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Fix the problem of line spacing when using sub and sup sub,sup{font-size:75%;Line-height:0;position:relative;vertical-align:Baseline;}sup{Top:-0.5em;}Sub{Bottom:-0.25em;}. P{letter-spacing:4em;/*Letter Spacing (kerning)*/word-spacing:0.4em/5px;/*Word spacing*/text-indent:1.5em/18px;/*indent first line in paragraph*/White-space:Pre/nowrap/normal;/*Space output Format*/Text-transform: ;/*Modify text Case*/font-variant:;/*use small capital letters*/}--------------------------------------------------------background-attachment:fixed/scroll; background with page scrolling head plus C lass= "Clearfix"--------------------------------------------------------normally,<pre></pre> guaranteed output, So the wrap is off and the CSS pre{White-space:Pre-warp;}turn on Wrap-----------------------------------------------------------------------------------------------------1. Apply multiple to a single element Heavy background. Neight-sky{Background-color:#333;Background-image:URL (), url () , url ();background-position:50% 102%,100% -150%,0% -150%;background-repeat:no-repeat,no-repeat,no-repeat;}abbreviation. Neight-sky{Background-color:#333;background:URL () 0 0 no-repeat,url () 0 0 no-repeat;just write it a few more times.}2. Try the gradient background. Neight-sky{background:Linear-gradient (left, #333, #777);linear-gradient linear Gradient radial-gradient radial gradient multi-color gradient background (top, #ff0000 0, #00ff00 50%, #0000ff 100%);}-----------------------------------------------------------------------------------------------------Browser mode operation-moz- Firefox and other browsers using the Mozilla rendering engine-webkit-chrome,safari-o-OPERA-MS-IE8 and above--------------------------- -----------------------------CSS font embedding @font-face{font-family: ;src:URL () format ();Font-style: ;Font-weight: ;}

Learn about CSS in the process of collecting