:root{--bg:#f7f8fb;--card:#fff;--text:#162033;--muted:#617083;--line:#e4e8ef;--accent:#6c4df6;--accent2:#4b2ccc}
*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.65}
a{text-decoration:none;color:inherit}.container{width:min(1160px,92%);margin:auto}
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}.nav{min-height:68px;display:flex;justify-content:space-between;align-items:center;gap:18px}.brand{font-weight:850;font-size:1.35rem;letter-spacing:-.04em}.brand span{color:var(--accent)}
nav{display:flex;gap:20px}nav a{color:var(--muted);font-size:.94rem}
.hero{padding:76px 0 52px;text-align:center}.hero h1{font-size:clamp(2.4rem,6vw,4.8rem);line-height:1.02;letter-spacing:-.06em;max-width:980px;margin:0 auto 20px}.hero p{max-width:760px;color:var(--muted);font-size:1.08rem;margin:0 auto 28px}
.search{max-width:680px;margin:auto;display:flex;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px}.search input{flex:1;padding:12px;border:0;outline:0;font:inherit}.btn,.search button{background:var(--accent);color:#fff;border:0;border-radius:10px;padding:12px 17px;font-weight:750;cursor:pointer}
.section{padding:38px 0}.section h2{font-size:1.9rem;letter-spacing:-.035em;margin:0 0 7px}.lead{color:var(--muted);margin:0 0 24px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;transition:.18s}.card:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(28,36,70,.07)}.card h3{margin:0 0 7px}.card p{margin:0;color:var(--muted);font-size:.93rem}.badge{display:inline-block;background:#f0edff;color:var(--accent2);font-weight:800;font-size:.73rem;border-radius:999px;padding:5px 9px;margin-bottom:12px}
.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:30px;padding:42px 0}.tool h1{font-size:2.5rem;letter-spacing:-.05em;line-height:1.1;margin:0 0 10px}.intro{color:var(--muted);font-size:1.05rem}
.panel,.article,.side{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;margin-bottom:20px}.upload{border:2px dashed #cdd4df;border-radius:14px;padding:28px;text-align:center}.upload input{max-width:100%}
.controls{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:18px}.field label{display:block;font-weight:700;font-size:.88rem;margin-bottom:5px}.field input,.field select{width:100%;padding:11px;border:1px solid #ccd4e0;border-radius:9px;font:inherit}
.preview{margin-top:20px;text-align:center}.preview canvas,.preview img{max-width:100%;max-height:520px;border-radius:10px;background:#f0f2f6}.status{margin:14px 0;color:var(--muted);font-size:.9rem}
.article p,.article li{color:#455165}.article h2{margin-top:0}.article h3{margin-top:25px}.sidebar{position:sticky;top:90px;align-self:start}.side a{display:block;padding:8px 0;border-bottom:1px solid #eef1f5;color:var(--muted);font-size:.92rem}.side a:last-child{border:0}
.ad{border:1px dashed #c9d0dc;border-radius:12px;min-height:100px;display:flex;justify-content:center;align-items:center;color:#8b96a5;background:#fafbfd;margin:26px 0;font-size:.84rem}
.page{padding:46px 0}.page h1{font-size:2.6rem;letter-spacing:-.045em}.prose{max-width:860px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px}.prose p,.prose li{color:#455165}.prose h2{margin-top:30px}
footer{margin-top:55px;background:#111827;color:#d8dfeb;padding:44px 0}.foot{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}.foot p,.foot a{color:#9ba7b8;font-size:.92rem}.foot a{display:block;padding:4px 0}.copyright{border-top:1px solid #283348;margin-top:28px;padding-top:18px;color:#8490a2;font-size:.85rem}
@media(max-width:850px){.grid{grid-template-columns:repeat(2,1fr)}.tool-layout{grid-template-columns:1fr}.sidebar{position:static}.foot{grid-template-columns:1fr 1fr}nav .hide{display:none}}
@media(max-width:560px){.grid,.controls{grid-template-columns:1fr}.hero h1{font-size:2.7rem}.tool h1,.page h1{font-size:2rem}.foot{grid-template-columns:1fr}}