.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#056a7b,#0a8fa0,#1ba3b5);padding:var(--spacing-lg)}.login-container{display:grid;grid-template-columns:1fr 1fr;max-width:1200px;width:100%;background:var(--bg-primary);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);overflow:hidden;animation:fadeIn .5s ease-out}.login-left{background:linear-gradient(135deg,#056a7b,#0a8fa0);color:var(--text-light);padding:var(--spacing-2xl);display:flex;flex-direction:column;justify-content:center}.brand-section{display:flex;flex-direction:column;gap:var(--spacing-2xl)}.logo{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-lg)}.logo-icon{flex-shrink:0;display:flex;justify-content:center}.logo-icon img{filter:drop-shadow(0 4px 8px rgba(0,0,0,.2))}.logo-text h1{font-size:2rem;font-weight:700;margin-bottom:var(--spacing-xs);color:var(--text-light)}.logo-text p{font-size:1.125rem;opacity:.9;color:var(--text-light)}.features{display:flex;flex-direction:column;gap:var(--spacing-lg)}.feature-item{display:flex;gap:var(--spacing-md);align-items:flex-start;padding:var(--spacing-md);background:#ffffff1a;border-radius:var(--radius-md);transition:all var(--transition-base)}.feature-item:hover{background:#ffffff26;transform:translate(8px)}.feature-icon{font-size:2rem;flex-shrink:0}.feature-content h3{font-size:1.125rem;font-weight:600;margin-bottom:var(--spacing-xs);color:var(--text-light)}.feature-content p{font-size:.875rem;opacity:.9;line-height:1.5;color:var(--text-light)}.login-right{padding:var(--spacing-2xl);display:flex;align-items:center;justify-content:center}.login-form-container{width:100%;max-width:400px}.login-header{text-align:center;margin-bottom:var(--spacing-xl)}.login-header h2{font-size:1.875rem;font-weight:700;color:var(--primary-color);margin-bottom:var(--spacing-sm)}.login-header p{font-size:1rem;color:var(--text-secondary)}.error-message{background-color:#fee2e2;border:1px solid #fca5a5;color:#991b1b;padding:var(--spacing-md);border-radius:var(--radius-md);margin-bottom:var(--spacing-lg);display:flex;align-items:center;gap:var(--spacing-sm);animation:shake .3s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-10px)}75%{transform:translate(10px)}}.login-form{display:flex;flex-direction:column;gap:var(--spacing-lg)}.login-form .form-group{margin-bottom:0}.login-form label{display:block;margin-bottom:var(--spacing-sm);font-weight:600;color:var(--text-primary);font-size:.875rem;text-transform:uppercase;letter-spacing:.5px}.login-form input{width:100%;padding:var(--spacing-md);border:2px solid var(--gray-300);border-radius:var(--radius-md);font-size:1rem;transition:all var(--transition-base);font-family:inherit}.login-form input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 4px #003d7a1a}.login-form input::placeholder{color:var(--gray-400)}.login-button{width:100%;padding:var(--spacing-md) var(--spacing-xl);background:linear-gradient(135deg,#056a7b,#0a8fa0);color:var(--text-light);border:none;border-radius:var(--radius-md);font-size:1.125rem;font-weight:600;cursor:pointer;transition:all var(--transition-base);margin-top:var(--spacing-md)}.login-button:hover{transform:translateY(-2px);box-shadow:0 8px 16px #056a7b4d}.login-button:active{transform:translateY(0)}.login-footer{margin-top:var(--spacing-xl);padding-top:var(--spacing-lg);border-top:1px solid var(--gray-200);display:flex;flex-direction:column;gap:var(--spacing-sm)}.login-footer .hint{font-size:.875rem;color:var(--text-secondary);display:flex;align-items:center;gap:var(--spacing-sm)}@media (max-width: 968px){.login-container{grid-template-columns:1fr}.login-left{padding:var(--spacing-xl)}.logo-text h1{font-size:1.5rem}.features{display:none}}@media (max-width: 640px){.login-page{padding:var(--spacing-md)}.login-left,.login-right{padding:var(--spacing-lg)}.logo{flex-direction:column;text-align:center}.login-header