:root {
  --color-surface: #ffffff;
  --color-surface-alt: #f6f6f6;
  --color-surface-deep: #e9e9ea;
  --color-ink: #464b53;
  --color-ink-soft: #6a717b;
  --color-ink-muted: #777e88;
  --color-line: #dedfe0;
  --color-primary: #4e78b1;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e6ecf4;
  --color-accent: #5943bc;
  --color-accent-ink: #ffffff;
  --color-highlight: #e1ddf3;
  --color-focus: #5137c8;
  --color-contrast-surface: #1d222a;
  --color-contrast-ink: #e4e5e7;
  --color-contrast-line: #494d54;
  --color-contrast-accent: #8e7fd1;
  --overlay-scrim: linear-gradient(180deg, rgba(29, 34, 42, 0.35) 0%, rgba(29, 34, 42, 0.72) 55%, rgba(29, 34, 42, 0.92) 100%);
  --font-heading: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 12.2px;
  --text-sm: 14.6px;
  --text-base: 16px;
  --text-lg: 19.2px;
  --text-xl: 23.0px;
  --text-2xl: 27.6px;
  --text-3xl: 33.2px;
  --text-4xl: 39.8px;
  --text-display: clamp(34px, 6.9vw, 88px);
  --text-figure: clamp(28px, 4.9vw, 63px);
  --weight-heading: 656;
  --weight-body: 400;
  --leading-body: 1.79;
  --leading-heading: 1.24;
  --tracking-heading: 0.005em;
  --radius-sm: 18px;
  --radius-md: 22px;
  --radius-lg: 27px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(70, 75, 83, 0.08);
  --shadow-2: 0 18px 44px rgba(70, 75, 83, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1140px;
  --measure: 66ch;
  --gutter: 24px;
  --section-y: 104px;
  --section-y-lg: 146px;
}

/* ============ Reset ============ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { margin: 0; }
h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
[hidden] { display: none !important; }
summary { list-style: none; }
summary::-webkit-details-marker { display: none; }

/* ============ 基础排版 ============ */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  letter-spacing: 0.01em;
  color: var(--color-ink);
  background-color: var(--color-surface);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
p { max-width: var(--measure); }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-accent); }
strong { font-weight: 600; }
small { font-size: var(--text-xs); }

.num,
.figure-num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.num { font-size: inherit; letter-spacing: 0.02em; }
.figure-num {
  font-size: var(--text-figure);
  font-weight: 600;
  line-height: 1;
  color: var(--color-accent);
}
.display-title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}
.measure { max-width: var(--measure); }
.lead { font-size: var(--text-lg); color: var(--color-ink-soft); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-primary);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: var(--border-thin);
  background: currentColor;
  opacity: 0.7;
}
.field-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============ 布局骨架 ============ */
.container {
  width: min(100% - (var(--gutter) * 2), var(--container));
  margin-inline: auto;
}
.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--tight { padding-block: var(--space-6); }
.section--surface { background-color: var(--color-surface); }
.section--alt { background-color: var(--color-surface-alt); }
.section--deep { background-color: var(--color-surface-deep); }
.section--primary-soft { background-color: var(--color-primary-soft); }
.section--highlight { background-color: var(--color-highlight); }
.section--contrast {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--contrast h1,
.section--contrast h2,
.section--contrast h3,
.section--contrast h4 { color: var(--color-contrast-ink); }
.section--contrast a { color: var(--color-contrast-accent); }
.section--contrast .eyebrow { color: var(--color-contrast-accent); }
.section--contrast .section-lead,
.section--contrast .lead {
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, var(--color-contrast-surface));
}
.section--contrast .field-note { color: color-mix(in srgb, var(--color-contrast-ink) 62%, var(--color-contrast-surface)); }

.section-head { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-6); }
.section-title { font-size: var(--text-2xl); }
.section-lead { font-size: var(--text-base); color: var(--color-ink-soft); max-width: var(--measure); }

.grid {
  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-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

.stack { display: flex; flex-direction: column; gap: var(--space-2); }
.stack--loose { gap: var(--space-4); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }

.tick-rule {
  height: 14px;
  border-top: var(--border-thin) solid var(--color-line);
  position: relative;
}
.tick-rule::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: var(--border-thin);
  height: 8px;
  background: var(--color-line);
  box-shadow:
    88px 0 0 var(--color-line),
    156px 0 0 var(--color-line),
    264px 0 0 var(--color-line);
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 12px 22px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.24s ease, background-color 0.24s ease, color 0.24s ease, border-color 0.24s ease;
}
.btn--primary { background-color: var(--color-primary); color: var(--color-primary-ink); }
.btn--primary:hover {
  background-color: color-mix(in srgb, var(--color-primary) 86%, #000);
  color: var(--color-primary-ink);
  transform: translateY(-2px);
}
.btn--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--accent:hover {
  background-color: color-mix(in srgb, var(--color-accent) 86%, #000);
  color: var(--color-accent-ink);
  transform: translateY(-2px);
}
.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-line);
}
.btn--ghost:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ============ 标签 / 状态 ============ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 5px 13px 5px 11px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.tag::before {
  content: "";
  width: 12px;
  height: var(--border-thin);
  background: currentColor;
  opacity: 0.75;
  flex: 0 0 auto;
}
.tag--accent { background-color: var(--color-highlight); color: var(--color-accent); }
.tag--deep { background-color: var(--color-surface-deep); color: var(--color-ink-soft); }
.tag--onDark {
  background-color: transparent;
  color: var(--color-contrast-accent);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-contrast-line);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background-color: var(--color-highlight);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 1.6;
  white-space: nowrap;
}
.status-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex: 0 0 auto;
}
.status-pill--calm { background-color: var(--color-primary-soft); color: var(--color-primary); }
.status-pill--deep {
  background-color: color-mix(in srgb, var(--color-contrast-surface) 88%, #fff);
  color: var(--color-contrast-accent);
}

/* ============ 卡片 / 面板 ============ */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-1);
}
.card--plain {
  background-color: var(--color-surface-alt);
  box-shadow: none;
}
.card--lg { border-radius: var(--radius-lg); padding: var(--space-6); }
.card--sm { border-radius: var(--radius-sm); padding: var(--space-3); }

.panel-dark {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.panel-dark h1, .panel-dark h2, .panel-dark h3, .panel-dark h4 { color: var(--color-contrast-ink); }
.panel-dark a { color: var(--color-contrast-accent); }
.panel-dark .num,
.panel-dark .figure-num { color: var(--color-contrast-accent); }
.panel-dark .field-note { color: color-mix(in srgb, var(--color-contrast-ink) 60%, var(--color-contrast-surface)); }
.panel-dark hr,
.panel-dark .tick-rule { border-color: var(--color-contrast-line); }

/* ============ 折叠内容组 ============ */
.expand-group {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  padding: var(--space-2) var(--space-4);
  transition: box-shadow 0.24s ease;
}
.expand-group[open] {
  box-shadow: inset 4px 0 0 0 var(--color-accent), var(--shadow-1);
}
.expand-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
}
.expand-group > summary::after {
  content: "＋";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
}
.expand-group[open] > summary::after { content: "－"; color: var(--color-accent); }
.expand-group__body {
  padding-block: var(--space-2) var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-soft);
}

/* ============ 数据表 ============ */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  background-color: var(--color-surface);
}
.data-table caption {
  text-align: left;
  padding-bottom: var(--space-2);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-ink-muted);
}
.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  border-bottom: var(--border-thin) solid var(--color-line);
  white-space: nowrap;
}
.data-table td {
  padding: 12px;
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.data-table tbody tr:nth-child(even) { background-color: var(--color-surface-deep); }
.data-table tbody tr[data-row-active] { background-color: var(--color-highlight); }
.data-table td:focus-visible,
.data-table th:focus-visible { outline: 3px solid var(--color-focus); outline-offset: -3px; }
.data-table--dark { background-color: transparent; color: var(--color-contrast-ink); }
.data-table--dark th {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-line);
}
.data-table--dark td {
  color: var(--color-contrast-ink);
  border-bottom-color: var(--color-contrast-line);
}
.data-table--dark tbody tr:nth-child(even) {
  background-color: color-mix(in srgb, var(--color-contrast-surface) 88%, #ffffff);
}
.data-table--dark tbody tr[data-row-active] {
  background-color: color-mix(in srgb, var(--color-contrast-accent) 22%, var(--color-contrast-surface));
}

