/* =========================================================
   长乐坊备用站 · /assets/site.css
   共享外壳：reset / 变量 / 头部轨道 / 抽屉 / 页脚 / 通用组件
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }

:root {
  /* —— 色彩 —— */
  --paper: #F6F0E4;
  --paper-deep: #EFE5D4;
  --terracotta: #C25A2B;
  --terracotta-soft: #E8A87C;
  --slate: #5C6B6A;
  --slate-deep: #3A4746;
  --indigo: #2C3E7A;
  --indigo-soft: #7D8BC0;
  --ink: #241C17;
  --ink-soft: #453A32;
  --sand: #EADFCB;
  --stone: #8C8478;

  /* —— 尺寸 —— */
  --rail-w: 248px;
  --header-h: 62px;
  --page-max: 1280px;
  --gutter: clamp(18px, 4vw, 56px);

  /* —— 字体 —— */
  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  /* —— 动效 —— */
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --crease: 1px solid rgba(125, 139, 192, 0.34);
  --shadow-card: 0 2px 0 rgba(36, 28, 23, 0.06), 0 12px 28px -18px rgba(36, 28, 23, 0.55);
}

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

body {
  margin: 0;
  padding-top: var(--header-h);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 纸纹网点：固定覆盖层，不拦截任何交互 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 900;
  pointer-events: none;
  background-image: radial-gradient(rgba(36, 28, 23, 0.085) 0.6px, transparent 0.7px);
  background-size: 3px 3px;
  opacity: 0.5;
}

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

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--ink);
}
h1 { font-size: clamp(34px, 5.6vw, 66px); }
h2 { font-size: clamp(26px, 3.6vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 24px); }
h4 { margin: 0; font-size: 17px; font-weight: 700; line-height: 1.5; }

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

a {
  color: var(--indigo);
  text-decoration: none;
  transition: color 180ms var(--ease-out);
}
a:hover { color: var(--terracotta); }

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

:focus-visible {
  outline: 2px solid var(--indigo);
  outline-offset: 3px;
  border-radius: 2px;
}
.site-footer :focus-visible { outline-color: var(--terracotta-soft); }

/* =========================================================
   1. 跳转链接
   ========================================================= */
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  font-weight: 700;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform 200ms var(--ease-out);
}
.skip-link:focus { transform: translateY(0); color: var(--paper); }

/* =========================================================
   2. 头部外壳
   ========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 400;
  background: rgba(246, 240, 228, 0.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: var(--crease);
}

.header-mobile {
  position: relative;
  z-index: 440;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  height: var(--header-h);
  padding: 0 16px;
}

/* —— 品牌 —— */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { color: var(--ink); }

.brand-mark {
  width: 34px;
  height: 34px;
  flex: none;
  color: var(--terracotta);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }

.brand-name {
  font-family: var(--font-display);
  font-size: clamp(18px, 4.4vw, 21px);
  font-weight: 900;
  letter-spacing: 0.09em;
  color: var(--ink);
}

.brand-sub {
  display: none;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
}

/* —— 抽屉按钮 —— */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px 8px 11px;
  border: 1px solid rgba(44, 62, 122, 0.3);
  border-radius: 2px;
  background: rgba(246, 240, 228, 0.7);
  color: var(--indigo);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  transition: background 180ms var(--ease-out), border-color 180ms var(--ease-out);
}
.nav-toggle:hover { background: rgba(44, 62, 122, 0.09); border-color: var(--indigo); }

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 16px;
}
.nav-toggle-bars span {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 240ms var(--ease-out), opacity 160ms var(--ease-out);
}

.nav-toggle-label { line-height: 1; }

.site-header[data-open] .nav-toggle-bars span:nth-child(1) { transform: translateY(5px) 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(-5px) rotate(-45deg); }

