/**自定义 css**/
@media screen and (min-width:750px) {
    .i_store {
        max-width: 1920px;
        margin: 50px auto 0;
    }

    .i_store ul {
        margin-top: 30px;
    }

    .i_store ul li {
        float: left;
        width: 220px;
        margin-left: 10px;
        height: 132px;
        position: relative;
        border-radius: 10px;
        margin-bottom: 10px;
    }

    .i_store ul li img {
        height: 100%;
        display: block;
        border-radius: 8px;
        border-top: solid 1px #ccc;
    }
}

@media screen and (max-width:750px) {
    .i_store {
        max-width: 750px;
        margin: 5rem auto 0;
    }

    .i_store ul {
        margin-top: 3rem;
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: space-around;
    }

    .i_store ul li {
        width: 45%;
        height: auto;
        padding: 0.5rem 0;
        position: relative;

    }

    .i_store ul li img {
        width: 100%;
        display: block;
        border-radius: 0.8rem;
        border-top: solid 0.1rem #ccc;
    }

}