.index_content_catalog {
    padding-top: 30px;
}
.head_section {
    width: 20%;
    text-align: center;
    float: left;
    padding: 0px 10px 40px 10px;
}
.head_section_pic {
    height: 120px;
}
.head_section_pic img {
    max-width: 100%;
    max-height: 100%;
}
.head_section_name {
    font-size: 18px;
}
.head_section:nth-child(5n+1) {
    clear: both;
}
.head_section a {
    color: #0dc3f1;
}
@media (max-width: 979px) {
    .head_section {
        width: 33%;
    }
    .head_section:nth-child(5n+1) {
        clear: none;
    }
    .head_section:nth-child(3n+1) {
        clear: both;
    }
    .head_section:last-child {
        margin-left: 33%;
    }
}