/* Reset và Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

/* Custom Scrollbar Styles */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
    transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

::-webkit-scrollbar-corner {
    background: #f1f5f9;
}

/* Firefox Scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 #f1f5f9;
}

/* Custom scrollbar for all scrollable elements */
*::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

*::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

*::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
    transition: background 0.3s ease;
}

*::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

*::-webkit-scrollbar-corner {
    background: #f1f5f9;
}

/* Mobile scrollbar - smaller and always visible */
@media (max-width: 768px) {
    *::-webkit-scrollbar {
        width: 6px !important;
        height: 6px !important;
    }
    
    *::-webkit-scrollbar-track {
        background: #f8fafc !important;
        border-radius: 3px !important;
    }
    
    *::-webkit-scrollbar-thumb {
        background: #cbd5e1 !important;
        border-radius: 3px !important;
    }
    
    *::-webkit-scrollbar-thumb:hover {
        background: #94a3b8 !important;
    }
    
    /* Force scrollbar to be visible on mobile */
    body {
        overflow-y: scroll !important;
        -webkit-overflow-scrolling: touch !important;
    }
    
    /* Ensure scrollbar is visible in customer service menu */
    .cs-menu-items {
        overflow-y: scroll !important;
        -webkit-overflow-scrolling: touch !important;
        scrollbar-width: thin !important;
        scrollbar-color: #cbd5e1 #f8fafc !important;
    }
    
    /* Force scrollbar visibility */
    .cs-menu-items::-webkit-scrollbar {
        -webkit-appearance: none !important;
        width: 6px !important;
    }
    
    .cs-menu-items::-webkit-scrollbar-track {
        background: #f8fafc !important;
        border-radius: 3px !important;
    }
    
    .cs-menu-items::-webkit-scrollbar-thumb {
        background: #cbd5e1 !important;
        border-radius: 3px !important;
        border: 1px solid #e2e8f0 !important;
    }
}

/* Additional mobile breakpoints for scrollbar */
@media (max-width: 480px) {
    .cs-menu-items::-webkit-scrollbar {
        width: 5px !important;
    }
    
    .cs-menu-items::-webkit-scrollbar-thumb {
        background: #94a3b8 !important;
        border: 1px solid #cbd5e1 !important;
    }
}

@media (max-width: 375px) {
    .cs-menu-items::-webkit-scrollbar {
        width: 4px !important;
    }
}

@media (max-width: 320px) {
    .cs-menu-items::-webkit-scrollbar {
        width: 3px !important;
    }
}

/* Force mobile styles with orientation */
@media (max-width: 768px) and (orientation: portrait) {
    .customer-service {
        bottom: 20px !important;
        right: 25px !important;
    }
    
    .cs-button {
        width: 55px !important;
        height: 55px !important;
    }
    
    .cs-menu {
        width: 260px !important;
        bottom: 80px !important;
        right: 0 !important;
    }
    
    .cs-menu-items {
        overflow-y: scroll !important;
        -webkit-overflow-scrolling: touch !important;
    }
}

@media (max-width: 480px) and (orientation: portrait) {
    .customer-service {
        bottom: 15px !important;
        right: 20px !important;
    }
    
    .cs-button {
        width: 50px !important;
        height: 50px !important;
    }
    
    .cs-menu {
        width: 240px !important;
        bottom: 75px !important;
    }
}

/* Touch device specific styles */
@media (hover: none) and (pointer: coarse) {
    .customer-service {
        bottom: 20px !important;
        right: 25px !important;
    }
    
    .cs-button {
        width: 55px !important;
        height: 55px !important;
    }
    
    .cs-menu-items {
        overflow-y: scroll !important;
        -webkit-overflow-scrolling: touch !important;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 0.5rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    gap: 1rem;
}

.nav-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.nav-logo h2 {
    color: #2563eb;
    font-weight: 700;
    font-size: 2.2rem;
    margin: 0;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
}

.logo-domain {
    color: #6b7280;
    font-weight: 500;
    font-size: 1.4rem;
    margin-left: 2px;
}

