.toast-enter-active[data-v-50dab7ce],.toast-leave-active[data-v-50dab7ce]{transition:all .3s ease}.toast-enter-from[data-v-50dab7ce],.toast-leave-to[data-v-50dab7ce]{opacity:0;transform:translate(100%)}*{margin:0;padding:0;box-sizing:border-box}:root,[data-theme=blue]{--primary: #4f46e5;--primary-hover: #4338ca;--primary-2: #6366f1;--primary-soft: #eef2ff;--primary-rgb: 79, 70, 229;--sidebar-bg: #1e293b;--sidebar-hover: #334155;--sidebar-active: #0f172a;--login-c1: #0f172a;--login-c2: #1e293b;--login-c3: #312e81}[data-theme=green]{--primary: #059669;--primary-hover: #047857;--primary-2: #10b981;--primary-soft: #ecfdf5;--primary-rgb: 5, 150, 105;--sidebar-bg: #064e3b;--sidebar-hover: #065f46;--sidebar-active: #022c22;--login-c1: #022c22;--login-c2: #064e3b;--login-c3: #10b981}[data-theme=purple]{--primary: #7c3aed;--primary-hover: #6d28d9;--primary-2: #a78bfa;--primary-soft: #f5f3ff;--primary-rgb: 124, 58, 237;--sidebar-bg: #2e1065;--sidebar-hover: #4c1d95;--sidebar-active: #1e1b4b;--login-c1: #1e1b4b;--login-c2: #2e1065;--login-c3: #a78bfa}:root{--danger: #ef4444;--danger-hover: #dc2626;--success: #10b981;--success-bg: #ecfdf5;--warning: #f59e0b;--warning-bg: #fffbeb;--text: #1e293b;--text-secondary: #64748b;--text-muted: #94a3b8;--border: #e2e8f0;--bg: #f1f5f9;--card-bg: #fff;--radius: 8px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07), 0 2px 4px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1), 0 4px 6px rgba(0, 0, 0, .05);--transition: .2s ease}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}.admin-page{display:flex;width:100%;height:100vh;overflow:hidden}.login-page{width:100%;height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--login-c1) 0%,var(--login-c2) 50%,var(--login-c3) 100%);position:relative;overflow:hidden}.login-page:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 70%,rgba(var(--primary-rgb),.12) 0%,transparent 50%),radial-gradient(circle at 70% 30%,rgba(16,185,129,.06) 0%,transparent 50%);animation:loginBg 20s ease-in-out infinite}@keyframes loginBg{0%,to{transform:translate(0)}50%{transform:translate(-2%,-1%)}}.login-box{background:var(--card-bg);padding:48px 40px;border-radius:16px;width:400px;box-shadow:0 25px 50px #00000040;position:relative;z-index:1}.login-box .logo{text-align:center;margin-bottom:32px}.login-box .logo .icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-size:24px;margin-bottom:12px}.login-box h1{font-size:1.35em;font-weight:700;color:var(--text);letter-spacing:-.01em}.login-box .sub{font-size:.85em;color:var(--text-secondary);margin-top:4px}.login-box .form-group{margin-bottom:18px}.login-box label{display:block;font-size:.82em;font-weight:600;color:var(--text-secondary);margin-bottom:6px}.login-box input{width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:.95em;transition:all var(--transition);background:var(--bg)}.login-box input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(var(--primary-rgb),.12);background:#fff}.login-box button{width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:.95em;font-weight:600;cursor:pointer;margin-top:4px;transition:all var(--transition);letter-spacing:.02em}.login-box button:hover{background:var(--primary-hover);box-shadow:0 4px 12px rgba(var(--primary-rgb),.3);transform:translateY(-1px)}.login-box button:active{transform:translateY(0)}.login-box .error{color:var(--danger);font-size:.82em;text-align:center;margin-top:12px;display:none;padding:8px;background:#fef2f2;border-radius:6px}.login-box .error.show{display:block}.sidebar{width:220px;min-width:220px;background:var(--sidebar-bg);color:#cbd5e1;display:flex;flex-direction:column;-webkit-user-select:none;user-select:none}.sidebar .brand{padding:20px 20px 16px;display:flex;align-items:center;gap:10px;border-bottom:1px solid rgba(255,255,255,.06)}.sidebar .brand .icon{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-2));display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px}.sidebar .brand h2{font-size:.95em;font-weight:700;color:#f1f5f9}.sidebar nav{flex:1;padding:12px 0}.sidebar nav a{display:flex;align-items:center;gap:10px;padding:11px 20px;color:#94a3b8;text-decoration:none;font-size:.88em;cursor:pointer;transition:all var(--transition);border-left:3px solid transparent;font-weight:500}.sidebar nav a .nav-icon{font-size:1.1em;width:22px;text-align:center;flex-shrink:0}.sidebar nav a:hover{background:var(--sidebar-hover);color:#e2e8f0}.sidebar nav a.active{background:var(--sidebar-active);color:#fff;border-left-color:var(--primary)}.sidebar .logout{padding:16px 20px;border-top:1px solid rgba(255,255,255,.06)}.sidebar .logout button{width:100%;padding:9px;background:#ffffff0d;color:#94a3b8;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);cursor:pointer;font-size:.84em;transition:all var(--transition);display:flex;align-items:center;justify-content:center;gap:6px}.sidebar .logout button:hover{color:#fff;border-color:var(--danger);background:#ef44441a}.main{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}.main-header{padding:14px 28px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-sm)}.main-header h3{font-size:1em;font-weight:700;color:var(--text)}.main-header .breadcrumb{font-size:.8em;color:var(--text-muted)}.main-body{flex:1;overflow-y:auto;padding:24px 28px}.stats-row{display:flex;gap:16px;margin-bottom:24px;flex-wrap:wrap}.stat-card{flex:1;min-width:180px;background:#fff;border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow);display:flex;align-items:center;gap:14px;transition:all var(--transition);cursor:default;border:1px solid var(--border)}.stat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.stat-card .stat-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}.stat-card .stat-icon.blue{background:var(--primary-soft);color:var(--primary)}.stat-card .stat-icon.green{background:#ecfdf5;color:#10b981}.stat-card .stat-icon.amber{background:#fffbeb;color:#f59e0b}.stat-card .stat-icon.purple{background:#f5f3ff;color:#8b5cf6}.stat-card .stat-info .stat-num{font-size:1.5em;font-weight:700;color:var(--text);line-height:1.1}.stat-card .stat-info .stat-label{font-size:.8em;color:var(--text-secondary);margin-top:2px}.btn{padding:7px 16px;border:none;border-radius:6px;cursor:pointer;font-size:.84em;font-weight:600;transition:all var(--transition);display:inline-flex;align-items:center;gap:5px;white-space:nowrap}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover);box-shadow:0 2px 8px rgba(var(--primary-rgb),.25)}.btn-secondary{background:#fff;color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg);border-color:#cbd5e1}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:var(--danger-hover);box-shadow:0 2px 8px #ef444440}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#059669}.btn-warning{background:var(--warning);color:#fff}.btn-warning:hover{background:#d97706}.btn-sm{padding:4px 10px;font-size:.78em;border-radius:5px}.btn-xs{padding:2px 8px;font-size:.72em;border-radius:4px}.btn:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.btn-group{display:flex;gap:4px}.table-wrap{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--border)}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border);font-size:.85em}.table th{background:#f8fafc;font-weight:700;color:var(--text-secondary);font-size:.8em;text-transform:none;letter-spacing:0;white-space:nowrap}.table td{color:var(--text)}.table tbody tr{transition:background var(--transition)}.table tbody tr:nth-child(2n){background:#f8fafc}.table tbody tr:hover{background:var(--primary-soft)}.table .ops{white-space:nowrap}.table .ops .btn{margin-right:4px}input,select,textarea{padding:8px 