/* roulang page: index */
:root {
      --bg-base: #060913;
      --bg-surface: #0A0F1D;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-card: rgba(255, 255, 255, 0.08);
      --primary-blue: #0066FF;
      --neon-cyan: #00F0FF;
      --accent-green: #10B981;
      --accent-orange: #F59E0B;
      --text-white: #FFFFFF;
      --text-muted: #94A3B8;
      --text-sub: #64748B;
      --shadow-glow: 0 0 24px rgba(0, 102, 255, 0.35);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
      background-color: var(--bg-base);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(0, 102, 255, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 65%, rgba(0, 240, 255, 0.08) 0%, transparent 45%);
      color: var(--text-white);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Top Bar */
    .top-bar {
      background: rgba(6, 9, 19, 0.85);
      border-bottom: 1px solid var(--border-card);
      font-size: 0.825rem;
      color: var(--text-sub);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .top-badge-list {
      display: flex;
      gap: 16px;
      align-items: center;
    }
    .top-badge-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .dot-online {
      width: 7px;
      height: 7px;
      background-color: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-green);
    }

    /* Main Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(10, 15, 29, 0.82);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border-card);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-white);
      letter-spacing: 0.5px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary-blue), var(--neon-cyan));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
      font-size: 1.1rem;
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--neon-cyan);
    }
    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: linear-gradient(135deg, var(--primary-blue), #0052cc);
      color: var(--text-white);
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-glow);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 28px rgba(0, 102, 255, 0.6);
    }

    /* Common Section Styles */
    section {
      padding: 85px 0;
      position: relative;
    }
    .section-alt {
      background: rgba(10, 15, 29, 0.45);
      border-top: 1px solid var(--border-card);
      border-bottom: 1px solid var(--border-card);
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 50px auto;
    }
    .section-tag {
      display: inline-block;
      padding: 5px 14px;
      font-size: 0.8rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.08);
      border: 1px solid rgba(0, 240, 255, 0.25);
      border-radius: 20px;
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 16px;
      color: var(--text-white);
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Glass Cards */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: rgba(0, 240, 255, 0.3);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    }

    /* Grid utilities */
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

    /* 1. Hero Section */
    .hero-section {
      padding: 90px 0 110px 0;
      background: linear-gradient(180deg, rgba(6,9,19,0.4) 0%, rgba(10,15,29,0.9) 100%), url('/assets/images/e900d6b50c642d9d.jpg') center/cover no-repeat;
      position: relative;
      border-bottom: 1px solid var(--border-card);
    }
    .hero-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at center, rgba(6,9,19,0.7) 0%, #060913 90%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-title {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 22px;
      background: linear-gradient(135deg, #FFFFFF 30%, var(--neon-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 34px;
    }
    .hero-badge-row {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 36px;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-card);
      border-radius: 30px;
      font-size: 0.88rem;
      color: #E2E8F0;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
    }
    .btn-primary-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 34px;
      background: linear-gradient(135deg, var(--primary-blue), #004ecc);
      color: var(--text-white);
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-glow);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    .btn-primary-glow:hover {
      background: linear-gradient(135deg, #1a75ff, var(--primary-blue));
      box-shadow: 0 0 32px rgba(0, 102, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-secondary-glass {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 30px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-card);
      color: var(--text-white);
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
    }
    .btn-secondary-glass:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.25);
    }

    /* 2. Pain Points */
    .pain-card {
      background: rgba(20, 14, 24, 0.65);
      border: 1px solid rgba(239, 68, 68, 0.18);
    }
    .pain-card:hover {
      border-color: rgba(239, 68, 68, 0.4);
    }
    .pain-tag {
      color: #F87171;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .pain-title {
      font-size: 1.2rem;
      margin-bottom: 12px;
      color: #FEE2E2;
    }
    .pain-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. Solution */
    .solution-item {
      display: flex;
      align-items: center;
      gap: 40px;
      margin-bottom: 50px;
    }
    .solution-item:last-child {
      margin-bottom: 0;
    }
    .solution-item.reverse {
      flex-direction: row-reverse;
    }
    .solution-text {
      flex: 1;
    }
    .solution-img-box {
      flex: 1;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-card);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }
    .solution-img-box img {
      width: 100%;
      height: 320px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .solution-img-box:hover img {
      transform: scale(1.04);
    }
    .solution-metric-tag {
      display: inline-block;
      padding: 4px 10px;
      background: rgba(0, 102, 255, 0.15);
      border: 1px solid rgba(0, 102, 255, 0.35);
      color: var(--neon-cyan);
      border-radius: 4px;
      font-size: 0.85rem;
      margin-top: 14px;
    }

    /* 4. Features Grid */
    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(0, 102, 255, 0.12);
      border: 1px solid rgba(0, 102, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: var(--neon-cyan);
      margin-bottom: 18px;
    }
    .feature-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
      color: var(--text-white);
    }
    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 5. Scenarios */
    .scenario-card {
      padding: 0;
      overflow: hidden;
    }
    .scenario-img-wrap {
      height: 190px;
      overflow: hidden;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .scenario-card:hover .scenario-img-wrap img {
      transform: scale(1.06);
    }
    .scenario-body {
      padding: 24px;
    }
    .scenario-body h3 {
      font-size: 1.2rem;
      margin-bottom: 10px;
    }
    .scenario-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 6. Workflow */
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .workflow-step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      text-align: center;
      position: relative;
    }
    .workflow-num {
      width: 38px;
      height: 38px;
      line-height: 38px;
      background: linear-gradient(135deg, var(--primary-blue), var(--neon-cyan));
      border-radius: 50%;
      margin: 0 auto 16px auto;
      font-weight: 700;
      color: #000;
      font-size: 1rem;
    }
    .workflow-step-card h3 {
      font-size: 1.1rem;
      margin-bottom: 10px;
    }
    .workflow-step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 7. Cases */
    .case-box {
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 30px;
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 30px;
      align-items: center;
    }
    .case-stats-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }
    .case-stat-item {
      background: rgba(0, 0, 0, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.05);
      padding: 16px;
      border-radius: var(--radius-sm);
      text-align: center;
    }
    .case-stat-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent-green);
      margin-bottom: 4px;
    }
    .case-stat-label {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 8. Metrics Bar */
    .metrics-bar {
      background: linear-gradient(90deg, rgba(0, 102, 255, 0.15) 0%, rgba(0, 240, 255, 0.08) 100%);
      border-top: 1px solid rgba(0, 240, 255, 0.2);
      border-bottom: 1px solid rgba(0, 240, 255, 0.2);
      padding: 45px 0;
    }
    .metric-col {
      text-align: center;
    }
    .metric-value {
      font-size: 2.6rem;
      font-weight: 800;
      color: #FFFFFF;
      background: linear-gradient(135deg, #FFFFFF, var(--neon-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      letter-spacing: 0.5px;
    }

    /* 9. Stories */
    .story-layout {
      display: grid;
      grid-template-columns: 1fr 1.3fr;
      gap: 35px;
      align-items: center;
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      padding: 35px;
    }
    .story-img {
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 280px;
    }
    .story-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-quote {
      font-size: 1.05rem;
      color: #E2E8F0;
      line-height: 1.7;
      margin-bottom: 18px;
      position: relative;
    }
    .story-author {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--neon-cyan);
    }
    .story-role {
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    /* 10. Testimonials */
    .testimonial-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-stars {
      color: var(--accent-orange);
      font-size: 1rem;
      margin-bottom: 14px;
    }
    .testimonial-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 14px;
    }
    .user-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #1E293B, #334155);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--neon-cyan);
      border: 1px solid var(--border-card);
    }
    .user-name {
      font-size: 0.95rem;
      font-weight: 600;
    }
    .user-tag {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* 11. Insights */
    .insight-card {
      padding: 0;
      overflow: hidden;
    }
    .insight-img-wrap {
      height: 160px;
      overflow: hidden;
    }
    .insight-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .insight-body {
      padding: 22px;
    }
    .insight-date {
      font-size: 0.8rem;
      color: var(--text-sub);
      margin-bottom: 8px;
    }
    .insight-title {
      font-size: 1.1rem;
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .insight-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
      margin-bottom: 16px;
    }
    .insight-link {
      font-size: 0.88rem;
      color: var(--neon-cyan);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 12. FAQ */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-sm);
      padding: 20px 24px;
    }
    .faq-question {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-white);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .faq-question::before {
      content: 'Q';
      display: inline-block;
      width: 22px;
      height: 22px;
      line-height: 22px;
      text-align: center;
      background: rgba(0, 102, 255, 0.2);
      color: var(--neon-cyan);
      border-radius: 4px;
      font-size: 0.8rem;
    }
    .faq-answer {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      padding-left: 30px;
    }

    /* 13. Bottom CTA & Form */
    .cta-wrapper {
      background: radial-gradient(circle at center, rgba(0, 102, 255, 0.22) 0%, rgba(10, 15, 29, 0.95) 75%);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 40px;
      align-items: center;
      box-shadow: 0 0 50px rgba(0, 102, 255, 0.2);
    }
    .cta-form-box {
      background: rgba(6, 9, 19, 0.75);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 30px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-sm);
      color: var(--text-white);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--neon-cyan);
    }
    .btn-form-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--primary-blue), #0052cc);
      color: var(--text-white);
      font-size: 1rem;
      font-weight: 600;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: var(--shadow-glow);
      transition: all 0.25s;
    }
    .btn-form-submit:hover {
      background: linear-gradient(135deg, #1a75ff, var(--primary-blue));
      box-shadow: 0 0 30px rgba(0, 102, 255, 0.6);
    }

    /* Footer */
    .site-footer {
      background: #03050A;
      border-top: 1px solid var(--border-card);
      padding: 65px 0 30px 0;
      color: var(--text-sub);
      font-size: 0.88rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-title {
      font-size: 1rem;
      color: var(--text-white);
      margin-bottom: 18px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--neon-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 25px;
      text-align: center;
      font-size: 0.82rem;
      color: var(--text-sub);
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .workflow-grid { grid-template-columns: repeat(2, 1fr); }
      .case-box { grid-template-columns: 1fr; }
      .story-layout { grid-template-columns: 1fr; }
      .cta-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-menu { display: none; }
      .hero-title { font-size: 2.2rem; }
      .section-title { font-size: 1.65rem; }
      .grid-2, .grid-3, .grid-4, .workflow-grid { grid-template-columns: 1fr; }
      .solution-item, .solution-item.reverse { flex-direction: column; }
      .metrics-bar .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 20px; }
      .footer-grid { grid-template-columns: 1fr; gap: 30px; }
      .cta-wrapper { padding: 30px 20px; }
    }