/* roulang page: index */
:root {
      --primary: #0F172A;
      --primary-dark: #020617;
      --secondary: #1E293B;
      --accent: #D97706;
      --accent-hover: #B45309;
      --teal: #0D9488;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #090D16;
      --text-main: #020617;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-dark: #1E293B;
      --gold-gradient: linear-gradient(135deg, #F59E0B 0%, #D97706 50%, #B45309 100%);
      --dark-card: rgba(15, 23, 42, 0.7);
      --shadow-sm: 0 2px 8px -2px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 10px 30px -4px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 20px 40px -6px rgba(15, 23, 42, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: var(--bg-light);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

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

    button, input {
      font-family: inherit;
      outline: none;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* Top Utility Bar */
    .top-bar {
      background-color: #0B1120;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #38BDF8;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background-color: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
    }

    /* Main Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(15, 23, 42, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      transition: var(--transition);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .site-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: #FFFFFF;
      letter-spacing: -0.01em;
    }
    .logo-mark {
      width: 38px;
      height: 38px;
      background: var(--gold-gradient);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0F172A;
      font-weight: 900;
      font-size: 1.1rem;
      box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: #CBD5E1;
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: #F8FAFC;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .header-cta {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn-gold {
      background: var(--gold-gradient);
      color: #0F172A;
      font-weight: 700;
      font-size: 0.875rem;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 4px 15px rgba(217, 119, 6, 0.25);
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-gold:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(217, 119, 6, 0.4);
    }
    .btn-outline {
      background: transparent;
      color: #E2E8F0;
      border: 1px solid rgba(255, 255, 255, 0.25);
      font-size: 0.875rem;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: #E2E8F0;
      color: #FFFFFF;
    }

    /* Mobile toggle */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: #FFFFFF;
      font-size: 1.5rem;
      cursor: pointer;
    }

    /* Section Global */
    section {
      padding: 96px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #F8FAFC;
    }
    .section-light {
      background-color: var(--bg-light);
    }
    .section-white {
      background-color: var(--bg-white);
    }
    .section-header {
      margin-bottom: 56px;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--accent);
      background: rgba(217, 119, 6, 0.1);
      border: 1px solid rgba(217, 119, 6, 0.25);
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 12px;
    }
    .section-header h2 {
      font-size: clamp(1.75rem, 3.2vw, 2.375rem);
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-dark .section-header h2 {
      color: #FFFFFF;
    }
    .section-desc {
      max-width: 760px;
      margin: 0 auto;
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 1. Hero Banner Carousel & Black-Gold Membership Vibe */
    .hero-section {
      position: relative;
      background: #060911;
      padding: 110px 0 100px;
      color: #FFFFFF;
      overflow: hidden;
    }
    .hero-bg-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 80% 20%, rgba(217, 119, 6, 0.15) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(13, 148, 136, 0.12) 0%, transparent 50%),
                  linear-gradient(180deg, rgba(6, 9, 17, 0.6) 0%, #060911 100%);
      pointer-events: none;
      z-index: 1;
    }
    .hero-bg-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.18;
      z-index: 0;
    }
    .hero-container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
    }
    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(217, 119, 6, 0.4);
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 24px;
    }
    .hero-badge-icon {
      color: #F59E0B;
      font-size: 0.875rem;
    }
    .hero-badge-text {
      font-size: 0.8125rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      color: #FDE68A;
    }
    .hero-title {
      font-size: clamp(2.35rem, 4.5vw, 3.5rem);
      font-weight: 800;
      line-height: 1.18;
      letter-spacing: -0.02em;
      margin-bottom: 24px;
      color: #FFFFFF;
    }
    .hero-title span {
      background: linear-gradient(135deg, #FFFFFF 20%, #F59E0B 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.125rem;
      color: #CBD5E1;
      line-height: 1.85;
      margin-bottom: 36px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      margin-bottom: 44px;
    }
    .hero-meta-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      padding-top: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
    }
    .meta-stat-item h4 {
      font-size: 1.75rem;
      font-weight: 800;
      color: #FDE68A;
      margin-bottom: 4px;
    }
    .meta-stat-item p {
      font-size: 0.8125rem;
      color: #94A3B8;
    }
    .hero-card-stage {
      background: rgba(15, 23, 42, 0.75);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(245, 158, 11, 0.3);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 0 20px rgba(217, 119, 6, 0.1);
      position: relative;
    }
    .membership-tier-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      margin-bottom: 24px;
    }
    .tier-label {
      font-size: 0.8125rem;
      font-weight: 700;
      text-transform: uppercase;
      color: #F59E0B;
      background: rgba(245, 158, 11, 0.12);
      padding: 4px 10px;
      border-radius: 4px;
    }
    .tier-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-top: 4px;
    }
    .stage-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 28px;
    }
    .stage-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.9375rem;
      color: #E2E8F0;
    }
    .stage-icon {
      color: #F59E0B;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .stage-btn-full {
      width: 100%;
      text-align: center;
      padding: 14px;
      font-size: 1rem;
    }

    /* 2. Brand & Technology Overview */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .overview-image-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .overview-image-wrap img {
      width: 100%;
      height: 480px;
      object-fit: cover;
      transition: var(--transition);
    }
    .overview-image-wrap:hover img {
      transform: scale(1.02);
    }
    .overview-badge-float {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      background: rgba(15, 23, 42, 0.92);
      backdrop-filter: blur(10px);
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #FFFFFF;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .compliance-code {
      font-family: monospace;
      font-size: 0.8125rem;
      color: #38BDF8;
      background: rgba(56, 189, 248, 0.12);
      padding: 4px 8px;
      border-radius: 4px;
    }
    .overview-content h3 {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.35;
    }
    .overview-p {
      color: var(--text-body);
      margin-bottom: 20px;
      font-size: 1rem;
      line-height: 1.8;
    }
    .spec-table-mini {
      width: 100%;
      border-collapse: collapse;
      margin-top: 24px;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }
    .spec-table-mini td {
      padding: 12px 16px;
      font-size: 0.875rem;
      border-bottom: 1px solid var(--border-color);
    }
    .spec-table-mini tr:last-child td {
      border-bottom: none;
    }
    .spec-table-mini td.label {
      font-weight: 600;
      color: var(--text-main);
      background: #F8FAFC;
      width: 40%;
    }

    /* 3. Core Advantages (Strict 6 Cards Grid) */
    .grid-6-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .advantage-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;
    }
    .advantage-card:hover {
      transform: translateY(-4px);
      border-color: rgba(217, 119, 6, 0.4);
      box-shadow: 0 12px 30px -4px rgba(15, 23, 42, 0.08);
    }
    .card-num {
      position: absolute;
      top: 24px;
      right: 28px;
      font-size: 1.5rem;
      font-weight: 800;
      color: #E2E8F0;
      font-family: monospace;
    }
    .adv-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(15, 23, 42, 0.04);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 22px;
      color: var(--accent);
    }
    .advantage-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .advantage-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 4. Featured Products (3 Cards Comparison) */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .product-thumb {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .product-body {
      padding: 30px 26px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .product-tag {
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      color: var(--teal);
      margin-bottom: 8px;
    }
    .product-body h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .product-body p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .product-params {
      background: #F8FAFC;
      border-radius: var(--radius-sm);
      padding: 14px;
      margin-bottom: 22px;
      font-size: 0.8125rem;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .param-row {
      display: flex;
      justify-content: space-between;
      color: var(--text-body);
    }
    .param-row span:last-child {
      font-weight: 600;
      color: var(--text-main);
    }

    /* 5. Dark-Mode Philosophy & Showcase */
    .philosophy-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }
    .philosophy-text h3 {
      font-size: clamp(1.8rem, 3.5vw, 2.5rem);
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 24px;
      line-height: 1.25;
    }
    .philosophy-text p {
      font-size: 1.0625rem;
      color: #94A3B8;
      line-height: 1.85;
      margin-bottom: 32px;
    }
    .philosophy-pillars {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .pillar-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 20px;
    }
    .pillar-item h4 {
      font-size: 1.0625rem;
      color: #F8FAFC;
      margin-bottom: 8px;
    }
    .pillar-item p {
      font-size: 0.875rem;
      color: #64748B;
      line-height: 1.6;
      margin-bottom: 0;
    }
    .philosophy-visual {
      position: relative;
    }
    .philosophy-visual img {
      width: 100%;
      height: 440px;
      object-fit: cover;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255, 255, 255, 0.1);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    }

    /* 6. User Stories & Scenarios */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 36px;
    }
    .scenario-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }
    .scenario-img {
      height: 240px;
      width: 100%;
      object-fit: cover;
    }
    .scenario-content {
      padding: 32px 28px;
    }
    .scenario-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .scenario-content h3 {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .scenario-content p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom:20px;
    }
    .scenario-metrics {
      display: flex;
      gap: 20px;
      padding-top: 18px;
      border-top: 1px solid var(--border-color);
    }
    .scenario-metric-item strong {
      display: block;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--teal);
    }
    .scenario-metric-item span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 7. Metric Counter Strip */
    .metric-strip-section {
      background: #0B1120;
      color: #FFFFFF;
      padding: 64px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .metric-strip-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-box strong {
      display: block;
      font-size: clamp(2rem, 3.8vw, 3rem);
      font-weight: 800;
      color: #F59E0B;
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: monospace;
    }
    .metric-box p {
      font-size: 0.9375rem;
      color: #CBD5E1;
      font-weight: 500;
    }
    .metric-box span {
      display: block;
      font-size: 0.75rem;
      color: #64748B;
      margin-top: 4px;
    }

    /* 8. Client Testimonials */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .testimonial-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .testimonial-stars {
      color: #F59E0B;
      font-size: 0.875rem;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }
    .testimonial-text {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 24px;
      font-style: normal;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--secondary);
    }
    .author-info h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-info p {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 9. News & Insights Summary */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .news-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-bottom: 10px;
    }
    .news-body h3 {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 10. Partnership & Ecosystem */
    .eco-logos-wrap {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 20px;
    }
    .eco-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      text-align: center;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .eco-item:hover {
      border-color: var(--accent);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }
    .eco-badge {
      font-size: 1.1rem;
      font-weight: 800;
      color: #475569;
      letter-spacing: -0.01em;
      margin-bottom: 4px;
    }
    .eco-item:hover .eco-badge {
      color: var(--accent);
    }
    .eco-type {
      font-size: 0.75rem;
      color: #94A3B8;
    }

    /* 11. FAQ Accordion */
    .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-item[open] {
      border-color: #CBD5E1;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.0625rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      user-select: none;
    }
    .faq-question::-webkit-details-marker {
      display: none;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--accent);
      transition: transform 0.3s ease;
    }
    .faq-item[open] .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      padding: 0 24px 24px;
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.8;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

    /* 12. Trust & Guarantee Strip */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .guarantee-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      text-align: left;
    }
    .guarantee-card h3 {
      font-size: 1.25rem;
      color: #FFFFFF;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .guarantee-card p {
      font-size: 0.9375rem;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* Bottom Conversion Action Area */
    .cta-banner-wrap {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      border: 1px solid rgba(245, 158, 11, 0.3);
      border-radius: var(--radius-lg);
      padding: 64px 48px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
      box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.3);
    }
    .cta-banner-text h3 {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .cta-banner-text p {
      color: #CBD5E1;
      font-size: 1rem;
      line-height: 1.75;
    }
    .cta-form-box {
      background: rgba(255, 255, 255, 0.05);
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .cta-form-input {
      width: 100%;
      padding: 14px 16px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      margin-bottom: 14px;
    }
    .cta-form-btn {
      width: 100%;
      padding: 14px;
      background: var(--gold-gradient);
      color: #0F172A;
      font-weight: 700;
      font-size: 1rem;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
    }
    .cta-form-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 16px rgba(217, 119, 6, 0.4);
    }

    /* Global Footer */
    .site-footer {
      background-color: #060911;
      color: #94A3B8;
      font-size: 0.875rem;
      padding: 80px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 64px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.8;
      color: #64748B;
      margin-bottom: 20px;
    }
    .footer-col h5 {
      font-size: 1rem;
      font-weight: 600;
      color: #F8FAFC;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a:hover {
      color: #F59E0B;
    }
    .footer-contact-item {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 14px;
    }
    .footer-contact-item span.title {
      font-size: 0.75rem;
      color: #64748B;
      text-transform: uppercase;
    }
    .footer-contact-item span.val {
      color: #CBD5E1;
      font-weight: 500;
    }
    .footer-bottom {
      padding-top: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 20px;
      font-size: 0.8125rem;
      color: #64748B;
    }
    .footer-copy a {
      color: #94A3B8;
    }
    .footer-copy a:hover {
      color: #F59E0B;
    }

    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .overview-grid, .philosophy-wrap, .cta-banner-wrap {
        grid-template-columns: 1fr;
      }
      .grid-6-cards {
        grid-template-columns: repeat(2, 1fr);
      }
      .products-grid, .testimonial-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .eco-logos-wrap {
        grid-template-columns: repeat(3, 1fr);
      }
      .metric-strip-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 64px 0;
      }
      .top-bar {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        background: #0F172A;
        flex-direction: column;
        align-items: flex-start;
        padding: 32px 24px;
        gap: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        display: none;
      }
      .nav-menu.open {
        display: flex;
      }
      .header-cta .btn-outline {
        display: none;
      }
      .grid-6-cards, .scenarios-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .metric-strip-grid {
        grid-template-columns: 1fr;
      }
      .hero-meta-stats {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-banner-wrap {
        padding: 36px 24px;
      }
    }