:root {
  --color-surface: #fdfdfd;
  --color-surface-alt: #f4f4f4;
  --color-surface-deep: #e7e8e9;
  --color-ink: #464b53;
  --color-ink-soft: #6b717b;
  --color-ink-muted: #787e87;
  --color-line: #dcddde;
  --color-primary: #3070cf;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e0e9f7;
  --color-accent: #247d9d;
  --color-accent-ink: #ffffff;
  --color-highlight: #d6e6ec;
  --color-focus: #197a9e;
  --color-contrast-surface: #151c25;
  --color-contrast-ink: #e4e5e7;
  --color-contrast-line: #434850;
  --color-contrast-accent: #30a4cf;
  --overlay-scrim: linear-gradient(180deg, rgba(21, 28, 37, 0.35) 0%, rgba(21, 28, 37, 0.72) 55%, rgba(21, 28, 37, 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: 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(36px, 7.3vw, 94px);
  --text-figure: clamp(30px, 5.3vw, 68px);
  --weight-heading: 753;
  --weight-body: 400;
  --leading-body: 1.68;
  --leading-heading: 1.28;
  --tracking-heading: 0.001em;
  --radius-sm: 0px;
  --radius-md: 1px;
  --radius-lg: 2px;
  --radius-pill: 2px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1340px;
  --measure: 68ch;
  --gutter: 24px;
  --section-y: 88px;
  --section-y-lg: 123px;
}

/* =========================================================
   E星赛场 · 共享样式 /assets/site.css
   ========================================================= */

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

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

body {
  margin: 0;
  background-color: var(--color-surface);
  background-image: radial-gradient(circle at 50% 50%, var(--color-line) 1px, transparent 1.4px);
  background-size: 28px 28px;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 140ms ease, border-color 140ms ease, background-color 140ms ease;
}

a:hover { text-decoration: underline; text-underline-offset: 3px; }

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

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

h1, h2, h3, h4, h5 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-wrap: balance;
}

p { margin: 0; }

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

/* ---------- 布局容器与栅格 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.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-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

/* ---------- 区块 ---------- */
.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background-color: var(--color-surface-alt); }

.section--deep {
  background-color: var(--color-contrast-surface);
  background-image: radial-gradient(circle at 50% 50%, var(--color-contrast-line) 1px, transparent 1.4px);
  background-size: 28px 28px;
  color: var(--color-contrast-ink);
}

.section--deep h1,
.section--deep h2,
.section--deep h3,
.section--deep h4 { color: var(--color-contrast-ink); }

.section--deep p { color: var(--color-contrast-ink); }

.section--deep a { color: var(--color-contrast-accent); }

.section--deep :focus-visible,
.site-footer :focus-visible { outline-color: var(--color-contrast-accent); }

/* ---------- 刻度分隔 ---------- */
.tick-rule {
  height: 10px;
  background-color: transparent;
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 1px, transparent 1px 14px);
  background-repeat: repeat-x;
  border-bottom: 1px dotted var(--color-line);
}

.section--deep .tick-rule {
  background-image: repeating-linear-gradient(90deg, var(--color-contrast-line) 0 1px, transparent 1px 14px);
  border-bottom-color: var(--color-contrast-line);
}

.coord-rule {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-2);
  border-top: 1px dotted var(--color-line);
  border-bottom: 1px dotted var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 标注层 ---------- */
.eyebrow,
.mono-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--color-ink-muted);
}

.section--deep .eyebrow,
.section--deep .mono-label { color: var(--color-contrast-line); }

.big-index {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

.section--deep .big-index { color: var(--color-contrast-accent); }

.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  margin-bottom: var(--space-6);
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

.section--deep .section-head__index { color: var(--color-contrast-accent); }

.section-head__body { min-width: 0; }

.section-head__title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.section-head__note {
  max-width: var(--measure);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.section--deep .section-head__note { color: var(--color-contrast-line); }

/* ---------- 正文与数据 ---------- */
.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.prose > * + * { margin-top: var(--space-2); }

.prose ul,
.prose ol {
  list-style: disc;
  padding-left: 1.3em;
  margin-top: var(--space-2);
}

.prose ol { list-style: decimal; }

.prose li + li { margin-top: var(--space-1); }

.prose strong { font-weight: 700; color: var(--color-ink); }

.section--deep .prose { color: var(--color-contrast-ink); }
.section--deep .prose strong { color: var(--color-contrast-ink); }

