.manners ul
{
    background: none;
    box-sizing: border-box;
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    justify-content: space-between;
    margin: 0;
    padding: 0;
}
.manners li
{
    background: #eee;
    border-radius: 10px;
    box-sizing: border-box;
    margin: 0;
    padding: 40px;
    text-align: center;
    width: calc((100% - 200px) / 3);
}
.manners li:nth-of-type(n+4)
{
    margin: 40px 0 0 0;
}
.manners li img
{
    margin: auto;
    width: 50%;
}
.manners li p
{
    margin: 20px 0 0 0;
    text-align: left;
}





@media all and (max-width: 768px) {
                .manners li
                {
                    padding: 20px;
                    text-align: center;
                    width: calc((100% - 20px) / 2);
                }
                .manners li:nth-of-type(n+3)
                {
                    margin: 20px 0 0 0;
                }
                .manners li img
                {
                    margin: auto;
                    width: 100%;
                }
}