/* roulang page: index */
:root {
      --primary: #1D2671;
      --primary-dark: #121848;
      --secondary: #C33764;
      --accent: #00F2FE;
      --accent-glow: rgba(0, 242, 254, 0.35);
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0B0F19;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      --shadow-sm: 0 4px 12px rgba(29, 38, 113, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(29, 38, 113, 0.08);
      --shadow-lg: 0 20px 40px -10px rgba(29, 38, 113, 0.16);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.6;
    }
    body {
      overflow-x: hidden;
      width: 100%;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* Header & Nav */
    .top-bar {
      background: var(--bg-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-items {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10B981;
      box-shadow: 0 0 8px #10B981;
      margin-right: 6px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 19px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      box-shadow: 0 4px 12px rgba(195, 55, 100, 0.3);
    }
    .logo-icon svg {
      width: 20px;
      height: 20px;
      fill: currentColor;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }
    .nav-item a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-item a:hover {
      color: var(--secondary);
      background: rgba(195, 55, 100, 0.06);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      border: none;
      transition: var(--transition);
      min-height: 46px;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #FFFFFF;
      box-shadow: 0 4px 16px rgba(29, 38, 113, 0.25);
    }
    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(195, 55, 100, 0.4);
      transform: translateY(-2px);
      color: #FFFFFF;
    }
    .btn-outline {
      background: #FFFFFF;
      color: var(--primary);
      border: 1.5px solid var(--border-color);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: rgba(29, 38, 113, 0.04);
      transform: translateY(-2px);
    }
    .btn-accent {
      background: var(--accent);
      color: var(--bg-dark);
      font-weight: 800;
      box-shadow: 0 4px 16px var(--accent-glow);
    }
    .btn-accent:hover {
      background: #25f4ff;
      transform: translateY(-2px);
    }
    /* Section Basics */
    .section-wrap {
      padding: 90px 0;
      position: relative;
    }
    .section-wrap.bg-white {
      background-color: var(--bg-white);
    }
    .section-wrap.bg-light {
      background-color: var(--bg-light);
    }
    .section-wrap.bg-dark {
      background-color: var(--bg-dark);
      color: #E2E8F0;
    }
    .section-header {
      margin-bottom: 54px;
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 16px;
      text-transform: uppercase;
    }
    .badge-primary {
      background: rgba(29, 38, 113, 0.08);
      color: var(--primary);
      border: 1px solid rgba(29, 38, 113, 0.15);
    }
    .badge-accent {
      background: rgba(0, 242, 254, 0.12);
      color: var(--accent);
      border: 1px solid rgba(0, 242, 254, 0.3);
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-wrap.bg-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .section-wrap.bg-dark .section-desc {
      color: #94A3B8;
    }
    /* Hero Section */
    .hero-banner {
      position: relative;
      background: radial-gradient(circle at 80% 20%, rgba(195, 55, 100, 0.18) 0%, transparent 50%),
                  radial-gradient(circle at 10% 80%, rgba(0, 242, 254, 0.12) 0%, transparent 40%),
                  linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 100px 0 80px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 22px;
      letter-spacing: -0.8px;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-p {
      font-size: 17px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-action-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 40px;
    }
    .hero-metrics-pill {
      display: flex;
      gap: 20px;
      padding: 14px 24px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      width: fit-content;
    }
    .pill-metric-item {
      display: flex;
      flex-direction: column;
    }
    .pill-metric-val {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
    }
    .pill-metric-lbl {
      font-size: 12px;
      color: var(--text-muted);
    }
    .hero-stage {
      position: relative;
    }
    .hero-stage-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      position: relative;
    }
    .hero-stage-card img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .hero-floating-badge {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 14px 20px;
      color: #FFFFFF;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    /* Section 2: Architecture */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .arch-preview {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }
    .arch-preview img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .arch-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }
    .arch-item {
      display: flex;
      gap: 16px;
      background: var(--bg-white);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .arch-item-num {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: rgba(29, 38, 113, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      flex-shrink: 0;
    }
    /* Section 3: Features 6-grid */
    .features-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-lg);
      padding: 36px 30px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(195, 55, 100, 0.3);
    }
    .feature-icon-box {
      width: 56px;
      height: 56px;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, rgba(29, 38, 113, 0.08) 0%, rgba(195, 55, 100, 0.12) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 22px;
      color: var(--primary);
    }
    .feature-icon-box svg {
      width: 28px;
      height: 28px;
      fill: currentColor;
    }
    .feature-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .feature-desc {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
    }
    /* Section 4: Products */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .product-box:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .product-meta-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin: 16px 0 20px 0;
    }
    .meta-tag {
      font-size: 12px;
      padding: 4px 10px;
      background: #F1F5F9;
      color: var(--primary);
      border-radius: 6px;
      font-weight: 600;
    }
    .product-specs {
      list-style: none;
      margin-bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .product-specs li {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-specs li::before {
      content: "✓";
      color: #10B981;
      font-weight: 800;
    }
    /* Section 5: Scenarios Tabs */
    .scenario-container {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .scenario-tabs {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      background: #F8FAFC;
      border-bottom: 1px solid var(--border-color);
    }
    .scenario-tab-btn {
      padding: 20px;
      border: none;
      background: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-muted);
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
      border-bottom: 3px solid transparent;
