/* ============================================================
   bet365竞技场 · 365bet CN — 全站共享样式表 /assets/site.css
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  /* 色彩系统 */
  --clr-primary: #0A3B2E;
  --clr-accent: #C9A227;
  --clr-alert: #8B1E2D;
  --clr-slate: #4A5B6B;
  --clr-paper: #F5F2EB;
  --clr-charcoal: #1A1C1E;
  --clr-border: #D9D9D9;
  --clr-green: #0F5C44;
  --clr-gold-light: #E0BB3A;
  --clr-paper-dim: rgba(245, 242, 235, 0.72);
  --clr-paper-faint: rgba(245, 242, 235, 0.5);

  /* 字体 */
  --font-display: 'DIN Alternate', 'Arial Narrow', 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Menlo, Consolas, 'Roboto Mono', 'Liberation Mono', monospace;

  /* 字号 */
  --fs-hero: clamp(2rem, 5vw, 4rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.25rem);
  --fs-h3: clamp(1.2rem, 2vw, 1.5rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-micro: 0.75rem;
  --fs-label: 0.6875rem;

  /* 行高 */
  --lh-body: 1.7;
  --lh-tight: 1.2;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;

  /* 圆角 */
  --radius-card: 3px;
  --radius-pill: 999px;
  --radius-panel: 12px;

  /* 阴影 */
  --shadow-xs: 0 1px 3px rgba(26, 28, 30, 0.08);
  --shadow-md: 0 4px 16px rgba(10, 59, 46, 0.12);
  --shadow-lg: 0 12px 32px rgba(10, 59, 46, 0.18);

  /* 动效 */
  --t-fast: 140ms ease;
  --t-base: 220ms ease;
  --t-slow: 380ms ease;

  /* 布局 */
  --content-max: 1280px;
  --header-h: 72px;
  --header-h-mobile: 60px;
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--clr-primary);
  background-color: var(--clr-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: var(--clr-green);
  text-decoration: none;
  transition: color var(--t-base), border-color var(--t-base), background-color var(--t-base);
}

a:hover {
  color: var(--clr-primary);
}

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--clr-accent);
  color: var(--clr-primary);
}

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

/* ---------- 3. 基础排版 ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: var(--lh-tight);
  color: var(--clr-primary);
  letter-spacing: -0.01em;
}

h1 {
  font-size: var(--fs-hero);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-h3);
}

p {
  margin: 0;
}

/* ---------- 4. 工具类 ---------- */
.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.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;
}

/* ---------- 5. 网格系统 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-4);
}

.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; }

.split-hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: var(--space-5) var(--space-6);
  align-items: center;
  min-height: 70vh;
  padding: calc(var(--header-h) + var(--space-6)) 0 var(--space-6);
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-card);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 700;
  line-height: 1.5;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--t-base), color var(--t-base), border-color var(--t-base), box-shadow var(--t-base), transform var(--t-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn--gold {
  background: var(--clr-accent);
  color: var(--clr-primary);
}

.btn--gold:hover {
  background: var(--clr-gold-light);
  color: var(--clr-primary);
  box-shadow: 0 4px 12px rgba(201, 162, 39, 0.35);
}

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

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

.btn--dark {
  background: var(--clr-primary);
  color: var(--clr-paper);
}

.btn--dark:hover {
  background: var(--clr-green);
  color: var(--clr-paper);
}

.btn--sm {
  padding: 6px 16px;
  font-size: var(--fs-micro);
}

/* ---------- 7. 卡片 ---------- */
.card {
  background: #FCFBF7;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  box-shadow: var(--shadow-xs);
  position: relative;
}

.card--hover {
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}

.card--hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(201, 162, 39, 0.4);
}

.card--dark {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: var(--clr-paper);
}

.card--dark h1,
.card--dark h2,
.card--dark h3 {
  color: var(--clr-paper);
}

/* ---------- 8. 标签与标识 ---------- */
.exhibit-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--clr-alert);
  color: #FFFFFF;
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 12px 4px 8px;
  border-radius: 2px 999px 999px 2px;
  text-transform: uppercase;
  line-height: 1.4;
}

.exhibit-tag::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #FFFFFF;
  margin-right: 2px;
}

.exhibit-tag--gold {
  background: var(--clr-accent);
  color: var(--clr-primary);
}

.exhibit-tag--gold::before {
  background: var(--clr-primary);
}

.exhibit-tag--slate {
  background: var(--clr-slate);
  color: #FFFFFF;
}

.zone-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: var(--fs-label);
  font-weight: 900;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: var(--space-2);
}

.zone-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 2px;
  background: var(--clr-accent);
  flex-shrink: 0;
}

.data-digit {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5em;
  line-height: 1;
  color: var(--clr-primary);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.card--dark .data-digit {
  color: var(--clr-paper);
}

/* ---------- 9. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 59, 46, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(245, 242, 235, 0.08);
  transition: background-color var(--t-slow), box-shadow var(--t-slow), border-color var(--t-slow);
}

.site-header[data-scrolled] {
  background: rgba(10, 59, 46, 0.97);
  box-shadow: 0 4px 24px rgba(10, 59, 46, 0.35);
  border-bottom-color: rgba(201, 162, 39, 0.2);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  position: relative;
}

/* 品牌 */
.site-header__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-decoration: none;
  line-height: 1;
  flex-shrink: 0;
  transition: opacity var(--t-fast);
}

.site-header__brand:hover {
  opacity: 0.85;
}

.site-header__wordmark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.45rem;
  letter-spacing: 0.02em;
  color: var(--clr-paper);
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-header__cn {
  font-size: 0.62em;
  color: var(--clr-accent);
  border: 1px solid rgba(201, 162, 39, 0.55);
  border-radius: 2px;
  padding: 2px 5px;
  letter-spacing: 0.06em;
  vertical-align: middle;
}

.site-header__arena {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--clr-paper-faint);
  margin-top: 5px;
  white-space: nowrap;
}

/* 滚动进度条 */
.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-gold-light));
  z-index: 1002;
  pointer-events: none;
  border-radius: 0 999px 999px 0;
}

/* ---------- 10. 导航胶囊 ---------- */
.nav-capsule {
  display: flex;
  align-items: center;
}

.nav-capsule__list {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(245, 242, 235, 0.07);
  border: 1px solid rgba(245, 242, 235, 0.14);
  border-radius: var(--radius-pill);
  padding: 4px;
}

.nav-capsule__item {
  position: relative;
}

.nav-capsule__link {
  display: block;
  padding: 8px 18px;
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--clr-paper-dim);
  border-radius: var(--radius-pill);
  text-decoration: none;
  position: relative;
  transition: background-color var(--t-base), color var(--t-base);
  white-space: nowrap;
}

.nav-capsule__link::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 3px;
  height: 2px;
  background: var(--clr-accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-base);
}

.nav-capsule__link:hover {
  color: var(--clr-paper);
  background: rgba(245, 242, 235, 0.1);
}

.nav-capsule__link:hover::after {
  transform: scaleX(1);
}

.nav-capsule__link[aria-current="page"] {
  color: var(--clr-paper);
  background: rgba(201, 162, 39, 0.16);
}

.nav-capsule__link[aria-current="page"]::after {
  transform: scaleX(1);
}

/* ---------- 11. 移动开关 ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-card);
  cursor: pointer;
  position: relative;
  z-index: 1001;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-paper);
  border-radius: 2px;
  transition: transform var(--t-base), opacity var(--t-base);
}

.nav-toggle__bar + .nav-toggle__bar {
  margin-top: 5px;
}

.nav-toggle[data-open] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[data-open] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[data-open] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

/* ---------- 12. 页脚 ---------- */
.site-footer {
  background: var(--clr-charcoal);
  color: rgba(245, 242, 235, 0.75);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
  border-top: 3px solid var(--clr-accent);
  margin-top: var(--space-7);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 5fr 3fr 4fr;
  gap: var(--space-6);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.35rem;
  color: var(--clr-paper);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.site-footer__brand-cn {
  color: var(--clr-accent);
  font-size: 0.62em;
  border: 1px solid rgba(201, 162, 39, 0.55);
  border-radius: 2px;
  padding: 1px 5px;
  margin-left: 5px;
  vertical-align: middle;
}

.site-footer__motto {
  font-size: var(--fs-micro);
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--clr-paper-dim);
  margin-top: var(--space-2);
}

.site-footer__desc {
  margin-top: var(--space-4);
  color: rgba(245, 242, 235, 0.6);
  font-size: var(--fs-small);
  max-width: 34ch;
}

.site-footer__heading {
  font-family: var(--font-body);
  font-size: var(--fs-label);
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-1);
  border-bottom: 1px solid rgba(245, 242, 235, 0.12);
  display: inline-block;
}

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

.site-footer__list a {
  color: rgba(245, 242, 235, 0.75);
  position: relative;
  display: inline-block;
  padding: 2px 0;
  transition: color var(--t-fast), padding-left var(--t-fast);
}

.site-footer__list a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--clr-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-base);
}

.site-footer__list a:hover {
  color: var(--clr-paper);
  padding-left: 4px;
}

.site-footer__list a:hover::after {
  transform: scaleX(1);
}

.site-footer__contact {
  margin-top: var(--space-4);
  font-size: var(--fs-micro);
  color: rgba(245, 242, 235, 0.5);
  line-height: 1.9;
}

.site-footer__contact li {
  padding-left: var(--space-3);
  position: relative;
}

.site-footer__contact li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--clr-accent);
  font-weight: 700;
}

.site-footer__bottom {
  border-top: 1px solid rgba(245, 242, 235, 0.08);
  padding: var(--space-3) 0;
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-micro);
  color: rgba(245, 242, 235, 0.45);
}

/* ---------- 13. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-size: var(--fs-small);
  padding: var(--space-3) 0;
  color: var(--clr-slate);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  color: var(--clr-border);
  font-size: var(--fs-micro);
  margin: 0 4px;
}

.breadcrumb__link {
  color: var(--clr-green);
}

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

.breadcrumb__link[aria-current="page"] {
  color: var(--clr-slate);
  pointer-events: none;
  font-weight: 500;
}

/* ---------- 14. 页头标题组 ---------- */
.page-heading {
  padding-top: calc(var(--header-h) + var(--space-5));
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--clr-border);
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.page-heading__kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: var(--fs-label);
  font-weight: 900;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: var(--space-2);
}

.page-heading__kicker::before {
  content: '';
  display: block;
  width: 28px;
  height: 2px;
  background: var(--clr-accent);
}

.page-heading__title {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 900;
  line-height: 1.15;
  color: var(--clr-primary);
  letter-spacing: -0.01em;
}

.page-heading__desc {
  margin-top: var(--space-2);
  color: var(--clr-slate);
  font-size: var(--fs-small);
  max-width: 70ch;
}

/* ---------- 15. 图片框架 ---------- */
.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(10, 59, 46, 0.9) 0%, rgba(10, 59, 46, 0.55) 60%, rgba(74, 91, 107, 0.4) 100%),
    repeating-linear-gradient(-45deg, transparent 0, transparent 10px, rgba(255, 255, 255, 0.05) 10px, rgba(255, 255, 255, 0.05) 11px);
  border: 1px solid var(--clr-border);
  min-height: 120px;
  border-radius: var(--radius-card);
}

.image-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 59, 46, 0.35) 0%, transparent 45%);
  pointer-events: none;
}

