/* roulang page: index */
:root {
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
      --accent-green: #10b981;
      --accent-amber: #f59e0b;
      --accent-cyan: #06b6d4;
      --bg-main: #f8fafc;
      --bg-white: #ffffff;
      --bg-card: #ffffff;
      --bg-dark: #0f172a;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #94a3b8;
      --text-white: #f8fafc;
      --border-color: #e2e8f0;
      --border-dark: #334155;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
      --shadow-hover: 0 20px 35px -10px rgba(79, 70, 229, 0.15);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font-family: inherit;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 顶栏与主导航 */
    .topbar {
      background-color: #0b1120;
      color: var(--text-light);
      font-size: 13px;
      border-bottom: 1px solid #1e293b;
      padding: 6px 0;
    }
    .topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-green);
    }
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 20px;
      color: #0f172a;
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 38px;
      height: 38px;
      background: var(--primary-gradient);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 28px;
    }
    .nav-links a {
      color: var(--text-main);
      font-size: 15px;
      font-weight: 600;
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
    }
    .nav-links a:hover::after, .nav-links a.active::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .search-mock {
      display: flex;
      align-items: center;
      background-color: #f1f5f9;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      padding: 6px 14px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      border-radius: var(--radius-full);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      padding: 10px 22px;
      font-size: 14px;
      text-align: center;
    }
    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    }
    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
      transform: translateY(-1px);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background-color: #ffffff;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: #faf5ff;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-size: 12px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .badge-primary {
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
    }
    .badge-success {
      background: rgba(16, 185, 129, 0.1);
      color: var(--accent-green);
    }
    .badge-amber {
      background: rgba(245, 158, 11, 0.1);
      color: var(--accent-amber);
    }
    /* Section通用排版 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
      letter-spacing: -0.5px;
      margin-top: 12px;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    /* 板块1：Hero 首屏自测与指标看板 */
    .hero-section {
      background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
      padding: 60px 0 90px;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      color: #0f172a;
      margin: 16px 0 20px;
    }
    .hero-desc {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.8;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 36px;
      padding-top: 24px;
      border-top: 1px solid #cbd5e1;
    }
    .metric-item h4 {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      font-family: monospace;
    }
    .metric-item p {
      font-size: 13px;
      color: var(--text-muted);
    }
    .quiz-card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .quiz-header {
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 16px;
      margin-bottom: 20px;
    }
    .quiz-form .form-group {
      margin-bottom: 18px;
    }
    .quiz-form label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: #334155;
      margin-bottom: 8px;
    }
    .quiz-form select, .quiz-form input {
      width: 100%;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      background-color: #f8fafc;
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
    }
    .quiz-form select:focus, .quiz-form input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }
    .quiz-preview-bar {
      background: #f1f5f9;
      border-radius: var(--radius-sm);
      padding: 12px;
      margin-top: 20px;
      font-size: 12px;
      color: #475569;
    }
    /* 板块2：资料目录与总览 */
    .catalog-section {
      background-color: var(--bg-white);
    }
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .catalog-card {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .catalog-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }
    .catalog-card-icon {
      width: 44px;
      height: 44px;
      background: #ffffff;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
      box-shadow: var(--shadow-sm);
      color: var(--primary);
    }
    .catalog-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .catalog-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    /* 板块3：核心优势矩阵区 */
    .features-section {
      background-color: #f8fafc;
    }
    .features-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: 30px;
      transition: var(--transition);
    }
    .feature-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
      transform: translateY(-4px);
    }
    .feature-card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 16px;
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #0f172a;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    /* 板块4：热门产品与解决方案区 */
    .solutions-section {
      background-color: var(--bg-white);
    }
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .solution-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: var(--bg-white);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .solution-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-5px);
    }
    .solution-img-wrapper {
      position: relative;
      height: 200px;
      overflow: hidden;
    }
    .solution-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .solution-card:hover .solution-img-wrapper img {
      transform: scale(1.05);
    }
    .solution-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .solution-tags {
      display: flex;
      gap: 6px;
      margin-bottom: 12px;
      flex-wrap: wrap;
    }
    .solution-content h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .solution-content p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    /* 板块5：深色实战对比区 */
    .compare-section {
      background-color: var(--bg-dark);
      color: var(--text-white);
    }
    .compare-section .section-title {
      color: #ffffff;
    }
    .compare-section .section-desc {
      color: var(--text-light);
    }
    .compare-table-wrapper {
      border-radius: var(--radius-md);
      border: 1px solid var(--border-dark);
      overflow: hidden;
      background: #1e293b;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 20px 24px;
      border-bottom: 1px solid var(--border-dark);
    }
    .compare-table th {
      background: #0b1120;
      font-size: 15px;
      font-weight: 700;
      color: #f1f5f9;
    }
    .compare-table td {
      font-size: 14px;
      color: #cbd5e1;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-cell {
      background: rgba(79, 70, 229, 0.1);
      color: #38bdf8 !important;
      font-weight: 600;
    }
    /* 板块6：流水线流程推进与里程碑 */
    .pipeline-section {
      background-color: var(--bg-white);
    }
    .pipeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-card {
      background: var(--bg-main);
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .step-number {
      font-size: 32px;
      font-weight: 900;
      color: #cbd5e1;
      font-family: monospace;
      margin-bottom: 12px;
    }
    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0f172a;
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* 板块7：用户故事与实战案例区 */
    .cases-section {
      background-color: #f8fafc;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .case-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .case-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
    }
    .case-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 14px;
      color: #0f172a;
    }
    .case-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .case-meta {
      background: #f8fafc;
      border-radius: var(--radius-sm);
      padding: 14px 18px;
      font-size: 13px;
      color: #475569;
      border-left: 4px solid var(--primary);
    }
    /* 板块8：关键数据统计条 */
    .stats-bar-section {
      background: var(--primary-gradient);
      color: #ffffff;
      padding: 56px 0;
    }
    .stats-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stats-num {
      font-size: 42px;
      font-weight: 900;
      font-family: monospace;
      line-height: 1;
      margin-bottom: 10px;
    }
    .stats-label {
      font-size: 14px;
      opacity: 0.9;
    }
    /* 板块9：客户评价与专家推荐区 */
    .testimonials-section {
      background-color: var(--bg-white);
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .author-info h4 {
      font-size: 14px;
      font-weight: 700;
    }
    .author-info p {
      font-size: 12px;
      color: var(--text-muted);
    }
    /* 板块10：内嵌资讯与技术周报区 */
    .news-section {
      background-color: #f8fafc;
    }
    .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);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }
    .news-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    /* 板块11：平台保障与合规认证区 */
    .trust-section {
      background-color: var(--bg-white);
    }
    .trust-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .trust-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      background: #fafafa;
    }
    .trust-icon {
      font-size: 32px;
      margin-bottom: 14px;
      color: var(--primary);
    }
    .trust-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .trust-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    /* 板块12：常见问题解答 (FAQ) */
    .faq-section {
      background-color: #f8fafc;
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-toggle-icon {
      font-size: 18px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    /* 板块13：终极转化与试用申请表单区 */
    .convert-section {
      background: linear-gradient(135deg, #1e1b4b 0%, #0f172a 100%);
      color: #ffffff;
      padding: 80px 0;
    }
    .convert-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .convert-info h2 {
      font-size: 36px;
      font-weight: 800;
      margin-bottom: 20px;
      line-height: 1.3;
    }
    .convert-info p {
      font-size: 15px;
      color: #94a3b8;
      line-height: 1.8;
      margin-bottom: 28px;
    }
    .convert-perks {
      list-style: none;
    }
    .convert-perks li {
      font-size: 14px;
      color: #cbd5e1;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .convert-form-card {
      background: var(--bg-white);
      color: var(--text-main);
      padding: 36px;
      border-radius: var(--radius-lg);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
    }
    .convert-form-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .convert-form-card p {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 16px;
    }
    .form-field {
      margin-bottom: 16px;
    }
    .form-field label {
      display: block;
      font-size: 12px;
      font-weight: 700;
      color: #475569;
      margin-bottom: 6px;
    }
    .form-field input, .form-field select {
      width: 100%;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 14px;
      outline: none;
      transition: var(--transition);
    }
    .form-field input:focus, .form-field select:focus {
      border-color: var(--primary);
    }
    /* 页脚 */
    .site-footer {
      background-color: #0b1120;
      color: var(--text-light);
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 18px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      color: var(--text-light);
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-light);
      font-size: 13px;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-contact p {
      font-size: 13px;
      margin-bottom: 8px;
      color: var(--text-light);
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }
    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .catalog-grid { grid-template-columns: repeat(2, 1fr); }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .solution-grid { grid-template-columns: repeat(2, 1fr); }
      .pipeline-steps { grid-template-columns: repeat(2, 1fr); }
      .trust-grid { grid-template-columns: repeat(2, 1fr); }
      .convert-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .search-mock { display: none; }
      .hero-content h1 { font-size: 32px; }
      .features-grid { grid-template-columns: 1fr; }
      .solution-grid { grid-template-columns: 1fr; }
      .cases-grid { grid-template-columns: 1fr; }
      .stats-bar-grid { grid-template-columns: repeat(2, 1fr); }
      .testimonials-grid { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .pipeline-steps { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .form-row { grid-template-columns: 1fr; }
      section { padding: 50px 0; }
    }