:root{--clr-bg: #070a12;--clr-bg-surface: #0d1322;--clr-card-bg: rgba(16, 24, 43, .65);--clr-card-border: rgba(255, 255, 255, .08);--clr-card-hover-border: rgba(0, 240, 255, .35);--clr-text-main: #f1f5f9;--clr-text-muted: #94a3b8;--clr-text-dim: #64748b;--clr-cyan: #00f0ff;--clr-purple: #8b5cf6;--clr-purple-glow: rgba(139, 92, 246, .3);--clr-gold: #f59e0b;--clr-emerald: #10b981;--clr-blue-zalo: #0068ff;--gradient-main: linear-gradient(135deg, #00f0ff 0%, #8b5cf6 50%, #ec4899 100%);--gradient-btn: linear-gradient(135deg, #00f0ff 0%, #6366f1 100%);--gradient-card: linear-gradient(180deg, rgba(255, 255, 255, .04) 0%, rgba(255, 255, 255, .01) 100%);--font-family: "Be Vietnam Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-heading: "Lexend", "Be Vietnam Pro", sans-serif;--container-width: 1240px;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 22px;--radius-full: 9999px;--shadow-glow: 0 0 35px rgba(0, 240, 255, .2);--transition-fast: .2s cubic-bezier(.4, 0, .2, 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var(--transition-fast)}.form-input:focus{outline:none;border-color:var(--clr-cyan);box-shadow:0 0 15px #00f0ff33}.site-footer{background:#04070d;border-top:1px solid var(--clr-card-border);padding-top:4rem}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:3rem;padding-bottom:3rem}.footer-desc{color:var(--clr-text-muted);font-size:.9rem;margin-top:1rem}.footer-heading{font-family:var(--font-heading);font-size:1.1rem;font-weight:700;margin-bottom:1.2rem;color:var(--clr-text-main)}.footer-links li{margin-bottom:.6rem}.footer-links a{color:var(--clr-text-muted);font-size:.9rem;transition:color var(--transition-fast)}.footer-links a:hover{color:var(--clr-cyan)}.footer-contact-info p{color:var(--clr-text-muted);font-size:.9rem;margin-bottom:.6rem;display:flex;align-items:center;gap:.6rem}.footer-bottom{border-top:1px solid rgba(255,255,255,.05);padding:1.5rem 0;font-size:.85rem;color:var(--clr-text-dim)}.footer-bottom-flex{display:flex;justify-content:space-between;align-items:center}.floating-contact{position:fixed;bottom:30px;right:30px;z-index:999;display:flex;flex-direction:column;gap:12px}.float-btn{width:54px;height:54px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.5rem;box-shadow:0 8px 25px #0006;position:relative;transition:transform var(--transition-fast)}.float-btn:hover{transform:scale(1.1)}.float-zalo{background:var(--clr-blue-zalo);animation:pulse-zalo 2s infinite}.float-phone{background:var(--clr-emerald)}.float-tooltip{position:absolute;right:65px;background:#0d1322f2;color:#fff;padding:.4rem .85rem;border-radius:var(--radius-sm);font-size:.8rem;font-weight:600;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity var(--transition-fast);border:1px solid var(--clr-card-border)}.float-zalo:hover .float-tooltip{opacity:1}@keyframes pulse-zalo{0%{box-shadow:0 0 #0068ffb3}70%{box-shadow:0 0 0 15px #0068ff00}to{box-shadow:0 0 #0068ff00}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:2000;background:#04070dd9;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);display:flex;align-items:center;justify-content:center;padding:2rem;opacity:0;pointer-events:none;transition:opacity var(--transition-smooth)}.modal-overlay.active{opacity:1;pointer-events:auto}.modal-card{width:100%;max-width:900px;max-height:90vh;overflow-y:auto;padding:2.5rem;position:relative}.modal-close{position:absolute;top:20px;right:20px;font-size:1.8rem;color:var(--clr-text-muted);transition:color var(--transition-fast)}.modal-close:hover{color:var(--clr-cyan)}.modal-header h3{font-family:var(--font-heading);font-size:1.6rem;margin:.5rem 0 .2rem}.modal-metrics{font-size:.9rem;color:var(--clr-emerald);font-weight:600}.modal-body{margin:1.5rem 0}.preview-device-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;font-size:.88rem;color:var(--clr-text-muted)}.device-switch{display:flex;gap:.5rem}.device-btn{padding:.4rem .85rem;border-radius:var(--radius-sm);background:#ffffff0d;color:var(--clr-text-muted);font-size:.85rem}.device-btn.active{background:var(--clr-cyan);color:#050b14;font-weight:700}.modal-img-container{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--clr-card-border);transition:all var(--transition-smooth);margin:0 auto}.modal-img-container.desktop-view{width:100%;max-height:400px}.modal-img-container.mobile-view{width:320px;max-height:480px}.modal-img-container img{width:100%;height:100%;object-fit:cover}.modal-features{margin-top:1.5rem;padding:1.2rem;background:#ffffff08;border-radius:var(--radius-sm)}.modal-features h4{font-size:.95rem;color:var(--clr-cyan);margin-bottom:.4rem}.modal-features p{font-size:.9rem;color:var(--clr-text-muted)}.modal-footer{display:flex;gap:1rem;justify-content:flex-end;flex-wrap:wrap}@media (max-width: 992px){.hero-grid{grid-template-columns:1fr;gap:3rem}.calc-grid,.contact-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.hero-title{font-size:2.5rem}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}.btn-glow,.pulse-dot,.hero-floating-card,.float-zalo{animation:none}}@media (max-width: 768px){.main-nav{position:fixed;top:70px;left:0;width:100%;background:#070a12fa;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);flex-direction:column;padding:2rem;gap:1.5rem;transform:translateY(-150%);transition:transform var(--transition-smooth);border-bottom:1px solid var(--clr-card-border)}.main-nav.active{transform:translateY(0)}.mobile-toggle{display:block}.hero-trust-badges,.calc-features-grid,.footer-grid{grid-template-columns:1fr}.footer-bottom-flex{flex-direction:column;gap:.5rem;text-align:center}.contact-grid{padding:2rem 1.5rem}.calculator-box{padding:2rem 1.25rem}}