.tongji {
    margin: 0;
    padding: 10px 0 0;
    background-color: #fff;
    border-radius: 0 0 4px 4px;
    overflow: hidden;
}

.tongji ul {
    width: calc(100% + 8px);
}

.tongji ul li {
    margin: 0 8px 8px 0;
    padding: 4px 8px;
    width: 42%;
    float: left;
    border-radius: 4px;
    background-color: #f3f3f3;
    border-color: #f3f3f3;
}

.tongji ul li:nth-child(even) {
    margin: 0 0 8px;
}

@media only screen and (max-width:1024px) {
    .tongji ul li {
        margin: 0 0 8px;
        width: 90%;
    }
}

@media only screen and (max-width:768px) {
    .tongji ul {
        width: calc(100% + 14px);
    }
    .tongji ul li {
        margin: 0 8px 8px 0;
        width: 46%;
    }
}

@media only screen and (max-width:425px) {
    .tongji ul li {
        width: 44%;
    }
}

@media only screen and (max-width:375px) {
    .tongji ul li {
        width: 43%;
    }
}

@media only screen and (max-width:320px) {
    .tongji ul li {
        width: 40%;
    }
}