:root{--primary: #3E7BFA;--primary-deep: #2C5FD8;--primary-soft: #EEF3FF;--accent: #38C1A1;--success: #22C55E;--danger: #EF4444;--warning: #F59E0B;--bg: #F5F7FB;--card: #FFFFFF;--text-1: #1F2D3D;--text-2: #5C6B7A;--text-3: #9AA8B8;--border: #E4E9F0;--r-sm: 6px;--r-md: 12px;--r-lg: 20px;--shadow: 0 2px 12px rgba(31, 45, 61, .06);--shadow-hover: 0 8px 24px rgba(31, 45, 61, .1)}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,system-ui,sans-serif;background:var(--bg);color:var(--text-1);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-deep)}#app{min-height:100vh;display:flex;flex-direction:column}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}.page{padding:24px 0 64px;flex:1}.page-flat{padding:0}.app-header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.app-header .container{display:flex;align-items:center;height:64px;gap:32px}.app-header .logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:700;color:var(--text-1)}.app-header .logo img{height:36px}.nav{display:flex;gap:4px;flex:1}.nav a{padding:8px 14px;border-radius:var(--r-sm);color:var(--text-2);font-size:15px;transition:all .15s}.nav a:hover{color:var(--primary);background:var(--primary-soft)}.nav a.router-link-active{color:var(--primary);background:var(--primary-soft);font-weight:600}.header-user{display:flex;align-items:center;gap:12px}.header-user .avatar{width:32px;height:32px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px}.header-user .nickname{color:var(--text-1);font-weight:500}.header-user .vip-badge{margin-left:6px;padding:1px 8px;border-radius:999px;font-size:11px;font-weight:700;letter-spacing:.5px;color:#7a4a00;background:linear-gradient(135deg,#ffe7a0,#ffd95c);border:1px solid #F0C44A;vertical-align:1px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:40px;padding:0 20px;border:none;border-radius:var(--r-md);font-size:15px;font-weight:500;cursor:pointer;transition:all .15s;background:var(--primary);color:#fff;text-decoration:none;-webkit-user-select:none;user-select:none}.btn:hover{background:var(--primary-deep)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-deep)}.btn-outline{background:#fff;color:var(--primary);border:1px solid var(--primary)}.btn-outline:hover{background:var(--primary-soft)}.btn-ghost{background:transparent;color:var(--text-2);border:1px solid var(--border)}.btn-ghost:hover{color:var(--primary);border-color:var(--primary)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#dc2626}.btn-sm{height:32px;padding:0 14px;font-size:13px;border-radius:var(--r-sm)}.btn-block{width:100%}.btn:disabled{background:#e4e9f0;color:#9aa8b8;cursor:not-allowed}.btn-outline:disabled{background:#fff;border-color:#e4e9f0;color:#9aa8b8}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:20px 24px}.card-hover{transition:all .2s;cursor:pointer}.card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}.field{margin-bottom:16px}.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px;font-weight:500}.input,.textarea,.select{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--r-sm);font-size:15px;color:var(--text-1);background:#fff;transition:border-color .15s;font-family:inherit}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--primary)}.textarea{min-height:100px;resize:vertical;line-height:1.7}.input-code{font-family:JetBrains Mono,Consolas,monospace;font-size:14px}.tag{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:500}.tag-blue{background:#eef3ff;color:#3e7bfa}.tag-green{background:#e8f9ef;color:#16a34a}.tag-red{background:#feebeb;color:#dc2626}.tag-orange{background:#fff4e5;color:#d97706}.tag-gray{background:#f1f3f7;color:#5c6b7a}.tag-purple{background:#f3effe;color:#7c5cfc}.progress-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.progress-cell{aspect-ratio:1;border-radius:8px;border:1.5px solid var(--border);background:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--text-2);cursor:pointer;transition:all .15s;font-weight:500}.progress-cell:hover{border-color:var(--primary);color:var(--primary)}.progress-cell.done,.progress-cell.correct{background:var(--success);border-color:var(--success);color:#fff}.progress-cell.wrong{background:var(--danger);border-color:var(--danger);color:#fff}.progress-cell.missed{background:#fff;border-color:#e2e6ed;color:#b0b8c4}.progress-cell.pending{background:#eef0f4;border-color:#d6dae2;color:#8a93a3}.progress-cell.current{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-soft);color:var(--primary)}.progress-cell.current.done{color:#fff;box-shadow:0 0 0 3px #3e7bfa40}.option-item{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border:1.5px solid var(--border);border-radius:var(--r-md);cursor:pointer;transition:all .15s;margin-bottom:10px;background:#fff}.option-item:hover{border-color:var(--primary)}.option-item .key{flex-shrink:0;width:28px;height:28px;border-radius:8px;background:var(--bg);display:flex;align-items:center;justify-content:center;font-weight:600;color:var(--text-2);font-size:14px}.option-item .text{flex:1;line-height:1.7}.option-item.selected{border-color:var(--primary);background:var(--primary-soft)}.option-item.selected .key{background:var(--primary);color:#fff}.option-item.right{border-color:var(--success);background:#e8f9ef}.option-item.right .key{background:var(--success);color:#fff}.option-item.wrong{border-color:var(--danger);background:#feebeb}.option-item.wrong .key{background:var(--danger);color:#fff}.empty{text-align:center;padding:60px 20px;color:var(--text-3)}.empty img{width:180px;margin-bottom:16px}.empty .title{font-size:16px;color:var(--text-2);margin-bottom:8px;font-weight:500}.q-block{margin-bottom:20px}.q-block .q-head{display:flex;align-items:flex-start;gap:10px;margin-bottom:12px}.q-block .q-num{flex-shrink:0;min-width:28px;height:28px;padding:0 8px;border-radius:8px;background:var(--primary-soft);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-weight:600;font-size:13px}.q-block .q-title{font-size:16px;line-height:1.8;white-space:pre-wrap;word-break:break-word}.q-block .q-img{max-width:100%;margin:10px 0;border-radius:var(--r-md);border:1px solid var(--border)}.q-section{font-size:17px;font-weight:700;margin:28px 0 16px;padding-left:12px;border-left:4px solid var(--primary)}.table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--r-md);overflow:hidden}.table th{text-align:left;padding:12px 16px;background:var(--bg);font-size:13px;color:var(--text-2);font-weight:600;border-bottom:1px solid var(--border);white-space:nowrap}.table td{padding:12px 16px;border-bottom:1px solid #F1F3F7;font-size:14px}.table tr:hover td{background:#fafbfe}.table .actions{display:flex;gap:8px}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#1f2d3d73;display:flex;align-items:center;justify-content:center;z-index:200;padding:24px}.modal{background:#fff;border-radius:var(--r-lg);padding:28px;width:100%;max-width:560px;max-height:90vh;overflow:auto}.modal h3{margin-bottom:20px;font-size:20px}.modal .close{float:right;cursor:pointer;color:var(--text-3);font-size:20px}.toast-wrap{position:fixed;top:80px;left:50%;transform:translate(-50%);z-index:300;display:flex;flex-direction:column;gap:8px}.toast{background:#1f2d3d;color:#fff;padding:10px 20px;border-radius:10px;font-size:14px;box-shadow:0 8px 24px #0003;animation:toast-in .2s ease}.toast.success{background:var(--success)}.toast.error{background:var(--danger)}@keyframes toast-in{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}.app-footer{border-top:1px solid var(--border);background:var(--card);padding:24px 0;text-align:center;color:var(--text-3);font-size:13px}.app-footer .container{display:flex;flex-direction:column;gap:6px;align-items:center}.app-footer .beian{color:var(--text-3);text-decoration:none;transition:color .2s}.app-footer .beian:hover{color:var(--primary)}