/* roulang page: index */
:root {
      --bg-dark: #0B0E14;
      --bg-surface: #121721;
      --bg-card: rgba(18, 23, 33, 0.75);
      --bg-card-hover: rgba(28, 36, 51, 0.85);
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --text-dim: #6B7280;
      --primary: #00F2FF;
      --primary-hover: #33F5FF;
      --primary-glow: rgba(0, 242, 255, 0.35);
      --purple: #8B5CF6;
      --purple-glow: rgba(139, 92, 246, 0.3);
      --border-line: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(0, 242, 255, 0.5);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --container-max: 1240px;
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(11, 14, 20, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
      height: 72px;
      display: flex;
      align-items: center;
    }

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

    .logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #FFF;
    }

    .logo-badge {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--purple));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 15px var(--primary-glow);
    }

    .logo-badge svg {
      width: 18px;
      height: 18px;
      fill: #0B0E14;
    }

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

    .nav-link {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }

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

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #0B0E14;
      background: var(--primary);
      border-radius: var(--radius-sm);
      border: 1px solid var(--primary);
      box-shadow: 0 0 16px var(--primary-glow);
      cursor: pointer;
    }

    .nav-cta:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: 0 0 22px rgba(0, 242, 255, 0.5);
    }

    /* 按钮系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      cursor: pointer;
      gap: 8px;
    }

    .btn-primary {
      background: var(--primary);
      color: #0B0E14;
      border: 1px solid var(--primary);
      box-shadow: 0 4px 20px var(--primary-glow);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 26px rgba(0, 242, 255, 0.55);
    }

    .btn-outline {
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-main);
      border: 1px solid var(--border-line);
      backdrop-filter: blur(8px);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(0, 242, 255, 0.08);
      transform: translateY(-2px);
    }

    /* 板块通用 */
    .section-padding {
      padding: 88px 0;
      position: relative;
    }

    .section-header {
      margin-bottom: 52px;
      max-width: 820px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--primary);
      background: rgba(0, 242, 255, 0.1);
      border: 1px solid rgba(0, 242, 255, 0.25);
      padding: 4px 12px;
      border-radius: 99px;
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 2.15rem;
      line-height: 1.35;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* 板块 1: Hero 首屏 (全宽浅色微明暗交错顶栏 + 矮横幅) */
    .hero-banner {
      position: relative;
      background: linear-gradient(180deg, #101622 0%, var(--bg-dark) 100%);
      border-bottom: 1px solid var(--border-line);
      padding: 64px 0 80px 0;
      overflow: hidden;
    }

    .hero-banner::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: radial-gradient(circle at 75% 20%, rgba(0, 242, 255, 0.12) 0%, transparent 45%),
                        radial-gradient(circle at 20% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 40%);
      pointer-events: none;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .hero-content h1 {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero-content h1 span {
      background: linear-gradient(90deg, #FFFFFF, var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-intro {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
      max-width: 640px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .hero-stage {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(0, 242, 255, 0.2);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 242, 255, 0.15);
    }

    .hero-stage img {
      width: 100%;
      height: 340px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .hero-stage:hover img {
      transform: scale(1.02);
    }

    /* 板块 2: 能力概览 (Logo 墙与认证) */
    .section-cert {
      padding: 40px 0;
      background: rgba(18, 23, 33, 0.5);
      border-bottom: 1px solid var(--border-line);
    }

    .cert-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 20px;
      align-items: center;
    }

    .cert-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 16px 12px;
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-sm);
      text-align: center;
    }

    .cert-item strong {
      font-size: 1.05rem;
      color: #FFF;
      display: block;
      margin-bottom: 4px;
    }

    .cert-item span {
      font-size: 0.8rem;
      color: var(--text-dim);
    }

    /* 板块 3: 核心痛点切入 */
    .section-pains {
      background: var(--bg-dark);
      border-bottom: 1px solid var(--border-line);
    }

    .pain-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pain-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      position: relative;
      transition: all 0.3s ease;
    }

    .pain-card:hover {
      border-color: rgba(239, 68, 68, 0.4);
      background: var(--bg-card-hover);
      transform: translateY(-4px);
    }

    .pain-indicator {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(239, 68, 68, 0.1);
      border: 1px solid rgba(239, 68, 68, 0.3);
      color: #EF4444;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .pain-card h3 {
      font-size: 1.25rem;
      color: #FFF;
      margin-bottom: 12px;
    }

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

    /* 板块 4: 产品核心功能介绍 (方案矩阵 2x3) */
    .section-matrix {
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border-line);
    }

    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .matrix-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .matrix-card:hover {
      border-color: var(--primary);
      box-shadow: 0 10px 30px rgba(0, 242, 255, 0.1);
      transform: translateY(-4px);
    }

    .matrix-icon {
      width: 46px;
      height: 46px;
      border-radius: var(--radius-sm);
      background: rgba(0, 242, 255, 0.1);
      border: 1px solid rgba(0, 242, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
    }

