:root {
  --color-surface: #f8f8f8;
  --color-surface-alt: #f0efef;
  --color-surface-deep: #e4e3e3;
  --color-ink: #4f454a;
  --color-ink-soft: #766a70;
  --color-ink-muted: #857a80;
  --color-line: #dad8d9;
  --color-primary: #dd1d7e;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #f4d9e7;
  --color-accent: #54810e;
  --color-accent-ink: #ffffff;
  --color-highlight: #dae3ce;
  --color-focus: #4c7a06;
  --color-contrast-surface: #1b0d14;
  --color-contrast-ink: #e7e4e6;
  --color-contrast-line: #483c42;
  --color-contrast-accent: #96e718;
  --overlay-scrim: linear-gradient(180deg, rgba(27, 13, 20, 0.35) 0%, rgba(27, 13, 20, 0.72) 55%, rgba(27, 13, 20, 0.92) 100%);
  --font-heading: "Source Han Sans SC", "Noto Sans SC", SimHei, "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 12.9px;
  --text-sm: 16.1px;
  --text-base: 18px;
  --text-lg: 22.5px;
  --text-xl: 28.1px;
  --text-2xl: 35.2px;
  --text-3xl: 43.9px;
  --text-4xl: 54.9px;
  --text-display: clamp(44px, 9.0vw, 115px);
  --text-figure: clamp(37px, 6.5vw, 83px);
  --weight-heading: 822;
  --weight-body: 400;
  --leading-body: 1.74;
  --leading-heading: 1.22;
  --tracking-heading: -0.008em;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 15px;
  --radius-pill: 999px;
  --border-thin: 2px;
  --border-thick: 3px;
  --shadow-1: 0 1px 0 rgba(79, 69, 74, 0.12);
  --shadow-2: 0 2px 0 rgba(79, 69, 74, 0.18);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1160px;
  --measure: 74ch;
  --gutter: 24px;
  --section-y: 80px;
  --section-y-lg: 112px;
}

/* ===== reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-weight: var(--weight-body);
}
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}
p { margin: 0 0 var(--space-2); }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: var(--color-ink); text-decoration: none; transition: color 140ms ease-out, background-color 140ms ease-out, border-color 140ms ease-out; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; margin: 0; }
button { cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: var(--border-thick) solid var(--color-focus); outline-offset: 2px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%);
  white-space: nowrap; border: 0;
}

/* ===== 排版工具 ===== */
.h-display { font-size: var(--text-display); line-height: 0.96; letter-spacing: -0.02em; }
.h-figure { font-family: var(--font-mono); font-size: var(--text-figure); line-height: 1; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.h-section { font-size: var(--text-3xl); }
.h-block { font-size: var(--text-2xl); }
.h-card { font-size: var(--text-xl); }
.h-item { font-size: var(--text-lg); }
.t-lead { font-size: var(--text-lg); color: var(--color-ink-soft); max-width: var(--measure); }
.t-meta { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.06em; color: var(--color-ink-muted); }
.eyebrow {
  display: inline-block; font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--color-ink-muted);
  border-left: var(--border-thin) solid var(--color-accent); padding-left: var(--space-1);
}
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ===== 容器与栅格 ===== */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background: var(--color-surface-alt); }
.section--deep { background: var(--color-surface-deep); }
.section--dark { background: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.section--dark .t-lead,
.section--dark .eyebrow { color: var(--color-contrast-ink); }
.section--dark .eyebrow { border-left-color: var(--color-contrast-accent); }
.section--dark a { color: var(--color-contrast-accent); }
.section--dark a.btn-primary { color: var(--color-primary-ink); }
.section--dark .divider { border-top-color: var(--color-contrast-line); }

.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gutter); }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

/* ===== 强调与分隔 ===== */
.rule-lead { position: relative; padding-left: var(--space-3); }
.rule-lead::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0;
  width: var(--border-thin); background: var(--color-line);
}
.rule-lead::after {
  content: ""; position: absolute; left: 0; top: 0; width: var(--border-thin);
  height: 1.8em; background: var(--color-primary);
}
.section--dark .rule-lead::before { background: var(--color-contrast-line); }
.section--dark .rule-lead::after { background: var(--color-contrast-accent); }

.divider { border: 0; border-top: var(--border-thin) solid var(--color-line); margin-block: var(--space-6); }
.divider--accent { border-top-color: var(--color-primary); }

/* ===== 按钮与标签 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-1);
  padding: 12px 22px; border-radius: var(--radius-pill);
  border: var(--border-thin) solid transparent;
  font-family: var(--font-heading); font-weight: 700; font-size: var(--text-sm); line-height: 1.2;
  transition: background-color 140ms ease-out, border-color 140ms ease-out, color 140ms ease-out, transform 140ms ease-out;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--color-primary); color: var(--color-primary-ink); border-color: var(--color-primary); box-shadow: var(--shadow-2); }
.btn-primary:hover { background: color-mix(in srgb, var(--color-primary) 84%, #000); border-color: color-mix(in srgb, var(--color-primary) 84%, #000); }
.btn-accent { background: var(--color-accent); color: var(--color-accent-ink); border-color: var(--color-accent); }
.btn-accent:hover { background: color-mix(in srgb, var(--color-accent) 84%, #000); border-color: color-mix(in srgb, var(--color-accent) 84%, #000); }
.btn-ghost { background: transparent; color: var(--color-ink); border-color: var(--color-line); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--sm { padding: 8px 14px; font-size: var(--text-xs); }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: var(--radius-pill);
  border: var(--border-thin) solid var(--color-line); background: var(--color-surface);
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-ink-soft);
}
.chip--primary { background: var(--color-primary-soft); border-color: var(--color-primary); color: var(--color-ink); }
.chip--accent { background: var(--color-highlight); border-color: var(--color-accent); color: var(--color-ink); }

/* ===== 面包屑 ===== */
.breadcrumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  padding-block: var(--space-3);
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-ink-muted);
}
.breadcrumbs li { display: flex; align-items: center; gap: 6px; }
.breadcrumbs li + li::before { content: "/"; color: var(--color-line); }
.breadcrumbs a { color: var(--color-ink-soft); border-bottom: var(--border-thin) solid var(--color-line); padding-bottom: 1px; }
.breadcrumbs a:hover { color: var(--color-primary); border-bottom-color: var(--color-focus); }

/* ===== 左侧数据索引 ===== */
.index-rail { border-left: var(--border-thin) solid var(--color-line); padding-left: var(--space-2); }
.index-rail--sticky { position: sticky; top: var(--space-4); }
.index-rail-title {
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.14em;
  color: var(--color-ink-muted); margin-bottom: var(--space-2);
}
.index-rail a {
  display: block; padding: 6px 0 6px 12px; font-size: var(--text-sm); color: var(--color-ink-soft);
  border-left: var(--border-thin) solid transparent;
  margin-left: calc(-1 * var(--space-2) - var(--border-thin));
  transition: color 140ms ease-out, border-color 140ms ease-out;
}
.index-rail a:hover { color: var(--color-ink); }
.index-rail a.is-active { color: var(--color-ink); font-weight: 700; border-left-color: var(--color-primary); }

/* ===== 面板 ===== */
.panel {
  background: var(--color-surface); border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md); padding: var(--space-3);
  transition: border-color 140ms ease-out, background-color 140ms ease-out, transform 140ms ease-out;
}
.panel--round { border-radius: var(--radius-lg); }
.panel--cut {
  border-radius: var(--radius-sm);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}
.panel--deep { background: var(--color-surface-deep); }
.panel--dark { background: var(--color-contrast-surface); color: var(--color-contrast-ink); border-color: var(--color-contrast-line); }
.panel--dark a { color: var(--color-contrast-accent); }
.panel--dark a.btn-primary { color: var(--color-primary-ink); }
.panel--edge { border-left: var(--border-thick) solid var(--color-primary); }
.panel--interactive:hover {
  border-color: var(--color-primary); transform: translateY(-2px);
  background: color-mix(in srgb, var(--color-primary-soft) 42%, var(--color-surface));
}

/* ===== 深色读数面板 ===== */
.data-panel {
  background: var(--color-contrast-surface); color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg); padding: var(--space-4);
}
.data-panel a { color: var(--color-contrast-accent); }
.data-panel .t-meta { color: var(--color-contrast-ink); opacity: 0.72; }
.data-panel .divider { border-top-color: var(--color-contrast-line); }
.data-figure {
  font-family: var(--font-mono); font-size: var(--text-figure); line-height: 1;
  letter-spacing: -0.02em; color: var(--color-contrast-accent); font-variant-numeric: tabular-nums;
  margin: 0;
}
.data-label {
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.12em;
  color: var(--color-contrast-ink); opacity: 0.72; margin: 0;
}

