:root{--bg:#f5f6f8;--card:#ffffff;--text:#1f2329;--muted:#6b7280;--border:#e3e6ea;--primary:#2563eb;--primary-dark:#1d4ed8;--green:#16a34a;--red:#dc2626;--amber:#d97706;--radius:10px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.6}a{color:var(--primary);text-decoration:none}button{cursor:pointer}button,input,textarea{font:inherit}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;box-shadow:0 1px 3px rgba(0,0,0,.04)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--border);background:#fff;color:var(--text);border-radius:8px;padding:8px 16px;font-size:14px;transition:background .15s,border-color .15s}.btn:hover{background:#f3f4f6}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-danger{color:var(--red);border-color:#f3c1c1}.btn-danger:hover{background:#fef2f2}.btn-sm{padding:4px 10px;font-size:13px}.btn:disabled{opacity:.5;cursor:not-allowed}.tag-badge{background:#eff6ff;color:var(--primary);border:1px solid #bfdbfe;border-radius:999px}.tag-badge,.type-badge{display:inline-block;padding:1px 10px;font-size:13px}.type-badge{background:#f0fdf4;color:var(--green);border:1px solid #bbf7d0;border-radius:999px}.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px}.dot-star{background:var(--amber)}.dot-wrong{background:var(--red)}.muted{color:var(--muted)}.err-text{color:var(--red)}.ok-text{color:var(--green)}.topbar{display:flex;align-items:center;gap:16px;padding:10px 24px;background:#fff;border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0;z-index:10}.topbar .brand{font-weight:700;font-size:17px;color:var(--text)}.topbar nav{display:flex;gap:6px;flex:1 1}.topbar nav a{padding:6px 12px;border-radius:8px;color:var(--muted);font-size:14px}.topbar nav a:hover{background:#f3f4f6;color:var(--text)}.topbar nav a.active{background:#eff6ff;color:var(--primary)}.topbar .who{font-size:13px;color:var(--muted)}.page{max-width:860px;margin:24px auto;padding:0 16px}.page-wide{max-width:1080px}.q-card{margin:16px 0}.q-head{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-bottom:12px;flex-wrap:wrap}.q-no{font-weight:600;color:var(--text)}.q-text{font-size:17px;line-height:1.8;white-space:pre-wrap;word-break:break-word}.blank{display:inline-block;min-width:5em;border-bottom:2px solid var(--primary);color:transparent}.q-answer-box{margin-top:14px;padding:12px 14px;border-radius:8px;font-size:15px}.q-answer-box.correct{background:#f0fdf4;border:1px solid #bbf7d0}.q-answer-box.wrong{background:#fef2f2;border:1px solid #fecaca}.q-answer-box .label{font-weight:600;margin-right:6px}.q-opts{list-style:none;margin:14px 0 0;padding:0;display:grid;grid-gap:8px;gap:8px}.q-opt{display:flex;align-items:center;gap:10px;border:1px solid var(--border);border-radius:8px;padding:10px 14px;cursor:pointer;background:#fff;transition:border-color .12s,background .12s}.q-opt:hover{border-color:#93c5fd}.q-opt .key{font-weight:600;color:var(--muted);min-width:1.6em}.q-opt.selected{border-color:var(--primary);background:#eff6ff}.q-opt.is-right{border-color:var(--green);background:#f0fdf4}.q-opt.is-wrong{border-color:var(--red);background:#fef2f2}.q-opt.disabled{cursor:default}.q-fill-input{margin-top:14px;display:flex;gap:8px;align-items:center}.q-fill-input input{flex:1 1;padding:9px 12px;border:1px solid var(--border);border-radius:8px}.q-fill-input input:focus{outline:none;border-color:var(--primary)}.q-foot{margin-top:16px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}.q-foot .spacer{flex:1 1}.q-result{font-weight:600}.flow-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.flow-nav{justify-content:space-between;margin-top:18px}.filters,.flow-nav{display:flex;gap:8px}.filters{align-items:center;flex-wrap:wrap}select{font:inherit;padding:6px 10px;border:1px solid var(--border);border-radius:8px;background:#fff}.menu-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));grid-gap:14px;gap:14px;margin-top:16px}.menu-item{display:block;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px;color:var(--text);transition:border-color .12s,box-shadow .12s}.menu-item:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(37,99,235,.08)}.menu-item .mi-title{font-size:16px;font-weight:700}.menu-item .mi-desc{font-size:13px;color:var(--muted);margin-top:6px}.stat-row{display:flex;gap:16px;flex-wrap:wrap;margin:10px 0 4px}.stat-chip{background:#fff;border:1px solid var(--border);border-radius:999px;padding:4px 14px;font-size:13px}.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center}.login-box{width:360px}.login-box h1{font-size:20px;margin:0 0 16px}.field{margin-bottom:12px}.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}.field input{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:8px}.field input:focus{outline:none;border-color:var(--primary)}.err-banner{background:#fef2f2;color:var(--red);border:1px solid #fecaca;border-radius:8px;padding:8px 12px;font-size:14px;margin-bottom:12px}.admin-table{width:100%;border-collapse:collapse;margin-top:12px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.admin-table td,.admin-table th{text-align:left;padding:8px 12px;border-bottom:1px solid var(--border);font-size:14px}.admin-table th{background:#f9fafb;font-weight:600}textarea.upload-area{width:100%;min-height:220px;font-family:ui-monospace,Consolas,monospace;font-size:13px;border:1px solid var(--border);border-radius:8px;padding:10px}textarea.upload-area:focus{outline:none;border-color:var(--primary)}.section-title{font-size:18px;font-weight:700;margin:24px 0 8px}.form-row{display:flex;gap:8px;align-items:center;margin:8px 0}.form-row textarea{font-family:ui-monospace,Consolas,monospace;font-size:13px;min-height:120px;width:100%;border:1px solid var(--border);border-radius:8px;padding:10px}