a, address, b, big, blockquote, body, center, cite, code, dd, del, div, dl, dt, em, fieldset, font, form, h1, h2, h3, h4, h5, h6, html, i, iframe, img, ins, label, legend, li, ol, p, pre, small, span, strong, u, ul, var
{
    margin: 0;  padding: 0;
}

a {  text-decoration: none;  }

li {  list-style: none;  }

.about_us_banner
{
    width: 100%;
    height: 540px;
    background: url("../images/about_us_image/about_us_banner.png") no-repeat center;
}

.about_us_middle_nav
{
    width: 100%;
    margin-bottom: 15px;

}

.middle_nav_div
{
    width: 1200px;
    height: 70px;
    margin: auto;
    border-bottom: 1px solid #e5e5e5;
    font-family: "Microsoft YaHei",Tahoma, Arial;
    font-size: 16px;
    font-weight: 400;
}

.nav_list_item
{
    float: left;
    margin: 0 20px;
    color: #999;
    padding: 0 10px;
    height: 68px;
    line-height: 68px;
    display: inline-block;
}

.nav_list_item:hover
{
    cursor: pointer;
    border-bottom: 2px solid #00b7ee;
    color: #00b7ee;
}

.selected_nav_item
{
    color: #00b7ee;
    border-bottom: 2px solid #00b7ee;
}

.about_us_content
{
    width: 1200px;
    margin: auto;
    font-family: "Microsoft YaHei",Tahoma, Arial;
    font-size: 15px;
    font-weight: 400;
    color: #aaa;
    padding-bottom: 50px;
}

.company_introduce
{
    margin-bottom: 50px;
}

.introduce_item
{
    margin: 15px 0;
}

.introduce_item img
{
    margin-top: 8px;
    vertical-align: top;
}

.introduce_item div
{
    display: inline-block;
    width: 1150px;
    margin-left: 15px;
}

/*发展历史*/
.develop_hository
{
    position: relative;
    margin: 0 0 50px 150px;
    display: none;
}

.develop_history_list
{
    position: absolute;
    left: 60px;
    top: 95px;
}

.history_item
{
    margin: 5px;
    margin-bottom: 88px;
}

/*企业文化*/
.enterprise_cultrue
{
    display: none;
    width: 100%;
    height: 540px;
    margin-bottom: 50px;
    background: url("../images/about_us_image/culture.png")no-repeat center;
    margin-top: -30px;
}

/*服务条款*/
.company_rules
{
    display: none;
}

.rules_h3
{
    margin: 10px 0;
}

.rule_statement
{
    margin-bottom: 15px;
}

.order_number
{
    vertical-align: top;
    margin-top: 8px;
}

.rule_piece
{
    display: inline-block;
    width: 1100px;
    margin-left: 10px;
    margin-bottom: 15px;
}

#vanvy
{
    margin-bottom: 50px;
}

.contact_us p
{
    line-height: 30px;
    height: 30px;
    font-family: "Microsoft YaHei",Tahoma, Arial;
    font-size: 15px;
}