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

:root {
    --color-primary: #FF6B35;
    --color-secondary: #F7931E;
    --color-accent: #00B4D8;
    --color-dark: #1a1a2e;
    --color-darker: #0f0f1e;
    --color-light: #ffffff;
    --color-gray: #6c757d;
    --color-gray-light: #f8f9fa;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-dark);
    background: var(--color-light);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.header {
    background: var(--color-darker);
    padding: var(--spacing-sm) 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-light);
    text-decoration: none;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav a {
    color: var(--color-light);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
}

.nav a:hover {
    color: var(--color-primary);
    background: rgba(255, 107, 53, 0.1);
}

.hero {
    margin-top: 72px;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-darker) 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 107, 53, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0, 180, 216, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(247, 147, 30, 0.1) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    color: var(--color-light);
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-light);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--color-light);
    border: 2px solid var(--color-light);
}

.btn-secondary:hover {
    background: var(--color-light);
    color: var(--color-dark);
    transform: translateY(-3px);
}

.btn-large {
    padding: 1.2rem 3rem;
    font-size: 1.2rem;
}

.features {
    padding: var(--spacing-xl) 0;
    background: var(--color-gray-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--color-light);
    padding: var(--spacing-lg);
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.feature-card p {
    color: var(--color-gray);
    font-size: 1rem;
}

.content-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-light);
}

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

.article h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--color-dark);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-content h3 {
    font-size: 1.8rem;
    color: var(--color-dark);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.article-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #333;
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

.article-content strong {
    color: var(--color-primary);
    font-weight: 700;
}

.article-content ul {
    list-style: none;
    margin: var(--spacing-md) 0;
    padding-left: 0;
}

.article-content ul li {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    background: var(--color-gray-light);
    border-left: 4px solid var(--color-primary);
    border-radius: 8px;
    font-size: 1.05rem;
}

.article-content ul li strong {
    display: block;
    margin-bottom: 0.3rem;
}

.cta-section {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-darker) 100%);
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 30% 50%, rgba(255, 107, 53, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(0, 180, 216, 0.15) 0%, transparent 50%);
}

.cta-section .container {
    position: relative;
    z-index: 2;
}

.cta-section h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--color-light);
    margin-bottom: var(--spacing-sm);
}

.cta-section p {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

.footer {
    background: var(--color-darker);
    color: var(--color-light);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-section h4 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.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: var(--spacing-xs);
}

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

.footer-section ul li a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .nav {
        gap: var(--spacing-sm);
    }

    .nav a {
        padding: var(--spacing-xs);
        font-size: 0.9rem;
    }

    .hero {
        min-height: 500px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .article-content p {
        text-align: left;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .logo span {
        font-size: 1.2rem;
    }

    .nav {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .nav a {
        font-size: 0.85rem;
    }
}