.nav-slogan {
    color: #374151;
    font-size: 0.7rem;
    font-weight: 600;
    margin: 0;
    margin-top: -8px;
    letter-spacing: 0.8px;
    text-align: center;
    text-transform: uppercase;
    opacity: 1;
}

.logo-link {
    text-decoration: none !important;
    color: inherit;
    display: block;
    transition: opacity 0.3s ease;
}

.logo-link:hover {
    opacity: 0.8;
    text-decoration: none !important;
}

.logo-link:focus {
    text-decoration: none !important;
}

.logo-link:active {
    text-decoration: none !important;
}

.logo-link h2,
.logo-link p {
    text-decoration: none !important;
}

.logo-link:hover h2,
.logo-link:hover p {
    text-decoration: none !important;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.language-selector {
    position: relative;
}

/* Custom Select Styles */
.custom-select {
    position: relative;
    cursor: pointer;
    user-select: none;
}

.select-selected {
    padding: 0.5rem 0.5rem 0.5rem 2.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    background: white;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s ease;
    min-width: 160px;
    width: auto;
}

.select-selected:hover {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.select-selected .flag-icon {
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.select-selected i {
    color: #666;
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.custom-select.active .select-selected i {
    transform: rotate(180deg);
}

/* Dropdown Options */
.select-items {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 1000;
    background: white;
    border: 1px solid #e5e7eb;
    border-top: none;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-height: 200px;
    overflow-y: auto;
    min-width: 160px;
    width: auto;
}

.select-hide {
    display: none;
}

.select-option {
    padding: 0.75rem 0.5rem 0.75rem 2.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    position: relative;
    transition: background-color 0.3s ease;
}

.select-option:hover {
    background-color: #f3f4f6;
}

.select-option.selected {
    background-color: #eff6ff;
    color: #2563eb;
}

.select-option .flag-icon {
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.select-option span {
    font-size: 0.9rem;
    font-weight: 500;
}

/* Hidden original select */
.language-selector select {
    display: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.1)" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: #6b7280;
    color: white;
    border: 2px solid #6b7280;
}

.btn-secondary:hover {
    background: #4b5563;
    border-color: #4b5563;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(107, 114, 128, 0.3);
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

/* Hero Banner */
.hero-banner {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #3b82f6, #1d4ed8);
    border-radius: 20px 20px 0 0;
    z-index: 2;
}

.hero-banner:hover {
    transform: perspective(1000px) rotateY(-2deg) rotateX(2deg);
    box-shadow: 0 30px 60px rgba(37, 99, 235, 0.2);
}

.banner-image {
    width: 100%;
    height: auto;
    display: block;
    transition: all 0.3s ease;
    border-radius: 20px;
}

.hero-banner:hover .banner-image {
    transform: scale(1.02);
}

/* Animation for banner - removed to prevent hiding */

/* Section Styles */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
}

/* Problems Section */
.problems {
    padding: 40px 0 80px;
    background: #f8fafc;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.problem-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-left: 4px solid #ef4444;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.problem-icon {
    width: 60px;
    height: 60px;
    background: #fef2f2;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.problem-icon i {
    font-size: 1.5rem;
    color: #ef4444;
}

.problem-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.problem-card p {
    color: #6b7280;
    line-height: 1.6;
}

.problems-cta {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: #2563eb;
}

/* Benefits Section */
.benefits {
    padding: 80px 0;
    background: white;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.benefit-card {
    text-align: center;
    padding: 2rem;
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: #2563eb;
}

.benefit-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.benefit-icon i {
    font-size: 2rem;
    color: white;
}

.benefit-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.benefit-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Modules Section */
.modules {
    padding: 80px 0;
    background: #f8fafc;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.module-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-top: 4px solid #2563eb;
}

.module-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.module-icon {
    width: 60px;
    height: 60px;
    background: #eff6ff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.module-icon i {
    font-size: 1.5rem;
    color: #2563eb;
}

.module-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.module-card p {
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.module-benefit {
    background: #f0f9ff;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #0ea5e9;
    font-size: 0.9rem;
    color: #0369a1;
}

/* Business Types Section */
.business-types {
    padding: 80px 0;
    background: white;
}

.business-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.business-type-card {
    text-align: center;
    padding: 2rem;
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 2px solid #e5e7eb;
}

