/* roulang page: index */
:root {
      --primary: #6C38FF;
      --primary-dark: #4D1CE3;
      --accent: #00F2FE;
      --accent-green: #00E599;
      --bg-body: #F8FAFC;
      --bg-dark: #0D1117;
      --bg-dark-card: #161B22;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #F1F5F9;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 18px rgba(108, 56, 255, 0.07);
      --shadow-lg: 0 16px 36px -6px rgba(15, 23, 42, 0.12);
    }

    body {
      font-family: system-ui, -apple-system, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.75;
      letter-spacing: 0.02em;
      overflow-x: hidden;
    }

    /* 顶部悬浮双层导航条 */
    .top-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      padding: 12px 24px;
      transition: all 0.3s ease;
    }
    .top-utility-bar {
      background: rgba(13, 17, 23, 0.88);
      backdrop-filter: blur(8px);
      border-radius: 10px;
      color: #94A3B8;
      font-size: 0.82rem;
      padding: 6px 18px;
      margin-bottom: 8px;
    }
    .main-nav-card {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-radius: 16px;
      box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
      border: 1px solid rgba(226, 232, 240, 0.8);
      padding: 10px 24px;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      text-decoration: none;
      letter-spacing: -0.01em;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo:hover {
      color: var(--primary-dark);
    }
    .nav-link {
      color: #334155;
      font-weight: 600;
      font-size: 0.92rem;
      padding: 8px 14px !important;
      transition: all 0.2s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .btn-gradient {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: #fff;
      font-weight: 600;
      border: none;
      border-radius: 999px;
      padding: 9px 24px;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px rgba(108, 56, 255, 0.3);
    }
    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(108, 56, 255, 0.45);
      color: #fff;
    }
    .btn-outline-custom {
      border: 1.5px solid #CBD5E1;
      border-radius: 999px;
      font-weight: 600;
      color: #334155;
      padding: 8px 22px;
      background: #fff;
      transition: all 0.25s ease;
    }
    .btn-outline-custom:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #F8FAFC;
    }

    /* 通用板块外框与装饰 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-badge {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--primary);
      background: rgba(108, 56, 255, 0.08);
      border: 1px solid rgba(108, 56, 255, 0.2);
      border-radius: 999px;
      padding: 4px 14px;
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.35;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1rem;
      max-width: 680px;
      margin-bottom: 40px;
    }

    /* Hero 板块 */
    .hero-section {
      padding: 40px 0 70px;
      background: radial-gradient(circle at 10% 20%, rgba(108, 56, 255, 0.06) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(0, 242, 254, 0.05) 0%, transparent 40%);
    }
    .hero-carousel {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(226, 232, 240, 0.9);
    }
    .carousel-item {
      min-height: 520px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .carousel-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(13, 17, 23, 0.92) 0%, rgba(13, 17, 23, 0.75) 60%, rgba(13, 17, 23, 0.35) 100%);
      display: flex;
      align-items: center;
      padding: 40px 60px;
    }
    .hero-badge-check {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #fff;
      padding: 6px 14px;
      border-radius: 8px;
      font-size: 0.85rem;
      margin-right: 8px;
      margin-bottom: 8px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 通用卡片与悬停状态 */
    .app-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid #E2E8F0;
      padding: 28px;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      height: 100%;
    }
    .app-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .card-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(108, 56, 255, 0.1);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
    }

    /* 深色电竞专区 */
    .dark-concept-section {
      background-color: var(--bg-dark);
      color: var(--text-light);
    }
    .dark-concept-section .section-title {
      color: #FFFFFF;
    }
    .dark-concept-section .section-desc {
      color: #94A3B8;
    }
    .dark-card {
      background-color: var(--bg-dark-card);
      border: 1px solid #30363D;
      border-radius: var(--radius-md);
      padding: 30px;
      color: #CBD5E1;
      height: 100%;
      transition: all 0.25s ease;
    }
    .dark-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }

    /* 流程步骤 */
    .workflow-step {
      position: relative;
      padding: 24px;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid #E2E8F0;
      text-align: center;
    }
    .step-number {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFF;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    /* 统计数据条 */
    .stat-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    /* 手风琴面板 */
    .accordion-button:not(.collapsed) {
      color: var(--primary);
      background-color: rgba(108, 56, 255, 0.05);
      box-shadow: none;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: rgba(108, 56, 255, 0.2);
    }
    .accordion-item {
      border: 1px solid #E2E8F0;
      border-radius: 12px !important;
      overflow: hidden;
      margin-bottom: 12px;
    }

    /* 底部CTA通栏 */
    .bottom-cta-banner {
      background: linear-gradient(135deg, #1E1B4B 0%, #311075 50%, #0F172A 100%);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      color: #FFF;
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* 页脚 */
    footer {
      background: #0B0E14;
      color: #94A3B8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
    }
    footer a {
      color: #CBD5E1;
      text-decoration: none;
      transition: color 0.2s ease;
    }
    footer a:hover {
      color: var(--accent);
    }

    @media (max-width: 991.98px) {
      .top-header {
        padding: 8px 12px;
      }
      .carousel-overlay {
        padding: 30px 20px;
      }
      .section-title {
        font-size: 1.75rem;
      }
    }