* {
    margin: 0;
    padding: 0;
}

body {
    background: #ecfaff;
}

li {
    list-style: none;
}


.play {
    width: 100%;
    height: 420px;
    margin: 0;
    overflow: hidden;
    position: relative;
}
image{
    display: block;
    width: 100%;
    height: 420px;
}
ol {
    position: absolute;
    right: 45%;
    bottom: 5px;
    z-index: 999999;
}

ol li {
    display: inline-block;
    width: 15px;
    height: 15px;
    border: 1px solid white;
    background-color: #9a9a9a;
    border-radius: 50%;
}

.active {
    background-color: #26a26f;
}

#img {
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}
.play a{
    width: 35px;
    filter: alpha(opacity:50);
    opacity: 0.5;
    position: absolute;
    z-index: 2;
}
.play a:hover{
    filter:alpha(opacity:100);
    opacity: 1;
}
#prev{
    left: 5%;
    top: 45%;
}
#next{
    right: 5%;
    top: 45%;
}

@media screen and (max-width: 480px) {
    .play {

        height: 240px;

    }
    #img {
        height: 240px;
    }
}