*{
    padding: 0;
    margin: 0;
}
#slider{
    width: 100%;
    height:500px;
    background-color: black;
    position: relative;
    margin-top: 0;
    overflow: hidden;
}
#slider>div{
    width: 100%;
    height: 500px;
    position: absolute;
    right: 0;
    left: 0;
    opacity: 0;
    background-size: cover;
    background-position: center;
    transition: all 1s linear;
}
#slider>#slide1{
    background-image: url("images/01.jpg");
    z-index: 2;
    opacity: 1;
}
#slider>#slide2{
    background-image: url("images/02.jpg");
}
#slider>#slide3{
    background-image: url("images/03.jpg");
}
#slider>#slide4{
    background-image: url("images/04.jpg");
}
#slider>#next{
    width: 50px;
    height: 50px;
    position: absolute;
    z-index: 999999;
    opacity: 0;
    background-image: url("images/next.png");
    top: 225px;
    right: -50px;
    background-size: cover;
    background-position: center;
    border-radius: 50%;
    cursor: pointer;
    transition: all .9s linear;
}
#slider:hover>#next{
    opacity: 1;
    right: 15px;
}
#slider>#prev{
    width: 50px;
    height: 50px;
    position: absolute;
    z-index: 999999;
    top: 225px;
    left: -50px;
    opacity: 0;
    background-image: url("images/prev.png");
    background-position: center;
    background-size: cover;
    cursor: pointer;
    border-radius: 50%;
    transition: all .9s linear;
}
#slider:hover>#prev{
    opacity: 1;
    left: 15px;
}
#slider>#control{
    width: 100%;
    height: 20px;
    position: absolute;
    left: 0;
    bottom: 20px;
    z-index: 999999;
    opacity: 1;
    transition: all .5s linear;
}
/*#slider:hover>#control{*/
/*opacity: 1;*/
/*bottom: 20px;*/
/*}*/
#slider>#control>#bulets{
    width: 140px;
    height: 20px;
    position: absolute;
    transform: translate(-50%, 0);
    left: 50%;
    /*background-color: aliceblue;*/
}
#slider>#control>#bulets>span{
    width: 20px;
    height: 20px;
    float: left;
    opacity: 1;
    background-color: rgba(0,0,0,.6);
    position: relative;
    cursor: pointer;
    transition: all .5s linear;
}
/*#slider>#control>#bulets>span:hover{*/
/*opacity: 1;*/
/*}*/
#slider>#control>#bulets>#bulet1{
    background-color: rgba(255,0,0,.4);
}
#slider>#control>#bulets>#bulet2{
    margin: 0 20px;
}
#slider>#control>#bulets>#bulet3{
    margin-right: 20px;
}
#slider>#control>#bulets>span>span{
    width: 90px;
    height: 70px;
    position: absolute;
    bottom: 30px;
    left: -35px;
    opacity: 0;
    background-size: cover;
    background-position: center;
    border: 1px solid rgba(0,0,0,.6);
    box-sizing: border-box;
    transition: all .5s linear;
}
#slider>#control>#bulets>span:hover>span{
    opacity: 1;
}
#slider>#control>#bulets>#bulet1>span{
    background-image: url("images/01.jpg");
}
#slider>#control>#bulets>#bulet2>span{
    background-image: url("images/02.jpg");
}
#slider>#control>#bulets>#bulet3>span{
    background-image: url("images/03.jpg");
}
#slider>#control>#bulets>#bulet4>span{
    background-image: url("images/04.jpg");
}
@media screen and (max-width: 1200px){
    #slider{
        height:450px;
    }
    #slider>div{
        height: 450px;
    }
    #slider>#next{
        top: 200px;
    }
    #slider>#prev{
        top: 200px;
    }
}
@media screen and (max-width: 900px){
    #slider{
        height:350px;
    }
    #slider>div{
        height: 350px;
    }
    #slider>#next{
        top: 150px;
    }
    #slider>#prev{
        top: 150px;
    }
}