:root{--bg: #0d1117;--bg-alt: #121826;--card: #161e2e;--line: #24304a;--text: #e6edf6;--muted: #8b98ad;--brand: #4da3ff;--brand-2: #7ee0b0;--good: #3fce8e;--warn: #f0b34e;--low: #ef6b6b}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 Inter,Segoe UI,system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased}.wrap{max-width:1060px;margin:0 auto;padding:0 20px}h1,h2,h3{line-height:1.25;margin:0 0 .5em}h1{font-size:clamp(1.9rem,4.5vw,3rem);letter-spacing:-.02em}h2{font-size:1.5rem;margin-top:2.2em}h3{font-size:1.08rem;margin-top:1.6em}p{margin:.6em 0}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}em{font-style:normal}.site-header{border-bottom:1px solid var(--line);background:#0d1117e6;position:sticky;top:0;backdrop-filter:blur(8px);z-index:10}.nav-shell{display:flex;align-items:center;justify-content:space-between;height:60px}.logo{font-weight:800;font-size:1.15rem;color:var(--text);letter-spacing:-.02em}.logo:after{content:".";color:var(--brand)}.nav-links{display:flex;gap:22px;font-size:.95rem}.nav-links a{color:var(--muted)}.nav-links a:hover{color:var(--text);text-decoration:none}.site-footer{border-top:1px solid var(--line);margin-top:70px;padding:30px 0 40px;color:var(--muted);font-size:.9rem}.foot-links a{color:var(--muted)}.foot-note{color:#5b6779;font-size:.85rem}.hero{text-align:center;padding:64px 0 12px}.badge{display:inline-block;font-size:.85rem;color:var(--brand-2);border:1px solid var(--line);border-radius:999px;padding:5px 14px;background:var(--bg-alt);margin-bottom:18px}.hero .sub{color:var(--muted);font-size:1.08rem;max-width:640px;margin:14px auto 0}.section{padding:26px 0}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}.card h3{margin-top:0}.card p{color:var(--muted);font-size:.95rem;margin:0}@media(max-width:760px){.grid-3{grid-template-columns:1fr}}.tool{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin:34px auto 0;max-width:980px;text-align:left}.tool-note{text-align:center;color:var(--brand-2);font-size:.9rem;margin-bottom:14px}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media(max-width:760px){.tool-grid{grid-template-columns:1fr}}.field{display:flex;flex-direction:column;gap:6px}.field-label{font-weight:600;font-size:.95rem}.field textarea{background:var(--bg-alt);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:12px;font:13.5px/1.5 ui-monospace,Cascadia Mono,Consolas,monospace;resize:vertical;min-height:220px}.field textarea:focus{outline:2px solid var(--brand);border-color:transparent}.tool-actions{display:flex;gap:12px;align-items:center;margin-top:14px;flex-wrap:wrap}.btn{border-radius:10px;padding:11px 20px;font-weight:700;font-size:.98rem;cursor:pointer;border:1px solid transparent}.btn-primary{background:var(--brand);color:#06121f}.btn-primary:disabled{opacity:.45;cursor:not-allowed}.btn-ghost{background:transparent;color:var(--muted);border-color:var(--line)}.btn-ghost:hover{color:var(--text)}.result{margin-top:26px;border-top:1px solid var(--line);padding-top:20px}.result-head{display:flex;gap:22px;align-items:center;flex-wrap:wrap}.score{display:flex;flex-direction:column;align-items:center;justify-content:center;width:128px;height:128px;border-radius:50%;border:4px solid var(--line);flex:none}.score-good{border-color:var(--good)}.score-mid{border-color:var(--warn)}.score-low{border-color:var(--low)}.score-num{font-size:2.6rem;font-weight:800;line-height:1}.score-label{font-size:.85rem;color:var(--muted)}.result-meta{color:var(--muted);font-size:.95rem}.result-meta .ok{color:var(--good)}.result-meta .warn{color:var(--warn)}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 4px}.chip{border-radius:999px;padding:4px 13px;font-size:.9rem;border:1px solid var(--line);background:var(--bg-alt)}.chip em{color:var(--muted);font-size:.8em;margin-left:3px}.chip-missing{border-color:color-mix(in srgb,var(--warn) 55%,transparent);color:#ffd9a0}.chip-ok{color:#a9e6c9}.chip-phrase{font-weight:600}.tips{color:var(--muted);padding-left:20px}.tips li{margin:6px 0}.result-foot{color:#5b6779;font-size:.88rem;border-top:1px dashed var(--line);padding-top:12px;margin-top:18px}.rewrite{margin-top:26px;border-top:1px solid var(--line);padding-top:20px}.rewrite-head{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.rewrite-note{color:var(--muted);font-size:.85rem;flex:1;min-width:260px}.rewrite-error{font-size:.95rem}.rewrite-result{margin-top:22px}.rewrite-text{width:100%;background:var(--bg-alt);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:14px;font:13.5px/1.55 ui-monospace,Cascadia Mono,Consolas,monospace;resize:vertical}.ba-score{display:flex;align-items:baseline;gap:10px;margin-bottom:14px;flex-wrap:wrap}.ba-num{font-size:2rem;font-weight:800;color:var(--warn)}.ba-after{color:var(--good)}.ba-arrow{font-size:1.4rem;color:var(--muted)}.ba-label{color:var(--muted);font-size:.85rem}.print-only{display:none}@media print{body *{visibility:hidden!important}.print-only,.print-only *{visibility:visible!important}.print-only{display:block!important;position:absolute;left:0;top:0;width:100%;background:#fff}.print-only pre{white-space:pre-wrap;font:12pt/1.5 Georgia,Times New Roman,serif;color:#000;padding:24px}}.warn{color:var(--warn)}.prose{max-width:780px;margin:50px auto 0}.prose h1{font-size:clamp(1.7rem,4vw,2.4rem)}.prose .lead{color:var(--muted);font-size:1.05rem}.faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:10px 0}.faq summary{font-weight:600;cursor:pointer}.faq p{color:var(--muted);margin:10px 0 4px}