/* roulang page: index */
:root {
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-alt: #F1F5F9;
      --bg-dark: #0B132B;
      --primary: #0A58CA;
      --primary-hover: #084298;
      --accent-teal: #0D9488;
      --accent-blue: #2563EB;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-card: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-hover: 0 12px 20px -3px rgba(10, 88, 202, 0.1);
      --container-max: 1200px;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .section-padding {
      padding: 72px 0;
    }
    .section-header {
      margin-bottom: 44px;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.02em;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 820px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 15px;
      padding: 11px 24px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      gap: 8px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(10, 88, 202, 0.25);
    }
    .btn-outline {
      background-color: transparent;
      color: var(--primary);
      border-color: var(--border-color);
      background-color: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary-hover);
    }
    .badge {
      display: inline-flex;
      align-items: center;
      padding: 4px 10px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 4px;
      background-color: rgba(10, 88, 202, 0.08);
      color: var(--primary);
    }

    /* Top Bar */
    .top-bar {
      background-color: var(--bg-alt);
      border-bottom: 1px solid var(--border-color);
      font-size: 13px;
      color: var(--text-muted);
      height: 38px;
      display: flex;
      align-items: center;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .top-bar-notice {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-teal);
      border-radius: 50%;
      display: inline-block;
    }

    /* Header Nav */
    .site-header {
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
    }
    .logo-symbol {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--accent-blue));
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-weight: 800;
      font-size: 17px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      color: var(--text-body);
      font-weight: 500;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--primary);
    }

    /* 板块 1: Hero */
    .hero-section {
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      background-image: linear-gradient(rgba(255,255,255,0.92), rgba(255,255,255,0.95)), url('/assets/images/5d5a9f7334a4b681.png');
      background-size: cover;
      background-position: center;
      padding: 72px 0 60px;
    }
    .hero-creator-header {
      display: flex;
      align-items: center;
      gap: 18px;
      margin-bottom: 24px;
    }
    .creator-avatar {
      width: 72px;
      height: 72px;
      border-radius: 12px;
      border: 2px solid var(--border-color);
      background-color: #FFFFFF;
      padding: 4px;
    }
    .hero-h1 {
      font-size: 38px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      letter-spacing: -0.02em;
    }
    .hero-intro {
      font-size: 16px;
      color: var(--text-body);
      line-height: 1.75;
      max-width: 900px;
      margin: 18px 0 28px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      align-items: center;
      margin-bottom: 40px;
    }
    .hero-metrics-pill {
      display: flex;
      gap: 32px;
      background-color: var(--bg-alt);
      padding: 16px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      max-width: 680px;
    }
    .pill-item {
      display: flex;
      flex-direction: column;
    }
    .pill-val {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
    }
    .pill-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 板块 2: 安全主张 */
    .sec-claim {
      background-color: var(--bg-main);
    }
    .claim-grid {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .claim-content h3 {
      font-size: 22px;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .claim-content p {
      font-size: 15px;
      color: var(--text-body);
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .claim-box {
      background: #FFFFFF;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
    }
    .claim-box h4 {
      font-size: 15px;
      color: var(--accent-teal);
      margin-bottom: 8px;
    }

    /* 板块 3: 检查项清单 */
    .sec-checks {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .check-list-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .check-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      background-color: var(--bg-main);
      transition: all 0.3s ease;
    }
    .check-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      background-color: #FFFFFF;
      border-color: var(--primary);
    }
    .check-card-title {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .check-card-p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 板块 4: 合规与认证徽章 */
    .sec-compliance {
      background-color: var(--bg-alt);
    }
    .compliance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .compliance-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
    }
    .compliance-tag {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .compliance-title {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .compliance-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 板块 5: 边界说明与技术拓扑 (深色对比区) */
    .sec-boundary {
      background-color: var(--bg-dark);
      color: #F8FAFC;
    }
    .sec-boundary .section-title {
      color: #FFFFFF;
    }
    .sec-boundary .section-desc {
      color: #94A3B8;
    }
    .boundary-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 36px;
    }
    .flow-step {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: var(--radius-md);
      padding: 22px;
      position: relative;
    }
    .flow-num {
      font-size: 12px;
      font-weight: 700;
      background: var(--primary);
      color: #FFFFFF;
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .flow-step h4 {
      font-size: 16px;
      margin-bottom: 10px;
      color: #FFFFFF;
    }
    .flow-step p {
      font-size: 13px;
      color: #CBD5E1;
      line-height: 1.6;
    }

    /* 板块 6: 解决方案选型对比表 */
    .sec-comparison {
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      text-align: left;
      font-size: 14px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background-color: var(--bg-alt);
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table tr:hover td {
      background-color: rgba(248, 250, 252, 0.7);
    }
    .compare-highlight {
      background-color: rgba(10, 88, 202, 0.04);
      font-weight: 600;
      color: var(--primary);
    }

    /* 板块 7: 标杆应用场景 */
    .sec-scenarios {
      background-color: var(--bg-main);
    }
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .scenario-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
    }
    .scenario-img {
      height: 220px;
      object-fit: cover;
      width: 100%;
    }
    .scenario-body {
      padding: 24px;
      flex: 1;
    }
    .scenario-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .scenario-text {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 板块 8: 运行指标统计条 */
    .sec-metrics {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 48px 0;
    }
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-data-val {
      font-size: 36px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }
    .metric-data-lbl {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-top: 6px;
    }
    .metric-sub {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 板块 9: 资讯与前沿指南 */
    .sec-news {
      background-color: var(--bg-main);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }
    .news-meta {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
    }
    .news-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-brief {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.6;
      flex: 1;
    }

    /* 板块 10: 信任背书与行业实践反馈 */
    .sec-testimonials {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .feedback-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feedback-item {
      background-color: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feedback-quote {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .feedback-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .author-role {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
    }
    .author-org {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块 11: 常见问题手风琴 */
    .sec-faq {
      background-color: var(--bg-main);
    }
    .faq-wrapper {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-item summary {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      list-style: none;
      position: relative;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: "+";
      position: absolute;
      right: 24px;
      font-size: 18px;
      color: var(--text-muted);
    }
    .faq-item[open] summary::after {
      content: "-";
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 板块 12: 行动转化呼吁 */
    .sec-cta {
      background: linear-gradient(135deg, #0A58CA 0%, #1E40AF 100%);
      color: #FFFFFF;
      text-align: center;
    }
    .cta-card {
      max-width: 800px;
      margin: 0 auto;
      padding: 20px;
    }
    .cta-card h2 {
      font-size: 30px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .cta-card p {
      font-size: 15px;
      color: #E2E8F0;
      margin-bottom: 30px;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 520px;
      margin: 0 auto;
    }
    .cta-input {
      flex: 1;
      padding: 12px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255,255,255,0.25);
      background-color: #FFFFFF;
      font-size: 14px;
      outline: none;
    }
    .btn-cta-submit {
      background-color: #0D9488;
      color: #FFFFFF;
      border: none;
      padding: 12px 24px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: background 0.2s;
    }
    .btn-cta-submit:hover {
      background-color: #0f766e;
    }

    /* Footer */
    .site-footer {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 24px;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 48px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-body);
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-contact p {
      margin-bottom: 8px;
      color: var(--text-body);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      color: var(--text-muted);
      font-size: 13px;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .check-list-grid { grid-template-columns: repeat(2, 1fr); }
      .compliance-grid { grid-template-columns: repeat(2, 1fr); }
      .boundary-flow { grid-template-columns: repeat(2, 1fr); }
      .news-grid { grid-template-columns: repeat(2, 1fr); }
      .feedback-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hero-h1 { font-size: 28px; }
      .claim-grid { grid-template-columns: 1fr; }
      .check-list-grid { grid-template-columns: 1fr; }
      .scenarios-grid { grid-template-columns: 1fr; }
      .metrics-bar-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
      .news-grid { grid-template-columns: 1fr; }
      .feedback-grid { grid-template-columns: 1fr; }
      .cta-form { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
    }