/* =========================================================
   K1体验场 — 全站共享样式 /assets/site.css
   设计语言：赛事数据坐标图 / 深色底 + 荧光绿 + 电光蓝 + 金
   ========================================================= */

/* ---------- 设计令牌 ---------- */
:root {
  --bg-base: #0A0E14;
  --bg-surface: #121822;
  --bg-elevated: #1A2230;
  --primary-neon: #C6FF3E;
  --secondary-electric: #00D4FF;
  --accent-gold: #FFC24B;
  --text-primary: #F2F6FA;
  --text-secondary: #A0AABA;
  --text-muted: #6B7A90;
  --line-subtle: #232B38;

  --font-heading: 'Noto Sans SC', 'Source Han Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'DIN Alternate', 'Bebas Neue', 'Noto Sans SC', sans-serif;

  --skew: -4deg;
  --rail-width: 280px;
  --header-bar-height: 64px;
  --container-max: 1200px;
  --ease-out-expo: cubic-bezier(0.22, 1, 0.36, 1);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

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

  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-float: 0 16px 48px rgba(0, 0, 0, 0.55);
  --glow-neon: 0 0 24px rgba(198, 255, 62, 0.28);
  --glow-electric: 0 0 24px rgba(0, 212, 255, 0.28);
}

/* ---------- Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--secondary-electric);
  text-decoration: none;
}

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

ul,
ol {
  margin: 0;
  padding-left: 1.25em;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transform: skewX(var(--skew));
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }

p {
  margin: 0 0 1em;
}

::selection {
  background: var(--primary-neon);
  color: var(--bg-base);
}

[hidden] {
  display: none !important;
}

/* ---------- 焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--secondary-electric);
  outline-offset: 3px;
  border-radius: 0;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 24px);
  padding-right: clamp(16px, 4vw, 24px);
}

.section {
  padding: clamp(var(--space-7), 6vw, var(--space-9)) 0;
}

.section--compact {
  padding: clamp(var(--space-5), 4vw, var(--space-7)) 0;
}

#main-content {
  display: block;
  min-height: 70vh;
}

@media (min-width: 1024px) {
  #main-content {
    margin-left: var(--rail-width);
  }
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid--3 {
    column-gap: var(--space-6);
  }
}

/* ---------- 正文排版 ---------- */
.prose {
  max-width: 720px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.prose h1,
.prose h2,
.prose h3 {
  color: var(--text-primary);
  margin-top: 1.5em;
}

.prose a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(0, 212, 255, 0.4);
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 10px 22px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  isolation: isolate;
  transition: color var(--transition-fast);
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: transparent;
  border: 1px solid var(--line-subtle);
  transform: skewX(var(--skew));
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn::after {
  content: '';
  position: absolute;
  right: 10px;
  width: 6px;
  height: 6px;
  background: var(--accent-gold);
  transform: rotate(45deg);
  opacity: 0;
  transition: opacity var(--transition-fast), right var(--transition-fast);
}

.btn:hover::after {
  opacity: 1;
  right: 7px;
}

.btn--neon {
  color: var(--bg-base);
  font-weight: 800;
}

.btn--neon::before {
  background: var(--primary-neon);
  border-color: var(--primary-neon);
  box-shadow: var(--glow-neon);
}

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

.btn--neon:hover::before {
  background: transparent;
  border-color: var(--primary-neon);
  box-shadow: 0 0 40px rgba(198, 255, 62, 0.4);
}

.btn--electric {
  color: var(--bg-base);
}

.btn--electric::before {
  background: var(--secondary-electric);
  border-color: var(--secondary-electric);
  box-shadow: var(--glow-electric);
}

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

.btn--electric:hover::before {
  background: transparent;
  border-color: var(--secondary-electric);
  box-shadow: 0 0 32px rgba(0, 212, 255, 0.4);
}

.btn--ghost {
  color: var(--text-secondary);
}

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

.btn--ghost:hover {
  color: var(--secondary-electric);
}

.btn--ghost:hover::before {
  border-color: var(--secondary-electric);
}

.btn--block {
  display: flex;
  width: 100%;
}

/* ---------- 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-primary);
  text-decoration: none;
}

.brand__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 6px;
  background: var(--primary-neon);
  color: var(--bg-base);
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  transform: skewX(var(--skew));
  box-shadow: var(--glow-neon);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  white-space: nowrap;
}

.brand__meta {
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--text-muted);
  margin: var(--space-5) 0;
}

.breadcrumbs__link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.breadcrumbs__sep {
  color: var(--text-muted);
  opacity: 0.6;
}

.breadcrumbs__current {
  color: var(--text-secondary);
  font-weight: 600;
}

/* ---------- 页面头 ---------- */
.page-head {
  padding: var(--space-7) 0 var(--space-6);
  border-bottom: 1px solid var(--line-subtle);
  margin-bottom: var(--space-6);
}

.page-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.page-head__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: var(--space-3);
}

