.ifr-alink {
    background: url(1506750460000banner.jpg) center no-repeat;
    background-size: cover;
}
@media screen and (min-width: 980px) {
    .ifr-alink {
        background: url(https://baidu-yunapp.bj.bcebos.com/1506750527000banner.jpg) center no-repeat;
        background-size: cover;
    }
}

@-moz-keyframes bounce-anim {
    25% {
        -webkit-transform: scale(1.3);
        -moz-transform: scale(1.3);
        -o-transform: scale(1.3);
        -ms-transform: scale(1.3);
        transform: scale(1.3);
    }
    50% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
    75% {
        -webkit-transform: scale(1.3);
        -moz-transform: scale(1.3);
        -o-transform: scale(1.3);
        -ms-transform: scale(1.3);
        transform: scale(1.3);
    }
    100% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}
@-webkit-keyframes bounce-anim {
    25% {
        -webkit-transform: scale(1.3);
        -moz-transform: scale(1.3);
        -o-transform: scale(1.3);
        -ms-transform: scale(1.3);
        transform: scale(1.3);
    }
    50% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
    75% {
        -webkit-transform: scale(1.3);
        -moz-transform: scale(1.3);
        -o-transform: scale(1.3);
        -ms-transform: scale(1.3);
        transform: scale(1.3);
    }
    100% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}
@-o-keyframes bounce-anim {
    25% {
        -webkit-transform: scale(1.3);
        -moz-transform: scale(1.3);
        -o-transform: scale(1.3);
        -ms-transform: scale(1.3);
        transform: scale(1.3);
    }
    50% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
    75% {
        -webkit-transform: scale(1.3);
        -moz-transform: scale(1.3);
        -o-transform: scale(1.3);
        -ms-transform: scale(1.3);
        transform: scale(1.3);
    }
    100% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}
@keyframes bounce-anim {
    25% {
        -webkit-transform: scale(1.3);
        -moz-transform: scale(1.3);
        -o-transform: scale(1.3);
        -ms-transform: scale(1.3);
        transform: scale(1.3);
    }
    50% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
    75% {
        -webkit-transform: scale(1.3);
        -moz-transform: scale(1.3);
        -o-transform: scale(1.3);
        -ms-transform: scale(1.3);
        transform: scale(1.3);
    }
    100% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}
.play-btn {
    width: 6rem;
    height: 3rem;
    position: absolute;
    right: 1.5rem;
    bottom: 1.5rem;
    background-color: #40c87f;
    -webkit-border-radius: 45px;
    -moz-border-radius: 45px;
    border-radius: 45px;
    text-align: center;
    line-height: 3rem;
    font-size: 1.5rem;
    color: #ffffff;
    margin: 0;
    cursor: pointer;
}
.play-btn-anim {
    animation: bounce-anim 1s;
}