/* roulang page: index */
:root {
      --primary: #0A5C6F;
      --primary-dark: #06252D;
      --primary-light: #E6F3F5;
      --secondary: #10B981;
      --secondary-hover: #059669;
      --bg-light: #F8FAFB;
      --card-bg: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 20px -2px rgba(10, 92, 111, 0.05);
      --shadow-lg: 0 12px 30px -4px rgba(10, 92, 111, 0.12);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.75;
      font-size: 15px;
      scroll-behavior: smooth;
    }

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

    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-color: var(--primary-dark);
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-info span {
      margin-right: 20px;
    }
    .top-bar-badge {
      background-color: rgba(16, 185, 129, 0.2);
      color: var(--secondary);
      padding: 2px 8px;
      border-radius: var(--radius-sm);
    }

    /* Sticky Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 15px rgba(0,0,0,0.05);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
    }
    .brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 28px;
      align-items: center;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-main);
      transition: var(--transition);
      font-size: 15px;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .btn-nav {
      background-color: var(--primary);
      color: #fff;
      padding: 9px 20px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 14px;
      transition: var(--transition);
    }
    .btn-nav:hover {
      background-color: #084c5c;
      box-shadow: 0 4px 12px rgba(10, 92, 111, 0.3);
    }

    /* Sections Common */
    section {
      padding: clamp(60px, 7vw, 90px) 0;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }
    .section-tag {
      display: inline-block;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 4px 14px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: clamp(24px, 3.5vw, 34px);
      color: var(--primary-dark);
      line-height: 1.35;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 16px;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 15px;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #fff;
      box-shadow: 0 4px 14px rgba(10, 92, 111, 0.25);
    }
    .btn-primary:hover {
      background-color: #084c5c;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(10, 92, 111, 0.35);
    }
    .btn-outline {
      background-color: transparent;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background-color: var(--primary-light);
      transform: translateY(-2px);
    }

    /* 1. Hero Developer / Carousel Hybrid */
    .hero-section {
      background: linear-gradient(rgba(6, 37, 45, 0.88), rgba(6, 37, 45, 0.92)), url('/assets/images/13da0e85c6557a59.webp') center/cover no-repeat;
      color: #fff;
      padding: clamp(70px, 9vw, 110px) 0;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: clamp(30px, 4.5vw, 46px);
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
      color: #FFFFFF;
    }
    .hero-desc {
      font-size: 16px;
      color: #CBD5E1;
      margin-bottom: 32px;
      line-height: 1.8;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .hero-badges {
      display: flex;
      gap: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 24px;
    }
    .hero-badge-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: #E2E8F0;
    }
    .hero-badge-item svg {
      color: var(--secondary);
      flex-shrink: 0;
    }
    .code-console {
      background: #0B1924;
      border-radius: var(--radius-md);
      border: 1px solid #1E3A4C;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    }
    .console-header {
      background: #07121B;
      padding: 12px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #1E3A4C;
    }
    .console-dots {
      display: flex;
      gap: 6px;
    }
    .console-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .dot-red { background: #EF4444; }
    .dot-yellow { background: #F59E0B; }
    .dot-green { background: #10B981; }
    .console-title {
      font-size: 12px;
      color: #94A3B8;
      font-family: monospace;
    }
    .console-body {
      padding: 20px;
      font-family: Consolas, Monaco, "Courier New", monospace;
      font-size: 13px;
      line-height: 1.7;
      color: #38BDF8;
    }
    .console-body .token-key { color: #F472B6; }
    .console-body .token-str { color: #34D399; }
    .console-body .token-num { color: #FBBF24; }

    /* 2. Pain Points */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #F87171;
    }
    .pain-icon-wrap {
      width: 44px;
      height: 44px;
      background: #FEE2E2;
      color: #EF4444;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }
    .pain-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }
    .pain-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .pain-solution {
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
      background: var(--primary-light);
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    /* 3. Brand & Solution Overview */
    .solution-overview {
      background-color: #fff;
    }
    .solution-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .solution-img-box {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .solution-badge {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background: rgba(6, 37, 45, 0.9);
      color: #fff;
      padding: 12px 20px;
      border-radius: var(--radius-md);
      font-size: 13px;
      backdrop-filter: blur(8px);
    }
    .solution-steps-list {
      list-style: none;
      margin-top: 24px;
    }
    .solution-step-item {
      display: flex;
      gap: 16px;
      margin-bottom: 20px;
    }
    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    /* 4. Core Advantages */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .advantage-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
    }
    .advantage-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .adv-icon {
      width: 50px;
      height: 50px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .advantage-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--primary-dark);
    }
    .advantage-card p {
      color: var(--text-muted);
      font-size: 14px;
      margin-bottom: 16px;
    }
    .adv-tag {
      display: inline-block;
      font-size: 12px;
      background: #F1F5F9;
      color: #475569;
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 5. Featured Services */
    .services-bg {
      background-color: #fff;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      align-items: stretch;
    }
    .service-card {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .service-card.highlight {
      background: #FFFFFF;
      border: 2px solid var(--primary);
      box-shadow: 0 16px 36px rgba(10, 92, 111, 0.12);
      transform: scale(1.03);
      z-index: 2;
    }
    .service-badge-top {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--secondary);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 16px;
      border-radius: var(--radius-full);
      letter-spacing: 0.5px;
    }
    .service-name {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }
    .service-scene {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .service-list {
      list-style: none;
      margin-bottom: 30px;
      flex-grow: 1;
    }
    .service-list li {
      margin-bottom: 12px;
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .service-list svg {
      color: var(--secondary);
      flex-shrink: 0;
    }

