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.box{ width: 300px; height: 100px; margin:10px auto; border: 1px solid #000; } // va

/**/ /*form{*/ /*width: 100%;*/ /*/!* 最大宽度*!/*/ /*max-width: 640px;*/ /*/!* 最小宽度*!/*/ /*min-width: 320px;*/ /*margin:0 a

audio { /*top: 100px;*/ display: block; height: 100px; width: 500px; margin: 0px auto; /*text-align: center;*/ backg

.box{ width: 300px; height: 100px; margin:10px auto; border: 1px solid #000; } .active{ border-radius: 50%; background-color: pink;