/* roulang page: index */
:root {
      --primary: #0EA5E9;
      --primary-hover: #0284C7;
      --secondary: #10B981;
      --secondary-dark: #059669;
      --accent-alert: #F43F5E;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-heading: #020617;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.85);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      --shadow-soft: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 28px -4px rgba(14, 165, 233, 0.15);
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      padding: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.75;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, h5, h6 {
      color: var(--text-heading);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 0.75rem;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-hover); }
    img { max-width: 100%; height: auto; display: block; }
    .site-container { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }
    .section-padding { padding: 90px 0; }
    .section-light { background-color: #FFFFFF; border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
    .section-soft { background-color: #F8FAFC; }
    .section-dark { background-color: var(--bg-dark); color: #F1F5F9; }
    .section-dark h2, .section-dark h3, .section-dark h4 { color: #FFFFFF; }
    .section-dark p { color: #94A3B8; }
    .sec-header { text-align: center; max-width: 820px; margin: 0 auto 50px auto; }
    .sec-header h2 { font-size: 2.15rem; margin-bottom: 1rem; }
    .sec-header p { font-size: 1.05rem; color: var(--text-muted); line-height: 1.8; margin: 0; }
    .sec-badge {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      background: rgba(14, 165, 233, 0.1);
      padding: 5px 14px;
      border-radius: var(--radius-pill);
      margin-bottom: 0.85rem;
      letter-spacing: 0.5px;
    }
    .top-notice-bar {
      background: #F1F5F9;
      border-bottom: 1px solid #E2E8F0;
      font-size: 0.82rem;
      color: var(--text-muted);
      padding: 7px 0;
    }
    .top-notice-bar .flex-row { display: flex; justify-content: space-between; align-items: center; }
    .notice-chip {
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      padding: 2px 10px;
      border-radius: var(--radius-pill);
      color: var(--text-body);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .notice-chip .dot { width: 6px; height: 6px; background-color: var(--secondary); border-radius: 50%; display: inline-block; }
    .main-header {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .navbar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-heading);
    }
    .brand-icon-box {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-size: 1.25rem;
    }
    .nav-links { display: flex; align-items: center; list-style: none; margin: 0; gap: 24px; }
    .nav-links a { color: var(--text-body); font-weight: 500; font-size: 0.95rem; }
    .nav-links a:hover { color: var(--primary); }
    .btn-brand {
      background: linear-gradient(135deg, var(--primary), #0284C7);
      color: #FFFFFF !important;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 0.92rem;
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-brand:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(14, 165, 233, 0.4); color: #FFF; }
    .btn-outline {
      background: transparent;
      color: var(--text-heading);
      border: 1px solid #CBD5E1;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 0.92rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(14, 165, 233, 0.04); }
    .hero-banner {
      position: relative;
      background: url('/assets/images/cf0efe576e34c39a.png') center center/cover no-repeat;
      padding: 110px 0 100px 0;
      overflow: hidden;
    }
    .hero-banner::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(2, 6, 23, 0.92) 0%, rgba(15, 23, 42, 0.85) 55%, rgba(15, 23, 42, 0.6) 100%);
    }
    .hero-content { position: relative; z-index: 2; max-width: 760px; color: #FFFFFF; }
    .hero-content h1 { font-size: 2.85rem; color: #FFFFFF; line-height: 1.25; margin-bottom: 1.25rem; }
    .hero-content p { font-size: 1.12rem; color: #CBD5E1; line-height: 1.85; margin-bottom: 2rem; }
    .hero-badge-group { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 1.75rem; }
    .hero-badge-item {
      background: rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #E2E8F0;
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      font-size: 0.85rem;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .hero-badge-item i { color: var(--secondary); }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
    .hero-actions .btn-outline { color: #FFF; border-color: rgba(255, 255, 255, 0.4); }
    .hero-actions .btn-outline:hover { background: rgba(255, 255, 255, 0.15); border-color: #FFF; color: #FFF; }
    .info-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 26px;
      height: 100%;
      box-shadow: var(--shadow-soft);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .info-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(14, 165, 233, 0.4);
    }
    .card-icon-round {
      width: 52px;
      height: 52px;
      background: rgba(14, 165, 233, 0.1);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      margin-bottom: 20px;
    }
    .info-card h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
    .info-card p { font-size: 0.95rem; color: var(--text-muted); margin: 0; line-height: 1.7; }
    .product-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .product-thumb { height: 210px; overflow: hidden; position: relative; background: #E2E8F0; }
    .product-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
    .product-card:hover .product-thumb img { transform: scale(1.05); }
    .product-body { padding: 24px; flex-grow: 1; display: flex; flex-direction: column; }
    .product-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--secondary-dark);
      background: rgba(16, 185, 129, 0.12);
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      align-self: flex-start;
