/* roulang page: index */
:root {
      --primary: #0D9488;
      --primary-dark: #047857;
      --primary-light: #CCFBF1;
      --accent: #F97316;
      --accent-hover: #EA580C;
      --dark-navy: #0F172A;
      --slate-dark: #1E293B;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --bg-white: #FFFFFF;
      --bg-light: #F8FAFC;
      --bg-emerald-tint: #F0FDF4;
      --border-color: #E2E8F0;
      --border-accent: rgba(13, 148, 136, 0.2);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-full: 9999px;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(13, 148, 136, 0.08), 0 8px 10px -6px rgba(13, 148, 136, 0.05);
      --shadow-lg: 0 20px 30px -10px rgba(15, 23, 42, 0.12);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease-in-out;
    }

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* Top Info Bar */
    .top-bar {
      background-color: #0b1322;
      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-links a {
      color: #cbd5e1;
      margin-left: 20px;
    }
    .top-bar-links a:hover {
      color: var(--primary-light);
    }

    /* Sticky Main Navigation */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 1px 3px 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;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 20px;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #fff;
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 28px;
      align-items: center;
    }
    .nav-item a {
      font-size: 15px;
      font-weight: 500;
      color: #334155;
      padding: 6px 0;
      position: relative;
    }
    .nav-item a:hover {
      color: var(--primary);
    }
    .nav-item.active a {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-cta-btn {
      background: linear-gradient(135deg, var(--accent), var(--accent-hover));
      color: #fff !important;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
    }
    .nav-cta-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(249, 115, 22, 0.35);
    }

    /* Mobile Nav Toggle */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: #0f172a;
      margin: 5px 0;
      transition: all 0.3s;
    }

    /* Section Base */
    section {
      padding: 84px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px;
    }
    .section-eyebrow {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 600;
      border-radius: var(--radius-full);
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: clamp(1.85rem, 3.2vw, 2.45rem);
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* Primary Hero Section */
    .hero-organic {
      background: linear-gradient(170deg, #F0FDF4 0%, #FFFFFF 65%, #F8FAFC 100%);
      padding: 90px 0 100px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: rgba(13, 148, 136, 0.1);
      border: 1px solid rgba(13, 148, 136, 0.2);
      border-radius: var(--radius-full);
      font-size: 13px;
      color: var(--primary-dark);
      font-weight: 600;
      margin-bottom: 22px;
    }
    .hero-title {
      font-size: clamp(2.2rem, 4.2vw, 3.1rem);
      font-weight: 800;
      line-height: 1.25;
      color: #0f172a;
      margin-bottom: 22px;
      letter-spacing: -0.8px;
    }
    .hero-title .highlight {
      color: var(--primary);
      position: relative;
      white-space: nowrap;
    }
    .hero-description {
      font-size: 16px;
      line-height: 1.85;
      color: #334155;
      margin-bottom: 34px;
    }
    .hero-action-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 38px;
    }
    .btn-main {
      background: linear-gradient(135deg, var(--accent), var(--accent-hover));
      color: #fff;
      font-weight: 600;
      padding: 14px 34px;
      border-radius: var(--radius-full);
      box-shadow: 0 8px 20px rgba(249, 115, 22, 0.28);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(249, 115, 22, 0.35);
    }
    .btn-secondary {
      background: #FFFFFF;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      font-weight: 600;
      padding: 14px 28px;
      border-radius: var(--radius-full);
      box-shadow: var(--shadow-sm);
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #F0FDF4;
    }
    .hero-metrics-pill {
      display: flex;
      gap: 28px;
      padding-top: 24px;
      border-top: 1px dashed #cbd5e1;
    }
    .metric-pill-item {
      display: flex;
      flex-direction: column;
    }
    .metric-pill-item strong {
      font-size: 20px;
      color: var(--primary-dark);
      font-weight: 800;
    }
    .metric-pill-item span {
      font-size: 13px;
      color: #64748b;
    }
    .hero-visual-card {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255, 255, 255, 0.8);
      background: #fff;
    }
    .hero-visual-card img {
      width: 100%;
      height: 420px;
      object-fit: cover;
      display: block;
    }
    .hero-floating-tag {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(8px);
      color: #ffffff;
      padding: 14px 18px;
      border-radius: var(--radius-md);
      font-size: 13px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    /* Section 2: Pain Points & Solution Contrast */
    .section-contrast {
      background-color: var(--bg-white);
    }
    .contrast-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .contrast-card {
      background: var(--bg-light);
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .contrast-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-light);
    }
    .card-scene-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 2px solid var(--primary-light);
    }
    .contrast-box {
      margin-bottom: 16px;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      line-height: 1.6;
    }
    .contrast-box.traditional {
      background: #FEF2F2;
      border-left: 3px solid #EF4444;
      color: #991B1B;
    }
    .contrast-box.optimized {
      background: #ECFDF5;
      border-left: 3px solid #10B981;
      color: #065F46;
      margin-bottom: 0;
      flex-grow: 1;
    }

    /* Section 3: Architecture & System Overview */
    .section-arch {
      background: var(--bg-emerald-tint);
    }
    .arch-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .arch-img-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid #d1fae5;
    }
    .arch-img-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .arch-points {
      list-style: none;
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .arch-item {
      display: flex;
      gap: 14px;
      background: #FFFFFF;
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .arch-item-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .arch-item-body h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 4px;
      color: var(--text-main);
    }
    .arch-item-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 4: 6-Dimensional Advantages Grid */
    .section-advantages {
      background: var(--bg-white);
    }
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      padding: 30px 24px;
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      position: relative;
    }
    .adv-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-5px);
    }
    .adv-badge {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 20px;
    }
    .adv-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .adv-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 5: Hardware & Software Linkage Products */
    .section-products {
      background: var(--bg-light);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-box {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .product-box img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .product-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .product-body h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .product-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
    }
    .product-specs {
      list-style: none;
      margin-bottom: 20px;
      font-size: 13px;
      color: #334155;
    }
    .product-specs li {
      padding: 5px 0;
      border-bottom: 1px dashed #f1f5f9;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .product-specs li::before {
      content: "•";
      color: var(--primary);
      font-weight: bold;
    }
    .product-cta {
      margin-top: auto;
      text-align: center;
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 10px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 14px;
    }
    .product-cta:hover {
      background: var(--primary);
      color: #ffffff;
    }

    /* Section 6: Scenarios Interactive Tabs */
    .section-scenarios {
      background: #FFFFFF;
    }
    .scenario-tabs {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .tab-btn {
      padding: 10px 24px;
      border-radius: var(--radius-full);
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .tab-btn.active, .tab-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }
    .scenario-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--bg-light);
      padding: 40px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      align-items: center;
    }
    .scenario-text h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .scenario-text p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .scenario-highlights {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .scenario-badge-item {
      background: #ffffff;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: #1e293b;
      border: 1px solid var(--border-color);
      font-weight: 500;
    }
    .scenario-preview img {
      border-radius: var(--radius-md);
      width: 100%;
      height: 320px;
      object-fit: cover;
      box-shadow: var(--shadow-md);
    }

    /* Section 7: Dark Theme Governance & Tech Concept */
    .section-concept-dark {
      background-color: var(--dark-navy);
      color: #F8FAFC;
    }
    .concept-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .concept-card {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(13, 148, 136, 0.3);
      padding: 32px 26px;
      border-radius: var(--radius-md);
      transition: all 0.3s;
    }
    .concept-card:hover {
      border-color: #14B8A6;
      box-shadow: 0 0 25px rgba(20, 184, 166, 0.15);
      transform: translateY(-4px);
    }
    .concept-card h3 {
      font-size: 19px;
      color: #2DD4BF;
      margin-bottom: 14px;
      font-weight: 700;
    }
    .concept-card p {
      font-size: 14px;
      line-height: 1.8;
      color: #CBD5E1;
    }

    /* Section 8: Key Metrics Ribbon */
    .section-metrics-bar {
      background: linear-gradient(135deg, #0F766E 0%, #047857 100%);
      color: #FFFFFF;
      padding: 60px 0;
    }
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-number {
      font-size: clamp(2rem, 3.5vw, 2.75rem);
      font-weight: 800;
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -1px;
      color: #F0FDF4;
    }
    .metric-title {
      font-size: 16px;
      font-weight: 600;
      color: #CCFBF1;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.75);
    }

    /* Section 9: Case Studies & User Stories */
    .section-cases {
      background: var(--bg-white);
    }
    .cases-split-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
    .case-panel {
      background: var(--bg-light);
      border-radius: var(--radius-lg);
      padding: 34px;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .case-header-tag {
      font-size: 13px;
      color: var(--primary);
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 12px;
      display: inline-block;
    }
    .case-panel h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--text-main);
    }
    .case-quote {
      font-size: 14px;
      line-height: 1.8;
      color: #334155;
      margin-bottom: 22px;
      padding-left: 16px;
      border-left: 3px solid var(--accent);
      font-style: italic;
    }
    .case-author {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: auto;
      padding-top: 18px;
      border-top: 1px solid #E2E8F0;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }
    .author-info strong {
      display: block;
      font-size: 14px;
      color: var(--text-main);
    }
    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Section 10: Industry News & Examination Policy */
    .section-news {
      background: var(--bg-light);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: transform 0.2s ease;
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .news-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .news-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-meta {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
      display: flex;
      justify-content: space-between;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .news-link:hover {
      color: var(--primary-dark);
      text-decoration: underline;
    }

    /* Section 11: FAQ Accordion */
    .section-faq {
      background: #FFFFFF;
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: var(--bg-light);
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-item[open] {
      background: #FFFFFF;
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
    }
    .faq-question::-webkit-details-marker {
      display: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--primary);
      font-weight: 400;
      transition: transform 0.2s;
    }
    .faq-item[open] .faq-question::after {
      content: "−";
      transform: rotate(180deg);
    }
    .faq-answer {
      padding: 0 24px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }

    /* Section 12: Compliance & Final CTA Form */
    .section-compliance-cta {
      background: linear-gradient(180deg, #FFFFFF 0%, #F0FDF4 100%);
      padding-bottom: 90px;
    }
    .trust-badges-row {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 32px;
      margin-bottom: 60px;
      padding-bottom: 40px;
      border-bottom: 1px solid #E2E8F0;
    }
    .trust-badge-item {
      display: flex;
      align-items: center;
      gap: 12px;
      background: #FFFFFF;
      padding: 12px 22px;
      border-radius: var(--radius-full);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .trust-badge-icon {
      color: var(--primary);
      font-weight: bold;
      font-size: 18px;
    }
    .trust-badge-item span {
      font-size: 14px;
      font-weight: 600;
      color: #334155;
    }
    .cta-form-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(13, 148, 136, 0.15);
      max-width: 900px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-top: 24px;
    }
    .form-group-full {
      grid-column: span 2;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      background: #F8FAFC;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #FFFFFF;
    }
    .btn-submit {
      width: 100%;
      background: linear-gradient(135deg, var(--accent), var(--accent-hover));
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 700;
      padding: 14px;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
      transition: transform 0.2s ease;
    }
    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(249, 115, 22, 0.4);
    }

    /* Fixed Bottom Action Ribbon */
    .fixed-bottom-cta {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(15, 23, 42, 0.95);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      z-index: 999;
      padding: 12px 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.15);
    }
    .bottom-cta-inner {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .bottom-cta-text {
      color: #F8FAFC;
      font-size: 14px;
    }
    .bottom-cta-text strong {
      color: #2DD4BF;
    }
    .bottom-cta-actions {
      display: flex;
      gap: 14px;
    }
    .btn-bottom-orange {
      background: var(--accent);
      color: #FFFFFF;
      font-size: 13px;
      font-weight: 700;
      padding: 8px 20px;
      border-radius: var(--radius-full);
    }
    .btn-bottom-outline {
      background: transparent;
      border: 1px solid #475569;
      color: #E2E8F0;
      font-size: 13px;
      font-weight: 600;
      padding: 8px 18px;
      border-radius: var(--radius-full);
    }
    .btn-bottom-outline:hover {
      border-color: #2DD4BF;
      color: #2DD4BF;
    }

    /* Footer */
    .site-footer {
      background: #0B132B;
      color: #94A3B8;
      padding: 80px 0 110px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
      position: relative;
    }
    .footer-col h4::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -6px;
      width: 24px;
      height: 2px;
      background: var(--primary);
    }
    .footer-col p {
      line-height: 1.8;
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul li a:hover {
      color: #2DD4BF;
      padding-left: 4px;
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 30px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 13px;
    }
    .footer-bottom a:hover {
      color: #CBD5E1;
    }

    /* Responsive Queries */
    @media (max-width: 1024px) {
      .contrast-grid, .advantage-grid, .products-grid, .concept-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        display: none;
        gap: 18px;
      }
      .nav-menu.show {
        display: flex;
      }
      .top-bar-inner {
        flex-direction: column;
        gap: 4px;
        text-align: center;
      }
      .hero-grid, .arch-layout, .scenario-content, .cases-split-grid {
        grid-template-columns: 1fr;
      }
      .hero-visual-card img {
        height: 280px;
      }
      .contrast-grid, .advantage-grid, .products-grid, .concept-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .metrics-bar-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .bottom-cta-text {
        display: none;
      }
      .bottom-cta-actions {
        width: 100%;
        justify-content: space-between;
      }
      .btn-bottom-orange, .btn-bottom-outline {
        flex: 1;
        text-align: center;
      }
    }