:root{--bg:#070b12;--panel:#0e1521;--panel2:#111a28;--border:#263247;--text:#f7f9fc;--muted:#9aa9bd;--green:#35d07f;--red:#ff6b7d;--blue:#7c8cff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}.layout{display:grid;grid-template-columns:280px 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:#080d15;border-right:1px solid var(--border);padding:24px 18px}.brand{font-weight:800;font-size:20px}.brand small{display:block;color:var(--muted);font-size:12px;font-weight:500;margin-top:4px}.nav{margin-top:26px}.nav a{display:block;color:var(--muted);text-decoration:none;padding:11px 12px;border-radius:10px;margin:4px 0}.nav a:hover{background:#111a28;color:#fff}.main{max-width:1180px;padding:40px 44px 80px}.kicker{color:var(--green);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}h1{font-size:40px;line-height:1.08;margin:10px 0 12px}h2{font-size:26px;margin:8px 0}.lead,.section>p,.step p{color:var(--muted);line-height:1.65}.section{margin-top:42px}.rule,.warn,.note{padding:15px 17px;border-radius:13px;margin:18px 0}.rule{background:#211219;border:1px solid #6c2833;color:#ffdce1}.warn{background:#261f0e;border:1px solid #755f22;color:#ffe6a0}.note{background:#0d1c15;border:1px solid #1d6844;color:#c9f7dd}.video{border:1px dashed #40516d;border-radius:16px;padding:22px;color:var(--muted);background:#0b111c;margin:20px 0}.step{background:var(--panel);border:1px solid var(--border);border-radius:18px;overflow:hidden;margin-top:22px}.step-head{padding:20px 22px;font-weight:800;font-size:19px}.step-no{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;background:#1b2850;color:#dce3ff;border-radius:9px;margin-right:10px}.step-body{padding:0 22px 22px}.screenshot{width:100%;display:block;border:1px solid var(--border);border-radius:12px;margin-top:14px;background:#05080d}.checklist{display:grid;gap:10px}.check{background:var(--panel2);border:1px solid var(--border);border-radius:10px;padding:12px 14px;color:#dbe6f2}code{background:#0a111b;border:1px solid var(--border);border-radius:6px;padding:2px 6px;color:#dbe7ff}footer{margin-top:60px;color:#6f819b;font-size:12px}@media(max-width:900px){.layout{grid-template-columns:1fr}.sidebar{position:relative;height:auto;border-right:0;border-bottom:1px solid var(--border)}.main{padding:26px 18px 60px}h1{font-size:32px}}