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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #1a1a2e;
    background: #f0f2f5;
    transition: background 0.3s, color 0.3s;
}

body.dark-mode {
    background: #0f0f1a;
    color: #e0e0e0;
}

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

/* Header */
header {
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
    color: white;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: white;
    font-size: 1.6em;
    font-weight: 700;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 25px;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 25px;
    font-size: 0.95em;
    transition: all 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: #ff9800;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 70%;
}

.nav-menu a.active,
.nav-menu a:hover {
    background: rgba(255, 255, 255, 0.15);
}

.nav-actions {
    display: flex;
    gap: 12px;
}

.nav-actions button {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-actions button:hover {
    background: rgba(255, 255, 255, 0.25);
}

.search-bar {
    display: none;
    padding: 15px 30px;
    background: rgba(13, 71, 161, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.search-bar input {
    width: 85%;
    padding: 12px 20px;
    border: none;
    border-radius: 30px;
    font-size: 1em;
    background: rgba(255, 255, 255, 0.9);
}

.search-bar button {
    padding: 12px 25px;
    background: linear-gradient(135deg, #ff9800, #f57c00);
    border: none;
    color: white;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.3s;
}

.search-bar button:hover {
    transform: scale(1.05);
}

.breadcrumb {
    padding: 12px 30px;
    background: rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    gap: 10px;
    font-size: 0.9em;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: white;
}

/* Banner */
.hero-banner {
    position: relative;
    overflow: hidden;
    height: 600px;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    background-size: cover;
    background-position: center;
}

.slide.active {
    display: flex;
    animation: slideIn 0.8s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: scale(1.1);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.slide-content {
    padding: 40px;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    max-width: 800px;
    margin: 0 20px;
}

.slide h1,
.slide h2 {
    font-size: 2.8em;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.slide p {
    font-size: 1.2em;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn-primary {
    display: inline-block;
    padding: 16px 40px;
    background: linear-gradient(135deg, #ff9800, #f57c00);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1.1em;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 152, 0, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 152, 0, 0.6);
}

.banner-nav {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
}

.dot {
    width: 14px;
    height: 14px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.dot.active {
    background: white;
    border-color: #ff9800;
    transform: scale(1.2);
}

.dot:hover {
    background: rgba(255, 255, 255, 0.8);
}

/* Sections */
section {
    padding: 80px 0;
}

h2 {
    font-size: 2.2em;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #1a73e8, #ff9800);
    border-radius: 3px;
}

/* About Section */
.about-section {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
}

body.dark-mode .about-section {
    background: linear-gradient(135deg, #1a237e, #0d47a1);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.about-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

body.dark-mode .about-card {
    background: rgba(30, 30, 30, 0.7);
    border-color: rgba(255, 255, 255, 0.1);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* Products Section */
.products-section {
    background: white;
}

body.dark-mode .products-section {
    background: #1a1a2e;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

body.dark-mode .product-card {
    background: linear-gradient(135deg, #2c2c3e, #1a1a2e);
}

.product-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.4s;
}

.product-card:hover::before {
    opacity: 1;
}

.product-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}

.product-card svg {
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

/* Services Section */
.services-section {
    background: linear-gradient(135deg, #fce4ec, #f8bbd0);
}

body.dark-mode .services-section {
    background: linear-gradient(135deg, #4a148c, #7b1fa2);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

body.dark-mode .service-card {
    background: rgba(30, 30, 30, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* Cases Section */
.cases-section {
    background: #f5f5f5;
}

body.dark-mode .cases-section {
    background: #1a1a2e;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.case-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

body.dark-mode .case-card {
    background: #2c2c3e;
}

.case-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #1a73e8, #ff9800);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.case-card:hover::after {
    transform: scaleX(1);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}

/* Data Section */
.data-section {
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
    color: white;
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.data-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s;
}

.data-item:hover {
    transform: scale(1.05);
}

.number {
    font-size: 3em;
    font-weight: 700;
    color: #ff9800;
    display: block;
    margin-bottom: 10px;
}