h2{font-size:1.5rem}}.home-page{min-height:100vh;background:linear-gradient(135deg,#f5f7f9,#e8f1f5)}.navbar .logo-icon{display:flex;align-items:center}.navbar .logo-icon img{filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}.navbar .user-info{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background-color:#ffffff1a;border-radius:var(--radius-md)}.navbar .user-icon{font-size:1.25rem}.navbar .logout-btn{background-color:transparent;color:var(--text-light);border:1px solid rgba(255,255,255,.3);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);display:flex;align-items:center;gap:var(--spacing-sm);font-size:.875rem}.navbar .logout-btn:hover{background-color:#ffffff1a;border-color:#ffffff80;transform:none;box-shadow:none}.header{text-align:center;padding:var(--spacing-2xl) 0;animation:fadeIn .5s ease-out}.header h1{font-size:2.5rem;font-weight:700;color:var(--primary-color);margin-bottom:var(--spacing-sm)}.header p{font-size:1.125rem;color:var(--text-secondary)}.feature-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-2xl)}.feature-card{background:linear-gradient(135deg,#fff,#f8fafb);border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:0 4px 12px #056a7b14;transition:all var(--transition-base);display:flex;flex-direction:column;gap:var(--spacing-md);border:2px solid rgba(5,106,123,.1)}.feature-card:hover{transform:translateY(-6px);box-shadow:0 12px 24px #056a7b26;border-color:var(--primary-light)}.feature-card.featured{border-color:#ffd200;background:linear-gradient(135deg,#fffbf0,#fff8e6);box-shadow:0 8px 20px #ffd20026}.card-icon{font-size:3rem;text-align:center;margin-bottom:var(--spacing-sm)}.feature-card h3{font-size:1.5rem;font-weight:600;color:var(--primary-color);text-align:center;margin-bottom:var(--spacing-sm)}.feature-card p{color:var(--text-secondary);text-align:center;line-height:1.6;flex-grow:1}.card-stats{display:flex;justify-content:center;gap:var(--spacing-lg);padding:var(--spacing-md) 0;border-top:1px solid var(--gray-200);border-bottom:1px solid var(--gray-200)}.card-stats span{font-size:.875rem;color:var(--text-secondary);display:flex;align-items:center;gap:var(--spacing-xs)}.feature-card button{width:100%;padding:var(--spacing-md);font-size:1rem;font-weight:600;margin-top:var(--spacing-sm);border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base)}.feature-card button.primary{background:linear-gradient(135deg,#056a7b,#0a8fa0);color:#fff}.feature-card button.primary:hover{transform:translateY(-2px);box-shadow:0 6px 16px 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input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #003d7a1a}.info-section{background:var(--bg-primary);border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:var(--shadow-md);margin-bottom:var(--spacing-2xl)}.info-section h2{font-size:1.5rem;font-weight:600;color:var(--primary-color);margin-bottom:var(--spacing-lg);display:flex;align-items:center;gap:var(--spacing-sm)}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--spacing-lg)}.info-item{display:flex;gap:var(--spacing-md);padding:var(--spacing-md);background:var(--bg-secondary);border-radius:var(--radius-md);transition:all var(--transition-base)}.info-item:hover{background:var(--gray-100);transform:translate(4px)}.info-icon{font-size:2rem;flex-shrink:0}.info-content h4{font-size:1rem;font-weight:600;color:var(--primary-color);margin-bottom:var(--spacing-xs)}.info-content p{font-size:.875rem;color:var(--text-secondary);line-height:1.5}.tips-section{background:linear-gradient(135deg,#056a7b,#0a8fa0);color:var(--text-light);border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:var(--shadow-lg)}.tips-section h2{font-size:1.5rem;font-weight:600;margin-bottom:var(--spacing-lg);color:var(--text-light);display:flex;align-items:center;gap:var(--spacing-sm)}.tips-list{list-style:none;display:flex;flex-direction:column;gap:var(--spacing-md)}.tips-list li{display:flex;align-items:flex-start;gap:var(--spacing-md);padding:var(--spacing-md);background:#ffffff1a;border-radius:var(--radius-md);transition:all var(--transition-base)}.tips-list li:hover{background:#ffffff26;transform:translate(8px)}.tip-number{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--text-light);color:var(--primary-color);border-radius:50%;font-weight:700;flex-shrink:0}.tips-list li span:last-child{flex:1;line-height:1.6}.tips-list 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140px)}.exam-content::-webkit-scrollbar{width:8px}.exam-content::-webkit-scrollbar-track{background:#f1f1f1;border-radius:10px}.exam-content::-webkit-scrollbar-thumb{background:#888;border-radius:10px}.exam-content::-webkit-scrollbar-thumb:hover{background:#555}.question-navigation{margin-bottom:20px;flex-shrink:0}.question-number{font-size:18px;font-weight:600;color:#333;margin-bottom:16px}.question-number strong{color:#056a7b}.action-buttons{margin-top:20px;padding-top:20px;display:flex;flex-direction:column;gap:16px}.nav-buttons{display:flex;gap:16px;justify-content:space-between;align-items:center}.nav-buttons button{flex:1;padding:12px 20px;font-size:16px;background:#fff;color:#056a7b;border:2px solid #056A7B}.nav-buttons button:hover:not(:disabled){background:#056a7b;color:#fff}.nav-status{font-weight:600;color:#333;text-align:center;flex:0 0 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#0000001a}.grade-value{font-size:48px;font-weight:700;line-height:1;margin-bottom:8px}.grade-label{font-size:18px;font-weight:600}.result-stats{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:30px}.stat-item{background:#fff;border-radius:8px;padding:20px;box-shadow:0 2px 8px #0000000d}.stat-label{display:block;color:#6b7280;font-size:13px;text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}.stat-value{display:block;font-size:32px;font-weight:700;color:#333}.stat-value.correct{color:#10b981}.stat-value.incorrect{color:#ef4444}.feedback{margin-bottom:30px}.feedback-message{padding:16px;border-radius:8px;font-size:16px;line-height:1.6;font-weight:500}.feedback-message.success{background:#f0fdf4;border:1px solid #86efac;color:#166534}.feedback-message.info{background:#f0f9ff;border:1px solid #bfdbfe;color:#0c4a6e}.feedback-message.warning{background:#fffbeb;border:1px solid #fde68a;color:#78350f}.feedback-message.error{background:#fef2f2;border:1px solid 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768px){.admin-header{padding:15px 20px}.header-top{flex-direction:column;gap:10px;align-items:flex-start}.admin-header h1{font-size:20px}.admin-info{flex-direction:column;gap:5px}.admin-tabs{flex-direction:column}.admin-content{padding:20px}.import-section{grid-template-columns:1fr}.format-guide{margin-top:20px}.action-buttons{flex-direction:column}.import-button,.reset-button{width:100%}}.excel-section,.excel-card{background:#fff}.excel-card h2{font-size:20px;margin-bottom:10px;color:#333}.file-input-section{margin-bottom:20px}.file-input-section label{display:block;margin-bottom:10px;font-weight:600;color:#333;font-size:14px}.file-input-section input[type=file]{display:block;padding:10px;border:2px solid #e5e7eb;border-radius:8px;width:100%;cursor:pointer}.file-input-section 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ease}.close-button:hover{background:#d1d5db}.scores-section,.scores-card{background:#fff}.scores-card h2{font-size:20px;margin-bottom:30px;color:#333}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}.stat-item{background:#fff;border-radius:12px;padding:20px;display:flex;align-items:center;gap:15px;color:#333;box-shadow:0 2px 8px #0000001a;border-left:4px solid #056A7B}.stat-icon{font-size:2.5rem;flex-shrink:0}.stat-info{flex:1}.stat-label{font-size:13px;color:#999;margin-bottom:5px}.stat-value{font-size:28px;font-weight:700;color:#056a7b}@media (max-width: 768px){.records-table{font-size:12px}.records-table th,.records-table td{padding:8px}.detail-info{flex-direction:column;gap:10px}.stats-grid{grid-template-columns:1fr}.stat-item{padding:15px}.stat-icon{font-size:2rem}.stat-value{font-size:24px}}.analysis-section{margin-top:30px;padding-top:30px;border-top:2px solid #e5e7eb}.analysis-section 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ease}.bar.excellent{background:linear-gradient(90deg,#10b981,#059669)}.bar.good{background:linear-gradient(90deg,#056a7b,#0a8fa0)}.bar.pass{background:linear-gradient(90deg,#f58232,#e67a1f)}.bar.fail{background:linear-gradient(90deg,#ef4444,#dc2626)}.percentage{font-size:13px;color:#666;text-align:left;font-weight:500}.participation-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}.participation-item{background:#f9fafb;border-radius:12px;padding:20px;border:1px solid #e5e7eb}.participation-label{font-size:14px;color:#666;margin-bottom:10px;font-weight:500}.participation-value{font-size:32px;font-weight:700;color:#056a7b;margin-bottom:15px}.participation-bar{background:#e5e7eb;border-radius:8px;height:8px;overflow:hidden}.participation-fill{background:linear-gradient(90deg,#056a7b,#0a8fa0);height:100%;border-radius:8px;transition:width .3s ease}@media (max-width: 768px){.distribution-item{grid-template-columns:70px 1fr 70px;gap:10px}.score-range,.percentage{font-size:12px}.participation-stats{grid-template-columns:1fr}.participation-value{font-size:24px}}.checkbox-section{margin-bottom:20px;padding:15px;background:#f9fafb;border-radius:8px;border:1px solid #e5e7eb}.checkbox-section label{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:14px;color:#333;margin:0}.checkbox-section input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:#F58232}.checkbox-section span{flex:1}.checkbox-section input[type=checkbox]:disabled{cursor:not-allowed;opacity:.5}:root{--primary-color: #056A7B;--primary-dark: #002234;--primary-light: #0A8FA0;--secondary-color: #0A8FA0;--secondary-dark: #056A7B;--secondary-light: #1BA3B5;--accent-color: #FFD200;--accent-dark: #F58232;--accent-light: #FFE066;--gray-50: #f8f9fa;--gray-100: #e9ecef;--gray-200: #dee2e6;--gray-300: #ced4da;--gray-400: #adb5bd;--gray-500: #6c757d;--gray-600: #495057;--gray-700: #343a40;--gray-800: #212529;--success-color: #10b981;--warning-color: #FFD200;--error-color: #B9283F;--info-color: #056A7B;--bg-primary: #ffffff;--bg-secondary: #f5f7f9;--bg-dark: #056A7B;--text-primary: #212529;--text-secondary: #6c757d;--text-light: #ffffff;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--transition-fast: .15s ease-in-out;--transition-base: .25s ease-in-out;--transition-slow: .35s ease-in-out}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif,Microsoft YaHei;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-secondary);color:var(--text-primary);line-height:1.6}#root{min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-lg);width:100%}button{padding:var(--spacing-sm) var(--spacing-lg);border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:500;cursor:pointer;transition:all var(--transition-base);font-family:inherit}button:hover:not(:disabled){transform:translateY(-1px);box-shadow:var(--shadow-md)}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background-color:var(--primary-color);color:var(--text-light)}button.primary:hover:not(:disabled){background-color:var(--primary-dark)}button.secondary{background-color:transparent;color:var(--primary-color);border:2px solid var(--primary-color)}button.secondary:hover:not(:disabled){background-color:var(--primary-color);color:var(--text-light)}button.accent{background-color:var(--accent-color);color:var(--text-light)}button.accent:hover:not(:disabled){background-color:var(--accent-dark)}button.success{background-color:var(--success-color);color:var(--text-light)}button.danger{background-color:var(--error-color);color:var(--text-light)}button.submit-button{background-color:var(--success-color);color:var(--text-light);padding:var(--spacing-md) var(--spacing-xl);font-size:1.125rem;width:100%;margin-top:var(--spacing-lg)}.back-button{background-color:transparent;color:var(--primary-color);border:2px