:root {
  --color-surface: #fdfdfd;
  --color-surface-alt: #f3f3f3;
  --color-surface-deep: #e5e5e5;
  --color-ink: #383239;
  --color-ink-soft: #675e69;
  --color-ink-muted: #847a85;
  --color-line: #dad8da;
  --color-primary: #c324d6;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #f5dff8;
  --color-accent: #c422d8;
  --color-accent-ink: #ffffff;
  --color-highlight: #f3d6f6;
  --color-focus: #c114d6;
  --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;
  --weight-heading: 778;
  --weight-body: 400;
  --leading-body: 1.86;
  --leading-heading: 1.29;
  --tracking-heading: 0.003em;
  --radius-sm: 3px;
  --radius-md: 4px;
  --radius-lg: 5px;
  --radius-pill: 5px;
  --border-thin: 2px;
  --border-thick: 2px;
  --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: 1020px;
  --measure: 59ch;
  --gutter: 24px;
  --section-y: 75px;
  --section-y-lg: 105px;
}

/* ==========================================================================
   168体育站 · 共享样式表 /assets/site.css
   高对比无障碍 · 单栏清晰结构 · 内嵌边框分隔
   ========================================================================== */

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

html {
  -webkit-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);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

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 { margin: 0; }

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

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

a {
  color: var(--color-primary);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

a:hover { color: var(--color-accent); }

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

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

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

.skip-link {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 200;
  padding: 12px 20px;
  background-color: var(--color-ink);
  color: var(--color-surface);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  border: var(--border-thick) solid var(--color-focus);
  border-radius: var(--radius-sm);
  transform: translateY(calc(-100% - var(--space-6)));
  transition: transform 140ms ease;
}

.skip-link:focus { transform: translateY(0); color: var(--color-surface); }

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

#main-content { display: block; }

.measure { max-width: var(--measure); }

.section { padding-block: var(--section-y); }
.section-lg { padding-block: var(--section-y-lg); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-3);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-4);
  border-bottom: var(--border-thick) solid var(--color-ink);
}

.section-head > h2,
.section-head > h3 { font-size: var(--text-2xl); }

.section-kicker {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-primary);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 3px;
  background-color: var(--color-primary);
}

.lede {
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- 正文区块 ---------- */
.prose {
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: 1.72;
  color: var(--color-ink);
}

.prose > * + * { margin-top: var(--space-3); }
.prose h2 { font-size: var(--text-2xl); }
.prose h3 { font-size: var(--text-xl); }

.prose li {
  padding-left: var(--space-3);
  border-left: 4px solid var(--color-line);
  margin-top: var(--space-2);
}

.prose li:first-child { margin-top: 0; }

/* ---------- 强调机制：竖线与色条 ---------- */
.rail {
  padding-left: var(--space-3);
  border-left: 6px solid var(--color-primary);
}

.rail-ink { border-left-color: var(--color-ink); }

.rail-note {
  max-width: var(--measure);
  padding: var(--space-3);
  border-left: 6px solid var(--color-ink);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background-color: var(--color-surface-deep);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.75;
}

.highlight-block {
  padding: var(--space-3);
  background-color: var(--color-highlight);
  border-left: 6px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-ink);
}

/* ---------- 内嵌框体 ---------- */
.frame {
  padding: var(--space-3);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
}

.frame-alt { background-color: var(--color-surface-alt); }
.frame-deep { background-color: var(--color-surface-deep); }

.frame-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.frame-head h3,
.frame-head h2 { font-size: var(--text-lg); }

.frame-meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

/* ---------- 数据单元 ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2) 0 var(--space-2) var(--space-2);
  border-left: 5px solid var(--color-primary);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
}

.stat-change {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent);
}

/* ---------- 网格 ---------- */
.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-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; }

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-wide { aspect-ratio: 21 / 9; }
.media-tall { aspect-ratio: 3 / 4; }
.media-narrow { aspect-ratio: 4 / 5; }
.media-square { aspect-ratio: 1 / 1; }

.media-caption {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-left: var(--space-4);
  border-left: var(--border-thick) solid var(--color-line);
}

.timeline-item { position: relative; }

.timeline-item::before {
  content: "";
  position: absolute;
  top: 9px;
  left: calc(-1 * var(--space-4) - 5px);
  width: 8px;
  height: 8px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

.timeline-mark {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
}

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px 20px;
  background-color: var(--color-surface);
  color: var(--color-ink);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

.btn:hover {
  background-color: var(--color-ink);
  color: var(--color-surface);
}

.btn-sm { padding: 9px 14px; }

.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-outline {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  margin-block: var(--space-6) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
}

.breadcrumbs li { display: flex; align-items: center; gap: var(--space-1); }

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

.breadcrumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.breadcrumbs a:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-primary);
}

.breadcrumbs [aria-current="page"] {
  color: var(--color-ink);
  font-weight: 700;
  border-bottom-color: var(--color-primary);
}

/* ---------- 章节锚点链 ---------- */
[data-section-link] {
  display: block;
  padding: 8px 12px;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  text-decoration: none;
  border-left: 5px solid var(--color-line);
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

[data-section-link]:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  border-left-color: var(--color-primary);
}

[data-section-link][aria-current] {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  font-weight: 700;
  border-left-color: var(--color-primary);
}

/* ==========================================================================
   头部
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  color: var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-ink);
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.site-header[data-transparent="true"] {
  background-color: var(--color-ink);
  color: var(--color-surface);
  border-bottom-color: var(--color-ink);
}

.header-inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-2) var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: inherit;
  text-decoration: none;
}

.brand:hover { color: inherit; }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 48px;
  padding-inline: 8px;
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.1;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  line-height: 1.2;
  color: var(--color-ink-soft);
}

