/* ===================================================================
   多玩平台 · 共享站务样式  /assets/site.css
   夜航黑底 + 玻璃浮岛 + 实色内容层 + 橙/青绿/暖金三级强调
   =================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --ink-0: #070B12;
  --ink-1: #0E1624;
  --ink-2: #142235;
  --line: #25364D;
  --white: #F5F7FA;
  --silver: #B9C6D8;
  --orange: #FF7A1A;
  --teal: #18D6B0;
  --gold: #FFC857;
  --gold-deep: #B77A1E;
  --link: #5E8BFF;

  --glass: rgba(14, 22, 36, 0.74);
  --glass-strong: rgba(10, 17, 28, 0.94);
  --glass-line: rgba(37, 54, 77, 0.92);
  --island-shadow: 0 22px 46px -26px rgba(0, 0, 0, 0.95), inset 0 1px 0 rgba(245, 247, 250, 0.07);

  --radius-pill: 999px;
  --radius-card: 20px;
  --radius-lg: 28px;

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

  --page-max: 1480px;
  --gutter: clamp(18px, 4vw, 44px);
  --header-gap: clamp(100px, 13vh, 156px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: var(--link); text-decoration: none; }
main { display: block; }
[id] { scroll-margin-top: calc(var(--header-gap) - 24px); }

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--ink-0);
  color: var(--silver);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 42% at 8% -6%, rgba(255, 122, 26, 0.13), transparent 70%),
    radial-gradient(50% 40% at 96% 2%, rgba(24, 214, 176, 0.10), transparent 72%),
    radial-gradient(72% 52% at 50% 108%, rgba(94, 139, 255, 0.10), transparent 72%);
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--white);
}
p { max-width: 68ch; }
strong, b { font-weight: 700; color: var(--white); }
small { font-size: 12.5px; letter-spacing: 0.06em; }
code, kbd, samp, .mono { font-family: var(--font-mono); font-weight: 500; letter-spacing: 0.02em; }
::selection { background: rgba(255, 122, 26, 0.35); color: var(--white); }

/* ---------- 4. 焦点与跳转链接 ---------- */
:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 6px;
}
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  transform: translateY(-220%);
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  background: var(--teal);
  color: #04120E;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: transform 0.18s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 头部浮岛 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  padding: clamp(10px, 1.4vw, 18px) var(--gutter);
  pointer-events: none;
}
.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 95;
  background: rgba(37, 54, 77, 0.55);
}
.scroll-meter-fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--orange));
  transition: width 0.12s linear;
}
.header-inner {
  position: relative;
  max-width: var(--page-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 2vw, 28px);
  pointer-events: none;
}
.header-inner > * { pointer-events: auto; }

.brand-island {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px 10px 12px;
  border-radius: var(--radius-pill);
  background: var(--glass);
  border: 1px solid var(--glass-line);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  backdrop-filter: blur(18px) saturate(1.2);
  box-shadow: var(--island-shadow);
  color: var(--white);
  transition: padding 0.22s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.brand-island:hover { border-color: rgba(255, 122, 26, 0.55); }
.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  border-radius: 11px;
  background: linear-gradient(150deg, var(--orange), var(--gold-deep));
  box-shadow: inset 0 0 0 1px rgba(255, 200, 87, 0.4), 0 10px 22px -12px rgba(255, 122, 26, 0.9);
  transition: width 0.22s var(--ease), height 0.22s var(--ease), border-radius 0.22s var(--ease);
}
.brand-mark i {
  position: absolute;
  left: 10px;
  display: block;
  width: 12px;
  height: 3px;
  border-radius: 2px;
  background: var(--ink-0);
}
.brand-mark i:nth-child(1) { transform: translateY(-4px); }
.brand-mark i:nth-child(2) { transform: translateY(4px); opacity: 0.62; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name { font-size: 15.5px; font-weight: 800; letter-spacing: 0.04em; color: var(--white); }
.brand-tagline {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(185, 198, 216, 0.78);
  white-space: nowrap;
}

/* 导航胶囊 */
.nav-capsule {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 7px 9px 7px 18px;
  border-radius: var(--radius-pill);
  background: var(--glass);
  border: 1px solid var(--glass-line);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  backdrop-filter: blur(18px) saturate(1.2);
  box-shadow: var(--island-shadow);
  transition: padding 0.22s var(--ease), background 0.2s var(--ease);
}
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 13px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--silver);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.nav-link:hover { color: var(--white); background: rgba(37, 54, 77, 0.6); }
.nav-link[aria-current="page"] {
  color: var(--white);
  background: rgba(255, 122, 26, 0.15);
  box-shadow: inset 0 0 0 1px rgba(255, 122, 26, 0.45);
}
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--orange);
  transform: translateX(-50%);
}
.nav-quick {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 14px;
  border-left: 1px solid rgba(37, 54, 77, 0.9);
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 18px 10px 16px;
  border-radius: var(--radius-pill);
  background: var(--glass);
  border: 1px solid var(--glass-line);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  box-shadow: var(--island-shadow);
  color: var(--white);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
}
.nav-toggle-bars { display: grid; gap: 5px; width: 18px; }
.nav-toggle-bars i {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.site-header[data-open] .nav-toggle { border-color: rgba(255, 122, 26, 0.6); }
.site-header[data-open] .nav-toggle-bars i:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars i:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* 滚动收束态 */
.site-header[data-scrolled] .brand-island { padding: 7px 16px 7px 9px; }
.site-header[data-scrolled] .brand-tagline { display: none; }
.site-header[data-scrolled] .brand-mark { width: 28px; height: 28px; border-radius: 9px; }
.site-header[data-scrolled] .brand-mark i { left: 8px; }
.site-header[data-scrolled] .nav-capsule { padding: 5px 7px 5px 15px; background: var(--glass-strong); }
.site-header[data-scrolled] .nav-link { padding: 7px 12px; font-size: 13px; }
.site-header[data-scrolled] .btn { padding: 8px 15px; font-size: 12.5px; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  white-space: nowrap;
  text-decoration: none;
  transition: transform 0.18s var(--ease), background 0.18s var(--ease),
    box-shadow 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.btn-primary {
  background: linear-gradient(140deg, var(--orange), #FF9A45);
  color: #180A02;
  box-shadow: 0 14px 28px -16px rgba(255, 122, 26, 0.95);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 18px 34px -16px rgba(255, 122, 26, 1); }
.btn-teal {
  background: linear-gradient(140deg, var(--teal), #0FA98C);
  color: #04130F;
  box-shadow: 0 14px 28px -18px rgba(24, 214, 176, 0.95);
}
.btn-teal:hover { transform: translateY(-1px); }
.btn-gold {
  background: linear-gradient(140deg, var(--gold), var(--gold-deep));
  color: #1C1204;
  box-shadow: 0 14px 28px -18px rgba(255, 200, 87, 0.9);
}
.btn-gold:hover { transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  border-color: rgba(37, 54, 77, 1);
  color: var(--silver);
}
.btn-ghost:hover {
  color: var(--white);
  border-color: var(--teal);
  box-shadow: 0 0 0 1px rgba(24, 214, 176, 0.25);
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(72px, 10vw, 150px);
  overflow: hidden;
  border-top: 1px solid rgba(37, 54, 77, 0.75);
  background: linear-gradient(180deg, rgba(7, 11, 18, 0) 0%, var(--ink-1) 42%, #05080E 100%);
}
.footer-glow {
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: -46%;
  height: 420px;
  pointer-events: none;
  background:
    radial-gradient(58% 100% at 50% 100%, rgba(255, 122, 26, 0.17), transparent 72%),
    radial-gradient(40% 100% at 84% 100%, rgba(24, 214, 176, 0.1), transparent 72%);
}
.footer-inner {
  position: relative;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: clamp(44px, 6vw, 84px) var(--gutter) clamp(24px, 3vw, 34px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr repeat(3, minmax(0, 1fr)) 1.15fr;
  gap: clamp(26px, 3.2vw, 52px);
  align-items: start;
}
.footer-brand { max-width: 34ch; }
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--white);
}
.footer-wordmark { font-size: 20px; font-weight: 800; letter-spacing: 0.06em; }
.footer-slogan {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 12px;
}
.footer-note { font-size: 13.5px; line-height: 1.8; color: rgba(185, 198, 216, 0.8); max-width: 32ch; }

.footer-col-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: rgba(185, 198, 216, 0.62);
  margin-bottom: 16px;
}
.footer-links { display: grid; gap: 10px; }
.footer-link {
  display: inline-block;
  font-size: 14.5px;
  color: var(--silver);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}
.footer-link:hover { color: var(--teal); transform: translateX(2px); }

.footer-contact { display: grid; gap: 12px; align-content: start; }
.contact-row { display: grid; gap: 2px; }
.contact-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(185, 198, 216, 0.55);
  text-transform: uppercase;
}
.contact-value {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.01em;
  color: var(--white);
  overflow-wrap: anywhere;
}
.footer-ridge {
  height: 1px;
  margin: clamp(30px, 4vw, 48px) 0 20px;
  background: linear-gradient(90deg, transparent, rgba(37, 54, 77, 0.95), rgba(255, 122, 26, 0.4), transparent);
}
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(185, 198, 216, 0.66);
}
.footer-legal { color: rgba(185, 198, 216, 0.8); }
.footer-tip { max-width: 46ch; }

/* ---------- 8. 页面骨架与通用组件 ---------- */
.page-shell {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: var(--header-gap) var(--gutter) 0;
}
.layout-split {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: clamp(22px, 3vw, 46px);
  align-items: start;
}
.layout-triad {
  display: grid;
  grid-template-columns: minmax(200px, 280px) minmax(0, 1fr) minmax(0, 220px);
  gap: clamp(20px, 2.8vw, 40px);
  align-items: start;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(18px, 2.6vw, 34px);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(185, 198, 216, 0.68);
}
.breadcrumbs li { display: flex; align-items: center; gap: 10px; }
.breadcrumbs li + li::before { content: "/"; color: var(--line); }
.breadcrumbs a { color: rgba(185, 198, 216, 0.82); transition: color 0.18s var(--ease); }
.breadcrumbs a:hover { color: var(--teal); }
.breadcrumbs [aria-current="page"] { color: var(--white); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: linear-gradient(90deg, var(--teal), transparent);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 3vw, 40px);
  border-bottom: 1px solid rgba(37, 54, 77, 0.85);
}
.section-title { font-size: clamp(28px, 3.4vw, 46px); }
.section-lead { max-width: 54ch; font-size: 15.5px; line-height: 1.8; color: var(--silver); }

.annotation {
  writing-mode: vertical-rl;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.32em;
  color: rgba(185, 198, 216, 0.55);
  text-transform: uppercase;
  user-select: none;
}

.card {
  position: relative;
  padding: clamp(20px, 2.4vw, 30px);
  border-radius: var(--radius-card);
  border: 1px solid rgba(37, 54, 77, 0.92);
  background: linear-gradient(165deg, var(--ink-2), var(--ink-1));
  color: var(--silver);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.card:hover {
  transform: translateY(-2px);
  border-color: rgba(94, 139, 255, 0.5);
  box-shadow: 0 28px 52px -36px rgba(0, 0, 0, 0.98);
}

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(37, 54, 77, 0.95);
  background: rgba(20, 34, 53, 0.7);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--silver);
}
.tag--orange { color: var(--orange); border-color: rgba(255, 122, 26, 0.42); background: rgba(255, 122, 26, 0.1); }
.tag--teal { color: var(--teal); border-color: rgba(24, 214, 176, 0.42); background: rgba(24, 214, 176, 0.1); }
.tag--gold { color: var(--gold); border-color: rgba(255, 200, 87, 0.45); background: rgba(255, 200, 87, 0.1); }

