#main {
    width: 100vw;
    height: calc(100vh - 60px);
    background: url("../../img/picture/cloud.jpg") no-repeat;
    background-size: 100% 100%;
    overflow-y: auto;
    padding-top: 60px;
}

#main .top-content {
    position: relative;
    width: calc(100vw - 8px);
    height: 40vh;
    background: transparent;
    overflow: hidden;
}

#main .content {
    width: calc(100vw - 8px);
    padding: 20px;
    box-sizing: border-box;
    background-color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
}