/* roulang page: index */
/* 核心视觉变量与系统规范 */
    :root {
      --bg-main: #0F1117;
      --bg-card: #181B26;
      --bg-card-hover: #222738;
      --bg-subtle: #12151F;
      --primary-purple: #6C5CE7;
      --primary-glow: rgba(108, 92, 231, 0.35);
      --neon-green: #00FFA3;
      --neon-green-glow: rgba(0, 255, 163, 0.3);
      --text-main: #FFFFFF;
      --text-muted: #D1D5DB;
      --text-dim: #9CA3AF;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-accent: rgba(108, 92, 231, 0.4);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

    /* 基础重置 */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.75;
    }
    body {
      background-color: var(--bg-main);
      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;
    }
    ul, ol {
      list-style: none;
    }
    button, input {
      font-family: inherit;
    }

    /* 通用容器与栅格 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section-wrap {
      padding: 90px 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: var(--bg-subtle);
    }
    .section-header {
      margin-bottom: 50px;
      text-align: center;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
      background: linear-gradient(135deg, #FFFFFF 60%, var(--primary-purple) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-dim);
      max-width: 820px;
      margin: 0 auto;
      line-height: 1.8;
    }

    /* 徽章与高亮元件 */
    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 0.82rem;
      font-weight: 600;
      background: rgba(108, 92, 231, 0.15);
      border: 1px solid var(--border-accent);
      color: #A29BFE;
      margin-bottom: 16px;
    }
    .badge-neon {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--neon-green);
      box-shadow: 0 0 8px var(--neon-green);
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 13px 28px;
      font-size: 0.98rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      outline: none;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--neon-green) 0%, #00D284 100%);
      color: #0B0D13;
      box-shadow: 0 4px 18px var(--neon-green-glow);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 255, 163, 0.45);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      border-color: var(--border-line);
      color: var(--text-main);
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.25);
      transform: translateY(-2px);
    }
    .btn-purple {
      background: linear-gradient(135deg, #7C5CFC 0%, var(--primary-purple) 100%);
      color: #FFFFFF;
      box-shadow: 0 4px 18px var(--primary-glow);
    }
    .btn-purple:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(108, 92, 231, 0.55);
    }

    /* 顶部双行导航系统 */
    .site-header {
      width: 100%;
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .top-sub-bar {
      background: #0B0D13;
      border-bottom: 1px solid var(--border-line);
      font-size: 0.78rem;
      color: var(--text-dim);
      padding: 6px 0;
    }
    .top-sub-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-indicator {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .top-sub-links {
      display: flex;
      gap: 20px;
    }
    .top-sub-links a:hover {
      color: var(--neon-green);
    }

    .main-nav-bar {
      background: rgba(15, 17, 23, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
      padding: 14px 0;
      transition: background 0.3s;
    }
    .main-nav-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.28rem;
      font-weight: 800;
      letter-spacing: -0.3px;
      color: #FFFFFF;
    }
    .nav-brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary-purple), var(--neon-green));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: #0F1117;
      font-size: 1.1rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
    }
    .nav-links a:hover {
      color: var(--neon-green);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #FFFFFF;
      font-size: 1.5rem;
      cursor: pointer;
    }

    /* 板块 1: Hero 对比选型与大厅看板 */
    .hero-section {
      padding: 70px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(108, 92, 231, 0.22) 0%, transparent 55%),
                  radial-gradient(circle at 10% 80%, rgba(0, 255, 163, 0.12) 0%, transparent 45%),
                  #0F1117;
      border-bottom: 1px solid var(--border-line);
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .hero-left h1 {
      font-size: 3rem;
      line-height: 1.2;
      font-weight: 900;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-left p.lead {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.85;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-metrics-strip {
      display: flex;
      gap: 32px;
      padding-top: 24px;
      border-top: 1px solid var(--border-line);
    }
    .hero-metric-item h4 {
      font-size: 1.5rem;
      color: var(--neon-green);
      font-weight: 800;
    }
    .hero-metric-item p {
      font-size: 0.8rem;
      color: var(--text-dim);
    }

