* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066cc;
    --primary-dark: #004a99;
    --secondary-color: #00ccff;
    --accent-color: #ff6600;
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #999;
    --bg-light: #f5f7fa;
    --bg-dark: #0a1628;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-light);
    overflow-x: hidden;
    font-size: 16px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    backdrop-filter: blur(0);
    box-shadow: none;
    transition: all 0.4s ease;
}

.header:hover,
.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.company-name {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    transition: color 0.3s ease;
}

.company-slogan {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s ease;
}

.header:hover .company-name,
.header.scrolled .company-name {
    color: var(--text-primary);
}

.header:hover .company-slogan,
.header.scrolled .company-slogan {
    color: var(--text-light);
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav a {
    text-decoration: none;
    color: #fff;
    font-weight: 500;
    font-size: 16px;
    transition: color 0.3s ease;
    position: relative;
}

.nav a:hover {
    color: var(--secondary-color);
}

.header:hover .nav a,
.header.scrolled .nav a,
.nav.active a {
    color: var(--text-primary);
}

.header:hover .nav a:hover,
.header.scrolled .nav a:hover,
.nav.active a:hover {
    color: var(--primary-color);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    width: 30px;
    height: 3px;
    background: #fff;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.header:hover .menu-toggle span,
.header.scrolled .menu-toggle span {
    background: var(--text-primary);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(9px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-9px);
}

.hero {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100vh;
    z-index: 0;
}

.hero-content {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 28%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 50px;
    z-index: 2;
    color: #fff;
    background: linear-gradient(to right, rgba(0, 102, 204, 0.98) 0%, rgba(0, 74, 153, 0.95) 85%, rgba(0, 74, 153, 0) 100%);
}

.hero-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
    color: #fff;
}

.hero-subtitle {
    font-size: 18px;
    font-weight: 300;
    margin-bottom: 40px;
    opacity: 0.95;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.95);
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    justify-content: flex-start;
}

.slider-item {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.slider-item.active {
    opacity: 1;
}

.slider-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
}

.slider-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2);
}

.slider-content {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    text-align: center;
}

.slider-content h2 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 10px;
}

.slider-content p {
    font-size: 16px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

.btn-full {
    width: 100%;
    text-align: center;
}

.slider-controls {
    position: absolute;
    bottom: 40px;
    right: 40px;
    display: flex;
    align-items: center;
    gap: 20px;
    z-index: 3;
}

.prev-btn, .next-btn {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.prev-btn:hover, .next-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.slider-dots {
    display: flex;
    gap: 12px;
}

.dot {
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background: #fff;
    width: 30px;
    border-radius: 6px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: bounce 2s infinite;
    z-index: 3;
    font-size: 14px;
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 2px;
    animation: scrollDown 1.5s infinite;
}

@keyframes scrollDown {
    0% { transform: translateX(-50%) translateY(0); opacity: 1; }
    100% { transform: translateX(-50%) translateY(10px); opacity: 0; }
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

.traditional-business {
    padding: 120px 0;
    background: var(--card-bg);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
}

.business-card {
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.card-image {
    height: 200px;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.business-card:hover .card-image img {
    transform: scale(1.1);
}

.business-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin: 25px 0 15px;
    color: var(--text-primary);
}

.business-card p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    padding: 0 25px 30px;
}

.advanced-business {
    padding: 120px 0;
    background: var(--bg-dark);
}

.advanced-business .section-title {
    color: #fff;
}

.advanced-business .section-desc {
    color: rgba(255, 255, 255, 0.6);
}

.advanced-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 35px;
}

.advanced-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.advanced-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.advanced-card.featured {
    grid-column: span 2;
}

.card-image {
    height: 280px;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.advanced-card:hover .card-image img {
    transform: scale(1.1);
}

.card-content {
    padding: 35px;
}

.card-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--accent-color);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 20px;
}

.card-content h3 {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.card-content p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 25px;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.card-tags li {
    list-style: none;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
}

.video-showcase {
    padding: 120px 0;
    background: var(--card-bg);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.video-item {
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.video-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.video-item video {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.video-caption {
    padding: 20px;
    text-align: center;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.about {
    padding: 120px 0;
    background: var(--card-bg);
}

.about-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 80px;
    align-items: center;
}