.page-head__desc {
  max-width: 640px;
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--line-subtle);
  padding: var(--space-5);
  transition:
    transform var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: var(--shadow-float);
}

.card__title {
  font-size: 18px;
  margin-bottom: var(--space-2);
}

.card__body {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---------- 数据指标 ---------- */
.stat {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--bg-elevated);
  border-left: 2px solid var(--secondary-electric);
}

.stat__value {
  font-family: var(--font-data);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.stat__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(255, 194, 75, 0.08);
  border: 1px solid rgba(255, 194, 75, 0.35);
  color: var(--accent-gold);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.tag--neon {
  background: rgba(198, 255, 62, 0.08);
  border-color: rgba(198, 255, 62, 0.35);
  color: var(--primary-neon);
}

.tag--electric {
  background: rgba(0, 212, 255, 0.08);
  border-color: rgba(0, 212, 255, 0.35);
  color: var(--secondary-electric);
}

/* ---------- 图例 ---------- */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-surface);
  border: 1px solid var(--line-subtle);
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--text-secondary);
}

.legend__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--secondary-electric);
}

.legend__dot--neon { background: var(--primary-neon); }
.legend__dot--gold { background: var(--accent-gold); }
.legend__dot--muted { background: var(--text-muted); }

/* ---------- 图片占位 ---------- */
.img-placeholder {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(10, 14, 20, 0.4)),
    var(--bg-elevated);
  border: 1px solid var(--line-subtle);
}

.img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0px,
    transparent 14px,
    rgba(198, 255, 62, 0.05) 14px,
    rgba(198, 255, 62, 0.05) 15px
  );
  pointer-events: none;
}

.img-placeholder > * {
  position: relative;
  z-index: 1;
}

.img-placeholder--full {
  aspect-ratio: 21 / 9;
}

.img-placeholder--tall {
  aspect-ratio: 3 / 4;
}

.img-placeholder__label {
  padding: var(--space-2) var(--space-3);
  background: rgba(10, 14, 20, 0.72);
  border: 1px solid var(--line-subtle);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ---------- 分隔与速度线 ---------- */
.rule {
  border: none;
  height: 1px;
  background: var(--line-subtle);
  margin: var(--space-7) 0;
}

.speed-line {
  display: block;
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, var(--secondary-electric), transparent);
  transform: skewX(-16deg);
  margin: var(--space-4) 0;
}

.speed-line--neon {
  background: linear-gradient(90deg, var(--primary-neon), transparent);
}

.speed-line--gold {
  background: linear-gradient(90deg, var(--accent-gold), transparent);
}

/* =========================================================
   头部 — 移动端顶栏 + 抽屉 / 桌面端侧边轨道
   ========================================================= */
.site-header {
  position: relative;
  z-index: 100;
}

.skip-link {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  background: var(--primary-neon);
  color: var(--bg-base);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  transform: translateY(-300%);
  transition: transform var(--transition-base);
}

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

.scroll-progress {
  --progress: 0%;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 300;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    var(--primary-neon) 0%,
    var(--secondary-electric) var(--progress),
    transparent var(--progress)
  );
  opacity: 0.9;
}

.header__bar {
  position: sticky;
  top: 0;
  z-index: 210;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: var(--header-bar-height);
  padding: 0 var(--space-5);
  background: rgba(10, 14, 20, 0.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-subtle);
}

.header__bar .brand__meta {
  display: none;
}

@media (min-width: 768px) {
  .header__bar .brand__meta {
    display: block;
  }
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 12px;
  background: transparent;
  border: 1px solid var(--line-subtle);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--secondary-electric);
  background: rgba(0, 212, 255, 0.05);
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition:
    transform var(--transition-base),
    opacity var(--transition-base),
    background var(--transition-base);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

/* ---------- 导航抽屉 / 轨道 ---------- */
.site-nav {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  width: min(340px, 85vw);
  max-width: 340px;
  padding:
    calc(var(--header-bar-height) + var(--space-5))
    var(--space-5)
    var(--space-6);
  background: var(--bg-surface);
  border-right: 1px solid var(--line-subtle);
  box-shadow: 16px 0 48px rgba(0, 0, 0, 0.5);
  transform: translateX(-105%);
  visibility: hidden;
  transition:
    transform 0.4s var(--ease-out-expo),
    visibility 0.4s var(--ease-out-expo);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.site-nav[data-open] {
  transform: translateX(0);
  visibility: visible;
}

.site-nav__brand {
  display: none;
}

.site-nav__index {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--line-subtle);
}

.site-nav__index-en {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.site-nav__index-cn {
  margin-left: auto;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  border-bottom: 1px solid var(--line-subtle);
}

.site-nav__item:first-child {
  border-top: 1px solid var(--line-subtle);
}

.site-nav__link {
  display: block;
  flex: 1;
  padding: var(--space-3) 0;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition:
    color var(--transition-fast),
    padding-left var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--text-primary);
  padding-left: var(--space-2);
}

.site-nav__link[aria-current="page"] {
  position: relative;
  color: var(--secondary-electric);
}

.site-nav__link[aria-current="page"]::before {
  content: '';
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  background: var(--primary-neon);
  box-shadow: var(--glow-neon);
}

.site-nav__num {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.site-nav__item:has(.site-nav__link[aria-current="page"]) .site-nav__num {
  color: var(--accent-gold);
}

.site-nav__cta {
  margin-top: var(--space-5);
}

.site-nav__note {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-4);
  border-top: 1px dashed var(--line-subtle);
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-muted);
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(4, 7, 11, 0.68);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.header__status {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--line-subtle);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.header__status-dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-neon);
  box-shadow: 0 0 8px rgba(198, 255, 62, 0.8);
  animation: k1-pulse 2.2s ease-in-out infinite;
}

@keyframes k1-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.8); }
}

.header__status-text {
  color: var(--text-secondary);
}

.header__status-coord {
  font-family: var(--font-data);
  letter-spacing: 0.12em;
}

.header__rail-label {
  display: none;
}

/* ---------- 桌面端：侧边轨道 ---------- */
@media (min-width: 1024px) {
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    z-index: 100;
    background:
      repeating-linear-gradient(
        0deg,
        transparent 0px,
        transparent 39px,
        rgba(255, 255, 255, 0.025) 39px,
        rgba(255, 255, 255, 0.025) 40px
      ),
      linear-gradient(180deg, rgba(0, 212, 255, 0.06) 0%, transparent 220px),
      var(--bg-surface);
    border-right: 1px solid var(--line-subtle);
  }

  .header__bar {
    display: none;
  }

  .site-nav {
    position: static;
    flex: 1;
    min-height: 0;
    width: auto;
    max-width: none;
    padding: var(--space-6) var(--space-5) var(--space-5);
    background: transparent;
    border-right: none;
    box-shadow: none;
    transform: none;
    visibility: visible;
    transition: none;
    overflow-y: auto;
  }

  .site-nav__brand {
    display: block;
    margin-bottom: var(--space-5);
  }

  .site-nav__cta {
    margin-top: auto;
  }

  .site-nav__note {
    margin-top: var(--space-4);
  }

  .header__status {
    display: flex;
    flex-shrink: 0;
  }

  .header__rail-label {
    display: block;
    position: absolute;
    left: 4px;
    top: 104px;
    writing-mode: vertical-rl;
    font-family: var(--font-data);
    font-size: 9px;
    letter-spacing: 0.32em;
    color: var(--text-muted);
    text-transform: uppercase;
    pointer-events: none;
    opacity: 0.7;
  }

  .nav-backdrop {
    display: none;
  }

  #main-content,
  .site-footer {
    margin-left: var(--rail-width);
  }
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  background: var(--bg-base);
  border-top: 1px solid var(--line-subtle);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--primary-neon) 0%,
    var(--secondary-electric) 45%,
    transparent 85%
  );
  pointer-events: none;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-7) var(--space-5) var(--space-6);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: var(--space-6);
  }
}

.footer__brand .brand {
  margin-bottom: var(--space-4);
}

.footer__about {
  max-width: 320px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.footer__trust {
  display: inline-flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  margin-top: var(--space-4);
  background: rgba(198, 255, 62, 0.06);
  border-left: 2px solid var(--primary-neon);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.footer__heading {
  margin: 0 0 var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--line-subtle);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

.footer__heading-num {
  display: inline-block;
  margin-right: var(--space-2);
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--accent-gold);
}

.footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.footer__list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition:
    color var(--transition-fast),
    transform var(--transition-fast);
}

.footer__list a:hover {
  color: var(--secondary-electric);
  transform: translateX(4px);
}

.footer__contact {
  gap: 0;
}

.footer__contact-item {
  display: grid;
  gap: 2px;
  padding: var(--space-3) 0;
  border-bottom: 1px dashed var(--line-subtle);
}

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

.footer__contact-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.footer__contact-value {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
  overflow-wrap: anywhere;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--line-subtle);
  font-size: 12px;
  color: var(--text-muted);
}

.footer__copyright {
  margin: 0;
}

.footer__icp {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
}

.footer__icp-mark {
  display: inline-block;
  font-size: 10px;
  color: var(--accent-gold);
}

.footer__status {
  margin: 0;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

/* ---------- 抽屉锁定 ---------- */
body.nav-locked {
  overflow: hidden;
}

/* ---------- 滚动显现 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.6s var(--ease-out-expo),
    transform 0.6s var(--ease-out-expo);
}

.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 动效偏好 ---------- */
@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;
    transition-delay: 0ms !important;
  }

  .site-nav {
    transition: none;
  }

  .js-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .header__status-dot {
    animation: none;
  }

  [data-scroll-progress] {
    display: none;
  }
}