:root {
    --primary-color: #1a73e8;
    --secondary-color: #34a853;
    --warning-color: #fbbc05;
    --error-color: #ea4335;
    --bg-color: #f8f9fa;
    --card-color: #ffffff;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --border-color: #dadce0;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --radius: 12px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
.header {
    background: var(--card-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    overflow: hidden;
}

.header-content {
    padding: 24px;
}

.header h1 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 2rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-controls {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 250px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

#searchInput {
    width: 100%;
    padding: 12px 16px 12px 48px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: var(--bg-color);
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.category-filter {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    background: var(--card-color);
    color: var(--text-primary);
    min-width: 120px;
}

.refresh-btn {
    padding: 12px 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.refresh-btn:hover {
    background: #1557b7;
    transform: translateY(-2px);
}

/* 统计栏 */
.stats-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    color: var(--text-secondary);
    font-size: 14px;
}

/* 加载状态 */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.loading i {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--primary-color);
}

.app-store {
    background: #ffffff; /* 浅色背景 */
    color: #333333; /* 深色文字 */
    font-size: 14px; /* 增大字体 */
}


/* 应用网格 */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.app-card {
    background: var(--card-color);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.app-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.app-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    margin-bottom: 16px;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.app-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.app-company {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 12px;
}

.app-category {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.app-time {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 12px;
}

/* 错误消息 */
.error-message {
    background: rgba(234, 67, 53, 0.1);
    border: 1px solid var(--error-color);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 20px 0;
}

.error-message i {
    color: var(--error-color);
    font-size: 20px;
    margin-top: 2px;
}

.error-message h3 {
    color: var(--error-color);
    margin-bottom: 8px;
}

.hidden {
    display: none;
}

/* 无数据状态 */
.no-data {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.no-data i {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--border-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 12px;
    }
    
    .header-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        min-width: auto;
    }
    
    .app-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-bar {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
}

/* 页脚 */
.footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

.cache-info {
    font-size: 12px;
    opacity: 0.7;
    margin-top: 8px;

}