/* ============ 图片容器 ============ */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--color-surface-deep);
}
.media-frame > img,
.media-frame > svg,
.media-frame > .media-placeholder {
  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--banner { aspect-ratio: 21 / 9; border-radius: var(--radius-lg); }
.media-frame--sm { border-radius: var(--radius-sm); }
.media-frame--scrim::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}
.media-frame__caption {
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 2;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
}
.media-frame__caption .field-note {
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, var(--color-contrast-surface));
}
.media-placeholder {
  position: relative;
  display: block;
  background-image: linear-gradient(135deg, var(--color-primary-soft) 0%, var(--color-highlight) 55%, var(--color-surface-deep) 100%);
}
.media-placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-primary) 20%, transparent) 0 1px,
    transparent 1px 48px
  );
  opacity: 0.6;
}

/* ============ 面包屑 ============ */
.breadcrumb {
  padding-block: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-1); }
.breadcrumb li { display: inline-flex; align-items: center; gap: var(--space-1); }
.breadcrumb li + li::before {
  content: "/";
  color: var(--color-line);
}
.breadcrumb a { color: var(--color-ink-soft); border-bottom: var(--border-thin) solid var(--color-line); }
.breadcrumb a:hover { color: var(--color-primary); border-color: var(--color-primary); }
.breadcrumb [aria-current="page"] { color: var(--color-ink); }

/* ============ 筛选条 ============ */
.filter-bar { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.filter-tag {
  appearance: none;
  padding: 7px 16px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.filter-tag:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-tag.is-active {
  background-color: var(--color-highlight);
  border-color: var(--color-accent);
  color: var(--color-accent);
  font-weight: 600;
}
.filter-status {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ============ 跳转链接 ============ */
.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -60px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: top 0.2s ease;
}
.skip-link:focus { top: var(--space-2); color: var(--color-accent-ink); }

/* ============ 页头 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-image: linear-gradient(180deg, var(--color-primary-soft) 0%, var(--color-surface) 82%);
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.header-inner {
  width: min(100% - (var(--gutter) * 2), var(--container));
  margin-inline: auto;
  padding-block: var(--space-3) var(--space-2);
  display: grid;
  gap: var(--space-2);
}
.masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-ink);
  text-decoration: none;
}
.brand:hover { color: var(--color-ink); }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
}
.brand-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  max-width: none;
}

.nav-toggle {
  display: none;
  justify-self: center;
  align-items: center;
  gap: var(--space-1);
  padding: 10px 18px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--color-primary); background-color: var(--color-primary-soft); }
.nav-toggle-bars { position: relative; display: block; width: 16px; height: 10px; }
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform 0.24s ease, top 0.24s ease, bottom 0.24s ease;
}
.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { top: 4px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { bottom: 4px; transform: rotate(-45deg); }

.site-nav { display: flex; justify-content: center; }
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}
.nav-list > li { display: flex; align-items: center; }
.nav-list > li + li::before {
  content: "";
  flex: 0 0 auto;
  width: var(--border-thin);
  height: 14px;
  margin-inline: var(--space-1);
  background-color: var(--color-line);
}
.nav-list a {
  position: relative;
  display: inline-block;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
  transition: transform 0.24s ease, color 0.24s ease, background-color 0.24s ease;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--color-primary);
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  transition: transform 0.24s ease;
}
.nav-list a:hover {
  color: var(--color-ink);
  background-color: var(--color-primary-soft);
  transform: translateY(-2px);
}
.nav-list a:hover::after { transform: translateX(-50%) scaleX(1); }
.nav-list a[aria-current="page"] {
  color: var(--color-primary);
  background-color: var(--color-highlight);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-primary);
  font-weight: 600;
}
.nav-list a[aria-current="page"]::after { transform: translateX(-50%) scaleX(1); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  pointer-events: none;
  z-index: 2;
}