/* ===== 图片容器（页面阶段放占位） ===== */
.figure-stack { display: grid; gap: var(--space-2); }
.figure-frame {
  position: relative; overflow: hidden; background: var(--color-surface-deep);
  border: var(--border-thick) solid var(--color-contrast-surface);
  border-radius: var(--radius-md); box-shadow: var(--shadow-2);
}
.figure-frame img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16 / 9; }
.figure-frame--cut {
  border-radius: var(--radius-sm);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}
.figure-frame--tall img { aspect-ratio: 4 / 5; }
.figure-frame--wide img { aspect-ratio: 21 / 9; }
.figure-scrim { position: absolute; inset: 0; background: var(--overlay-scrim); pointer-events: none; }
.figure-caption {
  position: absolute; left: var(--space-1); bottom: var(--space-1); max-width: calc(100% - var(--space-2));
  background: var(--color-contrast-surface); color: var(--color-contrast-ink);
  font-family: var(--font-mono); font-size: var(--text-xs); line-height: 1.45;
  padding: 6px 10px; border-radius: var(--radius-sm);
  border-left: var(--border-thin) solid var(--color-contrast-accent);
}
.figure-label {
  position: absolute; right: var(--space-1); top: var(--space-1);
  background: var(--color-primary); color: var(--color-primary-ink);
  font-family: var(--font-mono); font-size: var(--text-xs); padding: 4px 8px;
  border-radius: var(--radius-sm);
}

/* ===== 数据表格 ===== */
.data-table {
  font-size: var(--text-sm); border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md); overflow: hidden;
}
.data-table th, .data-table td {
  padding: 12px 14px; text-align: left; vertical-align: top;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.data-table thead th {
  background: var(--color-surface-deep); font-family: var(--font-mono);
  font-size: var(--text-xs); letter-spacing: 0.1em; color: var(--color-ink-soft);
}
.data-table tbody tr:nth-child(even) { background: var(--color-surface-alt); }
.data-table tbody tr[data-expandable] { cursor: pointer; }
.data-table tbody tr[data-expandable]:hover { background: var(--color-primary-soft); }
.data-table tr.is-open { background: var(--color-highlight); }
.data-table .expand-cell { background: var(--color-highlight); }
.data-table .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; }

/* ===== 孟菲斯装饰形状 ===== */
.deco-layer { position: relative; }
.deco { position: absolute; pointer-events: none; z-index: 0; }
.deco--ring { width: 96px; height: 96px; border: var(--border-thick) solid var(--color-primary); border-radius: 50%; }
.deco--pill { width: 120px; height: 22px; background: var(--color-accent); border-radius: var(--radius-pill); }
.deco--dot { width: 20px; height: 20px; background: var(--color-primary); border-radius: 50%; }
.deco--tri { width: 0; height: 0; border-left: 26px solid transparent; border-right: 26px solid transparent; border-bottom: 42px solid var(--color-primary-soft); }
.deco--sq { width: 44px; height: 44px; background: var(--color-primary-soft); border: var(--border-thin) solid var(--color-primary); border-radius: var(--radius-sm); }
.deco--osc { width: 110px; height: 26px; border: var(--border-thin) solid var(--color-contrast-accent); border-radius: var(--radius-pill); }

.tilt-a { transform: rotate(-1.5deg); }
.tilt-b { transform: rotate(1.5deg); }
.tilt-c { transform: rotate(-2.5deg); }

/* ===== 入场 ===== */
[data-reveal] { opacity: 0; transform: translateY(4px); transition: opacity 180ms ease-out, transform 180ms ease-out; }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ===== 跳转链接 ===== */
.skip-link {
  position: absolute; left: var(--space-2); top: -120px; z-index: 300;
  background: var(--color-primary); color: var(--color-primary-ink);
  padding: 10px 18px; border-radius: var(--radius-sm);
  font-family: var(--font-heading); font-weight: 700; font-size: var(--text-sm);
  transition: top 140ms ease-out;
}
.skip-link:focus { top: var(--space-2); }

