### 重置或者清除某些标签默认样式 ***** ``` body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, textarea, p, blockquote, th, td { margin: 0; padding: 0; } ul, ol { list-style: none; } a { text-decoration: none; color: #333333 } a, span { vertical-align: top; } img { border: 0; vertical-align: middle; } input, button, text { vertical-align: top; outline: none; border: none; } button { padding: 0; background: none; cursor: pointer; } button::-moz-focus-inner { padding: 0; } textarea { outline: none; border: none; resize: none; } input, textarea { box-sizing: content-box; outline: none; background: 0 0; font-family: "Microsoft YaHei" } input::-webkit-input-placeholder, textarea::-webkit-input-placeholder { color: #acacac; } input:-moz-placeholder, textarea:-moz-placeholder { color: #acacac; } input::-moz-placeholder, textarea::-moz-placeholder { color: #acacac; } input:-ms-input-placeholder, textarea:-ms-input-placeholder { color: #acacac; } table tr td, table { border-collapse: collapse; } body { font-size: 0; color: #000; font-family: "Microsoft YaHei"; } .clearfix { *zoom: 1; } .clearfix:before, .clearfix:after { display: table; content: ""; line-height: 0; } .clearfix:after { clear: both; } .fl { float: left; } .fr { float: right; } ```