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

:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --secondary-color: #7209b7;
    --accent-color: #f72585;
    --dark-color: #1a1a2e;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --gray-light: #e9ecef;
    --success-color: #4cc9f0;
    --warning-color: #f8961e;
    --danger-color: #e63946;
    --fashion-color: #e91e63;
    --tech-color: #2196f3;
    --food-color: #4caf50;
    --furniture-color: #795548;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --container-width: 1200px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1rem;
    color: var(--gray-color);
}

.highlight {
    color: var(--primary-color);
}

.gradient-text {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-outline {
    background-color: transparent;
    color: var(--dark-color);
    border-color: var(--gray-light);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark-color);
}

.logo i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.logo-highlight {
    color: var(--primary-color);
}

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

.nav-link {
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 0;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.nav-actions {
    display: flex;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f5f7ff 0%, #e3e9ff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(45deg, transparent 50%, rgba(67, 97, 238, 0.05) 50%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-color);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-item p {
    font-size: 0.9rem;
    color: var(--gray-color);
}

/* AI Interface Preview */
.image-container {
    position: relative;
}

.ai-interface {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-10deg);
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}

.ai-interface:hover {
    transform: perspective(1000px) rotateY(-5deg);
}

.ai-header {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ai-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28ca42; }

.ai-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.ai-messages {
    padding: 20px;
    min-height: 300px;
    max-height: 300px;
    overflow-y: auto;
}

.message {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    opacity: 0;
    animation: fadeIn 0.5s forwards;
}

.message.user {
    justify-content: flex-end;
}

.message.user .text {
    background: var(--primary-color);
    color: white;
    border-radius: 18px 18px 0 18px;
}

.message.bot .text {
    background: var(--gray-light);
    color: var(--dark-color);
    border-radius: 18px 18px 18px 0;
}

.message .text {
    padding: 12px 16px;
    max-width: 70%;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: white;
}

.ai-input {
    padding: 20px;
    border-top: 1px solid var(--gray-light);
    display: flex;
    gap: 10px;
}

.ai-input input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.send-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.send-btn:hover {
    background: var(--primary-dark);
    transform: rotate(15deg);
}

.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 10px 20px 0 50px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: typing 1s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

.chat-controls {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.chat-industry-btn {
    padding: 8px 16px;
    border: 1px solid var(--gray-light);
    border-radius: 20px;
    background: white;
    color: var(--gray-color);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.chat-industry-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.chat-industry-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Features Section */
.features {
    padding: 100px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

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

.feature-card {
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border-top: 4px solid var(--primary-color);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(67, 97, 238, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

/* Industries Section */
.industries {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
}

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

.industry-card {
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border-top: 4px solid;
}

.industry-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.industry-card:nth-child(1) {
    border-top-color: var(--fashion-color);
}

.industry-card:nth-child(2) {
    border-top-color: var(--tech-color);
}

.industry-card:nth-child(3) {
    border-top-color: var(--food-color);
}

.industry-card:nth-child(4) {
    border-top-color: var(--furniture-color);
}

.industry-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.8rem;
    color: white;
}

.industry-card:nth-child(1) .industry-icon {
    background: var(--fashion-color);
}

.industry-card:nth-child(2) .industry-icon {
    background: var(--tech-color);
}

.industry-card:nth-child(3) .industry-icon {
    background: var(--food-color);
}

.industry-card:nth-child(4) .industry-icon {
    background: var(--furniture-color);
}

.industry-chat-preview {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--gray-light);
    border-radius: var(--border-radius);
}

.chat-bubble {
    padding: 8px 12px;
    margin-bottom: 8px;
    border-radius: 12px;
    font-size: 0.9rem;
    max-width: 90%;
}

.chat-bubble.bot {
    background: white;
    color: var(--dark-color);
    text-align: left;
    margin-right: auto;
}

.chat-bubble.user {
    background: var(--primary-color);
    color: white;
    text-align: right;
    margin-left: auto;
}

/* Process Section */
.process {
    padding: 100px 0;
    background: white;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.process-step {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
}

.step-content h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.step-features {
    list-style: none;
    margin-top: 1rem;
}

.step-features li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.step-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.process-diagram {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.diagram-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.diagram-item {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 600;
    min-width: 300px;
}

.diagram-item.start {
    background: var(--success-color);
}

.diagram-item.end {
    background: var(--success-color);
}

.diagram-item.decision {
    background: var(--warning-color);
}

.diagram-arrow {
    font-size: 1.5rem;
    color: var(--primary-color);
    animation: bounce 2s infinite;
}

.diagram-branch {
    display: flex;
    gap: 3rem;
    margin: 1rem 0;
}

.branch-yes, .branch-no {
    padding: 0.5rem 1rem;
    background: var(--gray-light);
    border-radius: var(--border-radius);
    font-weight: 500;
}

.branch-yes {
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.branch-no {
    color: var(--gray-color);
    border-left: 4px solid var(--gray-color);
}

/* Demo Section */
.demo {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
}

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

.scenario-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.scenario-card:hover {
    transform: translateY(-5px);
}

.scenario-header {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.scenario-header i {
    font-size: 1.5rem;
}

.scenario-content {
    padding: 1.5rem;
}

.scenario-content .message {
    margin-bottom: 1rem;
    opacity: 1;
    animation: none;
}

.scenario-content .message.user .text {
    background: var(--gray-light);
    color: var(--dark-color);
    border-radius: 18px 18px 18px 0;
}

.scenario-content .message.bot .text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 18px 18px 0 18px;
}

.scenario-result {
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--gray-light);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
    text-align: center;
}

/* Pricing Section */
.pricing {
    padding: 100px 0;
    background: white;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    position: relative;
    transition: var(--transition);
    border: 2px solid transparent;
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
}

.pricing-card.popular {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--gray-light);
}

.price {
    margin: 1rem 0;
    color: var(--dark-color);
}

.amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
}

.period {
    color: var(--gray-color);
    font-size: 1rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features i.fa-check {
    color: var(--primary-color);
}

.pricing-features i.fa-times {
    color: var(--gray-color);
}

/* CTA Section */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.cta-container {
    text-align: center;
}

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

.cta .highlight {
    color: #ffd166;
}

.cta p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.cta-form {
    max-width: 500px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 1rem;
}

.input-group input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.form-note {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 80px 0 0;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

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

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--primary-color);
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin: 1rem 0;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
}

/* Chat Widget */
.chat-widget {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 350px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    z-index: 1001;
    display: none;
    flex-direction: column;
    overflow: hidden;
    border: 2px solid var(--primary-color);
}

.chat-widget.active {
    display: flex;
}

.chat-header {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.chat-info h4 {
    margin: 0;
    font-size: 1rem;
}

.chat-info p {
    margin: 0;
    font-size: 0.8rem;
    opacity: 0.8;
}

.chat-close {
    margin-left: auto;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 1.2rem;
}

.chat-body {
    height: 300px;
    padding: 15px;
    overflow-y: auto;
    background: #f8f9fa;
}

.chat-message {
    margin-bottom: 10px;
}

.chat-message.bot .message-content {
    background: white;
    padding: 10px 15px;
    border-radius: 18px 18px 18px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    max-width: 80%;
}

.chat-message.user .message-content {
    background: var(--primary-color);
    color: white;
    padding: 10px 15px;
    border-radius: 18px 18px 0 18px;
    margin-left: auto;
    max-width: 80%;
}

.chat-input {
    padding: 15px;
    border-top: 1px solid var(--gray-light);
    display: flex;
    gap: 10px;
}

.chat-input input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
}

.chat-send {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.chat-send:hover {
    background: var(--primary-dark);
    transform: rotate(15deg);
}

.chat-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50px;
    padding: 15px 25px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(67, 97, 238, 0.3);
    z-index: 1000;
    transition: var(--transition);
}

.chat-toggle:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.4);
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: 90px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes typing {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Responsive Styles */
@media (max-width: 1024px) {
    h1 {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-image {
        order: -1;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.popular {
        transform: none;
    }
    
    .pricing-card.popular:hover {
        transform: translateY(-10px);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-actions {
        display: none;
    }
    
    .hero {
        padding: 140px 0 60px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .features-grid,
    .pricing-cards,
    .demo-scenarios,
    .industries-grid {
        grid-template-columns: 1fr;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .ai-interface {
        transform: none;
    }
    
    .chat-widget {
        width: calc(100% - 40px);
        right: 20px;
        bottom: 80px;
    }
    
    .chat-toggle span {
        display: none;
    }
    
    .chat-toggle {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .btn-large {
        padding: 14px 24px;
        font-size: 1rem;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
    
    .process-step {
        flex-direction: column;
        text-align: center;
    }
    
    .step-number {
        margin: 0 auto;
    }
    
    .diagram-item {
        min-width: auto;
        width: 100%;
    }
    
    .diagram-branch {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Industry Chat Demos Section */
.industry-demos {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
}

.demo-chat-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.demo-chat-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}

.demo-chat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(67, 97, 238, 0.15);
}

.demo-chat-header {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.demo-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.demo-title i {
    font-size: 1.5rem;
}

.demo-title h3 {
    margin: 0;
    font-size: 1.2rem;
}

.demo-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: #4caf50;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-text {
    font-size: 0.8rem;
    opacity: 0.9;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.demo-chat-window {
    padding: 1.5rem;
    height: 400px;
    overflow-y: auto;
    background: #f8f9fa;
}

.demo-chat-window .message {
    animation: fadeInUp 0.5s forwards;
    animation-delay: calc(var(--message-index) * 0.2s);
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.demo-chat-window .message .avatar {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
}

.demo-chat-window .message .text {
    padding: 10px 14px;
    font-size: 0.9rem;
    max-width: 80%;
}

.demo-chat-stats {
    display: flex;
    justify-content: space-around;
    padding: 1rem;
    background: white;
    border-top: 1px solid var(--gray-light);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--gray-color);
    margin-top: 4px;
}

/* Auto Chat Demos Section */
.auto-chat-demos {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
}

.demo-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.speed-control span {
    font-weight: 500;
    color: var(--dark-color);
}

.speed-btn {
    padding: 8px 16px;
    border: 1px solid var(--gray-light);
    border-radius: 20px;
    background: white;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
}

.speed-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.speed-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.demo-chat-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.demo-chat-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}

.demo-chat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(67, 97, 238, 0.15);
}

.demo-chat-header {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.demo-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.demo-title i {
    font-size: 1.5rem;
}

.demo-title h3 {
    margin: 0;
    font-size: 1.2rem;
}

.demo-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: #4caf50;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-text {
    font-size: 0.8rem;
    opacity: 0.9;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.demo-chat-window {
    padding: 1.5rem;
    height: 400px;
    overflow-y: auto;
    background: #f8f9fa;
}

.demo-chat-window .message {
    margin-bottom: 10px;
    display: flex;
    gap: 10px;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.demo-chat-window .message.show {
    opacity: 1;
    transform: translateY(0);
}

.demo-chat-window .message.user {
    justify-content: flex-end;
}

.demo-chat-window .message .avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: white;
    font-size: 0.8rem;
}

.demo-chat-window .message .text {
    padding: 10px 14px;
    font-size: 0.9rem;
    max-width: 80%;
    border-radius: 12px;
}

.demo-chat-window .message.user .text {
    background: var(--primary-color);
    color: white;
    border-radius: 12px 12px 0 12px;
}

.demo-chat-window .message.bot .text {
    background: white;
    color: var(--dark-color);
    border-radius: 12px 12px 12px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.demo-chat-stats {
    display: flex;
    justify-content: space-around;
    padding: 1rem;
    background: white;
    border-top: 1px solid var(--gray-light);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--gray-color);
    margin-top: 4px;
}

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

.info-card {
    padding: 1.5rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.info-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.info-card h4 {
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.info-card p {
    font-size: 0.9rem;
    color: var(--gray-color);
    margin: 0;
}

/* Hero Chat Updates */
.hero .ai-input {
    position: relative;
    padding: 15px;
    background: var(--gray-light);
}

.auto-chat-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.9rem;
}

.chat-controls {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.chat-control-btn {
    padding: 8px 16px;
    border: 1px solid var(--gray-light);
    border-radius: 20px;
    background: white;
    color: var(--gray-color);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
}

.chat-control-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.chat-control-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 10px 20px 0 50px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: typing 1s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

/* Bỏ tất cả CSS liên quan đến chat widget và chat toggle */
.chat-widget,
.chat-toggle {
    display: none !important;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .demo-controls {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .speed-control {
        justify-content: center;
    }
    
    .demo-chat-container {
        grid-template-columns: 1fr;
    }
    
    .demo-info {
        grid-template-columns: 1fr;
    }
}

/* Contact Floating Button */
.contact-floating {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 1000;
}

.contact-main-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(67, 97, 238, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1002;
}

.contact-main-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(67, 97, 238, 0.4);
}

.contact-main-btn.active {
    transform: rotate(135deg);
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
}

.contact-options {
    position: absolute;
    bottom: 70px;
    left: 0;
    display: flex;
    flex-direction: column;
    gap: 15px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-floating.active .contact-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.contact-option {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 20px;
    background: white;
    border-radius: 50px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    transform: translateX(-20px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: max-content;
}

.contact-floating.active .contact-option {
    transform: translateX(0);
    opacity: 1;
}

.contact-floating.active .contact-option:nth-child(1) {
    transition-delay: 0.1s;
}

.contact-floating.active .contact-option:nth-child(2) {
    transition-delay: 0.2s;
}

.contact-floating.active .contact-option:nth-child(3) {
    transition-delay: 0.3s;
}

.contact-option:hover {
    transform: translateX(5px) !important;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.contact-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

/* Different colors for each hotline */
.contact-option.hotline-1 .contact-icon {
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
}

.contact-option.hotline-2 .contact-icon {
    background: linear-gradient(135deg, #2196F3, #0D47A1);
}

.contact-option.hotline-3 .contact-icon {
    background: linear-gradient(135deg, #FF9800, #E65100);
}

.contact-info {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--gray-color);
    font-weight: 500;
}

.contact-number {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark-color);
    white-space: nowrap;
}

.contact-tooltip {
    position: absolute;
    top: 50%;
    right: -180px;
    transform: translateY(-50%);
    background: var(--dark-color);
    color: white;
    padding: 8px 15px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.contact-tooltip .tooltip-arrow {
    position: absolute;
    left: -6px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-right: 6px solid var(--dark-color);
}

.contact-main-btn:hover + .contact-tooltip {
    opacity: 1;
    visibility: visible;
    right: -170px;
}

/* Pulse animation */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(67, 97, 238, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(67, 97, 238, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(67, 97, 238, 0);
    }
}

.contact-main-btn {
    animation: pulse 2s infinite;
}

/* Phone icon colors for different hotlines */
.contact-option.hotline-1 .contact-icon i {
    color: white;
}

.contact-option.hotline-2 .contact-icon i {
    color: white;
}

.contact-option.hotline-3 .contact-icon i {
    color: white;
}

/* Hover effects for each hotline */
.contact-option.hotline-1:hover .contact-icon {
    background: linear-gradient(135deg, #66BB6A, #388E3C);
}

.contact-option.hotline-2:hover .contact-icon {
    background: linear-gradient(135deg, #42A5F5, #1565C0);
}

.contact-option.hotline-3:hover .contact-icon {
    background: linear-gradient(135deg, #FFB74D, #F57C00);
}

/* Responsive */
@media (max-width: 768px) {
    .contact-floating {
        bottom: 20px;
        left: 20px;
    }
    
    .contact-main-btn {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }
    
    .contact-option {
        padding: 10px 15px;
        gap: 12px;
    }
    
    .contact-icon {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
    
    .contact-number {
        font-size: 0.9rem;
    }
    
    .contact-tooltip {
        display: none;
    }
}

/* Prevent overlap with back to top button */
@media (max-width: 480px) {
    .back-to-top {
        right: 20px;
        bottom: 80px;
    }
    
    .contact-floating {
        bottom: 15px;
        left: 15px;
    }
}