:root{--brand:#2f54eb;--ink:#16181d;--muted:#6b7280;--line:#e8eaef}*{box-sizing:border-box}body{color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}.app-shell{flex-direction:column;min-height:100vh;display:flex}.app-header{border-bottom:1px solid var(--line);align-items:center;gap:32px;padding:16px 48px;display:flex}.brand{color:var(--brand);font-size:18px;font-weight:700}.app-header nav{gap:24px;margin-right:auto;display:flex}.app-header nav a,.app-footer{color:var(--muted);text-decoration:none}.cta{background:var(--brand);border-radius:6px;padding:9px 20px;font-weight:500;text-decoration:none;color:#fff!important}.cta.ghost{border:1px solid var(--brand);background:0 0;color:var(--brand)!important}.hero{text-align:center;flex:1;padding:96px 24px}.hero h1{letter-spacing:-1px;margin:0 0 16px;font-size:56px}.hero p{color:var(--muted);margin:0 0 32px;font-size:18px}.hero-actions{justify-content:center;gap:16px;display:flex}.health{margin-top:40px!important;font-size:14px!important}.health .ok{color:#3f8600}.health .warn{color:#cf1322}.muted{color:var(--muted)}.features{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;padding:0 48px 96px;display:grid}.features article{border:1px solid var(--line);border-radius:12px;padding:28px}.features h3{margin:0 0 8px}.features p{color:var(--muted);margin:0}.auth{border:1px solid var(--line);border-radius:12px;max-width:380px;margin:80px auto;padding:32px}.auth label{margin-bottom:16px;font-size:14px;display:block}.auth input{border:1px solid var(--line);border-radius:6px;width:100%;margin-top:6px;padding:10px 12px;font-size:15px}.auth button{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:6px;width:100%;padding:11px;font-size:15px}.error{color:#cf1322;background:#fff1f0;border-radius:6px;padding:10px 12px;font-size:14px}.app-footer{border-top:1px solid var(--line);padding:24px 48px;font-size:14px}