:root{
  --bg:#ffffff;
  --text:#1a1a1a;
  --muted:#555;
  --border:#e6e6e6;
  --accent:#0b57d0;
  --maxw: 1080px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 18px}

.top{
  border-bottom:1px solid var(--border);
  background:#fafafa;
}
.top .wrap{
  padding:18px 0;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.brand h1{margin:0; font-size:22px}
.brand p{margin:2px 0 0; color:var(--muted); font-size:14px}

.nav{display:flex; gap:10px; flex-wrap:wrap}
.nav a{padding:6px 10px; border-radius:8px}
.nav a.active{background:#eef3ff; font-weight:600; text-decoration:none}

.content{padding:20px 0 44px}
.muted{color:var(--muted)}

.footer{
  border-top:1px solid var(--border);
  background:#fafafa;
  padding:14px 0;
  color:var(--muted);
  font-size:13px;
}

.cards{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap:16px;
  margin-top:16px;
}
@media (max-width: 900px){
  .cards{grid-template-columns:1fr}
}
.card{
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
  background:#fff;
}
.thumb{
  width:100%;
  height:160px;
  border:1px dashed #bbb;
  border-radius:12px;
  background:#f7f7f7;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  margin-bottom:10px;
}
.card h3{margin:0 0 6px; font-size:16px}
.card p{margin:0; color:var(--muted)}