/* 通用样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 页眉样式 */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 主内容区域 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* 搜索容器 */
.search-container {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
}

.search-container input {
    flex: 1;
    padding: 0.8rem 1rem;
    font-size: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 4px;
    transition: border-color 0.3s;
}

.search-container input:focus {
    outline: none;
    border-color: #667eea;
}

.search-container button {
    padding: 0.8rem 2rem;
    background-color: #667eea;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.search-container button:hover {
    background-color: #5a6fd8;
}

/* 页脚样式 */
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 3rem;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .search-container {
        flex-direction: column;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 0 1rem;
    }
}

/* 按钮通用样式 */
.btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background-color: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s, transform 0.2s;
    font-weight: 500;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #5a6fd8;
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

/* 卡片通用样式 */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 1.5rem;
    transition: box-shadow 0.3s, transform 0.2s;
}

.card:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}