:root {
            --primary-color: #ff6b35;
            --secondary-color: #f7931e;
            --accent-color: #2ecc71;
            --dark-color: #2c3e50;
            --light-color: #ecf0f1;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }
        .logo-text {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        .logo-text:hover {
            transform: scale(1.05);
            text-shadow: 3px 3px 6px rgba(0,0,0,0.2);
        }
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        .nav-link {
            font-weight: 600;
            color: var(--dark-color) !important;
            position: relative;
            padding: 8px 15px !important;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            background-color: rgba(255, 107, 53, 0.1);
            color: var(--primary-color) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 15px;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: calc(100% - 30px);
        }
        .hero-section {
            background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(44, 62, 80, 0.9)), url('https://via.placeholder.com/1920x1080') center/cover no-repeat;
            color: white;
            padding: 100px 0;
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 30px;
            color: var(--dark-color);
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        .content-card {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 30px;
            margin-bottom: 30px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
        }
        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.12);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        .game-image {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
            margin-bottom: 20px;
        }
        .game-image:hover {
            transform: scale(1.02);
        }
        .highlight-text {
            background: linear-gradient(120deg, rgba(255, 107, 53, 0.15) 0%, rgba(247, 147, 30, 0.15) 100%);
            border-left: 4px solid var(--primary-color);
            padding: 20px;
            border-radius: 0 8px 8px 0;
            margin: 25px 0;
        }
        .key-feature {
            display: flex;
            align-items: flex-start;
            margin-bottom: 20px;
        }
        .key-feature i {
            color: var(--accent-color);
            font-size: 1.5rem;
            margin-right: 15px;
            margin-top: 5px;
            flex-shrink: 0;
        }
        footer {
            background: var(--dark-color);
            color: white;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            transition: all 0.3s ease;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            transform: translateY(-3px);
        }
        .table-of-contents {
            background: white;
            border-radius: 10px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 30px;
            position: sticky;
            top: 20px;
        }
        .toc-title {
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--dark-color);
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 10px;
        }
        .toc-list {
            list-style-type: none;
            padding-left: 0;
        }
        .toc-list li {
            margin-bottom: 10px;
            padding-left: 15px;
            position: relative;
        }
        .toc-list li::before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--primary-color);
        }
        .toc-list a {
            color: var(--dark-color);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        .toc-list a:hover {
            color: var(--primary-color);
        }
        @media (max-width: 768px) {
            .logo-text {
                font-size: 1.8rem;
            }
            .hero-section {
                padding: 60px 0;
            }
            .content-card {
                padding: 20px;
            }
        }