solid var(--primary-color);margin-top:var(--spacing-lg)}.form-group{margin-bottom:var(--spacing-md)}.form-group label{display:block;margin-bottom:var(--spacing-sm);font-weight:500;color:var(--text-primary)}.form-group input,.form-group select{width:100%;padding:var(--spacing-md);border:2px solid var(--gray-300);border-radius:var(--radius-md);font-size:1rem;font-family:inherit;transition:all var(--transition-base)}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #003d7a1a}.card{background-color:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:var(--spacing-lg);transition:all var(--transition-base)}.card:hover{box-shadow:var(--shadow-lg)}.navbar{background-color:var(--bg-dark);color:var(--text-light);padding:var(--spacing-md) var(--spacing-lg);box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:space-between}.navbar-brand{font-size:1.5rem;font-weight:700;color:var(--text-light);text-decoration:none;display:flex;align-items:center;gap:var(--spacing-md)}.navbar-nav{display:flex;gap:var(--spacing-lg);list-style:none;align-items:center}.navbar-link{color:var(--text-light);text-decoration:none;transition:color var(--transition-base);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-sm)}.navbar-link:hover{color:var(--secondary-light);background-color:#ffffff1a}.error-banner{background-color:var(--error-color);color:var(--text-light);padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-lg);animation:slideDown .3s ease-out;position:fixed;top:0;left:0;right:0;z-index:1000;box-shadow:var(--shadow-lg)}.error-banner button{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-light);padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center}.success-banner{background-color:var(--success-color);color:var(--text-light);padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--radius-md);margin-bottom:var(--spacing-lg)}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.loading-spinner{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--bg-primary);padding:var(--spacing-xl);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);z-index:1001;font-weight:600;color:var(--text-primary);display:flex;align-items:center;gap:var(--spacing-md)}.spinner{display:inline-block;width:24px;height:24px;border:3px solid var(--gray-200);border-top-color:var(--primary-color);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.progress-bar{width:100%;height:8px;background-color:var(--gray-200);border-radius:var(--radius-full);overflow:hidden;margin-top:var(--spacing-sm)}.progress-fill{height:100%;background:linear-gradient(90deg,var(--success-color) 0%,var(--secondary-color) 100%);transition:width var(--transition-base);border-radius:var(--radius-full)}.correct{color:var(--success-color);font-weight:600}.incorrect{color:var(--error-color);font-weight:600}.warning{color:var(--warning-color);font-weight:600}.text-center{text-align:center}.text-primary{color:var(--primary-color)}.text-secondary{color:var(--text-secondary)}.mt-1{margin-top:var(--spacing-xs)}.mt-2{margin-top:var(--spacing-sm)}.mt-3{margin-top:var(--spacing-md)}.mt-4{margin-top:var(--spacing-lg)}.mt-5{margin-top:var(--spacing-xl)}.mb-1{margin-bottom:var(--spacing-xs)}.mb-2{margin-bottom:var(--spacing-sm)}.mb-3{margin-bottom:var(--spacing-md)}.mb-4{margin-bottom:var(--spacing-lg)}.mb-5{margin-bottom:var(--spacing-xl)}@media (max-width: 768px){.container{padding:0 var(--spacing-md)}.navbar{flex-direction:column;gap:var(--spacing-md)}.navbar-nav{flex-direction:column;width:100%}button{padding:var(--spacing-sm) var(--spacing-md);font-size:.875rem}.error-banner{flex-direction:column;gap:var(--spacing-sm)}}