:root{
  --bg:#f6f2e9;--paper:#fffdf8;--ink:#1f2933;--muted:#66717c;--line:#ddd6c8;
  --accent:#b45309;--accent2:#7c2d12;--soft:#efe8dc;--shadow:0 14px 38px rgba(43,35,24,.08);
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
a{color:inherit;text-decoration:none} button,input,textarea,select{font:inherit}
.wrap{width:min(1120px,calc(100% - 36px));margin:auto}.mast{background:#20262d;color:#f8f4ea}.mast .wrap{min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:13px}.mast small{opacity:.78}
.header{position:sticky;top:0;z-index:20;background:rgba(246,242,233,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(132,118,94,.18)}.header .wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:.02em}.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--ink);color:#fff7ed;font-family:Georgia,serif}.nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.nav a{padding:9px 12px;border-radius:10px;color:#46515b}.nav a:hover,.nav a.active{background:#e8dfd0;color:#7c2d12}
.hero{padding:82px 0 64px}.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:42px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border:1px solid #d5c7b1;border-radius:999px;background:#fffaf0;color:#8a4b10;font-size:13px;font-weight:700;letter-spacing:.06em}.hero h1{font:800 clamp(42px,7vw,76px)/1.03 Georgia,"Noto Serif SC",serif;margin:18px 0 20px;letter-spacing:-.03em}.hero p{max-width:720px;color:var(--muted);font-size:18px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{border:0;border-radius:12px;padding:12px 18px;background:var(--ink);color:white;font-weight:700;cursor:pointer}.btn.alt{background:transparent;color:var(--ink);border:1px solid #bfb4a4}.hero-card{background:linear-gradient(160deg,#fffdf8,#eee5d7);border:1px solid #d9cfbf;border-radius:28px;padding:28px;box-shadow:var(--shadow)}.hero-card .stamp{font:700 12px/1.2 ui-monospace,SFMono-Regular,Menlo,monospace;color:#9a5a1d;letter-spacing:.12em}.hero-card h2{font-size:28px;margin:10px 0}.hero-card dl{display:grid;grid-template-columns:100px 1fr;gap:10px 16px;margin:22px 0 0}.hero-card dt{color:#7a746d}.hero-card dd{margin:0;font-weight:650}
section{padding:58px 0}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:22px}.section-head h2{margin:0;font:800 34px/1.15 Georgia,"Noto Serif SC",serif}.section-head p{margin:0;max-width:650px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{display:block;background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 8px 24px rgba(45,37,25,.04);transition:.2s ease}.card:hover{transform:translateY(-3px);border-color:#c5b79f;box-shadow:var(--shadow)}.card .kicker{font:700 12px/1 ui-monospace,SFMono-Regular,Menlo,monospace;color:#a3540c;text-transform:uppercase;letter-spacing:.1em}.card h3{font-size:21px;margin:12px 0 8px}.card p{color:var(--muted);margin:0}.card .go{display:inline-block;margin-top:18px;font-weight:700;color:#8d3f09}
.band{background:#20262d;color:#f4efe5}.band .section-head p{color:#c6c8c9}.mini-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.mini{border:1px solid #3e4650;border-radius:16px;padding:18px;background:#262d35}.mini b{display:block;margin-bottom:4px}.mini span{color:#bbc0c4;font-size:14px}
.article{max-width:860px}.article h1{font:800 46px/1.12 Georgia,"Noto Serif SC",serif;margin:22px 0 14px}.article h2{margin-top:34px}.article p,.article li{color:#4e5962}.crumb{font-size:14px;color:#7c6f60}.crumb a{text-decoration:underline;text-underline-offset:3px}.note{border-left:4px solid var(--accent);background:#fff9ed;padding:16px 18px;border-radius:0 12px 12px 0;margin:24px 0}
.tool-shell{display:grid;grid-template-columns:260px 1fr;gap:22px;align-items:start}.tool-nav{position:sticky;top:96px;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:12px}.tool-nav a{display:block;padding:10px 12px;border-radius:9px;color:#4c5760}.tool-nav a:hover,.tool-nav a.current{background:#eee4d4;color:#7c2d12;font-weight:700}.panel{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:24px}.panel h2{margin-top:0}.field{margin:14px 0}.field label{display:block;font-weight:700;margin-bottom:7px}.control,textarea{width:100%;border:1px solid #cfc5b5;border-radius:10px;background:#fffefa;padding:12px 13px;outline:none}.control:focus,textarea:focus{border-color:#a65d1e;box-shadow:0 0 0 3px rgba(180,83,9,.1)}textarea{min-height:180px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.tool-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.result{margin-top:18px;padding:14px;border:1px dashed #c6b79f;background:#fbf6ec;border-radius:12px;white-space:pre-wrap;overflow:auto}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}.stat{padding:14px;background:#f4ede2;border-radius:12px}.stat b{display:block;font-size:22px}.stat span{font-size:13px;color:#6b7280}
.footer{padding:42px 0 28px;border-top:1px solid var(--line);margin-top:48px}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:24px}.footer h4{margin:0 0 10px}.footer p,.footer a{color:#66717c}.copyright{margin-top:24px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:#7c746a}
@media(max-width:850px){.header{position:static}.header .wrap{height:auto;padding:16px 0;align-items:flex-start;flex-direction:column}.hero-grid,.tool-shell{grid-template-columns:1fr}.hero{padding:52px 0}.grid{grid-template-columns:1fr}.mini-grid{grid-template-columns:1fr 1fr}.tool-nav{position:static}.footer-grid{grid-template-columns:1fr}.hero-card{order:-1}.section-head{display:block}.section-head p{margin-top:8px}.stats{grid-template-columns:1fr}}
@media(max-width:520px){.mini-grid{grid-template-columns:1fr}.mast .wrap{align-items:flex-start;flex-direction:column;padding:10px 0}.nav{gap:2px}.nav a{padding:7px 8px}.hero h1{font-size:44px}}