/* roulang page: index */
:root {
      --primary: #0A58CA;
      --primary-hover: #084298;
      --primary-light: #E7F1FF;
      --accent-mint: #10B981;
      --dark-slate: #0B1120;
      --dark-surface: #131D31;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-sub: #94A3B8;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --border-color: #E2E8F0;
      --border-dark: rgba(255, 255, 255, 0.08);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 6px 24px -2px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 16px 36px -4px rgba(15, 23, 42, 0.12);
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      color: var(--text-main);
      background-color: var(--bg-white);
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

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

    /* 顶部双行导航系统 */
    .top-bar {
      background: var(--dark-slate);
      color: #CBD5E1;
      font-size: 0.85rem;
      border-bottom: 1px solid var(--border-dark);
      padding: 8px 0;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent-mint);
    }
    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-mint);
      box-shadow: 0 0 8px var(--accent-mint);
    }

    .site-header {
      position: sticky;
      top: 0;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      z-index: 1000;
      box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
      border-bottom: 1px solid var(--border-color);
    }
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.45rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--primary);
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--primary), #2563EB);
      color: #fff;
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 700;
    }
    .nav-links {
      display: flex;
      list-style: none;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      font-size: 0.98rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.6rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 24px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      gap: 8px;
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(10, 88, 202, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(10, 88, 202, 0.35);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }
    .btn-mint {
      background: var(--accent-mint);
      color: #FFFFFF;
    }
    .btn-mint:hover {
      background: #059669;
      transform: translateY(-2px);
    }

    /* 板块通用 */
    section {
      padding: 88px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-light);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-dark {
      background-color: var(--dark-slate);
      color: #FFFFFF;
    }
    .section-header {
      margin-bottom: 52px;
      max-width: 820px;
    }
    .section-header.center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .tag-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 999px;
      background: var(--primary-light);
      color: var(--primary);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .section-dark .tag-badge {
      background: rgba(16, 185, 129, 0.15);
      color: var(--accent-mint);
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      color: inherit;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 板块一：Hero Banner 卡片堆叠 */
    .hero-section {
      padding: 60px 0 90px;
      background: radial-gradient(circle at 10% 20%, rgba(10, 88, 202, 0.05) 0%, transparent 60%),
                  linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: rgba(10, 88, 202, 0.08);
      border: 1px solid rgba(10, 88, 202, 0.2);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
      color: var(--primary);
      margin-bottom: 24px;
      font-weight: 600;
    }
    .hero-title {
      font-size: 2.9rem;
      line-height: 1.25;
      font-weight: 800;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
      color: var(--text-main);
    }
    .hero-title span {
      background: linear-gradient(135deg, var(--primary) 0%, #2563EB 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.12rem;
      color: var(--text-muted);
      margin-bottom: 34px;
      line-height: 1.8;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      align-items: center;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .hero-metrics-pill {
      display: flex;
      align-items: center;
      gap: 28px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }
    .metric-pill-item strong {
      display: block;
      font-size: 1.35rem;
      color: var(--text-main);
      font-weight: 800;
    }
    .metric-pill-item span {
      font-size: 0.82rem;
      color: var(--text-sub);
    }
    /* 卡片堆叠视觉 (主卡 + 2张侧卡交错) */
    .hero-stack-container {
      position: relative;
      perspective: 1000px;
      min-height: 480px;
    }
    .stack-card {
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      background: #FFFFFF;
      overflow: hidden;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .stack-card-main {
      position: relative;
      z-index: 3;
      width: 90%;
      margin: 0 auto;
    }
    .stack-card-main img {
      width: 100%;
      height: 320px;
      object-fit: cover;
    }
    .stack-card-content {
      padding: 20px;
      background: #FFFFFF;
    }
    .stack-card-side-left {
      position: absolute;
      top: -24px;
      left: 0;
      width: 65%;
      z-index: 1;
      opacity: 0.9;
      transform: rotate(-4deg) translateY(10px);
      background: #0B1120;
      color: #FFFFFF;
      padding: 16px;
      border-color: rgba(255,255,255,0.1);
    }
    .stack-card-side-right {
      position: absolute;
      bottom: -20px;
      right: 0;
      width: 65%;
      z-index: 4;
      background: #FFFFFF;
      padding: 16px 20px;
      border: 1px solid var(--border-color);
      box-shadow: 0 12px 30px rgba(0,0,0,0.12);
      transform: rotate(3deg);
    }