    /* Hero 右侧对比选型卡组 */
    .tier-compare-deck {
      display: grid;
      grid-template-columns: 1fr;
      gap: 16px;
    }
    .tier-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      transition: all 0.3s;
    }
    .tier-card.featured-card {
      background: linear-gradient(145deg, #1A1C29 0%, #201E3C 100%);
      border: 2px solid var(--primary-purple);
      box-shadow: 0 10px 30px rgba(108, 92, 231, 0.25);
    }
    .tier-card-tag {
      position: absolute;
      top: 16px;
      right: 18px;
      background: var(--neon-green);
      color: #0B0D13;
      font-size: 0.72rem;
      font-weight: 800;
      padding: 3px 8px;
      border-radius: 4px;
      text-transform: uppercase;
    }
    .tier-card h3 {
      font-size: 1.25rem;
      margin-bottom: 8px;
    }
    .tier-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .tier-features {
      font-size: 0.82rem;
      color: var(--text-dim);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      margin-bottom: 18px;
    }
    .tier-features li {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块 2: 组队痛点卡片对比 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .pain-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      border: 1px solid rgba(255, 71, 87, 0.15);
      position: relative;
    }
    .pain-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 20px;
      right: 20px;
      height: 2px;
      background: linear-gradient(90deg, #FF4757, transparent);
    }
    .pain-index {
      font-size: 1.5rem;
      font-weight: 900;
      color: rgba(255, 71, 87, 0.5);
      margin-bottom: 12px;
    }
    .pain-card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
    }
    .pain-card p {
      font-size: 0.88rem;
      color: var(--text-dim);
      line-height: 1.7;
    }

    /* 板块 3: 全链路产品解决架构 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .arch-preview {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-line);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
    }
    .arch-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .arch-item {
      display: flex;
      gap: 16px;
      background: var(--bg-card);
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-line);
    }
    .arch-icon-box {
      flex-shrink: 0;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(108, 92, 231, 0.15);
      color: #A29BFE;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }
    .arch-content h4 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }
    .arch-content p {
      font-size: 0.88rem;
      color: var(--text-dim);
    }

    /* 板块 4: 六大功能矩阵 (3x2 网格) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-box {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      transition: all 0.3s ease;
    }
    .feature-box:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-accent);
      transform: translateY(-4px);
    }
    .feature-badge {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(0, 255, 163, 0.1);
      border: 1px solid rgba(0, 255, 163, 0.25);
      color: var(--neon-green);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: bold;
      margin-bottom: 20px;
    }
    .feature-box h3 {
      font-size: 1.18rem;
      margin-bottom: 10px;
    }
    .feature-box p {
      font-size: 0.88rem;
      color: var(--text-dim);
      line-height: 1.7;
    }

    /* 板块 5: 热门圈子大厅 (3 列纵向展示大卡) */
    .lobby-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .lobby-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-line);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .lobby-img-wrap {
      height: 190px;
      overflow: hidden;
      position: relative;
    }
    .lobby-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .lobby-card:hover .lobby-img-wrap img {
      transform: scale(1.06);
    }
    .lobby-active-tag {
      position: absolute;
      bottom: 12px;
      left: 12px;
      background: rgba(15, 17, 23, 0.8);
      backdrop-filter: blur(8px);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.76rem;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .lobby-info {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .lobby-info h3 {
      font-size: 1.25rem;
      margin-bottom: 10px;
    }
    .lobby-info p {
      font-size: 0.88rem;
      color: var(--text-dim);
      margin-bottom: 18px;
    }

    /* 板块 6: 底层技术与降噪理念 */
    .tech-pillar-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 30px;
    }
    .tech-pillar-card {
      background: #11131B;
      border: 1px solid rgba(108, 92, 231, 0.2);
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: left;
    }
    .tech-stat-val {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary-purple);
      margin-bottom: 8px;
    }
    .tech-pillar-card h3 {
      font-size: 1.12rem;
      margin-bottom: 8px;
    }
    .tech-pillar-card p {
      font-size: 0.86rem;
      color: var(--text-dim);
    }

    /* 板块 7: 战队故事与公会入驻 */
    .story-card-wrap {
      background: linear-gradient(135deg, #181B26 0%, #1E1A33 100%);
      border: 1px solid var(--border-accent);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
    }
    .story-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-content {
      padding: 44px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .story-content blockquote {
      font-size: 1.15rem;
      font-weight: 500;
      color: #FFFFFF;
      line-height: 1.85;
      margin-bottom: 24px;
    }
    .story-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .story-author-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }
    .story-author-meta h4 {
      font-size: 1rem;
    }
    .story-author-meta span {
      font-size: 0.8rem;
      color: var(--text-dim);
    }

    /* 板块 8: 全网运行指标条 */
    .live-stats-bar {
      background: linear-gradient(90deg, #181B26 0%, #212538 50%, #181B26 100%);
      border-top: 1px solid var(--border-line);
      border-bottom: 1px solid var(--border-line);
      padding: 48px 0;
    }
    .stats-flex {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-box h2 {
      font-size: 2.8rem;
      font-weight: 900;
      background: linear-gradient(135deg, #FFFFFF 30%, var(--neon-green) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }
    .stat-box p {
      font-size: 0.9rem;
      color: var(--text-dim);
    }

    /* 板块 9: 玩家反馈评价墙 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }
    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #2D3248;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--neon-green);
    }
    .review-user h4 {
      font-size: 0.98rem;
    }
    .review-user span {
      font-size: 0.75rem;
      color: var(--text-dim);
    }
    .review-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 10: 资讯与生态前瞻 */
    .news-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 28px;
    }
    .news-featured {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-line);
      display: flex;
      flex-direction: column;
    }
    .news-featured-img {
      height: 230px;
    }
    .news-featured-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-featured-body {
      padding: 24px;
    }
    .news-featured-body h3 {
      font-size: 1.3rem;
      margin-bottom: 12px;
    }
    .news-featured-body p {
      font-size: 0.88rem;
      color: var(--text-dim);
    }
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .news-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 18px 20px;
      transition: border-color 0.25s ease;
    }
    .news-item:hover {
      border-color: var(--primary-purple);
    }
    .news-meta-date {
      font-size: 0.78rem;
      color: var(--neon-green);
      margin-bottom: 6px;
    }
    .news-item h4 {
      font-size: 1.02rem;
      margin-bottom: 6px;
    }
    .news-item p {
      font-size: 0.84rem;
      color: var(--text-dim);
      line-height: 1.6;
    }

    /* 板块 11: 开黑疑惑常见问题 (手风琴) */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: transparent;
      border: none;
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-arrow {
      transition: transform 0.3s ease;
      font-size: 0.9rem;
      color: var(--text-dim);
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
      color: var(--neon-green);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 板块 12: 底部行动号召 CTA */
    .cta-banner-wrap {
      background: linear-gradient(135deg, rgba(108, 92, 231, 0.25) 0%, rgba(0, 255, 163, 0.15) 100%), #141722;
      border: 1px solid rgba(108, 92, 231, 0.4);
      border-radius: var(--radius-lg);
      padding: 64px 36px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-banner-wrap h2 {
      font-size: 2.3rem;
      font-weight: 900;
      margin-bottom: 16px;
    }
    .cta-banner-wrap p {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 32px;
    }
    .cta-platforms {
      display: flex;
      justify-content: center;
      gap: 24px;
      font-size: 0.85rem;
      color: var(--text-dim);
      margin-top: 24px;
    }

    /* 统一规范页脚 */
    .site-footer {
      background: #0B0D13;
      border-top: 1px solid var(--border-line);
      padding: 70px 0 30px;
      font-size: 0.88rem;
      color: var(--text-dim);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      font-size: 1.02rem;
      color: #FFFFFF;
      margin-bottom: 20px;
      font-weight: 700;
    }
    .footer-col p {
      line-height: 1.8;
      margin-bottom: 16px;
    }
    .footer-links-list li {
      margin-bottom: 12px;
    }
    .footer-links-list a:hover {
      color: var(--neon-green);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-line);
      padding-top: 24px;
      text-align: center;
      font-size: 0.8rem;
    }
    .footer-bottom a {
      color: var(--text-dim);
    }
    .footer-bottom a:hover {
      color: var(--text-main);
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .pain-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .arch-grid {
        grid-template-columns: 1fr;
      }
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .lobby-grid {
        grid-template-columns: 1fr;
      }
      .story-card-wrap {
        grid-template-columns: 1fr;
      }
      .stats-flex {
        grid-template-columns: repeat(2, 1fr);
      }
      .news-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .pain-grid {
        grid-template-columns: 1fr;
      }
      .features-grid {
        grid-template-columns: 1fr;
      }
      .tech-pillar-grid {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-left h1 {
        font-size: 2.2rem;
      }
      .section-wrap {
        padding: 56px 0;
      }
      .top-sub-bar {
        display: none;
      }
    }