/*reset*/*,::before,::after{ margin: 0; padding: 0;? ? -webkit-tap-highlight-color: transparent;? ? -webkit-box-sizing: border-box;? ? box-sizing: border-box;}body{ font-size:14px; font-family: "microsoft yahei",sans-serif; color: #333;}a{ color: #333;? ? text-decoration: none;}a:hover{ text-decoration: none;}ul,ol{? ? list-style: none; }input{ border: none; outline: none; -webkit-appearance: none;}/*commom*/.f_left{ float: left;}.f_right{ float: right;}.clearfix::before;.clearfix::after{ content: ""; height: 0; line-height: 0; display: block;? ? visibility: hidden;? ? clear:both;}[class^="icon_"]{? ? background: url("../images/sprites.png") no-repeat;? ? background-size: 200px 200px;}.m_l10{? ? margin-left: 10px;}.m_r10{? ? margin-right: 10px;}.m_b10{? ? margin-bottom: 10px;}.m_t10{? ? margin-top: 10px;}
1 回答

MarlboroKay
TA貢獻(xiàn)189條經(jīng)驗(yàn) 獲得超236個(gè)贊
偽類,子類型選擇器,好好看看《css權(quán)威指南》這本書,會(huì)對你有幫助。
望采納!
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