:root{
  --bg:#f4f6fb; --bg2:#ffffff; --card:#ffffff; --border:#dde1f0;
  --accent:#3a5bd9; --accent2:#b8790a; --text:#1d2233; --muted:#5a5f7a;
  --code:#eef1f8; --green:#1f9a53; --red:#c8422f;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.68}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
header.top{position:sticky;top:0;z-index:50;background:linear-gradient(180deg,#ffffff,rgba(244,246,251,.94));border-bottom:1px solid var(--border);backdrop-filter:blur(6px)}
.topwrap{max-width:1200px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.15rem;color:var(--accent2);white-space:nowrap}
.brand small{display:block;font-weight:400;font-size:.72rem;color:var(--muted)}
.langbar{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
.langbar a{background:var(--card);border:1px solid var(--border);color:var(--text);padding:6px 12px;border-radius:20px;cursor:pointer;font-size:.85rem;font-weight:700}
.langbar a.active{background:var(--accent);color:#ffffff;border-color:var(--accent)}
.langbar a:hover{text-decoration:none}
.backhome{display:block;padding:8px 20px 0;max-width:1200px;margin:0 auto;font-size:.85rem;color:var(--muted)}
.layout{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:280px 1fr;gap:28px;padding:18px 20px 80px}
@media (max-width:880px){.layout{grid-template-columns:1fr}}
nav.toc{position:sticky;top:74px;align-self:start;max-height:calc(100vh - 100px);overflow-y:auto;background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:14px;box-shadow:0 1px 3px rgba(30,40,80,.06)}
@media (max-width:880px){nav.toc{position:static;max-height:none}}
nav.toc h4{margin:14px 0 6px;color:var(--accent2);font-size:.72rem;text-transform:uppercase;letter-spacing:.06em}
nav.toc h4:first-child{margin-top:0}
nav.toc a{display:block;padding:6px 10px;border-radius:8px;color:var(--muted);font-size:.9rem}
nav.toc a:hover{background:var(--card);color:var(--text);text-decoration:none}
main{min-width:0}
section.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:26px 28px;margin-bottom:22px;scroll-margin-top:80px;box-shadow:0 1px 3px rgba(30,40,80,.06)}
section.card h2{margin-top:0;color:var(--accent2);font-size:1.4rem}
section.card h3{color:var(--accent);font-size:1.08rem;margin:18px 0 8px}
section.card p{color:var(--text);margin:8px 0}
section.card ul,section.card ol{padding-left:22px;margin:8px 0}
section.card li{margin:5px 0}
.badge{display:inline-block;background:rgba(124,157,255,.15);color:var(--accent);border:1px solid rgba(124,157,255,.4);border-radius:6px;padding:1px 8px;font-size:.72rem;font-weight:700;margin-right:6px;vertical-align:middle}
.note{background:rgba(255,207,107,.08);border:1px solid rgba(255,207,107,.35);border-radius:10px;padding:10px 14px;margin:12px 0;font-size:.92rem}
.step{border-left:3px solid var(--accent);padding:2px 0 2px 16px;margin:10px 0}
code,.kbd{background:var(--code);border:1px solid var(--border);border-radius:5px;padding:1px 6px;font-size:.85em;color:#2a3aa0}
.hero{background:linear-gradient(135deg,#eef1fc,#e3e8fb);border:1px solid var(--border);border-radius:16px;padding:34px 30px;margin-bottom:22px}
.hero h1{margin:0 0 8px;font-size:1.8rem;color:var(--text)}
.hero p{color:var(--muted);max-width:760px}
.flow{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0}
.flow .step-chip{background:var(--bg2);border:1px solid var(--border);border-radius:20px;padding:6px 14px;font-size:.85rem;font-weight:600}
.flow .arrow{color:var(--muted)}
footer.site{text-align:center;color:var(--muted);font-size:.8rem;padding:20px}