12px;border:1.5px solid var(--border);border-radius:6px;font-size:.9em;font-family:inherit;transition:all var(--transition);background:#fff}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(var(--primary-rgb),.1)}.toolbar{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap;align-items:center}.toolbar input,.toolbar select{padding:7px 12px}.toolbar .spacer{flex:1}.feat-tag{display:inline-block;padding:3px 10px;border-radius:12px;font-size:.76em;margin:1px;cursor:pointer;transition:all var(--transition);font-weight:600;-webkit-user-select:none;user-select:none}.feat-tag.on{background:var(--primary-soft);color:var(--primary);border:1px solid rgba(var(--primary-rgb),.35)}.feat-tag.on:hover{background:rgba(var(--primary-rgb),.12)}.feat-tag.off{background:#f1f5f9;color:#94a3b8;border:1px solid #e2e8f0}.feat-tag.off:hover{background:#e2e8f0}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0f172a80;z-index:1000;display:flex;justify-content:center;align-items:flex-start;padding-top:60px;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);animation:fadeIn .15s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.modal-content{background:#fff;border-radius:12px;width:90%;max-width:600px;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:slideUp .2s ease}.modal-header{padding:18px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.modal-header h3{font-size:1.05em;font-weight:700}.modal-close{background:none;border:none;font-size:1.3em;cursor:pointer;color:var(--text-muted);width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all var(--transition)}.modal-close:hover{background:var(--bg);color:var(--text)}.modal-body{padding:20px 24px}.modal-footer{padding:14px 24px;border-top:1px solid var(--border);display:flex;gap:10px;justify-content:flex-end}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:.82em;font-weight:600;color:var(--text-secondary);margin-bottom:5px}.form-group input,.form-group select,.form-group textarea{width:100%}.form-row{display:flex;gap:14px}.form-row .form-group{flex:1}.form-hint{font-size:.78em;color:var(--text-muted);margin-top:3px}.toggle-switch{position:relative;display:inline-block;width:42px;height:24px;cursor:pointer}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;top:0;left:0;right:0;bottom:0;background:#cbd5e1;border-radius:24px;transition:all var(--transition)}.toggle-slider:before{content:"";position:absolute;height:18px;width:18px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:all var(--transition)}.toggle-switch input:checked+.toggle-slider{background:var(--primary)}.toggle-switch input:checked+.toggle-slider:before{transform:translate(18px)}.tabs{display:flex;gap:4px;margin-bottom:20px;background:#f1f5f9;padding:4px;border-radius:10px}.tab-btn{padding:8px 20px;background:transparent;border:none;border-radius:8px;cursor:pointer;font-size:.85em;font-weight:600;color:var(--text-secondary);transition:all var(--transition)}.tab-btn.active{background:#fff;color:var(--primary);box-shadow:var(--shadow-sm)}.tab-btn:hover:not(.active){color:var(--text)}.problem-layout{display:flex;height:calc(100vh - 110px)}.problem-sidebar{width:300px;min-width:300px;border-right:1px solid var(--border);background:#fff;display:flex;flex-direction:column;overflow:hidden;border-radius:var(--radius) 0 0 var(--radius)}.problem-sidebar-header{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.problem-list{flex:1;overflow-y:auto}.problem-item{padding:12px 16px;cursor:pointer;border-left:3px solid transparent;border-bottom:1px solid var(--border);transition:all var(--transition)}.problem-item:hover{background:var(--bg)}.problem-item.active{background:var(--primary-soft);border-left-color:var(--primary)}.problem-item .ptitle{font-size:.88em;font-weight:600}.problem-item .pmeta{font-size:.75em;color:var(--text-muted);margin-top:3px}.problem-editor{flex:1;overflow-y:auto;padding:20px 24px;background:#fff;border-radius:0 var(--radius) var(--radius) 0}.typing-section{background:#f8fafc;border:1px solid var(--border);border-radius:8px;padding:16px;margin-top:14px}.typing-section h4{font-size:.85em;font-weight:700;margin-bottom:12px;color:var(--text)}#toast-container{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:8px}.toast{padding:12px 20px;border-radius:8px;color:#fff;font-size:.85em;font-weight:600;box-shadow:var(--shadow-md);animation:toastIn .3s ease;max-width:380px;display:flex;align-items:center;gap:8px;cursor:pointer}.toast.success{background:#059669}.toast.error{background:var(--danger)}.toast.warning{background:#d97706}.toast.info{background:var(--primary)}@keyframes toastIn{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}.pagination-bar{display:flex;align-items:center;justify-content:center;gap:16px}.pagination-bar.sidebar-pagination{flex-wrap:wrap;gap:8px 12px;justify-content:flex-start}.pagination-bar .pagination-total{font-size:.82em;color:var(--text-muted)}.pagination-bar .pagination-size{display:inline-flex;align-items:center;gap:6px;font-size:.82em;color:var(--text-muted)}.pagination-bar .pagination-size select{height:32px;padding:0 8px;border:1px solid var(--border);border-radius:6px;background:#fff;color:var(--text);font-size:.85em;cursor:pointer}.pagination{display:flex;align-items:center;gap:4px}.pagination button{min-width:34px;height:34px;padding:0 8px;border:1px solid var(--border);background:#fff;border-radius:6px;cursor:pointer;font-size:.82em;font-weight:600;color:var(--text);transition:all var(--transition)}.pagination button:hover:not(:disabled):not(.active){border-color:var(--primary);color:var(--primary)}.pagination button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.pagination button:disabled{opacity:.4;cursor:not-allowed}.empty-state{text-align:center;padding:48px 24px;color:var(--text-muted)}.empty-state .empty-icon{font-size:40px;margin-bottom:12px;opacity:.5}.empty-state p{font-size:.9em}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.section-header h4{font-size:.95em;font-weight:700}.badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:12px;font-size:.75em;font-weight:600}.badge-success{background:var(--success-bg);color:#059669}.badge-warning{background:var(--warning-bg);color:#b45309}.badge-danger{background:#fef2f2;color:#dc2626}.badge-default{background:#f1f5f9;color:#64748b}.badge-secondary{background:var(--primary-soft);color:var(--primary)}.spinner{display:inline-block;width:18px;height:18px;border:2px solid #e2e8f0;border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.check-label{display:inline-flex;align-items:center;gap:5px;cursor:pointer;font-size:.88em;-webkit-user-select:none;user-select:none}.check-label input[type=checkbox]{accent-color:var(--primary);width:auto}.main-header .header-right{display:flex;align-items:center;gap:14px}.theme-switcher{display:flex;align-items:center;gap:8px}.theme-switcher .sw-label{font-size:.78em;color:var(--text-muted);font-weight:600}.theme-dots{display:flex;gap:7px}.theme-dot{width:22px;height:22px;border-radius:50%;cursor:pointer;border:2px solid rgba(255,255,255,.6);transition:all var(--transition);position:relative;box-shadow:var(--shadow-sm)}.theme-dot:hover{transform:scale(1.15)}.theme-dot.active{border-color:var(--text);box-shadow:0 0 0 3px rgba(var(--primary-rgb),.2)}.theme-dot.active:after{content:"✓";position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:700;line-height:1}.theme-dot.blue{background:linear-gradient(135deg,#4f46e5,#6366f1)}.theme-dot.green{background:linear-gradient(135deg,#059669,#10b981)}.theme-dot.purple{background:linear-gradient(135deg,#7c3aed,#a78bfa)}.tabs-bar{display:flex;align-items:center;gap:12px;padding:8px 