/*版心*/

.w1600 {
    width: 100%;
    position: relative;
    margin: 0 auto;
}

.w {
    width: 1280px;
    position: relative;
    margin: 0 auto;
}

.col-md-6 {
    width: 45%;
    float: left;
}

.col-md-5 {
    width: 49%;
    float: left;
}

.col-md-7 {
    width: 58%;
    float: left;
}

.col-md-12 {
    width: 100%;
    float: left;
}

.col-md-3 {
    width: 20%;
    float: left;
    position: relative;
}


/* 内外边距通常让各个浏览器样式的表现位置不同 */

body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
code,
form,
fieldset,
legend,
input,
textarea,
p,
blockquote,
th,
td,
hr,
button,
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    margin: 0;
    padding: 0;
}

button {
    border: 0;
    background-color: transparent;
    outline: none;
}

body,
html {
    width: 100%;
    height: 100%;
    min-width: 100%;
    min-height: 100%;
    background-color: #fff;
}


/* 要注意表单元素并不继承父级 font 的问题 */

body,
select,
textarea {
    font: 14px yahei, arial, sans-serif;
}

input,
select,
textarea {
    border: none;
}


/* 去掉 table cell 的边距并让其边重合 */

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


/* ie bug：th 不继承 text-align */

th {
    text-align: inherit;
}


/* 去除默认边框 */

fieldset,
img {
    border: none;
}


/* ie6 7 8(q) bug 显示为行内表现 */

iframe {
    display: block;
}


/* 去掉 firefox 下此元素的边框 */

abbr,
acronym {
    border: none;
    font-variant: normal;
}


/* 一致的 del 样式 */

del {
    text-decoration: line-through;
}

address,
caption,
cite,
code,
dfn,
em,
th,
var {
    font-style: normal;
    font-weight: 500;
}


/* 去掉列表前的标识，li 会继承 */

ol,
ul {
    list-style: none;
}


/* 对齐是排版最重要的因素，别让什么都居中 */

caption,
th {
    text-align: left;
}


/* 来自yahoo，让标题都自定义，适应多个系统应用 */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-size: 100%;
    font-weight: 500;
}

q:before,
q:after {
    content: '';
}


/* 统一上标和下标 */

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

sup {
    top: -0.5em;
}

sub {
    bottom: -0.25em;
}


/* 默认不显示下划线，保持页面简洁 */

ins,
a {
    text-decoration: none;
    color: inherit;
}


/* 去除 ie6 & ie7 焦点点状线 */

a:focus,
*:focus {
    outline: none;
}


/* 清除浮动 */

.clearfix:before,
.clearfix:after {
    content: "";
    display: table;
}

.clearfix:after {
    clear: both;
    overflow: hidden;
}

.clearfix {
    zoom: 1;
    /* for ie6 & ie7 */
}

.clear {
    clear: both;
    display: block;
    font-size: 0;
    height: 0;
    line-height: 0;
    overflow: hidden;
}


/* 设置浮动，减少浮动带来的 bug */

.fl {
    float: left;
}

.fr {
    float: right;
}