/* roulang page: index */
:root {
      --primary: #0F3E6D;
      --primary-hover: #0a2d50;
      --accent: #00A884;
      --accent-hover: #008f70;
      --dark-surface: #0B1B2B;
      --bg-light: #F4F7FA;
      --bg-white: #FFFFFF;
      --text-main: #1A2734;
      --text-muted: #4A5568;
      --text-sub: #718096;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.06);
      --shadow-md: 0 6px 16px -2px rgba(15,62,109,0.08);
      --shadow-lg: 0 12px 24px -4px rgba(15,62,109,0.12);
      --container-max: 1240px;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.68;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .top-utility-bar {
      background-color: #0A2540;
      color: #CBD5E1;
      font-size: 13px;
      height: 38px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .utility-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 6px var(--accent);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: #ffffff;
      box-shadow: 0 2px 8px rgba(0,0,0,0.06);
      transition: all 0.3s;
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-badge {
      font-size: 11px;
      background-color: #E6F6F2;
      color: var(--accent);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: #334155;
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background-color: var(--primary);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 12px rgba(0, 168, 132, 0.3);
    }
    .btn-secondary {
      background-color: #FFFFFF;
      color: var(--primary);
      border-color: #CBD5E1;
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      background-color: #F8FAFC;
    }
    .btn-dark {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background-color: var(--primary-hover);
    }

    /* 板块结构 */
    .section {
      padding: 80px 0;
      position: relative;
    }
    .section-light {
      background-color: var(--bg-light);
    }
    .section-white {
      background-color: var(--bg-white);
    }
    .section-dark {
      background-color: var(--dark-surface);
      color: #FFFFFF;
    }
    .section-header {
      margin-bottom: 50px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--accent);
      background-color: #E6F6F2;
      padding: 4px 12px;
      border-radius: 999px;
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .section-tag.tag-dark {
      background-color: rgba(0, 168, 132, 0.2);
      color: #4ade80;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: inherit;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 板块 1: 首屏 Hero */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, rgba(15, 62, 109, 0.94) 0%, rgba(11, 27, 43, 0.96) 100%), url('/assets/images/07bd2e1a47cd6b49.webp') center/cover no-repeat;
      color: #FFFFFF;
      padding: 100px 0 80px 0;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-text {
      font-size: 17px;
      color: #E2E8F0;
      line-height: 1.8;
      margin-bottom: 36px;
    }
    .hero-btn-group {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-badges-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.15);
    }
    .badge-item h4 {
      font-size: 20px;
      font-weight: 700;
      color: #38BDF8;
      margin-bottom: 4px;
    }
    .badge-item p {
      font-size: 13px;
      color: #94A3B8;
    }
    .hero-mockup-card {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 18px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    }
    .mockup-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding-bottom: 12px;
      margin-bottom: 16px;
    }
    .mockup-dots {
      display: flex;
      gap: 6px;
    }
    .mockup-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background-color: rgba(255,255,255,0.3);
    }
    .mockup-title {
      font-size: 12px;
      color: #CBD5E1;
      letter-spacing: 0.5px;
    }
    .hero-preview-img {
      border-radius: var(--radius-md);
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }

    /* 板块 2: 平台架构概览 */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .overview-img-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }
    .overview-spec-box {
      margin-top: 24px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .spec-icon {
      font-size: 28px;
      color: var(--accent);
      flex-shrink: 0;
    }
    .checklist-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 28px;
    }
    .checklist-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }
    .check-icon {
      color: var(--accent);
      font-weight: 700;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 板块 3: 核心优势六卡 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .adv-icon-tag {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      background-color: #E6F6F2;
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .adv-card h3 {
      font-size: 19px;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .adv-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 4: 矩阵方案卡 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .matrix-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .matrix-card.featured {
      border: 2px solid var(--primary);
      position: relative;
    }
    .popular-tag {
      position: absolute;
      top: -12px;
      right: 24px;
      background-color: var(--primary);
      color: #FFFFFF;
      font-size: 12px;
      padding: 2px 12px;
      border-radius: 12px;
      font-weight: 600;
    }
    .matrix-tier {
      font-size: 13px;
      color: var(--accent);
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .matrix-card h3 {
      font-size: 22px;
      margin-bottom: 14px;
      color: var(--text-main);
    }
    .matrix-card p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.6;
    }
    .matrix-features {
      list-style: none;
      margin-bottom: 30px;
      flex-grow: 1;
    }
    .matrix-features li {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 板块 5: 治理理念深色区 */
    .philosophy-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .flow-steps {
      margin-top: 32px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .flow-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      background: rgba(255,255,255,0.04);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border-left: 3px solid var(--accent);
    }
    .flow-num {
      font-size: 16px;
      font-weight: 700;
      color: #38BDF8;
      background: rgba(56, 189, 248, 0.15);
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .flow-text h4 {
      font-size: 16px;
      color: #FFFFFF;
      margin-bottom: 4px;
    }
    .flow-text p {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 板块 6: 场景方案 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .scenario-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .scenario-img-wrap {
      height: 180px;
      overflow: hidden;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .scenario-card:hover .scenario-img-wrap img {
      transform: scale(1.05);
    }
    .scenario-body {
      padding: 24px;
    }
    .scenario-body h3 {
      font-size: 18px;
      margin-bottom: 10px;
      color: var(--primary);
    }
    .scenario-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .scenario-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .pill-tag {
      font-size: 12px;
      background-color: var(--bg-light);
      color: #334155;
      padding: 3px 10px;
      border-radius: 4px;
    }

