/* ============================================================
   易发老版 · 共享外壳样式 /assets/site.css
   ============================================================ */

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

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

body, h1, h2, h3, h4, h5, h6, p, ol, ul, figure, blockquote, dl, dd, pre { margin: 0; }
ol, ul { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
summary { cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 2. 变量 ---------- */
:root {
  --red: #B4472E;
  --red-deep: #7C2C1D;
  --red-dark: #5E2015;
  --jade: #1F7A5C;
  --jade-light: #6FBFA0;
  --neon: #6C3FA8;
  --gold: #E8B04B;
  --paper: #F7F2E7;
  --paper-soft: #EFE8D9;
  --ink: #1B1A18;
  --gray: #4A5A52;
  --archive: #D8D2C4;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "Noto Sans SC", system-ui, sans-serif;
  --font-serif: "Songti SC", "SimSun", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --rail-w: 264px;
  --bar-h: 58px;
  --wrap: 1180px;
  --shadow-stack: 0 1px 0 #FFFDF7, 3px 4px 0 rgba(27, 26, 24, 0.12);
  --shadow-lift: 0 14px 28px -16px rgba(27, 26, 24, 0.55);
}

/* ---------- 3. 中文排版与页面底 ---------- */
body {
  min-height: 100%;
  background-color: var(--paper);
  background-image: repeating-linear-gradient(0deg, rgba(74, 90, 82, 0.045) 0 1px, transparent 1px 28px);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  padding-top: var(--bar-h);
}

#main-content { display: block; outline: none; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: 8px; left: 8px;
  z-index: 95;
  padding: 9px 15px;
  background: var(--gold);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  border-radius: 2px;
  transform: translateY(-220%);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 4. 排版原子 ---------- */
.title-display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: 0.015em;
}
.title-section {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.34;
  letter-spacing: 0.01em;
}
.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--jade);
}
.lead {
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--gray);
}
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0; }

/* ---------- 5. 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}
.wrap--narrow { max-width: 860px; }

.section { padding-block: clamp(28px, 5vw, 60px); }

.grid { display: grid; gap: clamp(14px, 2vw, 24px); }
.grid--bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 22px);
}
.grid--bento > * { grid-column: span 12; }
.span-4, .span-5, .span-7, .span-8, .span-12 { grid-column: span 12; }

@media (min-width: 760px) {
  .grid--bento > .span-4 { grid-column: span 4; }
  .grid--bento > .span-5 { grid-column: span 5; }
  .grid--bento > .span-7 { grid-column: span 7; }
  .grid--bento > .span-8 { grid-column: span 8; }
}

.stack { display: flex; flex-direction: column; gap: 14px; }

/* ---------- 6. 按钮 / 标签 / 状态条 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 17px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-align: center;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}
.btn--primary { background: var(--red); color: var(--paper); box-shadow: 2px 3px 0 rgba(27, 26, 24, 0.35); }
.btn--gold { background: var(--gold); color: var(--ink); box-shadow: 2px 3px 0 rgba(27, 26, 24, 0.45); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--archive); }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--gold:hover { background: #F0BC60; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--archive);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}
.tag--gold { background: var(--gold); }
.tag--jade { background: var(--jade-light); }
.tag--neon { background: var(--neon); color: var(--paper); }

.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid rgba(247, 242, 231, 0.28);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(247, 242, 231, 0.78);
}
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.status-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 11px 15px;
  background: var(--paper-soft);
  border-left: 3px solid var(--jade);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}
.status-item { display: inline-flex; align-items: center; gap: 6px; }
.status-item strong { color: var(--red-deep); }

/* ---------- 7. 面包屑 ---------- */
.breadcrumb { padding-block: 10px; }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}
.breadcrumb-item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb-item + .breadcrumb-item::before { content: "/"; color: var(--archive); }
.breadcrumb-item[aria-current="page"] { color: var(--ink); }
.breadcrumb-item a { border-bottom: 1px solid transparent; }
.breadcrumb-item a:hover { border-bottom-color: var(--neon); }

