/* 全局样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    padding: 20px;
}

header {
    background-color: #1a73e8;
    color: white;
    padding: 30px 20px;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    color: #666;
    border-top: 1px solid #eee;
}

h1, h2, h3 {
    margin-bottom: 15px;
}

/* 主页卡片样式 */
.card-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}

.card {
    background: white;
    border-radius: 8px;
    padding: 25px;
    width: 340px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn {
    display: inline-block;
    background-color: #1a73e8;
    color: white;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    margin-top: 15px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #1557b0;
}

/* 内容页面样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navigation {
    margin-bottom: 30px;
}

.navigation a {
    color: #1a73e8;
    text-decoration: none;
}

.section {
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.interactive-area {
    background-color: #f0f5ff;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

/* 交互元素样式 */
.tabs {
    display: flex;
    border-bottom: 1px solid #ddd;
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    border: 1px solid transparent;
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    background-color: #f8f9fa;
    margin-right: 5px;
}

.tab.active {
    background-color: white;
    border-color: #ddd;
    border-bottom-color: white;
    margin-bottom: -1px;
}

.tab-content {
    display: none;
    padding: 20px;
    background-color: white;
    border-radius: 0 0 4px 4px;
}

.tab-content.active {
    display: block;
}

.visualization {
    width: 100%;
    min-height: 300px;
    margin: 20px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .card-container {
        flex-direction: column;
        align-items: center;
    }
    
    .card {
        width: 100%;
        max-width: 500px;
    }
}