/* ============ 页脚 ============ */
.site-footer {
  background-color: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-soft);
  padding-block: var(--space-8) var(--space-3);
}
.footer-inner {
  width: min(100% - (var(--gutter) * 2), var(--container));
  margin-inline: auto;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: var(--space-6);
  padding-bottom: var(--space-6);
}
.footer-brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}
.footer-tagline {
  margin-top: 6px;
  max-width: 34ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.footer-lines { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.footer-lines a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-line);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}
.footer-lines a::before {
  content: "";
  width: 12px;
  height: var(--border-thin);
  background-color: var(--color-primary);
}
.footer-lines a:hover {
  background-color: var(--color-primary-soft);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-primary);
  color: var(--color-primary);
}
.footer-contact {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2) var(--space-6);
  padding-block: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}
.footer-contact li { display: flex; flex-direction: column; gap: 2px; }
.footer-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.footer-value { font-size: var(--text-sm); color: var(--color-ink); }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.footer-legal a {
  color: var(--color-ink-soft);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.footer-legal a:hover { color: var(--color-primary); border-color: var(--color-primary); }
.footer-tick {
  display: inline-block;
  width: var(--border-thin);
  height: 12px;
  background-color: var(--color-line);
}
.footer-icp { font-family: var(--font-mono); }
.footer-copy { font-family: var(--font-mono); }

.footer-scales {
  --tick-gap: 1;
  display: flex;
  align-items: flex-end;
  height: 24px;
  margin-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
  overflow: hidden;
}
.footer-scales i {
  display: block;
  width: var(--border-thin);
  height: 6px;
  background-color: var(--color-line);
}
.footer-scales i:nth-child(1) { height: 14px; margin-left: 0; }
.footer-scales i:nth-child(2) { height: 6px; margin-left: calc(36px * var(--tick-gap)); }
.footer-scales i:nth-child(3) { height: 10px; margin-left: calc(88px * var(--tick-gap)); }
.footer-scales i:nth-child(4) { height: 6px; margin-left: calc(22px * var(--tick-gap)); }
.footer-scales i:nth-child(5) { height: 16px; margin-left: calc(64px * var(--tick-gap)); }
.footer-scales i:nth-child(6) { height: 6px; margin-left: calc(30px * var(--tick-gap)); }
.footer-scales i:nth-child(7) { height: 10px; margin-left: calc(96px * var(--tick-gap)); }
.footer-scales i:nth-child(8) { height: 6px; margin-left: calc(44px * var(--tick-gap)); }
.footer-scales i:nth-child(9) { height: 12px; margin-left: calc(70px * var(--tick-gap)); }

/* ============ 滚动显现 ============ */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.32s ease, transform 0.32s ease;
}
.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4 { grid-column: span 3; }
  .col-5, .col-6, .col-7 { grid-column: span 6; }
  .col-8 { grid-column: span 6; }
  .footer-top { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
}

@media (max-width: 900px) {
  :root { --section-y: 72px; --section-y-lg: 96px; }
  .header-inner { padding-block: var(--space-2); }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: block;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.32s ease, opacity 0.28s ease, visibility 0.32s ease;
  }
  .site-nav[data-open] {
    max-height: 460px;
    opacity: 1;
    visibility: visible;
  }
  .nav-list { flex-direction: column; align-items: stretch; padding-top: var(--space-1); }
  .nav-list > li { width: 100%; }
  .nav-list > li + li::before { display: none; }
  .nav-list a { display: block; padding: 13px 16px; }
  .nav-list a::after { left: 16px; transform: translateX(0) scaleX(0); }
  .nav-list a:hover { transform: none; }
  .nav-list a:hover::after,
  .nav-list a[aria-current="page"]::after { transform: translateX(0) scaleX(1); }
  .card--lg { padding: var(--space-4); }
  .footer-contact { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--space-3); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8 { grid-column: span 6; }
  .brand-name { font-size: var(--text-xl); }
  .footer-scales { --tick-gap: 0.55; }
  .data-table { font-size: var(--text-xs); }
  .expand-group { padding-inline: 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;
  }
  .js-reveal [data-reveal] { opacity: 1; transform: none; }
  .nav-list a:hover,
  .btn:hover { transform: none; }
}