:root{--bg:#f4f7fb;--card:#fff;--ink:#0b1633;--muted:#61708c;--blue:#0f6fff;--blue2:#e7f0ff;--line:#dbe4f0;--green:#0b9b6b;--red:#d64545;--shadow:0 18px 40px rgba(13,35,76,.10);--radius:24px}
*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#eef5ff 0%,#f7f8fb 34%,#f4f7fb 100%);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select{font:inherit}button{border:0;border-radius:16px;padding:12px 18px;background:#eef3fb;color:var(--ink);font-weight:800;cursor:pointer}button.primary,.primary{background:var(--blue);color:white}button.secondary,.secondary{background:var(--blue2);color:#0949a8}.ghost{background:transparent;border:1px solid var(--line)}input,select{width:100%;border:1px solid var(--line);border-radius:16px;padding:13px 14px;background:#fff;color:var(--ink)}label{font-size:13px;color:var(--muted);font-weight:800;display:grid;gap:8px}.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:14px 20px;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,228,240,.8)}.brand{display:flex;gap:12px;align-items:center}.brand span{display:block;font-size:12px;color:var(--muted)}.logo{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,#0f6fff,#38d39f);color:white;display:grid;place-items:center;font-weight:900}main{max-width:1080px;margin:0 auto;padding:22px 16px 60px}.hero{padding:34px 4px 24px}.pill{display:inline-block;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--blue);font-weight:900;font-size:13px}.hero h1{font-size:clamp(34px,8vw,70px);line-height:.98;margin:18px 0 12px;letter-spacing:-2px}.hero p{max-width:760px;font-size:18px;line-height:1.65;color:var(--muted)}.hero-actions,.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.panel,.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin:18px 0}.section-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.section-head h2,.panel h2,.tool h3{margin:0 0 8px}.section-head p,.tool p,.panel p{margin:0 0 16px;color:var(--muted);line-height:1.55}.grid{display:grid;gap:12px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:1fr 1fr auto}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}.context-card{border:1px solid var(--line);border-radius:20px;padding:16px;background:linear-gradient(180deg,#fff,#f8fbff)}.context-card b{display:block;font-size:18px;margin-bottom:8px}.context-card span{color:var(--muted);font-size:14px;line-height:1.45}.context-card button{margin-top:12px;width:100%}.tools{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.tool{margin:0}pre{white-space:pre-wrap;word-break:break-word;background:#07142e;color:#d9e8ff;border-radius:18px;min-height:90px;padding:14px;overflow:auto;font-size:13px;line-height:1.45}.muted{color:var(--muted);font-size:13px}.canvas-wrap{margin-top:12px;border:1px dashed var(--line);border-radius:18px;padding:10px;background:#f8fbff;overflow:auto}canvas{max-width:100%;touch-action:none;border-radius:12px;background:white}footer{text-align:center;color:var(--muted);font-size:13px;padding:30px 14px 60px}@media(max-width:760px){.topbar{padding:12px}.hero h1{letter-spacing:-1px}.grid.two,.grid.three,.tools{grid-template-columns:1fr}.section-head{display:block}.hero-actions button,.row button{flex:1}.panel,.tool{padding:18px;border-radius:20px}pre{font-size:12px}}