/* roulang page: index */
:root {
      --primary: #0052D9;
      --primary-hover: #003cab;
      --accent-green: #00A870;
      --accent-orange: #FF7D00;
      --dark-surface: #0A1118;
      --dark-card: #121C26;
      --dark-border: #1E2D3D;
      --light-bg: #F4F7FA;
      --white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --radius-lg: 20px;
      --radius-md: 12px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 12px rgba(0, 82, 217, 0.04);
      --shadow-base: 0 10px 30px -10px rgba(0, 82, 217, 0.08);
      --shadow-hover: 0 20px 40px -12px rgba(0, 82, 217, 0.16);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font-sans);
      color: var(--text-main);
      background-color: var(--light-bg);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .top-bar {
      background-color: var(--dark-surface);
      color: var(--text-light);
      font-size: 0.85rem;
      border-bottom: 1px solid var(--dark-border);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 40px;
    }
    .top-info-group {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .top-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent-green);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      box-shadow: var(--shadow-sm);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-icon {
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-green) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--white);
      font-weight: 800;
      font-size: 1.25rem;
      box-shadow: 0 4px 10px rgba(0, 82, 217, 0.3);
    }
    .logo-text {
      display: flex;
      flex-direction: column;
    }
    .logo-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      line-height: 1.2;
    }
    .logo-sub {
      font-size: 0.72rem;
      color: var(--text-muted);
      letter-spacing: 0.5px;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      font-weight: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      font-size: 0.95rem;
      gap: 8px;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #1664e8 100%);
      color: var(--white);
      box-shadow: 0 6px 16px rgba(0, 82, 217, 0.28);
    }
    .btn-primary:hover {
      box-shadow: 0 10px 24px rgba(0, 82, 217, 0.4);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background: var(--white);
      color: var(--text-main);
      border: 1px solid var(--border-color);
    }
    .btn-secondary:hover {
      background: #F8FAFC;
      border-color: #CBD5E1;
      transform: translateY(-2px);
    }
    .btn-accent {
      background: linear-gradient(135deg, var(--accent-orange) 0%, #ff9800 100%);
      color: var(--white);
      box-shadow: 0 6px 16px rgba(255, 125, 0, 0.28);
    }
    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(255, 125, 0, 0.4);
    }
    .btn-green {
      background: linear-gradient(135deg, var(--accent-green) 0%, #00c784 100%);
      color: var(--white);
    }
    .section-wrap {
      padding: 80px 0;
    }
    .section-dark {
      background-color: var(--dark-surface);
      color: var(--white);
      position: relative;
    }
    .section-white {
      background-color: var(--white);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(0, 82, 217, 0.08);
      color: var(--primary);
      border-radius: var(--radius-full);
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
      border: 1px solid rgba(0, 82, 217, 0.15);
    }
    .section-tag.tag-dark {
      background: rgba(0, 168, 112, 0.15);
      color: var(--accent-green);
      border-color: rgba(0, 168, 112, 0.3);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: var(--text-light);
    }
    .badge-pill {
      display: inline-flex;
      align-items: center;
      padding: 4px 10px;
      font-size: 0.78rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      background: rgba(0, 168, 112, 0.1);
      color: var(--accent-green);
      border: 1px solid rgba(0, 168, 112, 0.2);
    }

    /* 1. Hero 杂志分栏首屏 */
    .hero-section {
      background: radial-gradient(circle at top right, rgba(0, 82, 217, 0.06), transparent 50%),
                  radial-gradient(circle at bottom left, rgba(0, 168, 112, 0.05), transparent 40%),
                  #ffffff;
      padding: 70px 0 80px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-badge-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 18px;
    }
    .hero-tag {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-green) 100%);
      color: var(--white);
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: var(--radius-full);
    }
    .hero-tag-text {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-muted);
    }
    .hero-title {
      font-size: 2.85rem;
      font-weight: 900;
      letter-spacing: -1px;
      line-height: 1.22;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    .hero-title span {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-green) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }
    .hero-stat-item h4 {
      font-size: 1.65rem;
      font-weight: 800;
      color: var(--primary);
    }
    .hero-stat-item p {
      font-size: 0.82rem;
      color: var(--text-muted);
      margin-top: 2px;
    }
    .hero-featured-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .hero-card-img-wrap {
      position: relative;
      height: 240px;
      overflow: hidden;
    }
    .hero-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .hero-featured-card:hover .hero-card-img-wrap img {
      transform: scale(1.04);
    }
    .hero-card-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(10, 17, 24, 0.85);
      backdrop-filter: blur(6px);
      color: var(--white);
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    .hero-card-body {
      padding: 24px;
      background: var(--white);
    }
    .hero-card-body h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .hero-card-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.6;
    }
    .hero-indicators {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
      background: var(--light-bg);
      padding: 12px;
      border-radius: var(--radius-md);
      font-size: 0.82rem;
    }
    .hero-indicator-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .hero-indicator-item span:first-child {
      color: var(--text-muted);
    }
    .hero-indicator-item span:last-child {
      font-weight: 700;
      color: var(--accent-green);
    }

    /* 2. 合集目录（模块与子系统索引） */
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .catalog-item {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .catalog-item:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .catalog-num {
      font-size: 1.5rem;
      font-weight: 900;
      color: rgba(0, 82, 217, 0.2);
      margin-bottom: 8px;
    }
    .catalog-item h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .catalog-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .catalog-footer {
      margin-top: 16px;
      padding-top: 12px;
      border-top: 1px dashed var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--primary);
    }

    /* 3. 系统架构与硬件集成介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .intro-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-base);
    }
    .intro-visual img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .intro-visual-badge {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(10, 17, 24, 0.85);
      backdrop-filter: blur(8px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--white);
    }
    .intro-visual-badge h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .intro-visual-badge p {
      font-size: 0.82rem;
      color: var(--text-light);
    }
    .intro-content h3 {
      font-size: 1.85rem;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .intro-content p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .intro-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 28px;
    }
    .intro-feature-item {
      background: var(--light-bg);
      padding: 14px 16px;
      border-radius: var(--radius-md);
      border-left: 3px solid var(--primary);
    }
    .intro-feature-item strong {
      display: block;
      font-size: 0.92rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .intro-feature-item span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 4. 核心优势六维矩阵 */
    .strengths-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .strength-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }
    .strength-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: rgba(0, 82, 217, 0.3);
    }
    .strength-icon-box {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      background: rgba(0, 82, 217, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .strength-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .strength-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 5. 服务矩阵与爆款方案 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .product-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .product-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .product-img-wrap {
      height: 200px;
      position: relative;
      overflow: hidden;
    }
    .product-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-img-wrap img {
      transform: scale(1.05);
    }
    .product-body {
      padding: 28px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .product-body h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .product-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .product-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }
    .product-tag {
      font-size: 0.78rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: var(--light-bg);
      color: var(--text-muted);
    }

    /* 6. 运营指标结果对比区 (新旧模式) */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      max-width: 1100px;
      margin: 0 auto;
    }
    .compare-box {
      border-radius: var(--radius-lg);
      padding: 36px;
      position: relative;
    }
    .compare-old {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
    }
    .compare-smart {
      background: linear-gradient(145deg, #0f1c2e 0%, #15273d 100%);
      color: var(--white);
      border: 1px solid rgba(0, 168, 112, 0.4);
      box-shadow: 0 15px 35px rgba(0, 82, 217, 0.2);
    }
    .compare-badge {
      display: inline-block;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-size: 0.8rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .compare-old .compare-badge {
      background: #E2E8F0;
      color: var(--text-muted);
    }
    .compare-smart .compare-badge {
      background: var(--accent-green);
      color: var(--white);
    }
    .compare-title {
      font-size: 1.35rem;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .compare-list-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.92rem;
    }
    .compare-list-item strong {
      display: block;
      margin-bottom: 2px;
    }
    .compare-old .compare-list-item {
      color: var(--text-muted);
    }
    .compare-smart .compare-list-item {
      color: #CBD5E1;
    }

    /* 7. 深色物联中台架构区 */
    .ioc-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: center;
    }
    .ioc-screen-mock {
      background: var(--dark-card);
      border: 1px solid var(--dark-border);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    }
    .ioc-screen-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--dark-border);
      padding-bottom: 14px;
      margin-bottom: 18px;
    }
    .ioc-screen-top span {
      font-size: 0.85rem;
      color: var(--accent-green);
      font-weight: 600;
    }
    .ioc-grid-mini {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-bottom: 18px;
    }
    .ioc-mini-card {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--dark-border);
      border-radius: 8px;
      padding: 12px;
      text-align: center;
    }
    .ioc-mini-card h5 {
      font-size: 0.78rem;
      color: var(--text-light);
      font-weight: normal;
    }
    .ioc-mini-card strong {
      font-size: 1.2rem;
      color: var(--white);
      display: block;
      margin-top: 4px;
    }
    .ioc-img-box {
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--dark-border);
    }
    .ioc-img-box img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .ioc-detail-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .ioc-detail-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--dark-border);
      padding: 18px 20px;
      border-radius: var(--radius-md);
      transition: all 0.3s ease;
    }
    .ioc-detail-item:hover {
      border-color: var(--primary);
      background: rgba(0, 82, 217, 0.05);
    }
    .ioc-detail-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 6px;
    }
    .ioc-detail-item p {
      font-size: 0.88rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* 8. 标杆落地里程碑时间轴 */
    .timeline-wrap {
      position: relative;
      max-width: 960px;
      margin: 0 auto;
    }
    .timeline-wrap::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: var(--border-color);
      transform: translateX(-50%);
    }
    .timeline-node {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      margin-bottom: 40px;
      position: relative;
      align-items: center;
    }
    .timeline-node:last-child {
      margin-bottom: 0;
    }
    .timeline-dot {
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: var(--primary);
      border: 4px solid var(--white);
      box-shadow: 0 0 0 2px var(--primary);
      z-index: 2;
    }
    .timeline-content {
      background: var(--white);
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .timeline-node:nth-child(even) .timeline-content {
      grid-column: 2;
    }
    .timeline-node:nth-child(even) .timeline-date {
      grid-column: 1;
      text-align: right;
    }
    .timeline-date {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--primary);
    }
    .timeline-content h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .timeline-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 9. 关键数据统计条 */
    .metrics-bar-section {
      background: linear-gradient(135deg, #0052D9 0%, #00875A 100%);
      color: var(--white);
      padding: 50px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-stat-item h3 {
      font-size: 2.5rem;
      font-weight: 900;
      margin-bottom: 6px;
      letter-spacing: -0.5px;
    }
    .metric-stat-item p {
      font-size: 0.95rem;
      opacity: 0.9;
    }

    /* 10. 用户口碑与实景评价墙 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-quote {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 14px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--light-bg);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--primary);
    }
    .review-meta h5 {
      font-size: 0.95rem;
      font-weight: 700;
    }
    .review-meta span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 11. 行业动态与技术资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--white);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date-tag {
      display: flex;
      justify-content: space-between;
      font-size: 0.78rem;
      color: var(--text-light);
      margin-bottom: 10px;
    }
    .news-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }
    .news-link {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 12. 平台保障与服务承诺 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-item {
      background: var(--white);
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
    }
    .guarantee-icon {
      width: 48px;
      height: 48px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: rgba(0, 168, 112, 0.1);
      color: var(--accent-green);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 800;
    }
    .guarantee-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .guarantee-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 13. 快速解答与常见问题 FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.25s ease;
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-header {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.05rem;
      user-select: none;
    }
    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .faq-body {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-body {
      padding: 0 24px 20px;
      max-height: 300px;
    }

    /* 14. 场景化方案定制与唯一转化表单 */
    .cta-form-wrapper {
      background: linear-gradient(135deg, #0A1118 0%, #152332 100%);
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      border: 1px solid var(--dark-border);
      box-shadow: var(--shadow-hover);
      color: var(--white);
    }
    .cta-grid {
      display: grid;
      grid-template-columns: 1fr 1.15fr;
      gap: 48px;
      align-items: center;
    }
    .cta-left h3 {
      font-size: 2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .cta-left p {
      font-size: 0.95rem;
      color: var(--text-light);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .cta-benefits {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .cta-benefit-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.9rem;
      color: #E2E8F0;
    }
    .cta-benefit-item span.dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-green);
    }
    .smart-form {
      background: rgba(255, 255, 255, 0.04);
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .form-group-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 16px;
    }
    .form-field {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 16px;
    }
    .form-field label {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-light);
    }
    .form-input, .form-select {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--dark-border);
      background: rgba(10, 17, 24, 0.7);
      color: var(--white);
      outline: none;
      transition: border-color 0.2s;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary);
    }
    .form-tip {
      font-size: 0.78rem;
      color: var(--text-light);
      margin-bottom: 18px;
    }
    .form-btn {
      width: 100%;
      padding: 14px;
      font-size: 1rem;
    }

    /* 页脚 Footer */
    .site-footer {
      background-color: var(--dark-surface);
      color: var(--text-light);
      padding: 64px 0 30px;
      border-top: 1px solid var(--dark-border);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--white);
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      font-size: 0.88rem;
      color: var(--text-light);
    }
    .footer-links a:hover {
      color: var(--accent-green);
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid var(--dark-border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
    }

    /* 移动端菜单按钮与抽屉 */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 8px;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-grid, .intro-grid, .ioc-layout, .cta-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .catalog-grid, .strengths-grid, .products-grid, .reviews-grid, .news-grid, .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.3rem;
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .main-nav {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
      }
      .main-nav.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .header-inner .btn-primary {
        display: none;
      }
      .catalog-grid, .strengths-grid, .products-grid, .reviews-grid, .news-grid, .guarantee-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .compare-container {
        grid-template-columns: 1fr;
      }
      .timeline-wrap::before {
        left: 20px;
      }
      .timeline-node {
        grid-template-columns: 1fr;
        gap: 12px;
        padding-left: 45px;
      }
      .timeline-dot {
        left: 20px;
        top: 24px;
      }
      .timeline-node:nth-child(even) .timeline-content,
      .timeline-node:nth-child(even) .timeline-date {
        grid-column: 1;
        text-align: left;
      }
      .form-group-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .section-title {
        font-size: 1.65rem;
      }
    }