/* roulang page: index */
:root {
      --primary-blue: #1E40AF;
      --primary-blue-hover: #172554;
      --accent-cyan: #0284C7;
      --accent-orange: #F97316;
      --accent-orange-hover: #EA580C;
      --bg-slate: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-sub: #64748B;
      --border-color: #E2E8F0;
      --shadow-base: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 28px -4px rgba(15, 23, 42, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-muted);
      background-color: var(--bg-slate);
      line-height: 1.6;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-main);
      font-weight: 700;
      line-height: 1.3;
    }

    a {
      text-decoration: none;
      transition: all 0.25s ease;
    }

    .top-bar {
      height: 38px;
      background-color: #F1F5F9;
      font-size: 13px;
      color: var(--text-sub);
      border-bottom: 1px solid var(--border-color);
    }

    .main-navbar {
      position: sticky;
      top: 0;
      z-index: 1020;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 1px 10px rgba(0,0,0,0.06);
      transition: all 0.3s ease;
    }

    .navbar-brand {
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--primary-blue) !important;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .navbar-brand i {
      font-size: 1.5rem;
      color: var(--accent-orange);
    }

    .nav-link {
      font-weight: 500;
      color: var(--text-main) !important;
      padding: 0.5rem 1rem !important;
    }

    .nav-link:hover {
      color: var(--primary-blue) !important;
    }

    .btn-brand-primary {
      background-color: var(--primary-blue);
      color: #fff;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--primary-blue);
    }
    .btn-brand-primary:hover {
      background-color: var(--primary-blue-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-base);
    }

    .btn-brand-orange {
      background-color: var(--accent-orange);
      color: #fff;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--accent-orange);
    }
    .btn-brand-orange:hover {
      background-color: var(--accent-orange-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-base);
    }

    .content-section {
      padding: 85px 0;
      position: relative;
    }

    .content-section-alt {
      background-color: var(--bg-white);
    }

    .section-title-wrap {
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-blue);
      background-color: #DBEAFE;
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-sub);
      max-width: 820px;
      margin: 0 auto;
    }

    /* Hero 无大图 图标矩阵版式 */
    .hero-strip {
      background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
      color: #fff;
      padding: 70px 0 60px;
    }
    .hero-strip h1 {
      color: #fff;
      font-size: 2.6rem;
      margin-bottom: 20px;
    }
    .hero-lead {
      font-size: 1.15rem;
      line-height: 1.8;
      color: #CBD5E1;
      max-width: 860px;
      margin: 0 auto 35px;
    }
    .hero-icon-card {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 22px 18px;
      text-align: center;
      transition: all 0.3s ease;
    }
    .hero-icon-card:hover {
      background: rgba(255, 255, 255, 0.16);
      transform: translateY(-4px);
    }
    .hero-icon-card i {
      font-size: 28px;
      color: var(--accent-orange);
      margin-bottom: 12px;
    }
    .hero-icon-card h6 {
      color: #fff;
      font-size: 1rem;
      margin-bottom: 6px;
    }
    .hero-icon-card p {
      font-size: 0.85rem;
      color: #94A3B8;
      margin-bottom: 0;
    }

    /* 状态条 */
    .status-ribbon {
      background: #0284C7;
      color: #fff;
      padding: 12px 0;
      font-size: 0.95rem;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
    }

    /* 卡片通用 */
    .custom-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      transition: all 0.3s ease;
      height: 100%;
      overflow: hidden;
    }
    .custom-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: #CBD5E1;
    }

    /* 梯级优惠 */
    .tier-card {
      border: 2px solid transparent;
      padding: 30px;
      position: relative;
    }
    .tier-card.active {
      border-color: var(--accent-orange);
      background: #FFFAF5;
    }
    .tier-badge {
      position: absolute;
      top: 16px;
      right: 16px;
      background: var(--accent-orange);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
    }

    /* 套餐对比表格 */
    .table-compare {
      border-collapse: separate;
      border-spacing: 0;
      width: 100%;
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }
    .table-compare th, .table-compare td {
      padding: 18px 24px;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
    }
    .table-compare th:first-child, .table-compare td:first-child {
      text-align: left;
    }
    .table-compare th {
      background: #F1F5F9;
      color: var(--text-main);
      font-weight: 700;
    }

    /* 深色沉浸板 */
    .dark-section {
      background: var(--bg-dark);
      color: #F8FAFC;
    }
    .dark-section h2, .dark-section h3, .dark-section h4 {
      color: #FFFFFF;
    }
    .dark-section .section-desc {
      color: #94A3B8;
    }
    .dark-card {
      background: #1E293B;
      border: 1px solid #334155;
      color: #E2E8F0;
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
    }

    /* 时间线 */
    .workflow-step {
      position: relative;
      padding: 20px;
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
    }
    .workflow-num {
      width: 42px;
      height: 42px;
      line-height: 42px;
      text-align: center;
      background: var(--primary-blue);
      color: #fff;
      font-weight: 700;
      border-radius: 50%;
      font-size: 1.1rem;
      margin-bottom: 15px;
    }

    /* 评价墙 */
    .testimonial-card {
      padding: 24px;
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      height: 100%;
    }
    .testimonial-avatar {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-blue);
      font-weight: 700;
      font-size: 18px;
    }

    /* 保障图标条 */
    .guarantee-bar {
      background: #EFF6FF;
      border-top: 1px solid #BFDBFE;
      border-bottom: 1px solid #BFDBFE;
      padding: 35px 0;
    }

    /* FAQ 手风琴 */
    .accordion-button:not(.collapsed) {
      color: var(--primary-blue);
      background-color: #EFF6FF;
      box-shadow: none;
    }
    .accordion-item {
      border: 1px solid var(--border-color);
      margin-bottom: 12px;
      border-radius: var(--radius-sm) !important;
      overflow: hidden;
    }
    .accordion-button {
      font-weight: 600;
      padding: 18px 24px;
    }

    /* 页脚 */
    footer {
      background: #090D16;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid #1E293B;
      font-size: 14px;
    }
    footer a {
      color: #94A3B8;
    }
    footer a:hover {
      color: #FFFFFF;
    }
    .footer-title {
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    @media (max-width: 991px) {
      .section-title { font-size: 1.8rem; }
      .hero-strip h1 { font-size: 2.1rem; }
    }