body{margin:0;font-family:Kanit,sans-serif;background:#f4faff}
.container{max-width:1100px;margin:auto;padding:0 20px}
.center{text-align:center}
header{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.1);position:sticky;top:0}
.header-content{display:flex;justify-content:space-between;align-items:center;height:70px}
.logo{font-size:24px;font-weight:700;color:#007bff}
.btn{padding:12px 30px;border-radius:40px;text-decoration:none;display:inline-block}
.primary{background:linear-gradient(135deg,#007bff,#00c6ff);color:#fff}
.big{font-size:20px}
.hero{text-align:center;padding:80px 20px;background:#fff}
.section{padding:60px 0}
footer{text-align:center;padding:30px;background:#0a2540;color:#fff}

/* ปุ่มเด้ง */
.pulse{animation:pulse 1.5s infinite}
@keyframes pulse{
  0%{transform:scale(1)}
  50%{transform:scale(1.08)}
  100%{transform:scale(1)}
}

/* สไลด์ */
.slider{overflow:hidden;border-radius:20px;box-shadow:0 5px 15px rgba(0,0,0,.15)}
.slides{display:flex;transition:0.8s ease}
.slides img{width:100%;flex-shrink:0;display:block}