/* layout */
* {
    margin: 0;
    padding: 0;
}

header {
    position: absolute;
    width: 100%;
    height: 12%;
    text-align: center;
    background-color: #2980b9;
}

.main {
    position: absolute;
    width: 100%;
    height: 88%;
    background: #3498db;
    bottom: 0;
}

.main:after {
    content: "";
    display: block;
    clear: both;
}

.main .manipulation {
    height: 100%;
    width: 20%;
    float: left;
    background: #2980b9;
}

.main .display {
    height: 100%;
    width: 80%;
    float: left;
    background: #3498db;
}

#font_piggy {
    color: #ecf0f1;
    font-family: "宋体", serif;
    font-size: larger;
}


/* header */
header h1 {
    color: #ecf0f1;
    font-weight: bold;
    font-family: "宋体", serif;
    line-height: 100px;
}


/* manipulation */
.manipulation .model_select {
    margin: 35px 30px;
}

.manipulation .image_load {
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    position: absolute;
    z-index: -1;
}






/* display */
.display .return {
    margin: 30px 20px;
}

.display .return:after {
    content: "";
    display: table;
    clear: both;
}

.display .pictures_exhibit {
    padding: 10px 15px;
    height: 420px;
    width: 100%;
    background: #ecf0f1;
}

.display .pictures_exhibit:after {
    content: "";
    display: table;
    clear: both;
}

.display .pictures_exhibit .picture_l {
    float: left;
    height: 100%;
    width: 550px;
    background: #bdc3c7;
}

.display .pictures_exhibit .picture_r {
    float: right;
    height: 100%;
    width: 550px;
    background: #bdc3c7;
}

.display .generation {
    margin: 30px 30px;
}

.display .generation:after {
    content: "";
    display: table;
    clear: both;
}

