.page-introduce {
    padding: 80px 0 40px;
    overflow: hidden;
    background: #F8F8F8;
}
.page-introduce .page-main {
    width: 1200px;
    margin: 40px auto;
}

.introduce-left {
    float: left;
}
.introduce-left .left-ul {
    width: 200px;
    height: 400px;
    border-radius: 10px;
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    -ms-border-radius: 10px;
    -o-border-radius: 10px;
    overflow: hidden;
}

.introduce-left .left-ul .left-item {
    box-sizing: border-box;
    background: #ffffff;
    overflow: hidden;
    cursor: pointer;
    transition: background .2s linear;
    -webkit-transition: background .2s linear;
    -moz-transition: background .2s linear;
    -ms-transition: background .2s linear;
    -o-transition: background .2s linear;
}
.introduce-left .left-ul .left-item img {
    float: left;
    margin: 25px 30px;
    width: 30px;
    height: 30px;
}
.introduce-left .left-ul .left-item p {
    float: left;
    font-size: 20px;
    line-height: 80px;
}
.introduce-left .left-ul .left-item.on {
    background: #f0f0f0;
}
.introduce-left .left-ul .left-item:hover {
    background: #f0f0f0;
    transition: background .2s linear;
    -webkit-transition: background .2s linear;
    -moz-transition: background .2s linear;
    -ms-transition: background .2s linear;
    -o-transition: background .2s linear;
}
.introduce-left .left-ul .left-item:not(:last-child) {
    border-bottom: 1px solid #F8F8F8;
}


.introduce-right {
    float: right;
}
.introduce-right .right-pannel {
    right: 0;
    width: 970px;
    background: #fff;
    border-radius: 10px;
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    -ms-border-radius: 10px;
    -o-border-radius: 10px;
    padding: 0 40px;
    box-sizing: border-box;
    overflow: hidden;
}
.introduce-right .right-pannel .p-item {
    margin: 40px 0;
}
.introduce-right .right-pannel .p-item .p-title {
    overflow: hidden;
}
.introduce-right .right-pannel .p-item .p-title img {
    width: 30px;
    height: 30px;
    float: left;
}
.introduce-right .right-pannel .p-item .p-title p {
    font-size: 16px;
    float: left;
    line-height: 30px;
    margin-left: 20px;
}
.introduce-right .right-pannel .p-item .p-content {
    margin-left: 50px;
}
.introduce-right .right-pannel .p-item .p-content p {
    margin-top: 20px;
    color: #505050;
}