.business-type-card:hover {
    transform: translateY(-5px);
    border-color: #2563eb;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.1);
}

.business-type-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #10b981, #34d399);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.business-type-icon i {
    font-size: 2rem;
    color: white;
}

.business-type-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1f2937;
}

.business-types-cta {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: #2563eb;
}

/* Comparison Section */
.comparison {
    padding: 80px 0;
    background: #f8fafc;
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
}

.comparison-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.comparison-bad {
    border-left: 4px solid #ef4444;
}

.comparison-good {
    border-left: 4px solid #10b981;
}

.comparison-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.comparison-bad h3 {
    color: #ef4444;
}

.comparison-good h3 {
    color: #10b981;
}

.comparison-card ul {
    list-style: none;
}

.comparison-card li {
    padding: 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid #f3f4f6;
}

.comparison-card li:last-child {
    border-bottom: none;
}

.comparison-bad li i {
    color: #ef4444;
}

.comparison-good li i {
    color: #10b981;
}

.comparison-vs {
    display: flex;
    justify-content: center;
    align-items: center;
}

.vs-circle {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #f9fafb;
}

.footer-section h3 {
    font-size: 1.5rem;
    color: #2563eb;
}

.footer-section p {
    color: #d1d5db;
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #2563eb;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #374151;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

/* Custom scrollbar for modal */
.modal::-webkit-scrollbar {
    width: 6px;
}

.modal::-webkit-scrollbar-track {
    background: #f8fafc;
    border-radius: 3px;
}

.modal::-webkit-scrollbar-thumb {
    background: #e2e8f0;
    border-radius: 3px;
    transition: background 0.3s ease;
}

.modal::-webkit-scrollbar-thumb:hover {
    background: #cbd5e1;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    color: #6b7280;
    transition: color 0.3s ease;
}

.close:hover {
    color: #ef4444;
}

.modal h2 {
    margin-bottom: 2rem;
    color: #1f2937;
    font-size: 1.8rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-logo h2 {
        font-size: 1.8rem;
    }
    
    .logo-domain {
        font-size: 1.1rem;
    }
    
    .nav-slogan {
        font-size: 0.6rem;
        margin-top: -4px;
        letter-spacing: 0.6px;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .language-selector {
        position: static;
        margin-right: 1rem;
        order: 2;
    }
    
    .nav-menu {
        order: 3;
    }
    
    .nav-toggle {
        order: 4;
    }
    
    .custom-select {
        min-width: 120px;
    }
    
    .select-selected {
        padding: 0.4rem 0.4rem 0.4rem 2rem;
        font-size: 0.8rem;
        min-width: 120px;
    }
    
    .select-selected span {
        font-size: 0.8rem;
    }
    
    .hero-banner {
        transform: none;
        margin: 0 auto;
        max-width: 400px;
    }
    
    .hero-banner:hover {
        transform: none;
    }
    
    .banner-image {
        max-width: 100%;
        height: auto;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .comparison-vs {
        order: -1;
    }

    .vs-circle {
        width: 60px;
        height: 60px;
        font-size: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-section h2 {
        font-size: 2rem;
    }

    .modal-content {
        margin: 10% auto;
        width: 95%;
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .problems-grid,
    .benefits-grid,
    .modules-grid,
    .business-types-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading animation */
.loading {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.loading.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Hover effects for cards */
.problem-card:hover .problem-icon,
.benefit-card:hover .benefit-icon,
.module-card:hover .module-icon {
    transform: scale(1.1);
    transition: transform 0.3s ease;
}

/* Gradient text effect */
.gradient-text {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Customer Service Button */
.customer-service {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    font-family: 'Inter', sans-serif;
}

/* Mobile responsive for customer service */
@media (max-width: 768px) {
    .customer-service {
        bottom: 20px !important;
        right: 25px !important;
    }
    
    .cs-button {
        width: 55px !important;
        height: 55px !important;
    }
    
    .cs-button i {
        font-size: 1.1rem !important;
        margin-bottom: 1px !important;
    }
    