/* ---------- 8. 卡片 / 数据块 ---------- */
.card {
  position: relative;
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--paper);
  border: 1px solid var(--archive);
  border-radius: 4px;
  box-shadow: var(--shadow-stack);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.card::before {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid rgba(216, 210, 196, 0.75);
  border-radius: 2px;
  pointer-events: none;
}
.card--tilt { transform: rotate(-2deg); }
.card--tilt:nth-child(even) { transform: rotate(2deg); }
.card--tilt:hover,
.card--tilt:focus-within { transform: rotate(0deg) translateY(-4px); box-shadow: var(--shadow-lift); }
.card-head { position: relative; z-index: 1; display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; justify-content: space-between; }
.card-title { position: relative; z-index: 1; font-family: var(--font-serif); font-size: 20px; font-weight: 700; }
.card-body { position: relative; z-index: 1; margin-top: 10px; color: var(--gray); font-size: 15.5px; }

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.15;
  color: var(--red-deep);
  font-variant-numeric: tabular-nums;
}
.stat-num--gold { color: var(--gold); }
.stat-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: var(--gray); }

/* ---------- 9. 可折叠档案卡 ---------- */
.archive-fold {
  border: 1px solid var(--archive);
  border-radius: 4px;
  background: var(--paper);
  box-shadow: var(--shadow-stack);
  overflow: hidden;
}
.archive-fold + .archive-fold { margin-top: 10px; }
.archive-fold > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  font-weight: 700;
  list-style: none;
}
.archive-fold > summary::-webkit-details-marker { display: none; }
.archive-fold > summary::after { content: "+"; font-family: var(--font-mono); font-size: 18px; color: var(--jade); }
.archive-fold[open] > summary::after { content: "–"; }
.archive-fold-body { padding: 0 16px 16px; color: var(--gray); font-size: 15.5px; }

/* ---------- 10. 图片位（页面阶段放占位） ---------- */
.plate {
  position: relative;
  margin: 0;
  overflow: hidden;
  background-color: var(--archive);
  background-image: repeating-linear-gradient(45deg, rgba(74, 90, 82, 0.13) 0 6px, transparent 6px 12px);
  border: 1px solid rgba(27, 26, 24, 0.2);
  border-radius: 3px;
}
.plate::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 0 1px rgba(247, 242, 231, 0.55);
  pointer-events: none;
}
.plate img { width: 100%; height: 100%; object-fit: cover; }
.plate--wide { aspect-ratio: 16 / 9; }
.plate--photo { aspect-ratio: 4 / 3; }
.plate--square { aspect-ratio: 1 / 1; }
.plate--tall { aspect-ratio: 3 / 4; }
.plate--tilt { transform: rotate(-1.5deg); }
.plate-cap {
  margin: 0;
  padding: 8px 12px;
  background: var(--paper);
  border-top: 1px solid var(--archive);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}

/* ---------- 11. 显现动效 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.has-js [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 12. 侧边轨道（移动端：顶栏 + 抽屉） ---------- */
.site-rail {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 70;
  height: var(--bar-h);
  color: var(--paper);
  background-color: var(--red-deep);
  background-image:
    linear-gradient(180deg, rgba(27, 26, 24, 0.12), rgba(27, 26, 24, 0.38)),
    repeating-linear-gradient(0deg, rgba(247, 242, 231, 0.05) 0 1px, transparent 1px 26px);
  border-bottom: 1px solid rgba(27, 26, 24, 0.5);
}
.site-rail a { color: inherit; }
.site-rail :focus-visible { outline-color: var(--gold); }

.rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 100%;
  padding: 0 14px;
}

