.ch-container{max-width:1280px;margin:0 auto;padding:0 24px}
.ch-header{position:sticky;top:0;z-index:1000;background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
.ch-header-top{background:#0f172a;color:#94a3b8;font-size:13px;padding:6px 0;border-bottom:1px solid rgba(255,255,255,0.06)}
.ch-header-top .ch-container{display:flex;justify-content:space-between;align-items:center}
.ch-header-top-left{display:flex;align-items:center;gap:20px}
.ch-header-contact{display:flex;align-items:center;gap:6px}
.ch-header-contact svg{color:#64748b;flex-shrink:0}
.ch-header-contact a{color:#94a3b8;text-decoration:none;transition:color 0.2s}
.ch-header-contact a:hover{color:#e2e8f0}
.ch-header-top-right{font-size:12px;letter-spacing:0.3px;color:#64748b}

.ch-header-main{padding:0;border-bottom:1px solid #e2e8f0;transition:box-shadow 0.3s}
.ch-header-main.ch-header-scrolled{box-shadow:0 1px 12px rgba(0,0,0,0.06)}
.ch-header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}

.ch-header-logo{display:flex;align-items:center;text-decoration:none;flex-shrink:0}
.ch-logo-img{height:40px;width:auto;max-width:180px;object-fit:contain}
.ch-logo-text{font-size:22px;font-weight:700;color:#0f172a;letter-spacing:1.5px}

.ch-header-nav{display:flex;align-items:center}
.ch-nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.ch-nav-list li{position:relative}
.ch-nav-link{display:flex;align-items:center;gap:4px;padding:8px 16px;font-size:14px;font-weight:500;color:#334155;text-decoration:none;transition:color 0.2s;border-radius:4px}
.ch-nav-link:hover{color:#0f172a;background:#f1f5f9}
.ch-nav-list li.active>.ch-nav-link{color:#0f172a;font-weight:600}
.ch-dropdown-icon{display:flex;align-items:center;color:#94a3b8;transition:transform 0.2s}

.ch-sub-menu{position:absolute;top:100%;left:0;min-width:200px;background:#fff;border:1px solid #e2e8f0;border-radius:6px;box-shadow:0 8px 24px rgba(0,0,0,0.08);padding:8px 0;list-style:none;margin:0;opacity:0;visibility:hidden;transform:translateY(8px);transition:all 0.2s;z-index:100}
.ch-nav-list li:hover>.ch-sub-menu{opacity:1;visibility:visible;transform:translateY(0)}
.ch-sub-menu li{margin:0}
.ch-sub-menu .ch-nav-link{padding:8px 20px;font-size:13px;font-weight:400;border-radius:0}
.ch-sub-menu .ch-nav-link:hover{background:#f8fafc;color:#0f172a}

.ch-header-actions{display:flex;align-items:center;gap:12px}
.ch-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 24px;font-size:14px;font-weight:600;border-radius:4px;text-decoration:none;transition:all 0.2s;border:none;cursor:pointer}
.ch-btn-primary{background:#0f172a;color:#fff}
.ch-btn-primary:hover{background:#1e293b}
.ch-btn-sm{padding:8px 20px;font-size:13px}
.ch-btn svg{flex-shrink:0}

.ch-mobile-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;color:#334155}
.ch-toggle-close{display:none}
.ch-mobile-toggle.ch-active .ch-toggle-open{display:none}
.ch-mobile-toggle.ch-active .ch-toggle-close{display:flex}

.ch-back-to-top{position:fixed;bottom:32px;right:32px;width:44px;height:44px;border-radius:50%;background:#0f172a;color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(12px);transition:all 0.3s;z-index:999;box-shadow:0 2px 8px rgba(0,0,0,0.15)}
.ch-back-to-top.ch-visible{opacity:1;visibility:visible;transform:translateY(0)}
.ch-back-to-top:hover{background:#1e293b;transform:translateY(-2px)}

.ch-footer{background:#0f172a;color:#94a3b8;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
.ch-footer-main{padding:64px 0 48px}
.ch-footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px}
.ch-footer-logo{margin-bottom:20px}
.ch-footer-logo a{text-decoration:none}
.ch-footer-logo-text{font-size:24px;font-weight:700;color:#fff;letter-spacing:2px}
.ch-footer-desc{font-size:14px;line-height:1.7;color:#64748b;margin:0;max-width:320px}
.ch-footer-heading{font-size:14px;font-weight:600;color:#e2e8f0;margin:0 0 20px;text-transform:uppercase;letter-spacing:0.8px}
.ch-footer-menu{list-style:none;margin:0;padding:0}
.ch-footer-menu li{margin-bottom:10px}
.ch-footer-menu a{color:#94a3b8;text-decoration:none;font-size:14px;transition:color 0.2s}
.ch-footer-menu a:hover{color:#fff}
.ch-footer-contact-list{list-style:none;margin:0;padding:0}
.ch-footer-contact-list li{display:flex;align-items:flex-start;gap:10px;margin-bottom:14px;font-size:14px}
.ch-footer-contact-list svg{flex-shrink:0;margin-top:2px;color:#64748b}
.ch-footer-contact-list a{color:#94a3b8;text-decoration:none;transition:color 0.2s}
.ch-footer-contact-list a:hover{color:#fff}
.ch-footer-contact-list span{color:#94a3b8}

.ch-footer-bottom{border-top:1px solid rgba(255,255,255,0.06);padding:20px 0}
.ch-footer-bottom-inner{display:flex;justify-content:space-between;align-items:center}
.ch-footer-copyright{font-size:13px;color:#475569;margin:0}

@media(max-width:992px){
	.ch-header-top{display:none}
	.ch-header-nav{position:fixed;top:0;right:-100%;width:300px;height:100vh;background:#fff;z-index:1001;padding:80px 24px 24px;transition:right 0.3s;box-shadow:-4px 0 20px rgba(0,0,0,0.1);overflow-y:auto}
	.ch-header-nav.ch-nav-open{right:0}
	.ch-nav-list{flex-direction:column;align-items:stretch;gap:0}
	.ch-nav-link{padding:14px 0;font-size:15px;border-bottom:1px solid #f1f5f9}
	.ch-nav-link:hover{background:transparent}
	.ch-sub-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding:0 0 0 16px;margin:0}
	.ch-mobile-toggle{display:flex}
	.ch-footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}

@media(max-width:768px){
	.ch-header-inner{height:60px}
	.ch-logo-text{font-size:18px}
	.ch-logo-img{height:32px}
	.ch-footer-main{padding:48px 0 32px}
	.ch-footer-grid{grid-template-columns:1fr;gap:28px}
	.ch-footer-bottom-inner{flex-direction:column;gap:8px;text-align:center}
	.ch-back-to-top{bottom:20px;right:20px;width:40px;height:40px}
}

.ch-nav-overlay{position:fixed;top:0;left:0;width:100%;height:100vh;background:rgba(0,0,0,0.4);z-index:1000;opacity:0;visibility:hidden;transition:all 0.3s}
.ch-nav-overlay.ch-active{opacity:1;visibility:visible}