    /* 板块二：产品与架构概述 (不对称图文) */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1.15fr;
      gap: 56px;
      align-items: center;
    }
    .overview-image-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .overview-image-wrap img {
      width: 100%;
      height: 440px;
      object-fit: cover;
    }
    .overview-badge-float {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      background: rgba(11, 17, 32, 0.88);
      backdrop-filter: blur(8px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      color: #fff;
      border: 1px solid rgba(255,255,255,0.15);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .overview-feature-list {
      list-style: none;
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .overview-feature-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .icon-box-sm {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    /* 板块三：核心卖点三连推进区 */
    .triad-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .triad-card {
      background: #FFFFFF;
      padding: 36px 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .triad-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .triad-icon-lg {
      font-size: 2.2rem;
      margin-bottom: 20px;
      display: inline-block;
    }
    .triad-card h3 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .triad-metric {
      display: inline-block;
      margin-top: 16px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--accent-mint);
      background: rgba(16, 185, 129, 0.1);
      padding: 4px 10px;
      border-radius: 4px;
    }

    /* 板块四：核心优势矩阵 (2x3网格) */
    .grid-2x3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .matrix-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .matrix-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .matrix-index {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
    }
    .matrix-tag {
      font-size: 0.75rem;
      background: var(--bg-light);
      padding: 2px 8px;
      border-radius: 4px;
      color: var(--text-muted);
    }
    .matrix-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .matrix-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .matrix-stat {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }

    /* 板块五：热门产品与系统方案区 (3卡片并列) */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      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-card-thumb {
      height: 200px;
      overflow: hidden;
    }
    .product-card-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-card-thumb img {
      transform: scale(1.05);
    }
    .product-card-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .product-badges {
      display: flex;
      gap: 6px;
      margin-bottom: 12px;
    }
    .product-badge-item {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 4px;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 600;
    }
    .product-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .product-check-list {
      list-style: none;
      margin: 16px 0 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      flex-grow: 1;
    }
    .product-check-list li {
      font-size: 0.88rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-check-list li::before {
      content: '✓';
      color: var(--accent-mint);
      font-weight: bold;
    }

    /* 板块六：深色沉浸式全景案例与技术理念 */
    .immersion-wrapper {
      background: url('/assets/images/aa86c1ec59da9c50.webp') center/cover no-repeat;
      position: relative;
    }
    .immersion-overlay {
      position: absolute;
      inset: 0;
      background: rgba(11, 17, 32, 0.92);
    }
    .immersion-content {
      position: relative;
      z-index: 2;
    }
    .immersion-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .immersion-visual-box {
      border: 1px solid var(--border-dark);
      background: rgba(19, 29, 49, 0.8);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    }
    .topo-header {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-dark);
      padding-bottom: 14px;
      margin-bottom: 20px;
      font-size: 0.85rem;
      color: var(--text-sub);
    }
    .topo-nodes {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }
    .topo-node-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.06);
      padding: 16px;
      border-radius: var(--radius-sm);
    }
    .topo-node-card strong {
      display: block;
      color: #FFFFFF;
      font-size: 0.95rem;
      margin-bottom: 4px;
    }
    .topo-node-card span {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* 板块七：多端运营场景演示 (Tab 切换) */
    .tab-nav-wrapper {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .tab-btn {
      padding: 12px 24px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 40px;
      cursor: pointer;
      font-weight: 600;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .tab-btn.active, .tab-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
      box-shadow: 0 4px 12px rgba(10,88,202,0.25);
    }
    .tab-pane {
      display: none;
    }
    .tab-pane.active {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 40px;
      align-items: center;
      animation: fadeIn 0.3s ease-in-out;
    }
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(6px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .tab-media-frame {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .tab-media-frame img {
      width: 100%;
      height: 360px;
      object-fit: cover;
    }
    .workflow-steps {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 20px;
    }
    .workflow-step-item {
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .step-num {
      width: 28px;
      height: 28px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.85rem;
      flex-shrink: 0;
    }

    /* 板块八：真实客户业务故事 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1.15fr;
      gap: 48px;
      align-items: center;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .story-img-col img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .story-content-col {
      padding: 40px;
    }
    .story-meta-tags {
      display: flex;
      gap: 10px;
      margin-bottom: 16px;
    }
    .story-tag {
      font-size: 0.8rem;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 4px;
      background: #F1F5F9;
      color: var(--text-muted);
    }
    .story-content-col h3 {
      font-size: 1.55rem;
      font-weight: 800;
      line-height: 1.4;
      margin-bottom: 16px;
    }
    .story-quote {
      font-size: 0.96rem;
      color: var(--text-muted);
      border-left: 3px solid var(--primary);
      padding-left: 16px;
      margin: 20px 0;
      font-style: italic;
    }
    .story-results-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
    }
    .result-item strong {
      display: block;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
    }
    .result-item span {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* 板块九：运行数据统计条 */
    .metric-strip-section {
      background: linear-gradient(135deg, var(--dark-slate) 0%, #172554 100%);
      color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .metric-strip-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-cell {
      padding: 0 16px;
      border-right: 1px solid rgba(255,255,255,0.1);
    }
    .metric-cell:last-child {
      border-right: none;
    }
    .metric-num {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--accent-mint);
      line-height: 1.2;
      margin-bottom: 8px;
      font-family: inherit;
    }
    .metric-title {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* 板块十：标杆客户口碑 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .testimonial-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .stars-row {
      color: #F59E0B;
      font-size: 1.1rem;
      letter-spacing: 2px;
      margin-bottom: 16px;
    }
    .testimonial-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .author-info {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 18px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .author-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-role {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* 板块十一：技术资讯内嵌卡片 */
    .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: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .news-cover {
      height: 190px;
      overflow: hidden;
    }
    .news-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-cover img {
      transform: scale(1.05);
    }
    .news-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-sub);
      margin-bottom: 8px;
    }
    .news-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      line-height: 1.45;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .news-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块十二：FAQ 手风琴折叠面板 */
    .faq-container {
      max-width: 880px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: 0 4px 16px rgba(10, 88, 202, 0.08);
    }
    .faq-header {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      font-size: 1.05rem;
      user-select: none;
      background: #FFFFFF;
      transition: background 0.2s ease;
    }
    .faq-item.active .faq-header {
      background: var(--primary-light);
      color: var(--primary);
    }
    .faq-icon {
      font-size: 1.25rem;
      transition: transform 0.28s ease;
      color: var(--text-muted);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #FFFFFF;
    }
    .faq-body-inner {
      padding: 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px solid var(--border-color);
    }

    /* 板块十三：交付承诺与安全保障条 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-card {
      background: #FFFFFF;
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      transition: var(--transition);
    }
    .guarantee-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent-mint);
    }
    .guarantee-icon {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: rgba(16, 185, 129, 0.12);
      color: var(--accent-mint);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin: 0 auto 16px;
      font-weight: bold;
    }
    .guarantee-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .guarantee-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 底部固定转化浮条 */
    .sticky-cta-bar {
      position: fixed;
      bottom: -100px;
      left: 0;
      width: 100%;
      background: rgba(11, 17, 32, 0.95);
      backdrop-filter: blur(12px);
      border-top: 1px solid var(--border-dark);
      padding: 14px 0;
      z-index: 999;
      box-shadow: 0 -8px 24px rgba(0,0,0,0.25);
      transition: bottom 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .sticky-cta-bar.visible {
      bottom: 0;
    }
    .sticky-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .sticky-text {
      color: #FFFFFF;
    }
    .sticky-text strong {
      display: block;
      font-size: 1.05rem;
      color: #FFFFFF;
    }
    .sticky-text span {
      font-size: 0.85rem;
      color: var(--text-sub);
    }
    .sticky-actions {
      display: flex;
      gap: 12px;
      align-items: center;
    }

    /* 页脚 */
    .site-footer {
      background: #060913;
      color: #94A3B8;
      padding: 72px 0 32px;
      border-top: 1px solid var(--border-dark);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.35rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 20px;
      position: relative;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }
    .footer-contact-info {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-bottom {
      padding-top: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .hero-grid, .overview-grid, .immersion-grid, .tab-pane.active, .story-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .triad-grid, .grid-2x3, .product-grid, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-strip-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .metric-cell {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .hero-title {
        font-size: 2.3rem;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: 0 16px 24px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .header-actions .btn {
        display: none;
      }
      .triad-grid, .grid-2x3, .product-grid, .testimonial-grid, .news-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .metric-strip-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.95rem;
      }
      section {
        padding: 56px 0;
      }
      .story-results-row {
        grid-template-columns: 1fr;
      }
      .sticky-cta-bar {
        padding: 12px 0 20px;
      }
      .sticky-text {
        display: none;
      }
      .sticky-bar-inner {
        justify-content: center;
        width: 100%;
      }
      .sticky-actions {
        width: 100%;
        justify-content: space-around;
      }
      .sticky-actions .btn {
        flex: 1;
      }
    }