* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
}
html { scroll-behavior: smooth; }
body {
  background: linear-gradient(165deg, #0b1622 0%, #152a4a 30%, #1e3a5f 60%, #0d3b66 100%);
  color: #d8e5f0;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 导航 */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(10, 22, 38, 0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.site-header .container {
  display: flex; align-items: center; justify-content: center; min-height: 64px;
}
.nav-links {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: center; padding: 12px 0;
}
.nav-links a {
  color: #c8d9ea; text-decoration: none; padding: 8px 20px; border-radius: 30px;
  font-size: 15px; font-weight: 500; border: 1px solid transparent;
  transition: all 0.3s ease; letter-spacing: 0.3px;
}
.nav-links a:hover {
  color: #ffffff; background: rgba(14, 165, 233, 0.15);
  border-color: rgba(14, 165, 233, 0.3);
}

/* 通用区块 */
.section { padding: 70px 0; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-block; background: linear-gradient(135deg, rgba(14,165,233,0.2), rgba(56,189,248,0.1));
  color: #7dd3fc; padding: 4px 16px; border-radius: 30px; font-size: 13px; font-weight: 600;
  letter-spacing: 1px; text-transform: uppercase; border: 1px solid rgba(14,165,233,0.3); margin-bottom: 12px;
}
.section-header h2 {
  font-size: 34px; font-weight: 700; color: #f0f7ff; letter-spacing: -0.5px;
  background: linear-gradient(135deg, #f0f9ff, #7dd3fc);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.section-header p { color: #8ba3b9; max-width: 600px; margin: 12px auto 0; }

/* 玻璃卡片 */
.glass-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.1);
  border-color: rgba(14,165,233,0.3);
}

/* Hero */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}
.hero-section::before {
  content: '';
  position: absolute; top: -50%; left: -20%; width: 70%; height: 70%;
  background: radial-gradient(circle, rgba(14,165,233,0.15), transparent 70%);
  border-radius: 50%; filter: blur(60px);
}
.hero-container {
  display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: center; position: relative;
}
.hero-text h1 {
  font-size: 40px; line-height: 1.3; font-weight: 800; color: #f0f9ff; letter-spacing: -0.5px; margin-bottom: 20px;
  background: linear-gradient(120deg, #ffffff, #bae6fd 50%, #7dd3fc);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-desc {
  color: #a9c2d8; font-size: 16px; line-height: 1.9; margin-bottom: 30px; max-width: 90%;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 30px; border-radius: 10px; font-size: 15px; font-weight: 600;
  text-decoration: none; transition: all 0.3s ease; letter-spacing: 0.3px;
}
.btn-primary {
  background: linear-gradient(135deg, #0ea5e9, #1e3a5f);
  color: #fff; border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 4px 20px rgba(14,165,233,0.3);
}
.btn-primary:hover { box-shadow: 0 6px 30px rgba(14,165,233,0.5); transform: translateY(-2px); }
.btn-outline {
  border: 1px solid rgba(255,255,255,0.25); color: #e0f0ff; background: rgba(255,255,255,0.05);
}
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: rgba(14,165,233,0.5); transform: translateY(-2px); }
.hero-visual { text-align: center; }
.hero-img {
  max-width: 100%; border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  border: 1px solid rgba(255,255,255,0.1);
}

/* 数据统计 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { text-align: center; padding: 36px 20px; }
.stat-value {
  font-size: 44px; font-weight: 800;
  background: linear-gradient(135deg, #7dd3fc, #0ea5e9);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.2;
}
.stat-label { color: #8ba3b9; font-size: 14px; margin-top: 8px; font-weight: 500; }

/* 核心优势 */
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.advantage-card { padding: 32px 24px; position: relative; overflow: hidden; }
.advantage-card::after {
  content: ''; position: absolute; top: -40%; right: -40%; width: 100%; height: 100%;
  background: radial-gradient(circle, rgba(14,165,233,0.12), transparent 70%);
  border-radius: 50%;
}
.advantage-icon { font-size: 40px; margin-bottom: 16px; display: block; }
.advantage-card h3 { font-size: 18px; color: #e8f4ff; margin-bottom: 10px; font-weight: 700; }
.advantage-card p { color: #93adc2; font-size: 14px; line-height: 1.7; }

/* 品牌故事 */
.brand-story-section { background: linear-gradient(135deg, rgba(14,165,233,0.05), rgba(30,58,95,0.1)); }
.story-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.story-text h2 { font-size: 30px; color: #e8f4ff; margin-bottom: 20px; font-weight: 700; }
.story-text p { color: #a9c2d8; line-height: 1.9; margin-bottom: 16px; }
.story-img { width: 100%; border-radius: 20px; box-shadow: 0 20px 50px rgba(0,0,0,0.4); border: 1px solid rgba(255,255,255,0.1); }

/* 焦点赛事 */
.events-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.event-card { overflow: hidden; padding: 0; }
.event-img-wrap { height: 160px; overflow: hidden; position: relative; }
.event-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.event-body { padding: 24px; }
.event-body h3 { color: #e8f4ff; font-size: 18px; margin-bottom: 8px; }
.event-body p { color: #93adc2; font-size: 14px; line-height: 1.6; }
.event-time { display: inline-block; margin-top: 10px; color: #7dd3fc; font-size: 13px; font-weight: 500; }

/* 时间线 */
.timeline-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.timeline-item { text-align: center; padding: 28px 16px; }
.timeline-dot { width: 12px; height: 12px; background: #0ea5e9; border-radius: 50%; margin: 0 auto 12px; box-shadow: 0 0 20px rgba(14,165,233,0.8); }
.timeline-item h4 { color: #d8f0ff; font-size: 16px; margin-bottom: 8px; }
.timeline-item p { color: #7d98ad; font-size: 13px; line-height: 1.6; }

/* 服务覆盖 */
.coverage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.coverage-card { text-align: center; padding: 30px 20px; }
.coverage-icon { font-size: 42px; margin-bottom: 14px; }
.coverage-card h4 { color: #dcefff; font-size: 17px; margin-bottom: 6px; }
.coverage-card p { color: #7d98ad; font-size: 13px; }

/* 排行榜 */
.rankings-section { background: linear-gradient(160deg, rgba(14,165,233,0.08), transparent); }
.rankings-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.rank-list { list-style: none; }
.rank-list li { display: flex; align-items: center; padding: 14px 18px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.rank-list li:last-child { border-bottom: none; }
.rank-num {
  width: 30px; height: 30px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; background: rgba(14,165,233,0.15); color: #7dd3fc; margin-right: 14px;
}
.rank-team { flex: 1; color: #cfdeec; font-weight: 500; }
.rank-points { color: #7dd3fc; font-weight: 700; }
.rank-more { text-align: center; margin-top: 30px; }
.rank-more a { color: #7dd3fc; text-decoration: none; font-weight: 600; border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.rank-more a:hover { border-bottom-color: #7dd3fc; }

/* 新闻 */
.news-list-section { background: rgba(10, 20, 35, 0.3); }
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.news-card { padding: 28px; display: flex; flex-direction: column; }
.news-featured { grid-column: 1 / -1; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.news-tag {
  background: linear-gradient(135deg, #0ea5e9, #1e3a5f);
  color: #fff; font-size: 12px; padding: 3px 12px; border-radius: 20px; font-weight: 600; letter-spacing: 0.5px;
}
.news-date { color: #6c8ca6; font-size: 14px; font-weight: 500; }
.news-card h3 { font-size: 17px; line-height: 1.5; margin-bottom: 10px; }
.news-card h3 a { color: #e4f0fa; text-decoration: none; transition: color 0.2s; }
.news-card h3 a:hover { color: #7dd3fc; }
.news-card p { color: #8ca6ba; font-size: 14px; line-height: 1.75; margin-top: auto; }
.news-thumb { width: 100%; height: 140px; object-fit: cover; border-radius: 12px; margin-bottom: 14px; border: 1px solid rgba(255,255,255,0.05); }

