body {
    margin: 0;
    color: #aaa;
    font: 12px/21px simsun;
}
* {
    word-wrap: break-word;
    word-spacing: normal;
}
.head {
    width: 970px;
    margin: 0 auto;
    padding: 20px 0 25px;
}
.logo {
    font: 16px/24px ;
    color: #000;
}
div, ul, dl {
    zoom: 1;
}
.head_link {
    float: right;
    margin-top: -21px;
    line-height: 21px;
    color: #3498DB;
    text-decoration:none;
}
.mainC3 {
    color: #000;
}
.main {
    width: 970px;
    margin: 0 auto;
}
h1 {
    display: block;
    font-size: 2em;
    margin-block-start: 0.67em;
    margin-block-end: 0.67em;
    margin-inline-start: 0px;
    margin-inline-end: 0px;
    font-weight: bold;
}
.mainC3 h1 {
    font: 18px/30px;
    border-bottom: 1px solid #e6e6e6;
    margin: 55px 0 45px;
}
.mainC3 p {
    margin: 0 20px;
}
p {
    display: block;
    margin-block-start: 1em;
    margin-block-end: 1em;
    margin-inline-start: 0px;
    margin-inline-end: 0px;
}
.btn {
    background-position: 0 -80px;
    display: inline-block;
    padding: 0 20px;
    line-height: 25px;
    border: 1px solid #d4d4d4;
    color: #000;
    text-decoration:none;
}
.btnBg {
    background: url(//www.shareteches.com/newweb/web/login.aspx)
    -500px 0 no-repeat;
}
.mainC3 .pbtn {
    padding: 50px;
    text-align: center;
}