:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #8b5cf6;
            --dark: #0f172a;
            --darker: #0b1120;
            --light: #f1f5f9;
            --gray: #64748b;
            --success: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
            --card-bg: #1e293b;
            --sidebar-width: 280px;
            --header-height: 70px;
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: var(--darker);
            color: var(--light);
            min-height: 100vh;
            overflow-x: hidden;
            
        }

        /* 头部导航 */
        header {
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(10px);
            height: var(--header-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 2rem;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(100, 116, 139, 0.2);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .logo h1 {
            font-size: 1.5rem;
            font-weight: 700;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .logo-icon {
            font-size: 2rem;
            color: var(--primary);
        }

        .search-bar {
            flex: 1;
            max-width: 600px;
            margin: 0 2rem;
            position: relative;
        }

        .search-bar input {
            width: 100%;
            padding: 0.8rem 1.5rem 0.8rem 3rem;
            border-radius: 50px;
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(100, 116, 139, 0.3);
            color: var(--light);
            font-size: 1rem;
            transition: var(--transition);
        }

        .search-bar input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
        }

        .search-bar i {
            position: absolute;
            left: 1.2rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray);
        }

        .user-actions {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        .btn {
            padding: 0.6rem 1.5rem;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            font-size: 1rem;
        }

        .btn-login {
            background: transparent;
            color: var(--light);
            border: 1px solid var(--gray);
        }

        .btn-login:hover {
            background: rgba(100, 116, 139, 0.2);
        }

        .btn-logout {
            background: transparent;
            color: var(--light);
            border: 1px solid var(--danger);
        }

        .btn-logout:hover {
            background: rgba(139, 100, 100, 0.2);
        }

        .btn-register {
            background: var(--primary);
            color: white;
        }

        .btn-register:hover {
            background: var(--primary-dark);
        }

        .user-profile {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            cursor: pointer;
        }

        .avatar {
            width: 40px;
            height: 40px;
            max-width: 100%;
            max-height: 100%;
            border-radius: 50%;
            background: linear-gradient(45deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: white;
        }

        /* 主体布局 */
        .main-container {
            display: flex;
            min-height: calc(100vh - var(--header-height));
            margin-top: var(--header-height);
        }

        /* 侧边栏 */
        .sidebar {
            width: var(--sidebar-width);
            background: var(--dark);
            padding: 1.5rem 0;
            height: calc(100vh - var(--header-height));
            position: fixed;
            overflow-y: auto;
            transition: var(--transition);
            border-right: 1px solid rgba(100, 116, 139, 0.2);
        }

        .sidebar-toggle {
            display: none;
            position: fixed;
            top: calc(var(--header-height) + 1rem);
            left: 1rem;
            z-index: 90;
            background: var(--primary);
            color: white;
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        .sidebar-header {
            padding: 0 1.5rem 1.5rem;
            border-bottom: 1px solid rgba(100, 116, 139, 0.2);
        }

        .sidebar-header h2 {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.25rem;
        }

        .category-list {
            list-style: none;
            padding: 1rem 0;
        }

        .category-item {
            padding: 0.75rem 1.5rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transition: var(--transition);
            border-left: 3px solid transparent;
        }

        .category-item:hover, .category-item.active {
            background: rgba(30, 41, 59, 0.5);
            border-left-color: var(--primary);
        }

        .category-item i {
            width: 24px;
            text-align: center;
        }

        .subcategories {
            list-style: none;
            padding-left: 2.5rem;
            margin-top: 0.5rem;
            display: none;
        }

        .subcategories.active {
            display: block;
        }

        .subcategory-item {
            padding: 0.5rem 0;
            cursor: pointer;
            color: var(--gray);
            transition: var(--transition);
        }

        .subcategory-item:hover, .subcategory-item.active {
            color: var(--primary);
        }

        /* 主内容区 */
        .content {
            flex: 1;
            padding: 2rem;
            margin-left: var(--sidebar-width);
            transition: var(--transition);
        }

        .page-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 2rem;
        }

        .page-title h2 {
            font-size: 1.75rem;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .filter-options {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .filter-btn {
            padding: 0.5rem 1.25rem;
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(100, 116, 139, 0.3);
            border-radius: 50px;
            color: var(--light);
            cursor: pointer;
            transition: var(--transition);
        }

        .filter-btn.active, .filter-btn:hover {
            background: var(--primary);
            border-color: var(--primary);
        }

        /* API卡片网格 */
        .api-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .api-card {
            background: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(100, 116, 139, 0.2);
        }

        .api-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
            border-color: var(--primary);
        }

        .card-header {
            padding: 1.25rem;
            border-bottom: 1px solid rgba(100, 116, 139, 0.2);
        }

        .api-category {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: rgba(37, 99, 235, 0.2);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        .api-name {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .api-description {
            color: var(--gray);
            font-size: 0.9rem;
            line-height: 1.5;
        }

        .card-body {
            padding: 1.25rem;
        }

        .api-meta {
            display: flex;
            justify-content: space-between;
            margin-bottom: 1rem;
        }

        .meta-item {
            display: flex;
            flex-direction: column;
        }

        .meta-label {
            font-size: 0.75rem;
            color: var(--gray);
            margin-bottom: 0.25rem;
        }

        .meta-value {
            font-weight: 600;
        }

        .pricing {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--success);
            margin-bottom: 1rem;
        }

        .pricing span {
            font-size: 0.9rem;
            color: var(--gray);
            font-weight: normal;
        }

        .card-footer {
            padding: 1.25rem;
            border-top: 1px solid rgba(100, 116, 139, 0.2);
            display: flex;
            
            justify-content: center;/*space-between*/
        }

        .btn-details {
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            text-decoration: none;
            display: inline-block;
        }

        .btn-details:hover {
            background: var(--primary);
            color: white;
        }

        .btn-buy {
            background: var(--success);
            color: white;
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn-buy:hover {
            background: #0da271;
        }

        /* 用户中心样式 */
        .dashboard {
            display: none;
            padding: 2rem;
        }

        .balance-card {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }

        .balance-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .balance-header h3 {
            font-size: 1.5rem;
        }

        .balance-amount {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }

        .balance-actions {
            display: flex;
            gap: 1rem;
        }

        .btn-recharge {
            background: white;
            color: var(--primary);
            padding: 0.75rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-recharge:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }

        .btn-withdraw {
            background: transparent;
            color: white;
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 0.75rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-withdraw:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .stat-card {
            background: var(--card-bg);
            border-radius: 12px;
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
        }

        .stat-title {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
            color: var(--gray);
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .stat-trend {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            color: var(--success);
            font-weight: 600;
        }

        .chart-container {
            background: var(--card-bg);
            border-radius: 12px;
            padding: 1.5rem 1.5rem 4rem 1.5rem;
            margin-bottom: 2rem;
            height: 450px;
        }

        .chart-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .chart-header h3 {
            font-size: 1.25rem;
        }

        .chart-actions {
            display: flex;
            gap: 0.5rem;
        }

        .chart-btn {
            padding: 0.5rem 1rem;
            background: rgba(30, 41, 59, 0.5);
            border: 1px solid rgba(100, 116, 139, 0.3);
            border-radius: 50px;
            color: var(--light);
            cursor: pointer;
        }

        .chart-btn.active {
            background: var(--primary);
            border-color: var(--primary);
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.active {
                transform: translateX(0);
            }
            .content {
                margin-left: 0;
            }
            .sidebar-toggle {
                display: flex;
            }
            .api-grid {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .search-bar {
                display: none;
            }
            .header-actions {
                display: none;
            }
            .api-grid {
                grid-template-columns: 1fr;
            }
        }

        .api-breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--gray);
            margin-bottom: 1rem;
            font-size: 0.9rem;
        }
        
        .api-breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        
        .api-breadcrumb a:hover {
            text-decoration: underline;
        }



        .loading-indicator {
            text-align: center;
            padding: 20px;
            grid-column: 1 / -1;
            color: #666;
        }
        
        .no-apis, .error-message {
            text-align: center; 
            grid-column: 1 / -1;
            padding: 20px;
            color: #ff4757;
        }
        



#loading-indicator .fa-spinner {
    margin-bottom: 15px;
    font-size: 3em;
    color: #3498db;
}

/* 标签页样式 */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 相关API卡片悬停效果 */
.api-details-card {
    transition: transform 0.3s, box-shadow 0.3s;
}

.api-details-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}


  
  .dots {
    display: inline-flex;
    margin-left: 4px;
    height: 18px;
    align-items: center;
  }
  
  .dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #f0f0f0;
    margin-right: 3px;
    opacity: 0;
  }
  
  .dot-1 {
    animation: dot-animation 1.5s infinite ease-in-out;
  }
  
  .dot-2 {
    animation: dot-animation 1.5s infinite ease-in-out 0.3s;
  }
  
  .dot-3 {
    animation: dot-animation 1.5s infinite ease-in-out 0.6s;
    margin-right: 0;
  }
  
  @keyframes dot-animation {
    0% {
      opacity: 0;
      transform: translateY(0);
    }
    25% {
      opacity: 1;
      transform: translateY(-5px);
    }
    50% {
      opacity: 1;
      transform: translateY(0);
    }
    75% {
      opacity: 1;
      transform: translateY(0);
    }
    100% {
      opacity: 0;
      transform: translateY(0);
    }
  }
  /* 替换原来的dot-animation */
@keyframes dot-animation2 {
    0%, 100% {
      opacity: 0.2;
      transform: scale(0.8);
    }
    50% {
      opacity: 1;
      transform: scale(1.1);
    }
  }