:root{
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --primary:#0d6efd;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Arial, Helvetica, sans-serif}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.site-header{border-bottom:1px solid #eee;background:#fff;position:sticky;top:0;z-index:1000}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{font-weight:700;font-size:1.25rem;text-decoration:none;color:#333}
.main-nav a{margin:0 8px;text-decoration:none;color:#333}
.hero{height:420px;background:url('assets/images/placeholder.jpg') center/cover no-repeat;display:flex;align-items:center}
.hero-inner{color:#fff;background:rgba(0,0,0,.4);padding:40px;border-radius:8px}
.section{padding:60px 0}
.bg-light{background:#f7f7f7}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.card{border:1px solid #e5e7eb;border-radius:8px;padding:12px;text-align:center;background:#fff}
.portfolio-item{margin:0}
.news-list{list-style:none;padding:0;margin:0}
.btn-primary{display:inline-block;padding:12px 20px;background:var(--primary);color:#fff;border-radius:6px;text-decoration:none}
@media (max-width: 900px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 600px){
  .main-nav{display:none}
  .hero{height:320px}
  .grid-3,.grid-4{grid-template-columns:1fr}
}