/* ==========================================================================
   开元财神捕鱼 · 共享样式表 /assets/site.css
   深海墨蓝打底，财神红与鎏金点睛，框架式导航 + 极细边界 + 微阴影
   ========================================================================== */

/* ---------- 0. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; }

/* ---------- 1. 变量 ---------- */
:root {
  --ink-deep: #071A2F;
  --ink-blue: #0E2C4C;
  --ink-blue-soft: #12365C;
  --wave: #2E9E9B;
  --glow: #7FE3D4;
  --red: #C8102E;
  --gold: #E8B33B;
  --gold-light: #F6D98A;
  --paper: #F5F1E8;
  --black: #14161A;
  --mist: #8A929C;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "STZhongsong", "Songti SC", "SimSun", serif;
  --font-body: "Noto 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;

  --shell-w: 1280px;
  --gutter: clamp(20px, 4vw, 44px);
  --header-h: 76px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --line-soft: rgba(127, 227, 212, 0.16);
  --line-mid: rgba(127, 227, 212, 0.28);
  --line-strong: rgba(127, 227, 212, 0.46);

  --text-body: rgba(245, 241, 232, 0.78);
  --text-dim: rgba(245, 241, 232, 0.62);

  --shadow-card: 0 22px 44px -30px rgba(0, 0, 0, 0.95), 0 1px 0 rgba(127, 227, 212, 0.07);
}

/* ---------- 2. 中文排版基底 ---------- */
body {
  min-height: 100vh;
  padding-top: var(--header-h);
  background-color: var(--ink-deep);
  background-image:
    radial-gradient(120% 58% at 10% -8%, rgba(200, 16, 46, 0.20), transparent 58%),
    radial-gradient(96% 54% at 92% 2%, rgba(46, 158, 155, 0.22), transparent 62%),
    radial-gradient(70% 40% at 50% -4%, rgba(232, 179, 59, 0.10), transparent 70%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: rgba(232, 179, 59, 0.34); color: var(--paper); }

/* 桌面端左右极细框线：让导航成为页面视觉边框的一部分 */
body::before,
body::after {
  content: "";
  position: fixed;
  top: 0;
  bottom: 0;
  width: 1px;
  z-index: 5;
  pointer-events: none;
  display: none;
  background: linear-gradient(180deg, transparent, rgba(127, 227, 212, 0.30) 12%, rgba(127, 227, 212, 0.30) 88%, transparent);
}
body::before { left: 26px; }
body::after { right: 26px; }
@media (min-width: 1400px) {
  body::before, body::after { display: block; }
}

/* ---------- 3. 焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 4. 布局骨架 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
  transition: border-color 0.35s var(--ease);
}
[data-section].is-current .section-head { border-color: rgba(232, 179, 59, 0.5); }
[data-section] { scroll-margin-top: calc(var(--header-h) + 24px); }

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, rgba(127, 227, 212, 0.34), rgba(127, 227, 212, 0));
}

.grid { display: grid; gap: clamp(20px, 2.6vw, 36px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 1024px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 5. 文字组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--glow);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
  flex: 0 0 auto;
}

.display-1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 7vw, 88px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.display-2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.lead {
  max-width: 38em;
  font-size: clamp(17px, 1.5vw, 19px);
  line-height: 1.9;
  color: var(--text-body);
}

.prose {
  max-width: 38em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-body);
}
.prose p + p { margin-top: 1.1em; }
.prose h2, .prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -0.01em;
  margin-top: 1.8em;
}
.prose h2 { font-size: clamp(24px, 2.6vw, 32px); line-height: 1.3; }
.prose h3 { font-size: clamp(19px, 2vw, 24px); line-height: 1.4; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--glow);
  background: rgba(127, 227, 212, 0.08);
  border: 1px solid rgba(127, 227, 212, 0.24);
  white-space: nowrap;
}
.tag--gold { color: var(--gold-light); background: rgba(232, 179, 59, 0.10); border-color: rgba(232, 179, 59, 0.34); }
.tag--red { color: #FFD6DC; background: rgba(200, 16, 46, 0.20); border-color: rgba(200, 16, 46, 0.48); }

.coord {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--glow);
}
.coord::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(232, 179, 59, 0.18);
  flex: 0 0 auto;
}

/* ---------- 6. 卡片与图版容器 ---------- */
.card {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 2.4vw, 32px);
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  background: linear-gradient(160deg, rgba(14, 44, 76, 0.94), rgba(7, 26, 47, 0.96));
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -40%;
  width: 40%;
  height: 100%;
  pointer-events: none;
  background: linear-gradient(100deg, transparent, rgba(246, 217, 138, 0.12), transparent);
  transform: translateX(0);
  transition: transform 0.75s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-mid);
  box-shadow: 0 28px 54px -32px rgba(0, 0, 0, 0.98), 0 0 0 1px rgba(127, 227, 212, 0.12);
}
.card:hover::before { transform: translateX(380%); }

.panel-paper {
  padding: clamp(26px, 4vw, 52px);
  border-radius: 22px;
  background: var(--paper);
  color: var(--black);
  border: 1px solid rgba(20, 22, 26, 0.08);
  box-shadow: 0 30px 60px -40px rgba(0, 0, 0, 0.9);
}
.panel-paper h2, .panel-paper h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.01em;
}
.panel-paper a { color: #0E2C4C; text-decoration: underline; text-underline-offset: 3px; }
.panel-paper .prose { color: rgba(20, 22, 26, 0.82); }

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(150deg, rgba(46, 158, 155, 0.30), rgba(7, 26, 47, 0.92) 56%, rgba(200, 16, 46, 0.24));
  isolation: isolate;
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(58% 48% at 20% 10%, rgba(246, 217, 138, 0.30), transparent 64%);
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }

/* ---------- 7. 索引列表与面包屑 ---------- */
.route-list { display: grid; gap: 0; }
.route-list a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text-body);
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}
.route-list a:hover { color: var(--gold); padding-left: 8px; }
.route-list__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--glow);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.breadcrumb a { color: var(--text-body); transition: color 0.25s var(--ease); }
.breadcrumb a:hover { color: var(--glow); }
.breadcrumb__sep { color: rgba(127, 227, 212, 0.45); }

/* ---------- 8. 跳过导航 ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 200;
  padding: 12px 22px;
  border-radius: 0 0 12px 12px;
  background: var(--gold);
  color: #2A1A03;
  font-weight: 700;
  font-size: 15px;
  transition: top 0.22s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 9. 页头 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(7, 26, 47, 0.98), rgba(7, 26, 47, 0.86));
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line-soft);
}
.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  overflow: hidden;
  background: rgba(127, 227, 212, 0.10);
}
.site-header__progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--red) 0%, var(--gold) 46%, var(--gold-light) 100%);
  box-shadow: 0 0 12px rgba(232, 179, 59, 0.65);
  transition: width 0.14s linear;
}
.site-header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.6vw, 36px);
}

/* 品牌字标 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.brand__mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 52% 52% 46% 46% / 58% 58% 42% 42%;
  background: linear-gradient(150deg, var(--gold-light), var(--gold) 48%, #A9761C);
  box-shadow: 0 0 0 1px rgba(246, 217, 138, 0.45), 0 8px 20px -10px rgba(232, 179, 59, 0.95);
}
.brand__mark::before {
  content: "";
  position: absolute;
  right: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 10px solid var(--gold);
  filter: drop-shadow(0 0 6px rgba(232, 179, 59, 0.5));
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink-deep);
  box-shadow: 0 0 0 1.5px rgba(7, 26, 47, 0.35);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.14; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.04em;
  color: var(--paper);
}
.brand__meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--glow);
  opacity: 0.78;
}

/* 栏目索引：导航即边框 */
.site-nav { margin-left: auto; }
.site-nav__list { display: flex; align-items: stretch; height: var(--header-h); }
.site-nav__list li { display: flex; }
.site-nav__list a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 9px;
  height: 100%;
  padding: 0 18px;
  font-size: 15px;
  color: rgba(245, 241, 232, 0.72);
  border-left: 1px solid var(--line-soft);
  transition: color 0.28s var(--ease), background-color 0.28s var(--ease);
}
.site-nav__list li:last-child a { border-right: 1px solid var(--line-soft); }
.site-nav__list a::before {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: rgba(127, 227, 212, 0.55);
  transition: color 0.28s var(--ease);
}
.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 17px;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease);
}
.site-nav__list a:hover { color: var(--paper); background: rgba(127, 227, 212, 0.06); }
.site-nav__list a:hover::before { color: var(--gold); }
.site-nav__list a[aria-current="page"] { color: var(--gold); }
.site-nav__list a[aria-current="page"]::before { color: var(--gold); }
.site-nav__list a[aria-current="page"]::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  margin-left: 8px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border: 0;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), background-color 0.28s var(--ease), color 0.28s var(--ease);
}
.btn--sm { padding: 10px 20px; font-size: 14px; }
.btn--gold {
  color: #2A1A03;
  background: linear-gradient(135deg, var(--gold-light), var(--gold) 52%, #C08E22);
  box-shadow: 0 0 0 1px rgba(246, 217, 138, 0.55), 0 0 0 4px rgba(200, 16, 46, 0.22), 0 12px 28px -14px rgba(232, 179, 59, 0.95);
}
.btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(246, 217, 138, 0.8), 0 0 0 4px rgba(200, 16, 46, 0.34), 0 18px 34px -14px rgba(232, 179, 59, 1);
}
.btn--gold:active { transform: translateY(0); }
.btn--ghost {
  color: var(--glow);
  background: transparent;
  box-shadow: inset 0 0 0 1px var(--line-mid);
}
.btn--ghost:hover {
  color: var(--paper);
  background: rgba(127, 227, 212, 0.10);
  box-shadow: inset 0 0 0 1px var(--glow);
}

/* 移动端栏目索引抽屉按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: rgba(127, 227, 212, 0.06);
  color: var(--paper);
  font-size: 14px;
  font-weight: 600;
  transition: background-color 0.28s var(--ease), border-color 0.28s var(--ease);
}
.nav-toggle:hover { background: rgba(127, 227, 212, 0.13); border-color: var(--line-mid); }
.nav-toggle__bars { position: relative; display: block; width: 18px; height: 12px; flex: 0 0 18px; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--gold);
  transition: transform 0.3s var(--ease), top 0.3s var(--ease);
}
.nav-toggle__bars::before { top: 1px; }
.nav-toggle__bars::after { top: 9px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 5px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 5px; transform: rotate(-45deg); }
.nav-toggle__label { line-height: 1; }

/* ---------- 10. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  border-top: 1px solid var(--line-soft);
  background-image:
    radial-gradient(90% 70% at 8% 0%, rgba(200, 16, 46, 0.22), transparent 62%),
    radial-gradient(82% 70% at 92% 6%, rgba(46, 158, 155, 0.24), transparent 64%),
    linear-gradient(180deg, #08203A 0%, var(--ink-deep) 58%);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232, 179, 59, 0.7), transparent);
}
.site-footer__inner { padding-block: clamp(48px, 6.5vw, 84px) 0; }

.footer-grid {
  display: grid;
  gap: 42px 38px;
  grid-template-columns: 1.7fr 1fr 1fr 1fr 1fr;
}
.footer-brand { max-width: 330px; }
.footer-brand .brand { margin-bottom: 18px; }
.footer-brand__desc {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-dim);
  max-width: 34em;
}

.footer-col__title {
  position: relative;
  margin-bottom: 18px;
  padding-bottom: 10px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--paper);
}
.footer-col__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--red);
}
.footer-col ul { display: grid; gap: 11px; }
.footer-col a {
  display: inline-block;
  font-size: 15px;
  color: var(--text-dim);
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}
.footer-col a:hover { color: var(--glow); padding-left: 6px; }

.footer-contact {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
  overflow-wrap: anywhere;
}
.footer-contact__key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--glow);
  opacity: 0.82;
}

.footer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  margin-top: clamp(44px, 6vw, 66px);
  padding-block: 22px;
  border-top: 1px solid var(--line-soft);
}
.footer-bar__links { display: flex; flex-wrap: wrap; gap: 10px 24px; }
.footer-bar__links a {
  font-size: 14px;
  color: var(--glow);
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(127, 227, 212, 0.32);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.footer-bar__links a:hover { color: var(--gold); border-color: var(--gold); }
.footer-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 11. 显现与滚动状态 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

body.nav-open { overflow: hidden; }

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1180px) {
  .footer-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; max-width: 560px; }
}
@media (max-width: 1120px) {
  .site-nav__list a { padding: 0 13px; font-size: 14px; }
  .site-nav__list a::before { display: none; }
  .site-nav__list a::after { left: 13px; right: 13px; bottom: 15px; }
}

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    z-index: 95;
    width: min(86vw, 340px);
    margin-left: 0;
    padding: 8px 0 36px;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: linear-gradient(180deg, rgba(14, 44, 76, 0.99), rgba(7, 26, 47, 0.99));
    border-left: 1px solid var(--line-soft);
    box-shadow: -34px 0 66px -44px rgba(0, 0, 0, 0.96);
    transform: translateX(104%);
    transition: transform 0.38s var(--ease);
    visibility: hidden;
  }
  .site-nav[data-open] { transform: translateX(0); visibility: visible; }
  .site-nav__list { display: block; height: auto; }
  .site-nav__list li { display: block; }
  .site-nav__list a {
    height: auto;
    padding: 16px 26px;
    font-size: 16px;
    border-left: 0;
    border-bottom: 1px solid var(--line-soft);
    background: none;
  }
  .site-nav__list li:last-child a { border-right: 0; }
  .site-nav__list a::before { display: inline; }
  .site-nav__list a::after {
    left: 26px;
    right: auto;
    width: 26px;
    bottom: 12px;
  }
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 28px; }
}
@media (max-width: 640px) {
  :root { --header-h: 66px; }
  body { font-size: 16px; }
  .brand__name { font-size: 17px; }
  .brand__meta { display: none; }
  .btn--sm { padding: 9px 16px; font-size: 13px; }
  .nav-toggle { padding: 9px 13px; }
  .nav-toggle__label { display: none; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-bar { flex-direction: column; align-items: flex-start; }
}

/* ---------- 13. 动效偏好 ---------- */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
@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; transform: none; }
  .card:hover { transform: none; }
  .site-nav { transition: none; }
}