/* roulang page: index */
:root {
      --primary: #0F4C5C;
      --primary-hover: #0a3540;
      --accent: #FB8500;
      --accent-hover: #e07400;
      --dark: #131B23;
      --text-main: #1A202C;
      --text-muted: #4A5568;
      --text-light: #718096;
      --bg-main: #F8F9FA;
      --bg-alt: #FFFFFF;
      --bg-dark: #101820;
      --border: #E2E8F0;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 12px rgba(15, 76, 92, 0.08);
      --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
      --radius: 8px;
      --radius-sm: 6px;
      --transition: all 0.25s ease-in-out;
    }

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

    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-main);
      background-color: var(--bg-main);
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行专属导航 */
    .top-bar {
      background-color: #EBF2F4;
      font-size: 13px;
      color: var(--text-muted);
      border-bottom: 1px solid rgba(15, 76, 92, 0.1);
      padding: 7px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-info span {
      margin-right: 20px;
    }
    .top-links a {
      color: var(--primary);
      font-weight: 600;
    }

    .main-nav {
      position: sticky;
      top: 0;
      z-index: 999;
      background: #FFFFFF;
      box-shadow: var(--shadow-sm);
      border-bottom: 1px solid var(--border);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-brand-badge {
      font-size: 11px;
      background: var(--primary);
      color: #fff;
      padding: 2px 7px;
      border-radius: var(--radius-sm);
      font-weight: 500;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 28px;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      padding: 9px 20px;
      background-color: var(--accent);
      color: #fff !important;
      font-weight: 600;
      font-size: 14px;
      border-radius: var(--radius-sm);
    }
    .nav-cta:hover {
      background-color: var(--accent-hover);
    }

    /* 通用板块与排版 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-light {
      background-color: var(--bg-alt);
    }
    .section-gray {
      background-color: var(--bg-main);
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 52px;
    }
    .section-badge {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: rgba(15, 76, 92, 0.08);
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-dark .section-badge {
      background: rgba(251, 133, 0, 0.2);
      color: var(--accent);
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 14px;
      color: var(--text-main);
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #A0AEC0;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 26px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
    }
    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background: transparent;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: #FFFFFF;
    }

    /* 板块 01: Hero 白皮书资料获客模式 */
    .hero-section {
      background: linear-gradient(135deg, rgba(15, 76, 92, 0.95), rgba(19, 27, 35, 0.96)), url('/assets/images/fa4d45952c876366.jpg') center/cover no-repeat;
      color: #FFFFFF;
      padding: 90px 0 100px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 50px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #FFFFFF;
    }
    .hero-content h1 span {
      color: var(--accent);
    }
    .hero-lead {
      font-size: 16px;
      line-height: 1.8;
      color: #E2E8F0;
      margin-bottom: 30px;
    }
    .hero-meta-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-bottom: 32px;
    }
    .hero-meta-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: #CBD5E0;
    }
    .hero-meta-item strong {
      color: #FFFFFF;
      font-weight: 600;
    }
    .hero-book-card {
      background: #FFFFFF;
      color: var(--text-main);
      padding: 36px 32px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      border-top: 4px solid var(--accent);
    }
    .book-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
    }
    .book-summary {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .download-form input, .download-form select {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      margin-bottom: 12px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: #F8F9FA;
      outline: none;
    }
    .download-form input:focus, .download-form select:focus {
      border-color: var(--primary);
      background: #FFFFFF;
    }
    .form-btn {
      width: 100%;
      height: 46px;
      font-size: 15px;
      font-weight: 600;
    }
    .form-tips {
      font-size: 12px;
      color: var(--text-light);
      margin-top: 10px;
      text-align: center;
    }

    /* 板块 02: 深度可信体系 */
    .specs-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .specs-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .spec-box {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px 20px;
      border-left: 4px solid var(--primary);
    }
    .spec-value {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .spec-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .spec-sub {
      font-size: 13px;
      color: var(--text-light);
      line-height: 1.5;
    }

    /* 板块 03: 6卡片核心优势 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 30px 26px;
      transition: var(--transition);
      position: relative;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
      border-color: var(--primary);
    }
    .feature-tag {
      position: absolute;
      top: 18px;
      right: 18px;
      font-size: 11px;
      background: #EBF2F4;
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .feature-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .feature-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .feature-points {
      list-style: none;
      font-size: 13px;
      color: var(--text-muted);
    }
    .feature-points li {
      margin-bottom: 6px;
      position: relative;
      padding-left: 14px;
    }
    .feature-points li::before {
      content: "•";
      position: absolute;
      left: 0;
      color: var(--accent);
      font-size: 18px;
      line-height: 1;
    }

