/* roulang page: index */
:root {
      --primary: #0055ff;
      --primary-light: #2e72ff;
      --accent: #00e5ff;
      --bg-dark: #0a0a0a;
      --bg-card: #141414;
      --bg-surface: #1a1a1a;
      --text-main: #f0f4f8;
      --text-muted: #9ba1a6;
      --border-subtle: #24292f;
      --border-glow: rgba(0, 229, 255, 0.4);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --container-max: 1240px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      font-size: 16px;
      overflow-x: hidden;
      -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: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(10, 10, 10, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-subtle);
    }

    .top-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .main-nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: #fff;
    }

    .logo-badge {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: #000;
      font-size: 16px;
    }

    .nav-links {
      display: flex;
      list-style: none;
      gap: 28px;
    }

    .nav-links a {
      font-size: 15px;
      color: var(--text-muted);
      font-weight: 500;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* 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;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 18px rgba(0, 85, 255, 0.35);
    }

    .btn-primary:hover {
      background: var(--primary-light);
      box-shadow: 0 6px 24px rgba(0, 85, 255, 0.55);
      transform: translateY(-2px);
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid var(--border-subtle);
      color: var(--text-main);
    }

    .btn-ghost:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(0, 229, 255, 0.05);
    }

    .btn-sm {
      padding: 8px 16px;
      font-size: 13px;
    }

    .btn-lg {
      padding: 16px 36px;
      font-size: 17px;
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
      position: relative;
    }

    .section-alt {
      background-color: #0f0f11;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }

    .section-head {
      margin-bottom: 56px;
      text-align: left;
    }

    .section-head.center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent);
      margin-bottom: 12px;
      background: rgba(0, 229, 255, 0.08);
      padding: 4px 12px;
      border-radius: 99px;
      border: 1px solid rgba(0, 229, 255, 0.2);
    }

    .section-title {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.25;
      color: #fff;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Hero 首屏 */
    .hero-section {
      padding: 120px 0 100px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 85, 255, 0.15) 0%, transparent 60%),
                  radial-gradient(circle at 20% 70%, rgba(0, 229, 255, 0.08) 0%, transparent 50%),
                  url('/assets/images/b416ee48baf5a2eb.jpg') center/cover no-repeat;
      position: relative;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(10, 10, 10, 0.88);
    }

    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 54px;
      line-height: 1.15;
      font-weight: 800;
      color: #fff;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }

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

    .hero-lead {
      font-size: 18px;
      line-height: 1.75;
      color: var(--text-muted);
      margin-bottom: 36px;
    }

    .hero-btns {
      display: flex;
      gap: 16px;
      margin-bottom: 44px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      border-top: 1px solid var(--border-subtle);
      padding-top: 28px;
    }

    .metric-item .val {
      font-size: 30px;
      font-weight: 800;
      color: #fff;
      font-family: monospace;
    }

    .metric-item .label {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    .hero-card {
      background: rgba(20, 20, 20, 0.8);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px;
      backdrop-filter: blur(20px);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    }

    .hero-card:hover {
      border-color: var(--accent);
    }

    .stage-preview {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 20px;
      position: relative;
    }

    .stage-preview img {
      width: 100%;
      height: 230px;
      object-fit: cover;
    }

    .stage-status {
      position: absolute;
      top: 12px;
      right: 12px;
      background: rgba(0, 0, 0, 0.7);
      border: 1px solid var(--accent);
      padding: 4px 10px;
      border-radius: 99px;
      font-size: 12px;
      color: var(--accent);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .stage-status::before {
      content: '';
      width: 6px;
      height: 6px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }

    /* 痛点对比三列 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .pain-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      transition: var(--transition);
      position: relative;
    }

    .pain-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }

    .pain-index {
      font-size: 32px;
      font-weight: 800;
      color: rgba(255, 255, 255, 0.1);
      margin-bottom: 16px;
      font-family: monospace;
    }

    .pain-title {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }

    .pain-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 解决方案板块 */
    .solution-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }

    .solution-visual {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      position: relative;
    }

    .solution-visual img {
      width: 100%;
      height: 440px;
      object-fit: cover;
    }

    .solution-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 32px;
    }

    .solution-point-item {
      display: flex;
      gap: 16px;
    }

    .point-icon {
      width: 28px;
      height: 28px;
      flex-shrink: 0;
      border-radius: 50%;
      background: rgba(0, 85, 255, 0.15);
      border: 1px solid var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      margin-top: 2px;
    }

    .point-text h4 {
      font-size: 17px;
      color: #fff;
      margin-bottom: 6px;
    }

    .point-text p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4步流程 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      position: relative;
      transition: var(--transition);
    }

    .step-card:hover {
      border-color: var(--accent);
      box-shadow: 0 10px 30px rgba(0, 229, 255, 0.08);
    }

    .step-num {
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 24px;
      font-size: 18px;
    }

    .step-name {
      font-size: 18px;
      color: #fff;
      margin-bottom: 12px;
      font-weight: 600;
    }

    .step-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 6大优势 2x3 网格 */
    .features-grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-box {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      transition: var(--transition);
    }

