/* ============================================================
   完美体育 | Perfect Sports
   Site Kit 共享样式 | /assets/site.css
   Fingerprint: d647dfab385ca8b2
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  --color-primary: #0A1F44;
  --color-primary-deep: #071533;
  --color-secondary: #00E676;
  --color-accent: #FFC107;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F5F7FA;
  --color-text: #1A1A1A;
  --color-text-muted: #5C6B7A;
  --color-border: #E1E8ED;
  --color-glass: rgba(255, 255, 255, 0.72);

  --font-display: Impact, "Arial Black", "Noto Sans SC", sans-serif;
  --font-body: "Roboto", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: Consolas, "Courier New", monospace;

  --container-width: 1200px;
  --container-pad: 24px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  --radius: 8px;
  --radius-lg: 16px;

  --transition-fast: 0.2s ease;
  --transition: 0.3s ease;
}

/* ---------- 2. Reset 与基础元素 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background: var(--color-surface);
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: 48px; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }

p { margin-bottom: var(--space-3); }
ul, ol { margin-bottom: var(--space-3); padding-left: var(--space-4); }
strong { font-weight: 700; }

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

blockquote {
  border-left: 3px solid var(--color-secondary);
  padding-left: var(--space-3);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-5) 0;
}

#main-content {
  display: block;
  min-height: 55vh;
}

/* ---------- 3. 焦点与动效偏好 ---------- */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ---------- 4. 布局与章节面板 ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.container--narrow {
  max-width: 820px;
}

.panel {
  position: relative;
  padding: var(--space-7) 0;
}

.panel--alt {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.panel--dark {
  background:
    repeating-linear-gradient(
      -35deg,
      transparent 0 22px,
      rgba(255, 255, 255, 0.02) 22px 23px
    ),
    var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  overflow: hidden;
}

.panel--dark::before {
  content: "";
  position: absolute;
  right: -80px;
  top: 18%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 2px solid rgba(0, 230, 118, 0.14);
  transform: rotate(35deg);
  pointer-events: none;
}

.panel--dark .section-head__title {
  color: #fff;
}

.panel--dark .section-head__index {
  background: rgba(0, 230, 118, 0.15);
  color: var(--color-secondary);
}

/* ---------- 5. 章节标题与导读 ---------- */
.section-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-secondary);
  background: var(--color-primary-deep);
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}

.section-head__title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 900;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.editors-note {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-muted);
  border-left: 3px solid var(--color-secondary);
  padding-left: var(--space-3);
  margin: var(--space-4) 0;
}

/* ---------- 6. 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 28px;
  border-radius: 999px;
  border: 2px solid transparent;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn--primary {
  background: var(--color-secondary);
  color: var(--color-primary-deep);
}

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

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

.btn--ghost:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--light {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn--light:hover {
  background: var(--color-secondary);
  color: var(--color-primary-deep);
  border-color: var(--color-secondary);
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.tag--green {
  background: rgba(0, 230, 118, 0.1);
  color: #008b47;
  border-color: rgba(0, 230, 118, 0.35);
}

.tag--gold {
  background: rgba(255, 193, 7, 0.1);
  color: #8a6d00;
  border-color: rgba(255, 193, 7, 0.35);
}

.tag--dark {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.8);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ---------- 7. 跳转链接与滚动进度 ---------- */
.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 2000;
  padding: var(--space-2) var(--space-4);
  background: var(--color-secondary);
  color: var(--color-primary-deep);
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--transition-fast);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: 0;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
  z-index: 3000;
  pointer-events: none;
  transition: width 0.08s linear;
}

/* ---------- 8. 页头与刊头 ---------- */
.site-header {
  position: relative;
  z-index: 100;
  background:
    repeating-linear-gradient(
      -35deg,
      transparent 0 20px,
      rgba(255, 255, 255, 0.02) 20px 21px
    ),
    var(--color-primary-deep);
  border-bottom: 3px solid var(--color-secondary);
}

.masthead-wrap {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-4) var(--container-pad) var(--space-3);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

.masthead-index {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-secondary);
  background: rgba(0, 230, 118, 0.08);
  border: 1px solid rgba(0, 230, 118, 0.3);
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}

.brand {
  justify-self: center;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: #fff;
  transition: color var(--transition-fast);
}

.brand:hover {
  color: var(--color-secondary);
}

.brand__name {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.06em;
  color: inherit;
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.42em;
  color: var(--color-secondary);
  margin-top: var(--space-1);
  text-transform: uppercase;
}

.masthead-badge {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  padding: 4px 14px;
  background: rgba(255, 193, 7, 0.08);
  white-space: nowrap;
}

/* ---------- 9. 主导航 ---------- */
.site-nav {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(10, 31, 68, 0.92);
}

.nav-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  list-style: none;
  display: flex;
  justify-content: center;
  gap: var(--space-1);
  counter-reset: navIndex;
}

.nav-item {
  counter-increment: navIndex;
}

.nav-link {
  position: relative;
  display: block;
  padding: var(--space-3) var(--space-3) calc(var(--space-3) - 2px);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link::before {
  content: "0" counter(navIndex) "/";
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-secondary);
  margin-right: 6px;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: var(--space-3);
  right: 100%;
  bottom: 0;
  height: 3px;
  background: var(--color-secondary);
  transition: right var(--transition);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after {
  right: var(--space-3);
}

.nav-link[aria-current="page"] {
  color: #fff;
  background: rgba(0, 230, 118, 0.08);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background: var(--color-secondary);
  color: var(--color-primary-deep);
  border: none;
  border-radius: 999px;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

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

.nav-toggle__bar {
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ---------- 10. 页脚 ---------- */
.site-footer {
  position: relative;
  background:
    repeating-linear-gradient(
      -35deg,
      transparent 0 22px,
      rgba(255, 255, 255, 0.015) 22px 23px
    ),
    var(--color-primary-deep);
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  border-top: 3px solid var(--color-secondary);
}

.site-footer__main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-6) var(--container-pad) var(--space-5);
  display: grid;
  grid-template-columns: 1.2fr 1.4fr 1fr;
  gap: var(--space-6);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 900;
  color: #fff;
  line-height: 1;
  letter-spacing: 0.04em;
}

.footer-brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.42em;
  color: var(--color-secondary);
  margin-top: var(--space-2);
  text-transform: uppercase;
}

.footer-brand__desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: var(--space-3);
  max-width: 240px;
  line-height: 1.6;
}

.footer-cert {
  display: inline-block;
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  padding: 4px 14px;
  background: rgba(255, 193, 7, 0.08);
}

.footer-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
}

.footer-col__list {
  list-style: none;
  padding-left: 0;
}

.footer-col__list li {
  margin-bottom: var(--space-2);
}

.footer-col__list a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  text-underline-offset: 3px;
}

.footer-col__list a:hover {
  color: var(--color-secondary);
  padding-left: var(--space-1);
}

.footer-col--contact {
  font-size: 13px;
}

.footer-col--contact p {
  margin-bottom: var(--space-2);
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
}

.footer-col__address {
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
}

.site-footer__bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-4) var(--container-pad);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- 11. 通用卡片与数据组件 ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: 0 10px 30px rgba(10, 31, 68, 0.1);
  transform: translateY(-3px);
}

.glass-card {
  background: var(--color-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.data-number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.data-number--green {
  color: var(--color-secondary);
}

.data-number--light {
  color: #fff;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.2);
  vertical-align: middle;
}

.status-dot--gold {
  background: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 193, 7, 0.2);
}

/* ---------- 12. 目录组件 ---------- */
.toc {
  border-left: 3px solid var(--color-secondary);
  padding-left: var(--space-4);
}

.toc__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.toc__list {
  list-style: none;
  padding-left: 0;
}

.toc__item {
  margin-bottom: var(--space-2);
}

.toc__link {
  display: inline-flex;
  gap: var(--space-2);
  align-items: baseline;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 15px;
  transition: color var(--transition-fast);
}

.toc__link:hover {
  color: var(--color-secondary);
}

.toc__index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-secondary);
}

/* ---------- 13. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.breadcrumb__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding-left: 0;
}

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

.breadcrumb__link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb__link:hover {
  color: var(--color-secondary);
}

