.h1-row{
    display: flex;
    align-items: center;
    margin-bottom: 30px;
    justify-content: space-between;
}

.h1-row .section-title{
    margin-bottom: 0;
}

.h1-row .m-button::before{
    content: "";
    width: 16px;
    height: 18px;
    display: inline-block;
    vertical-align: middle;
    margin-top: -2px;
    margin-right: 10px;
    margin-left: -2px;
    background: url("../images/file/download_white.png") center/contain no-repeat;
}

.main-part{
    background-color: #fff;
    padding: 30px;
}

h2.tri-title{
    margin-bottom: 14px;
    font-size: 20px;
}

.img-ctn{
    display: block;
    text-align: center;
    padding: 30px;
    border: 1px solid #d5d5d5;
    margin-bottom: 32px;
}

.img-ctn img{
    display: block;
    width: auto;
    height: auto;
    max-width: 100%;
    margin: auto;
}

.img-ctn:last-of-type{
    margin-bottom: 0;
}

.main-part{
    margin-bottom: 50px;
}

@media (max-width: 960px) {
    .main-part, .img-ctn{
        padding: 20px;
    }
}

@media (max-width: 640px) {
    .h1-row{
        display: block;
    }
    .img-ctn{
        padding: 0;
        border: none;
    }

    .h1-row .section-title{
        margin-bottom: 20px;
    }
}