.box{
    margin-top: 300px;
    width: 100%;
    height: 340px;

    position: relative;
}

.l_list{
    width: 1200px;
    height: 300px;
    overflow: hidden;
    position: absolute;
    left: 50%;
    margin-left: -600px;
}

.l_btn{
    position: absolute;
    top: 50%;
    margin-top: -50px;
    width: 60px;
    height: 100px;
    line-height: 100px;
    font-size: 30px;
    color: white;
    text-decoration: none;
    text-align: center;
    background: rgba(0,255,0,.5);
    cursor: pointer;
}
.next{
    right: 0;
}

.p1,.p2,.p3,.p4,.p5,.p6,.p7 {
    position: absolute;
    top: 0;
    left: 0;
    list-style: none;
    opacity: 0;
    transition: all 0.3s ease-out;
}
.l_box img{
    width: 751px;
    height: 300px;
    border:none;
    float: left;
}
.p1{
    transform:translate3d(-224px,0,0) scale(0.81);
}
.p2{
    transform:translate3d(0px,0,0) scale(0.81);
    transform-origin:0 50%;
    opacity: 0.8;
    z-index: 2;
}
.p3{
    transform:translate3d(224px,0,0) scale(1);
    z-index: 3;
    opacity: 1;
}
.p4{
    transform:translate3d(449px,0,0) scale(0.81);
    transform-origin:100% 50%;
    opacity: 0.8;
    z-index: 2;
}
.p5{
    transform:translate3d(672px,0,0) scale(0.81);
}
.p6{
    transform:translate3d(896px,0,0) scale(0.81);
}
.p7{
    transform:translate3d(1120px,0,0) scale(0.81);
}

.l_buttons{
    position: absolute;
    width: 1200px;
    height: 30px;
    top: 460px;
    left: 50%;
    margin-left: -600px;
    text-align: center;
    padding-top: 10px;
}
.l_buttons a{
    display: inline-block;
    width: 35px;
    height: 5px;
    padding-top: 4px;
    cursor: pointer;
}
.l_buttons span{
    display: block;
    width: 35px;
    height: 1px;
    background: red;
}
.blue{
    background: blue;
}