/* roulang page: index */
:root {
      --primary: #00D2B4;
      --primary-hover: #00ba9f;
      --secondary: #583BE8;
      --accent: #FF5252;
      --bg-dark: #0A0D14;
      --bg-dark-card: #121824;
      --bg-light: #F7F9FC;
      --bg-white: #FFFFFF;
      --text-main: #1A202C;
      --text-muted: #4A5568;
      --text-light: #718096;
      --text-white: #F8FAFC;
      --border-color: #E2E8F0;
      --border-dark: rgba(255, 255, 255, 0.08);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 30px -5px rgba(0, 210, 180, 0.15);
      --container-width: 1240px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      font-size: 15px;
      line-height: 1.75;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

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

    /* 顶部工具行 */
    .utility-bar {
      background-color: #06080D;
      color: #94A3B8;
      font-size: 13px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
    }
    .utility-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
      display: inline-block;
    }
    .utility-links {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    /* 吸顶主导航 */
    .header-main {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 17px;
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--secondary);
    }
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-menu a:hover::after,
    .nav-menu a.active::after {
      width: 100%;
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #062420;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 15px rgba(0, 210, 180, 0.35);
    }
    .btn-secondary {
      background-color: var(--secondary);
      color: #ffffff;
    }
    .btn-secondary:hover {
      background-color: #492ec7;
      transform: translateY(-2px);
      box-shadow: 0 4px 15px rgba(88, 59, 232, 0.35);
    }
    .btn-outline {
      border-color: rgba(255, 255, 255, 0.25);
      color: #FFFFFF;
      background: transparent;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 板块通用 */
    .section-wrap {
      padding: 86px 0;
      position: relative;
    }
    .section-wrap.bg-white {
      background-color: var(--bg-white);
    }
    .section-wrap.bg-dark {
      background-color: var(--bg-dark);
      color: var(--text-white);
    }
    .section-wrap.bg-dark-alt {
      background-color: var(--bg-dark-card);
      color: var(--text-white);
    }
    .section-header {
      max-width: 820px;
      margin: 0 auto 52px;
      text-align: center;
    }
    .section-header.text-left {
      text-align: left;
      margin-left: 0;
    }
    .tag-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 210, 180, 0.12);
      color: #008774;
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 14px;
      letter-spacing: 0.04em;
    }
    .section-wrap.bg-dark .tag-badge,
    .section-wrap.bg-dark-alt .tag-badge {
      background: rgba(0, 210, 180, 0.18);
      color: var(--primary);
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .section-wrap.bg-dark .section-desc,
    .section-wrap.bg-dark-alt .section-desc {
      color: #94A3B8;
    }

    /* 板块 1: Hero 首屏 */
    .hero-section {
      position: relative;
      background-image: linear-gradient(rgba(10, 13, 20, 0.88), rgba(10, 13, 20, 0.94)), url('/assets/images/e6652e5f6769fe88.webp');
      background-size: cover;
      background-position: center;
      color: var(--text-white);
      padding: 100px 0 90px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 22px;
    }
    .hero-content h1 span {
      background: linear-gradient(135deg, #00D2B4 0%, #765CF5 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-p {
      font-size: 16px;
      line-height: 1.8;
      color: #CBD5E1;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-spec-strip {
      display: flex;
      gap: 28px;
      padding-top: 24px;
      border-top: 1px solid var(--border-dark);
    }
    .hero-spec-item strong {
      display: block;
      font-size: 20px;
      color: var(--primary);
    }
    .hero-spec-item span {
      font-size: 13px;
      color: #94A3B8;
    }
    .hero-stage-card {
      background: var(--bg-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .card-topbar {
      padding: 12px 18px;
      background: rgba(255, 255, 255, 0.04);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: #94A3B8;
      border-bottom: 1px solid var(--border-dark);
    }
    .card-topbar .live-tag {
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 600;
    }
    .live-dot-red {
      width: 7px;
      height: 7px;
      background-color: var(--accent);
      border-radius: 50%;
    }
    .hero-stage-media {
      position: relative;
    }
    .hero-stage-media img {
      width: 100%;
      height: 250px;
      object-fit: cover;
    }
    .stream-overlay-metrics {
      position: absolute;
      bottom: 12px;
      left: 12px;
      right: 12px;
      background: rgba(10, 13, 20, 0.85);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      display: flex;
      justify-content: space-around;
      font-size: 12px;
      color: #E2E8F0;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .stream-overlay-metrics b {
      color: var(--primary);
      margin-left: 4px;
    }
    .hero-stage-footer {
      padding: 18px;
      font-size: 13px;
      color: #94A3B8;
      background: #0D121C;
    }

