body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.login-container{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;flex:1 1;justify-content:center;min-height:0}.login-box{background:#fff;border-radius:10px;box-shadow:0 10px 25px #0003;max-width:400px;padding:40px;width:100%}.login-box h1{color:#333;font-size:24px;margin-bottom:30px;text-align:center}.form-group{margin-bottom:20px}.form-group label{color:#555}.form-group input{border:1px solid #ddd;border-radius:5px;box-sizing:border-box;font-size:14px;padding:12px;transition:border-color .3s;width:100%}.form-group input:focus{border-color:#667eea;outline:none}.login-btn{background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:5px;color:#fff;cursor:pointer;font-size:16px;font-weight:500;padding:12px;transition:transform .2s;width:100%}.login-btn:hover{transform:translateY(-2px)}.login-btn:active{transform:translateY(0)}.login-btn:disabled{cursor:not-allowed;opacity:.6;transform:none}.page-container{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;margin:0 auto;max-width:1200px;overflow:hidden}.page-header{align-items:center;background:#fafafa;border-bottom:1px solid #e8e8e8;display:flex;justify-content:space-between;padding:20px 30px}.page-header h2{color:#333;font-size:24px;margin:0}.page-content{padding:30px}.placeholder-content{margin-top:20px}.placeholder-item{background:#f5f5f5;border-radius:5px;color:#666;margin-bottom:10px;padding:15px}.profile-section{padding:20px 0}.logout-btn{background:#ff4d4f;border:none;border-radius:5px;color:#fff;cursor:pointer;font-size:16px;padding:12px 40px;transition:all .3s}.logout-btn:hover{background:#ff7875;box-shadow:0 4px 12px #ff4d4f4d;transform:translateY(-2px)}.logout-btn:active{transform:translateY(0)}.create-btn{background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:5px;color:#fff;cursor:pointer;font-size:14px;font-weight:500;padding:10px 24px;transition:all .3s}.create-btn:hover{box-shadow:0 4px 12px #667eea66;transform:translateY(-2px)}.create-btn:active{transform:translateY(0)}.retry-btn{border:none;border-radius:5px;cursor:pointer;font-size:14px;padding:10px 30px;transition:all .3s}.empty-container{padding:80px 20px;text-align:center}.empty-icon{font-size:80px;margin-bottom:20px;opacity:.5}.empty-text{color:#999;font-size:18px;margin-bottom:10px}.empty-hint{color:#bbb;font-size:14px}.course-list{grid-gap:24px;display:grid;gap:24px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.course-card{background:#fff;border:1px solid #e8e8e8;border-radius:12px;display:flex;flex-direction:column;height:100%;overflow:hidden;transition:all .3s}.course-card:hover{border-color:#667eea;box-shadow:0 8px 24px #0000001f;transform:translateY(-4px)}.course-cover{background:#f5f5f5;height:180px;overflow:hidden;position:relative;width:100%}.course-cover img{height:100%;object-fit:cover;width:100%}.course-cover-placeholder{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;font-size:60px;height:100%;justify-content:center;width:100%}.course-info{display:flex;flex:1 1;flex-direction:column;padding:16px}.course-name{color:#333;font-size:18px;font-weight:600;margin:0 0 8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.course-id{color:#999;font-family:monospace;font-size:12px;margin:0 0 12px}.course-desc{-webkit-line-clamp:2;-webkit-box-orient:vertical;color:#666;display:-webkit-box;font-size:14px;line-height:1.5;margin:0 0 12px;overflow:hidden;text-overflow:ellipsis}.course-members,.course-videos{color:#888;font-size:13px;margin:4px 0}.course-actions{background:#fafafa;border-top:1px solid #f0f0f0;display:flex;gap:8px;padding:12px 16px}.action-btn{background:#fff;border:1px solid #d9d9d9;border-radius:4px;cursor:pointer;flex:1 1;font-size:13px;padding:8px 12px;transition:all .3s}.add-student-btn{border-color:#1890ff;color:#1890ff}.add-student-btn:hover{background:#1890ff;color:#fff}.edit-btn{border-color:#52c41a;color:#52c41a}.edit-btn:hover{background:#52c41a;color:#fff}.delete-btn{border-color:#ff4d4f;color:#ff4d4f}.delete-btn:hover{background:#ff4d4f;color:#fff}@media (max-width:768px){.course-list{grid-template-columns:1fr}.course-card{max-width:100%}}@media (min-width:769px) and (max-width:1024px){.course-list{grid-template-columns:repeat(2,1fr)}}@media (min-width:1025px){.course-list{grid-template-columns:repeat(3,1fr)}}.dialog-overlay{align-items:center;animation:fadeIn .2s ease-out;background-color:#0009;bottom:0;display:flex;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:1000}.dialog-content{animation:slideUp .3s ease-out;background:#fff;border-radius:12px;box-shadow:0 10px 40px #0000004d;max-width:90%;width:480px}.dialog-header{align-items:center;border-bottom:1px solid #e8e8e8;display:flex;justify-content:space-between;padding:20px 24px}.dialog-header h3{color:#333;font-size:18px;font-weight:600;margin:0}.dialog-close-btn{align-items:center;background:#0000;border:none;border-radius:4px;color:#999;cursor:pointer;display:flex;font-size:20px;height:32px;justify-content:center;transition:all .3s;width:32px}.dialog-close-btn:hover{background:#f5f5f5;color:#333}.dialog-body{padding:24px}.dialog-course-info{background:#f5f7fa;border-radius:6px;color:#666;font-size:14px;margin-bottom:20px;padding:12px}.dialog-course-info strong{color:#333}.dialog-body .form-group{margin-bottom:0}.dialog-body label{color:#333;display:block;font-size:14px;font-weight:500;margin-bottom:8px}.phone-input{border:1px solid #d9d9d9;border-radius:6px;box-sizing:border-box;font-size:14px;padding:10px 12px;transition:all .3s;width:100%}.phone-input:focus{border-color:#1890ff;box-shadow:0 0 0 2px #1890ff1a;outline:none}.input-hint{color:#999;font-size:12px;margin:8px 0 0}.dialog-footer{border-top:1px solid #e8e8e8;display:flex;gap:12px;justify-content:flex-end;padding:16px 24px}.dialog-btn{border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;padding:8px 20px;transition:all .3s}.cancel-btn:hover:not(:disabled){border-color:#1890ff;color:#1890ff}.submit-btn{background:#1890ff}.submit-btn:hover:not(:disabled){background:#40a9ff}.dialog-btn:disabled{cursor:not-allowed;opacity:.6}@media (max-width:600px){.dialog-content{margin:0 10px;width:95%}.dialog-header{padding:16px 20px}.dialog-body{padding:20px}.dialog-footer{padding:12px 20px}}.create-course-container{margin:0 auto;max-width:800px}.create-course-box{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;padding:30px}.create-course-box h2{border-bottom:2px solid #667eea;color:#333;font-size:24px;margin:0 0 30px;padding-bottom:15px}.form-group input[type=tel],.form-group input[type=text],.form-group textarea{border-radius:4px}.phone-list{margin-bottom:12px}.phone-item{align-items:center;display:flex;gap:10px;margin-bottom:10px}.phone-item input{flex:1 1}.remove-btn{background:#ff4d4f;border:none;border-radius:4px;color:#fff;cursor:pointer;font-size:14px;padding:8px 16px;transition:all .3s;white-space:nowrap}.remove-btn:hover{background:#ff7875}.add-phone-btn{background:#fff;border:1px dashed #667eea;border-radius:4px;color:#667eea;width:100%}.add-phone-btn:hover{background:#f0f2ff;border-color:#4c63d2;color:#4c63d2}.upload-dialog-overlay{align-items:center;background-color:#0009;bottom:0;display:flex;justify-content:center;left:0;pointer-events:auto;position:fixed;right:0;top:0;z-index:9999}.upload-dialog{animation:dialogFadeIn .2s ease-out;background:#fff;border-radius:12px;box-shadow:0 10px 40px #0000004d;max-width:90%;overflow:hidden;width:500px}@keyframes dialogFadeIn{0%{opacity:0;transform:scale(.95) translateY(-10px)}to{opacity:1;transform:scale(1) translateY(0)}}.upload-dialog-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px 24px}.upload-dialog-header h3{font-size:20px;font-weight:600;margin:0}.upload-dialog-body{padding:24px}.upload-task{margin-bottom:30px}.task-name{align-items:center;color:#333;display:flex;font-size:16px;font-weight:500;margin-bottom:12px}.task-name:before{content:"📤";font-size:18px;margin-right:8px}.task-progress-bar{background:#e9ecef;height:12px;margin-bottom:8px}.task-progress-bar,.task-progress-fill{border-radius:6px;overflow:hidden;position:relative}.task-progress-fill{background:linear-gradient(90deg,#667eea,#764ba2);height:100%;transition:width .3s ease}.task-progress-fill:after{animation:shimmer 1.5s infinite;background:linear-gradient(90deg,#0000,#ffffff4d,#0000);bottom:0;content:"";left:0;position:absolute;right:0;top:0}@keyframes shimmer{0%{transform:translateX(-100%)}to{transform:translateX(100%)}}.task-percentage{color:#666;font-size:14px;font-weight:500;text-align:right}.upload-overall{background:#f8f9fa;border-radius:8px;margin-bottom:20px;padding:16px}.overall-text{color:#666;font-size:14px;font-weight:500;margin-bottom:10px}.overall-progress-bar{background:#dee2e6;border-radius:4px;height:8px;overflow:hidden}.overall-progress-fill{background:linear-gradient(90deg,#51cf66,#37b24d);border-radius:4px;height:100%;transition:width .3s ease}.upload-tips{border-top:1px solid #e9ecef;padding-top:16px}.upload-tips p{color:#999;font-size:13px;line-height:1.5;margin:8px 0}.upload-tips p:first-child{color:#667eea;font-weight:500}.task-error{color:#fa5252!important}.task-error:before{content:"⚠️"!important}.upload-error-actions{margin-top:20px}.error-tips{background:#fff3cd;border:1px solid #ffc107;border-radius:8px;margin-bottom:20px;padding:16px}.error-tips p{font-size:14px;line-height:1.6;margin:8px 0}.error-tips p:first-child{color:#51cf66;font-weight:500}.error-tips p:last-child{color:#fa5252;font-weight:500}.error-buttons{display:flex;gap:12px;justify-content:center}.error-buttons button{border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;padding:12px 32px;transition:all .2s ease}.error-buttons .retry-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.error-buttons .retry-btn:hover{box-shadow:0 4px 12px #667eea66;transform:translateY(-2px)}.error-buttons .retry-btn:active{transform:translateY(0)}.error-buttons .cancel-btn{background:#e9ecef;color:#666}.error-buttons .cancel-btn:hover{background:#dee2e6}@media (max-width:600px){.upload-dialog{width:95%}.upload-dialog-header{padding:16px 20px}.upload-dialog-header h3{font-size:18px}.upload-dialog-body{padding:20px}.task-name{font-size:15px}}.upload-course-container{margin:0 auto;max-width:800px}.upload-course-box{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;padding:30px}.upload-course-box h2{border-bottom:2px solid #667eea;color:#333;font-size:24px;margin:0 0 30px;padding-bottom:15px}.course-info-section{background:#f5f7fa;border-radius:8px;margin-bottom:30px;padding:20px}.course-info-section h3{color:#333;font-size:16px;margin:0 0 15px}.info-item{line-height:1.6;margin-bottom:10px}.info-item:last-child{margin-bottom:0}.info-item .label{color:#666;font-size:14px}.info-item .value{color:#333;font-size:14px;font-weight:500}.upload-section{margin-bottom:30px}.form-group label{margin-bottom:12px}.upload-area{margin-bottom:8px}.upload-btn{background:#fff;border:1px dashed #667eea;border-radius:4px;color:#667eea;padding:10px 24px}.upload-btn:hover{background:#f0f2ff;border-color:#4c63d2;color:#4c63d2}.cover-preview{margin-top:15px}.cover-preview img{max-width:400px}.cover-info{background:#fafafa;color:#666;font-size:14px;padding:10px}.video-list{border-radius:8px;margin-top:15px;overflow:hidden}.list-header{background:#fafafa;font-size:14px;font-weight:500;justify-content:space-between}.list-header,.video-item{border-bottom:1px solid #e8e8e8;padding:12px 15px}.video-item{align-items:flex-start;display:flex;gap:10px;transition:all .3s}.video-item:last-child{border-bottom:none}.video-item:hover{background:#fafafa}.video-item.dragging{background:#f0f2ff;opacity:.5}.drag-handle{align-items:flex-start;color:#999;padding-top:8px;transition:color .3s}.video-index{background:#667eea;border-radius:50%;font-size:12px;font-weight:500;height:24px;margin-top:8px;width:24px}.video-info-group{gap:8px}.video-name{color:#666;font-size:12px}.video-title-wrapper{position:relative}.video-title-input{border:1px solid #e8e8e8;border-radius:4px;padding:6px 20px 6px 10px}.video-title-input:focus{box-shadow:0 0 0 2px #667eea1a}.video-title-input.required-empty{border-color:#ff4d4f}.video-title-input.required-empty:focus{border-color:#ff4d4f;box-shadow:0 