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1em}.middle_content[data-v-be2c47a8]{background:#fff;margin:0 auto;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;-webkit-box-align:start;-ms-flex-align:start;align-items:flex-start;width:100%;height:calc(100vh - 57px);padding:40px}.resizer[data-v-be2c47a8]{width:14px;height:100%;cursor:col-resize;background-color:#f5f7fa;border-left:1px solid #e4e7ed;border-right:1px solid #e4e7ed;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;z-index:10;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:background-color .3s;transition:background-color .3s}.resizer[data-v-be2c47a8]:hover{background-color:#e6e8eb}.resizer .icon-handler[data-v-be2c47a8]{width:30px;height:30px;pointer-events:none}.single_left[data-v-be2c47a8]{width:50%;height:80%}.single_right[data-v-be2c47a8]{width:45%;height:80%;padding-left:20px}.question_subtitle[data-v-be2c47a8]{font-size:15px;font-weight:700;color:#333}.rich-content[data-v-be2c47a8]{width:100%;height:100%;overflow-y:auto}.body_content[data-v-be2c47a8]{margin-top:20px}.con .full_width[data-v-be2c47a8]{width:100%}.speak_tb1[data-v-be2c47a8]{background-color:#f5f7fa;border-radius:3.16px;height:25px;width:66px;font-family:SourceHanSansCN-Regular;font-size:12px;color:#666;margin-right:2%;text-align:center;padding-top:5px;padding-bottom:5px}[data-v-be2c47a8] .el-collapse-item__header{font-size:18px;line-height:26px;margin:auto;color:#333;font-weight:700;cursor:pointer;padding-left:13px}[data-v-be2c47a8] .rich-content table{max-width:100%}[data-v-be2c47a8] .rich-content img,[data-v-be2c47a8] .rich-content td{max-width:100%;height:auto}.section-container[data-v-ebc89b5a]{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-direction:column;flex-direction:column;height:100vh}.section-container .section-header[data-v-ebc89b5a]{-webkit-box-flex:0;-ms-flex:0 0 57px;flex:0 0 57px}.section-container .section-body[data-v-ebc89b5a]{-webkit-box-flex:1;-ms-flex:1;flex:1;overflow-y:auto}.section-container .section-footer[data-v-ebc89b5a]{-webkit-box-flex:0;-ms-flex:0 0 45px;flex:0 0 45px;border-top:1px solid #c1c1c1}.section-container .section-footer .section-footer-tab[data-v-ebc89b5a]{display:-webkit-box;display:-ms-flexbox;display:flex;height:100%}.section-container .section-footer .section-footer-tab .section-footer-tab-item[data-v-ebc89b5a]{-webkit-box-flex:1;-ms-flex:1;flex:1;height:100%;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;cursor:pointer}.section-container .section-footer .section-footer-tab .section-footer-tab-item .section-footer-tab-item-title[data-v-ebc89b5a]{margin-right:32px}.section-container .section-footer .section-footer-tab .section-footer-tab-item .section-footer-tab-item-number[data-v-ebc89b5a]{font-weight:bolder;font-size:14px}.section-container .section-footer .section-footer-tab-item.active[data-v-ebc89b5a]{color:#000;font-weight:700}.ielts_bg[data-v-457702b2]{background:#f5f7fa}.middle_content[data-v-457702b2]{background:#fff;margin:0 auto;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;-webkit-box-align:start;-ms-flex-align:start;align-items:flex-start;width:1300px;height:calc(100vh - 57px);padding-left:40px;padding-right:40px}.app-container[data-v-457702b2]{height:50px;width:100%}.control-header[data-v-457702b2]{color:#fff;background-color:#ccc!important;height:100%;padding-left:4px;padding-right:4px;position:relative}.toolbar[data-v-457702b2]{height:26px!important;border-bottom:1px solid #f9f9f9!important;padding-left:11px!important;padding-right:8px!important;background-color:#fff!important;line-height:26px!important}.pull-right[data-v-457702b2]{float:right}.header-right[data-v-457702b2]{position:absolute;right:4px;top:50%;-webkit-transform:translateY(-50%);transform:translateY(-50%);z-index:2}.button-toolbar[data-v-457702b2]{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center}.btn