.container{
    /*padding: 50px;*/
    /*background:#fff;*/
}
.topic-box{
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
}
.topic-box-main{
    /*width: 30%;*/
    width: 370px;
    /*height: 320px;*/
    height: 290px;
    margin-right: 5px;
    margin-left: 5px;
    background-color: #fff;
    border-radius: 4.5px;
    box-shadow: rgb(0 0 0 / 15%) 0px 0px 20px 0px;
    margin-top: 30px;
    box-sizing: border-box;
    cursor: pointer;
}
.topic-box-main:hover{
    transform: scale(1.01);
}
.topic-box-main img{
    /*height: 240px;*/
    height: 229px;
    /*width: 100%;*/
    width: 370px;
    border-radius: 4.5px 4.5px 0.5px 0px;
}
.topic-box-main_title{
    display: flex;
    height: 60px;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 16px;
    /*font-size: 20px;*/
}

.title-bg {
    /*background: #fff url(inv_topic_title_bg.png) center no-repeat;*/
    background-size: auto 100%;
    width: 100%;
    height: 100px;
    color: #FFF;
}
.i-top-title {
    text-align: center;
    /*text-shadow: 2px 2px 2px #000;*/
    color: black;
    margin-top: 40px;
    font-size: 48px;
}