/* roulang page: index */
:root {
      --primary-blue: #1A56DB;
      --primary-dark: #0F172A;
      --accent-cyan: #0D9488;
      --accent-orange: #F97316;
      --bg-light: #F8FAFC;
      --card-border: #E2E8F0;
      --text-muted: #64748B;
      --text-dark: #1E293B;
      --border-radius-base: 14px;
      --card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --card-shadow-hover: 0 20px 30px -8px rgba(26, 86, 219, 0.15), 0 12px 16px -6px rgba(15, 23, 42, 0.06);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

    /* 顶部首行导航与Tabs */
    .top-navbar {
      background: #FFFFFF;
      border-bottom: 1px solid var(--card-border);
      padding: 0.85rem 0;
    }
    .brand-logo-text {
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--primary-blue);
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      letter-spacing: -0.5px;
    }
    .search-nav-box {
      background: #F1F5F9;
      border-radius: 30px;
      padding: 0.35rem 1rem;
      border: 1px solid transparent;
      transition: all 0.3s;
    }
    .search-nav-box:focus-within {
      background: #FFFFFF;
      border-color: var(--primary-blue);
      box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.12);
    }
    .search-nav-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 0.9rem;
      width: 200px;
    }
    
    .channel-tabs-bar {
      background: #FFFFFF;
      border-bottom: 1px solid var(--card-border);
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
      z-index: 1020;
    }
    .channel-pills-wrapper {
      display: flex;
      gap: 0.5rem;
      padding: 0.65rem 0;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
    }
    .channel-pills-wrapper::-webkit-scrollbar {
      display: none;
    }
    .pill-nav-item {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.45rem 1.15rem;
      border-radius: 30px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-dark);
      background: #F1F5F9;
      transition: all 0.2s ease;
    }
    .pill-nav-item:hover, .pill-nav-item.active {
      background: var(--primary-blue);
      color: #FFFFFF;
    }

    /* 通用组件与视觉 */
    .section-py {
      padding-top: 5.5rem;
      padding-bottom: 5.5rem;
    }
    .section-header {
      margin-bottom: 3.5rem;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0.6rem auto 0;
    }
    .tag-badge {
      display: inline-block;
      padding: 0.25rem 0.8rem;
      font-size: 0.8rem;
      font-weight: 600;
      border-radius: 20px;
      background: rgba(26, 86, 219, 0.08);
      color: var(--primary-blue);
      margin-bottom: 0.75rem;
    }
    .btn-brand-primary {
      background-color: var(--primary-blue);
      color: #FFFFFF;
      padding: 0.7rem 1.75rem;
      border-radius: 10px;
      font-weight: 600;
      border: 1px solid var(--primary-blue);
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      min-height: 46px;
    }
    .btn-brand-primary:hover {
      background-color: #1442B0;
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 8px 16px rgba(26, 86, 219, 0.25);
    }
    .btn-brand-outline {
      background: transparent;
      color: var(--primary-blue);
      padding: 0.7rem 1.75rem;
      border-radius: 10px;
      font-weight: 600;
      border: 1px solid #CBD5E1;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      min-height: 46px;
    }
    .btn-brand-outline:hover {
      background: #F8FAFC;
      border-color: var(--primary-blue);
      color: var(--primary-blue);
      transform: translateY(-2px);
    }
    .app-card {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: var(--border-radius-base);
      box-shadow: var(--card-shadow);
      transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    }
    .app-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: #BFDBFE;
    }

    /* 板块一：产品舞台居中 Hero */
    .hero-stage-section {
      background: linear-gradient(180deg, #F0F4FF 0%, #FFFFFF 100%);
      padding: 4.5rem 0 5rem;
      position: relative;
      overflow: hidden;
    }
    .hero-content-intro {
      max-width: 820px;
      margin: 0 auto 2.5rem;
      text-align: center;
    }
    .hero-title-main {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--primary-dark);
      line-height: 1.25;
      margin-bottom: 1.25rem;
    }
    .hero-stage-preview {
      position: relative;
      background: #FFFFFF;
      padding: 1.25rem;
      border-radius: 20px;
      box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.15);
      border: 1px solid rgba(226, 232, 240, 0.8);
      max-width: 960px;
      margin: 0 auto;
    }
    .hero-stage-preview img {
      width: 100%;
      height: 440px;
      object-fit: cover;
      border-radius: 14px;
    }
    .hero-floating-stat {
      position: absolute;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border: 1px solid #E2E8F0;
      border-radius: 12px;
      padding: 0.85rem 1.25rem;
      box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
      display: flex;
      align-items: center;
      gap: 0.85rem;
    }
    .stat-pos-left {
      bottom: -20px;
      left: 30px;
    }
    .stat-pos-right {
      top: 30px;
      right: -20px;
    }

    /* 样式微调：深色区块与时间线 */
    .bg-slate-dark {
      background-color: var(--primary-dark);
      color: #FFFFFF;
    }
    .timeline-dot-step {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: rgba(26, 86, 219, 0.1);
      color: var(--primary-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    
    /* 底部固定条 */
    .floating-cta-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(255, 255, 255, 0.98);
      box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
      border-top: 1px solid var(--card-border);
      z-index: 1030;
      padding: 0.75rem 0;
    }

    @media (max-width: 991px) {
      .hero-title-main { font-size: 2.15rem; }
      .hero-stage-preview img { height: 280px; }
      .stat-pos-left, .stat-pos-right { position: static; margin-top: 1rem; width: 100%; }
      .section-py { padding-top: 3.5rem; padding-bottom: 3.5rem; }
      .section-title { font-size: 1.75rem; }
    }