/**
 * Prevent `sub` and `sup` affecting `line-height` in all browsers.
 */

sub,sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sup {
  top: -0.5em;
}

sub {
  bottom: -0.25em;
}

使用浏览器默认的vertical-align：sup / sub有什么问题？

或者换句话说,为什么不简单地声明sub,sup {line-height：0;而不是？

normalize.css makes browsers render all elements more consistently and
in line with modern standards. It precisely targets only the styles
that need normalizing.

从此语句中获取的主要关键字是“始终如一”.

在这些屏幕截图中,顶行具有行高：0和字体大小：对于sub和sup为75％.底线具有标准化CSS,并且在浏览器之间更加一致.

IE6

IE8

IE11

Chrome – 现代浏览器中的差异并不大.

这些差异很小,但规范化的CSS在浏览器之间提供了更加一致的外观,包括IE6.使用position：relative实现了这种一致性.

这就是我用于截图的内容

此外,作为jsBin example. IE截图采用插入netrenderer.com的jsbin链接

body {
  background: #CCC;
}

p {
  background: #F00;
}









/*! normalize.css v3.0.2 | MIT License | git.io/normalize */

/**
 * 1. Set default font family to sans-serif.
 * 2. Prevent iOS text size adjust after orientation change,without disabling
 *    user zoom.
 */

html {
  font-family: sans-serif; /* 1 */
  -ms-text-size-adjust: 100%; /* 2 */
  -webkit-text-size-adjust: 100%; /* 2 */
}

/**
 * Remove default margin.
 */

body {
  margin: 0;
}

/* HTML5 display deFinitions
   ========================================================================== */

/**
 * Correct `block` display not defined for any HTML5 element in IE 8/9.
 * Correct `block` display not defined for `details` or `summary` in IE 10/11
 * and Firefox.
 * Correct `block` display not defined for `main` in IE 11.
 */

article,aside,details,figcaption,figure,footer,header,hgroup,main,menu,nav,section,summary {
  display: block;
}

/**
 * 1. Correct `inline-block` display not defined in IE 8/9.
 * 2. normalize vertical alignment of `progress` in Chrome,Firefox,and Opera.
 */

audio,canvas,progress,video {
  display: inline-block; /* 1 */
  vertical-align: baseline; /* 2 */
}

/**
 * Prevent modern browsers from displaying `audio` without controls.
 * Remove excess height in iOS 5 devices.
 */

audio:not([controls]) {
  display: none;
  height: 0;
}

/**
 * Address `[hidden]` styling not present in IE 8/9/10.
 * Hide the `template` element in IE 8/9/11,Safari,and Firefox < 22.
 */

[hidden],template {
  display: none;
}

/* Links
   ========================================================================== */

/**
 * Remove the gray background color from active links in IE 10.
 */

a {
  background-color: transparent;
}

/**
 * Improve readability when focused and also mouse hovered in all browsers.
 */

a:active,a:hover {
  outline: 0;
}

/* Text-level semantics
   ========================================================================== */

/**
 * Address styling not present in IE 8/9/10/11,and Chrome.
 */

abbr[title] {
  border-bottom: 1px dotted;
}

/**
 * Address style set to `bolder` in Firefox 4+,and Chrome.
 */

b,strong {
  font-weight: bold;
}

/**
 * Address styling not present in Safari and Chrome.
 */

dfn {
  font-style: italic;
}

/**
 * Address variable `h1` font-size and margin within `section` and `article`
 * contexts in Firefox 4+,and Chrome.
 */

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

/**
 * Address styling not present in IE 8/9.
 */

mark {
  background: #ff0;
  color: #000;
}

/**
 * Address inconsistent and variable font size in all browsers.
 */

small {
  font-size: 80%;
}



/* Embedded content
   ========================================================================== */

/**
 * Remove border when inside `a` element in IE 8/9/10.
 */

img {
  border: 0;
}

/**
 * Correct overflow not hidden in IE 9/10/11.
 */

svg:not(:root) {
  overflow: hidden;
}

/* Grouping content
   ========================================================================== */

/**
 * Address margin not present in IE 8/9 and Safari.
 */

figure {
  margin: 1em 40px;
}

/**
 * Address differences between Firefox and other browsers.
 */

hr {
  -moz-Box-sizing: content-Box;
  Box-sizing: content-Box;
  height: 0;
}

/**
 * Contain overflow in all browsers.
 */

pre {
  overflow: auto;
}

/**
 * Address odd `em`-unit font size rendering in all browsers.
 */

code,kbd,pre,samp {
  font-family: monospace,monospace;
  font-size: 1em;
}

/* Forms
   ========================================================================== */

/**
 * KNown limitation: by default,Chrome and Safari on OS X allow very limited
 * styling of `select`,unless a `border` property is set.
 */

/**
 * 1. Correct color not being inherited.
 *    KNown issue: affects color of disabled elements.
 * 2. Correct font properties not being inherited.
 * 3. Address margins set differently in Firefox 4+,and Chrome.
 */

button,input,optgroup,select,textarea {
  color: inherit; /* 1 */
  font: inherit; /* 2 */
  margin: 0; /* 3 */
}

/**
 * Address `overflow` set to `hidden` in IE 8/9/10/11.
 */

button {
  overflow: visible;
}

/**
 * Address inconsistent `text-transform` inheritance for `button` and `select`.
 * All other form control elements do not inherit `text-transform` values.
 * Correct `button` style inheritance in Firefox,IE 8/9/10/11,and Opera.
 * Correct `select` style inheritance in Firefox.
 */

button,select {
  text-transform: none;
}

/**
 * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
 *    and `video` controls.
 * 2. Correct inability to style clickable `input` types in iOS.
 * 3. Improve usability and consistency of cursor style between image-type
 *    `input` and others.
 */

button,html input[type="button"],/* 1 */
input[type="reset"],input[type="submit"] {
  -webkit-appearance: button; /* 2 */
  cursor: pointer; /* 3 */
}

/**
 * Re-set default cursor for disabled elements.
 */

button[disabled],html input[disabled] {
  cursor: default;
}

/**
 * Remove inner padding and border in Firefox 4+.
 */

button::-moz-focus-inner,input::-moz-focus-inner {
  border: 0;
  padding: 0;
}

/**
 * Address Firefox 4+ setting `line-height` on `input` using `!important` in
 * the UA stylesheet.
 */

input {
  line-height: normal;
}

/**
 * It's recommended that you don't attempt to style these elements.
 * Firefox's implementation doesn't respect Box-sizing,padding,or width.
 *
 * 1. Address Box sizing set to `content-Box` in IE 8/9/10.
 * 2. Remove excess padding in IE 8/9/10.
 */

input[type="checkBox"],input[type="radio"] {
  Box-sizing: border-Box; /* 1 */
  padding: 0; /* 2 */
}

/**
 * Fix the cursor style for Chrome's increment/decrement buttons. For certain
 * `font-size` values of the `input`,it causes the cursor style of the
 * decrement button to change from `default` to `text`.
 */

input[type="number"]::-webkit-inner-spin-button,input[type="number"]::-webkit-outer-spin-button {
  height: auto;
}

/**
 * 1. Address `appearance` set to `searchfield` in Safari and Chrome.
 * 2. Address `Box-sizing` set to `border-Box` in Safari and Chrome
 *    (include `-moz` to future-proof).
 */

input[type="search"] {
  -webkit-appearance: textfield; /* 1 */
  -moz-Box-sizing: content-Box;
  -webkit-Box-sizing: content-Box; /* 2 */
  Box-sizing: content-Box;
}

/**
 * Remove inner padding and search cancel button in Safari and Chrome on OS X.
 * Safari (but not Chrome) clips the cancel button when the search input has
 * padding (and `textfield` appearance).
 */

input[type="search"]::-webkit-search-cancel-button,input[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}

/**
 * Define consistent border,margin,and padding.
 */

fieldset {
  border: 1px solid #c0c0c0;
  margin: 0 2px;
  padding: 0.35em 0.625em 0.75em;
}

/**
 * 1. Correct `color` not being inherited in IE 8/9/10/11.
 * 2. Remove padding so people aren't caught out if they zero out fieldsets.
 */

legend {
  border: 0; /* 1 */
  padding: 0; /* 2 */
}

/**
 * Remove default vertical scrollbar in IE 8/9/10/11.
 */

textarea {
  overflow: auto;
}

/**
 * Don't inherit the `font-weight` (applied by a rule above).
 * NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
 */

optgroup {
  font-weight: bold;
}

/* Tables
   ========================================================================== */

/**
 * Remove most spacing between table cells.
 */

table {
  border-collapse: collapse;
  border-spacing: 0;
}

td,th {
  padding: 0;
}


.line0 sub,.line0 sup { line-height: 0; font-size: 75%;}

.normalize sub,.normalize sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

.normalize sup {
  top: -0.5em;
}

.normalize sub {
  bottom: -0.25em;
}

<p>Hello <sub>there,</sub> How<sup>are you?</sup>
</p>

<phttps://www.jb51.cc/tag/nor/" target="_blank">normalize">Hello <sub>there,</sub> How<sup>are you?</sup>
</p>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
    <title>Document</title>
    <style type="text/css">
        *{
            margin: 0;
            padding: 0;
        }
        p{
            width: 300px;
            height: 40px;
            font-family: "宋体";
            border: 2px solid red;
            color: blue;
            font-size: 26px;
            line-height: 28px;
        }
    </style>
</head>
<body>
    <p>这是一段文字</p>
</body>
</html>

http://jsfiddle.net/jmQfr/

<div><label for="ReportFruit">Fruit</label>
        <input type="hidden" name="data[Report][Fruit]" value="" id="ReportFruit" /> 

<divhttps://www.jb51.cc/tag/Box/" target="_blank">Box"><input type="checkBox" name="data[Report][Fruit][]" value="0" id="ReportFruit0" /><label for="ReportFruit0">Banana</label></div> 
<divhttps://www.jb51.cc/tag/Box/" target="_blank">Box"><input type="checkBox" name="data[Report][Fruit][]" value="1" id="ReportFruit1" /><label for="ReportFruit1">Apple</label></div> 
<divhttps://www.jb51.cc/tag/Box/" target="_blank">Box"><input type="checkBox" name="data[Report][Fruit][]" value="2" id="ReportFruit2" /><label for="ReportFruit2">Pear</label>
...
</div> 
</div>​

这会以这种格式生成一堆复选框：

[] Banana
[] Apple
[] Pear
[] ...

我想格式化它们,所以它们显示如下：
(理想情况下,我仍然可以设置每行的选项数量,但如果不是这样也可以)

[] Banana    [] Apple     [] Pear
[] Mango     [] Lemon     [] ...

我可以使用CSS完成此操作,还是必须使用JS操作DOM(或者在输出之前用PHP更改标记)？

div.checkBox { float: left; width: 31%; margin-right: 1% }

(1％用于舍入问题;根据需要减小宽度并增加边距权限.当然,您也可以使用Pixel值)

这会将复选框及其标签分布在三列中.但是,如果长标签包含多行,您可能会遇到分发问题(尝试看看我的意思).

为了防止这种情况,请为每个第3列提供额外的类换行符：

<divhttps://www.jb51.cc/tag/Box/" target="_blank">Box newline">

并在CSS中定义：

div.checkBox.newline { clear: left }