:root {
  --primary: #D32F2F;       /* 主打红：高端、激情、财富 */
  --primary-dark: #B71C1C;  /* 深红：用于悬停 */
  --bg-dark: #0A0A0A;       /* 极致黑：高端感 */
  --bg-dark-light: #1A1A1A; /* 深灰黑：卡片背景 */
  --text-light: #E0E0E0;    /* 浅灰白：深色背景文字 */
  --text-dark: #1A1A1A;     /* 纯黑：浅色背景文字 */
  --text-gray: #757575;     /* 灰色：辅助文字 */
  --white: #FFFFFF;         /* 白色 */
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text-dark);
  line-height: 1.7;
  background-color: var(--white);
}
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ================= 顶部导航 ================= */
.site-header {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--primary);
  position: sticky; top: 0; z-index: 1000;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; gap: 20px; }
.logo { font-size: 24px; font-weight: 800; color: var(--bg-dark); display: flex; align-items: center; gap: 10px; }
.logo i { color: var(--primary); font-size: 26px; }
.main-nav { display: flex; gap: 4px; }
.main-nav a { display: flex; align-items: center; gap: 6px; padding: 10px 16px; border-radius: 8px; font-size: 15px; font-weight: 600; color: var(--text-dark); }
.main-nav a:hover, .main-nav a.active { color: var(--primary); background: #FFF5F5; }
.header-actions { display: flex; align-items: center; gap: 12px; position: relative; }
.qq-contact { position: absolute; top: 100%; right: 0; font-size: 13px; color: var(--text-gray); white-space: nowrap; padding-top: 6px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 24px; border-radius: 8px; font-size: 14px; font-weight: 600; transition: var(--transition); cursor: pointer; border: none; gap: 8px; }
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(211, 47, 47, 0.4); }
.btn-outline { border: 1px solid var(--bg-dark); color: var(--bg-dark); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: #FFF5F5; }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 10px; }
.menu-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--bg-dark); cursor: pointer; }

/* ================= 页面 Banner ================= */
.page-banner { background: var(--bg-dark); color: var(--white); padding: 80px 0 60px; text-align: center; position: relative; overflow: hidden; }
.page-banner::after { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--primary); }
.page-banner h1 { font-size: 42px; margin-bottom: 12px; letter-spacing: -1px; }
.page-banner p { font-size: 18px; color: var(--text-light); opacity: 0.8; }

/* ================= 高级 Hero 首屏（首页专用） ================= */
.hero-advanced { position: relative; background: var(--bg-dark); color: var(--white); padding: 100px 0 80px; overflow: hidden; }
.hero-advanced::before { content: ''; position: absolute; top: -50%; left: -20%; width: 800px; height: 800px; border-radius: 50%; background: radial-gradient(circle, rgba(211,47,47,0.2) 0%, transparent 70%); }
.hero-content { position: relative; z-index: 2; max-width: 700px; }
.hero-badge { display: inline-block; padding: 6px 16px; border-radius: 50px; background: rgba(211,47,47,0.2); border: 1px solid var(--primary); font-size: 13px; margin-bottom: 20px; color: var(--white); font-weight: 500; }
.hero-advanced h1 { font-size: 48px; line-height: 1.2; margin-bottom: 20px; }
.hero-advanced h1 span { color: var(--primary); }
.hero-advanced p { font-size: 18px; color: var(--text-light); margin-bottom: 36px; opacity: 0.9; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 50px; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); }
.hero-stat-item h3 { font-size: 32px; color: var(--primary); margin-bottom: 4px; }
.hero-stat-item p { font-size: 14px; color: var(--text-gray); }

