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/CSS3

/css3實(shí)現(xiàn)網(wǎng)頁(yè)平滑過(guò)渡效果

[data-icon]:after{
????content:attr(data-icon);
????width:260px;
????height:260px;
????background-color:#ddd;
????color:#fff;
????font-size:90px;
????text-align:center;
????line-height:260px;
????position:absolute;
????left:50%;
????top:50%;
}