CSS
/* Reset CSS - 通用浏览器样式重置 */
/* 整合 Eric Meyer/YUI/网易 NEC 方案，适配现代开发需求 */

/* 基础元素重置 */
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}

/* HTML5 元素兼容 */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    display: block;
}

/* 统一盒模型 */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* 列表样式清除 */
ol,
ul {
    list-style: none;
}

/* 表格重置 */
table {
    border-collapse: collapse;
    border-spacing: 0;
}

/* 图片和链接 */
img {
    width: 100%;
    height: 100%;
    display: block;
}
a {
    text-decoration: none;
    color: inherit;
}

/* 表单元素统一 */
button,
input,
optgroup,
select,
textarea {
    margin: 0;
    padding: 0;
    font-family: inherit;
    font-size: 100%;
    line-height: inherit;
    color: inherit;
}
button {
    background: none;
    border: none;
    cursor: pointer;
}

/* 清除默认点击高光 */
:focus {
    outline: 0;
}

/* 文本排版基础 */
body {
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 清除浮动 */
.clearfix::after {
    content: "";
    display: table;
    clear: both;
}