*{
    box-sizing: border-box;
}
ul,li{
    margin: 0;
    padding: 0;
}

.content_body{
    min-height: 1000px;
    height: auto;
    /*position: relative;*/
    /*top:80px;*/
    margin-top: 100px;
}

.content_body_center{
    margin: 0 auto;
    width: 1500px;
    height: auto;
    /*position: relative;*/
}

/*#00a0e9*/
.tutorial_title{
    background-color: #96b97d;
    width: 1500px;
    height: 50px;
    position:fixed;
    top: 80px;
    /*float: left;*/
    left: 50%;
    margin-left: -750px;
    text-align: center;
    line-height: 50px;
    border:1px solid #000;
    border-top:none;
}

.tutorial_title ul li{
    color: #ffffff;
    display: inline-block;
    margin-left: 50px;
    height: 40px;
}
.tutorial_title ul li:first-child{
    border-bottom: 1px solid #ffffff;
}
.tutorial_title ul li:hover{
    cursor: pointer;

}

.sndeveloper_introduce{
    width: 1500px;
    min-height: 800px;
    margin-top: 150px;
    background-color: #eeeee0;
}
.sndeveloper_introduce_title p,.sndeveloper_interface_use_tutorial_title p{
    background-color: #cccccc;
    height: 50px;
    line-height: 50px;
    text-align: center;
    font-size: 20px;
}

.sndeveloper_introduce_content,.sndeveloper_interface_use_tutorial_content{
    padding-top: 20px;
    padding-bottom: 20px;
}
.sndeveloper_interface_use_tutorial_content p{
    /*text-align: center;*/
    margin-top: 20px;
    margin-bottom: 20px;
}
/*interface_part_img*/
/*.sndeveloper_interface_use_tutorial_content .interface_part_content{*/
    /*text-align: left;*/
    /*margin-top: 20px;*/
    /*margin-bottom: 20px;*/
    /*margin-left: 50px;*/
/*}*/
.sndeveloper_interface_use_tutorial_content p img{
    max-width: 1350px;
}

.sndeveloper_introduce .sndeveloper_introduce_content p{
    text-align: center;
    margin-top: 20px;
    margin-bottom: 20px;
}
.sndeveloper_interface_use_tutorial{
    width: 1500px;
    min-height: 800px;
    margin-top: 150px;
    background-color: #eeeee0;
}
/*.sndeveloper_logic_use_tutorial{*/
    /**/
/*}*/

.left_nav{
    width:250px;
    position: fixed;
    top:200px;
    /*left:200px;*/
    bottom: 10px;
    float: left;
    border: 1px solid #aaaaaa;
    /*background-color: ;*/
    /*box-sizing: inherit;*/
    overflow-y: scroll;
}

.left_nav .first_menu_item {
    text-align: center;
    min-height: 40px;
    line-height: 40px;
    border-bottom: 1px solid #CCCCCC;
    background-color: #aaaaaa;
    color: #000;
}

.content_body_center h5{
    border-bottom: 2px solid #000;
    font-weight: bold;
    height: 50px;
    text-align: center;
    line-height: 50px;
    font-size: 18px;
    background-color: #0a0a0a;
    color:#ffffff;
    width: 250px;
    /*margin-left: 15px;*/
    position: fixed;
    top:150px;
    /*left:200px;*/
}

/*.left_nav .first_ul{*/
    /*min-height: 800px;*/
    /*!*overflow-y: scroll;*!*/
/*}*/

.first_menu_item ul li {
    text-align: left;
    min-height: 40px;
    line-height: 40px;
    border-top: 1px solid #dddddd;
    background-color: #ffffff;
    color: #000;
}

.first_menu_item p:hover{
    background-color: #cccccc;
    cursor: pointer;
}

.hide{
    display: none;
}

.content_page{
    /*position: fixed;*/
    /*top:120px;*/
    /*left:450px;*/
    /*bottom:0;*/
    min-height:1000px;
    float: right;
    width: 1200px;
    height: auto;
    border:1px solid #aaaaaa;
    padding-bottom: 50px;
    margin-left: 100px;
    margin-top: 50px;
    background-color: #eeeee0;
    /*overflow-y: scroll;*/
}

.content_page .logic_title{
    text-align: center;
    height: 50px;
    background-color: #cccccc;
    line-height: 50px;
    /*color:#fff;*/
}

/*.content_page .logiv_content{*/
    /*!*background-color: #eeeee0;*!*/
    /*max-height: 800px;*/
    /*overflow-y: scroll;*/

/*}*/

.content_page .desc_title{
    margin-top: 20px;
    margin-left: 20px;
    font-weight: bold;
    font-size: 24px;
}
.content_page .logic_desc{
    margin-top: 20px;
    margin-left: 50px;
}
.content_page .logic_img,.content_page .logic_pra_img{
    margin-left: 80px;
    margin-top: 20px;

}
.content_page .logic_pra_img img{

    max-width: 1000px;
}
.first_menu_item ul li:hover{
    cursor: pointer;
}
.content_page table{
    margin-top: 20px;
    margin-left: 50px;
}
.content_page table td:first-child,.content_page table td:nth-child(2){
    width: 200px;
    text-align: center;
}
.content_page table td:nth-child(3){
    width: 500px;
    text-align: center;
}
.content_page .filed_name{
    background: linear-gradient(#eee, #ddd);
    height:30px ;
}

.content_page .data_row{
    height:30px ;
}
table, th, td{
    border: 1px solid black;
    border-collapse: collapse;
}