/* roulang page: index */
:root {
      --sp-primary: #0F52BA;
      --sp-primary-hover: #0c4399;
      --sp-accent: #FF5E14;
      --sp-accent-hover: #e04f0d;
      --sp-bg-light: #F8FAFC;
      --sp-bg-dark: #0A1128;
      --sp-card-dark: #131E3D;
      --sp-text-main: #0F172A;
      --sp-text-muted: #334155;
      --sp-text-sub: #64748B;
      --sp-border: #E2E8F0;
      --sp-border-dark: #22325E;
      --sidebar-width: 260px;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
    }

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--sp-bg-light);
      color: var(--sp-text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

    /* 桌面端 App Shell 侧边栏 */
    .app-sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: var(--sidebar-width);
      height: 100vh;
      background: #FFFFFF;
      border-right: 1px solid var(--sp-border);
      z-index: 1040;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 1.5rem 1rem;
    }

    .brand-logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      padding-bottom: 1.5rem;
      border-bottom: 1px solid var(--sp-border);
    }
    .brand-icon {
      width: 38px;
      height: 38px;
      background: var(--sp-primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-size: 1.25rem;
      font-weight: bold;
    }
    .brand-text {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--sp-text-main);
      letter-spacing: -0.3px;
    }

    .sidebar-nav {
      flex: 1;
      overflow-y: auto;
      padding: 1rem 0;
    }
    .sidebar-nav .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 0.75rem 1rem;
      color: var(--sp-text-muted);
      font-size: 0.95rem;
      font-weight: 500;
      border-radius: var(--radius-sm);
      margin-bottom: 4px;
    }
    .sidebar-nav .nav-link:hover,
    .sidebar-nav .nav-link.active {
      background-color: #EEF4FF;
      color: var(--sp-primary);
      font-weight: 600;
    }
    .sidebar-nav .nav-link i {
      font-size: 1.1rem;
    }

    .sidebar-footer-card {
      background: #F1F5F9;
      padding: 1rem;
      border-radius: var(--radius-md);
      font-size: 0.82rem;
      color: var(--sp-text-sub);
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.75rem;
      color: #10B981;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); opacity: 0.8; }
      50% { transform: scale(1.2); opacity: 1; }
      100% { transform: scale(0.95); opacity: 0.8; }
    }

    /* 右侧主工作区 */
    .app-main {
      margin-left: var(--sidebar-width);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* 移动端顶栏 */
    .mobile-header {
      display: none;
      height: 64px;
      background: #FFFFFF;
      border-bottom: 1px solid var(--sp-border);
      position: sticky;
      top: 0;
      z-index: 1030;
      padding: 0 1.25rem;
      align-items: center;
      justify-content: space-between;
    }

    /* 通用版块规范 */
    .sp-section {
      padding: 5rem 2rem;
      position: relative;
    }
    .sp-section.bg-white { background: #FFFFFF; }
    .sp-section.bg-light { background: var(--sp-bg-light); }
    .sp-section.bg-dark { background: var(--sp-bg-dark); color: #F8FAFC; }

    .section-title-wrap {
      margin-bottom: 3rem;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: #EEF4FF;
      color: var(--sp-primary);
      font-size: 0.82rem;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .sp-section.bg-dark .section-badge {
      background: rgba(255, 94, 20, 0.15);
      color: #FF854D;
    }
    .section-main-title {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 0.75rem;
      color: var(--sp-text-main);
    }
    .sp-section.bg-dark .section-main-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--sp-text-muted);
      max-width: 780px;
      margin: 0 auto;
    }
    .sp-section.bg-dark .section-desc {
      color: #94A3B8;
    }

    /* 自定义按钮体系 */
    .btn-sp-primary {
      background-color: var(--sp-primary);
      color: #FFFFFF;
      font-weight: 600;
      padding: 0.75rem 1.75rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--sp-primary);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-sp-primary:hover {
      background-color: var(--sp-primary-hover);
      border-color: var(--sp-primary-hover);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(15, 82, 186, 0.25);
    }
    .btn-sp-accent {
      background-color: var(--sp-accent);
      color: #FFFFFF;
      font-weight: 600;
      padding: 0.75rem 1.75rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--sp-accent);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-sp-accent:hover {
      background-color: var(--sp-accent-hover);
      border-color: var(--sp-accent-hover);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(255, 94, 20, 0.25);
    }
    .btn-sp-outline {
      background: transparent;
      color: var(--sp-primary);
      font-weight: 600;
      padding: 0.75rem 1.75rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--sp-primary);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-sp-outline:hover {
      background: #EEF4FF;
      color: var(--sp-primary-hover);
    }
    .btn-sp-outline-light {
      background: transparent;
      color: #FFFFFF;
      font-weight: 600;
      padding: 0.75rem 1.75rem;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.3);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-sp-outline-light:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
      color: #FFFFFF;
    }

    /* 样式卡片通用 */
    .sp-card {
      background: #FFFFFF;
      border: 1px solid var(--sp-border);
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05), 0 10px 15px -5px rgba(15, 23, 42, 0.04);
      transition: all 0.3s ease;
      height: 100%;
      position: relative;
    }
    .sp-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      border-color: #CBD5E1;
    }

    /* Section 1: Hero Carousel */
    .hero-carousel-item {
      position: relative;
      min-height: 540px;
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      align-items: center;
      background-size: cover;
      background-position: center;
      padding: 4rem;
    }
    .hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(90deg, rgba(10, 17, 40, 0.95) 0%, rgba(10, 17, 40, 0.78) 55%, rgba(10, 17, 40, 0.45) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 680px;
      color: #FFFFFF;
    }
    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.22;
      margin-bottom: 1.25rem;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: #CBD5E1;
      margin-bottom: 2rem;
      line-height: 1.7;
    }

    /* Section 3: 核心功能卡片微条 */
    .feature-card {
      border-top: 4px solid var(--sp-primary);
    }
    .feature-card-num {
      position: absolute;
      top: 1rem;
      right: 1.25rem;
      font-size: 1.5rem;
      font-weight: 800;
      color: #E2E8F0;
    }
    .feature-icon-box {
      width: 52px;
      height: 52px;
      background: #EEF4FF;
      color: var(--sp-primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 1.25rem;
    }

    /* Section 4: 推荐卡片凸起 */
    .pricing-featured {
      border: 2px solid var(--sp-accent) !important;
      transform: scale(1.03);
      box-shadow: 0 20px 25px -5px rgba(255, 94, 20, 0.15);
    }
    .featured-ribbon {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--sp-accent);
      color: #FFFFFF;
      padding: 3px 14px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.5px;
    }

    /* Section 6: Mockup 演示 */
    .mockup-window {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.15);
      border: 1px solid var(--sp-border);
      overflow: hidden;
    }
    .mockup-header {
      background: #F1F5F9;
      padding: 10px 16px;
      border-bottom: 1px solid var(--sp-border);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .mockup-circle {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    /* Section 9: 统计指标 */
    .counter-val {
      font-size: 2.85rem;
      font-weight: 800;
      color: var(--sp-primary);
      line-height: 1;
      margin-bottom: 0.5rem;
    }

    /* 页脚 */
    .app-footer {
      background: #060B1A;
      color: #94A3B8;
      padding: 4.5rem 2rem 2rem 2rem;
      border-top: 1px solid #1E293B;
      font-size: 0.9rem;
    }
    .app-footer h5 {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .app-footer ul {
      list-style: none;
      padding: 0;
    }
    .app-footer ul li {
      margin-bottom: 0.65rem;
    }
    .app-footer ul li a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }
    .footer-bottom {
      margin-top: 3.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid #1E293B;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      font-size: 0.85rem;
    }

    /* 响应式断点 */
    @media (max-width: 991.98px) {
      .app-sidebar {
        display: none;
      }
      .app-main {
        margin-left: 0;
      }
      .mobile-header {
        display: flex;
      }
      .sp-section {
        padding: 3.5rem 1.25rem;
      }
      .hero-carousel-item {
        padding: 2.5rem 1.5rem;
        min-height: 480px;
      }
      .hero-title {
        font-size: 2rem;
      }
      .pricing-featured {
        transform: none;
      }
    }