    /* 板块 04: 产品矩阵三列对比 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 36px 28px;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .matrix-card.featured {
      border: 2px solid var(--accent);
      box-shadow: var(--shadow-lg);
    }
    .matrix-badge-top {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent);
      color: #fff;
      font-size: 12px;
      font-weight: 600;
      padding: 3px 14px;
      border-radius: 12px;
    }
    .matrix-edition {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .matrix-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 42px;
    }
    .matrix-list {
      list-style: none;
      margin-bottom: 30px;
      flex-grow: 1;
    }
    .matrix-list li {
      font-size: 14px;
      color: var(--text-muted);
      padding: 8px 0;
      border-bottom: 1px dashed #EDF2F7;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 板块 05: 深色工程数字底座 */
    .pillar-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .stepper-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .stepper-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      background: #18222C;
      padding: 18px 22px;
      border-radius: var(--radius);
      border-left: 3px solid var(--accent);
    }
    .stepper-num {
      font-size: 20px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1;
    }
    .stepper-item h4 {
      font-size: 16px;
      margin-bottom: 4px;
      color: #fff;
    }
    .stepper-item p {
      font-size: 13px;
      color: #A0AEC0;
      line-height: 1.5;
    }

    /* 板块 06: 项目级标杆故事 */
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
    }
    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-body {
      padding: 40px;
    }
    .case-tag {
      font-size: 12px;
      background: rgba(15, 76, 92, 0.1);
      color: var(--primary);
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .case-title {
      font-size: 22px;
      font-weight: 700;
      margin: 12px 0 16px;
    }
    .case-data-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      background: var(--bg-main);
      padding: 16px;
      border-radius: var(--radius-sm);
      margin: 20px 0;
    }
    .case-data-num {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
    }
    .case-data-label {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 板块 07: 数字化效能指标带 */
    .metric-strip {
      background: var(--primary);
      color: #FFFFFF;
      padding: 50px 0;
    }
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-number {
      font-size: 40px;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-desc {
      font-size: 14px;
      color: #CBD5E0;
    }

    /* 板块 08: 评价墙 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px;
      box-shadow: var(--shadow-sm);
    }
    .review-quote {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
      font-style: italic;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #EDF2F7;
      padding-top: 14px;
    }
    .reviewer-role {
      font-size: 12px;
      color: var(--text-light);
    }
    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
    }

    /* 板块 09: 资讯摘要卡片 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      transition: var(--transition);
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
    }
    .news-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .news-content {
      padding: 22px;
    }
    .news-cat {
      font-size: 12px;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 6px;
    }
    .news-title {
      font-size: 16px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
    }
    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 10: FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--primary);
    }
    .faq-item.active .faq-question::after {
      content: "-";
    }
    .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;
    }

    /* 板块 11: 转型保障条 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-box {
      text-align: center;
      background: #FFFFFF;
      padding: 26px 16px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }
    .guarantee-icon {
      font-size: 26px;
      margin-bottom: 10px;
      color: var(--primary);
    }
    .guarantee-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .guarantee-desc {
      font-size: 13px;
      color: var(--text-light);
      line-height: 1.5;
    }

    /* 板块 12: 伙伴 Logo 矩阵 */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
      text-align: center;
    }
    .partner-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      padding: 16px 10px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    /* 板块 13: 集中转化 CTA */
    .cta-card {
      background: linear-gradient(135deg, var(--primary), #1B4965);
      border-radius: var(--radius);
      padding: 50px 40px;
      color: #FFFFFF;
      text-align: center;
    }
    .cta-card h3 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .cta-card p {
      font-size: 15px;
      color: #E2E8F0;
      margin-bottom: 30px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }
    .cta-form {
      display: flex;
      max-width: 560px;
      margin: 0 auto;
      gap: 12px;
    }
    .cta-form input {
      flex-grow: 1;
      height: 48px;
      padding: 0 16px;
      border-radius: var(--radius-sm);
      border: none;
      outline: none;
      font-size: 14px;
    }

    /* 页脚 */
    .footer {
      background: var(--dark);
      color: #A0AEC0;
      padding: 60px 0 30px;
      font-size: 13px;
      border-top: 1px solid #2D3748;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-title {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #2D3748;
      padding-top: 24px;
      text-align: center;
      font-size: 12px;
    }

    /* 移动端菜单控制 */
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .feature-grid, .matrix-grid, .news-grid, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .partner-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-card {
        grid-template-columns: 1fr;
      }
      .case-media img {
        height: 240px;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .nav-toggle {
        display: block;
      }
      .hero-grid, .specs-grid, .pillar-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .feature-grid, .matrix-grid, .news-grid, .review-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .metric-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 26px;
      }
      .hero-content h1 {
        font-size: 28px;
      }
      section {
        padding: 50px 0;
      }
    }