/* roulang page: index */
:root {
      --primary-deep: #0A1A3A;
      --primary-surface: #0F2445;
      --accent-gold: #C9A96E;
      --accent-gold-light: #E0C78A;
      --accent-blue: #3B82F6;
      --text-primary: #FFFFFF;
      --text-secondary: #E2E8F0;
      --text-muted: #CBD5E1;
      --text-footer: #94A3B8;
      --text-dark: #0A1A3A;
      --glass-bg: rgba(10, 26, 58, 0.65);
      --glass-border: rgba(201, 169, 110, 0.25);
      --glass-border-hover: rgba(201, 169, 110, 0.6);
      --card-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
      --shadow-glow: 0 0 24px rgba(201, 169, 110, 0.5);
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --sidebar-width: 240px;
      --transition: all 0.25s ease;
    }

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

    body {
      font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
      background: linear-gradient(145deg, #0A1A3A 0%, #0F2445 60%, #0A1A3A 100%);
      color: var(--text-secondary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      margin-left: var(--sidebar-width);
      transition: margin-left 0.3s ease;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button {
      font-family: inherit;
      cursor: pointer;
    }

    h1, h2, h3, h4 {
      color: var(--text-primary);
      font-weight: 700;
      letter-spacing: -0.01em;
    }

    h1 {
      font-size: clamp(2.6rem, 6vw, 3.6rem);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
    }

    h2 {
      font-size: clamp(2rem, 5vw, 2.5rem);
      font-weight: 700;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.6rem;
      font-weight: 600;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 40px;
    }

    /* 侧边栏导航 */
    .app-sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: var(--sidebar-width);
      height: 100vh;
      background: rgba(10, 26, 58, 0.9);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border-right: 1px solid rgba(201, 169, 110, 0.2);
      z-index: 1000;
      display: flex;
      flex-direction: column;
      padding: 32px 0 20px;
      transition: transform 0.3s ease;
    }

    .logo-area {
      padding: 0 24px 28px;
      border-bottom: 1px solid rgba(201, 169, 110, 0.3);
    }

    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--accent-gold);
      letter-spacing: 2px;
      line-height: 1.2;
    }

    .nav-menu {
      flex: 1;
      display: flex;
      flex-direction: column;
      padding: 24px 16px;
      gap: 6px;
    }

    .nav-item {
      padding: 14px 18px;
      border-radius: 10px;
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 1rem;
      transition: var(--transition);
      display: flex;
      align-items: center;
      border-left: 3px solid transparent;
    }

    .nav-item:hover {
      background: rgba(201, 169, 110, 0.1);
      color: var(--accent-gold);
    }

    .nav-item.active {
      background: rgba(201, 169, 110, 0.15);
      color: var(--accent-gold);
      border-left: 3px solid var(--accent-gold);
      font-weight: 600;
    }

    /* 移动端顶部导航 */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(10, 26, 58, 0.95);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 999;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      border-bottom: 1px solid rgba(201, 169, 110, 0.25);
    }

    .hamburger {
      font-size: 2rem;
      background: none;
      border: none;
      color: var(--accent-gold);
      width: 44px;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .drawer-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.6);
      z-index: 998;
    }

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

    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }

    .glass-card:hover {
      border-color: var(--glass-border-hover);
      box-shadow: 0 20px 40px rgba(0,0,0,0.6), 0 0 20px rgba(201,169,110,0.3);
      transform: translateY(-6px);
    }

    .btn-primary-glow {
      background: linear-gradient(135deg, #C9A96E, #E0C78A);
      color: #0A1A3A;
      font-weight: 700;
      border: none;
      padding: 14px 34px;
      border-radius: 40px;
      font-size: 1.1rem;
      letter-spacing: 0.5px;
      box-shadow: 0 0 20px rgba(201,169,110,0.55), 0 8px 18px rgba(0,0,0,0.4);
      transition: var(--transition);
      display: inline-block;
    }

    .btn-primary-glow:hover {
      box-shadow: 0 0 32px rgba(201,169,110,0.85), 0 12px 22px rgba(0,0,0,0.5);
      transform: scale(1.04);
      color: #0A1A3A;
    }

    .btn-outline-glow {
      background: transparent;
      border: 1.5px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 14px 34px;
      border-radius: 40px;
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-outline-glow:hover {
      background: rgba(201,169,110,0.15);
      border-color: #fff;
      color: #fff;
    }

    /* Hero */
    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
    }

    #hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(10,26,58,0.8) 40%, rgba(15,36,69,0.65) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }

    /* 优势非对称网格 */
    .advantages-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 28px;
    }

    .adv-card {
      padding: 32px 24px;
      display: flex;
      flex-direction: column;
    }

    .adv-card.large {
      grid-row: span 2;
    }

    /* 服务交替布局 */
    .service-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 70px;
    }

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

    .service-img {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
    }

    /* 价格卡片 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .price-card.featured {
      border: 1px solid var(--accent-gold);
      box-shadow: 0 0 30px rgba(201,169,110,0.45);
    }

    @media (max-width: 1024px) {
      body {
        margin-left: 0;
      }
      .app-sidebar {
        transform: translateX(-100%);
      }
      .app-sidebar.open {
        transform: translateX(0);
      }
      .mobile-header {
        display: flex;
      }
      .drawer-overlay.active {
        display: block;
      }
      section {
        padding: 70px 24px;
      }
      .advantages-grid {
        grid-template-columns: 1fr 1fr;
      }
      .pricing-grid {
        grid-template-columns: 1fr;
      }
      .service-row {
        flex-direction: column;
      }
    }

    @media (max-width: 768px) {
      .advantages-grid {
        grid-template-columns: 1fr;
      }
    }