/* roulang page: index */
:root {
      --primary: #0E2A2B;
      --primary-dark: #071718;
      --accent: #D4A373;
      --accent-light: #E5BA93;
      --accent-glow: rgba(212, 163, 115, 0.25);
      --bg-light: #F7F8F9;
      --bg-white: #FFFFFF;
      --bg-dark: #0B1315;
      --text-main: #1A2022;
      --text-muted: #5A6568;
      --border-color: #E2E6E8;
      --border-dark: #1E2D30;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 16px rgba(14, 42, 43, 0.05);
      --shadow-md: 0 10px 30px -4px rgba(14, 42, 43, 0.08);
      --shadow-glow: 0 12px 36px rgba(212, 163, 115, 0.18);
      --transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
      --container: 1240px;
    }

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

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

    body {
      font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Inter", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    ul, ol {
      list-style: none;
    }

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

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

    /* 顶部通知条 */
    .top-bar {
      background: var(--primary-dark);
      color: #A6B4B6;
      font-size: 0.825rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 38px;
    }
    .top-bar-left {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .badge-protocol {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent);
      font-weight: 500;
    }
    .badge-protocol::before {
      content: "";
      width: 6px;
      height: 6px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }
    .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    /* 主导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(14, 42, 43, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      transition: var(--transition);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 74px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-mark {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--accent), #9C6B3E);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #071718;
      font-weight: 900;
      font-size: 1.15rem;
      box-shadow: var(--shadow-glow);
    }
    .brand-text {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #FFFFFF;
    }
    .brand-tag {
      font-size: 0.7rem;
      color: var(--accent-light);
      background: rgba(212, 163, 115, 0.15);
      padding: 2px 8px;
      border-radius: 4px;
      margin-left: 6px;
      border: 1px solid rgba(212, 163, 115, 0.3);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-link {
      color: #D2DCDD;
      font-size: 0.95rem;
      font-weight: 500;
      position: relative;
      padding: 8px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent-light);
    }
    .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-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn-gold {
      background: linear-gradient(135deg, var(--accent), #B37D46);
      color: #0A1C1D;
      font-weight: 600;
      font-size: 0.9rem;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 4px 14px rgba(212, 163, 115, 0.35);
      transition: var(--transition);
      cursor: pointer;
    }
    .btn-gold:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(212, 163, 115, 0.5);
      color: #050E0F;
    }

    .mobile-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      cursor: pointer;
    }
    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: #FFFFFF;
      transition: var(--transition);
    }

    /* 统一 Section 通用样式 */
    section {
      padding: 96px 0;
      position: relative;
    }
    .section-light {
      background-color: var(--bg-light);
    }
    .section-white {
      background-color: var(--bg-white);
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #ECF1F2;
    }
    .section-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }

    .section-header {
      max-width: 760px;
      margin: 0 auto 60px;
      text-align: center;
    }
    .sub-title-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--accent);
      background: rgba(212, 163, 115, 0.12);
      border: 1px solid rgba(212, 163, 115, 0.25);
      padding: 4px 14px;
      border-radius: 30px;
      margin-bottom: 16px;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      line-height: 1.25;
      margin-bottom: 18px;
      color: var(--primary);
    }
    .section-dark .section-title, .section-primary .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc, .section-primary .section-desc {
      color: #A2B5B8;
    }

    /* 板块 1: Hero Banner (黑金奢享会员卡片交互与沉浸视野) */
    .hero-section {
      position: relative;
      background-color: #071718;
      background-image: linear-gradient(135deg, rgba(7, 23, 24, 0.94), rgba(14, 42, 43, 0.86)), url('/assets/images/53accb478558b9c7.jpg');
      background-size: cover;
      background-position: center;
      padding: 110px 0 120px;
      overflow: hidden;
    }
    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 3.25rem;
      font-weight: 800;
      line-height: 1.16;
      color: #FFFFFF;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      background: linear-gradient(120deg, #FFFFFF 40%, var(--accent-light) 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.12rem;
      color: #B2C4C6;
      line-height: 1.8;
      margin-bottom: 36px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 18px;
      margin-bottom: 36px;
    }
    .btn-outline-light {
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.05);
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 500;
      transition: var(--transition);
    }
    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: #FFFFFF;
    }
    .hero-tags {
      display: flex;
      gap: 20px;
      font-size: 0.85rem;
      color: #8C9FA1;
    }
    .hero-tags span {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-tags span::before {
      content: "✓";
      color: var(--accent);
      font-weight: bold;
    }

    /* Hero 右侧黑金卡 */
    .vip-card-box {
      background: radial-gradient(circle at top right, #243E40, #0F1E20);
      border: 1px solid rgba(212, 163, 115, 0.35);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 0 24px rgba(212, 163, 115, 0.08);
      position: relative;
    }
    .vip-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 28px;
    }
    .vip-level-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(212, 163, 115, 0.15);
      color: var(--accent-light);
      border: 1px solid var(--accent);
      padding: 5px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    .vip-serial {
      color: #556D70;
      font-family: monospace;
      font-size: 0.85rem;
    }
    .vip-card-title {
      font-size: 1.45rem;
      color: #FFFFFF;
      margin-bottom: 12px;
      font-weight: 700;
    }
    .vip-card-desc {
      color: #9BB0B2;
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 24px;
    }
    .vip-card-status {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      background: rgba(0, 0, 0, 0.3);
      padding: 16px;
      border-radius: var(--radius-sm);
      margin-bottom: 24px;
      border: 1px solid rgba(255, 255, 255, 0.05);
    }
    .status-item span {
      display: block;
      font-size: 0.75rem;
      color: #799093;
    }
    .status-item strong {
      color: var(--accent-light);
      font-size: 1.1rem;
    }
    .vip-btn-row {
      display: flex;
      gap: 12px;
    }
    .vip-btn-row .btn-gold {
      flex: 1;
      justify-content: center;
    }

    /* 板块 2: 指标看板 (#metrics) */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .metric-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--accent);
      opacity: 0;
      transition: var(--transition);
    }
    .metric-card:hover::after {
      opacity: 1;
    }
    .metric-val {
      font-size: 3rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 10px;
      display: flex;
      align-items: baseline;
    }
    .metric-unit {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--accent);
      margin-left: 4px;
    }
    .metric-label {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .metric-sub {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块 3: 架构亮点图文 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .intro-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .intro-visual img {
      width: 100%;
      height: 480px;
      object-fit: cover;
      transition: transform 0.6s ease;
    }
    .intro-visual:hover img {
      transform: scale(1.03);
    }
    .intro-tag-box {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      background: rgba(14, 42, 43, 0.88);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(212, 163, 115, 0.3);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      color: #FFFFFF;
    }
    .intro-tag-box h4 {
      color: var(--accent-light);
      font-size: 0.95rem;
      margin-bottom: 4px;
    }
    .intro-tag-box p {
      font-size: 0.85rem;
      color: #C3D3D5;
      line-height: 1.4;
    }
    .tech-pill-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 24px 0 32px;
    }
    .tech-pill {
      background: #EAEFF0;
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid #D6DFE0;
    }

    /* 板块 4: 核心优势 6 卡网格 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }
    .adv-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(212, 163, 115, 0.4);
    }
    .adv-icon-badge {
      width: 52px;
      height: 52px;
      background: rgba(14, 42, 43, 0.05);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 22px;
      color: var(--primary);
      font-size: 1.35rem;
      font-weight: bold;
      border: 1px solid rgba(14, 42, 43, 0.1);
    }
    .adv-card:hover .adv-icon-badge {
      background: var(--primary);
      color: var(--accent);
    }
    .adv-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .adv-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 5: 热门智控终端产品 (#products) */
    .product-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(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .product-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .product-thumb {
      height: 240px;
      overflow: hidden;
      position: relative;
    }
    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .product-card:hover .product-thumb img {
      transform: scale(1.05);
    }
    .product-badge-float {
      position: absolute;
      top: 16px;
      right: 16px;
      background: rgba(14, 42, 43, 0.85);
      color: var(--accent-light);
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
      backdrop-filter: blur(4px);
    }
    .product-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-body h3 {
      font-size: 1.3rem;
      color: var(--primary);
      margin-bottom: 12px;
      font-weight: 700;
    }
    .product-body p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 24px;
      flex: 1;
    }
    .product-features {
      margin-bottom: 24px;
      border-top: 1px dashed var(--border-color);
      padding-top: 16px;
    }
    .product-features li {
      font-size: 0.85rem;
      color: #4A585B;
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .product-features li::before {
      content: "•";
      color: var(--accent);
      font-size: 1.2rem;
    }

    /* 板块 6: 架构技术对比矩阵 (#architecture) */
    .compare-table-wrapper {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 22px 28px;
      border-bottom: 1px solid #EDF1F2;
    }
    .compare-table th {
      background: #F2F5F6;
      color: var(--primary);
      font-weight: 700;
      font-size: 1rem;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .col-highlight {
      background: rgba(212, 163, 115, 0.08);
      color: var(--primary);
      font-weight: 600;
    }
    .tag-diff-win {
      color: #0E7044;
      font-weight: 700;
    }
    .tag-diff-lose {
      color: #8C999B;
    }

    /* 板块 7: 沉浸式深色生活美学 */
    .dark-vision-section {
      background-color: var(--bg-dark);
      background-image: radial-gradient(circle at 80% 20%, rgba(14, 42, 43, 0.6) 0%, transparent 60%);
      color: #ECF1F2;
      padding: 100px 0;
    }
    .dark-vision-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 50px;
      align-items: center;
    }
    .dark-vision-img {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-dark);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
    }
    .dark-vision-img img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }

    /* 板块 8: 典型全屋场景体验 - 时段卡联动 (#scenarios) */
    .scenario-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }
    .scenario-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }
    .scenario-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .scenario-time-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(212, 163, 115, 0.12);
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }
    .scenario-card h3 {
      font-size: 1.18rem;
      color: var(--primary);
      margin-bottom: 10px;
      font-weight: 700;
    }
    .scenario-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }
    .scenario-devices {
      font-size: 0.8rem;
      color: #6C7D80;
      border-top: 1px solid #EEF2F3;
      padding-top: 14px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .scenario-devices span {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .scenario-devices span::before {
      content: "↳";
      color: var(--accent);
    }

    /* 板块 9: 关键保障数据条 */
    .ticker-ribbon {
      background: linear-gradient(90deg, #0B1E1F, #0E2A2B, #163C3E);
      border-top: 1px solid rgba(212, 163, 115, 0.2);
      border-bottom: 1px solid rgba(212, 163, 115, 0.2);
      padding: 36px 0;
    }
    .ticker-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .ticker-item h4 {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--accent-light);
      margin-bottom: 6px;
      font-family: "Inter", sans-serif;
    }
    .ticker-item p {
      font-size: 0.9rem;
      color: #B5C6C8;
    }

    /* 板块 10: 真实家庭交互评价墙 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 32px 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .review-stars {
      color: var(--accent);
      font-size: 1rem;
      letter-spacing: 2px;
      margin-bottom: 16px;
    }
    .review-text {
      font-size: 0.95rem;
      color: #334042;
      line-height: 1.7;
      margin-bottom: 22px;
      font-style: italic;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #EEF2F3;
      padding-top: 16px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #DCE5E6;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 0.9rem;
    }
    .author-meta strong {
      display: block;
      font-size: 0.92rem;
      color: var(--primary);
    }
    .author-meta span {
      font-size: 0.8rem;
      color: #7D8E91;
    }

    /* 板块 11: 生态前沿技术资讯 (#insights) */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .insight-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .insight-cover {
      height: 200px;
      overflow: hidden;
    }
    .insight-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .insight-card:hover .insight-cover img {
      transform: scale(1.05);
    }
    .insight-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-badge {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--primary);
      background: #E8EFF0;
      padding: 3px 8px;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 12px;
    }
    .insight-content h3 {
      font-size: 1.15rem;
      color: var(--primary);
      line-height: 1.4;
      margin-bottom: 12px;
      font-weight: 700;
    }
    .insight-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex: 1;
    }
    .insight-btn {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--accent);
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块 12: 常见技术问题与解答 FAQ (#faq) */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--accent);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 22px 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--primary);
      user-select: none;
    }
    .faq-toggle-icon {
      font-size: 1.25rem;
      color: var(--accent);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
      background: #FAFCFC;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 28px 24px;
    }
    .faq-answer p {
      font-size: 0.95rem;
      color: #4D5C5E;
      line-height: 1.7;
    }

    /* 板块 13: 转化表单与底部预约 (#contact) */
    .contact-card-box {
      background: linear-gradient(135deg, #091C1D, #0E2A2B);
      border-radius: var(--radius-lg);
      border: 1px solid rgba(212, 163, 115, 0.3);
      padding: 60px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 50px;
      color: #FFFFFF;
    }
    .contact-form-side h2 {
      font-size: 2rem;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .contact-form-side p {
      font-size: 0.95rem;
      color: #A5B8BA;
      margin-bottom: 30px;
    }
    .smart-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .form-group-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-input {
      width: 100%;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      padding: 14px 18px;
      color: #FFFFFF;
      font-size: 0.95rem;
      transition: var(--transition);
    }
    .form-input:focus {
      border-color: var(--accent);
      background: rgba(255, 255, 255, 0.1);
    }
    .contact-qr-side {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      border-left: 1px solid rgba(255, 255, 255, 0.1);
      padding-left: 40px;
    }
    .qr-mock-box {
      width: 170px;
      height: 170px;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 12px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.4);
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border: 2px dashed var(--accent);
    }
    .qr-mock-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: 6px;
    }
    .qr-tip {
      font-size: 0.9rem;
      color: #E2ECEE;
      margin-bottom: 6px;
      font-weight: 600;
    }
    .qr-sub {
      font-size: 0.8rem;
      color: #8A9F02;
      color: #8C9FA1;
    }

    /* 统一页脚 Footer */
    .site-footer {
      background: #061112;
      color: #8C9FA1;
      padding: 80px 0 30px;
      border-top: 1px solid #142224;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 60px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.05rem;
      margin-bottom: 22px;
      font-weight: 700;
    }
    .footer-col p {
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-links li {
      margin-bottom: 12px;
    }
    .footer-links a:hover {
      color: var(--accent-light);
      padding-left: 4px;
    }
    .footer-contact-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-bottom: 12px;
      line-height: 1.5;
    }
    .footer-cert-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }
    .cert-pill {
      font-size: 0.75rem;
      background: #102123;
      border: 1px solid #1D3538;
      padding: 4px 10px;
      border-radius: 4px;
      color: #A3B7B9;
    }
    .footer-bottom {
      border-top: 1px solid #132224;
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: #617375;
    }
    .footer-bottom a {
      color: #617375;
    }
    .footer-bottom a:hover {
      color: #A3B7B9;
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .product-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dark-vision-grid {
        grid-template-columns: 1fr;
      }
      .contact-card-box {
        grid-template-columns: 1fr;
        padding: 40px;
      }
      .contact-qr-side {
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-left: 0;
        padding-top: 30px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .main-nav {
        position: fixed;
        top: 74px;
        left: 0;
        width: 100%;
        background: rgba(14, 42, 43, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 30px 24px;
        gap: 20px;
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      }
      .main-nav.active {
        transform: translateY(0);
      }
      .mobile-toggle {
        display: flex;
      }
      .header-actions .btn-gold {
        padding: 8px 16px;
        font-size: 0.8rem;
      }
      .hero-content h1 {
        font-size: 2.2rem;
      }
      .metrics-grid, .advantage-grid, .product-grid, .scenario-timeline, .reviews-grid, .insights-grid, .ticker-grid {
        grid-template-columns: 1fr;
      }
      .form-group-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      section {
        padding: 64px 0;
      }
      .section-title {
        font-size: 1.85rem;
      }
    }