HTML元素的默认样式

html,body,div, h1,h2,h3,h4,h5,h6,p, ol,ul,dl,dt,dd,

frame,frameset,form,fieldset, blockquote,address,hr,pre { display: block }

button,textarea,input,select { display: inline-block }

li { display: list-item }

head { display: none }

table { display: table }

caption { display: table-caption }

thead { display: table-header-group }

tbody { display: table-row-group }

tfoot { display: table-footer-group }

tr { display: table-row }

col { display: table-column }

colgroup { display: table-column-group }

td,th { display: table-cell }

caption { text-align: center }

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

body { margin: 8px }

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

h4,p,blockquote,ul,fieldset,form,ol,dl { margin: 1.12em 0 }

h1 { font-size: 2em; margin: 0.67em 0 }

h2 { font-size: 1.5em; margin: 0.75em 0 }

h3 { font-size: 1.17em; margin: 0.83em 0 }

h5 { font-size: 0.83em; margin: 1.5em 0 }

h6 { font-size: 0.75em; margin: 1.67em 0 }

pre { white-space: pre }

h1,h2,h3,h4,h5,h6,strong { font-weight: bolder }

cite,em,var,address { font-style: italic }

pre,code,kbd,samp { font-family: monospace }

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 }

del { text-decoration: line-through }

ins { text-decoration: underline }

hr { border: 1px inset }

ol, ul, dd { margin-left: 40px }

ol { list-style-type: decimal }

ol ul, ul ol, ul ul, ol ol { margin-top: 0; margin-bottom: 0 }

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

br:before { content: "\A" }

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

:focus { outline: thin dotted invert }