/* roulang page: index */
:root {
      --primary: #0E4A4A;
      --primary-light: #166565;
      --accent: #10B981;
      --accent-dark: #059669;
      --titanium: #64748B;
      --dark-slate: #061E1E;
      --deep-bg: #0A1926;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --card-radius: 6px;
      --shadow-subtle: 0 4px 20px -2px rgba(14, 74, 74, 0.06);
      --shadow-hover: 0 10px 25px -4px rgba(14, 74, 74, 0.12);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
      background-color: var(--bg-white);
      color: var(--text-body);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    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 1.5rem;
    }

    /* Top Utility Bar */
    .top-bar {
      background-color: #082828;
      color: #94A3B8;
      font-size: 12px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .top-bar-tag {
      color: var(--accent);
      background: rgba(16, 185, 129, 0.15);
      padding: 1px 8px;
      border-radius: 3px;
      font-weight: 500;
    }

    /* Main Sticky Navigation */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 800;
      font-size: 20px;
      letter-spacing: -1px;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
    }
    .brand-subtitle {
      font-size: 0.72rem;
      color: var(--text-muted);
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 22px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-cta-btn {
      background-color: var(--primary);
      color: #FFFFFF !important;
      font-size: 0.9rem;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: 4px;
      display: inline-block;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .nav-cta-btn:hover {
      background-color: var(--primary-light);
      transform: translateY(-1px);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      font-size: 1.5rem;
      color: var(--primary);
      padding: 5px;
    }

    /* Section Global Styles */
    section {
      padding: 85px 0;
      position: relative;
    }
    .section-light {
      background-color: var(--bg-light);
    }
    .section-white {
      background-color: var(--bg-white);
    }
    .section-dark {
      background-color: var(--dark-slate);
      color: #E2E8F0;
    }
    .section-header {
      margin-bottom: 45px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .badge-pill {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 4px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
    }
    .badge-primary {
      background: rgba(14, 74, 74, 0.08);
      color: var(--primary);
    }
    .badge-accent {
      background: rgba(16, 185, 129, 0.15);
      color: var(--accent);
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 26px;
      border-radius: 4px;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      gap: 8px;
    }
    .btn:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }
    .btn:active {
      transform: scale(0.98);
    }
    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background: var(--primary-light);
      box-shadow: 0 4px 15px rgba(14, 74, 74, 0.25);
    }
    .btn-accent {
      background: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background: var(--accent-dark);
      box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    }
    .btn-outline {
      background: transparent;
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-outline-white {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.4);
      color: #FFFFFF;
    }
    .btn-outline-white:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.1);
    }

    /* 1. Hero Section */
    .hero-section {
      position: relative;
      background: linear-gradient(rgba(6, 30, 30, 0.88), rgba(10, 25, 38, 0.92)), url('/assets/images/5135c0c2243bc747.webp') center/cover no-repeat;
      color: #FFFFFF;
      padding: 120px 0 100px;
      min-height: 85vh;
      display: flex;
      align-items: center;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      gap: 50px;
      align-items: center;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(16, 185, 129, 0.18);
      border: 1px solid rgba(16, 185, 129, 0.35);
      color: #34D399;
      padding: 6px 14px;
      border-radius: 4px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 3.1rem;
      font-weight: 800;
      line-height: 1.22;
      color: #FFFFFF;
      margin-bottom: 22px;
      letter-spacing: -1px;
    }
    .hero-title span {
      color: var(--accent);
      background: linear-gradient(120deg, #10B981, #6EE7B7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      line-height: 1.8;
      color: #CBD5E1;
      margin-bottom: 35px;
      max-width: 680px;
    }
    .hero-points {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 35px;
    }
    .hero-points li {
      font-size: 0.95rem;
      color: #E2E8F0;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .hero-points li::before {
      content: "✓";
      color: var(--accent);
      font-weight: bold;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-panel {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(12px);
      padding: 30px;
      border-radius: var(--card-radius);
    }
    .hero-panel-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 12px;
    }
    .hero-metric-item {
      margin-bottom: 16px;
    }
    .hero-metric-label {
      font-size: 0.85rem;
      color: #94A3B8;
      margin-bottom: 4px;
      display: flex;
      justify-content: space-between;
    }
    .hero-metric-bar {
      height: 6px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 3px;
      overflow: hidden;
    }
    .hero-metric-fill {
      height: 100%;
      background: var(--accent);
      border-radius: 3px;
    }
    .hero-trust-bar {
      margin-top: 45px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      display: flex;
      gap: 30px;
      align-items: center;
      font-size: 0.88rem;
      color: #94A3B8;
      flex-wrap: wrap;
    }

