/* 全局样式 */
body, html {
    height: 100%;
    width: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f0f4f8;
    font-family: Arial, sans-serif;
    color: #333;
}

#main-container {
    width: 95%;
    max-width: 1200px;
    margin-top: 20px;
    text-align: center;
}

h1 {
    font-size: 32px;
    color: #0077b6;
    font-weight: bold;
    margin-bottom: 20px;
}

/* 时间选择框 */
#select-box {
    margin-bottom: 30px;
}

label {
    font-weight: bold;
    font-size: 18px;
    margin-right: 10px;
}

select {
    padding: 8px 12px;
    font-size: 16px;
    border: 1px solid #0077b6;
    border-radius: 5px;
    background-color: #fff;
    color: #333;
    cursor: pointer;
}

/* 图表容器 */
.chart-container {
    width: 100%;
    height: 400px;
    margin-bottom: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    background-color: #fff;
}