Mozilla推荐的CSS书写顺序

//显示属性
display
list-style
position
float
clear

//自身属性
width
height
margin
padding
border
background

//文本属性
color
font
text-decoration
text-align
vertical-align
white-space
other text
content

源文件在这里：Mozilla suggested css order

内容如下：

/* mozilla.org Base Styles
 * maintained by fantasai
 * (classes defined in the Markup Guide - http://mozilla.org/contribute/writing/markup )
 */
/* Suggested order:
 * display
 * list-style
 * position
 * float
 * clear
 * width
 * height
 * margin
 * padding
 * border
 * background
 * color
 * font
 * text-decoration
 * text-align
 * vertical-align
 * white-space
 * other text
 * content
 *
 */

/* TOC:
   Random HTML Styles
     Forms
   General Structure
   Navigation
   Quotations
   Comments and Other Asides
   Emphasis
   Computers - General
   Code
   Examples and Figures
   Q and A (FAQ)
   Tables
   Headers
   Meta
   Specific to Products Pages
*/
/* Random HTML Styles */

    dt {
        font-weight: bold;
    }
    
    dd {
        margin: 0 0 1em 1em;
    }
    
    li {
        margin-top: 0.2em;
        margin-bottom: 0.2em;
    }
    
    sup {
        font-size: 70%;
    }

    form {
        margin: 0;
        display: inline;
    }

    label {
        font-weight: bold;
    }

/* General Structure */
    
    .subtitle {
        font-style: italic;
    }

    div.para {
        margin: 1em 0;
    }

    div.para > ul,
    div.para > ol,
    div.para > blockquote {
        margin-top: 0.2em;
        margin-bottom: 0.2em;
    }

    div.section {
        display: block;
        padding-left: 3%;
    }

    div.section > h2,
    div.section > h3,
    div.section > h4,
    div.section > h5,
    div.section > h6 {
        margin-left: -1.3%;
    }
    
    .block {
      display: block;
      margin: 0.1em 1em;
    }
    
    .imgright {
        float: right;
        margin: 0 0 2em 2em;
    }
    
    .first {
        margin-top: 0; /* For IE not understanding :first-child */
    }

/* Navigation */

    :link img,
    :visited img {
        border: 0;
    }
    .deepLevel #mainContent :link img,
    .deepLevel #mainContent :visited img {
        border: medium solid;
    }
    .deepLevel #mainContent #buttons :link img,
    .deepLevel #mainContent #buttons :visited img {
        border: 0;
    }

    .ex-ref {
        font-style: italic;
    }

    dl.toc dt {
        margin-top: 1em;
        font-size: 110%;
    }
    dl.toc p {
        margin: 0;
        text-indent: 1em;
    }
    dl.toc p:first-child {
        text-indent: 0;
    }
    dl.toc > dd {
        margin-left: 1em;
    }

    ol.toc ol {
        list-style-type: circle;
    }
    ol.toc > li > ol {
        font-size: 90%;
    }

    ul.snav {/* section navigation or short navigation, whichever you prefer */
        margin: 0.7em 10%;
        padding: .2em;
        text-align: center;
        list-style-type: none;
    }
    ul.snav > li {
        margin: 0;
        padding: 0;
    }
    ul.snav > li {
        display: inline;
    }
    ul.snav > li:before {
        content: " | ";
    }
    ul.snav > li:first-child:before {
        content: "";
    }

    @media screen, print, handheld, projection {
        p.crumbs em {
            display: none;
        }
    }

    #mainContent > p.crumbs:first-child,
    #side > p.crumbs:first-child {
        margin-top: 0;
    }

    a.cont {
        display: block;
        margin-right: 0;
        text-align: right;
    }

/* Quotations */

    blockquote > address {
        padding-left: 1em;
        text-indent: -1em;
    }
    blockquote > address:before {
        content: "2015";
    }

    div.quote,
    div.epigraph {
        margin: 1em;
    }
    div.quote q,
    div.epigraph q {
        display: block;
        margin: 0 .5em;
        text-indent: -0.5em;
    }
    div.quote cite,
    div.epigraph cite {
        display: block;
        padding: 0 1em;
        text-align: right;
        text-indent: -1em;
    }
    div.quote cite:before,
    div.epigraph cite:before {
        content: "2015";
    }

    blockquote.epigraph,
    div.epigraph q {
        font-style: italic;
        text-align: right;
    }
    blockquote.epigraph em,
    div.epigraph q em {
        font-style: normal;
    }
    blockquote.epigraph address,
    div.epigraph cite {
        font-style: normal;
    }

/* Comments and other Asides */

    .note {
        font-style: italic;
    }
    .note:before {
        content: "Note: ";
    }

    .remark {
        font-size: smaller;
    }
    .remark:before {
        content: "[";
    }
    .remark:after {
        content: "]";
    }

    .sidenote {
        clear: both;
        margin: 0.75em 0.5em;
        padding: 0.2em;
        border: 1px solid;

        /* Block NS4 from floating */ /*/*/
        float: right;
        width: 30%;
        min-width: 15em;
        /* */
    }
    /* Reduce main header sizes */
    .sidenote h1 {font-size: 1.40em;}
    .sidenote h2 {font-size: 1.25em;}
    .sidenote h3 {font-size: 1.10em;}

