:root {
            --primary-gold: #FFD700;
            --secondary-purple: #8A2BE2;
            --accent-green: #32CD32;
            --dark-bg: #1a1a2e;
            --content-bg: #16213e;
            --text-light: #e6e6e6;
        }
        body {
            background: linear-gradient(135deg, var(--dark-bg) 0%, var(--content-bg) 100%);
            color: var(--text-light);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
        }
        .logo-brand {
            font-family: 'Georgia', serif;
            font-weight: bold;
            font-size: 2.2rem;
            background: linear-gradient(45deg, var(--primary-gold), var(--accent-green));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .nav-custom {
            background-color: rgba(26, 26, 46, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid var(--primary-gold);
        }
        .nav-link {
            color: var(--text-light) !important;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary-gold) !important;
            transform: translateY(-2px);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--primary-gold);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://via.placeholder.com/1200x600') center/cover no-repeat;
            padding: 100px 0;
            text-align: center;
            margin-bottom: 40px;
        }
        h1 {
            color: var(--primary-gold);
            font-size: 3rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        h2 {
            color: var(--accent-green);
            border-left: 4px solid var(--secondary-purple);
            padding-left: 15px;
            margin: 40px 0 20px;
        }
        h3 {
            color: var(--primary-gold);
            margin: 30px 0 15px;
        }
        .content-card {
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 30px;
            border: 1px solid rgba(255, 215, 0, 0.2);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .key-term {
            color: var(--primary-gold);
            font-weight: bold;
        }
        .feature-list {
            list-style-type: none;
            padding-left: 0;
        }
        .feature-list li {
            padding: 8px 0;
            padding-left: 30px;
            position: relative;
        }
        .feature-list li:before {
            content: '?';
            position: absolute;
            left: 0;
        }
        .img-container {
            border-radius: 10px;
            overflow: hidden;
            margin: 25px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        .img-container img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .img-container:hover img {
            transform: scale(1.03);
        }
        .highlight-box {
            background: linear-gradient(135deg, rgba(255,215,0,0.1) 0%, rgba(138,43,226,0.1) 100%);
            border-left: 4px solid var(--primary-gold);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary-gold);
            display: block;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--text-light);
        }
        footer {
            background-color: rgba(0, 0, 0, 0.8);
            padding: 40px 0 20px;
            margin-top: 60px;
            border-top: 2px solid var(--primary-gold);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: var(--secondary-purple);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            text-decoration: none;
            opacity: 0;
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top.visible {
            opacity: 1;
        }
        .back-to-top:hover {
            background-color: var(--primary-gold);
            color: var(--dark-bg);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            .hero-section {
                padding: 60px 0;
            }
            .logo-brand {
                font-size: 1.8rem;
            }
        }