    .cs-button span {
        font-size: 0.6rem !important;
    }
    
    .cs-menu {
        width: 260px !important;
        bottom: 80px !important;
        right: 0 !important;
    }
    
    .cs-menu-items {
        max-height: 250px !important;
        overflow-y: scroll !important;
        -webkit-overflow-scrolling: touch !important;
    }
}

@media (max-width: 480px) {
    .customer-service {
        bottom: 15px !important;
        right: 20px !important;
    }
    
    .cs-button {
        width: 50px !important;
        height: 50px !important;
    }
    
    .cs-button i {
        font-size: 1rem !important;
        margin-bottom: 1px !important;
    }
    
    .cs-button span {
        font-size: 0.55rem !important;
    }
    
    .cs-menu {
        width: 240px !important;
        bottom: 75px !important;
        right: 0 !important;
    }
    
    .cs-menu-items {
        max-height: 200px !important;
        overflow-y: scroll !important;
        -webkit-overflow-scrolling: touch !important;
    }
}

/* Additional mobile breakpoints for better coverage */
@media (max-width: 375px) {
    .customer-service {
        bottom: 10px !important;
        right: 15px !important;
    }
    
    .cs-button {
        width: 45px !important;
        height: 45px !important;
    }
    
    .cs-button i {
        font-size: 0.9rem !important;
    }
    
    .cs-button span {
        font-size: 0.5rem !important;
    }
    
    .cs-menu {
        width: 220px !important;
        bottom: 70px !important;
    }
}

@media (max-width: 320px) {
    .customer-service {
        bottom: 8px !important;
        right: 12px !important;
    }
    
    .cs-button {
        width: 40px !important;
        height: 40px !important;
    }
    
    .cs-button i {
        font-size: 0.8rem !important;
    }
    
    .cs-button span {
        font-size: 0.45rem !important;
    }
    
    .cs-menu {
        width: 200px !important;
        bottom: 65px !important;
    }
}

.cs-button {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
    color: white;
    position: relative;
}

.cs-button:hover {
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.cs-button i {
    font-size: 1.2rem;
    margin-bottom: 2px;
}

.cs-button span {
    font-size: 0.7rem;
    font-weight: 500;
}

/* Customer Service Menu */
.cs-menu {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 280px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.9);
    transition: all 0.3s ease;
    overflow: hidden;
    overflow-x: hidden;
}

.cs-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.cs-menu-header {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cs-menu-header h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.cs-close {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    z-index: 1002;
    position: relative;
}

.cs-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.cs-menu-items {
    padding: 1rem;
    max-height: 300px;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Custom scrollbar for customer service menu */
.cs-menu-items::-webkit-scrollbar {
    width: 8px;
}

.cs-menu-items::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

.cs-menu-items::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 4px;
    transition: background 0.3s ease;
}

.cs-menu-items::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* Mobile scrollbar for customer service menu */
@media (max-width: 768px) {
    .cs-menu-items::-webkit-scrollbar {
        width: 6px;
    }
    
    .cs-menu-items::-webkit-scrollbar-track {
        background: #f8fafc;
        border-radius: 3px;
    }
    
    .cs-menu-items::-webkit-scrollbar-thumb {
        background: #cbd5e1;
        border-radius: 3px;
    }
    
    .cs-menu-items::-webkit-scrollbar-thumb:hover {
        background: #94a3b8;
    }
}

.cs-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    text-decoration: none;
    color: #374151;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    position: relative;
}

.cs-item:last-child {
    margin-bottom: 0;
}

.cs-item:hover {
    background: #f3f4f6;
    color: #2563eb;
}

.cs-item i {
    width: 24px;
    font-size: 1.1rem;
    margin-right: 0.75rem;
    text-align: center;
}

.cs-item .cs-icon {
    width: 24px;
    height: 24px;
    margin-right: 0.75rem;
    object-fit: contain;
}

.cs-item span {
    font-weight: 500;
    font-size: 0.9rem;
}

/* Social Media Colors */
.cs-item[href*="zalo"] i { color: #0068ff; }
.cs-item[href*="messenger"] i { color: #0084ff; }
.cs-item[href*="whatsapp"] i { color: #25d366; }
.cs-item[href*="telegram"] i { color: #0088cc; }
.cs-item[href*="weixin"] i { color: #07c160; }
.cs-item[href*="line"] i { color: #00b900; }
.cs-item[href*="kakao"] i { color: #fee500; }
.cs-item[href*="phone"] i { color: #2563eb; }
.cs-item[href*="mailto"] i { color: #dc2626; }