    /* 板块 2: 服务矩阵与架构透视 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .intro-checklist {
      list-style: none;
      margin-top: 24px;
    }
    .intro-checklist li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 15px;
      color: var(--text-muted);
    }
    .check-icon {
      width: 20px;
      height: 20px;
      background: rgba(0, 210, 180, 0.15);
      color: #008774;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 12px;
      margin-top: 3px;
      flex-shrink: 0;
    }
    .intro-preview-box {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .intro-preview-box img {
      border-radius: 8px;
      margin-bottom: 18px;
      height: 240px;
      width: 100%;
      object-fit: cover;
    }

    /* 板块 3: 核心优势 6网格 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      transition: all 0.3s ease;
      position: relative;
    }
    .feature-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .feature-icon-wrap {
      width: 48px;
      height: 48px;
      background: rgba(88, 59, 232, 0.08);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--secondary);
      font-weight: 800;
      font-size: 18px;
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 4: 产品方案矩阵 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .product-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.08);
      border-color: rgba(88, 59, 232, 0.3);
    }
    .product-thumb {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-thumb img {
      transform: scale(1.05);
    }
    .product-badge-float {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(10, 13, 20, 0.75);
      backdrop-filter: blur(6px);
      color: var(--primary);
      font-size: 12px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .product-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-body h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .product-body p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .product-specs {
      list-style: none;
      margin-bottom: 24px;
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
      flex: 1;
    }
    .product-specs li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .spec-dot {
      width: 6px;
      height: 6px;
      background: var(--primary);
      border-radius: 50%;
    }

    /* 板块 5: 深色技术底座 */
    .arch-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .arch-node-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .arch-node-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 18px;
      transition: background 0.25s ease;
    }
    .arch-node-item:hover {
      background: rgba(0, 210, 180, 0.06);
      border-color: rgba(0, 210, 180, 0.3);
    }
    .arch-node-item h4 {
      font-size: 16px;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .arch-node-item p {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 板块 6: 4步方案落地流程 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .process-timeline::before {
      content: '';
      position: absolute;
      top: 36px;
      left: 12%;
      right: 12%;
      height: 2px;
      background: #E2E8F0;
      z-index: 1;
    }
    .process-card {
      position: relative;
      z-index: 2;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }
    .process-num {
      width: 44px;
      height: 44px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: var(--bg-white);
      border: 2px solid var(--secondary);
      color: var(--secondary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }
    .process-card h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .process-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 7: 客户故事与实战案例墙 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .case-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-img-box {
      height: 180px;
      overflow: hidden;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-body {
      padding: 22px;
    }
    .case-tag {
      font-size: 12px;
      color: var(--secondary);
      font-weight: 600;
      margin-bottom: 6px;
      display: block;
    }
    .case-body h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .case-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .case-badge-val {
      display: inline-block;
      padding: 4px 10px;
      background: rgba(0, 210, 180, 0.1);
      color: #008774;
      font-size: 12px;
      font-weight: 700;
      border-radius: 4px;
    }

    /* 板块 8: 关键数据统计条 */
    .metrics-section {
      background: linear-gradient(135deg, #101624 0%, #1A2234 100%);
      color: #fff;
      padding: 56px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item {
      padding: 10px;
    }
    .metric-item .val {
      font-size: 42px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
      margin-bottom: 8px;
    }
    .metric-item .lbl {
      font-size: 14px;
      color: #94A3B8;
      font-weight: 500;
    }

    /* 板块 9: 行业用户评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }
    .stars {
      color: #F59E0B;
      font-size: 14px;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .testimonial-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex: 1;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(88, 59, 232, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--secondary);
    }
    .author-info h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-info span {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 板块 10: 动态资讯与技术专栏 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
    }
    .news-thumb {
      height: 190px;
      overflow: hidden;
      position: relative;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }
    .news-tag {
      position: absolute;
      bottom: 12px;
      left: 12px;
      background: rgba(10, 13, 20, 0.75);
      backdrop-filter: blur(4px);
      color: #fff;
      font-size: 11px;
      padding: 3px 8px;
      border-radius: 4px;
    }
    .news-body {
      padding: 22px;
    }
    .news-date {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
      display: block;
    }
    .news-body h4 {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .news-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .news-link {
      font-size: 13px;
      color: var(--secondary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .news-link:hover {
      color: var(--primary);
    }

    /* 板块 11: FAQ 手风琴 */
    .faq-wrap {
      max-width: 880px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-item[open] {
      border-color: var(--primary);
      border-left: 4px solid var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-summary {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      position: relative;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: var(--text-main);
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-icon-arrow {
      font-size: 20px;
      transition: transform 0.25s ease;
      color: var(--text-light);
      font-weight: 400;
      line-height: 1;
    }
    .faq-item[open] .faq-icon-arrow {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .faq-content {
      padding: 0 24px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }

    /* 板块 12: 底部综合保障与行动转化条 */
    .cta-box {
      background: linear-gradient(135deg, #0D131F 0%, #161D2E 100%);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #fff;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
    }
    .cta-box h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .cta-box p {
      font-size: 15px;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .cta-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .cta-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      padding: 6px 12px;
      background: rgba(255, 255, 255, 0.06);
      border-radius: 20px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: #E2E8F0;
    }
    .cta-pill span {
      color: var(--primary);
    }
    .cta-form {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 30px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      color: #CBD5E1;
      margin-bottom: 6px;
      font-weight: 500;
    }
    .form-input {
      width: 100%;
      padding: 10px 14px;
      background: rgba(10, 13, 20, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease;
    }
    .form-input:focus {
      border-color: var(--primary);
    }
    .form-help {
      font-size: 12px;
      color: #64748B;
      margin-top: 10px;
      line-height: 1.5;
    }

    /* 页脚 */
    .site-footer {
      background: #06090E;
      color: #94A3B8;
      padding: 64px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 48px;
    }
    .footer-brand .brand-logo {
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.7;
      color: #64748B;
      font-size: 13px;
      margin-bottom: 18px;
    }
    .footer-col h5 {
      color: #F8FAFC;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
      letter-spacing: -0.01em;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-contact-item {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      margin-bottom: 12px;
      font-size: 13px;
      color: #94A3B8;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
      color: #64748B;
    }
    .trust-badges {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .trust-badge-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #64748B;
    }
    .trust-badge-item:hover {
      color: #94A3B8;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid,
      .intro-grid,
      .arch-container,
      .cta-box {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .product-grid,
      .feature-grid,
      .cases-grid,
      .testimonial-grid,
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline::before {
        display: none;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .utility-bar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        gap: 16px;
        display: none;
      }
      .nav-menu.open {
        display: flex;
      }
      .nav-action .btn {
        display: none;
      }
      .hero-content h1 {
        font-size: 30px;
      }
      .section-wrap {
        padding: 56px 0;
      }
      .section-title {
        font-size: 25px;
      }
      .product-grid,
      .feature-grid,
      .cases-grid,
      .testimonial-grid,
      .news-grid,
      .process-timeline,
      .metrics-grid,
      .arch-node-list,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-box {
        padding: 32px 20px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }