header{
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.56);
    padding: 15px 0;
    color: #2e2e2e;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
    border-radius: 0px 0px 10px 10px;
    position: fixed;
    width: 100%;
    z-index: 100;
    top: 0;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.sys-title{
    font-weight: bold;
    color: #333;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}
.logout button {
    background-image: url('https://cdn.i2233.cn/sqlimages/logout.svg');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    background-color: transparent;
    border: none;
    margin-right: 20px;
    width: 50px;
    height: 50px;
    text-indent: 100%;
    white-space: nowrap;
    overflow: hidden;
    cursor: pointer;
}

.back button {
    background-image: url('https://cdn.i2233.cn/sqlimages/back.svg');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    background-color: transparent;
    border: none;
    margin-left: 20px;
    width: 50px;
    height: 50px;
    text-indent: 100%;
    white-space: nowrap;
    overflow: hidden;
    cursor: pointer;
}