/* Tooltip for CS items */
.cs-item[data-tooltip] {
    position: relative;
}

.cs-item[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: #1f2937;
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    white-space: nowrap;
    margin-left: 0.5rem;
    z-index: 1001;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.cs-item[data-tooltip]:hover::before {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-right-color: #1f2937;
    margin-left: -0.5rem;
    z-index: 1001;
}

/* Responsive Design for Customer Service */
@media (max-width: 768px) {
    .customer-service {
        bottom: 15px;
        right: 15px;
    }
    
    .cs-button {
        width: 55px;
        height: 55px;
    }
    
    .cs-menu {
        width: 260px;
        bottom: 75px;
        right: -10px;
    }
    
    .cs-menu-items {
        max-height: 250px;
    }
}

@media (max-width: 480px) {
    .cs-menu {
        width: 240px;
        right: -20px;
    }
    
    .cs-item {
        padding: 0.6rem;
    }
    
    .cs-item i {
        width: 20px;
        font-size: 1rem;
        margin-right: 0.6rem;
    }
    
    .cs-item span {
        font-size: 0.85rem;
    }
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.pricing .section-subtitle {
    text-align: center;
    color: #64748b;
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-overview {
    margin-bottom: 4rem;
}

.pricing-info {
    display: flex;
    justify-content: center;
    margin-bottom: 4rem;
}

.price-display {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    width: 100%;
}

.price-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #1d4ed8);
}

.price-display:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.price-display i {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 1.5rem;
    display: block;
}

.price-display h3 {
    color: #1f2937;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.price-range {
    color: #2563eb;
    font-weight: 800;
    font-size: 2rem;
}

.price-display p {
    color: #64748b;
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0;
}

.pricing-factors {
    margin-top: 4rem;
}

.pricing-factors h3 {
    text-align: center;
    color: #1f2937;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 3rem;
}

.factors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.factor-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.factor-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.factor-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
}

.factor-card h4 {
    color: #1f2937;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.factor-card p {
    color: #64748b;
    line-height: 1.6;
    margin: 0;
}

.pricing-cta {
    text-align: center;
    background: white;
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-top: 3rem;
}

.pricing-cta h3 {
    color: #1f2937;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.pricing-cta p {
    color: #64748b;
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Responsive Design for Pricing */
@media (max-width: 768px) {
    .price-display {
        padding: 2rem;
        margin: 0;
    }
    
    .price-display h3 {
        font-size: 1.5rem;
    }
    
    .price-range {
        font-size: 1.6rem;
    }
    
    .price-display i {
        font-size: 2.5rem;
    }
    
    .factors-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .pricing-cta {
        padding: 2rem;
    }
    
    .pricing-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .pricing-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}

/* FAQ Section */
.faq {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.faq .section-subtitle {
    text-align: center;
    color: #64748b;
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

.faq-question {
    padding: 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: #f8fafc;
}

.faq-question h3 {
    color: #1f2937;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.4;
    flex: 1;
    padding-right: 1rem;
}

.faq-question i {
    color: #2563eb;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: #f8fafc;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-content {
    padding: 0 2rem 2rem;
}

.faq-answer p {
    color: #4b5563;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.faq-answer ul {
    color: #4b5563;
    line-height: 1.6;
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.faq-answer li {
    margin-bottom: 0.5rem;
}

.faq-answer strong {
    color: #1f2937;
    font-weight: 600;
}

/* Responsive Design for FAQ */
@media (max-width: 768px) {
    .faq {
        padding: 60px 0;
    }
    
    .faq-container {
        padding: 0 1rem;
    }
    
    .faq-question {
        padding: 1.5rem;
    }
    
    .faq-question h3 {
        font-size: 1rem;
    }
    
    .faq-answer-content {
        padding: 0 1.5rem 1.5rem;
    }
}