:root {
            --primary-color: #ff6b35;
            --secondary-color: #1a1a2e;
            --accent-color: #f7931e;
            --text-light: #ffffff;
            --text-dark: #333333;
            --bg-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #f8f9fa;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .hero-section {
            background: var(--bg-gradient);
            color: var(--text-light);
            padding: 4rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 20px 20px;
        }
        .game-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            text-shadow: 0 4px 8px rgba(0,0,0,0.4);
        }
        .section-title {
            color: var(--secondary-color);
            border-left: 5px solid var(--primary-color);
            padding-left: 15px;
            margin: 2.5rem 0 1.5rem;
            font-weight: 700;
        }
        .content-card {
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            padding: 2rem;
            margin-bottom: 2rem;
            transition: transform 0.3s ease;
        }
        .content-card:hover {
            transform: translateY(-5px);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .img-container {
            border-radius: 12px;
            overflow: hidden;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .highlight-text {
            background: linear-gradient(120deg, #ff6b35 0%, #f7931e 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 700;
        }
        .key-point {
            background-color: rgba(255, 107, 53, 0.1);
            border-left: 4px solid var(--primary-color);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .table-of-contents {
            background-color: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            margin-bottom: 2rem;
        }
        .toc-item {
            padding: 0.5rem 0;
            border-bottom: 1px solid #eee;
        }
        .toc-item:last-child {
            border-bottom: none;
        }
        footer {
            background: var(--secondary-color);
            color: var(--text-light);
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .copyright {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            margin-top: 2rem;
            text-align: center;
        }
        @media (max-width: 768px) {
            .game-title {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 2.5rem 0;
            }
            .content-card {
                padding: 1.5rem;
            }
        }