*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#2563EB;--primary-dark:#1d4ed8;
  --secondary:#14B8A6;--accent:#F59E0B;
  --text:#172033;--text-light:#64748B;
  --bg-light:#F6F9FC;--border:#E2E8F0;
  --radius:12px;--shadow:0 4px 6px -1px rgba(0,0,0,.1);
}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;color:var(--text);line-height:1.6}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
a{color:var(--primary);text-decoration:none}
img{max-width:100%;height:auto;display:block}

/* Header */
.header{position:fixed;top:0;left:0;right:0;background:#fff;z-index:100;transition:box-shadow .3s}
.header.scrolled{box-shadow:var(--shadow)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:bold;font-size:.9rem}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu a{color:var(--text);font-weight:500}
.nav-menu a:hover{color:var(--primary)}
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;padding:8px;background:none;border:none;cursor:pointer}
.mobile-menu-btn span{width:22px;height:2px;background:var(--text)}

/* Buttons */
.btn{display:inline-block;padding:12px 28px;border-radius:var(--radius);font-weight:600;text-align:center;transition:all .3s;cursor:pointer;border:none;font-size:1rem}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(37,99,235,.3)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px)}
.btn-secondary{background:#fff;color:var(--primary);border:2px solid var(--primary)}
.btn-secondary:hover{background:var(--primary);color:#fff}
.btn-sm{padding:8px 20px;font-size:.875rem}
.btn-block{width:100%}

/* Hero */
.hero{padding:120px 0 80px;background:linear-gradient(135deg,#f0f7ff,#e6f7ff)}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero h1{font-size:3rem;font-weight:800;line-height:1.2;margin-bottom:20px}
.hero h1 span{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.2rem;color:var(--text-light);margin-bottom:32px}
.hero-buttons{display:flex;gap:16px;margin-bottom:48px}
.hero-stats{display:flex;gap:48px}
.hero-stats div{text-align:center}
.hero-stats strong{display:block;font-size:2rem;color:var(--primary);font-weight:700}
.hero-stats span{color:var(--text-light);font-size:.9rem}
.hero-image img{width:100%;height:420px;object-fit:cover;border-radius:20px;box-shadow:0 20px 40px -10px rgba(37,99,235,.3)}

/* Sections */
.section{padding:80px 0}
.section-light{background:var(--bg-light)}
.section-title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:12px}
.section-subtitle{text-align:center;color:var(--text-light);margin-bottom:48px}

/* Courses */
.courses-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.course-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);transition:transform .3s}
.course-card:hover{transform:translateY(-6px)}
.course-image{height:150px;overflow:hidden}
.course-image img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.course-card:hover .course-image img{transform:scale(1.08)}
.course-body{padding:24px}
.course-body h3{font-size:1.15rem;margin-bottom:6px}
.course-grade{display:inline-block;padding:3px 12px;background:var(--bg-light);color:var(--primary);font-size:.78rem;font-weight:600;border-radius:999px;margin-bottom:10px}
.course-desc{color:var(--text-light);font-size:.88rem;margin-bottom:14px}
.course-body ul{list-style:none}
.course-body li{padding:5px 0;color:var(--text-light);font-size:.88rem}
.course-body li::before{content:"✓ ";color:var(--secondary);font-weight:bold}

/* Teachers */
.teachers-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.teacher-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);transition:transform .3s}
.teacher-card:hover{transform:translateY(-6px)}
.teacher-photo{height:240px;overflow:hidden}
.teacher-photo img{width:100%;height:100%;object-fit:cover;object-position:top;transition:transform .4s}
.teacher-card:hover .teacher-photo img{transform:scale(1.05)}
.teacher-body{padding:20px;text-align:center}
.teacher-body h4{font-size:1.1rem;margin-bottom:4px}
.teacher-subject{color:var(--primary);font-size:.85rem;margin-bottom:10px}
.teacher-body p:last-child{color:var(--text-light);font-size:.88rem}

/* Features */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature{text-align:center;padding:24px}
.feature-icon{font-size:2.5rem;margin-bottom:16px}
.feature h4{font-size:1.1rem;margin-bottom:8px}
.feature p{color:var(--text-light);font-size:.9rem}

/* Campus */
.campus-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:180px;gap:16px}
.campus-item{border-radius:14px;overflow:hidden}
.campus-item img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.campus-item:hover img{transform:scale(1.08)}
.campus-main{grid-column:span 2;grid-row:span 2}

/* Contact */
.contact-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;max-width:900px;margin:0 auto}
.contact-info h2{font-size:1.75rem;margin-bottom:12px}
.contact-info>p{color:var(--text-light);margin-bottom:24px}
.contact-details div{padding:8px 0;color:var(--text-light)}
.contact-details strong{color:var(--text)}
.contact-form{background:#fff;padding:32px;border-radius:var(--radius);box-shadow:var(--shadow)}
.form-group{margin-bottom:16px}
.form-group input,.form-group select{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:8px;font-size:1rem}
.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--primary)}
.form-tip{text-align:center;color:var(--text-light);font-size:.8rem;margin-top:12px}

/* Footer */
.footer{background:var(--text);color:#fff;padding:32px 0;text-align:center}
.footer p{opacity:.7;font-size:.9rem;margin-bottom:4px}

/* Responsive */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-image{order:-1}
  .hero-image img{height:320px}
  .courses-grid,.teachers-grid,.features-grid{grid-template-columns:repeat(2,1fr)}
  .campus-grid{grid-template-columns:repeat(2,1fr)}
  .contact-wrapper{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-menu{display:none}
  .mobile-menu-btn{display:flex}
  .hero{padding:100px 0 60px}
  .hero h1{font-size:2rem}
  .hero p{font-size:1rem}
  .hero-buttons{flex-direction:column}
  .hero-stats{flex-wrap:wrap;gap:24px}
  .hero-image img{height:240px}
  .courses-grid,.teachers-grid,.features-grid{grid-template-columns:1fr}
  .campus-grid{grid-template-columns:1fr;grid-auto-rows:200px}
  .campus-main{grid-column:span 1;grid-row:span 1}
  .section{padding:60px 0}
  .section-title{font-size:1.5rem}
}