:root{color-scheme:light;--bg: #f5f7fb;--surface: #ffffff;--surface-muted: #eef2f7;--text: #172033;--muted: #5d6b82;--border: #d9e1ec;--brand: #1f6feb;--brand-dark: #174ea6;--error-bg: #fff1f1;--error-border: #e25555;--error-text: #9b1c1c;--warning-bg: #fff7e8;--warning-border: #e09b22;--warning-text: #8a5400;--fix-bg: #ecfdf3;--fix-border: #2e9d62;--fix-text: #17663c;--shadow: 0 14px 34px rgba(23, 32, 51, .08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body{min-width:320px;margin:0;background:var(--bg);color:var(--text);line-height:1.6}a{color:inherit;text-decoration:none}button,textarea{font:inherit}.container{width:min(100% - 32px,1200px);margin-inline:auto}.site-header{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--border);background:#fffffff0;backdrop-filter:blur(12px)}.header-inner,.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}.header-inner{min-height:68px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:760}.brand-mark{display:grid;width:34px;height:34px;place-items:center;border-radius:8px;background:var(--brand);color:#fff}.site-nav{display:flex;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:.95rem}.site-nav a:hover{color:var(--brand)}.site-main{padding:42px 0 56px}.site-footer{border-top:1px solid var(--border);color:var(--muted);font-size:.95rem}.footer-inner{min-height:82px}.hero,.tool-page{padding-top:14px}.eyebrow{margin:0 0 10px;color:var(--brand);font-size:.88rem;font-weight:700}h1,h2,p{margin-top:0}h1{max-width:780px;margin-bottom:12px;font-size:clamp(2.2rem,5vw,4rem);line-height:1.08;letter-spacing:0}h2{margin-bottom:8px;font-size:1.25rem;line-height:1.3;letter-spacing:0}.hero-copy,.page-title p,.section-heading p{max-width:760px;color:var(--muted);font-size:1.08rem}.section{padding-top:42px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:18px}.tool-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.tool-grid-single{max-width:460px}.tool-card{display:flex;min-height:210px;flex-direction:column;justify-content:space-between;border:1px solid var(--border);border-radius:8px;background:var(--surface);padding:22px;box-shadow:var(--shadow);transition:border-color .16s ease,transform .16s ease}.tool-card:hover{border-color:var(--brand);transform:translateY(-2px)}.tool-card h2{margin:26px 0 10px}.tool-card p{margin-bottom:0;color:var(--muted);font-size:.96rem}.tool-card-muted{box-shadow:none;opacity:.72}.tool-card-muted:hover{border-color:var(--border);transform:none}.tool-card-status{width:fit-content;border:1px solid var(--border);border-radius:999px;padding:3px 9px;color:var(--muted);font-size:.8rem}.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px;color:var(--muted);font-size:.92rem}.breadcrumb a{color:var(--brand)}.page-title{margin-bottom:28px}.tool-workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px}.editor-panel,.result-panel,.info-section article{border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.editor-panel{display:flex;min-height:560px;flex-direction:column;padding:16px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:14px}.panel-heading h2{margin:0}.button-row{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.button{min-height:38px;border:1px solid transparent;border-radius:8px;padding:8px 13px;cursor:pointer;font-weight:700}.button-primary{background:var(--brand);color:#fff}.button-primary:hover{background:var(--brand-dark)}.button-secondary{border-color:var(--border);background:var(--surface-muted);color:var(--text)}.button-secondary:hover{border-color:#b9c6d8;background:#e5ebf4}.code-field{width:100%;min-height:450px;flex:1;resize:vertical;border:1px solid var(--border);border-radius:8px;background:#fbfcfe;padding:14px;color:#111827;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:.92rem;line-height:1.55}.code-field:focus{border-color:var(--brand);outline:3px solid rgba(31,111,235,.14)}.action-status{min-height:24px;margin:8px 0 0;color:var(--brand);font-size:.92rem}.result-panel{margin-top:18px;padding:18px}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:24px}.stat-item{border:1px solid var(--border);border-radius:8px;background:#fbfcfe;padding:14px}.stat-item span{display:block;color:var(--muted);font-size:.9rem}.stat-item strong{display:block;margin-top:6px;font-size:1.8rem;line-height:1}.stat-error strong{color:var(--error-text)}.stat-warning strong{color:var(--warning-text)}.stat-fix strong{color:var(--fix-text)}.issues-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.issues-header h2{margin:0}.issues-list{display:grid;gap:10px}.empty-state{margin:0;border:1px dashed var(--border);border-radius:8px;padding:16px;color:var(--muted);text-align:center}.issue-item{border-left:4px solid var(--border);border-radius:8px;padding:14px}.issue-error{border-color:var(--error-border);background:var(--error-bg)}.issue-warning{border-color:var(--warning-border);background:var(--warning-bg)}.issue-fix{border-color:var(--fix-border);background:var(--fix-bg)}.issue-meta{display:flex;align-items:center;gap:10px;margin-bottom:8px;color:var(--muted);font-size:.9rem}.issue-badge{border-radius:999px;padding:2px 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