:root {
  --color-surface: #eaebeb;
  --color-surface-alt: #e1e3e2;
  --color-surface-deep: #d5d7d7;
  --color-ink: #384341;
  --color-ink-soft: #596966;
  --color-ink-muted: #748683;
  --color-line: #cacdcc;
  --color-primary: #388074;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #d1dcda;
  --color-accent: #b3603c;
  --color-accent-ink: #ffffff;
  --color-highlight: #e0d2cc;
  --color-focus: #a34e29;
  --color-contrast-surface: #101715;
  --color-contrast-ink: #e4e7e6;
  --color-contrast-line: #3f4543;
  --color-contrast-accent: #c06a44;
  --overlay-scrim: linear-gradient(180deg, rgba(16, 23, 21, 0.35) 0%, rgba(16, 23, 21, 0.72) 55%, rgba(16, 23, 21, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 12.2px;
  --text-sm: 15.2px;
  --text-base: 17px;
  --text-lg: 21.2px;
  --text-xl: 26.6px;
  --text-2xl: 33.2px;
  --text-3xl: 41.5px;
  --text-4xl: 51.9px;
  --text-display: clamp(36px, 7.5vw, 96px);
  --text-figure: clamp(30px, 5.4vw, 69px);
  --weight-heading: 678;
  --weight-body: 400;
  --leading-body: 1.76;
  --leading-heading: 1.23;
  --tracking-heading: 0.001em;
  --radius-sm: 4px;
  --radius-md: 5px;
  --radius-lg: 6px;
  --radius-pill: 6px;
  --border-thin: 1px;
  --border-thick: 2px;
  --shadow-1: 0 1px 0 rgba(56, 67, 65, 0.12);
  --shadow-2: 0 2px 0 rgba(56, 67, 65, 0.18);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1100px;
  --measure: 73ch;
  --gutter: 16px;
  --section-y: 89px;
  --section-y-lg: 125px;
}

/* ============ 01 Reset ============ */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: 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);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video, canvas { display: block; max-width: 100%; }
ul, ol { margin: 0; }
figure { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

a { color: var(--color-primary); text-decoration-thickness: var(--border-thin); text-underline-offset: 3px; }
a:hover { color: var(--color-focus); }

:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

::selection { background-color: var(--color-primary-soft); color: var(--color-ink); }

/* ============ 02 中文排版 ============ */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  word-break: break-word;
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5, h6 {
  font-size: var(--text-base);
  letter-spacing: 0.14em;
  color: var(--color-ink-soft);
}

p { margin: 0 0 var(--space-3); word-break: break-word; }
strong { font-weight: var(--weight-heading); }

.num,
.figure-xl,
.header-note,
.site-footer__legal {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.display-xl {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-3);
}

.figure-xl {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}
.figure-xl--accent { color: var(--color-accent); }
.figure-xl--primary { color: var(--color-primary); }
.figure-xl--contrast { color: var(--color-contrast-accent); }

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: var(--border-thick);
  background-color: currentColor;
}

.lede {
  max-width: 62ch;
  font-size: var(--text-lg);
  line-height: 1.62;
  color: var(--color-ink-soft);
}

.prose { max-width: var(--measure); }
.prose p,
.prose li,
.prose blockquote {
  font-family: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "STSong", "SimSun", Georgia, serif;
}
.prose h2 { margin-top: var(--space-6); }
.prose h3 { margin-top: var(--space-4); }
.prose ul { list-style: disc; padding-left: 1.4em; margin-bottom: var(--space-3); }
.prose ol { list-style: decimal; padding-left: 1.5em; margin-bottom: var(--space-3); }
.prose li { margin-bottom: var(--space-1); }
.prose blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-primary-soft);
  border-left: var(--border-thick) solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.prose blockquote p:last-child { margin-bottom: 0; }

.divider {
  margin-block: var(--space-4);
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.speed-band {
  height: 3px;
  margin: 0;
  border: 0;
  background-image: linear-gradient(
    90deg,
    var(--color-primary) 0 33%,
    var(--color-accent) 33% 64%,
    transparent 64% 100%
  );
}

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

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -120px;
  z-index: 200;
  padding: 10px var(--space-3);
  border-radius: var(--radius-sm);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: top 150ms ease;
}
.skip-link:focus { top: var(--space-2); color: var(--color-contrast-ink); }

