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滑过
.box { box-sizing:border-box; position:relative; margin:20px auto; width:200px; height:40px; line-height:40px; text-align:center; border:1px solid lightcoral; } .box .detail { display:none; position:adsolute; right:-1px; top:38px; box-sizing:border-box; width:500px; height:100px; line-height:100px; text-align:center; border:1px solid lightcoral; } .box:hover .detail { display:block; }