0 0 2px #ff4d4f1a}.required-mark{color:#ff4d4f;font-size:14px;font-weight:700;pointer-events:none;position:absolute;right:8px;top:50%;transform:translateY(-50%)}.video-size{margin-top:8px}.remove-video-btn{border:1px solid #ff4d4f;border-radius:4px}.preview-video-btn,.remove-video-btn{font-size:12px;margin-top:8px;padding:6px 12px;transition:all .3s;white-space:nowrap}.preview-video-btn{background:#fff;border:1px solid #667eea;border-radius:4px;color:#667eea;margin-right:8px}.preview-video-btn:hover{background:#667eea;color:#fff}.form-actions{padding-top:20px}.cancel-btn,.submit-btn{border-radius:4px}.submit-btn:hover{box-shadow:0 4px 12px #667eea66;transform:translateY(-2px)}.submit-btn:active{transform:translateY(0)}.submit-btn:disabled{cursor:not-allowed;opacity:.6;transform:none}.video-preview-content{animation:slideUp .3s;background:#fff;border-radius:8px;display:flex;flex-direction:column;max-height:90vh;max-width:900px;overflow:hidden;width:90%}.preview-header{align-items:center;border-bottom:1px solid #e8e8e8;display:flex;justify-content:space-between;padding:20px}.preview-header h3{color:#333;flex:1 1;font-size:18px;margin:0 20px 0 0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.close-preview-btn{background:#f5f5f5;border-radius:4px;color:#666;flex-shrink:0;height:32px;width:32px}.close-preview-btn:hover{background:#e8e8e8;color:#333}.preview-video{max-height:calc(90vh - 140px);outline:none}.preview-info{background:#fafafa;border-top:1px solid #e8e8e8;display:flex;justify-content:space-around;padding:15px 20px}.preview-info span{color:#666;font-size:14px}.edit-course-container{margin:0 auto;max-width:800px;padding:20px}.edit-course-box{background:#fff;border-radius:12px;box-shadow:0 2px 8px #0000001a;padding:30px}.edit-course-box h2{border-bottom:2px solid #f0f0f0;color:#333;font-size:24px;margin:0 0 30px;padding-bottom:15px}.error-container,.loading-container{padding:60px 20px;text-align:center}.back-btn,.retry-btn{background:#667eea;color:#fff;margin:0 5px}.back-btn:hover,.retry-btn:hover{background:#5568d3}.form-group label.required:before{color:#ff4d4f;content:"* "}.form-group input[type=tel],.form-group input[type=text],.form-group textarea{border:1px solid #d9d9d9;border-radius:6px;box-sizing:border-box;font-size:14px;padding:10px 12px;transition:all .3s;width:100%}.form-group textarea{font-family:inherit;min-height:100px}.readonly-group input{background:#f5f5f5;color:#999;cursor:not-allowed}.phone-input-group{display:flex;gap:10px;margin-bottom:10px}.phone-input-group input{flex:1 1}.remove-phone-btn{background:#ff4d4f;border:none;border-radius:6px;color:#fff;cursor:pointer;font-size:14px;padding:10px 20px;transition:all .3s}.remove-phone-btn:hover{background:#ff7875}.add-phone-btn{background:#1890ff;border:none;border-radius:6px;color:#fff;cursor:pointer;font-size:14px;padding:8px 16px;transition:all .3s}.add-phone-btn:hover{background:#40a9ff}.cover-preview{border:1px solid #e8e8e8;border-radius:8px;margin-bottom:12px;overflow:hidden}.cover-preview img{display:block;max-height:300px;object-fit:cover;width:100%}.upload-btn{background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:6px;color:#fff;cursor:pointer;display:inline-block;font-size:14px;padding:10px 20px;text-align:center;transition:all .3s}.upload-btn:hover{box-shadow:0 4px 12px #667eea66;transform:translateY(-2px)}.upload-tip{line-height:1.5;margin:8px 0 0}.video-player-section{background:#f5f7fa;border-radius:8px;margin-bottom:16px;padding:16px}.video-player-section h4{color:#666;font-size:14px;font-weight:600;margin:0 0 12px}.video-player-wrapper{background:#000;border-radius:8px;margin-bottom:16px;overflow:hidden}.video-player{background:#000;display:block;max-height:450px;width:100%}.video-episodes{display:flex;flex-wrap:wrap;gap:8px}.episode-btn{background:#fff;border:1px solid #d9d9d9;border-radius:6px;color:#666;cursor:pointer;font-size:14px;font-weight:500;min-width:80px;padding:8px 16px;transition:all .3s}.episode-btn:hover{border-color:#667eea;color:#667eea}.episode-btn.active{background:linear-gradient(135deg,#667eea,#764ba2);border-color:#667eea;box-shadow:0 2px 8px #667eea4d;color:#fff}.existing-videos{background:#f5f7fa;border-radius:8px;margin-bottom:16px;padding:16px}.existing-videos h4{color:#666;font-size:14px;margin:0 0 12px}.video-item{grid-gap:16px;align-items:start;background:#fff;border:1px solid #e8e8e8;border-radius:12px;cursor:move;display:grid;gap:16px;grid-template-columns:auto auto 1fr auto;margin-bottom:16px;overflow:hidden;padding:16px 20px;position:relative;transition:all .3s cubic-bezier(.4,0,.2,1)}.video-item:before{background:linear-gradient(135deg,#667eea,#764ba2);bottom:0;content:"";left:0;opacity:0;position:absolute;top:0;transition:opacity .3s;width:4px}.video-item:hover:before{opacity:1}.video-item:last-child{margin-bottom:0}.video-item.existing{background:linear-gradient(135deg,#fff,#fafafa)}.video-item.dragging{background:linear-gradient(135deg,#f0f2ff,#e8ebff);border:2px dashed #667eea;box-shadow:0 8px 24px #667eea33;opacity:.6;transform:scale(1.02)}.video-item:hover{border-color:#d0d7de;box-shadow:0 4px 16px #00000014;transform:translateY(-2px)}.drag-handle{align-items:center;align-self:center;background:#f5f7fa;border-radius:6px;color:#c0c4cc;cursor:grab;display:flex;flex-shrink:0;height:32px;justify-content:center;transition:all .3s;width:32px}.drag-handle:hover{background:#e8ebff;color:#667eea;transform:scale(1.1)}.drag-handle:active{cursor:grabbing;transform:scale(.95)}.drag-handle svg{height:16px;width:16px}.video-index{align-items:center;align-self:center;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:8px;box-shadow:0 2px 8px #667eea4d;color:#fff;display:flex;flex-shrink:0;font-size:13px;font-weight:600;height:32px;justify-content:center;min-width:48px;padding:0 12px;text-align:center}.video-info-group{align-items:flex-start;display:flex;flex:1 1;flex-direction:column;gap:12px;min-width:0}.video-preview-thumbnail{background:linear-gradient(135deg,#1a1a1a,#2d2d2d);border-radius:8px;box-shadow:0 4px 12px #00000026;flex-shrink:0;height:90px;overflow:hidden;position:relative;transition:transform .3s;width:160px}.video-item:hover .video-preview-thumbnail{transform:scale(1.02)}.video-preview-thumbnail:after{color:#fffc;content:"▶";font-size:24px;left:50%;opacity:0;pointer-events:none;position:absolute;top:50%;transform:translate(-50%,-50%);transition:opacity .3s}.video-preview-thumbnail:hover:after{opacity:1}.video-preview-thumbnail video{display:block;height:100%;object-fit:cover;width:100%}.video-title-wrapper{min-width:0;width:100%}.video-title-input{background:#fafafa;border:1px solid #e0e0e0;border-radius:8px;box-sizing:border-box;color:#333;font-size:14px;font-weight:500;padding:10px 14px;transition:all .3s;width:100%}.video-title-input::placeholder{color:#999;font-weight:400}.video-title-input:focus{background:#fff;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a;outline:none;transform:translateY(-1px)}.video-actions{align-items:flex-end;align-self:center;display:flex;flex-direction:column;flex-shrink:0;gap:10px;justify-content:center}.video-name{color:#333;flex:1 1;font-size:14px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.video-size{color:#999;flex-shrink:0;font-size:13px;white-space:nowrap}.video-list{background:linear-gradient(135deg,#f5f7fa,#fff);border:1px solid #e8e8e8;border-radius:12px;box-shadow:0 2px 8px #0000000a;margin-top:16px;padding:20px}.list-header{border-bottom:2px solid #f0f0f0;color:#333;font-size:15px;font-weight:600;gap:8px;margin-bottom:20px;padding-bottom:12px}.drag-tip,.list-header{align-items:center;display:flex}.drag-tip{color:#999;font-size:12px;font-weight:400;gap:4px;margin-left:auto}.drag-tip:before{content:"↕";font-size:14px}.preview-video-btn{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:8px;box-shadow:0 2px 8px #667eea4d;color:#fff;cursor:pointer;display:flex;flex-shrink:0;font-size:13px;font-weight:500;gap:6px;justify-content:center;padding:8px 16px;transition:all .3s cubic-bezier(.4,0,.2,1)}.preview-video-btn:before{content:"▶";font-size:10px}.preview-video-btn:hover{box-shadow:0 