a {
    text-decoration: none;
    cursor: pointer;
    color: #666;
}
.sideMen>ul .on {
    color: #b20707;
}
.sideMen>ul a {
    font-size: 12px;
    height: 35px;
    line-height: 35px;
    color: #999999;
}
.about-ul li a {
    display: block;
    color: #555555;
}

.about-main {
    width: 1180px;
    margin:40px auto;
    overflow: hidden;
}

.about-nav {
    width: 210px;
    float: left;
}.about-content {
    width: 950px;
    float: right;
}.nav-list {
    box-shadow: 0px 0px 4px 1px rgba(0,0,0,.15);
    margin-bottom: 20px;
}.nav-top {
    background: #fff;
    padding: 30px 0;
    text-align: center;
    border-bottom: 1px #e0e0e0 dotted;
}.about-ul {
    text-align: center;
    background: #fff;
    padding-bottom: 25px;
}.help-icon {
    background-position: 0px -82px;
}
.nav-icon {
    display: inline-block;
    width: 48px;
    height: 48px;
    background-image: url(../images/help.png);
    margin-top: 25px;
        background-repeat: no-repeat;    background-position-y: 0px;
}
.nav-top>p {
    font-size: 20px;
    color: #555555;    margin-top: 10px;
}

.sideMen h3 {
    font-size: 14px;
    height: 44px;
    line-height: 44px;
    color: #555;
    position: relative;
    cursor: pointer;
}

.sideMen h3 em {
    cursor: pointer;
    width: 8px;
    height: 8px;
    background: url(../images/2.jpg) no-repeat;
    display: inline-block;
    position: relative;
    right: 5px;
    top: -1px;
}
.sideMen>ul {
    display: block;
}

.about-ul li {
    display: block;
    line-height: 44px;
}


.sideMen>ul a {
    font-size: 12px;
    height: 35px;
    line-height: 35px;
    color: #999;
}
.help-box {
    background: #fff;
    padding: 0 15px;
        min-height: 500px;
}
.about-title {
    padding-top: 10px;
    line-height: 42px;
    font-size: 16px;
    border-bottom: 1px #e5e5e5 solid;
    padding-left: 5px;
}
.about-txt {
    padding: 30px 0;
}
.about-txt>p {
    line-height: 30px;
    text-indent: 2em;
    color: #555;
}

.about-txt img {
border:dashed 1px #d0d0d0;
}