/* 全局样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6;
    color: #333;
    line-height: 1.6;
}

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

/* 头部样式 */
header {
    background-color: #ffffff;
    padding: 40px 20px;
    text-align: center;
    border-bottom: 1px solid #e0e0e0;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
    color: #2c3e50;
}

header p {
    margin-top: 10px;
    color: #7f8c8d;
    font-size: 1.1em;
}

/* 卡片网格布局 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    padding: 40px 0;
}

/* 卡片样式 */
.card {
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 25px;
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.card h2 {
    margin-top: 0;
    font-size: 1.5em;
    color: #3498db;
}

.card p {
    color: #555;
    margin-bottom: 20px;
}

/* 按钮样式 */
.button {
    display: inline-block;
    background-color: #3498db;
    color: #ffffff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.2s;
}

.button:hover {
    background-color: #2980b9;
}

/* 尾部样式 */
footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    background-color: #ffffff;
    border-top: 1px solid #e0e0e0;
    color: #7f8c8d;
}