/* ============ 03 布局 ============ */
.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--tight { padding-block: var(--space-6); }
.section--alt { background-color: var(--color-surface-alt); }
.section--band { background-color: var(--color-surface-deep); }
.section--inverse {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--inverse h1,
.section--inverse h2,
.section--inverse h3,
.section--inverse h4,
.section--inverse h5,
.section--inverse h6 { color: var(--color-contrast-ink); }
.section--inverse p { color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent); }
.section--inverse a { color: var(--color-contrast-accent); }
.section--inverse .stat-label { color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent); }
.section--inverse .figure-xl { color: var(--color-contrast-ink); }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}
.col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: 1 / -1; }

@media (min-width: 768px) {
  .container { padding-inline: var(--space-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; }
}

/* ============ 04 头部 ============ */
.site-header {
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-image: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 120;
  pointer-events: none;
}

.site-header__rail {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-2) var(--gutter) 0;
}
.header-rule {
  flex: 1 1 auto;
  height: 0;
  border-top: var(--border-thin) solid var(--color-line);
}
.header-note {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.masthead {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-3) var(--gutter) var(--space-2);
  text-align: center;
}
.masthead__mark {
  position: absolute;
  left: var(--gutter);
  top: 50%;
  transform: translateY(-50%);
  padding: 7px 9px 7px 11px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-primary);
}
.masthead__block {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.masthead__brand {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: 1.1;
  letter-spacing: 0.1em;
  color: var(--color-ink);
  text-decoration: none;
}
.masthead__brand:hover { color: var(--color-primary); }
.masthead__tagline {
  margin: 6px 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
}
.masthead__side {
  position: absolute;
  right: var(--gutter);
  top: 50%;
  transform: translateY(-50%);
  padding: 6px 2px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.32em;
  color: var(--color-accent);
  border-right: var(--border-thin) solid var(--color-accent);
}

.nav-bar {
  background-color: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.nav-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: 58px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav__link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: background-color 140ms ease, color 140ms ease;
}
.site-nav__link:hover {
  background-color: var(--color-surface-deep);
  color: var(--color-ink);
}
.site-nav__link[aria-current="page"] {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.nav-cta {
  position: absolute;
  right: var(--gutter);
  top: 50%;
  transform: translateY(-50%);
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: background-color 140ms ease;
}
.nav-cta:hover { background-color: var(--color-focus); color: var(--color-accent-ink); }
.nav-cta[aria-current="page"] {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  padding: 14px 0;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.14em;
  color: var(--color-ink);
}
.nav-toggle__lines {
  position: relative;
  display: block;
  width: 22px;
  height: 10px;
  border-top: var(--border-thick) solid var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-ink);
  transition: border-color 140ms ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__lines {
  border-top-color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

@media (max-width: 879px) {
  .masthead { padding-block: var(--space-3) var(--space-2); }
  .masthead__mark { display: none; }
  .masthead__side { display: none; }

  .nav-bar__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
  }
  .nav-toggle {
    display: flex;
    border-bottom: var(--border-thin) solid var(--color-line);
  }
  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: var(--space-2) var(--space-3);
  }
  .site-nav[data-open] { display: flex; }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__link {
    display: block;
    padding: 13px var(--space-2);
    border-radius: 0;
    border-bottom: var(--border-thin) solid var(--color-line);
  }
  .site-nav__link[aria-current="page"] { border-radius: var(--radius-sm); }
  .nav-cta {
    position: static;
    transform: none;
    margin-top: var(--space-3);
    text-align: center;
  }
}

@media (max-width: 520px) {
  .header-rule { display: none; }
  .site-header__rail { justify-content: center; }
}

/* ============ 05 页脚 ============ */
.site-footer {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-8) var(--space-4);
  border-top: var(--border-thick) solid var(--color-primary);
}
.site-footer__inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.site-footer__mast {
  padding-bottom: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}
.site-footer__brand {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  letter-spacing: 0.1em;
  color: var(--color-contrast-ink);
}
.site-footer__line {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}
.site-footer__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-block: var(--space-6);
}
.footer-col__title {
  margin: 0 0 var(--space-2);
  padding-bottom: 6px;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.24em;
  color: var(--color-contrast-accent);
}
.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
}
.footer-col__list a {
  color: var(--color-contrast-ink);
  text-decoration: none;
  padding-bottom: 1px;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 140ms ease, border-color 140ms ease;
}
.footer-col__list a:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}
.footer-col__list--plain {
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
  line-height: 1.6;
}
.footer-contact__label {
  display: inline-block;
  min-width: 3.2em;
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}
.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-1) var(--space-3);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}
.site-footer__legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 60%, transparent);
}

@media (min-width: 720px) {
  .site-footer__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-6);
  }
}

