/* roulang page: index */
:root {
      --bg-dark: #0D1117;
      --bg-card: #161B22;
      --bg-deep: #090D12;
      --accent-cyan: #00F2FE;
      --accent-purple: #4FACFE;
      --accent-gold: #FFB800;
      --text-white: #F0F6FC;
      --text-muted: #8B949E;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(0, 242, 254, 0.35);
      --glow-gradient: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
      --card-radius: 14px;
      --transition-smooth: 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-white);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--accent-cyan);
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    a:hover {
      color: #79f9ff;
    }

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

    /* 悬浮胶囊导航 */
    .capsule-header {
      position: fixed;
      top: 18px;
      left: 0;
      right: 0;
      z-index: 999;
      padding: 0 16px;
    }
    .capsule-nav-container {
      max-width: 1140px;
      margin: 0 auto;
      background: rgba(22, 27, 34, 0.78);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-color);
      border-radius: 50px;
      padding: 10px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-white);
      letter-spacing: 0.5px;
    }
    .brand-logo .logo-badge {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--glow-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #000;
      font-weight: 900;
      font-size: 1rem;
    }
    .nav-links {
      display: flex;
      list-style: none;
      margin: 0;
      gap: 24px;
    }
    .nav-links li a {
      color: var(--text-muted);
      font-size: 0.92rem;
      font-weight: 500;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--text-white);
    }
    .nav-btn {
      background: var(--glow-gradient);
      color: #041019;
      font-weight: 600;
      padding: 8px 20px;
      border-radius: 30px;
      font-size: 0.88rem;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.25);
      border: none;
      cursor: pointer;
    }
    .nav-btn:hover {
      box-shadow: 0 0 22px rgba(0, 242, 254, 0.5);
      color: #000;
      transform: translateY(-1px);
    }

    /* 布局容器与Section通用 */
    .section-wrap {
      padding: 90px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: var(--bg-deep);
    }
    .grid-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-header {
      margin-bottom: 48px;
      text-align: left;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--accent-cyan);
      margin-bottom: 12px;
      padding: 4px 12px;
      background: rgba(0, 242, 254, 0.08);
      border-radius: 4px;
      border: 1px solid rgba(0, 242, 254, 0.2);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      line-height: 1.35;
      color: var(--text-white);
      margin-bottom: 14px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 820px;
      line-height: 1.8;
      margin-bottom: 0;
    }

    /* 卡片体系 */
    .ui-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px;
      transition: var(--transition-smooth);
      height: 100%;
      position: relative;
    }
    .ui-card:hover {
      border-color: var(--border-focus);
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
    }

    /* 按钮样式 */
    .btn-glow {
      display: inline-block;
      background: var(--glow-gradient);
      color: #041019;
      font-weight: 600;
      padding: 13px 32px;
      border-radius: 8px;
      font-size: 1rem;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 20px rgba(0, 242, 254, 0.28);
    }
    .btn-glow:hover {
      color: #000;
      box-shadow: 0 6px 28px rgba(0, 242, 254, 0.5);
      transform: translateY(-2px);
    }
    .btn-outline {
      display: inline-block;
      background: transparent;
      color: var(--text-white);
      border: 1px solid rgba(255, 255, 255, 0.2);
      font-weight: 500;
      padding: 12px 28px;
      border-radius: 8px;
      font-size: 1rem;
      margin-left: 14px;
    }
    .btn-outline:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }

    /* 1. Hero 区域：提问式获客 + 痛点直击 + 首屏表单 */
    #hero {
      padding-top: 150px;
      padding-bottom: 90px;
      background: linear-gradient(180deg, rgba(13, 17, 23, 0.8) 0%, rgba(13, 17, 23, 0.95) 100%),
                  url('/assets/images/c4cf70887f5a36c0.jpg') center/cover no-repeat;
      position: relative;
    }
    .hero-box {
      max-width: 900px;
    }
    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #FFFFFF;
    }
    .hero-h1 span {
      background: var(--glow-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.15rem;
      color: #C9D1D9;
      line-height: 1.85;
      margin-bottom: 34px;
    }
    .hero-lead strong {
      color: var(--accent-gold);
      font-weight: 600;
    }
    .lead-form-box {
      background: rgba(22, 27, 34, 0.85);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(0, 242, 254, 0.25);
      border-radius: 12px;
      padding: 24px;
      max-width: 680px;
      margin-bottom: 24px;
    }
    .lead-form-grid {
      display: flex;
      gap: 12px;
    }
    .lead-input {
      flex: 1;
      background: #090D12;
      border: 1px solid var(--border-color);
      color: #fff;
      padding: 13px 18px;
      border-radius: 6px;
      font-size: 0.95rem;
    }
    .lead-input:focus {
      outline: none;
      border-color: var(--accent-cyan);
    }
    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 20px;
      font-size: 0.86rem;
      color: var(--text-muted);
    }
    .trust-dot {
      width: 8px;
      height: 8px;
      background: #3fb950;
      border-radius: 50%;
      display: inline-block;
      margin-right: 6px;
    }

    /* 2. 指标看板 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 24px 20px;
      text-align: center;
    }
    .metric-num {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 6px;
      font-family: Consolas, monospace;
    }
    .metric-title {
      font-size: 0.92rem;
      color: var(--text-white);
      font-weight: 600;
      margin-bottom: 4px;
    }
    .metric-desc {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 3. 服务矩阵 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--accent-cyan);
      font-weight: 700;
      font-size: 1.2rem;
    }

    /* 4. 技术底座深度介绍 */
    .tech-flex {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .tech-image {
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
    }
    .tech-list {
      list-style: none;
      margin-top: 20px;
    }
    .tech-list li {
      margin-bottom: 14px;
      padding-left: 24px;
      position: relative;
      color: #C9D1D9;
      font-size: 0.95rem;
    }
    .tech-list li::before {
      content: "✔";
      position: absolute;
      left: 0;
      color: var(--accent-cyan);
      font-weight: 700;
    }

    /* 5. 热门套件 */
    .suite-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .suite-img-box {
      border-radius: 8px;
      overflow: hidden;
      margin-bottom: 16px;
      height: 160px;
      background: #000;
    }
    .suite-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 6. 对比管线 */
    .diff-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 10px;
      background: var(--bg-card);
      border-radius: var(--card-radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }
    .diff-table th, .diff-table td {
      padding: 18px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
    }
    .diff-table th {
      background: rgba(0, 0, 0, 0.35);
      color: var(--text-white);
      font-size: 1rem;
    }
    .diff-table td {
      font-size: 0.92rem;
      color: var(--text-muted);
    }
    .diff-table td.highlight {
      color: var(--accent-cyan);
      font-weight: 600;
      background: rgba(0, 242, 254, 0.03);
    }

    /* 7. 实战案例工坊 */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #11161D;
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
    }
    .case-thumb {
      height: 200px;
      overflow: hidden;
    }
    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-card:hover .case-thumb img {
      transform: scale(1.05);
    }
    .case-info {
      padding: 20px;
    }

    /* 8. 制作团队复盘 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }
    .quote-box {
      font-style: italic;
      color: #C9D1D9;
      margin-bottom: 14px;
      border-left: 3px solid var(--accent-cyan);
      padding-left: 14px;
    }

    /* 9. 里程碑时间线 */
    .timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .timeline-node {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 20px;
      position: relative;
    }
    .timeline-node::before {
      content: "";
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--accent-cyan);
      position: absolute;
      top: -6px;
      left: 20px;
    }
    .node-year {
      font-size: 0.85rem;
      font-family: Consolas, monospace;
      color: var(--accent-cyan);
      margin-bottom: 6px;
      font-weight: 700;
    }

    /* 10. 精选资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    /* 11. 平台保障 */
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    /* 12. 快速解答指南 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .step-badge {
      font-size: 1.6rem;
      font-weight: 800;
      color: rgba(0, 242, 254, 0.4);
      margin-bottom: 12px;
      font-family: Consolas, monospace;
    }

    /* 13. FAQ 手风琴 */
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--text-white);
      user-select: none;
    }
    .faq-question:hover {
      background: rgba(255, 255, 255, 0.02);
    }
    .faq-answer {
      padding: 0 24px 20px 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.8;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-icon {
      font-size: 1.2rem;
      color: var(--accent-cyan);
      transition: transform 0.2s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 14. 转化收口 */
    .cta-card-full {
      background: linear-gradient(135deg, rgba(22, 27, 34, 0.95) 0%, rgba(9, 13, 18, 0.95) 100%),
                  url('/assets/images/2f87aa8a19eb2670.jpg') center/cover no-repeat;
      border: 1px solid rgba(0, 242, 254, 0.35);
      border-radius: 18px;
      padding: 56px 40px;
      text-align: center;
      box-shadow: 0 0 35px rgba(0, 242, 254, 0.1);
    }
    .cta-form-inline {
      max-width: 540px;
      margin: 28px auto 14px;
      display: flex;
      gap: 12px;
    }

    /* 页脚 */
    .site-footer {
      background: #06090D;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 64px 0 30px;
      color: var(--text-muted);
      font-size: 0.88rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-col h4 {
      color: var(--text-white);
      font-size: 0.98rem;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .footer-col ul {
      list-style: none;
      margin: 0;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      color: var(--text-muted);
    }
    .footer-col ul li a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .metric-grid, .timeline, .assurance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .matrix-grid, .suite-grid, .case-gallery-grid, .news-grid, .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .tech-flex {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hero-h1 {
        font-size: 2.1rem;
      }
      .lead-form-grid, .cta-form-inline {
        flex-direction: column;
      }
      .matrix-grid, .suite-grid, .case-gallery-grid, .news-grid, .steps-grid, .story-grid, .metric-grid, .timeline, .assurance-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .btn-outline {
        margin-left: 0;
        margin-top: 12px;
      }
    }