.rail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  min-width: 0;
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border: 1px solid rgba(232, 176, 75, 0.72);
  border-radius: 2px;
  background: rgba(232, 176, 75, 0.14);
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
}
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.05em;
  line-height: 1.25;
  color: var(--paper);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: rgba(247, 242, 231, 0.62);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid rgba(247, 242, 231, 0.35);
  border-radius: 3px;
  background: rgba(247, 242, 231, 0.07);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.08em;
}
.nav-toggle-label { font-family: var(--font-mono); font-size: 12px; }
.nav-toggle-icon { display: grid; gap: 3px; width: 18px; }
.nav-toggle-icon span {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.22s ease, opacity 0.22s ease;
}
.site-rail[data-open] .nav-toggle-icon span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-rail[data-open] .nav-toggle-icon span:nth-child(2) { opacity: 0; }
.site-rail[data-open] .nav-toggle-icon span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.site-nav {
  position: absolute;
  top: 100%; left: 0; right: 0;
  max-height: 0;
  padding: 0 14px;
  overflow: hidden;
  visibility: hidden;
  background-color: var(--red-deep);
  background-image:
    linear-gradient(180deg, rgba(27, 26, 24, 0.2), rgba(27, 26, 24, 0.4)),
    repeating-linear-gradient(0deg, rgba(247, 242, 231, 0.05) 0 1px, transparent 1px 26px);
  border-bottom: 0 solid rgba(27, 26, 24, 0.5);
  box-shadow: 0 22px 34px -22px rgba(0, 0, 0, 0.75);
  transition: max-height 0.32s ease, padding 0.32s ease, visibility 0.32s ease, border-width 0.32s ease;
}
.site-rail[data-open] .site-nav {
  max-height: min(80vh, 680px);
  padding: 16px 14px 22px;
  overflow-y: auto;
  visibility: visible;
  border-bottom-width: 1px;
}

.nav-caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(247, 242, 231, 0.5);
  margin-bottom: 10px;
}
.nav-list { display: flex; flex-direction: column; gap: 2px; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 11px;
  border-left: 2px solid transparent;
  border-radius: 3px;
  color: rgba(247, 242, 231, 0.82);
  font-size: 15px;
  transition: background-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}
.nav-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(232, 176, 75, 0.85);
}
.nav-label { min-width: 0; }
.nav-link:hover { background: rgba(247, 242, 231, 0.09); color: var(--paper); transform: translateX(2px); }
.nav-link[aria-current="page"] {
  background: var(--paper);
  color: var(--red-deep);
  border-left-color: var(--neon);
  font-weight: 700;
  box-shadow: 2px 2px 0 rgba(27, 26, 24, 0.35);
}
.nav-link[aria-current="page"] .nav-num { color: var(--neon); }

.rail-spy {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
  padding: 10px 12px;
  border: 1px dashed rgba(247, 242, 231, 0.24);
  border-radius: 3px;
}
.rail-spy[hidden] { display: none; }
.rail-spy-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(247, 242, 231, 0.52);
}
.rail-spy-value { font-family: var(--font-serif); font-size: 15px; color: var(--gold); }

.rail-meter {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}
.rail-meter-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(247, 242, 231, 0.55);
}
.rail-meter-bar {
  display: block;
  height: 4px;
  border-radius: 2px;
  background: rgba(247, 242, 231, 0.16);
  overflow: hidden;
}
.rail-meter-fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--jade-light));
  transition: width 0.12s linear;
}
.rail-meter-num { font-family: var(--font-mono); font-size: 10px; color: var(--gold); }

.rail-action { width: 100%; margin-top: 16px; }

.rail-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(247, 242, 231, 0.14);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(247, 242, 231, 0.58);
}

/* ---------- 13. 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  color: var(--paper);
  background-color: var(--ink);
  background-image: repeating-linear-gradient(0deg, rgba(247, 242, 231, 0.035) 0 1px, transparent 1px 30px);
}
.site-foot a { color: inherit; }
.site-foot :focus-visible { outline-color: var(--gold); }

.foot-rule {
  height: 8px;
  background-image: repeating-linear-gradient(90deg,
    var(--red) 0 28px,
    var(--red-deep) 28px 52px,
    var(--gold) 52px 62px,
    var(--jade) 62px 86px);
}

.foot-top {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(32px, 5vw, 56px);
}