.breadcrumb__sep {
  opacity: 0.45;
}

/* ---------- 14. 图片框架 ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  display: block;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame--16x9 {
  aspect-ratio: 16 / 9;
}

.image-frame--4x3 {
  aspect-ratio: 4 / 3;
}

.image-frame--3x4 {
  aspect-ratio: 3 / 4;
}

/* ---------- 15. 横向主题带与首屏 ---------- */
.theme-band {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(280px, 1fr);
  gap: var(--space-4);
  overflow-x: auto;
  padding-bottom: var(--space-3);
  scroll-snap-type: x mandatory;
}

.theme-band > * {
  scroll-snap-align: start;
}

.theme-band::-webkit-scrollbar {
  height: 6px;
}

.theme-band::-webkit-scrollbar-track {
  background: var(--color-surface-alt);
  border-radius: 3px;
}

.theme-band::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 3px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: center;
  padding: var(--space-7) 0;
}

/* ---------- 16. 内页头横幅 ---------- */
.page-header {
  position: relative;
  background:
    repeating-linear-gradient(
      -35deg,
      transparent 0 24px,
      rgba(255, 255, 255, 0.02) 24px 25px
    ),
    var(--color-primary);
  color: #fff;
  padding: var(--space-6) 0;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  top: -40%;
  right: 8%;
  width: 320px;
  height: 150%;
  border-radius: 50%;
  border: 2px dashed rgba(0, 230, 118, 0.22);
  transform: rotate(-25deg);
  pointer-events: none;
}

.page-header__title {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
}

.page-header__desc {
  margin-top: var(--space-2);
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
  max-width: 640px;
}

/* ---------- 17. 响应式调整 ---------- */
@media (max-width: 1023px) {
  h1 { font-size: 36px; }
  h2 { font-size: 28px; }
  h3 { font-size: 22px; }

  .site-footer__main {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-cols {
    grid-column: 1;
  }

  .footer-col--contact {
    grid-column: 2;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: var(--space-5) 0;
  }

  .nav-link {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
    font-size: 13px;
  }

  .nav-link::after {
    left: var(--space-2);
  }

  .nav-link:hover::after,
  .nav-link:focus-visible::after,
  .nav-link[aria-current="page"]::after {
    right: var(--space-2);
  }
}

@media (max-width: 767px) {
  body {
    font-size: 15px;
  }

  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  h3 { font-size: 20px; }

  .masthead-wrap {
    grid-template-columns: 1fr auto 1fr;
    padding: var(--space-3) var(--space-4);
  }

  .masthead-index {
    display: none;
  }

  .masthead-badge {
    display: none;
  }

  .brand__name {
    font-size: 28px;
  }

  .brand__sub {
    font-size: 9px;
    letter-spacing: 0.32em;
  }

  .nav-toggle {
    display: inline-flex;
    grid-column: 3;
    justify-self: end;
  }

  .site-nav {
    display: none;
  }

  .site-nav[data-open] {
    display: block;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: var(--space-2) var(--space-4) var(--space-4);
  }

  .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    padding: var(--space-3) var(--space-2);
    font-size: 15px;
  }

  .nav-link::after {
    left: var(--space-2);
  }

  .nav-link:hover::after,
  .nav-link:focus-visible::after,
  .nav-link[aria-current="page"]::after {
    right: var(--space-2);
  }

  .panel {
    padding: var(--space-5) 0;
  }

  .section-head {
    margin-bottom: var(--space-4);
  }

  .section-head__title {
    font-size: 24px;
  }

  .site-footer__main {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-cols {
    grid-column: auto;
  }

  .footer-col--contact {
    grid-column: auto;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .breadcrumb {
    font-size: 11px;
  }
}

@media (max-width: 480px) {
  .footer-cols {
    grid-template-columns: 1fr;
  }

  .brand__name {
    font-size: 24px;
  }

  .nav-toggle__text {
    display: none;
  }

  .nav-toggle {
    padding: var(--space-2);
  }
}

/* ---------- 18. 无 JS 降级 ---------- */
html:not(.js) .nav-toggle {
  display: none !important;
}

html:not(.js) .site-nav {
  display: block !important;
}