/* roulang page: index */
:root {
      --primary: #0F4C5C;
      --primary-hover: #0a3540;
      --accent: #2EC4B6;
      --accent-hover: #26a69a;
      --dark-block: #0B252C;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --bg-clean: #FFFFFF;
      --bg-tint: #F8FAFC;
      --border-color: #E2E8F0;
      --border-accent: rgba(46, 196, 182, 0.3);
      --shadow-sm: 0 2px 8px rgba(15, 76, 92, 0.04);
      --shadow-md: 0 4px 20px -2px rgba(15, 76, 92, 0.08);
      --shadow-lg: 0 12px 30px -4px rgba(15, 76, 92, 0.12);
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-family);
      color: var(--text-main);
      background-color: var(--bg-clean);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    ul, ol {
      list-style: none;
    }
    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      line-height: 1.2;
    }
    .btn-primary {
      background-color: var(--accent);
      color: #032b2f;
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(46, 196, 182, 0.35);
    }
    .btn-outline {
      background-color: transparent;
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-white {
      background-color: #FFFFFF;
      color: var(--primary);
    }
    .btn-white:hover {
      background-color: var(--bg-tint);
      color: var(--primary-hover);
    }
    .badge {
      display: inline-block;
      padding: 4px 12px;
      font-size: 13px;
      font-weight: 600;
      border-radius: 999px;
      background: rgba(46, 196, 182, 0.15);
      color: var(--primary);
      letter-spacing: 0.5px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: clamp(1.875rem, 3vw, 2.25rem);
      font-weight: 700;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 820px;
      margin-bottom: 40px;
    }
    .section-desc p {
      margin-bottom: 12px;
    }
    .section-head-center {
      text-align: center;
    }
    .section-head-center .section-desc {
      margin-left: auto;
      margin-right: auto;
    }
    .page-section {
      padding: 90px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .bg-tint {
      background-color: var(--bg-tint);
    }
    .bg-dark {
      background-color: var(--dark-block);
      color: #F8FAFC;
    }
    .bg-dark .section-title {
      color: #FFFFFF;
    }
    .bg-dark .section-desc {
      color: #94A3B8;
    }
    .bg-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }

    /* Top Bar */
    .top-bar {
      background-color: #081B20;
      color: #94A3B8;
      font-size: 13px;
      height: 38px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .top-bar-items span {
      margin-right: 20px;
    }
    .top-bar-items a {
      color: #CBD5E1;
    }

    /* Header Nav */
    .site-header {
      background-color: rgba(255, 255, 255, 0.98);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(15, 76, 92, 0.04);
      backdrop-filter: blur(8px);
    }
    .header-inner {
      height: 74px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-logo .logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-weight: 800;
      font-size: 20px;
    }
    .brand-logo .logo-text {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-logo .logo-text span {
      color: var(--accent);
      font-weight: 500;
      font-size: 14px;
      display: block;
      line-height: 1;
      margin-top: 3px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 6px 0;
      position: relative;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background-color: var(--accent);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }

    /* Section 1: Hero */
    .hero-profile {
      background: linear-gradient(135deg, #072228 0%, #0F4C5C 100%);
      color: #FFFFFF;
      padding: 80px 0 70px;
      position: relative;
      overflow: hidden;
    }
    .hero-profile::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image: url('/assets/images/f01fe1850922e5b5.png');
      background-size: cover;
      background-position: center;
      opacity: 0.16;
      pointer-events: none;
    }
    .hero-banner-inner {
      position: relative;
      z-index: 1;
    }
    .creator-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 24px 32px;
      margin-bottom: 40px;
      backdrop-filter: blur(10px);
    }
    .creator-info {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .creator-avatar {
      width: 68px;
      height: 68px;
      border-radius: 50%;
      border: 3px solid var(--accent);
      object-fit: cover;
      background: #FFFFFF;
    }
    .creator-text h2 {
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 4px;
    }
    .creator-text p {
      font-size: 14px;
      color: #94A3B8;
    }
    .creator-badges {
      display: flex;
      gap: 16px;
    }
    .creator-badge-item {
      text-align: center;
      padding: 0 16px;
      border-right: 1px solid rgba(255, 255, 255, 0.15);
    }
    .creator-badge-item:last-child {
      border-right: none;
    }
    .badge-number {
      font-size: 22px;
      font-weight: 700;
      color: var(--accent);
      display: block;
    }
    .badge-label {
      font-size: 12px;
      color: #CBD5E1;
    }
    .hero-content h1 {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      color: var(--accent);
    }
    .hero-intro {
      font-size: 17px;
      color: #E2E8F0;
      line-height: 1.8;
      max-width: 900px;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
      flex-wrap: wrap;
    }

    /* Section 2: Pain Points */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-top: 4px solid #E11D48;
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .pain-index {
      font-size: 24px;
      font-weight: 800;
      color: #E11D48;
      margin-bottom: 12px;
    }
    .pain-card h3 {
      font-size: 19px;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .pain-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .pain-solution {
      margin-top: 16px;
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
    }

    /* Section 3: Overview */
    .overview-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 50px;
      align-items: center;
    }
    .overview-img-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .overview-content p {
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.8;
    }
    .overview-list {
      margin-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .overview-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-sm);
    }
    .overview-item strong {
      display: block;
      color: var(--primary);
      font-size: 15px;
      margin-bottom: 4px;
    }
    .overview-item span {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Section 4: Capabilities */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      transition: all 0.3s ease;
      position: relative;
    }
    .feature-card:hover {
      border-color: var(--accent);
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .feature-icon-bar {
      width: 48px;
      height: 48px;
      background: rgba(46, 196, 182, 0.12);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      font-size: 18px;
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 18px;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 5: Matrix */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .matrix-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lg);
    }
    .matrix-tag {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 999px;
    }
    .matrix-card h3 {
      font-size: 22px;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .matrix-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 48px;
    }
    .matrix-specs {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      margin-bottom: 28px;
      flex-grow: 1;
    }
    .matrix-specs li {
      font-size: 14px;
      color: var(--text-main);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .matrix-specs li::before {
      content: "✓";
      color: var(--accent);
      font-weight: 800;
    }

    /* Section 6: Security */
    .sec-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 20px;
    }
    .sec-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 28px 22px;
    }
    .sec-card h3 {
      font-size: 18px;
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .sec-card p {
      font-size: 13.5px;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* Section 7: Process */
    .pipeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .pipe-step {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
      margin-bottom: 16px;
    }
    .pipe-step h3 {
      font-size: 17px;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .pipe-step p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 8: Metrics & Stories */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: var(--primary);
      color: #FFFFFF;
      padding: 40px;
      border-radius: var(--radius-lg);
      margin-bottom: 50px;
    }
    .metric-box {
      text-align: center;
      border-right: 1px solid rgba(255, 255, 255, 0.15);
    }
    .metric-box:last-child {
      border-right: none;
    }
    .metric-val {
      font-size: 38px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      color: #E2E8F0;
    }
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }
    .story-card h4 {
      font-size: 18px;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .story-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .story-tag {
      display: inline-block;
      font-size: 12px;
      color: var(--primary);
      background: rgba(15, 76, 92, 0.08);
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* Section 9: Testimonials */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .testi-quote {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-tint);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
    }
    .author-info h5 {
      font-size: 15px;
      color: var(--primary);
      margin-bottom: 2px;
    }
    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Section 10: News */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .news-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
    }
    .news-date {
      font-size: 12px;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .news-body h3 {
      font-size: 17px;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-body p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Section 11: FAQ */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      background: #FFFFFF;
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 16px;
      font-weight: 600;
      color: var(--primary);
      background: #FFFFFF;
    }
    .faq-toggle-icon {
      font-size: 18px;
      color: var(--accent);
      transition: transform 0.25s ease;
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.75;
      display: block;
      border-top: 1px solid transparent;
    }

    /* Section 12: Conversion Form */
    .cta-box-wrapper {
      background: linear-gradient(135deg, var(--dark-block) 0%, var(--primary) 100%);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .cta-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .cta-text h2 {
      font-size: clamp(1.8rem, 3vw, 2.4rem);
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .cta-text p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .form-group-wrap {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-input {
      width: 100%;
      padding: 13px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(255, 255, 255, 0.06);
      color: #FFFFFF;
      font-size: 14px;
      outline: none;
    }
    .form-input::placeholder {
      color: #94A3B8;
    }
    .form-input:focus {
      border-color: var(--accent);
      background: rgba(255, 255, 255, 0.12);
    }
    .form-notice {
      font-size: 12px;
      color: #94A3B8;
      text-align: center;
      margin-top: 10px;
    }

    /* Footer */
    .site-footer {
      background-color: #061519;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      margin-bottom: 18px;
    }
    .footer-col p {
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 25px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }
    .footer-trust-marks span {
      margin-right: 18px;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .pain-grid, .feature-grid, .matrix-grid, .testi-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .sec-grid, .pipeline-grid, .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .overview-grid, .cta-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .creator-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .pain-grid, .feature-grid, .matrix-grid, .testi-grid, .news-grid, .story-grid, .sec-grid, .pipeline-grid {
        grid-template-columns: 1fr;
      }
      .metrics-bar {
        grid-template-columns: 1fr;
        gap: 20px;
      }
      .metric-box {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.15);
        padding-bottom: 16px;
      }
      .metric-box:last-child {
        border-bottom: none;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }