.wx_box {
        position: fixed;
        /*top: 450px;*/
        bottom:35px;
        right: 10px;

    }

    .weixin a {
        width: 32px;
        height: 260px;
        display: block;
        background: url(/Content/images/bbs.jpg) no-repeat center top;
    }

    .weixin {
        position: relative;
        font-size: 12px;
        text-align: center;
    }

        .weixin .weixin_nr {
            width: 150px;
            height: 150px;
            padding: 10px;
            background: #fff;
            border: solid 1px #ccc;
            text-align: center;
            position: absolute;
            right: 35px;
            top: 25px;
            display: none;
        }

            .weixin .weixin_nr .arrow {
                width: 0;
                height: 0;
                border-bottom: 10px solid #fff;
                border-top: 10px solid transparent;
                border-bottom: 10px solid transparent;
                position: absolute;
                left: 50px;
                top: -10px;
            }

        .weixin.on .weixin_nr {
            display: block;
        }