/* —— 遮罩 —— */
.rail-scrim {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 410;
  background: rgba(36, 28, 23, 0.44);
  opacity: 0;
  visibility: hidden;
  transition: opacity 260ms var(--ease-out), visibility 0s linear 260ms;
}
.site-header[data-open] .rail-scrim {
  opacity: 1;
  visibility: visible;
  transition: opacity 260ms var(--ease-out), visibility 0s linear 0s;
}

/* —— 侧轨 / 抽屉 —— */
.rail {
  position: fixed;
  top: var(--header-h);
  right: 0;
  bottom: 0;
  z-index: 420;
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: min(86vw, 340px);
  padding: 22px 20px 26px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: linear-gradient(180deg, #F8F2E7 0%, #EDE3D1 100%);
  border-left: var(--crease);
  box-shadow: -24px 0 60px -34px rgba(36, 28, 23, 0.7);
  transform: translateX(103%);
  visibility: hidden;
  transition: transform 340ms var(--ease-out), visibility 0s linear 340ms;
}
.site-header[data-open] .rail {
  transform: none;
  visibility: visible;
  transition: transform 340ms var(--ease-out), visibility 0s linear 0s;
}

.rail-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(125, 139, 192, 0.28);
}
.rail-head .brand-sub { display: block; }

/* —— 导航 —— */
.site-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1 1 auto;
  min-height: 0;
}

.nav-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stone);
}
.nav-eyebrow::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, rgba(125, 139, 192, 0.55), transparent);
}

.nav-list { display: flex; flex-direction: column; gap: 2px; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px 9px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 2px 2px 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.5;
  transition: background 180ms var(--ease-out), color 180ms var(--ease-out), border-color 180ms var(--ease-out);
}
.nav-link:hover {
  background: rgba(234, 223, 203, 0.85);
  color: var(--ink);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--stone);
  transition: color 180ms var(--ease-out);
}
.nav-link:hover .nav-num { color: var(--terracotta); }

.nav-link[aria-current="page"] {
  background: var(--sand);
  border-left-color: var(--indigo);
  color: var(--indigo);
  font-weight: 700;
}
.nav-link[aria-current="page"] .nav-num { color: var(--indigo); opacity: 0.72; }

/* —— 轨道底部 —— */
.rail-foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(125, 139, 192, 0.28);
}
.rail-actions { display: flex; flex-direction: column; gap: 8px; }

.rail-note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.75;
  letter-spacing: 0.1em;
  color: var(--stone);
}

/* =========================================================
   3. 按钮
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out),
              background 200ms var(--ease-out), color 200ms var(--ease-out), border-color 200ms var(--ease-out);
}
.btn--block { width: 100%; }

.btn--primary {
  background: var(--terracotta);
  color: #FFF7EC;
  box-shadow: 0 2px 0 #8F3F1C;
}
.btn--primary:hover {
  background: #A94B21;
  color: #FFF7EC;
  transform: translateY(-2px);
  box-shadow: 0 4px 0 #8F3F1C;
}

.btn--ghost {
  background: transparent;
  border-color: rgba(44, 62, 122, 0.34);
  color: var(--indigo);
}
.btn--ghost:hover {
  background: rgba(44, 62, 122, 0.09);
  border-color: var(--indigo);
  color: var(--indigo);
  transform: translateY(-2px);
}

/* =========================================================
   4. 页脚
   ========================================================= */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 140px);
  background: linear-gradient(180deg, #3A4746 0%, #2C3635 100%);
  color: #EDE5D6;
}
.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--terracotta) 0 16%,
    var(--terracotta-soft) 16% 28%,
    var(--indigo-soft) 28% 40%,
    rgba(246, 240, 228, 0.18) 40% 100%
  );
}

.footer-inner {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 74px) var(--gutter) 32px;
}

.footer-top {
  display: grid;
  gap: 26px;
  padding-bottom: 34px;
  border-bottom: 1px solid rgba(246, 240, 228, 0.16);
}

.footer-brand { display: flex; align-items: center; gap: 14px; }

.footer-mark {
  width: 42px;
  height: 42px;
  flex: none;
  color: var(--terracotta-soft);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.footer-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.25;
  color: #F6F0E4;
}

.footer-tagline {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(234, 223, 203, 0.62);
}

.footer-intro {
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(246, 240, 228, 0.78);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px 24px;
  padding: 34px 0;
  border-bottom: 1px solid rgba(246, 240, 228, 0.16);
}

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

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--terracotta-soft);
}

.footer-list { display: flex; flex-direction: column; gap: 9px; }

.footer-list a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(246, 240, 228, 0.82);
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0 1px;
  transition: background-size 240ms var(--ease-out), color 180ms var(--ease-out);
}
.footer-list a:hover {
  color: #FFF6E9;
  background-size: 100% 1px;
}

.footer-list--contact { gap: 0; }

.footer-contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(246, 240, 228, 0.16);
  font-size: 14.5px;
  color: rgba(246, 240, 228, 0.86);
}

.footer-contact-key {
  flex: none;
  min-width: 34px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--terracotta-soft);
}

.footer-contact-value { flex: 1 1 auto; word-break: break-all; }

.copy-btn {
  flex: none;
  padding: 3px 8px;
  border: 1px solid rgba(246, 240, 228, 0.28);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: rgba(246, 240, 228, 0.8);
  transition: background 180ms var(--ease-out), color 180ms var(--ease-out), border-color 180ms var(--ease-out);
}
.copy-btn:hover {
  background: rgba(246, 240, 228, 0.12);
  border-color: var(--terracotta-soft);
  color: #FFF6E9;
}
.copy-btn[data-copied] {
  background: var(--terracotta);
  border-color: var(--terracotta);
  color: #FFF6E9;
}

.footer-note {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: rgba(234, 223, 203, 0.6);
}

.footer-base {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 24px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.85;
  letter-spacing: 0.06em;
  color: rgba(234, 223, 203, 0.58);
}

.footer-coverage { max-width: 52ch; }

.footer-legal { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-icp { color: rgba(234, 223, 203, 0.72); }
.footer-copyright { color: rgba(234, 223, 203, 0.52); }

/* =========================================================
   5. 通用排版与容器
   ========================================================= */
.wrap {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.wrap--narrow { max-width: 860px; }

.section { padding: clamp(48px, 7vw, 104px) 0; }
.section--tight { padding: clamp(32px, 5vw, 64px) 0; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--terracotta);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 1px;
  background: var(--terracotta);
}

.crease {
  height: 1px;
  border: 0;
  margin: clamp(48px, 7vw, 96px) 0;
  background: linear-gradient(90deg, transparent, rgba(125, 139, 192, 0.7), transparent);
}

.prose {
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.95;
  color: #3B322B;
}
.prose p + p { margin-top: 1.2em; }
.prose h2, .prose h3 { margin: 1.6em 0 0.6em; }
.prose ul, .prose ol { margin: 1em 0; padding-left: 1.2em; list-style: disc; }
.prose li + li { margin-top: 0.4em; }

.note {
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--terracotta-soft);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: var(--stone);
}

/* —— 面包屑 —— */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-top: clamp(20px, 4vw, 36px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--stone);
}
.breadcrumb-sep { opacity: 0.5; }
.breadcrumb [aria-current="page"] { color: var(--ink); }

/* =========================================================
   6. 网格与卡片
   ========================================================= */
.grid { display: grid; gap: clamp(14px, 2vw, 22px); }
.grid--bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--sand);
  border: 1px solid rgba(36, 28, 23, 0.1);
  border-radius: 3px;
  box-shadow: var(--shadow-card);
  transition: transform 220ms var(--ease-out), box-shadow 220ms var(--ease-out), border-color 220ms var(--ease-out);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 0 rgba(36, 28, 23, 0.05), 0 18px 34px -20px rgba(36, 28, 23, 0.6);
}

