*{
    margin: 0;
    padding: 0;
}
img{
    border:0;
}
ol, ul ,li{list-style: none;} 

#dlunbo {
    width: 100%;
    height: 600px;
    position: relative;
}
.pic {
    position: absolute;
    
}
.pic img{
   height: 600px;
    width: 100%;
}

#tabs {
    position: absolute;
    height: 30px;
    width: 220px;
    bottom: 10px;
    left: 50%;
    margin-left: -110px;
}

.tab {
    width: 30px;
    height: 30px;
    background-color: #0094ff;
    float: left;
    text-align: center;
    line-height: 30px;
    color: #fff;
    margin-right: 5px;
    border-radius: 100%;
    cursor: pointer;
}

.btn {
    width: 40px;
    height: 60px;
    position: absolute;
    background: rgba(0,0,0,0.5);
    color: #fff;
    font-size: 40px;
    text-align: center;
    line-height: 60px;
    top: 50%;
    margin-top: -30px;
    cursor: pointer;
    display: none;
}

.btn1 {
    left: 0px;
}

.btn2 {
    right: 0px;
}

.bg {
    background-color:rgb(255, 0, 0);
}