.image-frame--16x9 { aspect-ratio: 16 / 9; }
.image-frame--4x3 { aspect-ratio: 4 / 3; }
.image-frame--1x1 { aspect-ratio: 1 / 1; }
.image-frame--21x9 { aspect-ratio: 21 / 9; }

/* ---------- 16. 装饰 ---------- */
.divider-slash {
  height: 20px;
  border: none;
  background:
    repeating-linear-gradient(
      -45deg,
      var(--clr-accent) 0,
      var(--clr-accent) 2px,
      transparent 2px,
      transparent 12px
    );
  opacity: 0.2;
  margin: 0;
}

.track-line {
  height: 2px;
  border: none;
  background: linear-gradient(90deg, var(--clr-accent) 0%, var(--clr-accent) 48px, var(--clr-border) 48px, var(--clr-border) 100%);
  opacity: 0.7;
}

/* ---------- 17. 移动端适配 ---------- */
@media (max-width: 1023px) {
  .grid-12 {
    gap: var(--space-3);
  }

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5) var(--space-4);
  }

  .site-footer__col--brand {
    grid-column: span 2;
  }
}

@media (max-width: 767px) {
  .site-header__inner {
    height: var(--header-h-mobile);
  }

  .site-header__wordmark {
    font-size: 1.2rem;
  }

  .site-header__arena {
    display: none;
  }

  /* 移动导航下拉 */
  .nav-toggle {
    display: flex;
  }

  .nav-capsule {
    position: absolute;
    top: calc(100% - 2px);
    left: var(--space-3);
    right: var(--space-3);
    background: var(--clr-primary);
    border-radius: var(--radius-panel);
    padding: var(--space-2);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(201, 162, 39, 0.25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--t-base), transform var(--t-base), visibility var(--t-base);
    pointer-events: none;
  }

  .nav-capsule[data-open],
  .nav-capsule[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-capsule__list {
    flex-direction: column;
    align-items: stretch;
    background: transparent;
    border: none;
    padding: 0;
    gap: 0;
    border-radius: 0;
  }

  .nav-capsule__link {
    display: block;
    padding: 12px 16px;
    border-radius: var(--radius-card);
    text-align: left;
    border-bottom: 1px solid rgba(245, 242, 235, 0.07);
  }

  .nav-capsule__link:last-of-type {
    border-bottom: none;
  }

  .nav-capsule__link::after {
    left: 16px;
    right: auto;
    width: 0;
    height: 2px;
  }

  .nav-capsule__link[aria-current="page"]::after {
    width: 32px;
  }

  /* 网格单列 */
  .grid-12 {
    grid-template-columns: 1fr;
  }

  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-12 {
    grid-column: span 1;
  }

  .split-hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: calc(var(--header-h-mobile) + var(--space-5));
    gap: var(--space-4);
  }

  .page-heading {
    padding-top: calc(var(--header-h-mobile) + var(--space-4));
  }

  /* 页脚单列 */
  .site-footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    padding-top: var(--space-5);
    padding-bottom: var(--space-5);
  }

  .site-footer__col--brand {
    grid-column: span 1;
  }

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

/* ---------- 18. 平板微调 ---------- */
@media (min-width: 768px) and (max-width: 1023px) {
  .nav-capsule__link {
    padding: 7px 12px;
    font-size: var(--fs-micro);
    font-weight: 700;
  }
}

/* ---------- 19. 可访问性 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-3);
  z-index: 3000;
  background: var(--clr-accent);
  color: var(--clr-primary);
  padding: 10px 20px;
  border-radius: 2px;
  font-weight: 700;
  font-family: var(--font-body);
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(10, 59, 46, 0.3);
  transition: top var(--t-fast), transform var(--t-fast);
}

.skip-link:focus-visible,
.skip-link:focus {
  top: var(--space-3);
  outline: 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;
  }
}

/* 滚动进度条在 reduced-motion 下仍然可用但不带动画 */
@media (prefers-reduced-motion: reduce) {
  .scroll-progress {
    transition: none;
  }
}