html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, font, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
}

body {
    line-height: 1;
    overflow-x: hidden;
}

ol, ul {
    list-style: none;
}

blockquote, q {
    quotes: none;
}

    blockquote:before, blockquote:after,
    q:before, q:after {
        content: '';
        content: none;
    }

/*demo CSS*/
img {
    max-width: 100%;
    max-height: 100%;
}

.main-content {
    width: 100%;
}

.title {
    margin: 20px 30px;
}

.image-list {
    width: 1200px;
    padding: 20px;
    text-align:left;
}

    .image-list .cover {
        position: relative;
        width: 160px;
        height: 230px;
        display: inline-block;
        margin-left: 10px;
        margin-bottom: 10px;
        background-color: #fff;
        cursor: pointer;
    }

        .image-list .cover img {
            position: absolute;
            margin: auto;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
        }

/*main CSS*/
#pictureViewer {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    background-color: rgba(0,0,0,.3);
    z-index: 10000;
}

    #pictureViewer > .content {
        background-color: #fff;
        position: absolute;
        width: 590px;
        height: 590px;
        margin: auto;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
    }

    #pictureViewer .menu-bar {
        width: 100%;
    }

        #pictureViewer .menu-bar .handel {
            width: 40px;
            height: 40px;
            float: right;
            background-repeat: no-repeat;
            background-position: 50%;
            cursor: pointer;
        }

            #pictureViewer .menu-bar .handel:hover {
                background-color: #ff2e67;
                -webkit-transition: all .3s;
                -moz-transition: all .3s;
                -ms-transition: all .3s;
                -o-transition: all .3s;
                transition: all .3s;
            }

            #pictureViewer .menu-bar .handel.maximization {
                background-image: url(/images/gk/maximization_black.png);
                background-size: 14px;
            }

                #pictureViewer .menu-bar .handel.maximization:hover {
                    background-image: url(/images/gk/maximization_white.png);
                }

            #pictureViewer .menu-bar .handel.miniaturization {
                background-size: 16px;
                background-image: url(/images/gk/miniaturization_black.png);
            }

                #pictureViewer .menu-bar .handel.miniaturization:hover {
                    background-image: url(/images/gk/miniaturization_white.png);
                }

            #pictureViewer .menu-bar .handel.close-view {
                background-image: url(/images/gk/close_black.png);
                background-size: 15px;
            }

                #pictureViewer .menu-bar .handel.close-view:hover {
                    background-image: url(/images/gk/close_white.png);
                }

    #pictureViewer .handel-prev,
    #pictureViewer .handel-next {
        display: inline-block;
        width: 50px;
        height: 70px;
        position: relative;
        top: calc(50% - 80px);
        background-repeat: no-repeat;
        background-size: 25px;
        background-position: 50%;
        cursor: pointer;
        -webkit-transition: all .3s;
        -moz-transition: all .3s;
        -ms-transition: all .3s;
        -o-transition: all .3s;
        transition: all .3s;
    }

    #pictureViewer .handel-prev {
        background-image: url(/images/gk/prev_blank.png);
    }

    #pictureViewer .handel-next {
        background-image: url(/images/gk/next_blank.png);
    }

        #pictureViewer .handel-prev:hover,
        #pictureViewer .handel-next:hover {
            background-color: #ff2e67;
        }

    #pictureViewer .handel-prev:hover {
        background-image: url(/images/gk/prev_white.png);
    }

    #pictureViewer .handel-next:hover {
        background-image: url(/images/gk/next_white.png);
    }

    #pictureViewer .picture-content {
        display: inline-block;
        width: 80%;
        height: calc(100% - 80px);
        position: absolute;
        margin: 0 auto;
        left: 0;
        right: 0;
    }

        #pictureViewer .picture-content .cover {
            position: absolute;
            margin: auto;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
        }

    #pictureViewer .counter {
        position: absolute;
        bottom: 0;
        height: 40px;
        line-height: 40px;
        width: 100%;
        text-align: center;
        color: #808080;
        font-size: 13px;
    }

    #pictureViewer .hide {
        display: none;
    }

    #pictureViewer .left {
        float: left;
    }

    #pictureViewer .right {
        float: right;
    }

    #pictureViewer .clear-flex {
        clear: both;
    }

    #pictureViewer img {
        max-width: 100%;
        max-height: 100%;
    }