/* roulang page: index */
:root {
      --primary: #0F2C59;
      --primary-dark: #0A192F;
      --accent: #FF6B35;
      --accent-hover: #E85924;
      --teal: #0B666A;
      --bg-light: #F8FAFC;
      --surface: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 24px -4px rgba(15, 44, 89, 0.08);
      --shadow-lg: 0 16px 32px -6px rgba(15, 44, 89, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    ul, ol {
      list-style: none;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section-wrap {
      padding: 80px 0;
    }
    .section-white {
      background-color: #FFFFFF;
    }
    .section-gray {
      background-color: #F8FAFC;
    }
    .section-dark {
      background-color: var(--primary-dark);
      color: #F1F5F9;
    }
    .header-bar {
      background: var(--primary);
      color: #94A3B8;
      font-size: 12px;
      line-height: 38px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .header-bar .inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .header-bar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #38BDF8;
    }
    .header-bar-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #38BDF8;
      box-shadow: 0 0 8px #38BDF8;
    }
    .site-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--accent), var(--accent-hover));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-size: 18px;
      box-shadow: 0 4px 10px rgba(255, 107, 53, 0.35);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 26px;
    }
    .nav-links a {
      font-size: 15px;
      color: var(--text-body);
      font-weight: 500;
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover {
      color: var(--accent);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 30px;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid transparent;
    }
    .btn-accent {
      background: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 107, 53, 0.45);
    }
    .btn-outline-white {
      background: rgba(255, 255, 255, 0.12);
      color: #FFFFFF;
      border-color: rgba(255, 255, 255, 0.4);
      backdrop-filter: blur(4px);
    }
    .btn-outline-white:hover {
      background: #FFFFFF;
      color: var(--primary);
    }
    .btn-navy {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-navy:hover {
      background: #194483;
      transform: translateY(-2px);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(255, 107, 53, 0.1);
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-tag.tag-dark {
      background: rgba(255, 255, 255, 0.15);
      color: #F8FAFC;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }
    .hero-flagship {
      position: relative;
      background-image: linear-gradient(180deg, rgba(15, 44, 89, 0.88) 0%, rgba(10, 25, 47, 0.95) 100%), url('/assets/images/2d9ecab233e1924f.jpg');
      background-size: cover;
      background-position: center;
      color: #FFFFFF;
      padding: 90px 0 110px 0;
      overflow: hidden;
    }
    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
      position: relative;
      z-index: 2;
    }
    .hero-badge-strip {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      padding: 8px 18px;
      background: rgba(255, 255, 255, 0.12);
      border-radius: 40px;
      backdrop-filter: blur(8px);
      margin-bottom: 24px;
      border: 1px solid rgba(255, 255, 255, 0.2);
      font-size: 13px;
      color: #E2E8F0;
    }
    .hero-title {
      font-size: 46px;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 24px;
      letter-spacing: -0.02em;
    }
    .hero-title span {
      color: #FFB088;
    }
    .hero-summary {
      font-size: 17px;
      line-height: 1.85;
      color: #CBD5E1;
      margin-bottom: 36px;
    }
    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .hero-shelf-nav {
      max-width: 980px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.18);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      padding: 16px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
    }
    .hero-shelf-item {
      padding: 14px 18px;
      background: rgba(15, 23, 42, 0.4);
      border-radius: var(--radius-md);
      display: flex;
      flex-direction: column;
      text-align: left;
      border: 1px solid rgba(255, 255, 255, 0.06);
      transition: all 0.3s;
    }
    .hero-shelf-item:hover {
      background: rgba(255, 107, 53, 0.2);
      border-color: rgba(255, 107, 53, 0.5);
      transform: translateY(-3px);
    }
    .hero-shelf-title {
      font-weight: 700;
      font-size: 15px;
      color: #FFF;
      margin-bottom: 4px;
    }
    .hero-shelf-sub {
      font-size: 12px;
      color: #94A3B8;
    }
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .catalog-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }
    .catalog-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .catalog-thumb {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .catalog-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .catalog-card:hover .catalog-thumb img {
      transform: scale(1.06);
    }
    .catalog-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 44, 89, 0.85);
      color: #FFF;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 6px;
      backdrop-filter: blur(4px);
    }
    .catalog-body {
      padding: 24px;
    }
    .catalog-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .catalog-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .catalog-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 16px;
      border-top: 1px solid #F1F5F9;
      font-size: 13px;
      color: var(--text-muted);
    }
    .catalog-meta strong {
      color: var(--accent);
      font-weight: 700;
    }
    .intro-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .intro-img-frame {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      position: relative;
      border: 1px solid var(--border-color);
    }
    .intro-float-tag {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: rgba(15, 44, 89, 0.92);
      color: #FFF;
      padding: 14px 20px;
      border-radius: var(--radius-md);
      box-shadow: 0 8px 20px rgba(0,0,0,0.2);
      font-size: 13px;
      backdrop-filter: blur(6px);
    }
    .intro-float-tag strong {
      font-size: 22px;
      color: #FFB088;
      display: block;
    }
    .intro-list {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .intro-list-item {
      display: flex;
      gap: 14px;
    }
    .intro-list-icon {
      width: 28px;
      height: 28px;
      background: rgba(11, 102, 106, 0.12);
      color: var(--teal);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-box {
      background: #FFFFFF;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: all 0.3s;
      position: relative;
    }
    .feature-box:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .feature-num {
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 32px;
      font-weight: 800;
      color: #E2E8F0;
      line-height: 1;
    }
    .feature-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: #FFF5F0;
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 20px;
    }
    .feature-h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .feature-p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .engine-schematic {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .engine-node {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }
    .engine-node-step {
      font-size: 12px;
      text-transform: uppercase;
      color: #38BDF8;
      font-weight: 700;
      margin-bottom: 8px;
      display: block;