.lead {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--color-ink-soft);
}

.section--deep .lead { color: var(--color-contrast-ink); }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  background-color: var(--color-surface-deep);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  line-height: 1.4;
}

.tag--accent {
  background-color: var(--color-highlight);
  color: var(--color-accent);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  border-spacing: 0;
  font-size: var(--text-sm);
}

.data-table th {
  padding: 10px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  border-bottom: 1px dotted var(--color-line);
  white-space: nowrap;
}

.data-table td {
  padding: 12px;
  border-bottom: 1px dotted var(--color-line);
  vertical-align: top;
}

.data-table tbody tr:nth-child(even) { background-color: var(--color-surface-alt); }

.data-table tbody tr:hover { background-color: var(--color-primary-soft); }

.data-table tbody tr:hover td:first-child { color: var(--color-primary); }

.section--deep .data-table th { color: var(--color-contrast-line); border-bottom-color: var(--color-contrast-line); }
.section--deep .data-table td { border-bottom-color: var(--color-contrast-line); color: var(--color-contrast-ink); }
.section--deep .data-table tbody tr:nth-child(even) { background-color: rgba(67, 72, 80, 0.28); }

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumbs li + li::before {
  content: "／";
  color: var(--color-line);
}

.breadcrumbs a { color: var(--color-ink-muted); }

.breadcrumbs a:hover { color: var(--color-primary); text-decoration: none; }

.breadcrumbs [aria-current="page"] { color: var(--color-primary); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 9px 14px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn:hover { text-decoration: none; }

.btn--primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.btn--primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.btn--ghost {
  background-color: transparent;
  border-color: var(--color-line);
  color: var(--color-ink);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------- 图片容器 ---------- */
.figure-frame {
  display: block;
  margin: 0;
  border: var(--border-thin) dotted var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-contrast-surface);
}

.figure-frame__plot {
  position: relative;
  aspect-ratio: 16 / 9;
  background-color: var(--color-contrast-surface);
  overflow: hidden;
}

.figure-frame__media {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.5) contrast(1.06) brightness(0.96);
}

.figure-frame__tint {
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
  pointer-events: none;
}

.figure-frame__caption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  padding: 10px 12px;
  background-color: var(--color-surface-alt);
  border-top: 1px dotted var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.figure-frame__code { color: var(--color-accent); }

.figure-frame--wide .figure-frame__plot { aspect-ratio: 21 / 9; }
.figure-frame--tall .figure-frame__plot { aspect-ratio: 4 / 5; }
.figure-frame--square .figure-frame__plot { aspect-ratio: 1 / 1; }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--gutter);
  z-index: 200;
  padding: 10px 16px;
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  border-radius: var(--radius-md);
  transition: top 140ms ease;
}

.skip-link:focus {
  top: var(--space-2);
  text-decoration: none;
}

/* =========================================================
   头部命令栏
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.site-header__rule {
  height: 8px;
  background-color: var(--color-surface-alt);
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 1px, transparent 1px 12px);
  background-repeat: repeat-x;
  background-position: left bottom;
  border-bottom: 1px dotted var(--color-line);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  min-height: 66px;
  padding-block: 10px;
  position: relative;
}

.site-header[data-condensed] .site-header__inner {
  min-height: 54px;
  padding-block: 6px;
}

.site-header[data-condensed] .brand__line { display: none; }

/* 品牌 */
.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-ink);
}

.brand__link:hover { text-decoration: none; }

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 7px;
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
}

.brand__text { display: flex; flex-direction: column; min-width: 0; }

.brand__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.03em;
  line-height: 1.1;
  color: var(--color-ink);
}

.brand__line {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  line-height: 1.4;
  color: var(--color-ink-muted);
}

.brand__coord {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* 命令栏导航 */
.cmdnav {
  margin-left: auto;
  min-width: 0;
}

.cmdnav__list {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
}

.cmdnav__item { position: relative; }

.cmdnav__item + .cmdnav__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 14px;
  border-left: 1px dotted var(--color-line);
}

.cmdnav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 12px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  white-space: nowrap;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.cmdnav__link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  text-decoration: none;
}

.cmdnav__link[aria-current="page"] {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}

.cmdnav__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.cmdnav__link[aria-current="page"] .cmdnav__index { color: var(--color-primary); }

/* 右侧工具区 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: var(--space-2);
}

.status-lamp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.status-lamp__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-contrast-accent);
  animation: lamp-breathe 1.2s ease-in-out infinite;
}

@keyframes lamp-breathe {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.34; }
}

.header-cta { flex: none; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink);
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease;
}

.nav-toggle:hover { border-color: var(--color-primary); color: var(--color-primary); }

.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 15px;
}

.nav-toggle__bars span {
  display: block;
  height: 1px;
  background-color: currentColor;
}

.nav-toggle__label { line-height: 1; }

/* 滚动进度 */
.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background-color: transparent;
  pointer-events: none;
}

.scroll-meter__bar {
  display: block;
  width: 100%;
  height: 100%;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 100ms linear;
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  margin-top: var(--section-y);
  background-color: var(--color-contrast-surface);
  background-image: radial-gradient(circle at 50% 50%, var(--color-contrast-line) 1px, transparent 1.4px);
  background-size: 28px 28px;
  color: var(--color-contrast-ink);
  border-top: 1px dotted var(--color-contrast-line);
}

.site-footer .mono-label { color: var(--color-contrast-line); }

.footer-tier {
  padding-block: var(--space-6);
  border-bottom: 1px dotted var(--color-contrast-line);
}

.footer-tier--low {
  border-bottom: 0;
  padding-block: var(--space-4);
}

.footer-tier--upper {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(0, 2.4fr);
  gap: var(--space-6);
  align-items: start;
}

.footer-brand__name {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  letter-spacing: 0.03em;
  line-height: 1.2;
  color: var(--color-contrast-ink);
}

.footer-brand__line {
  margin-top: 6px;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
}

.footer-brand__coord {
  margin-top: var(--space-2);
  color: var(--color-contrast-line);
}

.footer-index {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.footer-index__title {
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px dotted var(--color-contrast-line);
  color: var(--color-contrast-accent);
}

.footer-index__list li + li { margin-top: 8px; }

.footer-index__list a {
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  border-bottom: 1px dotted transparent;
}

.footer-index__list a:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
  text-decoration: none;
}

.footer-tier--mid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  background-color: rgba(67, 72, 80, 0.16);
}

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

.footer-meta__label {
  margin-bottom: 10px;
  color: var(--color-contrast-accent);
}

.footer-meta p {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  line-height: 1.7;
}

.footer-tier--low {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background-color: var(--color-contrast-surface);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-line);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.footer-legal li { display: inline-flex; align-items: center; gap: var(--space-2); }

.footer-legal li + li::before {
  content: "";
  width: 1px;
  height: 11px;
  border-left: 1px dotted var(--color-contrast-line);
}

.footer-legal a { color: var(--color-contrast-ink); }
.footer-legal a:hover { color: var(--color-contrast-accent); text-decoration: none; }

.footer-legal__icp { color: var(--color-contrast-line); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1180px) {
  .brand__coord { display: none; }
  .cmdnav__link { padding: 8px 9px; }
}

@media (max-width: 1060px) {
  .status-lamp__text { display: none; }
}

@media (max-width: 960px) {
  .site-header__inner { align-items: flex-start; }

  .brand { order: 1; }
  .header-tools { order: 2; margin-left: auto; }

  .nav-toggle { display: inline-flex; }

  .cmdnav {
    order: 3;
    flex-basis: 100%;
    margin-left: 0;
    display: none;
    padding-bottom: var(--space-1);
  }

  .cmdnav[data-open] { display: block; }

  .cmdnav__list {
    flex-direction: column;
    align-items: stretch;
    border-top: 1px dotted var(--color-line);
  }

  .cmdnav__item + .cmdnav__item::before { display: none; }

  .cmdnav__link {
    justify-content: flex-start;
    padding: 12px 6px;
    border: 0;
    border-bottom: 1px dotted var(--color-line);
    border-radius: var(--radius-sm);
    font-size: var(--text-base);
  }

  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9 { grid-column: span 6; }

  .section-head { grid-template-columns: minmax(0, 1fr); gap: var(--space-2); }

  .footer-tier--upper { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
  .footer-index { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-tier--mid { grid-template-columns: minmax(0, 1fr); }
  .footer-tier--low { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  :root { --gutter: 16px; }

  .brand__line { display: none; }
  .header-cta { display: none; }
  .brand__name { font-size: var(--text-base); }
  .footer-index { grid-template-columns: minmax(0, 1fr); }
  .figure-frame--wide .figure-frame__plot { aspect-ratio: 16 / 9; }
}

/* =========================================================
   动效降级
   ========================================================= */
@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;
  }

  .status-lamp__dot { animation: none; opacity: 1; }
}