@import 'jquery.timepicker.min.css';@import 'mathquill.min.css';.mathquill-rendered-math .numerator{margin-bottom:0px}
body{margin:0;font-family:arial;font-size:1rem;font-weight:400;line-height:1.5;color:#3a4353;text-align:left;background-color:#fff}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5rem}.h1,.h2,.h3,.h4,.h5,.h6,h1,h2,h3,h4,h5,h6{margin-bottom:.5rem;font-weight:700;line-height:1.4}.h1,h1{font-size:2rem}.h2,h2{font-size:1.5rem}.h3,h3{font-size:1.3125rem}p{margin-top:0;margin-bottom:1rem}ul{margin-top:0;margin-bottom:1rem}li,ul{list-style:none;padding:0}a{text-decoration:none!important;color:#000}#_bt_helps,.bt_show_hd::after,.chestnut_i,.icon-bt,.m_icon{background-image:url(/file/common/baitap/image/m_icon.png)}.m-f-info{background-color:#232b35;padding:4vw;color:#fff}.m-fi-domain-1{color:#ff0}.m-fi-row .m-f-orange{color:#f08421}.navigation_tree{display:none}.t_scr{color:#fff}.m-cat-name-red{background-color:#dc5856;color:#fff;text-transform:uppercase;padding:6px 3%;font-size:28px}.animated{-webkit-animation-duration:.5s;animation-duration:.5s;-webkit-animation-fill-mode:both;animation-fill-mode:both}@-webkit-keyframes slideInDown{from{-webkit-transform:translate3d(0,-100%,0);transform:translate3d(0,-100%,0);visibility:visible}to{-webkit-transform:translate3d(0,0,0);transform:translate3d(0,0,0)}}@keyframes slideInDown{from{-webkit-transform:translate3d(0,-100%,0);transform:translate3d(0,-100%,0);visibility:visible}to{-webkit-transform:translate3d(0,0,0);transform:translate3d(0,0,0)}}.slideInDown{-webkit-animation-name:slideInDown;animation-name:slideInDown}.lt123_box_gopy{background:#fff;box-shadow:1px 2px 10px #525a5f;border:1px dashed #00bcd4;top:127px;height:480px;right:10px;position:absolute;width:90%;z-index:9999}.lt123_gopy_title{cursor:move;font-size:22px;color:#3493bc;background-repeat:no-repeat;border-bottom:1px solid #d4d3d1;height:45px;margin-left:20px;margin-top:15px;width:86%}.lt123_gopy_noti{color:#7c7c7c;font-family:Times New Roman;font-style:italic;line-height:23px;margin-left:20px;margin-top:10px;text-align:justify;width:86%}.lt123_gopy_area{border:1px solid #dfdfdf;border-radius:5px;font-family:Times New Roman;font-style:italic;height:155px;font-size:17px;margin-left:11px;margin-bottom:15px;margin-top:20px;padding:10px 0 10px 12px;width:88%}.lt123_box_gopy .lt123_btn_sent{background-color:#3493bc;border-radius:5px;color:#fff;cursor:pointer;display:block;float:right;font-family:arial;margin-right:25px;margin-top:0;padding:10px 40px;text-align:center}.lt123_box_gopy .lt123_btn_close{color:#ed1c24;cursor:pointer;float:right;font-family:arial;margin-right:42px;margin-top:7px;padding:3px 5px}.lt123_box_gopy .technic_err{color:#7c7c7c;font-size:14px;font-style:italic;font-family:Times New Roman;margin-left:15px}.box_thank_send .thank_txt{margin-top:130px;padding-top:35px;text-align:center;font-family:Times New Roman;font-size:14px;font-style:italic;color:#7c7c7c}.box_thank_send .thank_txt span{color:#ed1c24}#lesson-detail-page .m-ldp-title .m-ldpt-name{cursor:pointer;vertical-align:middle;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;width:68%;text-transform:none;padding:0 0 0 2vw;line-height:35px;font-size:20px;font-weight:700;display:inline-block}.back-arrow{width:17px;height:27px;background-position:-454px -96px;display:inline-block;vertical-align:middle}.m-ldp-info{box-shadow:0 3px 3px #cecbcb;position:absolute;top:10px;width:100%}.m-ldpi-left{margin-right:1vw;display:inline-block;padding:10px;background-color:#fff981;border-radius:0 30px 30px 0;vertical-align:middle}.m-ldpil-time{padding:0 