20px;background:var(--bg);border-bottom:1px solid var(--border)}.tabs-scroll{flex:1;display:flex;gap:6px;overflow-x:auto;scrollbar-width:thin;padding:2px}.tabs-scroll::-webkit-scrollbar{height:4px}.tabs-scroll::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.tab-item{display:inline-flex;align-items:center;gap:7px;flex-shrink:0;padding:6px 12px;background:var(--card-bg);border:1px solid var(--border);border-radius:8px;cursor:pointer;font-size:.82em;font-weight:600;color:var(--text-secondary);-webkit-user-select:none;user-select:none;transition:all var(--transition);box-shadow:var(--shadow-sm)}.tab-item:hover{border-color:var(--primary);color:var(--text)}.tab-item.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(var(--primary-rgb),.25)}.tab-item .tab-dot{width:7px;height:7px;border-radius:50%;background:var(--primary);flex-shrink:0}.tab-item.active .tab-dot{background:#fff}.tab-item .tab-label{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tab-item .tab-close{width:16px;height:16px;border-radius:4px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;line-height:1;color:var(--text-muted);opacity:0;transition:all var(--transition);flex-shrink:0}.tab-item:hover .tab-close,.tab-item.active .tab-close{opacity:1}.tab-item .tab-close:hover{background:#0000001f;color:#fff}.tab-item.active .tab-close:hover{background:#ffffff47}.tabs-actions{display:flex;gap:6px;flex-shrink:0}.tabs-btn{padding:5px 10px;background:var(--card-bg);border:1px solid var(--border);border-radius:6px;cursor:pointer;font-size:.76em;font-weight:600;color:var(--text-secondary);transition:all var(--transition);white-space:nowrap}.tabs-btn:hover{color:var(--primary);border-color:var(--primary)}.student-page{max-width:650px;margin:0 auto;padding:15px;min-height:100vh;background-color:#f5f5f5;color:#333;line-height:1.6;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif}.student-page .header{text-align:center;padding:20px 0;background-color:#fff;border-radius:10px;margin-bottom:15px;box-shadow:0 2px 10px #0000000d}.student-page .header h1{font-size:20px;color:#1a8cff;margin-bottom:8px}.student-page .header p{font-size:14px;color:#666}.student-page .btn-container{display:flex;flex-direction:column;gap:15px;margin-bottom:25px}.student-page .btn{padding:15px;background-color:#1a8cff;color:#fff;border:none;border-radius:8px;font-size:16px;text-align:center;cursor:pointer;transition:all .3s;box-shadow:0 2px 5px #0000001a}.student-page .btn:hover{background-color:#0077e6;transform:translateY(-2px);box-shadow:0 4px 8px #00000026}.student-page .btn:active{transform:translateY(0)}.student-page .btn:disabled{background-color:#ccc;cursor:not-allowed;transform:none}.student-page .btn-help{background-color:#f90}.student-page .btn-help:hover{background-color:#e68a00}.student-page .card{background-color:#fff;border-radius:10px;padding:20px;margin-bottom:15px;box-shadow:0 2px 10px #0000000d}.student-page .card h2{font-size:18px;margin-bottom:15px;color:#333;border-bottom:1px solid #eee;padding-bottom:10px}.student-page .history-item{padding:12px 0;border-bottom:1px dashed #eee;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:flex-start}.student-page .history-main{flex:0 0 auto;max-width:25%;min-width:0}.student-page .history-btns{flex:1;display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end;max-width:100%;min-width:0}.student-page .history-btns button{flex:1 1 auto;min-width:0;white-space:nowrap}.student-page .history-item:last-child{border-bottom:none}.student-page .history-info{font-size:15px}.student-page .history-date{color:#999;font-size:13px}.student-page .page-header{display:flex;align-items:center;margin-bottom:20px}.student-page .back-btn{width:30px;height:30px;display:flex;align-items:center;justify-content:center;background:#f0f0f0;border-radius:50%;margin-right:10px;cursor:pointer}.student-page .page-title{font-size:18px;font-weight:700}.student-page .form-group{margin-bottom:20px}.student-page .form-label{display:block;margin-bottom:8px;font-size:15px;color:#333}.student-page .form-control{width:100%;padding:12px 15px;border:1px solid #ddd;border-radius:6px;font-size:15px;background-color:#f9f9f9}.student-page .form-control:focus{border-color:#1a8cff;outline:none;background-color:#fff}.student-page .form-control::placeholder{color:#aaa}.student-page .error-message{color:#ff4d4f;font-size:13px;margin-top:5px;display:none}.student-page .error-message.show{display:block}.student-page .submit-btn{width:100%;padding:15px;background-color:#1a8cff;color:#fff;border:none;border-radius:8px;font-size:16px;cursor:pointer;margin-top:10px}.student-page .success-message{background-color:#f6ffed;border:1px solid #b7eb8f;color:#52c41a;padding:15px;border-radius:6px;margin-top:15px;display:none}.student-page .success-message.show{display:block}.student-page .upload-area{border:2px dashed #ddd;border-radius:8px;padding:25px;text-align:center;margin-bottom:15px;cursor:pointer;transition:all .3s;background-color:#fafafa}.student-page .upload-area:hover{border-color:#1a8cff;background-color:#f0f8ff}.student-page .upload-area.dragover{border-color:#1a8cff;background-color:#e6f7ff}.student-page .upload-icon{font-size:40px;color:#1a8cff;margin-bottom:10px}.student-page .upload-text{font-size:16px;color:#666;margin-bottom:5px}.student-page .upload-hint{font-size:13px;color:#999}.student-page .image-preview{margin-top:15px;text-align:center;display:none}.student-page .image-preview.show{display:block}.student-page .preview-img{max-width:100%;max-height:200px;border-radius:6px;box-shadow:0 2px 8px #0000001a}.student-page .preview-actions{margin-top:10px;display:flex;justify-content:center;gap:10px}.student-page .preview-btn{padding:6px 12px;background-color:#f0f0f0;border:none;border-radius:4px;font-size:13px;cursor:pointer;transition:background-color .3s}.student-page .preview-btn:hover{background-color:#e0e0e0}.student-page .preview-btn.delete{color:#ff4d4f}.student-page .enter-study-btn{padding:8px 16px;background:linear-gradient(135deg,#52c41a,#389e0d);color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:700;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 4px #52c41a33}.student-page .enter-study-btn:hover{background:linear-gradient(135deg,#73d13d,#52c41a);transform:translateY(-2px);box-shadow:0 4px 8px #52c41a4d}.student-page .enter-study-btn:active{transform:translateY(0);box-shadow:0 2px 4px #52c41a33}.student-page .file-input{display:none}.student-page .qrcode-container{margin:20px 0;text-align:center}.student-page .qrcode-container iframe{width:100%!important;max-width:300px!important}.student-page .login-tip{text-align:center;color:#666;font-size:14px;margin-top:10px}.student-page .login-success{background-color:#f6ffed;border:1px solid #b7eb8f;color:#52c41a;padding:10px 15px;border-radius:6px;margin-bottom:15px;display:none;justify-content:space-between;align-items:center}.student-page .login-success.show{display:flex}.student-page .logout-btn{background-color:#ff4d4f;color:#fff;border:none;padding:5px 15px;border-radius:4px;cursor:pointer;font-size:13px;transition:background-color .3s}.student-page .logout-btn:hover{background-color:#ff7875}.student-page .enter-exam-btn{padding:8px 16px;background:linear-gradient(135deg,#1a8cff,#0077e6);color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:700;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 4px #1a8cff33}.student-page .enter-exam-btn:hover{background:linear-gradient(135deg,#40a9ff,#1a8cff);transform:translateY(-2px);box-shadow:0 4px 8px #1a8cff4d}.student-page .enter-exam-btn:active{transform:translateY(0);box-shadow:0 