/* roulang page: index */
:root {
      --primary: #0B1E33;
      --primary-light: #153357;
      --accent: #FF4D2E;
      --accent-hover: #E03A1A;
      --bg: #F4F6FA;
      --bg-alt: #E8ECF2;
      --white: #FFFFFF;
      --text: #1A2B3C;
      --text-soft: #5E6F82;
      --border: #DCE2E8;
      --radius: 16px;
      --radius-sm: 10px;
      --shadow: 0 4px 20px rgba(11,30,51,0.06);
      --shadow-hover: 0 12px 32px rgba(11,30,51,0.12);
      --transition: 0.25s ease-out;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', monospace;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img { display: block; max-width: 100%; height: auto; }
    a { text-decoration: none; color: inherit; }
    button, .btn { cursor: pointer; font-family: inherit; border: none; background: none; }
    .container { width: 90%; max-width: 1200px; margin: 0 auto; }
    
    /* 导航 */
    .header {
      position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
      background: rgba(11, 30, 51, 0.8); backdrop-filter: blur(14px);
      transition: background var(--transition);
    }
    .header.scrolled { background: rgba(11, 30, 51, 0.98); }
    .nav {
      display: flex; align-items: center; justify-content: space-between;
      height: 70px; color: white;
    }
    .logo {
      font-size: 22px; font-weight: 800; letter-spacing: 0.5px;
      display: flex; align-items: center; gap: 6px; color: white;
    }
    .logo i { color: var(--accent); font-size: 1.6rem; }
    .nav-links { display: flex; align-items: center; gap: 30px; }
    .nav-links a {
      font-weight: 500; font-size: 0.95rem; color: rgba(255,255,255,0.85);
      transition: color var(--transition);
    }
    .nav-links a:hover { color: #fff; }
    .nav-cta {
      background: var(--accent); color: white; font-weight: 600;
      padding: 10px 22px; border-radius: 40px; margin-left: 10px;
      transition: background var(--transition);
    }
    .nav-cta:hover { background: var(--accent-hover); }
    .mobile-toggle { display: none; font-size: 1.8rem; color: white; }
    /* 移动导航 */
    .mobile-nav {
      display: none; position: fixed; bottom: 0; left: 0; width: 100%;
      background: rgba(11,30,51,0.98); backdrop-filter: blur(20px);
      padding: 8px 16px; justify-content: space-around; align-items: center;
      z-index: 99; border-top-left-radius: 24px; border-top-right-radius: 24px;
    }
    .mobile-nav a { color: rgba(255,255,255,0.8); text-align: center; font-size: 0.7rem; display: flex; flex-direction: column; align-items: center; gap: 3px; transition: 0.2s; }
    .mobile-nav a i { font-size: 1.3rem; }
    .mobile-nav .center-cta { background: var(--accent); padding: 12px 20px; border-radius: 32px; color: white !important; font-weight: bold; margin-bottom: 8px; }
    
    /* Hero */
    .hero {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: white; padding: 140px 0 100px; position: relative; overflow: hidden;
    }
    .hero-wrap { display: flex; align-items: center; gap: 60px; flex-wrap: wrap; }
    .hero-left { flex: 1; }
    .hero h1 { font-size: 3.2rem; font-weight: 900; line-height: 1.2; margin-bottom: 18px; }
    .hero-sub { font-size: 1.15rem; opacity: 0.9; margin-bottom: 32px; max-width: 500px; }
    .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
    .btn-ghost {
      border: 2px solid rgba(255,255,255,0.7); color: white;
      padding: 12px 28px; border-radius: 40px; font-weight: 600; transition: 0.2s;
    }
    .btn-ghost:hover { background: white; color: var(--primary); }
    .btn-accent {
      background: var(--accent); color: white; padding: 12px 30px;
      border-radius: 40px; font-weight: 700; transition: background var(--transition);
    }
    .btn-accent:hover { background: var(--accent-hover); }
    .glass-card {
      background: rgba(255,255,255,0.12); backdrop-filter: blur(16px);
      border-radius: 20px; padding: 28px 30px; width: 340px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.3);
    }
    .score-row { display: flex; justify-content: space-between; align-items: center; font-family: var(--font-mono); }
    .team { font-size: 1.2rem; font-weight: 600; }
    .vs { font-size: 2rem; font-weight: 700; color: var(--accent); }
    .live-badge { background: var(--accent); padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; margin-left: 8px; }
    .timer { margin-top: 12px; font-family: var(--font-mono); color: #F0F6FF; }
    
