/* roulang page: index */
:root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --accent: #1e40af;
      --warning: #f59e0b;
      --dark-navy: #0f172a;
      --slate-deep: #1e293b;
      --text-main: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --border-color: #e2e8f0;
      --border-focus: #3b82f6;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 20px -4px rgba(0,0,0,0.08);
      --shadow-lg: 0 16px 32px -8px rgba(15,23,42,0.12);
      --transition: all 0.25s 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: 1.6;
      color: var(--text-body);
      background-color: var(--bg-white);
      -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;
      font-size: 1rem;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部双行导航 */
    .site-header {
      width: 100%;
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--bg-white);
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    .utility-bar {
      background-color: #f1f5f9;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.85rem;
      color: var(--text-muted);
      padding: 6px 0;
    }

    .utility-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .utility-left span {
      margin-right: 24px;
    }

    .utility-right a {
      color: var(--text-muted);
    }
    .utility-right a:hover {
      color: var(--primary);
    }

    .main-nav {
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      height: 72px;
      display: flex;
      align-items: center;
    }

    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--dark-navy);
      letter-spacing: -0.5px;
    }

    .logo-badge {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-weight: 800;
      font-size: 1.1rem;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-body);
      font-size: 0.95rem;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #fff;
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }

    .btn-outline {
      border-color: var(--border-color);
      background-color: #fff;
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .btn-light {
      background: #ffffff;
      color: var(--primary);
      border-color: #ffffff;
    }
    .btn-light:hover {
      background: #f1f5f9;
    }

    /* 板块排版公用规范 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: var(--bg-light);
    }

    .section-dark {
      background-color: var(--dark-navy);
      color: #f8fafc;
    }

    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 50px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(37, 99, 235, 0.1);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 999px;
      margin-bottom: 12px;
    }

    .section-dark .section-badge {
      background: rgba(255, 255, 255, 0.12);
      color: #93c5fd;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-dark .section-title {
      color: #ffffff;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .section-dark .section-desc {
      color: #94a3b8;
    }

    /* 板块 1: Hero 预约与服务选择 */
    .hero-banner {
      position: relative;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 58, 138, 0.85)),
                  url('/assets/images/d0d63ba931c45031.webp') center/cover no-repeat;
      color: #fff;
      padding: 90px 0 100px 0;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #fff;
    }

    .hero-desc {
      font-size: 1.1rem;
      line-height: 1.75;
      color: #cbd5e1;
      margin-bottom: 30px;
    }

    .hero-trust-badges {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      margin-top: 25px;
      border-top: 1px solid rgba(255,255,255,0.15);
      padding-top: 20px;
    }

    .trust-tag {
      font-size: 0.85rem;
      color: #94a3b8;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .trust-tag::before {
      content: "✓";
      color: #38bdf8;
      font-weight: bold;
    }

    .hero-booking-card {
      background: #ffffff;
      color: var(--text-main);
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .booking-card-head {
      margin-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 14px;
    }

    .booking-card-head h2 {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--dark-navy);
    }

    .booking-card-head p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .booking-form-grid {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-body);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition);
      background-color: #fff;
    }

    .form-control:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
    }

    /* 板块 2: 分类入口墙 (功能架构) */
    .portal-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .portal-card {
      background: #fff;
      padding: 28px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }

    .portal-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #93c5fd;
    }

    .portal-icon {
      width: 48px;
      height: 48px;
      background: #eff6ff;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 18px;
      font-size: 1.25rem;
    }

    .portal-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .portal-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .portal-foot {
      margin-top: 18px;
      font-weight: 600;
      font-size: 0.85rem;
      color: var(--primary);
    }

    /* 板块 3: 数字化转型三大痛点 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .pain-card {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid #fee2e2;
      padding: 30px;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
    }

    .pain-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: #ef4444;
    }

    .pain-badge {
      display: inline-block;
      padding: 3px 8px;
      border-radius: 4px;
      background: #fef2f2;
      color: #dc2626;
      font-size: 0.8rem;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .pain-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #991b1b;
    }

    .pain-card p {
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 板块 4: 平台核心技术体系 (交错图文+认证参数) */
    .tech-overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .tech-image-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      position: relative;
    }

    .tech-specs {
      margin-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .spec-box {
      background: #f1f5f9;
      padding: 16px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--primary);
    }

    .spec-box strong {
      display: block;
      color: var(--text-main);
      font-size: 0.95rem;
      margin-bottom: 4px;
    }

    .spec-box span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 板块 5: 核心优势 3x2 网格 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .adv-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #bfdbfe;
    }

    .adv-icon {
      font-size: 1.75rem;
      margin-bottom: 16px;
      color: var(--primary);
    }

    .adv-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .adv-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 6: 精选标准化产品推荐 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .product-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      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;
      overflow: hidden;
      position: relative;
    }

    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .product-card:hover .product-thumb img {
      transform: scale(1.05);
    }

    .product-tag {
      position: absolute;
      top: 14px;
      right: 14px;
      background: rgba(15, 23, 42, 0.85);
      color: #fff;
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
    }

    .product-body {
      padding: 26px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .product-body h3 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .product-feature-list {
      list-style: none;
      margin: 16px 0 24px 0;
      flex-grow: 1;
    }

    .product-feature-list li {
      font-size: 0.9rem;
      color: var(--text-body);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .product-feature-list li::before {
      content: "•";
      color: var(--primary);
      font-size: 1.3rem;
      line-height: 1;
    }

    /* 板块 7: 深色科技案例理念 */
    .dark-showcase-grid {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .dark-showcase-img {
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255, 255, 255, 0.15);
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }

    .concept-points {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .concept-item h4 {
      font-size: 1.15rem;
      color: #38bdf8;
      margin-bottom: 6px;
    }

    .concept-item p {
      font-size: 0.92rem;
      color: #94a3b8;
    }

    /* 板块 8: 标杆项目成效实证与业务故事 */
    .story-card-wrap {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1.3fr;
    }

    .story-media {
      position: relative;
      height: 100%;
      min-height: 380px;
    }

    .story-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .story-info {
      padding: 42px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .story-tag {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 10px;
    }

    .story-info h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .story-quote {
      font-size: 1rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 24px;
      position: relative;
    }

    .story-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 18px;
    }

    .author-meta strong {
      display: block;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .author-meta span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 板块 9: 关键量化效能数据指标条 */
    .metrics-bar {
      background: linear-gradient(135deg, #1e3a8a, #0f172a);
      color: #fff;
      padding: 60px 0;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }

    .metric-item .metric-num {
      font-size: 3rem;
      font-weight: 800;
      color: #38bdf8;
      line-height: 1;
      margin-bottom: 12px;
    }

    .metric-item .metric-label {
      font-size: 1.05rem;
      font-weight: 600;
      color: #e2e8f0;
      margin-bottom: 6px;
    }

    .metric-item .metric-sub {
      font-size: 0.85rem;
      color: #94a3b8;
    }

    /* 板块 10: 行业资讯与科技洞察 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .news-img {
      height: 190px;
      overflow: hidden;
    }

    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .news-card:hover .news-img img {
      transform: scale(1.05);
    }

    .news-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    .news-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.4;
      color: var(--text-main);
    }

    .news-body p {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
      flex-grow: 1;
    }

    .news-link {
      margin-top: 16px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary);
    }

    /* 板块 11: 合作伙伴与生态保障 */
    .partner-logos-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 20px;
    }

    .partner-logo-box {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      height: 80px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 15px;
      font-weight: 700;
      color: #64748b;
      font-size: 0.9rem;
      text-align: center;
      transition: var(--transition);
    }

    .partner-logo-box:hover {
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    /* 板块 12: 接入常见问题 FAQ */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-item details {
      width: 100%;
    }

    .faq-item summary {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-main);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--primary);
      transition: transform 0.2s;
    }

    .faq-item details[open] summary::after {
      content: "−";
    }

    .faq-content {
      padding: 0 24px 22px 24px;
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.7;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    /* 预约演示统一收口区 (Footer 上方) */
    .cta-final-box {
      background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
      border: 1px solid #bfdbfe;
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .cta-final-box h2 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 14px;
      color: var(--dark-navy);
    }

    .cta-final-box p {
      font-size: 1.05rem;
      color: var(--text-body);
      margin-bottom: 30px;
      max-width: 680px;
      margin-left: auto;
      margin-right: auto;
    }

    .cta-inline-form {
      display: flex;
      gap: 12px;
      max-width: 620px;
      margin: 0 auto;
    }

    .cta-inline-form input {
      flex: 1;
      padding: 12px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid #cbd5e1;
      outline: none;
    }

    .cta-inline-form input:focus {
      border-color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background-color: var(--slate-deep);
      color: #94a3b8;
      padding: 70px 0 30px 0;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1.3fr 1.1fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .footer-col p {
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: #fff;
    }

    .footer-contact-item {
      margin-bottom: 10px;
      line-height: 1.5;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 25px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid,
      .tech-overview-grid,
      .dark-showcase-grid,
      .story-card-wrap {
        grid-template-columns: 1fr;
      }
      .portal-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .products-grid,
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .partner-logos-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .utility-bar {
        display: none;
      }
      .nav-links {
        display: none;
      }
      .hero-banner {
        padding: 50px 0 60px 0;
      }
      .hero-content h1 {
        font-size: 2rem;
      }
      .pain-grid,
      .portal-grid,
      .advantage-grid,
      .products-grid,
      .news-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .partner-logos-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-inline-form {
        flex-direction: column;
      }
      .section-wrap {
        padding: 50px 0;
      }
      .section-title {
        font-size: 1.65rem;
      }
    }