HTML元素的W3C默认样式

1. html, address,
2. blockquote,
3. body, dd, div,
4. dl, dt, fieldset, form,
5. frame, frameset,
6. h1, h2, h3, h4,
7. h5, h6, noframes,
8. ol, p, ul, center,
9. dir, hr, menu, pre { display: block }
10. li { display: list-item }
11. head { display: none }
12. table { display: table }
13. tr { display: table-row }
14. thead { display: table-header-group }
15. tbody { display: table-row-group }
16. tfoot { display: table-footer-group }
17. col { display: table-column }
18. colgroup { display: table-column-group }
19. td, th { display: table-cell }
20. caption { display: table-caption }
21. th { font-weight: bolder; text-align: center }
22. caption { text-align: center }
23. body { margin: 8px }
24. h1 { font-size: 2em; margin: .67em 0 }
25. h2 { font-size: 1.5em; margin: .75em 0 }
26. h3 { font-size: 1.17em; margin: .83em 0 }
27. h4, p,
28. blockquote, ul,
29. fieldset, form,
30. ol, dl, dir,
31. menu { margin: 1.12em 0 }
32. h5 { font-size: .83em; margin: 1.5em 0 }
33. h6 { font-size: .75em; margin: 1.67em 0 }
34. h1, h2, h3, h4,
35. h5, h6, b,
36. strong { font-weight: bolder }
37. blockquote { margin-left: 40px; margin-right: 40px }
38. i, cite, em,
39. var, address { font-style: italic }
40. pre, tt, code,
41. kbd, samp { font-family: monospace }
42. pre { white-space: pre }
43. button, textarea,
44. input, select { display: inline-block }
45. big { font-size: 1.17em }
46. small, sub, sup { font-size: .83em }
47. sub { vertical-align: sub }
48. sup { vertical-align: super }
49. table { border-spacing: 2px; }
50. thead, tbody,
51. tfoot { vertical-align: middle }
52. td, th { vertical-align: inherit }
53. s, strike, del { text-decoration: line-through }
54. hr { border: 1px inset }
55. ol, ul, dir,
56. menu, dd { margin-left: 40px }
57. ol { list-style-type: decimal }
58. ol ul, ul ol,
59. ul ul, ol ol { margin-top: 0; margin-bottom: 0 }
60. u, ins { text-decoration: underline }
61. br:before { content: "\A" }
62. :before, :after { white-space: pre-line }
63. center { text-align: center }
64. :link, :visited { text-decoration: underline }
65. :focus { outline: thin dotted invert }
66. /* Begin bidirectionality settings (do not change) */
67. BDO[DIR="ltr"] { direction: ltr; unicode-bidi: bidi-override }
68. BDO[DIR="rtl"] { direction: rtl; unicode-bidi: bidi-override }
69. *[DIR="ltr"] { direction: ltr; unicode-bidi: embed }
70. *[DIR="rtl"] { direction: rtl; unicode-bidi: embed }
71. @media print {
72. h1 { page-break-before: always }
73. h1, h2, h3,
74. h4, h5, h6 { page-break-after: avoid }
75. ul, ol, dl { page-break-before: avoid }
76. }