:root{--bg:#f7f8fb;--ink:#172033;--muted:#667085;--card:#fff;--line:#e5e7eb;--brand:#2764e7;--soft:#eef4ff;--warn:#fff7e6;--warn-line:#f2c66d;--ok:#e8f7ee;--ok-line:#83c99c}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.shell{max-width:1080px;margin:auto;padding:0 20px}.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.nav{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:18px}.logo{font-weight:800;color:var(--ink);letter-spacing:.2px}.links{display:flex;gap:16px;flex-wrap:wrap;font-size:14px}.hero{padding:54px 0 30px;background:linear-gradient(135deg,#f0f5ff,#fff)}.eyebrow{font-size:13px;color:var(--brand);font-weight:700;text-transform:uppercase;letter-spacing:.08em}.hero h1{font-size:clamp(32px,5vw,52px);line-height:1.12;margin:12px 0}.hero p{max-width:720px;color:var(--muted);font-size:18px}.meta{font-size:13px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:28px 0}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 5px 18px rgba(25,50,100,.04)}.card h2,.card h3{margin-top:0;line-height:1.25}.button{display:inline-block;background:var(--brand);color:#fff;border-radius:10px;padding:10px 14px;font-weight:700;margin-top:8px}.button:hover{text-decoration:none;filter:brightness(.95)}.section{padding:30px 0}.notice{background:var(--warn);border:1px solid var(--warn-line);padding:14px 16px;border-radius:12px;margin:18px 0}.success{background:var(--ok);border:1px solid var(--ok-line);padding:14px 16px;border-radius:12px;margin:18px 0}.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px}.codes{border-collapse:collapse;width:100%;min-width:680px}.codes th,.codes td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.codes th{background:#fafbff;font-size:13px;color:var(--muted)}.codes tr:last-child td{border-bottom:0}.code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:700;white-space:nowrap}.tag{display:inline-block;border-radius:999px;padding:2px 9px;font-size:12px;font-weight:700}.tag.verify{background:#fff1cc;color:#8a5b00}.tag.exp{background:#f1f2f4;color:#596273}.tag.xp{background:#e9f2ff;color:#2058bb}.two{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}.steps li{margin:9px 0}.footer{color:var(--muted);font-size:13px;padding:34px 0 52px;border-top:1px solid var(--line);margin-top:30px}.small{font-size:14px;color:var(--muted)}@media(max-width:640px){.nav{align-items:flex-start;flex-direction:column;padding:14px 0}.hero{padding-top:34px}.links{gap:10px}.card{padding:18px}}