    /* 2. Challenges & Pain Points */
    .challenges-grid {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 40px;
      align-items: flex-start;
    }
    .challenge-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .challenge-card {
      background: #FFFFFF;
      border: 1px solid #FED7AA;
      border-left: 4px solid #EA580C;
      padding: 24px;
      border-radius: var(--card-radius);
      box-shadow: var(--shadow-subtle);
    }
    .challenge-code {
      font-size: 0.75rem;
      font-weight: 700;
      color: #EA580C;
      margin-bottom: 8px;
      text-transform: uppercase;
    }
    .challenge-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .challenge-card p {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 3. Brand & Innovation Platform */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 50px;
      align-items: center;
    }
    .about-image-wrapper {
      position: relative;
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: 0 15px 35px rgba(14, 74, 74, 0.15);
    }
    .about-image-wrapper img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .about-badge-float {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: rgba(14, 74, 74, 0.95);
      color: #FFFFFF;
      padding: 16px 22px;
      border-radius: 4px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(5px);
    }
    .about-badge-float .num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1;
    }
    .about-badge-float .txt {
      font-size: 0.8rem;
      color: #CBD5E1;
      margin-top: 4px;
    }
    .spec-table-inline {
      margin-top: 25px;
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 15px;
    }
    .spec-item {
      font-size: 0.9rem;
    }
    .spec-item strong {
      color: var(--primary);
      display: block;
      margin-bottom: 2px;
    }

    /* 4. Core Advantages */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }
    .advantage-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 30px;
      box-shadow: var(--shadow-subtle);
      transition: var(--transition);
      position: relative;
    }
    .advantage-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }
    .advantage-num {
      font-size: 1.4rem;
      font-weight: 800;
      color: rgba(14, 74, 74, 0.15);
      position: absolute;
      top: 20px;
      right: 24px;
    }
    .advantage-card h4 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .advantage-card p {
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 5. Hot Products */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-subtle);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .product-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .product-img-box {
      height: 220px;
      overflow: hidden;
      position: relative;
    }
    .product-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .product-card:hover .product-img-box img {
      transform: scale(1.04);
    }
    .product-tag-fixed {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(14, 74, 74, 0.88);
      color: #FFFFFF;
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 3px;
      backdrop-filter: blur(4px);
    }
    .product-body {
      padding: 26px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .product-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .product-desc {
      font-size: 0.92rem;
      color: var(--text-body);
      margin-bottom: 18px;
      line-height: 1.6;
    }
    .product-specs {
      background: var(--bg-light);
      padding: 12px 16px;
      border-radius: 4px;
      margin-bottom: 20px;
      font-size: 0.85rem;
    }
    .product-specs div {
      display: flex;
      justify-content: space-between;
      padding: 3px 0;
      border-bottom: 1px dashed #E2E8F0;
    }
    .product-specs div:last-child {
      border-bottom: none;
    }
    .product-cta {
      margin-top: auto;
    }

    /* 6. Process & Engineering Chain (Dark Contrast) */
    .process-chain {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 25px;
      position: relative;
      margin-top: 40px;
    }
    .process-step {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 28px 22px;
      border-radius: var(--card-radius);
      position: relative;
    }
    .step-marker {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(16, 185, 129, 0.15);
      display: inline-block;
      padding: 2px 10px;
      border-radius: 3px;
      margin-bottom: 14px;
    }
    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 10px;
    }
    .step-desc {
      font-size: 0.88rem;
      color: #94A3B8;
      line-height: 1.65;
    }

    /* 7. Application Stories / Case Studies */
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 35px;
    }
    .case-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-subtle);
    }
    .case-header-img {
      height: 200px;
      overflow: hidden;
    }
    .case-header-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-content {
      padding: 28px;
    }
    .case-flow {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 15px;
    }
    .case-row {
      font-size: 0.9rem;
      line-height: 1.6;
    }
    .case-label {
      font-weight: 700;
      color: var(--primary);
      margin-right: 6px;
    }

    /* 8. Scientific Metrics Bar */
    .metrics-section {
      background: linear-gradient(135deg, #0E4A4A, #083333);
      color: #FFFFFF;
      padding: 60px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .metric-value {
      font-size: 3rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }
    .metric-name {
      font-size: 1.05rem;
      font-weight: 600;
      color: #FFFFFF;
      margin: 8px 0 4px;
    }
    .metric-sub {
      font-size: 0.85rem;
      color: #94A3B8;
    }

    /* 9. Expert Reviews */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }
    .review-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 30px;
      box-shadow: var(--shadow-subtle);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-quote {
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .reviewer-meta {
      border-top: 1px solid var(--border-color);
      padding-top: 15px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 10. News & Insights */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }
    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-subtle);
      transition: var(--transition);
    }
    .news-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }
    .news-body {
      padding: 24px;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--titanium);
      margin-bottom: 8px;
    }
    .news-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-readmore {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 11. FAQ Accordion */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-header {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #FAFBFD;
      border-top: 1px solid transparent;
      padding: 0 24px;
    }
    .faq-body p {
      padding-bottom: 20px;
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.7;
    }
    .faq-item.active {
      border-color: var(--accent);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-item.active .faq-body {
      max-height: 350px;
      padding: 18px 24px 0;
      border-top-color: var(--border-color);
    }

    /* 12. Final CTA Form Section */
    .final-cta-box {
      background: linear-gradient(135deg, #0A2E2E 0%, #061E1E 100%);
      border-radius: var(--card-radius);
      padding: 60px 50px;
      color: #FFFFFF;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    }
    .cta-grid {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .cta-content h2 {
      font-size: 2.2rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 18px;
      line-height: 1.3;
    }
    .cta-content p {
      font-size: 1.05rem;
      color: #CBD5E1;
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .cta-form {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.15);
      padding: 30px;
      border-radius: var(--card-radius);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.85rem;
      color: #E2E8F0;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      background: rgba(255, 255, 255, 0.95);
      border: 1px solid #CBD5E1;
      border-radius: 4px;
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    }

    /* Commercial Footer */
    .site-footer {
      background: #051818;
      color: #94A3B8;
      padding: 70px 0 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
      padding-left: 4px;
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-contact-list strong {
      color: #E2E8F0;
    }
    .cert-badges {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .cert-badge {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 8px 12px;
      border-radius: 4px;
      font-size: 0.8rem;
      color: #CBD5E1;
    }
    .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: 15px;
      font-size: 0.82rem;
    }

    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .challenges-grid {
        grid-template-columns: 1fr;
      }
      .challenge-cards {
        grid-template-columns: 1fr;
      }
      .advantages-grid, .products-grid, .reviews-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-chain {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cta-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .header-nav {
        position: relative;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-top: 1px solid var(--border-color);
        gap: 15px;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-cta-btn {
        display: none;
      }
      .hero-title {
        font-size: 2.2rem;
      }
      .about-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .advantages-grid, .products-grid, .reviews-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .process-chain {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }