/* roulang page: index */
:root {
      --primary: #0D1117;
      --accent: #FF5722;
      --accent-hover: #F4511E;
      --secondary: #00B4D8;
      --surface: #F8F9FA;
      --surface-card: #FFFFFF;
      --border: #E5E7EB;
      --border-dark: rgba(255, 255, 255, 0.08);
      --text-main: #111827;
      --text-muted: #4B5563;
      --text-light: #9CA3AF;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Inter", "Segoe UI", sans-serif;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px rgba(0,0,0,0.05);
      --shadow-lg: 0 16px 36px rgba(0,0,0,0.08);
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

    body {
      font-family: var(--font-stack);
      background-color: #FFFFFF;
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部两行导航 */
    .topbar {
      background-color: #0B0E14;
      color: #9CA3AF;
      font-size: 12px;
      height: 38px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      display: flex;
      align-items: center;
    }
    .topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .topbar-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .topbar-badge {
      background-color: var(--accent);
      color: #fff;
      font-size: 10px;
      font-weight: 700;
      padding: 1px 6px;
      border-radius: 2px;
      letter-spacing: 0.5px;
    }
    .topbar-info {
      display: flex;
      gap: 20px;
    }

    .main-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      height: 74px;
      display: flex;
      align-items: center;
      transition: var(--transition);
    }
    .main-header .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 19px;
      letter-spacing: -0.02em;
      color: var(--primary);
    }
    .brand-logo .logo-mark {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, #0D1117 0%, #1F2937 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 900;
      border: 1px solid rgba(255, 87, 34, 0.4);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }
    .nav-item a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 8px 0;
    }
    .nav-item a:hover,
    .nav-item.active a {
      color: var(--text-main);
    }
    .nav-item a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: var(--transition);
    }
    .nav-item a:hover::after,
    .nav-item.active a::after {
      width: 100%;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
      padding: 11px 22px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
      min-height: 44px;
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 87, 34, 0.25);
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(255, 87, 34, 0.35);
    }
    .btn-outline {
      border-color: var(--border);
      background-color: #FFFFFF;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--text-main);
      background-color: var(--surface);
    }
    .btn-dark {
      background-color: #1F2937;
      color: #FFFFFF;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .btn-dark:hover {
      background-color: #374151;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 板块排版公用 */
    .section {
      padding: 96px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--surface);
    }
    .section-dark {
      background-color: #0F141C;
      color: #F9FAFB;
    }
    .section-header {
      margin-bottom: 56px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--accent);
      background: rgba(255, 87, 34, 0.08);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
    }
    .section-dark .section-tag {
      background: rgba(255, 87, 34, 0.2);
      color: #FF7043;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.02em;
      color: var(--text-main);
      margin-bottom: 18px;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .section-dark .section-desc {
      color: #9CA3AF;
    }

    /* 01. 首屏 Hero */
    .hero-section {
      padding: 70px 0 90px;
      background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
      border-bottom: 1px solid var(--border);
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
    }
    .hero-headline {
      font-size: 46px;
      font-weight: 900;
      line-height: 1.2;
      letter-spacing: -0.03em;
      color: var(--text-main);
      margin-bottom: 24px;
    }
    .hero-subtext {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.8;
      max-width: 620px;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .hero-stats-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      padding-top: 28px;
      border-top: 1px solid var(--border);
    }
    .hero-stat-item .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      display: block;
      line-height: 1.1;
      font-variant-numeric: tabular-nums;
    }
    .hero-stat-item .stat-label {
      font-size: 13px;
      color: var(--text-light);
      margin-top: 4px;
    }
    .hero-visual {
      position: relative;
    }
    .hero-visual-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 16px;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }
    .hero-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      aspect-ratio: 16/10;
      position: relative;
    }
    .hero-status-tag {
      position: absolute;
      top: 26px;
      right: 26px;
      background: rgba(13, 17, 23, 0.85);
      backdrop-filter: blur(8px);
      color: #fff;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      font-size: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10B981;
      box-shadow: 0 0 8px #10B981;
    }

    /* 02. 痛点洞察 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-top: 3px solid #EF4444;
      border-radius: var(--radius-md);
      padding: 28px 22px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .pain-idx {
      font-size: 13px;
      font-weight: 700;
      color: #EF4444;
      margin-bottom: 12px;
      display: inline-block;
    }
    .pain-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .pain-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 03. 解决方案架构 */
    .arch-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .arch-preview {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
    }
    .arch-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .arch-item {
      display: flex;
      gap: 18px;
      padding: 20px;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      transition: var(--transition);
    }
    .arch-item:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-sm);
    }
    .arch-icon {
      width: 44px;
      height: 44px;
      flex-shrink: 0;
      background: var(--surface);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: var(--primary);
      font-weight: 800;
      border: 1px solid var(--border);
    }
    .arch-content h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .arch-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 04. 六维核心优势 */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .advantage-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: var(--transition);
      position: relative;
    }
    .advantage-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .adv-num {
      font-size: 13px;
      font-weight: 800;
      color: var(--accent);
      letter-spacing: 0.05em;
      margin-bottom: 14px;
      display: block;
    }
    .adv-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .adv-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 05. 产品矩阵 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .product-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .product-thumb {
      height: 200px;
      position: relative;
      background-color: #1F2937;
    }
    .product-body {
      padding: 28px 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-type {
      font-size: 12px;
      font-weight: 700;
      color: var(--secondary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .product-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .product-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex: 1;
    }
    .product-specs {
      list-style: none;
      padding-top: 16px;
      border-top: 1px solid var(--border);
      margin-bottom: 24px;
    }
    .product-specs li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 6px;
      display: flex;
      justify-content: space-between;
    }
    .product-specs li span:last-child {
      font-weight: 600;
      color: var(--text-main);
    }

    /* 06. 深色技术底座 */
    .tech-core-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 56px;
      align-items: center;
    }
    .tech-pillars {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 36px;
    }
    .pillar-box {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-dark);
      padding: 22px;
      border-radius: var(--radius-md);
    }
    .pillar-box h4 {
      font-size: 16px;
      color: #FFFFFF;
      margin-bottom: 8px;
    }
    .pillar-box p {
      font-size: 13px;
      color: #9CA3AF;
      line-height: 1.6;
    }
    .compliance-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 36px;
      backdrop-filter: blur(10px);
    }
    .compliance-card h3 {
      font-size: 20px;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .compliance-list {
      list-style: none;
      margin-top: 20px;
    }
    .compliance-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: #D1D5DB;
      padding: 10px 0;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .badge-iso {
      display: inline-block;
      font-size: 11px;
      background: rgba(0, 180, 216, 0.15);
      color: var(--secondary);
      padding: 2px 8px;
      border-radius: 2px;
      font-weight: 700;
    }

    /* 07. 方法步骤 */
    .steps-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .steps-flow::before {
      content: '';
      position: absolute;
      top: 36px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: var(--border);
      z-index: 0;
    }
    .step-card {
      position: relative;
      z-index: 1;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px 20px 24px;
      text-align: center;
    }
    .step-dot {
      width: 44px;
      height: 44px;
      background: #FFFFFF;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
      margin: 0 auto 20px;
      box-shadow: 0 0 0 6px #FFFFFF;
    }
    .step-card:hover .step-dot {
      background: var(--primary);
      color: #FFFFFF;
    }
    .step-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 08. 适用人群与业务场景 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scenario-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .scenario-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .scenario-badge {
      align-self: flex-start;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 8px;
      background: var(--surface);
      color: var(--text-muted);
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      border: 1px solid var(--border);
    }
    .scenario-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .scenario-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .scenario-footer {
      margin-top: auto;
      font-size: 12px;
      font-weight: 600;
      color: var(--accent);
    }

    /* 09. 标杆案例 */
    .case-box {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1fr 1.1fr;
    }
    .case-media {
      position: relative;
      background-color: #111827;
    }
    .case-content {
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .case-meta {
      display: flex;
      gap: 12px;
      margin-bottom: 16px;
    }
    .case-tag {
      font-size: 12px;
      color: var(--accent);
      font-weight: 700;
      background: rgba(255,87,34,0.08);
      padding: 2px 8px;
      border-radius: 2px;
    }
    .case-title {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .case-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .case-kpi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid var(--border);
    }
    .case-kpi h5 {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 4px;
    }
    .case-kpi p {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 10. 效能统计条 */
    .metrics-section {
      background: linear-gradient(135deg, #0D1117 0%, #161F2E 100%);
      color: #FFFFFF;
      padding: 64px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
    }
    .metric-col {
      border-left: 2px solid rgba(255, 87, 34, 0.4);
      padding-left: 20px;
    }
    .metric-value {
      font-size: 40px;
      font-weight: 900;
      letter-spacing: -0.03em;
      line-height: 1;
      margin-bottom: 8px;
      color: #FFFFFF;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .metric-value .unit {
      font-size: 18px;
      color: var(--accent);
      font-weight: 700;
    }
    .metric-title {
      font-size: 14px;
      font-weight: 600;
      color: #E5E7EB;
      margin-bottom: 4px;
    }
    .metric-detail {
      font-size: 12px;
      color: #9CA3AF;
      line-height: 1.5;
    }

    /* 11. 客户证言与行业评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .testi-quote-mark {
      font-size: 32px;
      font-weight: 900;
      color: var(--accent);
      line-height: 1;
      margin-bottom: 14px;
    }
    .testi-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
      flex: 1;
    }
    .testi-profile {
      padding-top: 16px;
      border-top: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testi-avatar-placeholder {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background: #0D1117;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .testi-author h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .testi-author p {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 12. 前沿洞察 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .insight-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .insight-img-wrap {
      height: 180px;
      overflow: hidden;
      background: #1F2937;
    }
    .insight-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .insight-card:hover .insight-img-wrap img {
      transform: scale(1.04);
    }
    .insight-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-date {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .insight-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .insight-snippet {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
      flex: 1;
    }
    .insight-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .insight-link:hover {
      color: var(--accent);
    }

    /* 13. FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border);
      background: #FFFFFF;
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item[open] {
      border-color: #D1D5DB;
      box-shadow: var(--shadow-sm);
    }
    .faq-header {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-header::-webkit-details-marker {
      display: none;
    }
    .faq-icon {
      font-size: 18px;
      color: var(--text-light);
      font-weight: 400;
      transition: var(--transition);
    }
    .faq-item[open] .faq-icon {
      transform: rotate(45deg);
      color: var(--accent);
    }
    .faq-content {
      padding: 0 24px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
      border-top: 1px solid #F3F4F6;
      padding-top: 16px;
    }

    /* 14. 转化收口 */
    .conversion-box {
      background: linear-gradient(135deg, #0A0D12 0%, #161C24 100%);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .conversion-left h2 {
      font-size: 32px;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.25;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .conversion-left p {
      font-size: 15px;
      color: #9CA3AF;
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .conversion-checks {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .conversion-checks li {
      font-size: 13px;
      color: #D1D5DB;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .check-icon {
      color: #10B981;
      font-weight: 800;
    }
    .conversion-form {
      background: #FFFFFF;
      padding: 32px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      color: var(--text-main);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      height: 42px;
      padding: 0 14px;
      font-size: 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      color: var(--text-main);
      background-color: #FAFAFA;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #FFFFFF;
    }
    .form-security-note {
      font-size: 11px;
      color: var(--text-light);
      margin-top: 12px;
      text-align: center;
      line-height: 1.4;
    }

    /* Footer */
    .site-footer {
      background-color: #070A0E;
      color: #9CA3AF;
      padding: 72px 0 36px;
      border-top: 1px solid rgba(255,255,255,0.06);
      font-size: 13px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand h3 {
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 14px;
      letter-spacing: -0.01em;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      color: #9CA3AF;
      max-width: 320px;
    }
    .footer-links h4 {
      color: #FFFFFF;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-nav-list a:hover {
      color: #FFFFFF;
    }
    .footer-contact-item {
      margin-bottom: 10px;
      line-height: 1.6;
    }
    .footer-contact-item span {
      display: block;
      color: #E5E7EB;
      font-weight: 600;
    }
    .footer-bottom {
      padding-top: 32px;
      border-top: 1px solid rgba(255,255,255,0.06);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
      color: #6B7280;
    }
    .footer-domain {
      color: #9CA3AF;
      font-family: monospace;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid,
      .arch-layout,
      .tech-core-grid,
      .case-box,
      .conversion-box {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .grid-3x2,
      .product-grid,
      .testimonial-grid,
      .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .pain-grid,
      .steps-flow,
      .scenario-grid,
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .steps-flow::before {
        display: none;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        gap: 16px;
      }
      .nav-menu.open {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .topbar-info {
        display: none;
      }
      .section {
        padding: 60px 0;
      }
      .hero-headline {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .hero-stats-strip {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .pain-grid,
      .grid-3x2,
      .product-grid,
      .steps-flow,
      .scenario-grid,
      .metrics-grid,
      .testimonial-grid,
      .insights-grid,
      .footer-top {
        grid-template-columns: 1fr;
      }
      .case-content {
        padding: 28px 20px;
      }
      .case-kpi-grid {
        grid-template-columns: 1fr;
        gap: 12px;
      }
      .conversion-box {
        padding: 32px 20px;
      }
      .conversion-form {
        padding: 24px 16px;
      }
      .header-actions .btn {
        display: none;
      }
    }