.sliderWrap {
    float: left;
    width: 80%;
    height:210px;
    margin: auto;
    position:relative;
}

#slider {
    position: relative;
    overflow: hidden;
    margin: 0 auto;
    border-radius: 4px;
}

#slider ul {
    position: relative;
    margin: 0;
    padding: 0;
    height: 200px;
    list-style: none;
}

#slider ul li {
    position: relative;
    display: block;
    float: left;
    padding: 0;
    width: 728px;
    height: 210px;
    background: #ccc;
    text-align: center;
    line-height: 300px;
    margin-top:-46px;
}

a.control_prev, a.control_next {
    position: absolute;
    top: 40%;
    z-index: 999;
    display: block;
    padding: 2% 1%;
    width: auto;
    height: auto;
    background: #2a2a2a;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    opacity: 0.8;
    cursor: pointer;
}

a.control_prev:hover, a.control_next:hover {
    opacity: 1;
    -webkit-transition: all 0.2s ease;
}

a.control_prev {
    border-radius: 0 2px 2px 0;
}

a.control_next {
    right: 0;
    border-radius: 2px 0 0 2px;
}

.slider_option {
    position: relative;
    margin: 10px auto;
    width: 160px;
    font-size: 18px;
}

@media only screen and (max-width: 1200px) {

    .sliderWrap {
        width:728px;
    }

}

@media only screen and (max-width: 768px) {
    #slider ul li {
        margin: 0;
        padding: 0;
        width: 560px;
        height: 162px;
        background: #ccc;
        text-align: center;
        line-height: 300px;
        margin-top: -70px;
    }

    .sliderWrap {
        width:560px;
        height:162px;
        margin:0 auto;
        background-color:#ffffff;
        padding-left:0;
    }
}

@media only screen and (max-width: 600px) {
    #slider ul li {
        margin: 0;
        padding: 0;
        width: 360px;
        height: 104px;
        background: #ccc;
        text-align: center;
        line-height: 300px;
        margin-top: -100px;
    }

    .sliderWrap {
        width:360px;
        height:104px;
        margin:0 auto;
        background-color:#ffffff;
        padding-left:0;
    }
}