#pc-header-3 {
    width: 100%;
}
#pc-header-3 .item{
    width: 100%;
    height: 350px;
    background:no-repeat center center;
    background-size: cover;
    position: relative;
}
#pc-header-3 .item_title{
    line-height: 66px;
    height: 66px;
    font-weight: 700;
    font-size: 60px;
    position: absolute;
    width: 100%;
    text-align: center;
    top: 100px;
    color: #fff;
    letter-spacing: 10px;
}
#pc-header-3 .item_script{
    line-height: 76px;
    height: 76px;
    font-size: 43px;
    position: absolute;
    width: 100%;
    text-align: center;
    top: 180px;
    color: #fff;
    letter-spacing: 5px;
}