    .matrix-card h3 {
      font-size: 1.2rem;
      color: #FFF;
      margin-bottom: 12px;
    }

    .matrix-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 5: 技术优势与参数 */
    .section-tech {
      background: var(--bg-dark);
      border-bottom: 1px solid var(--border-line);
    }

    .tech-flex {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .tech-image {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-line);
    }

    .tech-image img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .tech-specs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 28px;
    }

    .spec-box {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--border-line);
      padding: 18px;
      border-radius: var(--radius-sm);
    }

    .spec-value {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    /* 板块 6: 智能运营场景演示 (交付与调度) */
    .section-scenarios {
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border-line);
    }

    .scenario-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--purple);
      margin-bottom: 12px;
    }

    .step-card h4 {
      font-size: 1.1rem;
      color: #FFF;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 7: 数据看板概览 (滚动统计条) */
    .section-metrics {
      background: linear-gradient(180deg, #0B0E14 0%, #121824 100%);
      border-bottom: 1px solid var(--border-line);
      padding: 60px 0;
    }

    .metric-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-item {
      padding: 24px 16px;
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .metric-num {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
      letter-spacing: -1px;
    }

    .metric-title {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    /* 板块 8: 成功案例与用户故事 */
    .section-cases {
      background: var(--bg-dark);
      border-bottom: 1px solid var(--border-line);
    }

    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .case-feedback {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: italic;
    }

    .case-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .case-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #0B0E14;
    }

    .case-info strong {
      display: block;
      color: #FFF;
      font-size: 0.95rem;
    }

    .case-info span {
      font-size: 0.8rem;
      color: var(--text-dim);
    }

    /* 板块 9: 竞品对比 (差异化矩阵) */
    .section-comparison {
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border-line);
    }

    .comp-table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-line);
      background: var(--bg-card);
    }

    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .comp-table th, .comp-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-line);
      font-size: 0.95rem;
    }

    .comp-table th {
      background: rgba(255, 255, 255, 0.03);
      color: #FFF;
      font-weight: 600;
    }

    .comp-table tr:last-child td {
      border-bottom: none;
    }

    .comp-highlight {
      color: var(--primary);
      font-weight: 600;
    }

    .comp-table td:nth-child(2) {
      background: rgba(0, 242, 255, 0.02);
    }

    /* 板块 10: 资讯摘要 (SEO 内容池) */
    .section-articles {
      background: var(--bg-dark);
      border-bottom: 1px solid var(--border-line);
    }

    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .article-thumb {
      height: 190px;
      width: 100%;
      object-fit: cover;
    }

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

    .article-date {
      font-size: 0.8rem;
      color: var(--text-dim);
      margin-bottom: 8px;
    }

    .article-body h3 {
      font-size: 1.15rem;
      color: #FFF;
      margin-bottom: 12px;
      line-height: 1.45;
    }

    .article-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .article-link {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块 11: FAQ 手风琴 */
    .section-faq {
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border-line);
    }

    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #FFF;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary);
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: all 0.3s ease;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
      max-height: 240px;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 板块 12: 底部询盘与双CTA (收口) */
    .section-cta {
      position: relative;
      padding: 80px 0;
      background: linear-gradient(135deg, #101726 0%, #0B0E14 100%);
      border-bottom: 1px solid var(--border-line);
      text-align: center;
      overflow: hidden;
    }

    .section-cta::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: radial-gradient(circle at 50% 50%, rgba(0, 242, 255, 0.08) 0%, transparent 60%);
      pointer-events: none;
    }

    .cta-inner {
      max-width: 760px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .cta-inner h2 {
      font-size: 2.2rem;
      color: #FFF;
      margin-bottom: 18px;
    }

    .cta-inner p {
      font-size: 1.05rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
    }

    /* 页脚 */
    .site-footer {
      background: #07090D;
      padding: 60px 0 32px 0;
      color: var(--text-dim);
      font-size: 0.9rem;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-brand h4 {
      color: #FFF;
      font-size: 1.15rem;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
      color: var(--text-muted);
    }

    .footer-col h5 {
      color: #FFF;
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 600;
    }

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

    .footer-links a {
      color: var(--text-muted);
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .footer-contact-item {
      display: flex;
      gap: 10px;
      margin-bottom: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .hero-stage img {
        height: 280px;
      }
      .cert-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .pain-cards, .matrix-grid, .cases-grid, .article-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .tech-flex {
        grid-template-columns: 1fr;
      }
      .scenario-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .site-header {
        height: 64px;
      }
      .nav-menu {
        display: none;
      }
      .hero-content h1 {
        font-size: 2rem;
      }
      .section-padding {
        padding: 56px 0;
      }
      .section-title {
        font-size: 1.65rem;
      }
      .pain-cards, .matrix-grid, .cases-grid, .article-grid, .scenario-steps {
        grid-template-columns: 1fr;
      }
      .cert-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }