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

:root {
    --primary-color: #00D9FF;
    --secondary-color: #FF6B35;
    --accent-color: #F7931E;
    --success-color: #00A86B;
    --text-dark: #1a1a1a;
    --text-light: #ffffff;
    --text-gray: #666666;
    --bg-light: #f8f9fa;
    --bg-dark: #2c3e50;
    --spacing-unit: 8px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

.header {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #34495e 100%);
    padding: calc(var(--spacing-unit) * 3) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    font-size: 24px;
    font-weight: 700;
    color: var(--text-light);
}

.nav {
    display: flex;
    gap: calc(var(--spacing-unit) * 4);
}

.nav a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    border-radius: 8px;
}

.nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0099cc 100%);
    padding: calc(var(--spacing-unit) * 15) 0 calc(var(--spacing-unit) * 12);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 600px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    color: var(--text-light);
    margin-bottom: calc(var(--spacing-unit) * 3);
    line-height: 1.2;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: calc(var(--spacing-unit) * 5);
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    background: var(--secondary-color);
    color: var(--text-light);
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 6);
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(255, 107, 53, 0.5);
    background: #ff5722;
}

.hero-visual {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

.tv-screen {
    width: 320px;
    height: 200px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.05) 100%);
    border-radius: 20px;
    padding: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.screen-content {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0.3) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-icon {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
    }
}

.content-section {
    padding: calc(var(--spacing-unit) * 12) 0;
    background: var(--text-light);
}

.main-article {
    max-width: 900px;
    margin: 0 auto;
}

.main-article h2 {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: calc(var(--spacing-unit) * 6);
    text-align: center;
    line-height: 1.3;
}

.article-intro {
    background: linear-gradient(135deg, var(--bg-light) 0%, #e8eef2 100%);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: 16px;
    margin-bottom: calc(var(--spacing-unit) * 6);
    border-left: 5px solid var(--primary-color);
}

.article-intro p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-dark);
}

.article-section {
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.article-section h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: calc(var(--spacing-unit) * 3);
    line-height: 1.3;
    position: relative;
    padding-bottom: calc(var(--spacing-unit) * 2);
}

.article-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--accent-color) 100%);
    border-radius: 2px;
}

.article-section p {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.article-section p strong {
    color: var(--text-dark);
    font-weight: 600;
}

.services-section {
    padding: calc(var(--spacing-unit) * 12) 0;
    background: linear-gradient(135deg, var(--bg-light) 0%, #e3e9ed 100%);
}

.services-section h2 {
    font-size: 42px;
    font-weight: 800;
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 8);
    color: var(--text-dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: calc(var(--spacing-unit) * 4);
}

.service-card {
    background: var(--text-light);
    padding: calc(var(--spacing-unit) * 5);
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.service-icon {
    margin-bottom: calc(var(--spacing-unit) * 3);
    display: inline-block;
}

.service-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--text-dark);
}

.service-card p {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.6;
}

.features-section {
    padding: calc(var(--spacing-unit) * 12) 0;
    background: var(--text-light);
}

.features-section h2 {
    font-size: 42px;
    font-weight: 800;
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 8);
    color: var(--text-dark);
}

.features-list {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: calc(var(--spacing-unit) * 4);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 4);
    background: var(--bg-light);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(8px);
    background: linear-gradient(135deg, #f0f5f9 0%, #e3e9ed 100%);
}

.feature-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    min-width: 80px;
    opacity: 0.3;
}

.feature-content h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 1);
    color: var(--text-dark);
}

.feature-content p {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.6;
}

.contact-section {
    padding: calc(var(--spacing-unit) * 12) 0;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a252f 100%);
}

.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-content h2 {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-light);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.contact-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: calc(var(--spacing-unit) * 6);
    line-height: 1.8;
}

.contact-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 6);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    color: var(--text-light);
    font-size: 18px;
    font-weight: 500;
}

.footer {
    background: #1a1a1a;
    color: var(--text-light);
    padding: calc(var(--spacing-unit) * 8) 0 calc(var(--spacing-unit) * 4);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 6);
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.footer-section h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 3);
    color: var(--primary-color);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

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

.footer-section ul li {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    padding-left: calc(var(--spacing-unit) * 1);
}

.footer-bottom {
    text-align: center;
    padding-top: calc(var(--spacing-unit) * 4);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-visual {
        display: none;
    }

    .main-article h2,
    .services-section h2,
    .features-section h2,
    .contact-content h2 {
        font-size: 32px;
    }

    .article-section h3 {
        font-size: 24px;
    }

    .nav {
        gap: calc(var(--spacing-unit) * 2);
    }

    .nav a {
        font-size: 14px;
        padding: calc(var(--spacing-unit) * 1);
    }

    .logo {
        font-size: 20px;
    }

    .logo svg {
        width: 40px;
        height: 40px;
    }

    .feature-item {
        flex-direction: column;
        text-align: center;
    }

    .feature-number {
        min-width: auto;
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: calc(var(--spacing-unit) * 8) 0;
        min-height: 400px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .cta-button {
        padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
        font-size: 16px;
    }

    .main-article h2,
    .services-section h2,
    .features-section h2,
    .contact-content h2 {
        font-size: 28px;
    }

    .article-section h3 {
        font-size: 22px;
    }

    .article-section p,
    .article-intro p {
        font-size: 16px;
    }
}