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Default style sheet for HTML 4
摘要:Thisappendixisinformative,notnormative.Thisstylesheetdescribesthetypic...

Thisappendixisinformative,notnormative.

ThisstylesheetdescribesthetypicalformattingofallHTML4([HTML4])elementsbasedonextensiveresearchintocurrentUApractice.Developersareencouragedtouseitasadefaultstylesheetintheirimplementations.

ThefullpresentationofsomeHTMLelementscannotbeexpressedinCSS2.1,includingreplacedelements("img","object"),scriptingelements("script","applet"),formcontrolelements,andframeelements.

Forotherelements,thelegacypresentationcanbedescribedinCSSbutthesolutionremovestheelement.Forexample,theFONTelementcanbereplacedbyattachingCSSdeclarationstootherelements(e.g.,DIV).Likewise,legacypresentationofpresentationalattributes(e.g.,the"border"attributeonTABLE)canbedescribedinCSS,butthemarkupinthesourcedocumentmustbechanged.

html,address,

blockquote,

body,dd,div,

dl,dt,fieldset,form,

frame,frameset,

h1,h2,h3,h4,

h5,h6,noframes,

ol,p,ul,center,

dir,hr,menu,pre{display:block}

li{display:list-item}

head{display:none}

table{display:table}

tr{display:table-row}

thead{display:table-header-group}

tbody{display:table-row-group}

tfoot{display:table-footer-group}

col{display:table-column}

colgroup{display:table-column-group}

td,th{display:table-cell}

caption{display:table-caption}

th{font-weight:bolder;text-align:center}

caption{text-align:center}

body{margin:8px}

h1{font-size:2em;margin:.67em0}

h2{font-size:1.5em;margin:.75em0}

h3{font-size:1.17em;margin:.83em0}

h4,p,

blockquote,ul,

fieldset,form,

ol,dl,dir,

menu{margin:1.12em0}

h5{font-size:.83em;margin:1.5em0}

h6{font-size:.75em;margin:1.67em0}

h1,h2,h3,h4,

h5,h6,b,

strong{font-weight:bolder}

blockquote{margin-left:40px;margin-right:40px}

i,cite,em,

var,address{font-style:italic}

pre,tt,code,

kbd,samp{font-family:monospace}

pre{white-space:pre}

button,textarea,

input,select{display:inline-block}

big{font-size:1.17em}

small,sub,sup{font-size:.83em}

sub{vertical-align:sub}

sup{vertical-align:super}

table{border-spacing:2px;}

thead,tbody,

tfoot{vertical-align:middle}

td,th{vertical-align:inherit}

s,strike,del{text-decoration:line-through}

hr{border:1pxinset}

ol,ul,dir,

menu,dd{margin-left:40px}

ol{list-style-type:decimal}

olul,ulol,

ulul,olol{margin-top:0;margin-bottom:0}

u,ins{text-decoration:underline}

br:before{content:"A"}

:before,:after{white-space:pre-line}

center{text-align:center}

:link,:visited{text-decoration:underline}

:focus{outline:thindottedinvert}

/*Beginbidirectionalitysettings(donotchange)*/

BDO[DIR="ltr"]{direction:ltr;unicode-bidi:bidi-override}

BDO[DIR="rtl"]{direction:rtl;unicode-bidi:bidi-override}

*[DIR="ltr"]{direction:ltr;unicode-bidi:embed}

*[DIR="rtl"]{direction:rtl;unicode-bidi:embed}

@mediaprint{

h1{page-break-before:always}

h1,h2,h3,

h4,h5,h6{page-break-after:avoid}

ul,ol,dl{page-break-before:avoid}

}

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