4px 12px #667eea66;transform:translateY(-2px)}.preview-video-btn:active{transform:translateY(0)}.reupload-video-btn{align-items:center;background:#fff;border:1.5px solid #1890ff;border-radius:8px;color:#1890ff;cursor:pointer;display:inline-flex;flex-shrink:0;font-size:13px;font-weight:500;gap:6px;justify-content:center;padding:8px 16px;transition:all .3s cubic-bezier(.4,0,.2,1)}.reupload-video-btn:before{content:"↻";font-size:14px}.reupload-video-btn:hover{background:#1890ff;box-shadow:0 4px 12px #1890ff4d;color:#fff;transform:translateY(-2px)}.reupload-video-btn:active{transform:translateY(0)}.remove-video-btn{align-items:center;background:#fff;border:1.5px solid #ff4d4f;border-radius:8px;color:#ff4d4f;cursor:pointer;display:flex;flex-shrink:0;font-size:13px;font-weight:500;gap:6px;justify-content:center;padding:8px 16px;transition:all .3s cubic-bezier(.4,0,.2,1)}.remove-video-btn:before{content:"×";font-size:16px;font-weight:700}.remove-video-btn:hover{background:#ff4d4f;box-shadow:0 4px 12px #ff4d4f4d;color:#fff;transform:translateY(-2px)}.remove-video-btn:active{transform:translateY(0)}.form-actions{border-top:1px solid #e8e8e8;display:flex;gap:12px;justify-content:flex-end;margin-top:32px;padding-top:24px}.cancel-btn,.submit-btn{border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;padding:10px 32px;transition:all .3s}.cancel-btn:hover:not(:disabled){border-color:#667eea;color:#667eea}.submit-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.submit-btn:hover:not(:disabled){box-shadow:0 4px 12px #667eea66;transform:translateY(-2px)}.cancel-btn:disabled,.submit-btn:disabled{cursor:not-allowed;opacity:.6;transform:none}@media (max-width:768px){.edit-course-container{padding:10px}.edit-course-box{padding:20px}.edit-course-box h2{font-size:20px}.phone-input-group{flex-direction:column;gap:8px}.remove-phone-btn{width:100%}.form-actions{flex-direction:column-reverse}.cancel-btn,.submit-btn{width:100%}.video-player{max-height:250px}.video-episodes{gap:6px}.episode-btn{font-size:13px;min-width:70px;padding:6px 12px}.video-item,.video-list{padding:12px}.video-item{gap:12px;grid-template-columns:1fr}.drag-handle{height:28px;width:28px}.video-index{font-size:12px;height:28px;min-width:40px;padding:0 10px}.video-info-group{flex-direction:column;gap:12px;grid-column:1/-1;width:100%}.video-preview-thumbnail{height:auto;min-height:140px;width:100%}.video-title-wrapper{width:100%}.video-actions{flex-direction:row;flex-wrap:wrap;gap:8px;grid-column:1/-1;justify-content:space-between;width:100%}.preview-video-btn,.remove-video-btn,.reupload-video-btn{flex:1 1;font-size:12px;min-width:90px;padding:8px 12px}}.video-preview-modal{align-items:center;animation:fadeIn .3s;background:#000c;bottom:0;display:flex;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:10000}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.preview-content{animation:slideUp .3s;background:#fff;border-radius:12px;display:flex;flex-direction:column;max-height:90vh;max-width:900px;overflow:hidden;padding:24px;position:relative;width:90%}@keyframes slideUp{0%{opacity:0;transform:translateY(50px)}to{opacity:1;transform:translateY(0)}}.close-preview-btn{align-items:center;background:#00000080;border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;font-size:20px;height:36px;justify-content:center;position:absolute;right:16px;top:16px;transition:all .3s;width:36px;z-index:1}.close-preview-btn:hover{background:#000c;transform:rotate(90deg)}.preview-content h3{color:#333;font-size:18px;margin:0 0 16px}.preview-video{background:#000;border-radius:8px;max-height:70vh;width:100%}.preview-filename{color:#666;font-size:14px;margin:12px 0 0;overflow:hidden;text-align:center;text-overflow:ellipsis;white-space:nowrap}.create-case-container{margin:0 auto;max-width:900px;padding-bottom:80px}.create-case-box{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;padding:30px}.create-case-box h2{border-bottom:2px solid #667eea;color:#333;font-size:24px;margin:0 0 