:root{--bg:#f8fbff;--fg:#0f2a36;--muted:#5b6b74;--mint:#56c2a3;--mint-deep:#2fa88a;--sky:#e6f2ff;--sand:#fff8ef;--card:#ffffff;--border:#e5eef4;--accent:#f3a762}
*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.6}
a{color:var(--mint-deep);text-decoration:none}.container{max-width:1120px;margin:0 auto;padding:20px}
.header{position:sticky;top:0;background:linear-gradient(90deg,#fff,var(--sky));border-bottom:1px solid var(--border);z-index:40}
.navbar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px}.brand{font-weight:900;font-size:18px;color:var(--fg)}
.menu{display:flex;gap:10px;flex-wrap:wrap}.menu a{padding:8px 12px;border-radius:12px;background:#fff;border:1px solid var(--border);font-size:13px;color:var(--fg)}
.hero{background:linear-gradient(180deg,var(--sand),#fff);border-radius:16px;padding:22px;border:1px solid var(--border);margin-top:12px}
.hero h1{margin:0 0 8px;font-size:28px;color:var(--fg)}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;margin-top:14px;box-shadow:0 10px 28px rgba(15,42,54,0.06)}
.section h2{font-size:22px;margin:0 0 10px;color:var(--fg)}.small{font-size:14px;color:var(--muted)}
.grid{display:grid;gap:14px}.grid-2{grid-template-columns:1fr 1fr}.grid-3{grid-template-columns:1fr 1fr 1fr}
@media(max-width:900px){.grid-2,.grid-3{grid-template-columns:1fr}.menu{display:none}}
label{display:block;font-weight:700;margin-bottom:6px}input,select,textarea,button{width:100%;padding:11px;border-radius:10px;border:1px solid var(--border);font-size:15px;background:#fff}
.btn{background:linear-gradient(90deg,var(--mint),var(--mint-deep));color:#fff;border:0;padding:12px 14px;border-radius:12px;font-weight:800;cursor:pointer}
.note{background:#fffaf7;border:1px solid #fde5d2;padding:10px;border-radius:8px;color:#9a5b2a;font-weight:700}.helper{font-size:13px;color:var(--muted);margin-top:8px}
.footer{margin-top:20px;border-top:1px solid var(--border);padding:16px 0;background:#fff}.small-muted{font-size:12px;color:#98a3ad}
.badge{display:inline-block;padding:4px 8px;border-radius:999px;border:1px solid var(--border);background:#eefcf8;color:#1a6b59;font-size:12px;font-weight:800}
blockquote{border-left:4px solid var(--mint);background:#f6fffb;padding:10px;border-radius:8px}hr.sep{border:0;border-top:1px dashed var(--border);margin:12px 0}
.kbd{font-family:ui-monospace,Consolas,monospace;background:#f3f7fb;border:1px solid #e5eef4;border-radius:6px;padding:2px 6px}