    .key-point > h1:first-child,
    .key-point > h2:first-child,
    .key-point > h3:first-child,
    .key-point > h4:first-child,
    .key-point > h5:first-child,
    .key-point > h6:first-child {
        margin-top: 0;
    }

/* Emphasis */

    /* em, strong */

    strong.stronger {
        font-style: italic;
        font-weight: bold;
    }

    strong.very-strong {
        font-weight: bold;
        text-transform: uppercase;
    }

    *.important,
    div.important,
    p.important {
        margin: 1em;
        padding: 0.1em;
        border: solid #F00;
        font-size: larger;
    }
    
    span.important {
        margin: 0;
        padding: 0;
        border: 0;
        font-size: smaller;
        color: #c00;
    }

/* Computers - General */

    pre.screen {
        overflow: auto;
        margin: 1em 0.5em;
        padding: 0.2em;
        border: solid 1px;
        font-family: monospace;
        white-space: pre;
    }

    div.screen {
        margin: 1em .5em;
        padding: 0.2em;
        border: solid 1px;
    }

    span.application {
        font-style: italic;
    }

    kbd.long {
        display: block;
        margin: 0.1em 1em;
    }

    kbd.command,
    code.command {
        white-space: pre;
    }

    code.filename {
        font-style: italic;
        white-space: nowrap;
    }

/* Code */

    code, pre {
        /* override IE6 default */
        font-size: 1em;
    }

    code {
        white-space: nowrap;
    }
    code.long {
        display: block;
        margin: 0.1em 1em;
        white-space: normal;
    }

    pre.code {
        overflow: auto;
        margin: 1em .5em;
        padding: .2em;
        border: solid 1px;
    }

    pre.code .remark {
        font-size: 1em;
        font-style: italic;
    }

    /* turn off content generation */
    pre.code .remark:before,
    pre.code .remark:after,
    pre.code .note:before {
        content: "";
    }


/* Examples and Figures */

    .example {
        margin: 1em 3%;
        padding: .25em;
        border: solid;
    }
    .example:before {
        display: block;
        font-weight: bold;
        content: "Example";
    }
    .example[title]:before {
        content: "Example: " attr(title);
    }

    pre.bad,
    div.bad {
        border: dashed red 3px;
    }
    .bad.example:before {
        content: "Incorrect Example";
    }
    .bad.example[title]:before {
        content: "Incorrect Example: " attr(title);
    }

    pre.good,
    div.good {
        border: double lime 3px;
    }
    .good.example:before {
        content: "Correct Example";
    }
    .good.example[title]:before {
        content: "Correct Example: " attr(title);
    }

    .figure,
    .screenshot {
        display: block;
        margin: .75em auto;
    }
    object.figure object,
    object.screenshot object,
    object.figure img,
    object.screenshot object {
        display: block;
        margin: 0 auto;
    }
    .screenshot[title]:after,
    .figure[title]:after {
        display: block;
        margin: 0 8% .05em;
        font-style: italic;
        font-size: small;
        text-align: right;
        content: attr(title);
    }

    .co,
    .callout {
        text-decoration: underline;
    }

/* Q and A (FAQ) */

    .qandaset .question {
        font-size: large;
        font-weight: bold;
    }

    .qandaset .answer {
        margin-top: 1em;
    }

/* Tables */

    table.data {
        border-collapse: collapse;
        margin: 0.5em auto;
        border: 1px solid;
    }

    table.data caption {
        margin: 1em auto 0.2em;
        font-size: small;
        font-style: italic;
        text-align: center;
    }

    table.data th,
    table.data td {
        padding: 0.2em;
        border: 1px solid;
        vertical-align: baseline;
    }

    table.data tbody th:first-child {
        text-align: right;
    }

    table.data thead th {
        vertical-align: middle;
    }

/* Meta */

    address {
        text-align: right;
    }
    .author {
        margin-bottom: 1em;
        text-align: left;
    }


/* Headers */

    #mainContent > h1:first-child,
    #mainContent > h2:first-child,
    #mainContent > h3:first-child,
    #mainContent > h4:first-child,
    #mainContent > h5:first-child,
    #mainContent > h6:first-child,
    #side > h1:first-child,
    #side > h2:first-child,
    #side > h3:first-child,
    #side > h4:first-child,
    #side > h5:first-child,
    #side > h6:first-child {
        margin-top: 0;
    }
    

/* Specific to Products Pages */

.productlist {
    margin: 0;
    padding: 0 0 0 5px;
}

.productlist li {
    clear: left;
    list-style: none;
    padding: 0 0 1em 0;
    margin-left: 0;
}

.productlist h3 {
    margin: 0 0 0.2em 0;
}

.productlist img {
    float: left;
    margin: 0 0.5em 1em 0;
}

/* Random Stuff That Needs To Be Cleaned Up / Deprecated */

.flLeft {
    float: left;
    margin: 5px 10px 5px 0;
}
.flRight {
    float: right;
    margin: 5px 0 5px 10px;
}

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