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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.gradient-text {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34, 197, 94, 0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #1e40af;
}

/* Section Badges */
.section-badge, .hero-badge, .cta-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59, 130, 246, 0.1);
    color: #1e40af;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.hero-badge, .cta-badge {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 24px;
    color: #1f2937;
}

.section-description {
    font-size: 1.25rem;
    color: #6b7280;
    max-width: 800px;
    margin: 0 auto;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    padding: 16px 0;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 8px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-text h1 {
    font-size: 1.25rem;
    margin: 0;
    color: white;
    transition: color 0.3s ease;
}

.logo-text p {
    font-size: 0.875rem;
    margin: 0;
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s ease;
}

.header.scrolled .logo-text h1 {
    color: #1e40af;
}

.header.scrolled .logo-text p {
    color: #6b7280;
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav a {
    text-decoration: none;
    font-weight: 500;
    color: white;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #3b82f6;
}

.header.scrolled .nav a {
    color: #4b5563;
}

.nav .cta-button {
    background: #3b82f6;
    color: white !important;
    padding: 8px 20px;
    border-radius: 50px;
}

.nav .cta-button:hover {
    background: #1e40af;
    color: white !important;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: white;
    transition: all 0.3s ease;
}

.header.scrolled .mobile-menu-btn span {
    background: #4b5563;
}

.mobile-nav {
    display: none;
    flex-direction: column;
    gap: 16px;
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-top: 16px;
}

.mobile-nav a {
    color: #4b5563;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 1px solid #e5e7eb;
}

.mobile-nav a:last-child {
    border-bottom: none;
    color: #3b82f6;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #3b82f6 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    opacity: 0.1;
}

.hero-pattern {
    position: absolute;
    top: 80px;
    left: 40px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, white 1px, transparent 1px);
    background-size: 20px 20px;
    border-radius: 50%;
    filter: blur(1px);
}

.hero-pattern::after {
    content: '';
    position: absolute;
    bottom: -200px;
    right: -200px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 1px, transparent 1px);
    background-size: 30px 30px;
    border-radius: 50%;
    filter: blur(2px);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 10;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    color: white;
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    line-height: 1.6;
}

.hero-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.9);
}

.benefit-item svg {
    color: #22c55e;
    flex-shrink: 0;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-circle {
    position: relative;
    width: 400px;
    height: 400px;
}

.circle-outer {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
    border-radius: 50%;
    animation: pulse 3s ease-in-out infinite;
}

.circle-inner {
    position: absolute;
    inset: 16px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1e40af;
}

.floating-icon {
    position: absolute;
    width: 64px;
    height: 64px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    color: #1e40af;
    animation: float 3s ease-in-out infinite;
}

.icon-1 {
    top: 32px;
    right: 32px;
    animation-delay: 0s;
}

.icon-2 {
    bottom: 48px;
    left: 48px;
    animation-delay: 1s;
}

.icon-3 {
    top: 50%;
    left: 0;
    width: 48px;
    height: 48px;
    animation-delay: 2s;
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid white;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-wheel {
    width: 4px;
    height: 12px;
    background: white;
    border-radius: 2px;
    animation: scroll 2s infinite;
}

/* Values Section */
.values {
    padding: 120px 0;
    background: #f9fafb;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    margin-bottom: 80px;
}

.value-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.value-card:hover::before {
    transform: scaleX(1);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: #3b82f6;
}

.value-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 24px;
    transition: transform 0.3s ease;
}

.value-card:hover .value-icon {
    transform: scale(1.1);
}

.value-card h3 {
    font-size: 1.5rem;
    color: #1f2937;
    margin-bottom: 16px;
    transition: color 0.3s ease;
}

.value-card:hover h3 {
    color: #1e40af;
}

.value-card p {
    color: #6b7280;
    line-height: 1.6;
    margin: 0;
}

.stats-section {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    border-radius: 24px;
    padding: 60px 40px;
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item {
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: scale(1.1);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, white 0%, rgba(255, 255, 255, 0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
}

/* Process Section */
.process {
    padding: 120px 0;
    background: white;
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto 80px;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, #e5e7eb 0%, #3b82f6 50%, #1e40af 100%);
    transform: translateX(-50%);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 80px;
    position: relative;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-icon {
    position: relative;
    z-index: 10;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.timeline-icon:hover {
    transform: scale(1.1);
}

.step-1 { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); }
.step-2 { background: linear-gradient(135deg, #f97316 0%, #ea580c 100%); }
.step-3 { background: linear-gradient(135deg, #eab308 0%, #ca8a04 100%); }
.step-4 { background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%); }
.step-5 { background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%); }
.step-6 { background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%); }

.step-number {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 32px;
    height: 32px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    color: #1f2937;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.timeline-content {
    flex: 1;
    max-width: 400px;
    margin: 0 40px;
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    border-color: #3b82f6;
}

.timeline-content h3 {
    font-size: 1.5rem;
    color: #1f2937;
    margin-bottom: 16px;
}

.timeline-content p {
    color: #6b7280;
    line-height: 1.6;
    margin: 0;
}

.process-benefits {
    background: linear-gradient(135deg, #f9fafb 0%, #e0f2fe 100%);
    border-radius: 24px;
    padding: 60px 40px;
    text-align: center;
}

.process-benefits h3 {
    font-size: 2rem;
    color: #1f2937;
    margin-bottom: 40px;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.benefit-card {
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.benefit-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.benefit-icon.green { background: rgba(34, 197, 94, 0.1); }
.benefit-icon.blue { background: rgba(59, 130, 246, 0.1); }
.benefit-icon.purple { background: rgba(139, 92, 246, 0.1); }

.icon-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.benefit-icon.green .icon-dot { background: #22c55e; }
.benefit-icon.blue .icon-dot { background: #3b82f6; }
.benefit-icon.purple .icon-dot { background: #8b5cf6; }

.benefit-card h4 {
    font-size: 1.25rem;
    color: #1f2937;
    margin-bottom: 8px;
}

.benefit-card p {
    color: #6b7280;
    font-size: 0.875rem;
    margin: 0;
}

/* CTA Section */
.cta {
    padding: 120px 0;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #3b82f6 100%);
    position: relative;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
    opacity: 0.1;
}

.cta-pattern {
    position: absolute;
    top: 40px;
    left: 40px;
    width: 256px;
    height: 256px;
    background: radial-gradient(circle, white 1px, transparent 1px);
    background-size: 20px 20px;
    border-radius: 50%;
    filter: blur(1px);
}

.cta-pattern::after {
    content: '';
    position: absolute;
    bottom: 40px;
    right: 40px;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 1px, transparent 1px);
    background-size: 30px 30px;
    border-radius: 50%;
    filter: blur(2px);
}

.cta-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 10;
}

.cta-text h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: white;
    margin-bottom: 24px;
    line-height: 1.2;
}

.cta-text p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    line-height: 1.6;
}

.cta-benefits {
    margin-bottom: 40px;
}

.cta-benefit {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.9);
}

.benefit-dot {
    width: 24px;
    height: 24px;
    background: #22c55e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.benefit-dot::after {
    content: '';
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.contact-cards {
    display: grid;
    gap: 24px;
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.3s ease;
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-icon.green { background: #22c55e; }
.contact-icon.blue { background: #3b82f6; }
.contact-icon.purple { background: #8b5cf6; }
.contact-icon.orange { background: #f97316; }

.contact-info h3 {
    color: white;
    font-size: 1.125rem;
    margin-bottom: 4px;
}

.contact-info p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    margin-bottom: 4px;
}

.contact-info span {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
}

/* Footer */
.footer {
    background: #111827;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 24px;
}

.footer-brand .logo-text h3 {
    color: white;
    font-size: 1.25rem;
    margin-bottom: 4px;
}

.footer-brand .logo-text p {
    color: #9ca3af;
    font-size: 0.875rem;
    margin: 0;
}

.footer-description {
    color: #d1d5db;
    line-height: 1.6;
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}

.social-link.facebook { background: #1877f2; }
.social-link.youtube { background: #ff0000; }
.social-link.linkedin { background: #0077b5; }

.social-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.footer-services h4,
.footer-contact h4 {
    color: white;
    font-size: 1.125rem;
    margin-bottom: 24px;
}

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

.footer-services li {
    margin-bottom: 12px;
}

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

.footer-services a:hover {
    color: white;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #d1d5db;
}

.contact-item svg {
    color: #3b82f6;
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    color: #9ca3af;
    font-size: 0.875rem;
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

/* Zalo Floating Button */
.zalo-floating {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.zalo-floating.visible {
    opacity: 1;
    visibility: visible;
}

.zalo-info {
    position: absolute;
    bottom: 80px;
    left: 0;
    width: 320px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    border: 1px solid #e5e7eb;
    padding: 24px;
    transform: translateY(20px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.zalo-info.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.zalo-info-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.zalo-brand h3 {
    color: #1f2937;
    font-size: 1.125rem;
    margin-bottom: 4px;
}

.online-status {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #22c55e;
    font-size: 0.875rem;
    margin: 0;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.close-info {
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: color 0.3s ease;
}

.close-info:hover {
    color: #6b7280;
}

.zalo-message {
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 16px;
}

.zalo-features {
    margin-bottom: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 0.875rem;
    color: #6b7280;
}

.feature-dot {
    width: 8px;
    height: 8px;
    background: #3b82f6;
    border-radius: 50%;
    flex-shrink: 0;
}

.zalo-chat-btn {
    width: 100%;
    background: #3b82f6;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background 0.3s ease;
}

.zalo-chat-btn:hover {
    background: #1e40af;
}

.zalo-btn {
    position: relative;
    width: 56px;
    height: 56px;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
    transition: all 0.3s ease;
    animation: bounce 2s infinite;
}

.zalo-btn:hover {
    background: #1e40af;
    transform: scale(1.1);
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 24px;
    height: 24px;
    background: #ef4444;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    animation: pulse 2s infinite;
}

.ripple-effect {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.3);
    animation: ripple 2s infinite;
}

.zalo-tooltip {
    position: absolute;
    bottom: 70px;
    left: 50%;
    transform: translateX(-50%);
    background: #1f2937;
    color: white;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.875rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}

.zalo-btn:hover + .zalo-tooltip {
    opacity: 1;
    visibility: visible;
}

.tooltip-arrow {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid #1f2937;
}

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

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% { transform: translateY(0); }
    40%, 43% { transform: translateY(-8px); }
    70% { transform: translateY(-4px); }
    90% { transform: translateY(-2px); }
}

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

@keyframes scroll {
    0% { transform: translateY(0); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(8px); opacity: 0; }
}

@keyframes ripple {
    0% { transform: scale(1); opacity: 0.3; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content,
    .cta-content {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .hero-circle {
        width: 300px;
        height: 300px;
    }
    
    .timeline-line {
        display: none;
    }
    
    .timeline-item {
        flex-direction: column !important;
        text-align: center;
    }
    
    .timeline-content {
        margin: 24px 0 0 0;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .desktop-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-nav.active {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }
    
    .hero-benefits {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-visual {
        display: none;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .zalo-info {
        width: 280px;
        left: -200px;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .hero,
    .values,
    .process,
    .cta {
        padding: 80px 0;
    }
    
    .section-header {
        margin-bottom: 60px;
    }
    
    .value-card,
    .timeline-content,
    .contact-card {
        padding: 24px;
    }
    
    .stats-section,
    .process-benefits {
        padding: 40px 24px;
    }
    
    .zalo-floating {
        bottom: 16px;
        left: 16px;
    }
    
    .zalo-info {
        width: calc(100vw - 32px);
        left: 0;
    }
}