/* ================= 行情滚动条 ================= */
.ticker-bar { background: var(--bg-dark-light); color: var(--text-light); padding: 12px 0; overflow: hidden; white-space: nowrap; border-bottom: 1px solid rgba(255,255,255,0.05); }
.ticker-content { display: inline-block; animation: ticker 30s linear infinite; }
.ticker-item { display: inline-flex; align-items: center; gap: 8px; margin-right: 40px; font-size: 14px; font-weight: 500; }
.ticker-item .up { color: #48BB78; }
.ticker-item .down { color: #F56565; }
@keyframes ticker { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ================= 通用区块与卡片 ================= */
.section { padding: 80px 0; }
.section-dark { background: var(--bg-dark); color: var(--white); }
.section-title { text-align: center; font-size: 32px; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px; }
.section-subtitle { text-align: center; color: var(--text-gray); font-size: 16px; margin-bottom: 50px; }
.section-dark .section-title { color: var(--white); }
.section-dark .section-subtitle { color: var(--text-light); opacity: 0.8; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.card { background: var(--white); border-radius: var(--border-radius); padding: 36px; transition: var(--transition); border: 1px solid #F0F0F0; box-shadow: 0 4px 20px rgba(0,0,0,0.03); }
.card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(211,47,47,0.08); border-color: rgba(211,47,47,0.2); }
.section-dark .card { background: var(--bg-dark-light); border-color: rgba(255,255,255,0.05); color: var(--white); }
.section-dark .card:hover { background: #222; border-color: var(--primary); }
.card i.card-icon { font-size: 36px; color: var(--primary); margin-bottom: 20px; display: inline-block; padding: 16px; background: #FFF5F5; border-radius: 12px; }
.section-dark .card i.card-icon { background: rgba(211,47,47,0.15); }
.card h3 { font-size: 20px; margin-bottom: 12px; }
.card p { color: var(--text-gray); font-size: 14px; }
.section-dark .card p { color: var(--text-light); opacity: 0.8; }

/* ================= 时间轴（关于我们） ================= */
.timeline { position: relative; max-width: 800px; margin: 0 auto; padding-left: 30px; border-left: 3px solid var(--primary); }
.timeline-item { position: relative; margin-bottom: 40px; }
.timeline-item::before { content: ''; position: absolute; left: -39px; top: 4px; width: 15px; height: 15px; border-radius: 50%; background: var(--white); border: 3px solid var(--primary); }
.timeline-item h4 { font-size: 20px; color: var(--primary); margin-bottom: 8px; }
.timeline-item p { color: var(--text-gray); font-size: 15px; }

/* ================= 表格美化 ================= */
.table-wrap { overflow-x: auto; border-radius: var(--border-radius); box-shadow: 0 4px 20px rgba(0,0,0,0.05); border: 1px solid #eee; }
table.data-table { width: 100%; border-collapse: collapse; background: var(--white); min-width: 600px; }
table.data-table th, table.data-table td { padding: 20px 24px; text-align: left; border-bottom: 1px solid #eee; }
table.data-table th { background: var(--bg-dark); color: var(--white); font-weight: 600; font-size: 14px; }
table.data-table td { font-size: 15px; }
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr:hover td { background: #FFF5F5; }

/* ================= 底部 CTA ================= */
.cta-section { background: var(--primary); color: var(--white); padding: 80px 0; text-align: center; border-radius: var(--border-radius); margin: 0 24px 80px; }
.cta-section h2 { font-size: 36px; margin-bottom: 16px; font-weight: 800; }
.cta-section p { font-size: 18px; opacity: 0.9; margin-bottom: 32px; }
.cta-section .btn-outline { border-color: var(--white); color: var(--white); }
.cta-section .btn-outline:hover { background: var(--white); color: var(--primary); }

/* ================= 页脚 ================= */
.site-footer { background: var(--bg-dark); color: var(--text-light); padding: 60px 0 0; border-top: 4px solid var(--primary); }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 40px; padding-bottom: 40px; }
.footer-col h4 { color: var(--white); font-size: 18px; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { color: var(--text-gray); font-size: 14px; }
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-col p { color: var(--text-gray); font-size: 14px; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); text-align: center; padding: 24px 0; font-size: 13px; color: var(--text-gray); }

/* ================= 手机端底部固定按钮 ================= */
.mobile-bottom-bar { display: none; }

/* ================= 响应式 ================= */
@media (max-width: 900px) {
  .main-nav { position: fixed; top: 80px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); display: none; border-bottom: 4px solid var(--primary); }
  .main-nav.open { display: flex; }
  .menu-toggle { display: block; }
  .header-actions .btn { display: none; }
  .qq-contact { position: static; padding-top: 0; text-align: right; }
  .header-inner { height: 70px; }
  .hero-advanced h1 { font-size: 32px; }
  .hero-advanced { padding: 60px 0 40px; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .section { padding: 50px 0; }
  .cta-section { margin: 0 16px 50px; padding: 50px 20px; }
  .cta-section h2 { font-size: 26px; }
  .mobile-bottom-bar { display: flex; position: fixed; bottom: 0; left: 0; right: 0; background: var(--white); box-shadow: 0 -2px 10px rgba(0,0,0,0.08); padding: 12px 16px; gap: 12px; z-index: 2000; }
  .mobile-bottom-bar .btn { flex: 1; text-align: center; }
  body { padding-bottom: 80px; }
  .timeline { padding-left: 20px; }
  .timeline-item::before { left: -29px; }
}