*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#fff;color:#1b1f24}
.hdr{border-bottom:1px solid #e8ebef;padding:12px 18px;display:flex;justify-content:space-between;align-items:center}
.brand{font-weight:800;text-decoration:none;color:#1b1f24}.nav a{margin-left:12px;color:#5b6572;text-decoration:none;font-size:.85rem}
.layout{display:grid;gap:18px;max-width:1100px;margin:0 auto;padding:22px 18px 48px}
@media(min-width:900px){.layout{grid-template-columns:230px 1fr}}
.toc{background:#f7f8fa;border:1px solid #e8ebef;border-radius:10px;padding:14px;height:fit-content;font-size:.88rem}
.toc ol{margin:8px 0 0;padding-left:1.2em}.step{border-left:3px solid #2e75f0;padding:2px 0 2px 14px;margin:0 0 16px}
.btn{display:inline-block;background:#2e75f0;color:#fff!important;text-decoration:none;padding:10px 14px;border-radius:8px;font-weight:700}
footer{padding:20px 18px;border-top:1px solid #e8ebef;color:#5b6572;font-size:.85rem}