/* roulang page: index */
/* 全局变量与设计规范 */
    :root {
      --bg-dark: #070b14;
      --bg-darker: #04070d;
      --bg-card: rgba(15, 23, 42, 0.68);
      --bg-card-hover: rgba(22, 36, 65, 0.85);
      --primary-blue: #1e60ff;
      --neon-cyan: #00d2ff;
      --accent-teal: #00f5d4;
      --accent-purple: #7b2cbf;
      --text-main: #ffffff;
      --text-muted: #a0aec0;
      --text-dim: #64748b;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(0, 210, 255, 0.45);
      --glass-blur: blur(16px);
      --glow-shadow: 0 0 25px rgba(0, 210, 255, 0.25);
      --container-max: 1280px;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-dark);
    }

    body {
      font-family: var(--font-family);
      background: radial-gradient(circle at 50% 0%, #101c38 0%, #070b14 60%, #030508 100%);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部辅助条 */
    .topbar {
      background: rgba(4, 7, 13, 0.9);
      border-bottom: 1px solid var(--border-color);
      font-size: 0.85rem;
      color: var(--text-dim);
      padding: 6px 0;
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .topbar-left, .topbar-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .topbar-tag {
      color: var(--neon-cyan);
      background: rgba(0, 210, 255, 0.1);
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      font-size: 0.75rem;
      border: 1px solid rgba(0, 210, 255, 0.25);
    }

    /* 主导航栏 */
    .main-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 11, 20, 0.85);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #fff;
    }
    .nav-logo-badge {
      background: linear-gradient(135deg, var(--primary-blue), var(--neon-cyan));
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 800;
      box-shadow: 0 0 12px rgba(0, 210, 255, 0.4);
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 24px;
      align-items: center;
    }
    .nav-link {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--neon-cyan);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--neon-cyan);
      box-shadow: 0 0 8px var(--neon-cyan);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .nav-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-color);
      color: #fff;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    /* 按钮样式系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 0.95rem;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: none;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #1e60ff 0%, #00d2ff 100%);
      color: #fff;
      box-shadow: 0 4px 15px rgba(0, 210, 255, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 25px rgba(0, 210, 255, 0.5);
      color: #fff;
    }
    .btn-secondary {
      background: rgba(15, 23, 42, 0.7);
      color: var(--text-main);
      border: 1px solid rgba(0, 210, 255, 0.3);
      backdrop-filter: var(--glass-blur);
    }
    .btn-secondary:hover {
      background: rgba(0, 210, 255, 0.15);
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      transform: translateY(-2px);
    }
    .btn-sm {
      padding: 6px 14px;
      font-size: 0.85rem;
    }

    /* Section 通用规范 */
    .section {
      padding: 80px 0;
      position: relative;
    }
    .section-alt {
      background: rgba(11, 19, 43, 0.35);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--neon-cyan);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 10px;
      padding: 4px 12px;
      background: rgba(0, 210, 255, 0.08);
      border: 1px solid rgba(0, 210, 255, 0.2);
      border-radius: var(--radius-full);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      background: linear-gradient(180deg, #ffffff 30%, #a5c3eb 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      line-height: 1.7;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.3s ease;
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: var(--border-glow);
      box-shadow: var(--glow-shadow);
      background: var(--bg-card-hover);
      transform: translateY(-4px);
    }

    /* 1. Hero 板块 */
    .hero-section {
      padding: 70px 0 60px;
      background-image: linear-gradient(to bottom, rgba(7, 11, 20, 0.75), rgba(7, 11, 20, 0.95)), url('/assets/images/9fd9796fd1ec4900.jpg');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 36px;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }
    .hero-h1 {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-h1 span {
      background: linear-gradient(90deg, #00d2ff, #00f5d4);
      -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: 30px;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .hero-roadmap {
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid rgba(0, 210, 255, 0.25);
      border-radius: var(--radius-md);
      padding: 16px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      text-align: left;
    }
    .roadmap-badge {
      background: rgba(0, 245, 212, 0.15);
      color: var(--accent-teal);
      border: 1px solid rgba(0, 245, 212, 0.3);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 700;
    }

    /* 2. 资讯流与热榜 (变体版式：左流右榜) */
    .news-rank-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 30px;
    }
    .news-feed-item {
      display: flex;
      gap: 20px;
      padding: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      transition: all 0.3s;
    }
    .news-feed-item:hover {
      border-color: var(--border-glow);
      transform: translateX(4px);
    }
    .news-thumb {
      width: 140px;
      height: 95px;
      border-radius: var(--radius-sm);
      object-fit: cover;
      flex-shrink: 0;
    }
    .news-info h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: #fff;
    }
    .news-info p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 8px;
    }
    .news-meta {
      font-size: 0.75rem;
      color: var(--text-dim);
      display: flex;
      gap: 12px;
    }
    .rank-list {
      list-style: none;
    }
    .rank-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 14px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .rank-num {
      width: 26px;
      height: 26px;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.85rem;
      color: var(--neon-cyan);
    }
    .rank-item:nth-child(1) .rank-num {
      background: var(--primary-blue);
      color: #fff;
    }
    .rank-item:nth-child(2) .rank-num {
      background: rgba(0, 210, 255, 0.3);
      color: #fff;
    }
    .rank-title {
      font-size: 0.95rem;
      color: var(--text-main);
      flex: 1;
    }

    /* 3. 架构介绍区 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .arch-metric-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .metric-card {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px;
    }
    .metric-val {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--neon-cyan);
      font-family: monospace;
    }
    .metric-label {
      font-size: 0.85rem;
      color: var(--text-dim);
    }
    .arch-preview-wrap {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    }

    /* 4. 六宫格优势矩阵 */
    .grid-3col {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feat-icon {
      width: 48px;
      height: 48px;
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.3);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--neon-cyan);
      font-size: 1.3rem;
      font-weight: bold;
    }

    /* 5. 热门专题条与标签云 */
    .topic-banner {
      background: linear-gradient(90deg, rgba(30, 96, 255, 0.15), rgba(0, 245, 212, 0.15));
      border: 1px solid rgba(0, 210, 255, 0.2);
      border-radius: var(--radius-md);
      padding: 30px;
    }
    .topic-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }
    .topic-tag-item {
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: var(--radius-full);
      font-size: 0.9rem;
      color: var(--text-muted);
      transition: all 0.2s;
    }
    .topic-tag-item:hover {
      border-color: var(--neon-cyan);
      color: #fff;
      background: rgba(0, 210, 255, 0.15);
    }

    /* 6. 3列解决方案对比 */
    .solution-card {
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .solution-card-badge {
      position: absolute;
      top: 20px;
      right: 20px;
      background: var(--primary-blue);
      color: #fff;
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: var(--radius-sm);
    }
    .sol-features {
      list-style: none;
      margin: 20px 0;
      flex: 1;
    }
    .sol-features li {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 10px;
      position: relative;
      padding-left: 20px;
    }
    .sol-features li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--accent-teal);
      font-weight: bold;
    }

    /* 7. 深色案例分析与实战演练 */
    .case-immersive {
      background: radial-gradient(circle at center, #111d38 0%, #060a12 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .case-stat-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 245, 212, 0.1);
      border: 1px solid rgba(0, 245, 212, 0.3);
      color: var(--accent-teal);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      margin-bottom: 16px;
    }

    /* 8. 4列横向计数条 */
    .stats-counter-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: center;
    }
    .stat-strip-num {
      font-size: 2.5rem;
      font-weight: 900;
      color: var(--neon-cyan);
      font-family: monospace;
      margin-bottom: 4px;
    }
    .stat-strip-label {
      font-size: 0.85rem;
      color: var(--text-dim);
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    /* 9. 客户评价与专家口碑 */
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 20px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 2px solid var(--neon-cyan);
      object-fit: cover;
    }
    .review-role {
      font-size: 0.8rem;
      color: var(--text-dim);
    }
    .star-rating {
      color: #ffb703;
      margin-bottom: 12px;
      font-size: 0.9rem;
    }

    /* 10. FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s;
    }
    .faq-item.active {
      border-color: var(--border-glow);
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #fff;
    }
    .faq-arrow {
      transition: transform 0.3s ease;
      font-size: 0.9rem;
      color: var(--neon-cyan);
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 11. 媒体合作与生态伙伴 */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
      align-items: center;
    }
    .partner-box {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px;
      text-align: center;
      font-size: 0.9rem;
      color: var(--text-dim);
      font-weight: 600;
      transition: all 0.2s;
    }
    .partner-box:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      background: rgba(0, 210, 255, 0.05);
    }

    /* 12. 转化收口与预约表单 */
    .cta-banner-wrapper {
      background: linear-gradient(135deg, rgba(30, 96, 255, 0.2) 0%, rgba(123, 44, 191, 0.2) 100%);
      border: 1px solid rgba(0, 210, 255, 0.3);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    }
    .cta-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      background: rgba(4, 7, 13, 0.8);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
    }

    /* 页脚设计 */
    .footer {
      background: var(--bg-darker);
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      color: var(--text-dim);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr repeat(3, 1fr);
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-logo {
      font-size: 1.3rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
      display: inline-block;
    }
    .footer-links-title {
      color: #fff;
      font-weight: 600;
      margin-bottom: 16px;
      font-size: 1rem;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--neon-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.8rem;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 2.4rem; }
      .grid-3col { grid-template-columns: repeat(2, 1fr); }
      .partner-grid { grid-template-columns: repeat(3, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .nav-toggle { display: block; }
      .hero-h1 { font-size: 2rem; }
      .news-rank-grid { grid-template-columns: 1fr; }
      .arch-grid { grid-template-columns: 1fr; }
      .grid-3col { grid-template-columns: 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .stats-counter-strip { grid-template-columns: repeat(2, 1fr); }
      .cta-form-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .topbar-right { display: none; }
      .news-feed-item { flex-direction: column; }
      .news-thumb { width: 100%; height: 160px; }
    }