/* roulang page: index */
:root {
      --primary: #0A2540;
      --accent: #00C49A;
      --accent-hover: #00A884;
      --bg: #F7F9FC;
      --white: #FFFFFF;
      --text: #1A1A1A;
      --text-soft: #5A6B7F;
      --border: #E9EDF2;
      --shadow-sm: 0 4px 12px rgba(10,37,64,0.06);
      --shadow-md: 0 8px 24px rgba(10,37,64,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --nav-height: 64px;
      --max-width: 1280px;
      --space-section: 80px;
      --space-md: 24px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      --font-number: "Inter", "Roboto", var(--font-sans);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    .number, .stat, .score, .timestamp {
      font-family: var(--font-number);
      font-weight: 500;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }

    .container {
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航 */
    .nav-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background: var(--white);
      border-bottom: 1px solid var(--border);
      z-index: 100;
      display: flex;
      align-items: center;
      box-shadow: 0 1px 4px rgba(0,0,0,0.02);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    .logo {
      font-size: 1.7rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      font-size: 1.8rem;
      color: var(--accent);
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      font-weight: 500;
      color: var(--primary);
    }
    .nav-links a {
      font-size: 0.95rem;
      padding: 0.4rem 0;
      border-bottom: 2px solid transparent;
      transition: border-color 0.2s, color 0.2s;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--accent);
      border-bottom-color: var(--accent);
    }

    .nav-cta {
      background: var(--accent);
      color: white;
      padding: 0.6rem 1.6rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      transition: background 0.2s;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: var(--accent-hover);
      color: white;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary);
      cursor: pointer;
    }

    /* 移动端底部胶囊导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--white);
      border-radius: 40px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.12);
      padding: 10px 18px;
      gap: 20px;
      z-index: 110;
      backdrop-filter: blur(10px);
      background: rgba(255,255,255,0.92);
    }

    /* Hero */
    .hero {
      padding: 120px 0 80px;
      background: linear-gradient(180deg, #F7F9FC 0%, #FFFFFF 100%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .hero-left h1 {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary);
      margin-bottom: 1.2rem;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-soft);
      margin-bottom: 2rem;
    }
    .btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .btn-primary {
      background: var(--accent);
      border: none;
      color: white;
      padding: 0 28px;
      height: 48px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: background 0.2s, transform 0.1s;
      min-width: 140px;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 0 28px;
      height: 48px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s;
    }
    .btn-secondary:hover {
      background: var(--primary);
      color: white;
    }

    .hero-right .dashboard-mock {
      background: var(--white);
      border-radius: 16px;
      padding: 20px;
      box-shadow: var(--shadow-md);
      display: flex;
      flex-direction: column;
      gap: 15px;
    }
    .live-score {
      display: flex;
      justify-content: space-between;
      font-weight: 700;
      font-size: 1.3rem;
      background: #F0F4FA;
      padding: 12px;
      border-radius: 10px;
    }
    .score-num {
      color: var(--accent);
    }

    /* 通用板块 */
    .section {
      padding: var(--space-section) 0;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 1rem;
      text-align: center;
    }
    .section-sub {
      color: var(--text-soft);
      text-align: center;
      max-width: 600px;
      margin: 0 auto 3rem auto;
    }

    /* 亮点网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--white);
      padding: var(--space-md);
      border-radius: var(--radius-card);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .feature-icon {
      font-size: 2rem;
      color: var(--accent);
      margin-bottom: 16px;
    }

    /* 实时快讯瀑布 */
    .news-stream {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .news-item {
      display: flex;
      gap: 20px;
      background: var(--white);
      padding: 16px;
      border-radius: var(--radius-card);
      border-left: 5px solid var(--accent);
      box-shadow: var(--shadow-sm);
    }
    .time-badge {
      font-weight: 600;
      color: var(--accent);
      min-width: 80px;
    }

    /* 对比表 */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 30px;
      align-items: center;
    }
    .plan-card {
      background: var(--white);
      padding: 32px 24px;
      border-radius: var(--radius-card);
      border: 1px solid var(--border);
    }
    .highlight {
      background: #E6FAF5;
    }
    .vs-circle {
      background: var(--primary);
      color: white;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.2rem;
    }

    /* 信任数字 */
    .stats-bar {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
    }
    .stat-item {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--accent);
    }

    /* FAQ */
    .faq-item {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
    }
    .faq-question {
      padding: 20px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      padding: 0 20px 20px;
      color: var(--text-soft);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    .cta-banner {
      background: var(--primary);
      border-radius: 20px;
      padding: 60px 30px;
      text-align: center;
      color: white;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .grid-3 { grid-template-columns: repeat(2,1fr); }
      .compare-grid { grid-template-columns: 1fr; }
      .vs-circle { margin: 10px auto; }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-cta { display: none; }
      .mobile-menu-toggle { display: block; }
      .mobile-bottom-nav { display: flex; }
      .grid-3 { grid-template-columns: 1fr; }
      .hero { padding: 100px 0 50px; }
      .hero-left h1 { font-size: 2rem; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }