CSS reset -- (from Netease), cssreset --
/* reset */html,body,h1,h2,h3,h4,h5,h6,div,dl,dt,dd,ul,ol,li,p,blockquote,pre,hr,figure,table,caption,th,td,form,fieldset,legend,input,button,textarea,menu{margin:0;padding:0;}header,footer,section,article,aside,nav,hgroup,address,figure,figcaption,menu,details{display:block;}table{border-collapse:collapse;border-spacing:0;}caption,th{text-align:left;font-weight:normal;}html,body,fieldset,img,iframe,abbr{border:0;}i,cite,em,var,address,dfn{font-style:normal;}[hidefocus],summary{outline:0;}li{list-style:none;}h1,h2,h3,h4,h5,h6,small{font-size:100%;}sup,sub{font-size:83%;}pre,code,kbd,samp{font-family:inherit;}q:before,q:after{content:none;}textarea{overflow:auto;resize:none;}label,summary{cursor:default;}a,button{cursor:pointer;}h1,h2,h3,h4,h5,h6,em,strong,b{font-weight:bold;}del,ins,u,s,a,a:hover{text-decoration:none;}body,textarea,input,button,select,keygen,legend{font:12px/1.14 arial,\5b8b\4f53;color:#333;outline:0;}body{background:#fff;}a,a:hover{color:#333;}
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Overview: reset the style, clear the default style of the browser, and configure the basic style suitable for the design (emphasize whether the text is mostly bold, main text color, main link color, main font, etc ).