    }
    .scenario-tab-btn.active {
      color: var(--primary);
      background: #FFFFFF;
      border-bottom-color: var(--secondary);
    }
    .scenario-panel {
      padding: 40px;
      display: none;
      align-items: center;
      gap: 40px;
    }
    .scenario-panel.active {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
    }
    .scenario-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      height: 320px;
    }
    .scenario-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    /* Section 6: Dark Philosophy */
    .dark-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .dark-card {
      background: #141A28;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      transition: var(--transition);
    }
    .dark-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }
    .dark-card-val {
      font-size: 40px;
      font-weight: 900;
      color: var(--accent);
      margin-bottom: 8px;
      font-family: monospace;
    }
    .dark-card-title {
      font-size: 18px;
      color: #FFFFFF;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .dark-card-desc {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }
    /* Section 7: Case Stories */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .story-header {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 18px;
    }
    .story-badge {
      font-size: 12px;
      background: rgba(195, 55, 100, 0.1);
      color: var(--secondary);
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      font-weight: 700;
    }
    .story-stats {
      display: flex;
      gap: 24px;
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
    }
    .story-stat-num {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary);
    }
    .story-stat-txt {
      font-size: 12px;
      color: var(--text-muted);
    }
    /* Section 8: Metrics Banner */
    .metrics-bar-wrap {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      padding: 60px 0;
      color: #FFFFFF;
    }
    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-big-num {
      font-size: 46px;
      font-weight: 900;
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: monospace;
      color: var(--accent);
    }
    .metric-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .metric-note {
      font-size: 12px;
      opacity: 0.8;
    }
    /* Section 9: Testimonials */
    .testimonial-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-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 16px;
      margin-bottom: 14px;
    }
    .testi-quote {
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: italic;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }
    .testi-user-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .testi-user-role {
      font-size: 12px;
      color: var(--text-muted);
    }
    /* Section 10: Insights */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .insight-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .insight-img {
      height: 200px;
      overflow: hidden;
    }
    .insight-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .insight-card:hover .insight-img img {
      transform: scale(1.05);
    }
    .insight-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .insight-tag {
      font-size: 12px;
      color: var(--secondary);
      font-weight: 700;
      margin-bottom: 8px;
    }
    .insight-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .insight-foot {
      font-size: 12px;
      color: var(--text-muted);
      border-top: 1px solid #F1F5F9;
      padding-top: 12px;
    }
    /* Section 11: FAQ */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-header {
      padding: 20px 24px;
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-header:hover {
      background: #F8FAFC;
      color: var(--secondary);
    }
    .faq-icon {
      font-size: 20px;
      line-height: 1;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-body {
      padding: 0 24px 20px 24px;
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.75;
      display: none;
    }
    .faq-item.active .faq-body {
      display: block;
    }
    /* Section 12: Contact / SLA Guarantee */
    .contact-card-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr 1fr;
    }
    .sla-side {
      background: linear-gradient(145deg, #101633 0%, var(--primary) 100%);
      color: #FFFFFF;
      padding: 50px 40px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .sla-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin: 30px 0;
    }
    .sla-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .sla-item-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: rgba(0, 242, 254, 0.2);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .form-side {
      padding: 50px 40px;
      background: #FFFFFF;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 14px;
      color: var(--text-main);
      background: #F8FAFC;
      transition: var(--transition);
      outline: none;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(29, 38, 113, 0.1);
    }
    .form-textarea {
      resize: vertical;
      min-height: 90px;
    }
    /* Bottom Floating Conversion Bar */
    .bottom-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(11, 15, 25, 0.94);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding: 12px 0;
      z-index: 99;
      box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.25);
    }
    .bottom-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .bottom-bar-info {
      display: flex;
      align-items: center;
      gap: 16px;
      color: #FFFFFF;
    }
    .bottom-bar-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    /* Footer */
    .site-footer {
      background: var(--bg-dark);
      color: #94A3B8;
      padding: 70px 0 100px 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 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand-title {
      font-size: 18px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }
    /* Mobile Menu Drawer */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--primary);
      margin: 5px 0;
      transition: var(--transition);
    }
    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-grid, .arch-grid, .scenario-panel.active, .contact-card-box {
        grid-template-columns: 1fr;
      }
      .features-grid, .products-grid, .dark-cards-grid, .testimonial-grid, .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .scenario-tabs {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-row {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links, .nav-action-btn {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
        gap: 12px;
      }
      .features-grid, .products-grid, .dark-cards-grid, .testimonial-grid, .insights-grid, .story-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 26px;
      }
      .sla-side, .form-side {
        padding: 32px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .bottom-bar-info {
        display: none;
      }
      .bottom-bar-actions {
        width: 100%;
        justify-content: space-between;
      }
      .bottom-bar-actions .btn {
        flex: 1;
      }
      .scenario-tabs {
        grid-template-columns: 1fr;
      }
    }