    /* 板块 7: 关键成果统计条 */
    .stats-bar-section {
      background: linear-gradient(90deg, #0A2540 0%, #0F3E6D 100%);
      color: #FFFFFF;
      padding: 60px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-number {
      font-size: 42px;
      font-weight: 800;
      color: #38BDF8;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 15px;
      font-weight: 600;
      color: #F8FAFC;
      margin-bottom: 4px;
    }
    .stat-sub {
      font-size: 12px;
      color: #94A3B8;
    }

    /* 板块 8: 用户口碑评价墙 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .testimonial-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .quote-icon {
      font-size: 32px;
      line-height: 1;
      color: #CBD5E1;
      margin-bottom: 16px;
      font-family: serif;
    }
    .quote-content {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 18px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background-color: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-role {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 板块 9: 资讯列表动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.2s ease;
    }
    .news-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
    }
    .news-date {
      font-size: 13px;
      color: var(--text-sub);
      margin-bottom: 10px;
    }
    .news-card h3 {
      font-size: 17px;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .news-badge {
      display: inline-block;
      font-size: 11px;
      background-color: #EFF6FF;
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
      font-weight: 600;
    }

    /* 板块 10: FAQ 手风琴 */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-toggle-icon {
      font-size: 18px;
      color: var(--text-sub);
      transition: transform 0.2s;
    }
    .faq-answer {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.closed .faq-answer {
      display: none;
    }
    .faq-item.closed .faq-toggle-icon {
      transform: rotate(0deg);
    }
    .faq-item:not(.closed) {
      border-color: #CBD5E1;
      box-shadow: var(--shadow-sm);
    }
    .faq-item:not(.closed) .faq-toggle-icon {
      transform: rotate(45deg);
      color: var(--accent);
    }

    /* 板块 11: 交付与服务承诺 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-card {
      background-color: var(--bg-light);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      border: 1px solid rgba(0,0,0,0.04);
      text-align: center;
    }
    .guarantee-card h4 {
      font-size: 17px;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .guarantee-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 12: 底部行动转化区 */
    .contact-wrapper {
      background: linear-gradient(135deg, #0B1B2B 0%, #0F3E6D 100%);
      border-radius: var(--radius-lg);
      padding: 50px 60px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .contact-info h2 {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 20px;
    }
    .contact-info p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .contact-form-box {
      background-color: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px;
      color: var(--text-main);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background-color: #F8FAFC;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--accent);
      background-color: #FFFFFF;
    }
    .privacy-notice {
      font-size: 12px;
      color: var(--text-sub);
      margin-top: 12px;
      text-align: center;
    }

    /* 页脚 */
    .site-footer {
      background-color: #081420;
      color: #94A3B8;
      padding: 70px 0 30px 0;
      border-top: 1px solid rgba(255,255,255,0.08);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #F8FAFC;
      font-size: 16px;
      margin-bottom: 20px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #38BDF8;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid, .overview-grid, .philosophy-wrap, .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .advantages-grid, .matrix-grid, .scenarios-grid, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
    }

    @media (max-width: 768px) {
      .top-utility-bar {
        display: none;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .advantages-grid, .matrix-grid, .scenarios-grid, .testimonial-grid, .news-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section {
        padding: 50px 0;
      }
      .section-title {
        font-size: 26px;
      }
      .contact-wrapper {
        padding: 30px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .hero-badges-row {
        grid-template-columns: 1fr;
      }
      .hero-btn-group {
        flex-direction: column;
      }
      .checklist-grid {
        grid-template-columns: 1fr;
      }
    }