CSS样式表重置
网页设计,让人最头疼的莫过于让页面兼容各大浏览器,准确些是兼容它们“默认”的CSS样式表。这样,“抹掉”这些默认样式表成了首要问题,也就有了CSS样式表重置一说。
.clearfix:before, .clearfix:after { content: ""; display: table } .clearfix:after { clear: both } html, body { height: 100% } html { font-family: "Helvetica Neue", Helvetica, STHeiTi, Arial, sans-serif; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; font-size: 62.5% } body { margin: 0; font-size: 1.4rem; line-height: 1.5; color: #333; background-color: #fff } article, aside, details, figcaption, figure, footer, header, hgroup, main, nav, section, summary { display: block } audio, canvas, progress, video { display: inline-block; vertical-align: baseline } audio:not([controls]) { display: none; height: 0 } [hidden], template { display: none } a { background: transparent; text-decoration: none; -webkit-tap-highlight-color: transparent; color: #08c } a:active { outline: 0 } a:active { color: #069 } abbr[title] { border-bottom: 1px dotted } b, strong { font-weight: bold } dfn { font-style: italic } mark { background: #ff0; color: #000 } small { font-size: 80% } sub, sup { font-size: 75%; line-height: 0; position: relative; vertical-align: baseline } sup { top: -0.5em } sub { bottom: -0.25em } img { border: 0; vertical-align: middle } svg:not(:root) { overflow: hidden } hr { -moz-box-sizing: content-box; box-sizing: content-box; height: 0 } pre { overflow: auto; white-space: pre; white-space: pre-wrap; word-wrap: break-word } code, kbd, pre, samp { font-family: monospace, monospace; font-size: 1em } button, input, optgroup, select, textarea { color: inherit; font: inherit; margin: 0 } button { overflow: visible } button, select { text-transform: none } button, html input[type="button"], input[type="reset"], input[type="submit"] { -webkit-appearance: button; cursor: pointer } button[disabled], html input[disabled] { cursor: default } button::-moz-focus-inner, input::-moz-focus-inner { border: 0; padding: 0 } input { line-height: normal } input[type="checkbox"], input[type="radio"] { box-sizing: border-box; padding: 0 } input[type="number"]::-webkit-inner-spin-button, input[type="number"]::-webkit-outer-spin-button { height: auto } input[type="search"] { -webkit-appearance: textfield; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box } input[type="search"]::-webkit-search-cancel-button, input[type="search"]::-webkit-search-decoration { -webkit-appearance: none } fieldset { border: 1px solid #c0c0c0; margin: 0 2px; padding: 0.35em 0.625em 0.75em } legend { border: 0; padding: 0 } textarea { overflow: auto; resize: vertical } optgroup { font-weight: bold } table { border-collapse: collapse; border-spacing: 0 } td, th { padding: 0 } html, button, input, select, textarea { font-family: "Helvetica Neue", Helvetica, STHeiTi, Arial, sans-serif } h1, h2, h3, h4, h5, h6, p, figure, form, blockquote { margin: 0 } ul, ol, li, dl, dd { margin: 0; padding: 0 } ul, ol { list-style: none outside none } h1, h2, h3 { line-height: 2; font-weight: normal } h1 { font-size: 1.8rem } h2 { font-size: 1.6rem } h3 { font-size: 1.4rem } input::-moz-placeholder, textarea::-moz-placeholder { color: #ccc } input:-ms-input-placeholder, textarea:-ms-input-placeholder { color: #ccc } input::-webkit-input-placeholder, textarea::-webkit-input-placeholder { color: #ccc } * { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box }