    }
    .engine-node-title {
      font-size: 17px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 10px;
    }
    .engine-node-desc {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.6;
    }
    .metrics-bar {
      background: var(--primary);
      color: #FFF;
      padding: 50px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item {
      padding: 10px;
    }
    .metric-value {
      font-size: 44px;
      font-weight: 800;
      color: #FFB088;
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: Arial, sans-serif;
    }
    .metric-title {
      font-size: 15px;
      font-weight: 600;
      color: #E2E8F0;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 12px;
      color: #94A3B8;
    }
    .solution-timeline {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      position: relative;
    }
    .solution-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .solution-phase {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 4px;
      background: #F1F5F9;
      color: var(--primary);
      font-size: 12px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .solution-heading {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .solution-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .solution-point-list {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.8;
    }
    .solution-point-list li::before {
      content: "•";
      color: var(--accent);
      font-weight: bold;
      margin-right: 8px;
    }
    .case-banner {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      box-shadow: var(--shadow-md);
    }
    .case-content {
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .case-tag {
      color: var(--teal);
      font-weight: 700;
      font-size: 13px;
      margin-bottom: 10px;
    }
    .case-title {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .case-summary {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .case-stats {
      display: flex;
      gap: 30px;
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }
    .case-stat-num {
      font-size: 24px;
      font-weight: 800;
      color: var(--accent);
    }
    .case-stat-label {
      font-size: 12px;
      color: var(--text-muted);
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 20px;
      font-style: italic;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .review-meta h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .review-meta p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .news-card-img {
      height: 180px;
      overflow: hidden;
    }
    .news-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-card-body {
      padding: 22px;
    }
    .news-badge {
      font-size: 12px;
      font-weight: 600;
      color: var(--teal);
      margin-bottom: 8px;
      display: inline-block;
    }
    .news-h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
      margin-bottom: 10px;
    }
    .news-p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .topic-index-section {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .topic-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
    }
    .topic-pill {
      padding: 8px 16px;
      background: #F1F5F9;
      border-radius: 20px;
      font-size: 13px;
      color: var(--text-body);
      border: 1px solid #E2E8F0;
      transition: all 0.2s;
    }
    .topic-pill:hover {
      background: #FFF;
      border-color: var(--accent);
      color: var(--accent);
    }
    .share-box {
      background: linear-gradient(135deg, #0F2C59 0%, #0A192F 100%);
      border-radius: var(--radius-lg);
      padding: 48px;
      color: #FFF;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 30px;
    }
    .share-info h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 12px;
      color: #FFFFFF;
    }
    .share-info p {
      font-size: 15px;
      color: #94A3B8;
      max-width: 600px;
      line-height: 1.7;
    }
    .share-actions {
      display: flex;
      gap: 14px;
      flex-shrink: 0;
    }
    .faq-list {
      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;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 16px;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--accent);
      font-weight: 400;
      transition: transform 0.2s;
    }
    .faq-item.active .faq-question::after {
      content: "−";
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px solid #F8FAFC;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .guarantee-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
    }
    .guarantee-icon {
      font-size: 28px;
      margin-bottom: 12px;
      color: var(--teal);
    }
    .guarantee-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .guarantee-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .contact-card-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: var(--shadow-md);
    }
    .contact-left h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .contact-left p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .contact-privilege {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 30px;
    }
    .privilege-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-body);
      font-weight: 500;
    }
    .privilege-item::before {
      content: "✓";
      color: var(--teal);
      font-weight: bold;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
      font-family: inherit;
    }
    .form-control:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15);
    }
    .sticky-bar {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 99;
      background: rgba(15, 44, 89, 0.94);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 40px;
      padding: 10px 24px;
      display: flex;
      align-items: center;
      gap: 20px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.25);
    }
    .sticky-bar-text {
      color: #FFF;
      font-size: 14px;
      font-weight: 600;
    }
    .site-footer {
      background: #0B132B;
      color: #94A3B8;
      padding: 70px 0 30px 0;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      color: #FFF;
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .footer-col h5 {
      color: #FFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
      color: #64748B;
    }
    @media (max-width: 1024px) {
      .catalog-grid, .features-grid, .reviews-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .engine-schematic, .metrics-grid, .guarantee-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-shelf-nav {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .header-bar {
        display: none;
      }
      .nav-links {
        display: none;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFF;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        gap: 16px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 32px;
      }
      .hero-summary {
        font-size: 15px;
      }
      .catalog-grid, .features-grid, .solution-timeline, .reviews-grid, .news-grid, .intro-split, .case-banner, .contact-card-wrap {
        grid-template-columns: 1fr;
      }
      .case-content, .contact-card-wrap {
        padding: 24px;
      }
      .share-box {
        flex-direction: column;
        text-align: center;
        padding: 30px;
      }
      .share-actions {
        width: 100%;
        justify-content: center;
      }
      .sticky-bar {
        width: 90%;
        flex-direction: column;
        gap: 10px;
        padding: 12px;
        bottom: 10px;
      }
      .sticky-bar-text {
        font-size: 12px;
      }
    }