body {
    overflow-x: hidden;
}
img {
  border: 0;
}

html,
body,
ol,
dl,
dd,
dt,
p,
h1,
h2,
h3,
h4,
h5,
h6,
form,
fieldset,
legend,
img {
  margin: 0;
  padding: 0;
}
a:hover,
a:active,
a:focus,
a:visited {
  text-decoration: underline;
  text-decoration: none;
}
.header .back_box {
    position: relative;
    width: 100%;
    background: url(../images/header-back.jpg) center no-repeat;
    background-size: cover;
}

.header .back_box .return {
    width: 1200px;
    height: 180px;
    margin: 0 auto;
    z-index: 2;
}

.header .back_box .return a {
    margin-top: 10px;
    float: right;
    margin-right: 0px;
}

.header .nav {
    width: 100%;
    background-color: #34599f;
}

.header ul {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
}

.header ul li a {
    display: block;
    width: 150px;
    height: 75px;
    line-height: 75px;
    color: white;
    font-size: 18px;
    text-align: center;
}

.header ul li a:hover {
    background-color: #244585;
}

.main {
    width: 100%;
    
    background-size: cover;
}

.main_box {
    width: 1200px;
    margin: 0 auto;
}

.main_box h2 {
    height: 53px;
    font-size: 12px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: #222222;
    line-height: 53px;
    opacity: 0.5;
}

.main_box h2 span {
    font-size: 14px;
}

.footer {
    width: 100%;
    height: 100px;
}

.footer_box {
    width: 1200px;
    display: flex;
    justify-content: center;
    margin: 0 auto;
    padding: 30px 0;
}

.footer_box img {
    margin-right: 75px;
}

.footer_box p {
    width: 504px;
    height: 43px;
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: #333333;
    line-height: 26px;
    text-align: center;
}

.footer_box p a {
    color: #333;
}

* {
    list-style: none;
}

body {
    background: #fff;
    font: normal 12px/22px;
}

img {
    border: 0;
}

a {
    text-decoration: none;
    color: #333;
}

a:hover {
    color: #1974a1;
}

/* links */
.links {width:100%; background-color:#5E5E5E; float:left;}
.links1000 {width:1000px; margin:0 auto; height:93px;}
.links-tit {float:left; width:162px;}
.links-tit li img {margin:18px 33px 48px 33px;}
.links-text {float:left; width:838px; margin-top:18px;}
.links-text li {float:left; width:auto; margin-right:18px;}
.links-text li a {color:#FFFFFF;}
/* links end */