                        padding: 10,
                        backgroundColor: '#222',
                        borderColor: '#777',
                        borderWidth: 1,
                        formatter: function (obj) {
                            var value = obj.value;
                            return '<div style="border-bottom: 1px solid rgba(255,255,255,.3); font-size: 18px;padding-bottom: 7px;margin-bottom: 7px">'
                                + obj.seriesName + ' ' + value[0] + '日：'
        