---------- */
.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 52px); }
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 32px;
  margin-bottom: clamp(24px, 3vw, 36px);
}
.section-head__title { font-size: clamp(22px, 3vw, 28px); letter-spacing: -.01em; }
.section-head__desc { max-width: 46ch; font-size: 14.5px; color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.col-3 { grid-column: span 3; }
.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-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.divider { height: 1px; border: 0; margin: 0; background: var(--line); }

/* ---------- 05 显现节奏 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity .55s var(--ease),
    transform .55s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }
.stagger > * { --reveal-delay: 0ms; }
.stagger > :nth-child(2) { --reveal-delay: 60ms; }
.stagger > :nth-child(3) { --reveal-delay: 120ms; }
.stagger > :nth-child(4) { --reveal-delay: 180ms; }
.stagger > :nth-child(5) { --reveal-delay: 240ms; }
.stagger > :nth-child(6) { --reveal-delay: 300ms; }

/* ---------- 06 头部：透明叠加 → 实色阅读 ---------- */
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  background: var(--neon);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 11, 20, .86), rgba(7, 11, 20, 0));
  transition: opacity .3s var(--ease);
}
.site-header[data-scrolled="true"] {
  background: rgba(7, 11, 20, .94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.site-header[data-scrolled="true"]::before { opacity: 0; }

.header-inner {
  position: relative;
  z-index: 1;
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 76px;
  padding-block: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.brand__mark {
  position: relative;
  width: 36px; height: 36px;
  flex: 0 0 auto;
  border-radius: var(--radius-sm);
  background: conic-gradient(from 210deg, var(--neon), var(--cyan) 34%, var(--orange) 68%, var(--neon));
  box-shadow: 0 10px 26px -14px rgba(53, 240, 160, .95);
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 4px;
  background: var(--bg);
  transform: rotate(45deg);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: 19px;
  letter-spacing: .01em;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--muted);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(15, 27, 51, .82);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
}
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; flex: 0 0 auto; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
  transition: transform .25s var(--ease), opacity .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); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.site-nav__list { display: flex; align-items: center; gap: 2px; }
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-size: 14.5px;
  color: var(--muted);
  white-space: nowrap;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.site-nav__link:hover { color: var(--text); background: rgba(26, 42, 74, .72); }
.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: #3C4E76;
}
.site-nav__link[aria-current="page"] {
  color: var(--neon);
  background: rgba(53, 240, 160, .1);
}
.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--neon); }
.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
}
.site-nav__cta { margin-left: 14px; }

.header-status {
  display: none;
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  background: rgba(15, 27, 51, .82);
}
.header-status__inner {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}
.header-status__text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.header-status__dot {
  width: 7px; height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 90, 43, .16);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: .35; } }

.scroll-progress {
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 2px;
  z-index: 2;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--neon), var(--cyan) 58%, var(--orange));
}

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 98;
  background: rgba(4, 7, 13, .64);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s var(--ease), visibility .3s var(--ease);
}
.nav-scrim[data-open="true"] { opacity: 1; visibility: visible; }

/* ---------- 07 按钮与胶囊 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  transition: transform .18s var(--ease), box-shadow .22s var(--ease),
              background-color .22s var(--ease), color .22s var(--ease),
              border-color .22s var(--ease);
}
.btn--primary {
  background: var(--neon);
  color: var(--ink);
  box-shadow: 0 0 0 1px rgba(53, 240, 160, .35), 0 14px 34px -18px rgba(53, 240, 160, .95);
}
.btn--primary:hover { transform: translateY(-2px); }
.btn--ghost {
  border-color: var(--line);
  background: rgba(26, 42, 74, .38);
  color: var(--text);
}
.btn--ghost:hover { border-color: var(--neon); color: var(--neon); transform: translateY(-2px); }
.btn--accent {
  background: var(--orange);
  color: #1A0700;
  box-shadow: 0 14px 34px -20px rgba(255, 90, 43, .95);
}
.btn--accent:hover { transform: translateY(-2px); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: rgba(15, 27, 51, .72);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  transition: color .16s var(--ease), border-color .16s var(--ease),
              background-color .16s var(--ease);
}
.chip:hover { color: var(--text); border-color: var(--cyan); }
.chip--filter { cursor: pointer; font-family: var(--font-mono); letter-spacing: .06em; }
.chip--filter[aria-pressed="true"] {
  color: var(--neon);
  border-color: var(--neon);
  background: rgba(53, 240, 160, .14);
}

/* ---------- 08 面板与卡片 ---------- */
.panel {
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--panel), #0B1425);
}
.panel--flat { background: var(--panel); border-radius: var(--radius-md); }
.panel--accent {
  border-color: rgba(53, 240, 160, .42);
  box-shadow: 0 0 0 1px rgba(53, 240, 160, .1), 0 34px 74px -54px rgba(53, 240, 160, .95);
}
.panel--hover {
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.panel--hover:hover {
  transform: translateY(-4px);
  border-color: rgba(53, 240, 160, .55);
  box-shadow: 0 0 0 1px rgba(53, 240, 160, .22), 0 28px 54px -36px rgba(53, 240, 160, .75);
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}
.panel-head__title { font-size: 20px; font-weight: 700; }
.panel-head__id {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
  white-space: nowrap;
}

/* ---------- 09 数据与正文 ---------- */
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  font-style: normal;
  letter-spacing: -.02em;
  color: var(--neon);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.stat__value--orange { color: var(--orange); }
.stat__value--cyan { color: var(--cyan); }
.stat__value--gold { color: var(--gold); }
.stat__label { font-size: 13px; color: var(--muted); }

