:root{--bg:#f3f5f7;--surface:#fff;--surface-2:#f9fafb;--text:#1b2430;--muted:#6b7280;--line:#d9dee4;--primary:#0f766e;--danger:#b42318}*{box-sizing:border-box}body{background:radial-gradient(circle at top, #e6f5f2, var(--bg) 50%);color:var(--text);margin:0;font-family:IBM Plex Sans,Noto Sans TC,sans-serif}a{color:inherit}.shell{max-width:1120px;margin:0 auto;padding:1rem}.topbar{border:1px solid var(--line);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffd9;border-radius:.9rem;justify-content:space-between;align-items:center;margin-bottom:1.25rem;padding:.75rem 1rem;display:flex}.topbar nav{gap:.75rem;display:flex}.topbar nav a{border-radius:.5rem;padding:.35rem .55rem;font-size:.95rem;text-decoration:none}.topbar nav a:hover{background:var(--surface-2)}.brand{font-weight:650;text-decoration:none}h1,h2,h3,h4,p{margin-top:0}.grid{grid-template-columns:repeat(12,minmax(0,1fr));gap:1rem;display:grid}@media (width<=960px){.grid{grid-template-columns:repeat(1,minmax(0,1fr))}.topbar{flex-direction:column;align-items:flex-start;gap:.75rem}}