30px;padding-bottom:15px}.image-upload-grid{grid-gap:16px;display:grid;gap:16px;grid-template-columns:repeat(3,1fr);margin-bottom:12px}.image-item{cursor:pointer}.image-item:hover{border-color:#667eea;box-shadow:0 2px 8px #667eea33}.cancel-btn,.publish-btn{border:none;border-radius:4px;cursor:pointer;font-size:14px;font-weight:500;padding:10px 32px;transition:all .3s}.publish-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.publish-btn:hover:not(:disabled){box-shadow:0 4px 12px #667eea66;transform:translateY(-2px)}.publish-btn:active:not(:disabled){transform:translateY(0)}.publish-btn:disabled{cursor:not-allowed;opacity:.6;transform:none}@media (max-width:768px){.create-case-container{padding:0 16px 80px}.create-case-box{padding:20px}.image-upload-grid{gap:12px;grid-template-columns:repeat(2,1fr)}.footer-content{padding:12px 16px}.radio-group{flex-direction:column;gap:12px}}@media (min-width:769px) and (max-width:1024px){.image-upload-grid{grid-template-columns:repeat(3,1fr)}}.edit-case-container{margin:0 auto;max-width:900px;padding-bottom:80px}.edit-case-box{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;padding:30px}.edit-case-box h2{border-bottom:2px solid #667eea;color:#333;font-size:24px;margin:0 0 30px;padding-bottom:15px}.form-section{margin-bottom:30px}.form-group{margin-bottom:24px}.form-group label{color:#333;display:block;font-size:14px;font-weight:500;margin-bottom:8px}.form-group label.required:after{color:#ff4d4f;content:" *"}.form-group input[type=text],.form-group textarea{border:1px solid #d9d9d9;border-radius:4px;box-sizing:border-box;font-family:inherit;font-size:14px;padding:10px 12px;transition:all .3s;width:100%}.form-group input:focus,.form-group textarea:focus{border-color:#667eea;box-shadow:0 0 0 2px #667eea1a;outline:none}.form-group textarea{line-height:1.6;resize:vertical}.char-count{color:#999;font-size:12px;margin-top:4px;text-align:right}.image-display-grid{grid-gap:16px;display:grid;gap:16px;grid-template-columns:repeat(3,1fr);margin-bottom:12px}.image-item{background:#f5f5f5;border:1px solid #d9d9d9;border-radius:4px;overflow:hidden;padding-top:100%;position:relative;transition:all .3s;width:100%}.image-item.readonly{cursor:default}.image-item:not(.readonly):hover{border-color:#667eea;box-shadow:0 2px 8px #667eea33}.image-item img{height:100%;left:0;object-fit:cover;position:absolute;top:0;width:100%}.remove-image-btn{align-items:center;background:#0009;border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;font-size:18px;height:24px;justify-content:center;line-height:1;position:absolute;right:4px;top:4px;transition:all .3s;width:24px;z-index:1}.remove-image-btn:hover{background:#ff4d4fe6;transform:scale(1.1)}.add-image-item{background:#fafafa;border-color:#d9d9d9;border-style:dashed}.add-image-item:hover{background:#f0f2ff;border-color:#667eea}.add-image-btn{align-items:center;color:#999;cursor:pointer;display:flex;flex-direction:column;height:100%;justify-content:center;left:0;position:absolute;top:0;transition:all .3s;width:100%}.add-image-item:hover .add-image-btn{color:#667eea}.add-icon{font-size:32px;font-weight:300;line-height:1;margin-bottom:8px}.add-text{font-size:14px}.no-images{background:#fafafa;border:1px dashed #d9d9d9;border-radius:4px;color:#999;font-size:14px;grid-column:1/-1;padding:40px 20px;text-align:center}.reupload-btn{background:#fff;border:1px solid #667eea;border-radius:4px;color:#667eea;cursor:pointer;font-size:14px;margin-top:8px;padding:8px 20px;transition:all .3s}.reupload-btn:hover{background:#667eea;box-shadow:0 4px 12px #667eea4d;color:#fff;transform:translateY(-2px)}.reupload-btn:active{transform:translateY(0)}.upload-tip{color:#999;font-size:12px;margin-top:8px}.radio-group{display:flex;flex-wrap:wrap;gap:24px}.radio-item{align-items:center;cursor:pointer;display:flex;font-weight:400;margin-bottom:0}.radio-item input[type=radio]{accent-color:#667eea;cursor:pointer;height:18px;margin-right:8px;width:18px}.radio-item span{color:#333;font-size:14px;-webkit-user-select:none;user-select:none}.radio-item:hover span{color:#667eea}.loading-container{padding:60px 20px;text-align:center}.loading-spinner{animation:spin 1s linear infinite;border:4px solid #f3f3f3;border-radius:50%;border-top-color:#667eea;height:50px;margin:0 auto 20px;width:50px}.loading-container p{color:#666;font-size:16px}.error-container{padding:60px 20px;text-align:center}.error-message{color:#ff4d4f;font-size:16px;margin-bottom:20px}.back-btn,.retry-btn{border:none;border-radius:5px;cursor:pointer;font-size:14px;margin:0 8px;padding:10px 30px;transition:all .3s}.retry-btn{background:#667eea;color:#fff}.retry-btn:hover{background:#5568d3;box-shadow:0 4px 12px #667eea4d;transform:translateY(-2px)}.back-btn{background:#fff;border:1px solid #d9d9d9;color:#666}.back-btn:hover{border-color:#999;color:#333}.fixed-footer{background:#fff;border-top:1px solid #e8e8e8;bottom:0;box-shadow:0 -2px 8px #0000001a;left:0;position:fixed;right:0;z-index:100}.footer-content{display:flex;gap:12px;justify-content:flex-end;margin:0 auto;max-width:900px;padding:16px 30px}.cancel-btn,.save-btn{border:none;border-radius:4px;cursor:pointer;font-size:14px;font-weight:500;padding:10px 32px;transition:all .3s}.cancel-btn{background:#fff;border:1px solid #d9d9d9;color:#666}.cancel-btn:hover{border-color:#999;color:#333}.save-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.save-btn:hover:not(:disabled){box-shadow:0 4px 12px #667eea66;transform:translateY(-2px)}.save-btn:active:not(:disabled){transform:translateY(0)}.save-btn:disabled{cursor:not-allowed;opacity:.6;transform:none}@media (max-width:768px){.edit-case-container{padding:0 16px 80px}.edit-case-box{padding:20px}.image-display-grid{gap:12px;grid-template-columns:repeat(2,1fr)}.image-item{padding-top:100%}.footer-content{padding:12px 16px}.radio-group{flex-direction:column;gap:12px}}@media (min-width:769px) and (max-width:1024px){.image-display-grid{grid-template-columns:repeat(3,1fr)}}.main-layout{display:flex;flex:1 1;flex-direction:column;min-height:0}.header{background:linear-gradient(135deg,#667eea,#764ba2);box-shadow:0 2px 8px #0000001a;color:#fff;padding:0 20px}.header-content{align-items:center;display:flex;height:60px;justify-content:space-between;margin:0 auto;max-width:1200px}.logo{font-size:20px;font-weight:700}.user-info{font-size:14px}.tab-container{background:#fff;border-bottom:1px solid #e8e8e8;box-sizing:border-box;display:flex;margin:0 auto;max-width:1200px;padding:0 20px;width:100%}.tab-item{border-bottom:2px solid #0000;color:#666;cursor:pointer;font-weight:500;padding:15px 30px;transition:all .3s}.tab-item:hover{color:#667eea}.tab-item.active{border-bottom-color:#667eea;color:#667eea}.content{background:#f5f5f5;flex:1 1;overflow-y:auto;padding:20px;position:relative}.tab-content{height:100%;width:100%}.app-container{display:flex;flex-direction:column;min-height:100vh}.app-content{display:flex;flex:1 1;flex-direction:column}.beian-footer{background:#00000008;border-top:1px solid #0000000f;flex-shrink:0;padding:12px 20px;text-align:center}.beian-link{align-items:center;color:#666;display:inline-flex;font-size:13px;gap:6px;justify-content:center;text-decoration:none;transition:color .2s}.beian-link:hover{color:#667eea}.beian-icon{height:18px;object-fit:contain;width:18px}.App{text-align:center}.App-logo{height:40vmin;pointer-events:none}@media (prefers-reduced-motion:no-preference){.App-logo{animation:App-logo-spin 20s linear infinite}}.App-header{align-items:center;background-color:#282c34;color:#fff;display:flex;flex-direction:column;font-size:calc(10px + 2vmin);justify-content:center;min-height:100vh}.App-link{color:#61dafb}@keyframes App-logo-spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.global-loading{align-items:center;background:#00000080;bottom:0;display:none;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:9999}.loading-content{align-items:center;display:flex;flex-direction:column;gap:15px}.spinner{animation:spin 1s linear infinite;border:4px solid #ffffff4d;border-radius:50%;border-top-color:#fff;height:40px;width:40px}@keyframes spin{to{transform:rotate(1turn)}}.loading-text{color:#fff;font-size:14px}
/*# sourceMappingURL=main.b3f4726d.css.map*/