css修改滚动条样式

<div class="inner"> ???<div class="innerbox"> ???????<p style="height:200px;">这是内容111</p> ???????<p style="height:400px;">这里是内容222</p> ???????<p>这里是内容333</p> ???</div></div>

　.inner{ ???????????width: 265px; ???????????height: 400px; ???????????position: absolute; ???????????top: 33px; ???????????left: 13px; ???????????/*cursor: pointer;*/ ???????????overflow:hidden; ???????} ???????.innerbox{ ???????????overflow-x: hidden; ???????????overflow-y: auto; ???????????color: #000; ???????????font-size: .7rem; ???????????font-family: "\5FAE\8F6F\96C5\9ED1",Helvetica,"黑体",Arial,Tahoma; ???????????height: 100%; ???????} ???????/*滚动条样式*/ ???????.innerbox::-webkit-scrollbar {/*滚动条整体样式*/ ???????????width: 4px; ????/*高宽分别对应横竖滚动条的尺寸*/ ???????????height: 4px; ???????} ???????.innerbox::-webkit-scrollbar-thumb {/*滚动条里面小方块*/ ???????????border-radius: 5px; ???????????-webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2); ???????????background: rgba(0,0,0,0.2); ???????} ???????.innerbox::-webkit-scrollbar-track {/*滚动条里面轨道*/ ???????????-webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2); ???????????border-radius: 0; ???????????background: rgba(0,0,0,0.1); ???????}