/* roulang page: index */
:root {
      --primary: #0A0E27;
      --primary-hover: #1A2040;
      --gold: #C9A96E;
      --gold-metal: #D4AF37;
      --bg-warm: #F8F6F2;
      --text-dark: #1A1A1A;
      --text-soft: #4A4A4A;
      --white: #FFFFFF;
      --border-light: rgba(10,14,39,0.06);
      --shadow-sm: 0 4px 20px rgba(10,14,39,0.04);
      --shadow-md: 0 8px 30px rgba(10,14,39,0.08);
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-pill: 40px;
      --transition: 0.25s ease;
      --container-max: 1280px;
    }

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

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.7;
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      transition: var(--transition);
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(12px);
      z-index: 100;
      display: flex;
      align-items: center;
      border-bottom: 1px solid var(--border-light);
      transition: box-shadow 0.3s;
    }

    .site-header.scrolled {
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 800;
      font-size: 22px;
      color: var(--primary);
      letter-spacing: 0.5px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--primary);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--gold);
      font-size: 16px;
      font-weight: 700;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-soft);
      position: relative;
      padding: 4px 0;
      font-size: 15px;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--gold);
      transition: width 0.25s ease;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .mobile-bottom-nav {
      display: none;
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    /* Hero */
    #home {
      padding-top: 140px;
      min-height: 100vh;
      background: linear-gradient(135deg, rgba(10,14,39,0.88) 0%, rgba(10,14,39,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }

    .hero-content {
      max-width: 720px;
    }

    .hero-content h1 {
      font-size: 52px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      color: white;
    }

    .hero-content .gold-text {
      color: var(--gold);
    }

    .hero-sub {
      font-size: 20px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 40px;
      font-weight: 400;
    }

    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      border: 1px solid transparent;
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 8px 20px rgba(10,14,39,0.4);
      transform: scale(1.02);
    }

    .btn-outline {
      border: 1px solid var(--gold);
      color: var(--gold);
      padding: 14px 36px;
      border-radius: var(--pill);
      font-weight: 600;
      background: transparent;
    }

    .btn-outline:hover {
      background: var(--gold);
      color: var(--primary);
    }

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      animation: bounce 2s infinite;
      color: var(--gold);
      font-size: 24px;
    }

    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-10px); }
      60% { transform: translateX(-50%) translateY(-5px); }
    }

    /* 价值主张 */
    .value-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 40px;
      margin-top: 40px;
    }

    .value-item {
      background: var(--white);
      padding: 32px 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border-left: 3px solid var(--gold);
      transition: all 0.25s;
    }

    .value-item:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    .value-item h3 {
      font-size: 20px;
      margin: 16px 0 8px;
    }

    /* 功能分组 图文交替 */
    .feature-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }

    .feature-row.reverse {
      flex-direction: row-reverse;
    }

    .feature-text {
      flex: 1;
    }

    .feature-img {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .feature-img img {
      width: 100%;
      height: auto;
    }

    /* 场景卡片 横向滚动 */
    .scenarios-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: thin;
    }

    .scenario-card {
      min-width: 260px;
      background: white;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }

    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .scenario-card img {
      height: 160px;
      object-fit: cover;
    }

    .scenario-info {
      padding: 16px;
    }

    /* 案例数据卡 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }

    .stat-card {
      background: white;
      padding: 32px;
      border-radius: var(--radius-md);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .stat-number {
      font-size: 42px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }

    /* 价格卡片 */
    .pricing-grid {
      display: flex;
      gap: 24px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .price-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px;
      flex: 1 1 240px;
      max-width: 280px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }

    .price-card.featured {
      border: 2px solid var(--gold);
      position: relative;
    }

    .badge {
      background: var(--gold);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      right: 20px;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #E5E0D8;
      padding: 18px 0;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      font-size: 18px;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-soft);
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }

    /* CTA 页脚 */
    .footer-cta {
      background: var(--primary);
      color: white;
      text-align: center;
      padding: 80px 0;
    }

    .footer-bottom {
      background: #060914;
      color: rgba(255,255,255,0.6);
      padding: 24px 0;
      font-size: 14px;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(20px);
        border-top: 1px solid var(--border-light);
        justify-content: space-around;
        padding: 8px 0;
        z-index: 99;
      }
      .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 12px;
        color: var(--text-soft);
      }
      .value-grid, .stats-grid {
        grid-template-columns: 1fr;
      }
      .feature-row {
        flex-direction: column;
      }
      .feature-row.reverse {
        flex-direction: column;
      }
      h1 {
        font-size: 36px;
      }
    }