    /* 6. Methodology & Steps */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
      margin-top: 40px;
    }
    .timeline-steps::before {
      content: '';
      position: absolute;
      top: 24px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: var(--border-color);
      z-index: 1;
    }
    .step-box {
      position: relative;
      z-index: 2;
      text-align: center;
      background: var(--card-bg);
      padding: 30px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .step-badge-circle {
      width: 48px;
      height: 48px;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 18px;
      margin: 0 auto 16px auto;
      border: 4px solid #fff;
      box-shadow: 0 0 0 2px var(--primary);
    }
    .step-box h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }
    .step-box p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 7. Dark Philosophy & Tech */
    .dark-tech-section {
      background-color: var(--primary-dark);
      color: #fff;
    }
    .dark-tech-section .section-title {
      color: #fff;
    }
    .dark-tech-section .section-desc {
      color: #94A3B8;
    }
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .tech-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
    }
    .tech-card:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--secondary);
    }
    .tech-card h3 {
      font-size: 18px;
      margin-bottom: 12px;
      color: #F8FAFC;
    }
    .tech-card p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 8. Case Studies */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .case-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 30px;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 24px;
      box-shadow: var(--shadow-sm);
    }
    .case-side-data {
      background: var(--bg-light);
      padding: 20px;
      border-radius: var(--radius-sm);
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .case-tag {
      font-size: 12px;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 8px;
      display: block;
    }
    .case-metric-box {
      margin-top: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }
    .metric-row {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      margin-bottom: 6px;
    }
    .case-narrative h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 10px;
    }
    .case-narrative p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 9. Key Metrics Bar */
    .metrics-bar-section {
      background: linear-gradient(135deg, var(--primary), #084351);
      color: #fff;
      padding: 50px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .metric-item-num {
      font-size: clamp(32px, 4vw, 44px);
      font-weight: 800;
      color: #fff;
      line-height: 1.1;
      margin-bottom: 6px;
      font-feature-settings: "tnum";
    }
    .metric-item-title {
      font-size: 15px;
      color: #A7F3D0;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .metric-item-desc {
      font-size: 12px;
      color: #CBD5E1;
    }

    /* 10. Testimonials */
    .testimonials-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;
      box-shadow: var(--shadow-sm);
    }
    .testi-stars {
      color: #F59E0B;
      margin-bottom: 14px;
    }
    .testi-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testi-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .testi-info h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--primary-dark);
    }
    .testi-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 11. Target Audience & Scenarios */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .scenario-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .scenario-img-wrap {
      height: 160px;
      overflow: hidden;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .scenario-card:hover .scenario-img-wrap img {
      transform: scale(1.05);
    }
    .scenario-content {
      padding: 20px;
    }
    .scenario-content h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }
    .scenario-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 12. News & Insights */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
    }
    .news-cover {
      height: 180px;
      overflow: hidden;
    }
    .news-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 12px;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .news-body h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .news-link {
      font-size: 14px;
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 13. FAQ Accordion */
    .faq-wrapper {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-item details summary {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--primary-dark);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-item details summary::-webkit-details-marker {
      display: none;
    }
    .faq-item details summary::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
      font-weight: 400;
      transition: transform 0.2s;
    }
    .faq-item details[open] summary::after {
      content: '−';
    }
    .faq-item-content {
      padding: 0 24px 24px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 14. Final CTA Banner */
    .cta-banner {
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
      border-radius: var(--radius-lg);
      padding: clamp(40px, 6vw, 60px);
      color: #fff;
      box-shadow: var(--shadow-lg);
    }
    .cta-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .cta-text h2 {
      font-size: clamp(24px, 3.5vw, 36px);
      font-weight: 800;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .cta-text p {
      font-size: 15px;
      color: #CBD5E1;
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .cta-form {
      background: #FFFFFF;
      padding: 30px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(10, 92, 111, 0.1);
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      background: var(--secondary);
      color: #fff;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-submit:hover {
      background: var(--secondary-hover);
    }

    /* Footer */
    .site-footer {
      background-color: var(--primary-dark);
      color: #94A3B8;
      padding: 70px 0 30px 0;
      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: #F8FAFC;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      transition: var(--transition);
    }
    .footer-links a:hover {
      color: #fff;
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 25px;
      text-align: center;
      font-size: 13px;
    }
    .footer-bottom p {
      margin-bottom: 8px;
    }

    /* Mobile Toggle */
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary-dark);
      cursor: pointer;
      padding: 8px;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-grid, .cta-grid {
        grid-template-columns: 1fr;
      }
      .pain-grid, .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .advantages-grid, .services-grid, .tech-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-steps::before {
        display: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        display: none;
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .pain-grid, .advantages-grid, .services-grid, .tech-grid, .testimonials-grid, .scenarios-grid, .news-grid, .footer-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .solution-grid {
        grid-template-columns: 1fr;
      }
      .case-card {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-steps {
        grid-template-columns: 1fr;
      }
    }