2px 4px #1a8cff33}.student-page .exam-modal{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;z-index:1000;display:flex;align-items:center;justify-content:center}.student-page .exam-modal-content{background-color:#fff;border-radius:12px;width:90%;max-width:500px;max-height:80vh;display:flex;flex-direction:column;box-shadow:0 4px 20px #00000026}.student-page .exam-modal-header{display:flex;justify-content:space-between;align-items:center;padding:15px 20px;border-bottom:1px solid #eee}.student-page .exam-modal-header h3{font-size:18px;margin:0;color:#333}.student-page .exam-modal-close{background:none;border:none;font-size:28px;color:#999;cursor:pointer;padding:0;width:30px;height:30px;display:flex;align-items:center;justify-content:center;transition:color .3s}.student-page .exam-modal-close:hover{color:#333}.student-page .exam-modal-body{padding:20px;overflow-y:auto;flex:1}.student-page .exam-item{background-color:#f9f9f9;border-radius:8px;padding:15px;margin-bottom:15px;border:1px solid #eee}.student-page .exam-info{margin-bottom:12px}.student-page .exam-title{font-size:16px;font-weight:700;color:#333;margin-bottom:8px}.student-page .exam-detail{font-size:14px;color:#666;margin-bottom:8px}.student-page .exam-time{font-size:13px;color:#999}.student-page .exam-time div{margin-bottom:4px}.student-page .exam-actions{display:flex;gap:10px}.student-page .exam-btn{flex:1;padding:10px;border:none;border-radius:6px;font-size:14px;font-weight:700;cursor:pointer;transition:all .3s ease}.student-page .exam-btn-mock{background:linear-gradient(135deg,#f90,#e68a00);color:#fff}.student-page .exam-btn-mock:hover{background:linear-gradient(135deg,#ffad33,#f90);transform:translateY(-2px);box-shadow:0 4px 8px #ff99004d}.student-page .exam-btn-formal{background:linear-gradient(135deg,#52c41a,#389e0d);color:#fff}.student-page .exam-btn-formal:hover{background:linear-gradient(135deg,#73d13d,#52c41a);transform:translateY(-2px);box-shadow:0 4px 8px #52c41a4d}.student-page .exam-btn:active{transform:translateY(0)}.student-page .exam-link{flex:1;padding:10px;border:none;border-radius:6px;font-size:14px;font-weight:700;text-align:center;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;transition:all .3s ease;cursor:pointer}.student-page .exam-link-mock{background:linear-gradient(135deg,#f90,#e68a00);color:#fff}.student-page .exam-link-mock:hover{background:linear-gradient(135deg,#ffad33,#f90);transform:translateY(-2px);box-shadow:0 4px 8px #ff99004d}.student-page .exam-link.disabled{background-color:#ccc;color:#999;cursor:not-allowed;pointer-events:none}.student-page .exam-link.disabled:hover{transform:none;box-shadow:none}.student-page .face-video{width:100%;max-height:260px;border-radius:10px;background:#000;object-fit:cover;margin:10px 0}.student-page .face-photo{width:200px;max-height:240px;object-fit:cover;border-radius:10px;box-shadow:0 2px 8px #0000001a;margin:10px 0}.student-page .face-tip{font-size:13px;color:#666;margin-bottom:4px}.student-page .face-msg{font-size:13px;color:#ff4d4f;margin-top:10px;min-height:18px}.student-page .face-btn-group{display:flex;gap:10px;justify-content:center;margin-top:12px}.student-page .face-btn{flex:1;max-width:160px;padding:10px;border:none;border-radius:6px;font-size:14px;font-weight:700;cursor:pointer;color:#fff;transition:all .3s}.student-page .face-btn-primary{background:linear-gradient(135deg,#1a8cff,#0077e6)}.student-page .face-btn-primary:hover{background:linear-gradient(135deg,#40a9ff,#1a8cff)}.student-page .face-btn-danger{background:linear-gradient(135deg,#ff4d4f,#d9363e)}.student-page .face-btn-danger:hover{background:linear-gradient(135deg,#ff7875,#ff4d4f)}.student-page .face-btn-cancel{background:#d9d9d9;color:#333}.student-page .face-btn-cancel:hover{background:#bfbfbf}