/* FAQ Section */
.faq-section {
    background: #e8eaf6;
}

body.dark-mode .faq-section {
    background: #1a237e;
}

.faq-item {
    margin-bottom: 15px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.faq-question {
    width: 100%;
    padding: 20px 25px;
    background: white;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 600;
    border-radius: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

body.dark-mode .faq-question {
    background: #2c2c3e;
    color: white;
}

.faq-question:hover {
    background: #f5f5f5;
}

body.dark-mode .faq-question:hover {
    background: #3c3c4e;
}

.arrow {
    transition: transform 0.3s;
}

.faq-answer {
    display: none;
    padding: 20px 25px;
    background: #fafafa;
    border-top: 1px solid #e0e0e0;
}

body.dark-mode .faq-answer {
    background: #1e1e2e;
    border-color: #333;
}

/* Testimonials */
.testimonials-section {
    background: linear-gradient(135deg, #e0f7fa, #b2ebf2);
}

body.dark-mode .testimonials-section {
    background: linear-gradient(135deg, #006064, #00838f);
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.4s;
}

body.dark-mode .testimonial-card {
    background: rgba(30, 30, 30, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
}

.testimonial-card:hover {
    transform: translateX(10px);
}

/* Culture Section */
.culture-section ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.culture-section li {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.3s;
}

body.dark-mode .culture-section li {
    background: rgba(30, 30, 30, 0.7);
    border-color: rgba(255, 255, 255, 0.1);
}

.culture-section li:hover {
    transform: translateY(-5px);
}

/* Advantages Section */
.advantages-section ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.advantages-section li {
    background: white;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
}

body.dark-mode .advantages-section li {
    background: #2c2c3e;
}

.advantages-section li::before {
    content: '✓';
    color: #4caf50;
    font-weight: bold;
    margin-right: 8px;
}

.advantages-section li:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Solutions Section */
.solutions-section {
    background: linear-gradient(135deg, #f3e5f5, #e1bee7);
}

body.dark-mode .solutions-section {
    background: linear-gradient(135deg, #4a148c, #6a1b9a);
}

/* Scenarios Section */
.scenarios-section ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.scenarios-section li {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.3s;
}

body.dark-mode .scenarios-section li {
    background: rgba(30, 30, 30, 0.7);
    border-color: rgba(255, 255, 255, 0.1);
}

.scenarios-section li:hover {
    transform: translateX(5px);
}

/* Clients Section */
.clients-section {
    background: #f5f5f5;
}

body.dark-mode .clients-section {
    background: #1a1a2e;
}

.client-logos {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.client-logos svg {
    transition: all 0.3s;
    filter: grayscale(100%);
    opacity: 0.7;
}

.client-logos svg:hover {
    filter: grayscale(0);
    opacity: 1;
    transform: scale(1.1);
}

/* News Section */
.news-section {
    background: #fff3e0;
}

body.dark-mode .news-section {
    background: #1a1a2e;
}

.news-item {
    background: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

body.dark-mode .news-item {
    background: #2c2c3e;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.news-item time {
    color: #666;
    font-size: 0.9em;
}

body.dark-mode .news-item time {
    color: #aaa;
}

/* Articles Section */
.articles-section ul {
    list-style: none;
}

.articles-section li {
    margin-bottom: 15px;
}

.articles-section a {
    color: #1a73e8;
    text-decoration: none;
    font-size: 1.1em;
    transition: color 0.3s;
    position: relative;
    padding-left: 20px;
}

.articles-section a::before {
    content: '→';
    position: absolute;
    left: 0;
    transition: transform 0.3s;
}

.articles-section a:hover {
    color: #ff9800;
}

.articles-section a:hover::before {
    transform: translateX(5px);
}

body.dark-mode .articles-section a {
    color: #90caf9;
}

/* Contact Section */
.contact-section {
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
}

body.dark-mode .contact-section {
    background: linear-gradient(135deg, #1b5e20, #2e7d32);
}

