/* roulang page: index */
:root {
      --primary: #00DC82;
      --primary-hover: #05f08f;
      --accent: #7C3AED;
      --accent-hover: #8B5CF6;
      --bg-dark: #0B0F17;
      --bg-deep: #070A0F;
      --bg-card: #131B2B;
      --bg-card-hover: #1A2438;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --text-light: #64748B;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-highlight: rgba(0, 220, 130, 0.3);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --container-width: 1200px;
      --transition: all 0.25s ease-in-out;
    }

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-main);
      line-height: 1.75;
      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-width);
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* 顶部服务状态条 */
    .topbar {
      background-color: var(--bg-deep);
      border-bottom: 1px solid var(--border-color);
      font-size: 0.85rem;
      padding: 0.5rem 0;
      color: var(--text-muted);
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-main);
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { opacity: 0.6; transform: scale(0.95); }
      50% { opacity: 1; transform: scale(1.1); }
      100% { opacity: 0.6; transform: scale(0.95); }
    }

    /* 主导航栏 */
    .site-header {
      background: rgba(11, 15, 23, 0.85);
      backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 999;
      border-bottom: 1px solid var(--border-color);
    }
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--text-main);
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #000;
      font-weight: 900;
    }
    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
    }
    .nav-link {
      font-size: 0.95rem;
      color: var(--text-muted);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .btn-header {
      background: var(--primary);
      color: #000;
      font-weight: 600;
      padding: 0.55rem 1.25rem;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
    }
    .btn-header:hover {
      background: var(--primary-hover);
      box-shadow: 0 0 15px rgba(0, 220, 130, 0.4);
    }

    /* Section 通用 */
    section {
      padding: 5.5rem 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-deep);
    }
    .section-title-wrap {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 3.5rem auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      text-transform: uppercase;
      color: var(--primary);
      background: rgba(0, 220, 130, 0.1);
      border: 1px solid rgba(0, 220, 130, 0.2);
      padding: 0.25rem 0.75rem;
      border-radius: 999px;
      margin-bottom: 0.75rem;
      letter-spacing: 1px;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 1rem;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 按钮通用 */
    .btn-primary {
      display: inline-block;
      background: var(--primary);
      color: #000;
      font-weight: 600;
      padding: 0.8rem 1.8rem;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      border: 1px solid var(--primary);
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 0 20px rgba(0, 220, 130, 0.35);
      transform: translateY(-2px);
    }
    .btn-secondary {
      display: inline-block;
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-main);
      font-weight: 600;
      padding: 0.8rem 1.8rem;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      border: 1px solid var(--border-color);
      cursor: pointer;
    }
    .btn-secondary:hover {
      border-color: rgba(255, 255, 255, 0.3);
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-2px);
    }

    /* 卡片基础 */
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem;
      transition: var(--transition);
    }
    .card:hover {
      border-color: var(--border-highlight);
      transform: translateY(-4px);
      box-shadow: 0 10px 25px -5px rgba(0, 220, 130, 0.12);
    }

    /* 1. Hero 路线图与订阅结构 */
    .hero-section {
      background: radial-gradient(circle at 50% 0%, rgba(124, 58, 237, 0.15) 0%, rgba(11, 15, 23, 1) 70%), url('/assets/images/bacc4686cc1ceff0.jpg') center/cover no-repeat;
      padding: 6rem 0 5rem 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-inner {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-h1 {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1.5rem;
      letter-spacing: -0.5px;
    }
    .hero-h1 span {
      background: linear-gradient(120deg, #00DC82, #38BDF8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 2.5rem;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 1.25rem;
      margin-bottom: 3.5rem;
      flex-wrap: wrap;
    }
    /* 路线图节点条 */
    .roadmap-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      background: rgba(19, 27, 43, 0.8);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      text-align: left;
    }
    .node-item {
      position: relative;
      padding-left: 1rem;
      border-left: 2px solid rgba(0, 220, 130, 0.3);
    }
    .node-item.active {
      border-left-color: var(--primary);
    }
    .node-tag {
      font-size: 0.75rem;
      color: var(--primary);
      font-weight: 600;
      display: block;
    }
    .node-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin: 0.2rem 0;
    }
    .node-desc {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 2. 分类入口 wall */
    .category-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 1.5rem;
    }
    .cat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .cat-card:hover {
      border-color: var(--border-highlight);
      transform: translateY(-4px);
    }
    .cat-icon {
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 1rem;
    }
    .cat-card h3 {
      font-size: 1.15rem;
      margin-bottom: 0.5rem;
    }
    .cat-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 精选推荐 */
    .featured-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .featured-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .featured-img-wrap {
      height: 180px;
      overflow: hidden;
      position: relative;
    }
    .featured-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .featured-card:hover .featured-img-wrap img {
      transform: scale(1.05);
    }
    .featured-body {
      padding: 1.5rem;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .featured-body h3 {
      font-size: 1.15rem;
      margin-bottom: 0.75rem;
    }
    .featured-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 1.25rem;
      flex: 1;
    }

    /* 4. 资讯动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 0.75rem;
    }
    .news-card h3 {
      font-size: 1.05rem;
      line-height: 1.5;
      margin-bottom: 0.75rem;
    }
    .news-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 5. 排行榜 */
    .rank-table-wrap {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .rank-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .rank-table th, .rank-table td {
      padding: 1.25rem 1.5rem;
      border-bottom: 1px solid var(--border-color);
    }
    .rank-table th {
      background: rgba(255, 255, 255, 0.02);
      font-size: 0.85rem;
      color: var(--text-light);
      text-transform: uppercase;
    }
    .rank-table td {
      font-size: 0.95rem;
    }
    .rank-badge {
      display: inline-block;
      width: 24px;
      height: 24px;
      line-height: 24px;
      text-align: center;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 50%;
      font-size: 0.8rem;
      font-weight: 700;
    }
    .rank-1 { background: #EAB308; color: #000; }
    .rank-2 { background: #94A3B8; color: #000; }
    .rank-3 { background: #B45309; color: #fff; }

    /* 6. 核心优势六矩阵 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }

    /* 7. 场景演示 (案例/证据) */
    .showcase-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      margin-bottom: 4rem;
    }
    .showcase-row:last-child {
      margin-bottom: 0;
    }
    .showcase-row.reverse {
      direction: rtl;
    }
    .showcase-row.reverse .showcase-text {
      direction: ltr;
    }
    .showcase-img {
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

    /* 8. 关键数据指标 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      background: linear-gradient(180deg, rgba(19, 27, 43, 0.6) 0%, rgba(7, 10, 15, 0.8) 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      text-align: center;
    }
    .metric-value {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 0.5rem;
    }
    .metric-label {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    /* 9. 合作伙伴 & 开发者口碑 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }
    .testi-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
    }
    .testi-header {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 1rem;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }
    .testi-info h4 {
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .testi-info span {
      font-size: 0.8rem;
      color: var(--text-light);
    }
    .testi-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 10. 异议拆解 FAQ */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-question {
      padding: 1.25rem 1.5rem;
      font-weight: 600;
      font-size: 1.05rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-question::after {
      content: "+";
      font-size: 1.3rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-question::after {
      content: "-";
      transform: rotate(180deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: rgba(0, 0, 0, 0.2);
    }
    .faq-answer-inner {
      padding: 1rem 1.5rem 1.5rem 1.5rem;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
    }

    /* 11. 保障条 */
    .guarantee-bar {
      background: linear-gradient(90deg, rgba(0, 220, 130, 0.08) 0%, rgba(124, 58, 237, 0.08) 100%);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 3rem 0;
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .guarantee-item h4 {
      font-size: 1.1rem;
      margin-bottom: 0.5rem;
      color: var(--text-main);
    }
    .guarantee-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 12. 试用与接入强转化收口 */
    .cta-box {
      background: radial-gradient(circle at 50% 50%, rgba(0, 220, 130, 0.12) 0%, rgba(19, 27, 43, 0.9) 100%);
      border: 1px solid var(--border-highlight);
      border-radius: var(--radius-lg);
      padding: 4rem 2rem;
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }
    .cta-box h2 {
      font-size: 2.2rem;
      margin-bottom: 1rem;
    }
    .cta-box p {
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 600px;
      margin: 0 auto 2rem auto;
    }

    /* 页脚 */
    .site-footer {
      background-color: var(--bg-deep);
      border-top: 1px solid var(--border-color);
      padding: 4.5rem 0 2rem 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-col h4 {
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
      color: var(--text-main);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }
    .footer-links a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: var(--text-light);
      flex-wrap: wrap;
      gap: 1rem;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .featured-grid, .news-grid, .features-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .roadmap-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .roadmap-bar {
        grid-template-columns: 1fr;
      }
      .featured-grid, .news-grid, .features-grid, .testimonials-grid, .metrics-bar, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .showcase-row, .showcase-row.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .rank-table-wrap {
        overflow-x: auto;
      }
      .section-title {
        font-size: 1.75rem;
      }
    }