/* ==========================================================
   中欧体育官方平台 Site Kit
   /assets/site.css
   深蓝 + 亮橙比分牌式视觉系统
   ========================================================== */

/* ---------- Reset & 变量 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #0B1E3F;
  --color-primary-2: #1A3A6B;
  --color-accent: #FF6B35;
  --color-accent-dark: #E64A19;
  --color-silver: #C0C0C0;
  --color-bg-light: #F5F7FA;
  --color-text: #0D1117;
  --color-text-soft: #5A6474;
  --color-border: #E4E8EE;
  --color-white: #FFFFFF;

  --font-heading: Oswald, Impact, "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: Inter, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-number: "Roboto Mono", "SF Mono", Consolas, "Liberation Mono", monospace;

  --header-h: 76px;
  --container-max: 1240px;
  --shadow-1: 0 2px 10px rgba(11, 30, 63, .08);
  --shadow-2: 0 8px 28px rgba(11, 30, 63, .18);
  --transition: .25s cubic-bezier(.4, 0, .2, 1);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: .02em;
  text-transform: uppercase;
  color: var(--color-primary);
}

p { text-wrap: pretty; }
a { color: var(--color-primary); }
a:hover { color: var(--color-accent-dark); }
img, svg, video { display: block; max-width: 100%; }
button { font-family: inherit; }
ul[class], ol[class] { list-style: none; }

[hidden] { display: none !important; }

::selection {
  background: var(--color-accent);
  color: #fff;
}

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

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1200;
  padding: 10px 18px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  border-radius: 2px;
  box-shadow: var(--shadow-2);
  transform: translateY(-160%);
  transition: transform var(--transition);
}
.skip-link:focus-visible { transform: none; }

/* ---------- 阅读进度条 ---------- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1100;
  height: 3px;
  width: 0;
  background: var(--color-accent);
  pointer-events: none;
}

/* ---------- 容器与章节 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: 72px; }
.section--tint { background: var(--color-bg-light); }
.section--dark {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-2));
  color: rgba(255,255,255,.85);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

/* ---------- 内页头屏 ---------- */
.page-hero {
  background: var(--color-bg-light);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0 40px;
}
.page-hero__title {
  font-size: clamp(34px, 5vw, 56px);
  margin-bottom: 10px;
}
.page-hero__text {
  max-width: 60ch;
  color: var(--color-text-soft);
  font-size: 17px;
}
.page-hero--dark {
  background: var(--color-primary);
  border-bottom-color: var(--color-accent);
}
.page-hero--dark .page-hero__title { color: #fff; }
.page-hero--dark .page-hero__text { color: rgba(255,255,255,.78); }

/* ---------- 文字工具 ---------- */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-number);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
}
.section-tag::before {
  content: "";
  flex: none;
  width: 10px;
  height: 18px;
  background: var(--color-accent);
  transform: skewX(-20deg);
}
.section-tag--invert { color: var(--color-accent); }

.display-title {
  font-size: clamp(44px, 7vw, 78px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: .01em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.section-title { font-size: clamp(28px, 4vw, 44px); margin-bottom: 16px; }
.lede {
  font-size: 18px;
  line-height: 1.8;
  color: var(--color-text-soft);
  max-width: 60ch;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: .8em 1.5em;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}
.btn:active { transform: translateY(1px); }
.btn-accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
}
.btn-ghost {
  border-color: rgba(255,255,255,.7);
  color: #fff;
}
.btn-ghost:hover {
  background: rgba(255,255,255,.14);
  border-color: #fff;
  color: #fff;
}
.btn-light {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-light:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ---------- 网格与卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  padding: 28px;
  box-shadow: var(--shadow-1);
}
.card__title { font-size: 20px; margin-bottom: 10px; }
.card__text { font-size: 15px; color: var(--color-text-soft); }
.card--dark {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-2));
  border-color: rgba(255,255,255,.08);
  border-top-color: var(--color-accent);
}
.card--dark .card__title { color: #fff; }
.card--dark .card__text { color: rgba(255,255,255,.75); }

/* ---------- 数据数字与表格 ---------- */
.data-number {
  font-family: var(--font-number);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent-dark);
  font-variant-numeric: tabular-nums;
}
.data-number--light { color: var(--color-accent); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}
.data-table th {
  font-family: var(--font-heading);
  font-size: 14px;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-align: left;
  padding: 10px 14px;
  background: var(--color-primary);
  color: #fff;
}
.data-table th:first-child { border-left: 4px solid var(--color-accent); }
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
}
.data-table tbody tr:nth-child(even) { background: var(--color-bg-light); }
.data-table td.num {
  font-family: var(--font-number);
  font-weight: 600;
  color: var(--color-accent-dark);
}

/* ---------- 标签与时间轴 ---------- */
.tag {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-number);
  font-size: 12px;
  letter-spacing: .08em;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  color: var(--color-text-soft);
}
.tag--accent {
  background: rgba(255,107,53,.12);
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.timeline {
  position: relative;
  display: grid;
  gap: 32px;
  padding-left: 28px;
  border-left: 3px solid var(--color-border);
}
.timeline > li, .timeline__item { position: relative; }
.timeline > li::before, .timeline__item::before {
  content: "";
  position: absolute;
  top: 6px;
  left: -34px;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  transform: skewX(-20deg);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  font-size: 14px;
}
.breadcrumb a { color: var(--color-primary); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-accent-dark); }
.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-silver);
}
.breadcrumb [aria-current="page"] { color: var(--color-text-soft); font-weight: 500; }

/* ---------- 标签页 ---------- */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 2px solid var(--color-border);
}
.tab {
  appearance: none;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  padding: 12px 18px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}
.tab:hover { color: var(--color-primary); }
.tab[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}
.tab-panel { padding-top: 28px; }

/* ---------- 媒体占位容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, transparent 0 14px, rgba(11,30,63,.05) 14px 15px);
}
.media-frame[data-label]::after {
  content: attr(data-label);
  position: relative;
  z-index: 2;
  padding: 6px 12px;
  background: #fff;
  border: 1px solid var(--color-border);
  font-family: var(--font-number);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.media-frame img,
.media-frame svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 装饰元素 ---------- */
.slash {
  display: inline-block;
  width: 10px;
  height: 20px;
  margin-inline: 8px;
  background: var(--color-accent);
  transform: skewX(-22deg);
}
.band {
  position: relative;
  overflow: hidden;
  background: var(--color-primary);
  color: #fff;
}
.band::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(115deg, transparent 60%, rgba(255,107,53,.9) 60.5%, rgba(255,107,53,.9) 63%, transparent 63.5%),
    linear-gradient(115deg, transparent 72%, rgba(255,107,53,.55) 72.5%, rgba(255,107,53,.55) 75%, transparent 75.5%);
}

/* ---------- 滚动显现 ---------- */
.js-ready .reveal {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition: opacity .6s ease, transform .6s ease;
}
.js-ready .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================
   页头
   ========================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: var(--color-primary);
  color: #fff;
  border-bottom: 3px solid var(--color-accent);
  box-shadow: var(--shadow-1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--container-max);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: 24px;
}

/* 品牌块 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
  flex: none;
}
.brand:hover { color: #fff; }
.brand-mark {
  flex: none;
  display: block;
  width: 14px;
  height: 24px;
  background: var(--color-accent);
  box-shadow: 10px 0 0 rgba(255,255,255,.18);
  transform: skewX(-20deg);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: #fff;
  white-space: nowrap;
}
.brand-slogan {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-silver);
}

/* 导航（桌面） */
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: var(--header-h);
  padding: 0 14px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: rgba(255,255,255,.85);
  text-decoration: none;
  transition: color var(--transition);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 10px;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.site-nav__link:hover { color: #fff; }
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: #fff; }

/* 页头右侧 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: none;
}
.header-cta {
  font-size: 14px;
  padding: .65em 1.2em;
}