/* 合作伙伴 */
.partners-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 30px; }
.partner-item { text-align: center; padding: 16px; flex: 0 0 140px; }
.partner-item img { width: 80px; height: 80px; object-fit: contain; margin-bottom: 8px; filter: grayscale(0.3); transition: filter 0.3s; }
.partner-item img:hover { filter: none; }
.partner-item span { display: block; color: #7d98ad; font-size: 13px; }

/* FAQ */
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: rgba(255,255,255,0.05); backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08); border-radius: 14px;
  margin-bottom: 16px; overflow: hidden; transition: border-color 0.3s;
}
.faq-item:hover { border-color: rgba(14,165,233,0.3); }
.faq-item summary {
  padding: 20px 24px; cursor: pointer; font-weight: 600; color: #dcecfa; font-size: 16px;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '＋'; color: #7dd3fc; font-size: 20px; font-weight: 400; transition: transform 0.3s; }
.faq-item[open] summary::after { content: '—'; }
.faq-item .faq-answer { padding: 0 24px 20px; color: #9cb6ca; line-height: 1.8; font-size: 14px; }

/* 下载中心 */
.app-download-section { background: linear-gradient(160deg, rgba(14,165,233,0.12), rgba(30,58,95,0.08)); }
.app-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.app-info h2 { font-size: 30px; color: #e8f4ff; margin-bottom: 16px; }
.app-info p { color: #a9c2d8; margin-bottom: 24px; line-height: 1.8; max-width: 90%; }
.download-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.app-img { width: 100%; max-width: 300px; border-radius: 24px; box-shadow: 0 20px 50px rgba(0,0,0,0.4); border: 1px solid rgba(255,255,255,0.1); }

/* CTA */
.cta-section { text-align: center; padding: 80px 0; position: relative; overflow: hidden; }
.cta-section::before {
  content: ''; position: absolute; bottom: -40%; left: 50%; transform: translateX(-50%);
  width: 80%; height: 80%;
  background: radial-gradient(circle, rgba(14,165,233,0.12), transparent 70%);
  border-radius: 50%; filter: blur(50px);
}
.cta-section h2 { font-size: 36px; color: #f0f9ff; margin-bottom: 16px; font-weight: 800; }
.cta-section p { color: #a9c2d8; max-width: 550px; margin: 0 auto 30px; font-size: 16px; line-height: 1.8; }
.cta-section .btn-lg { padding: 16px 42px; font-size: 17px; }

/* 页脚 */
.site-footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 60px 0 30px; background: rgba(5, 12, 24, 0.6);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand h3 { color: #dcecfa; font-size: 22px; margin-bottom: 12px; }
.footer-brand p { color: #6f8aa2; font-size: 14px; line-height: 1.7; max-width: 360px; }
.footer-col h4 { color: #b8d4e8; font-size: 16px; margin-bottom: 14px; }
.footer-col a { display: block; color: #6f8aa2; text-decoration: none; padding: 4px 0; font-size: 14px; transition: color 0.2s; }
.footer-col a:hover { color: #7dd3fc; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 24px; text-align: center; color: #55728c; font-size: 13px; line-height: 1.9;
}
.footer-bottom a { color: #6f8aa2; text-decoration: none; margin: 0 6px; }
.footer-bottom a:hover { color: #7dd3fc; }

/* 响应式 */
@media (max-width: 768px) {
  .hero-container, .story-layout, .rankings-layout, .app-layout { grid-template-columns: 1fr; }
  .stats-grid, .advantages-grid, .events-grid, .coverage-grid, .timeline-grid { grid-template-columns: 1fr 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 28px; }
  .section-header h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .stats-grid, .advantages-grid, .events-grid, .coverage-grid { grid-template-columns: 1fr; }
  .nav-links { gap: 6px; }
  .nav-links a { padding: 6px 12px; font-size: 13px; }
}