    .feature-box:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }

    .feature-box .feat-kpi {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: 0.5px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .feature-box h3 {
      font-size: 20px;
      color: #fff;
      margin-bottom: 12px;
    }

    .feature-box p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 热门产品 3卡片 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

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

    .product-card:hover {
      border-color: var(--accent);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
    }

    .product-thumb {
      height: 210px;
      overflow: hidden;
      position: relative;
    }

    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .product-card:hover .product-thumb img {
      transform: scale(1.05);
    }

    .product-badge-overlay {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(10, 10, 10, 0.85);
      border: 1px solid var(--border-subtle);
      color: #fff;
      font-size: 12px;
      padding: 3px 10px;
      border-radius: 99px;
    }

    .product-body {
      padding: 28px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .product-body h3 {
      font-size: 20px;
      color: #fff;
      margin-bottom: 10px;
    }

    .product-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }

    .tag-item {
      font-size: 12px;
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      color: var(--text-muted);
    }

    /* 理念与深度案例 */
    .immersive-section {
      background: radial-gradient(circle at 10% 50%, rgba(0, 85, 255, 0.12), transparent 50%),
                  linear-gradient(180deg, #0a0a0a 0%, #11141a 100%);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }

    .showcase-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .showcase-text h2 {
      font-size: 34px;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .showcase-text p {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }

    .dual-screen-wrap {
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
    }

    .dual-screen-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    /* 用户口碑 Testimonials */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .testi-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .testi-card:hover {
      border-color: var(--border-glow);
    }

    .testi-comment {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: normal;
    }

    .testi-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 16px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--accent);
      font-size: 16px;
    }

    .author-info h4 {
      font-size: 15px;
      color: #fff;
    }

    .author-info span {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 数据统计 KPI */
    .stats-bar-inner {
      background: linear-gradient(135deg, rgba(0, 85, 255, 0.08), rgba(0, 229, 255, 0.04));
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 48px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .stat-box .num {
      font-size: 42px;
      font-weight: 800;
      color: #fff;
      font-family: monospace;
      margin-bottom: 8px;
    }

    .stat-box .num span {
      color: var(--accent);
      font-size: 28px;
    }

    .stat-box .desc {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 业务适用场景 Personas */
    .personas-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .persona-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      transition: var(--transition);
      cursor: default;
    }

    .persona-card:hover {
      border-color: var(--accent);
      background: var(--bg-surface);
      transform: translateY(-4px);
    }

    .persona-tag {
      font-size: 12px;
      color: var(--accent);
      margin-bottom: 12px;
      font-weight: 600;
    }

    .persona-card h3 {
      font-size: 18px;
      color: #fff;
      margin-bottom: 12px;
    }

    .persona-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 新闻技术动态 */
    .news-table {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .news-item:hover {
      border-color: var(--primary);
    }

    .news-date {
      font-size: 13px;
      color: var(--accent);
      margin-bottom: 12px;
      font-family: monospace;
    }

    .news-title {
      font-size: 18px;
      color: #fff;
      font-weight: 600;
      line-height: 1.4;
      margin-bottom: 12px;
    }

    .news-summary {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .news-link {
      font-size: 14px;
      color: var(--primary-light);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .news-link:hover {
      color: var(--accent);
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .faq-question {
      padding: 22px 24px;
      font-size: 17px;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-icon {
      font-size: 20px;
      transition: var(--transition);
      color: var(--text-muted);
    }

    .faq-answer {
      padding: 0 24px 22px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 底部 CTA 转化区 */
    .cta-banner-section {
      padding: 110px 0;
      background: radial-gradient(circle at 50% 50%, rgba(0, 85, 255, 0.22) 0%, rgba(10, 10, 10, 0.95) 75%),
                  url('/assets/images/99bfd474794a942a.jpg') center/cover no-repeat;
      text-align: center;
      position: relative;
      border-top: 1px solid var(--border-subtle);
    }

    .cta-banner-content {
      max-width: 760px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }

    .cta-banner-content h2 {
      font-size: 40px;
      color: #fff;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .cta-banner-content p {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
    }

    /* 页脚 */
    .site-footer {
      background-color: #070708;
      border-top: 1px solid var(--border-subtle);
      padding: 70px 0 30px;
      color: var(--text-muted);
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 56px;
    }

    .footer-brand-title {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-desc {
      line-height: 1.7;
      margin-bottom: 20px;
      font-size: 14px;
      color: var(--text-muted);
    }

    .footer-col h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 20px;
      font-weight: 600;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }

    .footer-bottom-links {
      display: flex;
      gap: 24px;
    }

    /* 响应式断点 */
    @media (max-width: 1200px) {
      .hero-grid,
      .solution-split,
      .showcase-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .features-grid-6,
      .products-grid,
      .news-table,
      .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .personas-grid,
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-bar-inner {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .top-bar {
        display: none;
      }
      .nav-links {
        display: none;
      }
      .hero-content h1 {
        font-size: 34px;
      }
      .section-title {
        font-size: 26px;
      }
      .cards-grid-3,
      .features-grid-6,
      .products-grid,
      .news-table,
      .testimonial-grid,
      .personas-grid,
      .steps-grid,
      .stats-bar-inner,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .hero-btns {
        flex-direction: column;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }