.total-Ranking-div{
    width: 100%;
    height: auto;
    /* 浮动撑开高度 */
    overflow: hidden;
}
.total-Ranking-item{
    float: left;
    display: block;
    box-sizing: border-box;
    margin-bottom: 15px;
    width: 278px;
    height: auto;
    outline: none;
}

.total-Ranking-item .solution-card .title .high-light {
    color: red;
}