main {
    margin: 0 auto;
    width: 1200px;
}

.title-h4 {
    margin-top: 60px;
    margin-bottom: 60px;
}

.text {
    text-indent: 2em;
    font-family: SourceHanSansCN-Regular;
    font-size: 16px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 30 px;
    letter-spacing: 2px;
    color: #292929;
}

.item-1 {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-top: 80px;
}

.item-1 li {
    display: flex;
    flex-direction: column;
    width: 262px;
    margin-bottom: 32px;
    margin-right: 50px;
}

.item-1 li:nth-of-type(4n){
    margin-right: 0;
}

.item-1 li img {
    width: 262px;
    height: 368px;
}

.item-1 p {
    margin-top: 14px;
    font-family: SourceHanSansCN-Regular;
    font-size: 14px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 1.5em;
    letter-spacing: 2px;
    color: #292929;
    height: 3em;
    text-align: center;
}

@media screen and (max-width: 768px) {
    main {
        padding: 8px .5rem;
        width:  100%;
    }

    .title-h4 {
        margin-top: 16px;
        margin-bottom: 16px;
    }

    .text {
        text-indent: 2em;
        font-size: 14px;
        line-height: 1.5em;
    }

    .item-1 {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        margin-top: 40px;
    }

    .item-1 li {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 11.5rem;
        margin-bottom: 16px;
        margin-right: 0;
    }

    .item-1 li:nth-of-type(2n){
        margin-left: .5rem;

    }

    .item-1 li img {
        width: 100%;
        height: auto;
    }

    .item-1 p {
        margin-top: 16px;
        font-size: 12px;
        line-height: 1.5em;
    }
}