4px}.m-ldpi-score{background-color:#d55;font-size:24px;vertical-align:middle;padding:6px 11px;border-radius:30px}.m-ldpi-err{cursor:pointer;vertical-align:middle;display:inline-block;padding:10px 4px 10px 0}.pull-right{float:right!important}._stt_q{display:none}._ab{position:absolute;top:0;left:0}.bg_btclass_cen{border-bottom:1px solid #d55;padding-bottom:20px}.bg_btclass_bottom{width:100%;text-align:center;padding:20px 0;margin:0 auto}._box_post_ct{width:100%;font-size:18px;line-height:100%;position:relative}.basic_title_pr{color:#684228;text-align:center;font-weight:700;width:100%;float:left}.basic_content_gt{float:left;text-align:center;width:100%;line-height:196%;color:#0e5acc}.basic_segment{display:none;width:100%;height:auto;position:relative;background-color:#fff;padding:52px 0 30px}.basic_title_part{color:#e84b00;font-weight:700;width:100%;margin-top:20px}.basic_content{width:100%;text-align:justify;color:#173366;clear:both;margin-bottom:10px;font-style:italic}.basic_alert_note{font-style:italic;text-align:center;clear:both}.basic_active{display:block}span#_bt_helps{background-position:-10px -292px;width:31px;height:31px;display:block;clear:both;margin-right:115px;position:absolute;bottom:21px;right:15px;z-index:99;cursor:pointer}.icon-bt-star{width:21px;height:20px;background-position:-199px -292px;margin:10px 2px;display:inline-block}#blank_part[tpl=blank_part_s]{margin-left:30px}.q_blank_part_tittle{line-height:35px;font-size:20px}._lt_left{text-align:justify}.JustifyRight{text-align:right}._lt123_smallblock{width:50%!important}.q_blank_part_tittle .mot_so input{min-width:4vw!important}.q_blank_part_tittle input{text-align:center;font-size:24px;min-width:70px;border:1px solid #a4a4a4;-moz-transition:all .3s ease-in-out;-o-transition:all .3s ease-in-out;-webkit-transition:all .3s ease-in-out;transition:all .3s ease-in-out;outline:0}.col3{width:30%}.col5{width:20%}.xtrue{border:2px solid #04b786}.xfalse{border:2px solid #d55}.spantrue{background-color:#58960f;color:#fff;padding:2px 15px;margin-right:15px}.spanfalse{background-color:#ed1c24;color:#fff;padding:2px 15px;margin-right:15px}.__show_bls{color:#fff;background-color:#58960f;width:25px;text-align:center;display:none;padding:2px 10px}.q_blank_part2_ques{border-bottom:1px solid #474747;text-align:center;padding-bottom:25px;margin-bottom:10px;font-size:30px;float:left;min-width:50px}.blank_part2_left{float:left;display:block;margin-top:38px;margin-left:-22px}.blank_part2_right{display:block;height:71px;line-height:180%;text-align:right}.blank_part2_right span{display:block;height:52%}.q_blank_part2_ques_{margin:0 auto;text-align:right;font-size:30px;float:left;width:49px}.box_blank_part2{margin:0 auto;width:60px;margin-bottom:40px}.box_blank_part2 input{text-align:right;font-size:30px;width:42px}.bt_ans_lua_chon{font-size:18px;color:#fff;background-color:#348dc1;margin:10px 1%;padding:15px 1%;text-align:center;cursor:pointer;display:inline-block;border-radius:7px;-webkit-border-radius:7px;-moz-border-radius:7px;vertical-align:top}.bt_ans_lua_chon.active{background-color:#ff3b7b}.bt_ans_lua_chon.col2,.bt_ans_lua_chon.col4{width:94%}.bt_ans_lua_chon.col3{width:94% !important;font-size:22px}#lua_chon1 .bt_ans_lua_chon.col3{width:45%;font-size:22px}.bt_ans_lua_chon.col1{width:96%}.bt_question{padding:0 3%;max-width:600px;margin:0 auto;display:none}.bt_ques_tit{padding:20px 0;text-align:center;font-size:20px}.bt_ques_tit ._content_audio{display:inline-block;vertical-align:super}.bt_ques_instruc{font-size:20px;color:#d16c1a;margin:20px auto 5px;padding-left:30px}.bg_btclass_bottom button{background:#f37c03;border-radius:40px;box-shadow:1px 2px 2px 0 #999;color:#fff;cursor:pointer;line-height:25px;padding:12px 50px;font-size:19px; font-weight:bold;border:none;position:relative;width:84%}.bg_btclass_bottom button span{display:inline-block;vertical-align:middle}.icon-btn-check{width:24px;height:24px;background-position:-387px -184px;margin-left:10px;margin-top:3px}.bg_btclass_bottom .bt_show_hd{display:none;position:relative;margin:0 auto 16px;cursor:pointer;background:#63c9ca}.bt_show_hd::after{background-position:-330px -182px;content:"";width:36px;height:36px;display:inline-block;position:absolute;z-index:8;left:0;top:5px}._xemhuongdan{background: #0f8277;padding: 10px 20px;border-radius: 8px;cursor: pointer;color: #fff;}.bt_ques_answer[id=phep_tinh]{margin-bottom:150px}.btques_active{display:block}._pheptinh_{display:inline-block;cursor:pointer;position:relative}.show_pheptinh{width:250px;position:absolute;border:1px solid #e7e1c4;background-color:#fffdf4;padding:10px;padding-right:15px;border-radius:10px;-webkit-border-radius:10px;-moz-border-radius:10px;top:68px;left:-88px}.show_pheptinh span{width:55px;height:55px;display:inline-block;line-height:55px;margin-left:5px;border:1px solid #c5c5c5;background-color:#f5f5f5;border-radius:10px;-webkit-border-radius:10px;-moz-border-radius:10px;cursor:pointer}.show_pheptinh span:hover{color:#fff;background-color:#3b97cd}.arrow_top{background-image:url(../image/ic_showpt.png);background-repeat:no-repeat;width:20px;height:14px;position:absolute;top:-14px;left:112px}._valuept{border:1px solid #ccc;width:50px;height:45px;display:inline-block;margin-bottom:-10px;line-height:45px;color:#3e9dd4}.bt_ques_answer[id=blank_part2] ._pheptinh_{margin-left:-22px;margin-top:-12px}.bt_ques_answer[id=blank_part2] ._valuept{width:50px}.qz_pop_layout{height:58vh;margin-top:10vh;text-align:center;line-height: 30px;}.qz_pop_layout a{color:#d55}.qz_ahref{color:#fff!important;background-color:#06ba89;width:200px;display:block;margin:5vh auto 0;padding:2vh}.bt_question img{margin:10px}.bg_btclass_right{background-color:ivory;border-radius:0 10px 10px 0;box-shadow:1px 1px 5px 0 #999;display:inline-block}.bt_popup_result{background-image:url(../image/bt_result.png);width:100%;max-width:400px;position:absolute;z-index:999;bottom:190px;background-size:100% 100%;display:none}.bt_popup_result img{max-width:300px}.bt_html_help{width:95%;margin:0 auto;font-size:16px;color:#2c2c2c;line-height:190%}.bt_tit_true_answer{color:#9c2c24;text-align:center;font-size:18px;padding-top:20px;padding-bottom:20px;background:url(../image/line-border.png) top center repeat-x,url(../image/line-border.png) bottom center repeat-x;margin-top:35px}.bt_true_answer{font-size:20px;color:#000}.bt_box_help{margin:0 auto;text-align:center;font-size:16px;color:#000;display:none}.bt_box_help h1,.bt_box_video h1{color:#ff3b7b;text-transform:uppercase;text-align:center;font-size:20px}.bt_box_help img{padding-top:15px}.bt_ques_img{min-height:220px}.bt_ques_img img{width:100%}._tit_hoi{display:inline-block;width:55px;height:30px;line-height: 30px; background-color:#3b3c3e;color:#fff;border-radius:4px;-webkit-border-radius:4px;-moz-border-radius:4px;font-size:22px;text-align:center;border:none}.bt_ques_instruc_sl{line-height:33px;font-size:20px;color:#000;width:100%;margin:0 auto;text-align:center;height:auto;padding:20px 0;display:block;word-break:break-word}.bt_ques_instruc_sl span{line-height:28px!important}#result{width:100%;height:auto;margin:0 auto;position:relative;z-index:1;background-image:linear-gradient(to bottom,#51b6d7,#eff7fa);background-color:#53c9f552}svg{width:100%!important}#lua_chon1 .bt_ans_lua_chon{background-color:#fff;border:1px solid #777;color:#004040}#lua_chon1 .bt_ans_lua_chon.active{border-color:#ff3b7b !important;color:#ff3b7b;box-shadow: 0px 0px 31px #3124245c;}.bt_ans_lua_chon .math-lt123{cursor:pointer!important}.img_dd.tiny{width:10vw!important;height:auto!important}.img_dd.small{width:12vw!important;height:auto!important;max-width:60px}.img_dd{height:auto!important;display:inline-block;border:1px solid transparent;width:12vw!important;max-width:60px}.bgImage{background-repeat:no-repeat;background-size:100% 100%}img.img_dd.none{width:auto!important;max-width:none;height:auto;max-height:none}.img_dd.medium{height:auto!important;width:25vw!important;max-width:120px}.img_dd.large{height:auto!important;width:33vw!important;max-width:200px}.lt123_imgs{padding-bottom:15px;text-align:center}#lua_chon1 .bt_ans_lua_chon{background-color:#fff;border:2px solid #3493bc;color:#004040;width:96%}._cl_1{color:#ff3b7b;font-weight:700}._cl_2{color:#498601;font-weight:700}.tim_x.inp_focus{border:1px solid #81baea;box-shadow:#348dc1 0 0 2vw}span.svgedit{display:inline-block;padding:0}.lt123matrix{display:inline-block}.lt123_math{float:left}.item_col{border:1px solid transparent;border-collapse:collapse;float:left;margin:0;min-height:30px;padding:0;position:relative;text-align:center;width:40px}.clear_both{clear:both;display:block!important;float:none;width:100%!important}.lt123_math .item_col{border:medium none;float:left;font-size:20pt;height:38px;padding-bottom:5px;padding-top:5px;padding-right:5px;text-align:right;min-width:70px;margin-top:2px}.lt123_math .item_col .math-gach-cheo{position:absolute;right:3px}.lt123_math .item_col .math-gach-cheo-trai{font-size:10px;position:absolute;right:2px;top:8px}.item_col.bm{border-bottom:1px solid #000!important}.item_col.tp{border-top:1px solid #000!important}.item_col .phep_cong{font-size:20px;position:absolute;right:0;top:-50%}.item_col .phep_nhan{font-size:20px;position:absolute;right:0;top:-50%}.item_col .phep_tru{font-size:20px;position:absolute;right:20%;top:-50%}.lt123_math .tim_x.x2{width:100px!important}.lt123_math .tim_x{width:100%}.lt123matrix .lt123_math .tim_x{text-align:right}.in_put.phep_tinh_input,.tim_x.phep_tinh_input{border:1px solid #dcdcdc;display:block;height:20px;position:absolute;right:20%;top:-40%;width:20px!important;font-size:22px}.mth_td.otrong .tim_x{width:100%!important;position:relative}.mot_so .mth_td.otrong .tim_x{padding:0!important}.lt123_math.mot_so .tim_x{right:3px;width:100%!important;height:24pt}.mot_so .tim_x{border-radius:0;top:2px}.mot_so .item_col{width:18px;padding:1px;padding-left:1px;min-height:25px}.lt123_math.mot_so .tim_x[size="1"]{height:27px}.lt123matrix .lt123_math.mot_so .item_col{min-width:10px}.mot_so .item_col.mt_text{width:60px;text-align:center;padding:1px 5px;padding-left:1px;min-height:25px}.mot_so .item_col.mt_long_text{width:55px;padding:1px 5px;padding-left:1px;min-height:25px}.wrapper_matrix.mot_so .item_col{width:20px}.lt123_math .mt_note{float:left!important;font-size:14px!important;font-style:italic;text-align:left!important;width:300px!important}.parent-clock{display:inline-block;padding:15px 0}.clock_block{position:absolute;width:185px;height:185px;z-index:8888}.jquery-timepicker-minute-number{font-size:16px}.clock-digital-parse{text-align:center!important;background-image:url(../image/digital-clock.png);width:110px!important;height:74px;padding:0;border:none!important;font-family:Liquid,sans-serif;color:#6bd9d9;font-size:26px!important;letter-spacing:4px}.bt_noiso{display:inline-block;margin-bottom:20px;margin-top:50px}.bt_noiso