/* ============ 06 通用组件 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px var(--space-3);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms 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) 84%, var(--color-ink)); color: var(--color-primary-ink); }
.btn--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--accent:hover { background-color: var(--color-focus); color: var(--color-accent-ink); }
.btn--ghost { background-color: transparent; color: var(--color-ink); border-color: var(--color-line); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--contrast { background-color: transparent; color: var(--color-contrast-ink); border-color: var(--color-contrast-line); }
.btn--contrast:hover { background-color: var(--color-contrast-ink); color: var(--color-contrast-surface); }
.btn--block { width: 100%; }

.breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: var(--space-1);
  color: var(--color-line);
}
.breadcrumb a { color: var(--color-ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-primary); }

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-sm);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  text-align: left;
}
.data-table caption {
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.02em;
  text-align: left;
  color: var(--color-ink);
}
.data-table th,
.data-table td {
  padding: 12px var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  vertical-align: top;
}
.data-table thead th {
  background-color: var(--color-surface-deep);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-soft);
}
.data-table tbody tr { transition: background-color 140ms ease; }
.data-table tbody tr:hover { background-color: var(--color-highlight); }
.data-table .num { font-family: var(--font-mono); letter-spacing: 0.02em; }

.data-table--contrast { color: var(--color-contrast-ink); }
.data-table--contrast caption { color: var(--color-contrast-ink); }
.data-table--contrast th,
.data-table--contrast td { border-bottom-color: var(--color-contrast-line); }
.data-table--contrast thead th {
  background-color: color-mix(in srgb, var(--color-contrast-ink) 12%, transparent);
  color: var(--color-contrast-ink);
  border-bottom-color: var(--color-contrast-line);
}
.data-table--contrast tbody tr:hover {
  background-color: color-mix(in srgb, var(--color-contrast-ink) 9%, transparent);
}
.data-table--contrast .num { color: var(--color-contrast-accent); }

.segmented { margin-block: var(--space-3); }
.segmented__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.segmented__btn {
  padding: 11px 16px;
  border: var(--border-thin) solid transparent;
  border-bottom: 0;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  transition: background-color 140ms ease, color 140ms ease;
}
.segmented__btn:hover {
  background-color: var(--color-surface-deep);
  color: var(--color-ink);
}
.segmented__btn[aria-selected="true"] {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.segmented__panel { padding-top: var(--space-3); }
.segmented__panel[hidden] { display: none; }

.figure-frame {
  padding: 6px;
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
}
.figure-frame--contrast {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
}
.figure-frame__media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
  aspect-ratio: 16 / 10;
  background-color: var(--color-surface-deep);
  background-image:
    linear-gradient(var(--color-line) var(--border-thin), transparent var(--border-thin)),
    linear-gradient(90deg, var(--color-line) var(--border-thin), transparent var(--border-thin));
  background-size: 28px 28px, 28px 28px;
}
.figure-frame__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure-frame__scrim {
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
}
.figure-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--space-3);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.5;
}
.figure-frame__caption .num { color: var(--color-contrast-accent); }
.figure-frame--wide .figure-frame__media { aspect-ratio: 21 / 9; }
.figure-frame--tall .figure-frame__media { aspect-ratio: 3 / 4; }

.vertical-tag {
  display: inline-block;
  padding: 10px 3px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.3em;
  color: var(--color-ink-muted);
  border-right: var(--border-thin) solid var(--color-line);
}
.vertical-tag--accent { color: var(--color-accent); border-right-color: var(--color-accent); }
.vertical-tag--primary { color: var(--color-primary); border-right-color: var(--color-primary); }

.state-chip {
  display: inline-block;
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  white-space: nowrap;
}
.state-chip--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.state-chip--live { background-color: var(--color-primary); color: var(--color-primary-ink); }
.state-chip--quiet {
  background-color: transparent;
  color: var(--color-ink-muted);
  border: var(--border-thin) solid var(--color-line);
}

.panel {
  padding: var(--space-4);
  background-color: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
}
.panel--deep { background-color: var(--color-surface-deep); }
.panel--inverse {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-line);
}
.panel--inverse h2,
.panel--inverse h3,
.panel--inverse h4 { color: var(--color-contrast-ink); }
.panel--inverse .stat-label { color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent); }

/* ============ 07 显现动效 ============ */
.reveal {
  opacity: 0;
  transform: translate3d(0, 10px, 0);
  transition: opacity 420ms cubic-bezier(0.2, 0.6, 0.2, 1),
              transform 420ms cubic-bezier(0.2, 0.6, 0.2, 1);
}
.reveal[data-revealed] {
  opacity: 1;
  transform: none;
}

@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;
  }
  .reveal { opacity: 1; transform: none; }
  .scroll-progress { display: none; }
}