@import"https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap";*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{overflow-x:hidden;width:100%}:root{--primary: #E47320;--primary-dark: #C75713;--primary-light: #FEF6EE;--accent: #E47320;--accent-dark: #C75713;--accent-light: #FEF6EE;--bg: #FDFBF7;--bg-white: #FFFFFF;--surface: #FFFFFF;--surface-alt: #F8F6F2;--text-primary: #1A1A2E;--text-secondary: #4A5568;--text-muted: #9CA3AF;--border: #E5E7EB;--border-light: #F3F4F6;--success: #059669;--warning: #D97706;--error: #DC2626;--info: #2563EB;--font-heading: "Be Vietnam Pro", system-ui, -apple-system, sans-serif;--font-body: "Be Vietnam Pro", system-ui, -apple-system, sans-serif;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--space-4xl: 6rem;--radius-sm: .375rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .05), 0 2px 4px rgba(0, 0, 0, .03);--shadow-lg: 0 10px 25px rgba(0, 0, 0, .06), 0 4px 10px rgba(0, 0, 0, .04);--shadow-xl: 0 20px 50px rgba(0, 0, 0, .08);--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease;--container-max: 1200px;--container-padding: 1.5rem}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-body);font-size:1rem;line-height:1.7;color:var(--text-primary);background-color:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}img{max-width:100%;height:auto;display:block}a{color:var(--primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--primary-dark)}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.25;color:var(--text-primary)}h1{font-size:clamp(2rem,5vw,3rem)}h2{font-size:clamp(1.5rem,3.5vw,2.25rem)}h3{font-size:clamp(1.25rem,2.5vw,1.5rem)}h4{font-size:1.125rem}p{margin-bottom:var(--space-md);color:var(--text-secondary)}.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 var(--container-padding)}.section{padding:var(--space-4xl) 0}.section-alt{background-color:var(--surface-alt)}.section-header{text-align:center;margin-bottom:var(--space-3xl)}.section-header h2{margin-bottom:var(--space-md);position:relative}.section-header p{max-width:600px;margin:0 auto;color:var(--text-secondary)}.section-label{display:inline-block;font-size:.875rem;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:.08em;margin-bottom:var(--space-sm)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:.875rem 2rem;font-family:var(--font-body);font-size:1rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);text-decoration:none;min-height:44px;min-width:44px}.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-accent{background:var(--accent);color:#fff}.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}.btn-outline:hover{background:var(--primary);color:#fff}.btn-white{background:#fff;color:var(--primary)}.btn-white:hover{background:var(--primary-light);color:var(--primary-dark)}.btn-lg{padding:1rem 2.5rem;font-size:1.125rem}.btn-sm{padding:.5rem 1.25rem;font-size:.875rem}.card{background:var(--surface);border-radius:var(--radius-lg);border:1px solid var(--border-light);padding:var(--space-xl);transition:all var(--transition-base)}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-xl)}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-xl)}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-xl)}@media(max-width:768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.btn-lg{padding:.75rem 1.25rem;font-size:1rem}.calc-submit,.dp-submit,.bs-submit,.tdtk-calc-btn{white-space:nowrap;font-size:.9375rem}.calc-submit svg,.dp-submit svg,.bs-submit svg,.tdtk-calc-btn svg{display:none}.cta-actions{flex-direction:column}.cta-actions .btn{white-space:nowrap;font-size:.9375rem;width:100%;justify-content:center}.cta-actions .btn svg{display:none}}@media(min-width:769px)and (max-width:1024px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}.text-center{text-align:center}.text-primary-color{color:var(--primary)}.text-accent-color{color:var(--accent)}.text-muted{color:var(--text-muted)}.fw-600{font-weight:600}.fw-700{font-weight:700}.mt-1{margin-top:var(--space-md)}.mt-2{margin-top:var(--space-xl)}.mb-1{margin-top:var(--space-md)}.mb-2{margin-top:var(--space-xl)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:374px){:root{--container-padding: 1rem}h1{font-size:clamp(1.5rem,7vw,2rem)}h2{font-size:clamp(1.25rem,5vw,1.75rem)}.section{padding:var(--space-2xl) 0}.btn-lg{padding:.625rem 1rem;font-size:.9375rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.form-toast-container{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:10px;pointer-events:none}.form-toast{background:#fff;border-left:4px solid var(--primary);box-shadow:var(--shadow-xl);padding:1rem 1.5rem;border-radius:var(--radius-md);display:flex;align-items:center;gap:12px;min-width:320px;max-width:480px;pointer-events:auto;animation:toastIn .3s cubic-bezier(.18,.89,.32,1.28);position:relative;overflow:hidden}.form-toast.hiding{animation:toastOut .3s forwards}.form-toast--success{border-left-color:var(--success)}.form-toast--error{border-left-color:var(--error)}.form-toast--retrying{border-left-color:var(--warning)}.form-toast-icon{font-size:1.5rem}.form-toast-body{flex:1}.form-toast-title{font-weight:700;font-size:.95rem;color:var(--text-primary)}.form-toast-msg{font-size:.85rem;color:var(--text-secondary);margin-top:2px}.form-toast-zalo{display:inline-block;margin-top:8px;font-size:.85rem;font-weight:600;color:#fff;background:#0068ff;padding:4px 12px;border-radius:var(--radius-full)}.form-toast-close{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;font-size:1.2rem;line-height:1}.qb-spinner{display:inline-block;width:1rem;height:1rem;border:2px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:qb-spin .8s linear infinite;vertical-align:middle;margin-right:8px}@keyframes qb-spin{to{transform:rotate(360deg)}}@keyframes toastIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes toastOut{to{transform:translate(100%);opacity:0}}@media(max-width:480px){.form-toast-container{left:10px;right:10px;top:10px}.form-toast{min-width:0;width:100%}}