/* 移动端汉堡按钮 */
.nav-trigger {
  display: none;
  position: relative;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,.25);
  background: rgba(255,255,255,.06);
  cursor: pointer;
  transition: background var(--transition);
}
.nav-trigger:hover { background: rgba(255,255,255,.14); }
.nav-trigger__icon {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  transition: background-color .2s ease;
}
.nav-trigger__icon::before,
.nav-trigger__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: #fff;
  transition: transform var(--transition);
}
.nav-trigger__icon::before { top: -6px; }
.nav-trigger__icon::after { top: 6px; }
.nav-trigger[aria-expanded="true"] .nav-trigger__icon { background: transparent; }
.nav-trigger[aria-expanded="true"] .nav-trigger__icon::before { transform: translateY(6px) rotate(45deg); }
.nav-trigger[aria-expanded="true"] .nav-trigger__icon::after { transform: translateY(-6px) rotate(-45deg); }

/* 移动端导航开合态 */
@media (max-width: 1023px) {
  :root { --header-h: 68px; }

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

  .site-nav {
    position: absolute;
    top: calc(var(--header-h) + 3px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 22px;
    background: var(--color-primary);
    border-bottom: 3px solid var(--color-accent);
    box-shadow: var(--shadow-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }
  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav__link {
    min-height: 46px;
    font-size: 17px;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .site-nav__link::after { display: none; }
  .site-nav__link:hover { background: rgba(255,255,255,.05); }
  .site-nav__link[aria-current="page"] {
    color: var(--color-accent);
    border-left: 3px solid var(--color-accent);
    padding-left: 12px;
  }
}

/* ==========================================================
   页脚
   ========================================================== */
.site-footer {
  background: linear-gradient(150deg, var(--color-primary) 0%, #0A1A36 60%, var(--color-primary-2) 100%);
  color: rgba(255,255,255,.8);
  border-top: 4px solid var(--color-accent);
  font-size: 15px;
}

/* 顶端信任声明 */
.footer-ticker {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 24px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  background: rgba(255,255,255,.04);
  text-align: center;
  font-family: var(--font-number);
  font-size: 13px;
  letter-spacing: .06em;
}
.footer-ticker__dot {
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  transform: skewX(-20deg);
  animation: tickerDot 1.8s ease-in-out infinite;
}
@keyframes tickerDot {
  0%, 100% { opacity: .35; }
  50% { opacity: 1; }
}

/* 页脚主体网格 */
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.1fr 1.3fr;
  gap: 48px;
  padding-block: 52px 44px;
}

.footer-brand .brand-name { font-size: 20px; }
.footer-brand .brand-slogan { text-align: left; }
.footer-about {
  margin-top: 18px;
  max-width: 42ch;
  color: rgba(255,255,255,.65);
  line-height: 1.8;
}

.footer-col { min-width: 0; }
.footer-heading {
  position: relative;
  padding-left: 14px;
  margin-bottom: 16px;
  font-size: 16px;
  letter-spacing: .1em;
  color: #fff;
}
.footer-heading::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 6px;
  height: 16px;
  background: var(--color-accent);
  transform: skewX(-20deg);
}

.footer-links {
  display: grid;
  gap: 8px;
  list-style: none;
}
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.72);
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}
.footer-links a::before {
  content: "›";
  color: var(--color-accent);
  font-weight: 700;
}
.footer-links a:hover {
  color: var(--color-accent);
  transform: translateX(3px);
}

.footer-contact {
  display: grid;
  gap: 4px;
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.68);
}

/* 页脚底部 */
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 0 22px;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: 13px;
  color: rgba(255,255,255,.55);
}
.footer-bottom a {
  color: rgba(255,255,255,.6);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-bottom a:hover { color: var(--color-accent); }

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width: 992px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .section { padding-block: 56px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .container { padding-inline: 18px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .section { padding-block: 44px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; padding-block: 40px 32px; }
  .footer-brand { grid-column: auto; }
  .footer-ticker { flex-direction: column; gap: 8px; }
}

@media (max-width: 420px) {
  .header-inner { padding-inline: 16px; gap: 10px; }
  .brand-name { font-size: 17px; letter-spacing: .02em; }
  .header-cta { display: none; }
  .display-title { font-size: 38px; }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js-ready .reveal,
  .reveal,
  .reveal.is-visible {
    opacity: 1 !important;
    transform: none !important;
  }
  .footer-ticker__dot { animation: none; }
}