:root{--bg: #f7f8fa;--card: #ffffff;--text: #1f2937;--muted: #6b7280;--border: #e5e7eb;--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--radius: 10px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica,Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}.container{max-width:960px;margin:0 auto;padding:0 16px}.site-header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.header-inner{display:flex;align-items:center;justify-content:space-between;height:56px}.site-logo{font-size:18px;font-weight:700;color:var(--text);text-decoration:none}.lang-toggle{border:1px solid var(--border);background:var(--card);border-radius:999px;padding:6px 14px;font-size:13px;cursor:pointer;color:var(--text)}.lang-toggle:hover{border-color:var(--primary);color:var(--primary)}.site-footer{margin-top:48px;padding:20px 0 32px;border-top:1px solid var(--border);color:var(--muted);font-size:13px;text-align:center}main.container{padding-top:24px;padding-bottom:24px;min-height:60vh}.home-hero h1{font-size:28px;margin:8px 0 12px}.intro{color:var(--muted);font-size:15px;max-width:720px}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin-top:28px}.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;text-decoration:none;color:var(--text);display:flex;flex-direction:column;gap:8px;transition:box-shadow .15s ease,transform .15s ease}.tool-card:hover{box-shadow:0 4px 16px #00000014;transform:translateY(-2px)}.tool-card h2{font-size:17px;margin:0}.tool-card p{font-size:13.5px;color:var(--muted);margin:0;flex:1}.tool-card-go{font-size:13px;color:var(--primary);font-weight:600}.tool-page{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.tool-title{font-size:24px;margin:0 0 8px}.tool-body{margin-top:20px}.disclaimer{margin-top:24px;padding:12px 14px;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;font-size:13px;color:#92400e}.tool-form{display:grid;gap:14px;max-width:560px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media(max-width:560px){.form-row{grid-template-columns:1fr}}.field{display:flex;flex-direction:column;gap:6px}.field>label,.field-label{font-size:14px;font-weight:600}.field input,.field select,.field textarea{border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:15px;font-family:inherit;background:#fff;color:var(--text);width:100%}.field textarea{min-height:140px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px}.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.field .hint{font-size:12.5px;color:var(--muted)}.radio-group{display:flex;gap:16px;flex-wrap:wrap}.radio-group label{display:flex;align-items:center;gap:6px;font-size:14px;cursor:pointer}.btn{border:1px solid var(--border);background:var(--card);border-radius:8px;padding:10px 18px;font-size:15px;cursor:pointer;color:var(--text);text-decoration:none;display:inline-block}.btn:hover{border-color:var(--primary)}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px}.copy-btn{border:1px solid var(--border);background:var(--card);border-radius:6px;padding:4px 12px;font-size:13px;cursor:pointer;color:var(--primary);white-space:nowrap}.copy-btn:hover{border-color:var(--primary)}.copy-btn:disabled{color:var(--muted);cursor:not-allowed}.result-card{margin-top:20px;border:1px solid var(--border);border-radius:var(--radius);padding:18px;background:#fbfcfe}.result-card h3{margin:0 0 12px;font-size:16px}.result-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px dashed var(--border);font-size:15px}.result-row:last-child{border-bottom:none}.result-label{color:var(--muted)}.result-value{font-weight:700;display:flex;align-items:center;gap:8px}.result-highlight .result-value{color:var(--primary);font-size:20px}.result-output{background:#fff;border:1px solid var(--border);border-radius:8px;padding:12px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px;white-space:pre-wrap;word-break:break-all;max-height:320px;overflow:auto;margin:0}.result-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.error-box{margin-top:16px;padding:12px 14px;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;color:var(--danger);font-size:14px;white-space:pre-wrap;word-break:break-word}.empty-hint{margin-top:16px;color:var(--muted);font-size:14px}.table-wrap{overflow-x:auto;margin-top:12px;border:1px solid var(--border);border-radius:8px;max-height:420px;overflow-y:auto}table.data-table{border-collapse:collapse;width:100%;font-size:13.5px;background:#fff}.data-table th,.data-table td{padding:8px 12px;border-bottom:1px solid var(--border);text-align:right;white-space:nowrap}.data-table th:first-child,.data-table td:first-child{text-align:left}.data-table thead th{position:sticky;top:0;background:#f3f4f6;font-weight:600}.qr-preview{margin-top:16px;text-align:center}.qr-preview img{border:1px solid var(--border);border-radius:8px;background:#fff;padding:12px;max-width:100%;height:auto}.chain{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin:12px 0}.chain-chip{background:#eff6ff;border:1px solid #bfdbfe;color:#1d4ed8;border-radius:999px;padding:4px 12px;font-size:14px;display:inline-flex;align-items:center;gap:6px}.chain-chip button{border:none;background:none;cursor:pointer;color:#1d4ed8;font-size:14px;padding:0}.chain-sep{color:var(--muted)}.not-found{text-align:center;padding:64px 0}.not-found h1{font-size:64px;margin:0;color:var(--muted)}@media(max-width:640px){.tool-page{padding:16px}.home-hero h1{font-size:22px}.tool-title{font-size:20px}}.quiz-q{font-size:18px;font-weight:600;margin:8px 0 4px}.quiz-options{display:grid;gap:10px;margin-top:16px}.quiz-opt{text-align:left;border:1px solid var(--border);background:#fff;border-radius:8px;padding:12px 14px;font-size:15px;font-family:inherit;cursor:pointer;color:var(--text)}.quiz-opt:hover{border-color:var(--primary);background:#eff6ff}.quiz-progress{height:8px;background:var(--border);border-radius:4px;overflow:hidden;margin:12px 0}.quiz-progress>div{height:100%;background:var(--primary);transition:width .2s ease}.score-big{font-size:64px;font-weight:800;line-height:1.2}.tier-name{font-size:22px;font-weight:700;margin:8px 0}.poster-wrap{text-align:center;margin-top:16px}.poster-wrap canvas{max-width:100%;height:auto;border-radius:12px;box-shadow:0 8px 24px #00000026}.timer{display:inline-block;font-size:15px;font-weight:700;color:var(--primary);background:#eff6ff;border-radius:999px;padding:4px 14px}.timer.danger{color:var(--danger);background:#fef2f2}.stat-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}.stat-card{border:1px solid var(--border);border-radius:8px;padding:12px;text-align:center;background:#fff}.stat-card .v{font-size:24px;font-weight:800}.stat-card .l{font-size:12.5px;color:var(--muted)}.day-grid{display:grid;grid-template-columns:repeat(14,1fr);gap:4px;margin-top:10px}.day-cell{aspect-ratio:1;border-radius:4px;background:var(--border)}.day-cell.done{background:#22c55e}.day-cell.today{outline:2px solid var(--primary);outline-offset:1px}@media(max-width:560px){.day-grid{grid-template-columns:repeat(7,1fr)}}