/* ===== 页头 ===== */
.site-header {
  position: relative; z-index: 100;
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-contrast-surface);
}
.header-strip { background: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.header-strip-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-2); min-height: 40px; flex-wrap: wrap; padding-block: 4px;
}
.strip-note {
  display: inline-flex; align-items: center; gap: var(--space-1); margin: 0;
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.06em;
  color: var(--color-contrast-ink);
}
.header-tools { display: inline-flex; align-items: center; gap: var(--space-2); }
.strip-link {
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-contrast-accent);
  border-bottom: var(--border-thin) solid transparent; padding-bottom: 1px;
}
.strip-link:hover { color: var(--color-contrast-ink); border-bottom-color: var(--color-contrast-accent); }

.refresh-dot {
  display: inline-block; width: 10px; height: 10px; border-radius: 50%; flex: none;
  background: var(--color-contrast-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-contrast-accent) 24%, transparent);
  animation: bsPulse 2.4s ease-in-out infinite;
}
@keyframes bsPulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.nav-toggle {
  display: none; align-items: center;
  background: var(--color-contrast-accent); color: var(--color-contrast-surface);
  border: var(--border-thin) solid var(--color-contrast-accent);
  border-radius: var(--radius-pill); padding: 6px 16px;
  font-family: var(--font-heading); font-weight: 700; font-size: var(--text-xs);
}
.nav-toggle[aria-expanded="true"] {
  background: var(--color-primary); border-color: var(--color-primary); color: var(--color-primary-ink);
}

.masthead {
  display: flex; justify-content: center; text-align: center;
  padding-block: var(--space-4) var(--space-3);
}
.brand { display: grid; gap: 6px; justify-items: center; }
.brand-mark {
  position: relative; padding-bottom: var(--space-1);
  font-family: var(--font-heading); font-weight: var(--weight-heading);
  font-size: var(--text-4xl); line-height: 1; letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.brand-mark::after {
  content: ""; position: absolute; left: 50%; bottom: 0; width: 72%; height: 5px;
  transform: translateX(-50%) rotate(-1.5deg);
  background: var(--color-primary); border-radius: var(--radius-pill);
}
.brand-tagline { font-size: var(--text-sm); color: var(--color-ink-soft); letter-spacing: 0.08em; }

.nav-bar { background: var(--color-surface-alt); border-top: var(--border-thin) solid var(--color-line); }
.nav-bar-inner {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  gap: var(--space-2); min-height: 60px; padding-block: var(--space-1);
}
.refresh-chip {
  justify-self: start; display: inline-flex; align-items: center; gap: var(--space-1);
  padding-left: var(--space-1); border-left: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-ink-soft);
}
.refresh-chip .refresh-dot { background: var(--color-accent); box-shadow: none; animation: none; }
.site-nav { grid-column: 2; justify-self: center; }
.nav-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 2px; }
.nav-link {
  display: inline-block; padding: 8px 12px; border-radius: var(--radius-sm);
  border: var(--border-thin) solid transparent;
  font-size: var(--text-sm); font-weight: 600; color: var(--color-ink);
  transition: background-color 140ms ease-out, color 140ms ease-out, border-color 140ms ease-out;
}
.nav-link:hover { background: var(--color-primary-soft); border-color: var(--color-primary); }
.nav-link[aria-current="page"] { background: var(--color-primary); color: var(--color-primary-ink); border-color: var(--color-primary); }
.nav-link.is-hit { background: var(--color-highlight); border-color: var(--color-accent); }

.header-search {
  justify-self: end; display: flex; align-items: center;
  border: var(--border-thin) solid var(--color-line); border-radius: var(--radius-pill);
  background: var(--color-surface); overflow: hidden;
  transition: border-color 140ms ease-out;
}
.header-search:focus-within { border-color: var(--color-focus); }
.search-input {
  border: 0; background: transparent; padding: 9px 14px;
  font-size: var(--text-sm); color: var(--color-ink); width: 210px; min-width: 0;
}
.search-input:focus-visible { outline-offset: -4px; }
.search-input::placeholder { color: var(--color-ink-muted); }
.search-btn {
  border: 0; background: var(--color-accent); color: var(--color-accent-ink);
  padding: 10px 16px; font-family: var(--font-heading); font-weight: 700; font-size: var(--text-sm);
  transition: background-color 140ms ease-out;
}
.search-btn:hover { background: color-mix(in srgb, var(--color-accent) 82%, #000); }