      margin-bottom: 12px;
    }
    .product-body h3 { font-size: 1.22rem; margin-bottom: 10px; }
    .product-body p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 16px; line-height: 1.65; }
    .param-list { list-style: none; margin: auto 0 0 0; padding: 0; border-top: 1px solid #F1F5F9; padding-top: 14px; font-size: 0.85rem; color: var(--text-body); }
    .param-list li { display: flex; justify-content: space-between; margin-bottom: 6px; }
    .param-list li span:first-child { color: var(--text-muted); }
    .step-box {
      position: relative;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      height: 100%;
      box-shadow: var(--shadow-soft);
      transition: var(--transition);
    }
    .step-box:hover { border-color: var(--secondary); transform: translateY(-3px); }
    .step-num {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--secondary), #059669);
      color: #FFF;
      font-weight: 800;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }
    .case-panel {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      margin-bottom: 30px;
      box-shadow: var(--shadow-soft);
    }
    .case-img-wrap { height: 100%; min-height: 320px; }
    .case-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
    .case-content { padding: 40px 36px; display: flex; flex-direction: column; justify-content: center; height: 100%; }
    .metric-ribbon {
      background: linear-gradient(135deg, #047857 0%, #065F46 100%);
      color: #FFFFFF;
      padding: 60px 0;
    }
    .metric-item { text-align: center; padding: 10px 15px; }
    .metric-val { font-family: "Georgia", serif; font-size: 3.2rem; font-weight: 700; line-height: 1.1; margin-bottom: 8px; color: #6EE7B7; }
    .metric-lbl { font-size: 1rem; color: #D1FAE5; margin: 0; }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-soft);
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars { color: #F59E0B; margin-bottom: 14px; font-size: 0.95rem; }
    .review-text { font-size: 0.98rem; line-height: 1.8; color: var(--text-body); margin-bottom: 24px; font-style: normal; }
    .reviewer-meta { display: flex; align-items: center; gap: 14px; border-top: 1px solid #F1F5F9; padding-top: 16px; }
    .reviewer-avatar {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      font-size: 1.1rem;
    }
    .reviewer-name { font-weight: 700; color: var(--text-heading); font-size: 1rem; margin-bottom: 2px; }
    .reviewer-title { font-size: 0.82rem; color: var(--text-muted); }
    .pricing-table-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      height: 100%;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .pricing-table-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 10px 30px -4px rgba(14, 165, 233, 0.2);
    }
    .featured-tag {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary);
      color: #FFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 12px;
      border-radius: var(--radius-pill);
    }
    .pricing-name { font-size: 1.35rem; font-weight: 700; margin-bottom: 10px; }
    .pricing-desc { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 20px; }
    .pricing-points { list-style: none; margin: 0 0 30px 0; padding: 0; }
    .pricing-points li { margin-bottom: 12px; font-size: 0.92rem; display: flex; align-items: center; gap: 10px; }
    .pricing-points li i { color: var(--secondary); }
    .faq-accordion .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-accordion .accordion-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-heading);
      padding: 18px 24px;
      border: none;
      background: transparent;
      transition: var(--transition);
    }
    .faq-accordion .accordion-title:hover { color: var(--primary); background: #F8FAFC; }
    .faq-accordion .accordion-content {
      padding: 0 24px 22px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: none;
    }
    .trust-strip {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 30px 0;
    }
    .trust-item { display: flex; align-items: center; gap: 14px; }
    .trust-icon { font-size: 1.8rem; color: var(--primary); }
    .trust-txt h4 { font-size: 1rem; margin: 0; }
    .trust-txt p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
    .form-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 44px 38px;
      box-shadow: 0 10px 32px rgba(15, 23, 42, 0.06);
    }
    .form-group { margin-bottom: 20px; }
    .form-group label { display: block; font-size: 0.92rem; font-weight: 600; margin-bottom: 6px; color: var(--text-heading); }
    .form-control {
      width: 100%;
      height: 46px;
      border: 1px solid #CBD5E1;
      border-radius: var(--radius-sm);
      padding: 0 16px;
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15); }
    select.form-control { background-color: #FFF; }
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      padding: 70px 0 30px 0;
      border-top: 1px solid #1E293B;
      font-size: 0.92rem;
    }
    .site-footer h4 { color: #F1F5F9; font-size: 1.1rem; margin-bottom: 20px; }
    .footer-links { list-style: none; margin: 0; padding: 0; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a { color: #94A3B8; }
    .footer-links a:hover { color: #FFFFFF; }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      margin-top: 50px;
      padding-top: 25px;
      font-size: 0.85rem;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 15px;
    }
    @media (max-width: 1024px) {
      .hero-content h1 { font-size: 2.3rem; }
      .metric-val { font-size: 2.6rem; }
    }
    @media (max-width: 768px) {
      .navbar-inner { height: auto; padding: 15px 0; flex-direction: column; gap: 15px; }
      .nav-links { flex-wrap: wrap; justify-content: center; gap: 14px; }
      .hero-banner { padding: 70px 0 60px 0; }
      .hero-content h1 { font-size: 1.95rem; }
      .section-padding { padding: 60px 0; }
      .sec-header h2 { font-size: 1.7rem; }
      .form-panel { padding: 26px 20px; }
      .case-panel { margin-bottom: 24px; }
    }