.b-content{
    width: 100%;
    height: 50px;
    margin-top: 50px;
}
.b-content ul{
    width: 70%;
    height: 50px;
    margin-left: 15%;
    background-color: #ffffff;
}
.b-content ul li{
    display: inline-block;
    height:50px;
    width: 300px;
    text-align: center;
    line-height: 50px;
    font-size: 16px;
}
@media all and (max-width:1700px) {
    .b-content ul li {
        width: 250px;
    }
    .c-title h4 {
        font-size: 28px;
    }
}

@media all and (max-width:1460px) {
    .b-content ul li {
        width: 238px;
    }
}

@media all and (max-width:1380px) {
    .b-content ul li {
        width: 220px;
    }
}

@media all and (max-width:1300px) {}

@media all and (max-width:1280px) {
    .b-content ul li {
        width: 204px;
    }
}

@media all and (max-width:1200px) {
    .b-content ul li {
        width: 174px;
    }
    .c-title h4 {
        font-size: 20px;
    }
}


@media all and (max-width:900px) {
    .b-content ul {
        width: 94%;
        height: auto;
        margin-left: 3%;
        overflow: hidden;
    }
    .b-content {
        width: 100%;
        height: auto;
        margin-top: 20px;
        overflow: hidden;
    }
    .b-content ul li {
        display: block;
        width: 100%;
        line-height: 50px;
        font-size: 18px;
    }
    .c-title h4 {
        font-size: 15px;
    }
}