.about-text p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 25px;
}

.about-stats {
    display: flex;
    gap: 50px;
    margin-top: 40px;
}

.about-stat {
    text-align: center;
}

.about-stat .number {
    display: block;
    font-size: 52px;
    font-weight: 700;
    color: var(--primary-color);
}

.about-stat .label {
    font-size: 16px;
    color: var(--text-secondary);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.partners {
    margin-top: 100px;
    text-align: center;
}

.partners h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.partner-logos {
    display: flex;
    justify-content: center;
    gap: 80px;
}

.partner-item {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-secondary);
    padding: 25px 50px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.partner-item:hover {
    background: var(--primary-color);
    color: #fff;
}

.development-strategy {
    padding: 120px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--bg-dark) 100%);
}

.development-strategy .section-title {
    color: #fff;
}

.development-strategy .section-desc {
    color: rgba(255, 255, 255, 0.6);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 70px;
    display: flex;
}

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

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

.timeline-date {
    width: 220px;
    flex-shrink: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--secondary-color);
    padding-right: 50px;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-date {
    padding-left: 50px;
    padding-right: 0;
    text-align: left;
}

.timeline-content {
    flex: 1;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-content h4 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.timeline-content p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.9;
}

.contact {
    padding: 120px 0;
    background: var(--card-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 80px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.info-item {
    display: flex;
    gap: 25px;
}

.info-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 28px;
    flex-shrink: 0;
}

.info-content h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.info-content p {
    font-size: 16px;
    color: var(--text-secondary);
}

.contact-form {
    background: var(--bg-light);
    padding: 50px;
    border-radius: 20px;
}

.form-group {
    margin-bottom: 30px;
}

.form-group label {
    display: block;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--card-bg);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-success {
    text-align: center;
    padding: 80px 20px;
}

.form-success.hidden {
    display: none;
}

.success-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 25px;
    background: #00cc66;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 50px;
}

.form-success h4 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.form-success p {
    font-size: 16px;
    color: var(--text-secondary);
}

.footer {
    background: var(--bg-dark);
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 50px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 25px;
}

.footer-logo img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.footer-logo span {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
}

.footer-about p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.9;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 25px;
    color: #fff;
}

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

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    text-decoration: none;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.footer-contact p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 12px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.footer-cert {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-cert a {
    color: rgba(255, 255, 255, 0.4);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-cert a:hover {
    color: var(--secondary-color);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 1200px) {
    .hero-title {
        font-size: 48px;
    }
    
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advanced-grid {
        grid-template-columns: 1fr;
    }
    
    .advanced-card.featured {
        grid-column: span 1;
    }
    
    .about-content {
        gap: 50px;
    }
    
    .partner-logos {
        gap: 50px;
    }
}

@media (max-width: 768px) {
    .video-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .video-item video {
        height: 180px;
    }
    
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        box-shadow: var(--shadow-md);
        padding: 25px;
    }
    
    .nav.active {
        display: block;
    }
    
    .nav ul {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav a {
        font-size: 18px;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .logo img {
        width: 50px;
        height: 50px;
    }
    
    .company-name {
        font-size: 15px;
    }
    
    .company-slogan {
        font-size: 11px;
    }
    
    .hero {
        flex-direction: column;
        min-height: auto;
    }
    
    .hero-slider {
        position: relative;
        width: 100%;
        height: 60vh;
    }
    
    .hero-content {
        position: relative;
        width: 100%;
        padding: 40px 30px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .slider-controls {
        right: 20px;
        bottom: 20px;
    }
    
    .scroll-indicator {
        left: 50%;
        bottom: 20px;
    }
    
    .slider-content h2 {
        font-size: 24px;
    }
    
    .slider-content p {
        font-size: 14px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .section-desc {
        font-size: 16px;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-stats {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .partner-logos {
        flex-direction: column;
        gap: 25px;
    }
    
    .timeline::before {
        left: 25px;
    }
    
    .timeline-item {
        flex-direction: column !important;
        padding-left: 60px;
    }
    
    .timeline-date {
        width: auto;
        padding-right: 0 !important;
        padding-left: 0 !important;
        text-align: left !important;
        margin-bottom: 20px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 30px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .btn {
        padding: 12px 30px;
        font-size: 16px;
    }
    
    .business-card h3 {
        font-size: 20px;
    }
    
    .business-card p {
        font-size: 14px;
    }
    
    .about-stat .number {
        font-size: 40px;
    }
    
    .contact-form {
        padding: 30px;
    }
}