svg[class^=icons-][data-v-457702b2]{height:17px!important;width:auto!important;max-width:17px;opacity:1;fill:currentColor;vertical-align:middle;-ms-flex-negative:0;flex-shrink:0}.ml-1[data-v-457702b2]{margin-left:10px}.relative[data-v-457702b2]{position:relative}.overlay[data-v-457702b2]{position:absolute;right:0;top:100%;background-color:#0a0a0a;border:1px solid #605e5d;max-height:200px;overflow:hidden;visibility:visible;-webkit-transition:max-height 1s;transition:max-height 1s}.overlay.volume[data-v-457702b2]{width:240px;padding:25px 12px 10px 15px;border-radius:16px;border-color:var(--default-737373-color,#737373);margin-top:2px;background-color:#fff;--volume-slider-bar-height:12px;--volume-slider-color:#00565d;--volume-slider-filled-color:#077f83}.overlay.volume .form-group input[type=range].volume-slider[data-v-457702b2]{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:100%;height:9px;border:1px solid var(--default-737373-color,#737373);border-radius:16px;outline:none;-webkit-transition:.2s;-webkit-transition:opacity .2s;transition:opacity .2s;left:0;top:3px}.overlay.volume.telxml .form-group input[type=range].volume-slider[data-v-457702b2]:hover{opacity:1}.overlay.volume.telxml .form-group input[type=range].volume-slider[data-v-457702b2]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;background:var(--volume-slider-filled-color);cursor:pointer;border-radius:50%;-webkit-box-shadow:0 4px 4px rgba(0,0,0,.25);box-shadow:0 4px 4px rgba(0,0,0,.25)}.overlay.volume.telxml .form-group input[type=range].volume-slider[data-v-457702b2]:focus::-webkit-slider-thumb{border:2px solid #fff;outline:var(--color-toefl-teal) solid 2px;outline-offset:0}.overlay .close[data-v-457702b2]{position:absolute;z-index:1;top:3px;right:5px;opacity:.7;font-size:16px;font-weight:400}.overlay.volume .close[data-v-457702b2]{top:10px;right:6px}.volume-slider-bar-container[data-v-457702b2]{display:-webkit-box;display:-ms-flexbox;display:flex;gap:4px;margin-bottom:8px;-webkit-box-align:baseline;-ms-flex-align:baseline;align-items:baseline}.bar[data-v-457702b2]{width:6px;height:var(--volume-slider-bar-height);background-color:var(--volume-slider-color);opacity:1;border-radius:7px}.bar.filled[data-v-457702b2]{opacity:1;background-color:var(--volume-slider-filled-color)}.bar[data-v-457702b2]:first-child{height:calc(var(--volume-slider-bar-height) + 1px)}.bar[data-v-457702b2]:nth-child(2){height:calc(var(--volume-slider-bar-height) + 2px)}.bar[data-v-457702b2]:nth-child(3){height:calc(var(--volume-slider-bar-height) + 3px)}.bar[data-v-457702b2]:nth-child(4){height:calc(var(--volume-slider-bar-height) + 4px)}.bar[data-v-457702b2]:nth-child(5){height:calc(var(--volume-slider-bar-height) + 5px)}.bar[data-v-457702b2]:nth-child(6){height:calc(var(--volume-slider-bar-height) + 6px)}.bar[data-v-457702b2]:nth-child(7){height:calc(var(--volume-slider-bar-height) + 7px)}.bar[data-v-457702b2]:nth-child(8){height:calc(var(--volume-slider-bar-height) + 8px)}.bar[data-v-457702b2]:nth-child(9){height:calc(var(--volume-slider-bar-height) + 9px)}.bar[data-v-457702b2]:nth-child(10){height:calc(var(--volume-slider-bar-height) + 10px)}.bar[data-v-457702b2]:nth-child(11){height:calc(var(--volume-slider-bar-height) + 11px)}.bar[data-v-457702b2]:nth-child(12){height:calc(var(--volume-slider-bar-height) + 12px)}.bar[data-v-457702b2]:nth-child(13){height:calc(var(--volume-slider-bar-height) + 13px)}.bar[data-v-457702b2]:nth-child(14){height:calc(var(--volume-slider-bar-height) + 14px)}.bar[data-v-457702b2]:nth-child(15){height:calc(var(--volume-slider-bar-height) + 15px)}.bar[data-v-457702b2]:nth-child(16){height:calc(var(--volume-slider-bar-height) + 16px)}.bar[data-v-457702b2]:nth-child(17){height:calc(var(--volume-slider-bar-height) + 17px)}.bar[data-v-457702b2]:nth-child(18){height:calc(var(--volume-slider-bar-height) + 18px)}.bar[data-v-457702b2]:nth-child(19){height:calc(var(--volume-slider-bar-height) + 