.tupianshubiaoxuanting:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0);
            transition: background .35s;
            border-radius: 8px;
            z-index: 2;
            max-width: 100%;
            margin: 0 auto;
            pointer-events: none;
        }
        .tupianshubiaoxuanting:after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 50px;
            height: 50px;
            margin: -25px 0 0 -25px;
            background:url('/js/小窗口图标/每天更换一次.php');
            background-repeat: no-repeat;
            background-size: 100% 100%;
            z-index: 3;
            -webkit-transform: scale(2);
            transform: scale(2);
            transition: opacity .35s,-webkit-transform .35s;
            transition: transform .35s,opacity .35s;
            transition: transform .35s,opacity .35s,-webkit-transform .35s;
            opacity: 0;
            pointer-events: none;
        }
        .tupianshubiaoxuanting:hover:before {
            background:rgba(0,0,0,.5)
        }
        .tupianshubiaoxuanting:hover:after {
            -webkit-transform:scale(1);
            transform:scale(1);
            opacity:1
        }