* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    position: relative;
    user-select: none;
}
.hide{
    display: none;
}
#page_preview_box {
    background: #000;
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
}
#page_preview_box .close {
    position: absolute;
    width: 8%;
    right: 3%;
    top: 2%;
    z-index: 3
}

#page_preview_box .preview_pic_box {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    justify-content: center;
    align-items: center
}

#page_preview_box .preview_pic {
    width: 100%;
    position: relative;
    margin: auto;
    display: block;
    left: 0;
    top: 0;
    transform-origin: 50% 50%;
    height: auto
}

#page_preview_box .left_arr {
    width: 30px;
    height: 60px;
    background: rgba(0,0,0,.6);
    position: fixed;
    left: 20px;
    top: 50%;
    margin-top: -30px;
    line-height: 60px;
    z-index: 9
}

#page_preview_box .left_arr img {
    width: 26px;
    vertical-align: middle
}

#page_preview_box .right_arr {
    width: 30px;
    height: 60px;
    background: rgba(0,0,0,.6);
    position: fixed;
    right: 20px;
    top: 50%;
    margin-top: -30px;
    line-height: 60px;
    z-index: 9
}

#page_preview_box .right_arr img {
    width: 26px;
    vertical-align: middle;
    transform: rotateZ(180deg)
}

#page_preview_box .pic_page_info {
    color: #f3f3f3;
    position: fixed;
    bottom: 30px;
    text-align: center;
    width: 50px;
    z-index: 3;
    background: rgba(0,0,0,.6);
    left: 50%;
    margin-left: -25px;
    box-sizing: border-box
}