    @media (max-width: 900px) {
      .hero-wrap { flex-direction: column; gap: 40px; }
      .glass-card { width: 100%; max-width: 400px; }
      .hero h1 { font-size: 2.5rem; }
    }
    
    /* 数据带 */
    .stats-strip { background: var(--white); padding: 45px 0; }
    .stats-grid { display: grid; grid-template-columns: repeat(4,1fr); text-align: center; gap: 24px; }
    .stat-num { font-family: var(--font-mono); font-size: 2.45rem; font-weight: 700; color: var(--accent); }
    .stat-label { color: var(--text-soft); margin-top: 5px; }
    
    /* 通用板块 */
    section { padding: 85px 0; }
    .section-title { font-size: 2.2rem; font-weight: 700; margin-bottom: 10px; }
    .section-sub { color: var(--text-soft); font-size: 1rem; margin-bottom: 48px; }
    
    /* 功能2x3大卡 */
    .features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
    .feat-card {
      background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow);
      padding: 0 0 22px; overflow: hidden; transition: all var(--transition);
    }
    .feat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border: 1px solid var(--accent); }
    .card-cover { width: 100%; height: 180px; object-fit: cover; }
    .card-content { padding: 20px 20px 10px; }
    .card-content h3 { font-size: 1.3rem; margin-bottom: 10px; display: flex; align-items: center; gap: 7px; }
    .card-content p { color: var(--text-soft); font-size: 0.9rem; }
    
    /* 场景卡 */
    .scene-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
    .scene-card { text-align: center; background: var(--white); border-radius: 24px; padding: 32px 16px; border: 1px solid transparent; transition: 0.2s; }
    .scene-card:hover { border-color: var(--accent); }
    .scene-avatar { width: 90px; height: 90px; border-radius: 50%; object-fit: cover; margin: 0 auto 15px; }
    
    /* 客户案例 */
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
    .case-card { background: white; border-radius: var(--radius); padding: 26px; display: flex; gap: 18px; align-items: center; box-shadow: var(--shadow); }
    .case-logo img { width: 65px; border-radius: 12px; }
    .data-rise { color: var(--accent); font-weight: 800; font-size: 1.4rem; }
    
    /* 价格 */
    .pricing-grid { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
    .price-card {
      background: white; border-radius: 20px; padding: 35px 25px; flex: 1; min-width: 220px;
      box-shadow: var(--shadow); position: relative; transition: 0.2s;
    }
    .price-card.popular { border: 2px solid var(--accent); }
    .badge { position: absolute; top: -14px; right: 20px; background: var(--accent); color: white; padding: 4px 16px; border-radius: 20px; font-size: 0.8rem; }
    .price { font-family: var(--font-mono); font-size: 2.4rem; font-weight: 700; }
    
    /* FAQ */
    .faq-item { background: white; border-radius: var(--radius-sm); margin-bottom: 12px; overflow: hidden; }
    .faq-question {
      background: white; padding: 18px 20px; font-weight: 600; display: flex; justify-content: space-between;
      align-items: center; cursor: pointer;
    }
    .faq-answer { max-height: 0; overflow: hidden; transition: 0.3s; padding: 0 20px; background: #f7f9fc; }
    .faq-item.active .faq-answer { max-height: 200px; padding: 15px 20px; }
    
    /* CTA */
    .final-cta {
      background: linear-gradient(135deg, var(--accent) 0%, #d4351a 100%);
      border-radius: 28px; padding: 70px 30px; text-align: center; color: white;
    }
    .btn-white { background: white; color: var(--accent); padding: 14px 38px; border-radius: 40px; font-weight: 700; display: inline-block; margin-top: 20px; }
    
    /* footer */
    .footer { background: var(--primary); color: #ccc; padding: 60px 0 30px; }
    .footer-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 30px; }
    .footer a { color: #bbb; display: block; margin: 4px 0; }
    
    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: 1fr 1fr; }
      .case-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-toggle { display: block; }
      .mobile-nav { display: flex; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
      .features-grid, .scene-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero h1 { font-size: 2rem; }
    }