.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(37, 54, 77, 0.92);
  background:
    radial-gradient(120% 100% at 18% 0%, rgba(255, 122, 26, 0.2), transparent 62%),
    radial-gradient(110% 100% at 90% 100%, rgba(24, 214, 176, 0.16), transparent 62%),
    var(--ink-2);
}
.media-frame img,
.media-frame picture,
.media-frame video { width: 100%; height: 100%; object-fit: cover; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame-caption {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: rgba(185, 198, 216, 0.62);
}

.rail { position: relative; }
.rail-track {
  display: flex;
  gap: clamp(14px, 2vw, 22px);
  overflow-x: auto;
  padding: 6px 4px 18px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.rail-track::-webkit-scrollbar { height: 6px; }
.rail-track::-webkit-scrollbar-thumb { background: var(--line); border-radius: 99px; }
.rail-item { flex: 0 0 clamp(238px, 26vw, 320px); scroll-snap-align: start; }
.rail-nav { display: flex; gap: 8px; }
.rail-btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(20, 34, 53, 0.66);
  color: var(--silver);
  font-size: 15px;
  line-height: 1;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.rail-btn:hover { color: var(--white); border-color: var(--teal); background: rgba(24, 214, 176, 0.14); }

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(37, 54, 77, 0.95), transparent);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 9. 平板 ---------- */
@media (max-width: 1240px) {
  .footer-grid { grid-template-columns: 1.2fr repeat(3, minmax(0, 1fr)); }
  .footer-contact { grid-column: 1 / -1; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px 26px; }
  .layout-triad { grid-template-columns: minmax(200px, 260px) minmax(0, 1fr); }
  .layout-triad > .annotation { display: none; }
}

@media (max-width: 1080px) {
  .site-header { padding: 10px var(--gutter); }
  .nav-toggle { display: inline-flex; }
  .nav-capsule {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 16px;
    border-radius: 24px;
    background: var(--glass-strong);
    border-color: rgba(37, 54, 77, 0.95);
    box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s linear;
  }
  .site-header[data-open] .nav-capsule {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-link { padding: 13px 14px; border-radius: 14px; font-size: 15px; }
  .nav-link[aria-current="page"]::after { display: none; }
  .nav-link[aria-current="page"] {
    box-shadow: inset 3px 0 0 var(--orange), inset 0 0 0 1px rgba(255, 122, 26, 0.35);
  }
  .nav-quick {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding-left: 0;
    padding-top: 14px;
    border-left: 0;
    border-top: 1px solid rgba(37, 54, 77, 0.85);
  }
  .nav-quick .btn { padding: 13px 16px; }
  .site-header[data-scrolled] .nav-capsule { padding: 16px; }
  .site-header[data-scrolled] .nav-link { padding: 13px 14px; font-size: 15px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

/* ---------- 10. 手机 ---------- */
@media (max-width: 767px) {
  body { font-size: 15.5px; }
  .brand-tagline { display: none; }
  .brand-island { padding: 8px 16px 8px 9px; }
  .brand-name { font-size: 14.5px; }
  .nav-toggle { padding: 9px 15px 9px 14px; }
  .layout-split,
  .layout-triad { grid-template-columns: minmax(0, 1fr); }
  .layout-triad > .annotation,
  .layout-split > .annotation { display: none; }
  .annotation { writing-mode: horizontal-tb; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-contact { grid-template-columns: minmax(0, 1fr); }
  .footer-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .rail-item { flex: 0 0 min(78vw, 300px); }
}

/* ---------- 11. 降低动效偏好 ---------- */
@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;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .card:hover, .footer-link:hover, .btn:hover { transform: none; }
  .scroll-meter-fill { transition: none; }
}