19px)}.bar[data-v-457702b2]:nth-child(20){height:calc(var(--volume-slider-bar-height) + 20px)}.overlay.volume button#playAudioBtn[data-v-457702b2]{color:#333;margin-top:5px;display:none!important}.button-toolbar-item[data-v-457702b2]{cursor:pointer;min-width:62px;background-image:none!important;border-radius:12px;padding:0 24px;height:40px;font-size:13px;border-color:#f5f5f5!important;font-family:Open Sans;font-weight:700;line-height:40px;font-style:normal;background:#fff;color:#077f83!important;overflow:visible;display:-webkit-inline-box;display:-ms-inline-flexbox;display:inline-flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;gap:8px}.btn.primary-btn[data-v-457702b2]{background:transparent!important;color:#fff!important}.btn.primary-navigation-btn[data-v-457702b2]{background-color:#fff!important;color:#077f83!important}.btn.primary-navigation-btn[data-v-457702b2]:disabled{opacity:.6;cursor:not-allowed!important;pointer-events:none}.btn.primary-btn[data-v-457702b2]:hover{background-color:#00565d!important}.primary-btn.btn-volume[aria-expanded=true][data-v-457702b2]{background-color:#fff!important;color:#077f83!important}.app-page-outer[data-v-457702b2]{padding-left:11.07086586820338%;padding-right:11.07086586820338%;padding-top:60px}.section-name-labels[data-v-457702b2]{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;gap:8px}.section-name-label[data-v-457702b2]{font-size:15px;margin:0 8px 0 8px;font-family:Open Sans;font-style:normal;color:#3d3d3d;line-height:26px;font-weight:600}.lower-toolbar[data-v-457702b2]{position:relative}.auto-play-tip[data-v-457702b2]{position:absolute;right:20px;bottom:-40px;text-align:right;cursor:pointer;text-decoration:underline}.lower-toolbar .question-number-label[data-v-457702b2]{font-weight:600;font-size:13px;margin:0 8px 0 8px;color:#3d3d3d;font-family:Open Sans;font-style:normal}.iviewer-item-outerDiv[data-v-457702b2]{border-width:1px;border-style:solid;border-color:#f8f8f8;padding:.19569471624266144%;margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;background-color:#fff;-webkit-box-sizing:content-box;box-sizing:content-box}[data-v-457702b2] .mark{padding:0;background:#077f83!important;color:#fff;font-weight:700}.svg-position-left[data-v-457702b2]{margin:0 8px 0 -8px!important}[data-v-457702b2] .h1-title{font-size:24px!important;color:#414042!important}[data-v-457702b2] .page1{font-size:16px!important;color:#414042!important}.icon-17[data-v-457702b2]{width:auto;height:17px;display:-webkit-inline-box;display:-ms-inline-flexbox;display:inline-flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;overflow:visible}.section-container[data-v-45ff13c3]{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-direction:column;flex-direction:column;height:100vh}.section-container .section-header[data-v-45ff13c3]{-webkit-box-flex:0;-ms-flex:0 0 57px;flex:0 0 57px}.section-container .section-body[data-v-45ff13c3]{-webkit-box-flex:1;-ms-flex:1;flex:1;overflow-y:auto}.section-container .section-footer[data-v-45ff13c3]{-webkit-box-flex:0;-ms-flex:0 0 45px;flex:0 0 45px}.section-container .section-footer .section-footer-tab[data-v-45ff13c3]{display:-webkit-box;display:-ms-flexbox;display:flex;height:100%}.section-container .section-footer .section-footer-tab .section-footer-tab-item[data-v-45ff13c3]{-webkit-box-flex:1;-ms-flex:1;flex:1;height:100%;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;cursor:pointer}.section-container .section-footer .section-footer-tab .section-footer-tab-item .section-footer-tab-item-title[data-v-45ff13c3]{margin-right:32px}.section-container .section-footer .section-footer-tab .section-footer-tab-item .section-footer-tab-item-number[data-v-45ff13c3]{font-weight:bolder;font-size:14px}.section-container .section-footer .section-footer-tab .section-footer-tab-item.active[data-v-45ff13c3]{color:#000;font-weight:700}