.site-header[data-transparent="true"] .brand-sub {
  color: color-mix(in srgb, var(--color-surface) 78%, transparent);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
  padding: 10px 14px;
  background-color: var(--color-surface);
  color: var(--color-ink);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

.nav-toggle:hover {
  background-color: var(--color-ink);
  color: var(--color-surface);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background-color: currentColor;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: currentColor;
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

/* 主导航 */
.site-nav {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
}

.nav-list > li { display: flex; }

.nav-list a {
  display: inline-block;
  padding: 10px 12px;
  color: inherit;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease;
}

.nav-list a:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  border-color: var(--color-primary);
}

.nav-list a[aria-current="page"] {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-ink);
  box-shadow: inset 5px 0 0 0 var(--color-primary);
}

.site-header[data-transparent="true"] .nav-list a:hover {
  background-color: color-mix(in srgb, var(--color-surface) 18%, transparent);
  color: var(--color-surface);
  border-color: color-mix(in srgb, var(--color-surface) 55%, transparent);
}

.site-header[data-transparent="true"] .nav-list a[aria-current="page"] {
  background-color: color-mix(in srgb, var(--color-surface) 20%, transparent);
  border-color: var(--color-surface);
  color: var(--color-surface);
  box-shadow: inset 5px 0 0 0 var(--color-surface);
}

.nav-utility {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-line);
}

.nav-utility-label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.site-header[data-transparent="true"] .nav-utility {
  border-left-color: color-mix(in srgb, var(--color-surface) 40%, transparent);
}

.site-header[data-transparent="true"] .nav-utility-label {
  color: color-mix(in srgb, var(--color-surface) 80%, transparent);
}

.site-header[data-transparent="true"] .btn-outline {
  border-color: var(--color-surface);
  color: var(--color-surface);
  background-color: transparent;
}

.site-header[data-transparent="true"] .btn-outline:hover {
  background-color: var(--color-surface);
  color: var(--color-ink);
}

.site-header[data-transparent="true"] .nav-toggle {
  background-color: transparent;
  border-color: var(--color-surface);
  color: var(--color-surface);
}

.site-header[data-transparent="true"] .nav-toggle:hover {
  background-color: var(--color-surface);
  color: var(--color-ink);
}

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  pointer-events: none;
}

.scroll-progress::after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background-color: var(--color-primary);
  transform: scaleX(var(--progress, 0));
  transform-origin: left center;
  transition: transform 90ms linear;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  margin-top: var(--section-y-lg);
  background-color: var(--color-surface);
  color: var(--color-ink);
  border-top: var(--border-thick) solid var(--color-ink);
}

.footer-scale {
  height: 18px;
  background-image: repeating-linear-gradient(
    to right,
    var(--color-line) 0,
    var(--color-line) 2px,
    transparent 2px,
    transparent 16px
  );
  background-repeat: no-repeat;
  background-size: 100% 9px;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.footer-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-8) var(--gutter) var(--space-6);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: var(--space-6) var(--space-4);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  min-width: 0;
}

.footer-note {
  max-width: 36ch;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.footer-note-quiet {
  padding-left: var(--space-2);
  border-left: 5px solid var(--color-primary);
  color: var(--color-ink);
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
}

.footer-title {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.12em;
  color: var(--color-ink);
}

.footer-title::before {
  content: "";
  width: 5px;
  height: 15px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-col a {
  display: block;
  margin-left: -10px;
  padding: 7px 10px;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  text-decoration: none;
  border-left: 5px solid transparent;
  border-radius: var(--radius-sm);
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

.footer-col a:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  border-left-color: var(--color-primary);
}

.footer-col .footer-contact { gap: var(--space-2); }

.footer-contact li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  padding-left: var(--space-2);
  border-left: 5px solid var(--color-primary);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-soft);
}

.contact-value {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.footer-base {
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-3) var(--gutter) var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    flex: 1 0 100%;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--space-3);
    padding-top: var(--space-3);
    border-top: var(--border-thin) solid var(--color-line);
  }

  .site-nav[data-open="true"] { display: flex; }

  .site-header[data-transparent="true"] .site-nav {
    border-top-color: color-mix(in srgb, var(--color-surface) 40%, transparent);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list > li { display: block; }

  .nav-list a {
    padding: 14px 12px;
    font-size: var(--text-base);
    border: 0;
    border-bottom: var(--border-thin) solid var(--color-line);
    border-radius: 0;
  }

  .site-header[data-transparent="true"] .nav-list a {
    border-bottom-color: color-mix(in srgb, var(--color-surface) 35%, transparent);
  }

  .nav-utility {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    padding-left: 0;
    padding-top: var(--space-3);
    border-left: 0;
    border-top: var(--border-thin) solid var(--color-line);
  }

  .site-header[data-transparent="true"] .nav-utility {
    border-top-color: color-mix(in srgb, var(--color-surface) 40%, transparent);
  }

  .nav-utility .btn { width: 100%; }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6) var(--space-4);
  }

  .col-3,
  .col-4,
  .col-5 { grid-column: span 6; }

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

@media (max-width: 640px) {
  .section { padding-block: var(--space-6); }
  .section-lg { padding-block: var(--space-8); }

  .grid-12 > * { grid-column: span 12; }

  .footer-inner {
    grid-template-columns: 1fr;
    padding-top: var(--space-6);
  }

  .footer-note { max-width: none; }

  .footer-base {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }

  .brand-mark {
    min-width: 42px;
    height: 42px;
    font-size: var(--text-base);
  }

  .brand-name { font-size: var(--text-base); }

  .stat-value { font-size: var(--text-2xl); }
}

@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;
  }

  .scroll-progress::after { transition: none; }
  .skip-link { transition: none; }
}