.card--glass {
  background: rgba(246, 240, 228, 0.64);
  border: 1px solid rgba(246, 240, 228, 0.75);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.card--glass:hover { -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }

.card--dark {
  background: var(--slate-deep);
  border-color: rgba(246, 240, 228, 0.14);
  color: #EDE5D6;
}
.card--dark h2, .card--dark h3, .card--dark h4 { color: #F6F0E4; }

.card--accent {
  background: var(--terracotta);
  border-color: transparent;
  color: #FFF7EC;
}
.card--accent h2, .card--accent h3, .card--accent h4, .card--accent p { color: #FFF7EC; }

/* =========================================================
   7. 筛选按钮
   ========================================================= */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  padding: 7px 14px;
  border: 1px solid rgba(44, 62, 122, 0.3);
  border-radius: 999px;
  background: rgba(246, 240, 228, 0.62);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--indigo);
  transition: background 180ms var(--ease-out), color 180ms var(--ease-out),
              border-color 180ms var(--ease-out), opacity 180ms var(--ease-out);
}
.chip:hover { background: rgba(44, 62, 122, 0.1); }
.chip[aria-pressed="true"] {
  background: var(--indigo);
  border-color: var(--indigo);
  color: var(--paper);
}

/* =========================================================
   8. 折叠面板
   ========================================================= */
.accordion { display: flex; flex-direction: column; gap: 8px; }

.accordion-item {
  background: var(--sand);
  border: 1px solid rgba(36, 28, 23, 0.12);
  border-radius: 3px;
  overflow: hidden;
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  text-align: left;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  transition: background 180ms var(--ease-out);
}
.accordion-trigger:hover { background: rgba(246, 240, 228, 0.7); }
.accordion-trigger::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--terracotta);
}
.accordion-trigger[aria-expanded="true"]::after { content: "−"; }

.accordion-panel {
  padding: 0 18px 18px;
  font-size: 15.5px;
  line-height: 1.9;
  color: #3B322B;
}
.accordion-panel[hidden] { display: none; }

/* =========================================================
   9. 图片容器基础规则（页面阶段放置图片）
   ========================================================= */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 3px;
  background: var(--sand);
  border: 1px solid rgba(36, 28, 23, 0.08);
}
.media-frame img,
.media-frame > svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--panorama { aspect-ratio: 21 / 9; }

.media-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--stone);
}

/* =========================================================
   10. 滚动显现协议
   ========================================================= */
[data-reveal] { opacity: 1; transform: none; }
[data-reveal].is-reveal-pending { opacity: 0; transform: translateY(16px); }
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  transition: opacity 420ms var(--ease-out), transform 420ms var(--ease-out);
}

/* =========================================================
   11. 响应式
   ========================================================= */
@media (min-width: 720px) {
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--bento { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 820px) {
  .footer-top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: end;
    gap: clamp(32px, 5vw, 80px);
  }
  .footer-base {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-w);
  }

  .site-header {
    top: 0;
    right: auto;
    bottom: 0;
    left: 0;
    width: var(--rail-w);
    background: linear-gradient(180deg, #F8F2E7 0%, #EFE5D4 100%);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    border-bottom: 0;
    border-right: var(--crease);
  }

  .header-mobile { display: none; }
  .rail-scrim { display: none; }

  .rail {
    position: static;
    width: auto;
    height: 100%;
    padding: 26px 20px 22px;
    border-left: 0;
    box-shadow: none;
    transform: none;
    visibility: visible;
    transition: none;
  }

  .brand-sub { display: block; }

  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.3fr); }
}

/* =========================================================
   12. 降低动效偏好
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .btn:hover, .card:hover { transform: none; }
  [data-reveal],
  [data-reveal].is-reveal-pending {
    opacity: 1;
    transform: none;
  }
  .rail, .rail-scrim { transition: none; }
}