.prose { max-width: 42em; }
.prose p { font-size: 16px; color: #CFDBEE; }
.prose p + p { margin-top: 14px; }
.prose strong { color: #FFFFFF; font-weight: 700; }
.prose a { color: var(--neon); border-bottom: 1px solid rgba(53, 240, 160, .42); }
.prose ul { margin-top: 14px; display: grid; gap: 8px; }
.prose li { position: relative; padding-left: 20px; color: #CFDBEE; }
.prose li::before {
  content: "";
  position: absolute;
  left: 2px; top: .78em;
  width: 7px; height: 7px;
  border-radius: 2px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 10 面包屑与筛选 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}
.breadcrumb a { transition: color .16s var(--ease); }
.breadcrumb a:hover { color: var(--neon); }
.breadcrumb__sep { color: #3C4E76; }
.breadcrumb__item[aria-current="page"] { color: var(--text); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 4px 0 20px;
}
.filter-bar__hint {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
}
.filter-empty {
  display: none;
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}
.filter-empty[data-visible="true"] { display: block; }
[data-filter-item] { transition: opacity .16s var(--ease); }
[data-filter-item][data-filtered="out"] { opacity: 0; pointer-events: none; }

/* ---------- 11 图片占位容器 ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #0F1B33, #132444 58%, #0B1425);
  aspect-ratio: 16 / 10;
}
.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(76, 215, 255, .1) 1px, transparent 1px);
  background-size: 18px 18px;
}
.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame__caption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(7, 11, 20, .78);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--neon);
}

/* ---------- 12 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 96px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #070B14, #0A121F 42%, #0B1425);
  overflow: hidden;
}
.footer-beam {
  height: 3px;
  background: linear-gradient(90deg, var(--neon), var(--cyan) 42%, var(--orange) 76%, var(--gold));
}
.footer-inner {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
  padding: clamp(40px, 6vw, 68px) 0 clamp(32px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: clamp(32px, 5vw, 64px);
}
.footer-lead { display: flex; flex-direction: column; gap: 14px; max-width: 46ch; }
.footer-eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--cyan);
}
.footer-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: 26px;
  letter-spacing: -.01em;
}
.footer-intro { font-size: 14.5px; line-height: 1.85; color: var(--muted); }
.footer-cta { align-self: flex-start; margin-top: 4px; }

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px 24px;
}
.footer-col__title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--neon);
}
.footer-col__title::before {
  content: "";
  width: 7px; height: 7px;
  flex: 0 0 auto;
  border-radius: 2px;
  background: var(--orange);
  transform: rotate(45deg);
}
.footer-links { display: grid; gap: 10px; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 0;
  font-size: 14.5px;
  color: var(--muted);
  transition: color .18s var(--ease), gap .18s var(--ease);
}
.footer-links a::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--neon);
  transition: width .2s var(--ease);
}
.footer-links a:hover { color: var(--text); gap: 8px; }
.footer-links a:hover::before { width: 14px; }

.footer-bottom { border-top: 1px solid var(--line); }
.footer-bottom__inner {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
  padding: 22px 0 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}
.footer-contact { line-height: 1.9; }
.footer-legal { color: var(--muted); white-space: nowrap; }
.footer-legal span[data-year] { color: var(--text); }

/* ---------- 13 回到顶部 ---------- */
.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(15, 27, 51, .94);
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: 17px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s var(--ease),
              border-color .2s var(--ease);
}
.to-top[data-show="true"] { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--neon); }

/* ---------- 14 响应式 ---------- */
@media (min-width: 1081px) {
  .site-header[data-scrolled="true"] .header-status { display: block; }
}
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 99;
    width: min(88vw, 360px);
    height: 100dvh;
    margin: 0;
    padding: 92px 22px 32px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #0A121F;
    border-left: 1px solid var(--line);
    box-shadow: -34px 0 90px -48px rgba(0, 0, 0, .95);
    overflow-y: auto;
    transform: translateX(102%);
    transition: transform .32s var(--ease);
  }
  .site-nav[data-open="true"] { transform: none; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 6px; }
  .site-nav__link {
    padding: 14px 16px;
    border: 1px solid transparent;
    border-radius: 14px;
    font-size: 16px;
  }
  .site-nav__link[aria-current="page"] { border-color: rgba(53, 240, 160, .4); }
  .site-nav__link[aria-current="page"]::after { display: none; }
  .site-nav__cta { margin: 20px 0 0; }
}
@media (min-width: 1081px) {
  .nav-scrim { display: none; }
}
@media (max-width: 980px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-6 { grid-column: span 6; }
  .col-7, .col-8, .col-9 { grid-column: span 12; }
}
@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .container,
  .header-inner,
  .header-status__inner,
  .footer-inner,
  .footer-bottom__inner { width: min(100% - 32px, var(--max)); }
  .header-inner { min-height: 68px; gap: 12px; }
  .brand__sub { display: none; }
  .page-shell { padding-top: 100px; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-bottom__inner { flex-direction: column; align-items: flex-start; }
  .filter-bar__hint { margin-left: 0; width: 100%; }
}
@media (max-width: 640px) {
  .col-3, .col-4, .col-5, .col-6 { grid-column: span 12; }
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
  .btn { padding: 12px 18px; font-size: 14.5px; }
  .to-top { right: 16px; bottom: 16px; }
}

/* ---------- 15 无障碍与降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
  .site-nav { transition: none; }
  [data-filter-item] { transition: none; }
}