body,dl,dt,dd,ul,ol,li,pre,form,fieldset,input,figure,p,blockquote,th,td{font-weight:400;margin:0;padding:0;list-style:none}h1,h2,h3,h4,h4,h5{margin:0;padding:0}html{height:100%;box-sizing:border-box}body{height:100%;-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-family:Microsoft YaHei,Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,"Arial, sans-serif"}label{font-weight:700}html,body{scroll-behavior:smooth}*,*:before,*:after{box-sizing:inherit}a:focus,a:active{outline:none}a,a:focus,a:hover{cursor:pointer;color:inherit;text-decoration:none}:focus{outline:none}.clearfix:after{visibility:hidden;display:block;font-size:0;content:" ";clear:both;height:0}.fl{float:left}.fr{float:right}.text-left{text-align:left}.text-right{text-align:right}.text-center{text-align:center}.page-container{position:relative;width:1200px;margin:0 auto}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{border-radius:3px;background:rgba(0,0,0,.06);box-shadow:inset 0 0 5px #00000014}::-webkit-scrollbar-thumb{border-radius:3px;background:rgba(0,0,0,.12);box-shadow:inset 0 0 10px #0003}.el-textarea__inner{font-family:Microsoft YaHei}.el-button.is-text{padding:0;color:#246dff!important}.ck .table table{border-collapse:collapse;border-spacing:0;width:100%;height:100%;border:1px double #b3b3b3}.ck .table table td,.ck .table table th{min-width:2em;padding:.4em;border:1px solid #bfbfbf}.ck .table table tr:nth-child(1){background:#9ec1cc;color:#fff}.ck .image img{max-width:100%}.ck p,.ck h1,.ck h2,.ck h3,.ck h4,.ck h5,.ck h6{margin:10px 0;line-height:1.8}.bif .student-container{background:#f3f5f9 url(./bg_bif.ffe9b2ee.png);background-size:contain}.bif .student-container .header-wrap{background:#fff}.bif .student-container .header-wrap .left-logo .logo{background:url(data:image/png;base64,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) no-repeat center}.bif .student-container .header-wrap .ChangePlatform .paltform-name{color:#000}.bif .student-container .header-wrap .navbar-container{white-space:nowrap;overflow:hidden}.bif .student-container .header-wrap .navbar-container .nav-item{font-size:16px;color:#333;padding:0;margin:0 1vw}.bif .student-container .header-wrap .navbar-container .nav-item.active{font-size:18px;color:#21c17f;padding:0}.bif .student-container .header-wrap .user-info-wrap .avatar-wrapper .el-icon{color:#666}.bif .student-container .header-wrap .close-box .close-btn{color:#21c17f!important}.bif .student-container .foot-wrap{height:60px;line-height:60px;background:#0c0d0d}.bif .student-container .foot-wrap .copyright{line-height:60px;color:#fff}.bif .student-container .foot-wrap .copyright b{color:#fff}.bif .student-container .user-select .total-analysis.active{color:#21c17f}.bif .student-container .close-box{top:0}.bif .student-container .close-box .close-btn{font-size:16px;color:#21c17f}.bif .student-container .achievement-wrap .iframe{min-height:calc(100vh - 177px)}:root{--ck-color-base-active: hsl(208, 88%, 52%);--ck-color-image-caption-background: hsl(0, 0%, 97%);--ck-color-image-caption-text: hsl(0, 0%, 20%);--ck-color-mention-background: hsla(341, 100%, 30%, .1);--ck-color-mention-text: hsl(341, 100%, 30%);--ck-color-table-caption-background: hsl(0, 0%, 97%);--ck-color-table-caption-text: hsl(0, 0%, 20%);--ck-color-table-column-resizer-hover: var(--ck-color-base-active);--ck-highlight-marker-blue: hsl(201, 97%, 72%);--ck-highlight-marker-green: hsl(120, 93%, 68%);--ck-highlight-marker-pink: hsl(345, 96%, 73%);--ck-highlight-marker-yellow: hsl(60, 97%, 73%);--ck-highlight-pen-green: hsl(112, 100%, 27%);--ck-highlight-pen-red: hsl(0, 85%, 49%);--ck-image-style-spacing: 1.5em;--ck-inline-image-style-spacing: calc(var(--ck-image-style-spacing) / 2);--ck-table-column-resizer-position-offset: calc(var(--ck-table-column-resizer-width) * -.5 - .5px);--ck-table-column-resizer-width: 7px;--ck-todo-list-checkmark-size: 16px;--ck-z-default: 1}.ck-editor__editable_inline{background:#fff;height:260px!important;border:1px solid #c4c4c4!important;border-top-width:0!important}.ck-content .table table{border-collapse:collapse;border-spacing:0;width:100%;height:100%;border:1px double #b3b3b3}.ck-content .image{text-align:center}.ck-content .table table td,.ck-content .table table th{min-width:2em;padding:.4em;border:1px solid #bfbfbf}.ck-content .table table tr:nth-child(1){background:#9ec1cc;color:#fff}.ck-content .image img{max-width:100%}.ck-content p,.ck-content h1,.ck-content h2,.ck-content h3,.ck-content h4,.ck-content h5,.ck-content h6{margin:10px 0;line-height:1.8}.ck-content code{background-color:#c7c7c74d;padding:.15em;border-radius:2px}.ck-content blockquote{overflow:hidden;padding-right:1.5em;padding-left:1.5em;margin-left:0;margin-right:0;font-style:italic;border-left:solid 5px hsl(0deg,0%,80%)}.ck-content[dir=rtl] blockquote{border-left:0;border-right:solid 5px hsl(0deg,0%,80%)}.ck-content .text-tiny{font-size:.7em}.ck-content .text-small{font-size:.85em}.ck-content .text-big{font-size:1.4em}.ck-content .text-huge{font-size:1.8em}.ck-content .marker-yellow{background-color:var(--ck-highlight-marker-yellow)}.ck-content .marker-green{background-color:var(--ck-highlight-marker-green)}.ck-content .marker-pink{background-color:var(--ck-highlight-marker-pink)}.ck-content .marker-blue{background-color:var(--ck-highlight-marker-blue)}.ck-content .pen-red{color:var(--ck-highlight-pen-red);background-color:transparent}.ck-content .pen-green{color:var(--ck-highlight-pen-green);background-color:transparent}.ck-content .image>figcaption{display:table-caption;caption-side:bottom;word-break:break-word;color:var(--ck-color-image-caption-text);background-color:var(--ck-color-image-caption-background);padding:.6em;font-size:.75em;outline-offset:-1px}.ck-content .image{display:table;clear:both;text-align:center;margin:.9em auto;min-width:50px}.ck-content .image img{display:block;margin:0 auto;max-width:100%;min-width:100%}.ck-content .image-inline{display:inline-flex;max-width:100%;align-items:flex-start}.ck-content .image-inline picture{display:flex}.ck-content .image-inline picture,.ck-content .image-inline img{flex-grow:1;flex-shrink:1;max-width:100%}.ck-content .image.image_resized{max-width:100%;display:block;box-sizing:border-box}.ck-content .image.image_resized img{width:100%}.ck-content .image.image_resized>figcaption{display:block}.ck-content .image-style-block-align-left,.ck-content .image-style-block-align-right{max-width:calc(100% - var(--ck-image-style-spacing))}.ck-content .image-style-align-left,.ck-content .image-style-align-right{clear:none}.ck-content .image-style-side{float:right;margin-left:var(--ck-image-style-spacing);max-width:50%}.ck-content .image-style-align-left{float:left;margin-right:var(--ck-image-style-spacing)}.ck-content .image-style-align-center{margin-left:auto;margin-right:auto}.ck-content .image-style-align-right{float:right;margin-left:var(--ck-image-style-spacing)}.ck-content .image-style-block-align-right{margin-right:0;margin-left:auto}.ck-content .image-style-block-align-left{margin-left:0;margin-right:auto}.ck-content p+.image-style-align-left,.ck-content p+.image-style-align-right,.ck-content p+.image-style-side{margin-top:0}.ck-content .image-inline.image-style-align-left,.ck-content .image-inline.image-style-align-right{margin-top:var(--ck-inline-image-style-spacing);margin-bottom:var(--ck-inline-image-style-spacing)}.ck-content .image-inline.image-style-align-left{margin-right:var(--ck-inline-image-style-spacing)}.ck-content .image-inline.image-style-align-right{margin-left:var(--ck-inline-image-style-spacing)}.ck-content span[lang]{font-style:italic}.ck-content .todo-list{list-style:none}.ck-content .todo-list li{margin-bottom:5px}.ck-content .todo-list li .todo-list{margin-top:5px}.ck-content .todo-list .todo-list__label>input{-webkit-appearance:none;display:inline-block;position:relative;width:var(--ck-todo-list-checkmark-size);height:var(--ck-todo-list-checkmark-size);vertical-align:middle;border:0;left:-25px;margin-right:-15px;right:0;margin-left:0}.ck-content .todo-list .todo-list__label>input:before{display:block;position:absolute;box-sizing:border-box;content:"";width:100%;height:100%;border:1px solid hsl(0deg,0%,20%);border-radius:2px;transition:.25s ease-in-out box-shadow,.25s ease-in-out background,.25s ease-in-out border}.ck-content .todo-list .todo-list__label>input:after{display:block;position:absolute;box-sizing:content-box;pointer-events:none;content:"";left:calc(var(--ck-todo-list-checkmark-size) / 3);top:calc(var(--ck-todo-list-checkmark-size) / 5.3);width:calc(var(--ck-todo-list-checkmark-size) / 5.3);height:calc(var(--ck-todo-list-checkmark-size) / 2.6);border-style:solid;border-color:transparent;border-width:0 calc(var(--ck-todo-list-checkmark-size) / 8) calc(var(--ck-todo-list-checkmark-size) / 8) 0;transform:rotate(45deg)}.ck-content .todo-list .todo-list__label>input[checked]:before{background:hsl(126deg,64%,41%);border-color:#26ab33}.ck-content .todo-list .todo-list__label>input[checked]:after{border-color:#fff}.ck-content .todo-list .todo-list__label .todo-list__label__description{vertical-align:middle}.ck-content .media{clear:both;margin:.9em 0;display:block;min-width:15em}.ck-content .page-break{position:relative;clear:both;padding:5px 0;display:flex;align-items:center;justify-content:center}.ck-content .page-break:after{content:"";position:absolute;border-bottom:2px dashed hsl(0deg,0%,77%);width:100%}.ck-content .page-break__label{position:relative;z-index:1;padding:.3em .6em;display:block;text-transform:uppercase;border:1px solid hsl(0deg,0%,77%);border-radius:2px;font-family:Helvetica,Arial,Tahoma,Verdana,Sans-Serif;font-size:.75em;font-weight:700;color:#333;background:hsl(0deg,0%,100%);box-shadow:2px 2px 1px #00000026;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.ck-content .table{margin:.9em auto;display:table}.ck-content .table table{border-collapse:collapse;border-spacing:0;width:100%;height:100%;border:1px double hsl(0deg,0%,70%)}.ck-content .table table td,.ck-content .table table th{min-width:2em;padding:.4em;border:1px solid hsl(0deg,0%,75%)}.ck-content .table table th{font-weight:700;background:hsla(0deg,0%,0%,.05)}.ck-content[dir=rtl] .table th{text-align:right}.ck-content[dir=ltr] .table th{text-align:left}.ck-content .table table{overflow:hidden;table-layout:fixed}.ck-content .table td,.ck-content .table th{position:relative}.ck-content .table .table-column-resizer{position:absolute;top:-999999px;bottom:-999999px;right:var(--ck-table-column-resizer-position-offset);width:var(--ck-table-column-resizer-width);cursor:col-resize;user-select:none;z-index:var(--ck-z-default)}.ck-content .table[draggable] .table-column-resizer{display:none}.ck-content .table .table-column-resizer:hover,.ck-content .table .table-column-resizer__active{background-color:var(--ck-color-table-column-resizer-hover);opacity:.25}.ck-content[dir=rtl] .table .table-column-resizer{left:var(--ck-table-column-resizer-position-offset);right:unset}.ck-content.ck-read-only .table .table-column-resizer{display:none}.ck-content .table>figcaption{display:table-caption;caption-side:top;word-break:break-word;text-align:center;color:var(--ck-color-table-caption-text);background-color:var(--ck-color-table-caption-background);padding:.6em;font-size:.75em;outline-offset:-1px}.ck-content pre{padding:1em;color:#353535;background:hsla(0deg,0%,78%,.3);border:1px solid hsl(0deg,0%,77%);border-radius:2px;text-align:left;direction:ltr;tab-size:4;white-space:pre-wrap;font-style:normal;min-width:200px}.ck-content pre code{background:unset;padding:0;border-radius:0}.ck-content hr{margin:15px 0;height:4px;background:hsl(0deg,0%,87%);border:0}.ck-content .mention{background:var(--ck-color-mention-background);color:var(--ck-color-mention-text)}@media print{.ck-content .page-break{padding:0}.ck-content .page-break:after{display:none}}