.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 4px; z-index: 220;
  background: color-mix(in srgb, var(--color-contrast-surface) 26%, transparent);
  pointer-events: none;
}
.scroll-progress-bar {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary) 55%, var(--color-accent) 100%);
  transition: width 120ms linear;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
  padding-block: var(--space-8) var(--space-6);
}
.footer-frame {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg); overflow: hidden;
  background: var(--color-surface);
}
.footer-ticks {
  height: 16px; border-bottom: var(--border-thin) solid var(--color-line);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-line) 0,
    var(--color-line) 2px,
    transparent 2px,
    transparent 22px
  );
}
.footer-inner { padding: var(--space-6) var(--space-4) 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: var(--space-4); padding-bottom: var(--space-6);
}
.footer-brand { display: grid; gap: var(--space-2); align-content: start; justify-items: start; }
.footer-brand-mark {
  margin: 0; font-family: var(--font-heading); font-weight: var(--weight-heading);
  font-size: var(--text-2xl); line-height: 1.1; color: var(--color-ink);
}
.footer-tagline { margin: 0; font-size: var(--text-sm); color: var(--color-ink-soft); }
.footer-refresh {
  margin: 0; padding-left: var(--space-1); border-left: var(--border-thin) solid var(--color-accent);
  font-family: var(--font-mono); font-size: var(--text-xs); line-height: 1.7; color: var(--color-ink-muted);
}
.footer-col { display: grid; gap: var(--space-2); align-content: start; }
.footer-col-title {
  margin: 0; font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-ink-muted);
}
.footer-links { display: grid; gap: var(--space-1); }
.footer-links a {
  font-size: var(--text-sm); color: var(--color-ink);
  border-bottom: var(--border-thin) solid transparent; padding-bottom: 2px;
}
.footer-links a:hover { color: var(--color-primary); border-bottom-color: var(--color-focus); }

.footer-legal {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-3); padding-block: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}
.legal-list { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.legal-list a {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-ink-soft);
  border-bottom: var(--border-thin) solid var(--color-line); padding-bottom: 1px;
}
.legal-list a:hover { color: var(--color-primary); border-bottom-color: var(--color-focus); }
.footer-contact { margin: 0; font-size: var(--text-xs); line-height: 1.8; color: var(--color-ink-soft); }
.footer-contact .mono { color: var(--color-ink); }

.footer-meta {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  background: var(--color-contrast-surface); color: var(--color-contrast-ink);
  padding: var(--space-2) var(--space-4);
}
.footer-meta-item {
  margin: 0; font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: 0.04em; color: var(--color-contrast-ink);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1000px) {
  .nav-toggle { display: inline-flex; }
  .nav-bar-inner { grid-template-columns: 1fr auto; gap: var(--space-1); }
  .refresh-chip { display: none; }
  .site-nav {
    grid-column: 1 / -1; justify-self: stretch; display: none;
    border-top: var(--border-thin) solid var(--color-line);
    padding-top: var(--space-1);
  }
  .site-nav[data-open] { display: block; }
  .nav-list { flex-direction: column; justify-content: flex-start; gap: 0; }
  .nav-item + .nav-item { border-top: var(--border-thin) solid var(--color-line); }
  .nav-link { display: block; border: 0; border-radius: 0; padding: 12px 4px; }
  .nav-link:hover { background: var(--color-primary-soft); }
  .header-search { grid-column: 1 / -1; justify-self: stretch; width: 100%; margin-bottom: var(--space-1); }
  .search-input { flex: 1 1 auto; width: auto; }
  .masthead { padding-block: var(--space-3); }
  .brand-mark { font-size: var(--text-2xl); }
  .brand-mark::after { height: 4px; }
}

@media (max-width: 960px) {
  .col-3, .col-4, .col-6, .col-8, .col-9 { grid-column: span 12; }
  .index-rail { position: static; }
  .index-rail a { margin-left: 0; }
}

@media (max-width: 720px) {
  .section { padding-block: var(--space-6); }
  .section--lg { padding-block: var(--space-8); }
  .t-lead { font-size: var(--text-base); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-3); }
  .footer-inner { padding: var(--space-4) var(--space-3) 0; }
  .footer-meta { padding: var(--space-2) var(--space-3); }
  .data-panel { padding: var(--space-3); }
}

@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;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .btn:hover, .panel--interactive:hover { transform: none; }
}