.contact-section p {
    font-size: 1.1em;
    margin-bottom: 15px;
    text-align: center;
}

/* Sitemap & Links */
.sitemap-section ul,
.links-section ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.sitemap-section a,
.links-section a {
    color: #1a73e8;
    text-decoration: none;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 25px;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

body.dark-mode .sitemap-section a,
body.dark-mode .links-section a {
    background: rgba(30, 30, 30, 0.7);
    border-color: rgba(255, 255, 255, 0.1);
    color: #90caf9;
}

.sitemap-section a:hover,
.links-section a:hover {
    background: #1a73e8;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.4);
}

body.dark-mode .sitemap-section a:hover,
body.dark-mode .links-section a:hover {
    background: #1565c0;
    color: white;
}

/* EEAT Section */
.eeat-section {
    background: #fafafa;
    border-top: 1px solid #e0e0e0;
}

body.dark-mode .eeat-section {
    background: #1a1a2e;
    border-color: #333;
}

.eeat-section p {
    margin-bottom: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

body.dark-mode .eeat-section p {
    border-color: #333;
}

.eeat-section strong {
    color: #1a73e8;
}

body.dark-mode .eeat-section strong {
    color: #90caf9;
}

/* HowTo Section */
.howto-section ol {
    max-width: 600px;
    margin: 0 auto;
    padding-left: 30px;
}

.howto-section li {
    margin-bottom: 15px;
    font-size: 1.1em;
    padding: 15px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

body.dark-mode .howto-section li {
    background: rgba(30, 30, 30, 0.7);
    border-color: rgba(255, 255, 255, 0.1);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
    color: white;
    border: none;
    padding: 15px;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.4);
    transition: all 0.3s;
}

.back-to-top:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.6);
}

/* Footer */
footer {
    background: linear-gradient(135deg, #0d47a1, #1a237e);
    color: white;
    text-align: center;
    padding: 30px;
}

body.dark-mode footer {
    background: linear-gradient(135deg, #000, #0d47a1);
}

footer a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: #ff9800;
}

/* Responsive */
.menu-toggle {
    display: none;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(13, 71, 161, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        padding: 20px;
        gap: 15px;
    }

    .nav-menu.open {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero-banner {
        height: 400px;
    }

    .slide h1,
    .slide h2 {
        font-size: 1.8em;
    }

    .slide p {
        font-size: 1em;
    }

    .slide-content {
        padding: 20px;
    }

    h2 {
        font-size: 1.8em;
    }

    .about-grid,
    .product-grid,
    .service-grid,
    .case-grid,
    .data-grid {
        grid-template-columns: 1fr;
    }

    .search-bar input {
        width: 70%;
    }

    .breadcrumb {
        padding: 10px 20px;
        font-size: 0.85em;
    }
}

@media (max-width: 480px) {
    .hero-banner {
        height: 300px;
    }

    .slide h1,
    .slide h2 {
        font-size: 1.4em;
    }

    .btn-primary {
        padding: 12px 30px;
        font-size: 1em;
    }

    .nav-container {
        padding: 10px 15px;
    }

    .logo {
        font-size: 1.2em;
    }

    .number {
        font-size: 2em;
    }
}

/* Animations */
.visible {
    animation: fadeInUp 0.6s ease forwards;
}

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

.product-card,
.service-card,
.case-card,
.testimonial-card,
.about-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.product-card.visible,
.service-card.visible,
.case-card.visible,
.testimonial-card.visible,
.about-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Dark mode specific overrides */
body.dark-mode .slide-content {
    background: rgba(0, 0, 0, 0.5);
}

body.dark-mode .faq-question {
    background: #2c2c3e;
    color: #e0e0e0;
}

body.dark-mode .faq-answer {
    background: #1e1e2e;
    color: #ccc;
}

body.dark-mode .news-item {
    background: #2c2c3e;
    color: #e0e0e0;
}

body.dark-mode .articles-section a {
    color: #90caf9;
}
```