.foot-brand { display: flex; flex-direction: column; gap: 8px; }
.foot-brand-name {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper);
}
.foot-brand-line {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}
.foot-brand-note { font-size: 13px; color: rgba(247, 242, 231, 0.6); }

.foot-nav { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.foot-col-title {
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(247, 242, 231, 0.16);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--jade-light);
}
.foot-list { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.foot-link {
  display: inline-block;
  font-size: 14px;
  color: rgba(247, 242, 231, 0.8);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.foot-link:hover,
.foot-link:focus-visible { color: var(--gold); border-bottom-color: var(--neon); }

.foot-contact { padding-bottom: clamp(24px, 4vw, 38px); }
.foot-contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding: 16px 18px;
  border: 1px solid rgba(247, 242, 231, 0.16);
  border-left: 3px solid var(--jade);
  border-radius: 3px;
  background: rgba(247, 242, 231, 0.04);
}
.foot-contact-item {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(247, 242, 231, 0.82);
}
.foot-contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}
.copy-btn {
  padding: 3px 9px;
  border: 1px solid rgba(247, 242, 231, 0.3);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(247, 242, 231, 0.72);
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.copy-btn:hover { background: var(--gold); border-color: var(--gold); color: var(--ink); }
.copy-btn[data-done] { background: var(--jade); border-color: var(--jade); color: var(--paper); }

.foot-legal { background: rgba(0, 0, 0, 0.32); border-top: 1px solid rgba(247, 242, 231, 0.12); }
.foot-legal-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 14px;
}
.foot-legal-line,
.foot-meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(247, 242, 231, 0.55);
}

/* ---------- 14. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 16px; bottom: 16px;
  z-index: 65;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--red);
  color: var(--paper);
  border: 1px solid rgba(27, 26, 24, 0.42);
  border-radius: 3px;
  box-shadow: 3px 4px 0 rgba(27, 26, 24, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, background-color 0.18s ease;
}
.to-top[data-visible] { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--red-dark); }
.to-top-icon {
  width: 10px; height: 10px;
  border-top: 2px solid currentColor;
  border-left: 2px solid currentColor;
  transform: rotate(45deg);
}
.to-top-label { font-size: 13px; letter-spacing: 0.05em; }

/* ---------- 15. 平板 ---------- */
@media (min-width: 640px) {
  .rail-inner { padding: 0 22px; }
  .site-nav { padding-inline: 22px; }
  .site-rail[data-open] .site-nav { padding: 18px 22px 26px; }
  .foot-contact-line { padding: 18px 22px; }
}

/* ---------- 16. 桌面：常驻侧边轨道 ---------- */
@media (min-width: 1024px) {
  body { padding-top: 0; padding-left: var(--rail-w); }

  .site-rail {
    top: 0; left: 0; right: auto; bottom: 0;
    width: var(--rail-w);
    height: auto;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-bottom: 0;
    border-right: 1px solid rgba(27, 26, 24, 0.5);
    box-shadow: inset -1px 0 0 rgba(247, 242, 231, 0.1), 8px 0 22px -18px rgba(27, 26, 24, 0.85);
  }

  .rail-inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    height: 100%;
    padding: 26px 20px 22px;
    overflow-y: auto;
  }

  .rail-head { flex-direction: column; align-items: flex-start; gap: 0; width: auto; }
  .nav-toggle { display: none; }

  .site-nav {
    position: static;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: none;
    padding: 0;
    margin-top: 24px;
    overflow: visible;
    visibility: visible;
    background: none;
    background-image: none;
    border: 0;
    box-shadow: none;
    transition: none;
  }
  .nav-list { gap: 3px; }
  .rail-note { margin-top: auto; }

  .to-top { right: 26px; bottom: 26px; }
}

@media (min-width: 900px) {
  .foot-top { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.7fr); }
}

/* ---------- 17. 降低动效 ---------- */
@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;
  }
  .has-js [data-reveal] { opacity: 1; transform: none; }
}