span{display:inline-block}.bt_ques_instruc_sl input.tim_x{text-align:center;font-size:20px;width:42px;border:1px solid #a4a4a4;-moz-transition:all .3s ease-in-out;-o-transition:all .3s ease-in-out;-webkit-transition:all .3s ease-in-out;transition:all .3s ease-in-out;outline:0}.bt_noiso .tim_x{text-align:center;border:1px solid #fff;top:0;line-height:25px;min-height:25px;min-width:55px;max-width:95px;width:auto}.bt_noiso .o_so{font-size:20px;min-height:25px;min-width:40px;line-height:25px;text-align:center;border:1px solid #ccc}.bt_noiso .o_muiten{background-image:url(../image/arrow3.png);background-repeat:no-repeat;background-size:100% auto;height:30px;margin-left:0;margin-right:3px;margin-top:40px;text-align:center;}.bt_noiso .line_capso{background-image:url(../image/line_capso.png);background-repeat:no-repeat;background-size:100% auto;height:30px;margin-left:0;margin-top:-7px;text-align:center;width:95px}.bt_noiso .line_capso .o_tren,.bt_noiso .o_muiten .o_tren{display:inline-block;float:none;font-size:20px;margin-top:0;position:relative;top:-35px}.bt_noiso .line_capso .tim_x,.bt_noiso .o_muiten .tim_x{border-radius:0;width:35px!important}.o_tren .tim_x{border:1px solid #ccc}.bt_lichthang{width:365px;margin:0 auto;font-size:20px;border:1px solid #ccc;margin-bottom:20px;-webkit-border-radius:20px;-moz-border-radius:20px;border-radius:20px}.bt_lichthang ._month{text-transform:uppercase;color:#fff;background-color:#23992c;padding:10px 0;-webkit-border-radius:20px 20px 0 0;-moz-border-radius:20px 20px 0 0;border-radius:20px 20px 0 0}.bt_lichthang table#_tabcalendar{text-align:center;color:#424242;width:100%;font-size:18px;margin-top:5px;font-weight:700}.bt_lichthang thead{font-size:9px;font-weight:700}.bt_lichthang thead span{width:49px;display:inline-block}.bt_lichthang thead th:last-of-type span{color:#d55}.bt_lichthang tbody tr td:last-of-type{color:#d55}#_tabcalendar ._h{color:#fff;background-color:#424242;width:100%;display:inline-block}.bt_tiaso{background-image:url(../image/tiaso.png);background-position:left 10px;background-repeat:no-repeat;display:inline-block;margin-left:20px;margin-top:40px;min-width:100px;padding-right:40px;padding-top:20px;position:relative;text-align:center;word-break:normal}.bt_tiaso .so:first-child{margin-left:-20px}.bt_tiaso .so{background-image:url(../image/tia_moc.png);background-position:center top;background-repeat:no-repeat;float:left;margin-left:40px;margin-top:-10px;padding-top:15px;text-align:center;width:40px}.bt_tiaso .input_so{display:inline-block;font-size:16pt;margin:0 auto;position:relative;text-align:center}.bt_tiaso .so .tim_x{border-radius:0;display:block;font-size:16pt;height:33px;line-height:33px;text-align:center;width:80px!important;margin-left:-20px}.bt_tiaso .topn{background-image:url(../image/tiaso_1.png);background-position:center top;background-repeat:no-repeat;color:transparent;display:inline-block;height:10px;position:absolute;right:0;top:10px;width:20px}.ottia{display:block;line-height:30px;position:absolute;text-align:center;top:-20px;width:45px}.bt_tiaso .ottia{font-size:14pt;text-align:center;width:60px}.bt_tiaso .ottia .tim_x{margin:0 auto!important;position:static;width:35px!important;font-size:18px;text-align:center}.bt_bangso{display:inline-block;margin:10px 0}.tb_bangso{border-collapse:collapse}.tb_bangso tr td{border:1px solid #000;border-collapse:collapse;font-size:6vw;padding:1vh 2vw;text-align:left}.tb_bangso 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