:root {
            --primary-color: #FF6B6B;
            --secondary-color: #4ECDC4;
            --accent-color: #FFE66D;
            --dark-color: #1A535C;
            --light-color: #F7FFF7;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 83, 92, 0.8), rgba(255, 107, 107, 0.7)), url('https://via.placeholder.com/1600x900') center/cover no-repeat;
            color: white;
            padding: 100px 0;
            text-align: center;
            margin-bottom: 40px;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            padding: 40px;
            margin-bottom: 30px;
        }
        h1, h2, h3 {
            color: var(--dark-color);
            margin-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--primary-color);
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-top: 2rem;
        }
        .highlight {
            background-color: var(--accent-color);
            padding: 20px;
            border-radius: 10px;
            margin: 25px 0;
            border-left: 5px solid var(--primary-color);
        }
        .key-point {
            font-weight: 700;
            color: var(--primary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin: 25px 0;
            transition: transform 0.3s ease;
        }
        img:hover {
            transform: scale(1.02);
        }
        .nav-link {
            color: var(--dark-color);
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            color: var(--primary-color);
            transform: translateX(5px);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 0;
            margin-top: 50px;
        }
        .game-feature {
            background: linear-gradient(135deg, var(--light-color), #e0f7fa);
            padding: 20px;
            border-radius: 10px;
            margin: 15px 0;
            transition: all 0.3s ease;
        }
        .game-feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .cultural-note {
            border: 2px dashed var(--secondary-color);
            padding: 20px;
            border-radius: 10px;
            margin: 20px 0;
            background-color: rgba(78, 205, 196, 0.1);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .hero-section {
                padding: 60px 0;
            }
            .content-section {
                padding: 25px;
            }
        }