:root {
            --primary-color: #ff6b35;
            --secondary-color: #004e64;
            --accent-color: #00a5cf;
            --text-dark: #2e2e2e;
            --text-light: #f7f7f7;
            --background-light: #fffaf0;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--background-light);
        }
        .logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            letter-spacing: 1px;
        }
        .nav-custom {
            background: linear-gradient(135deg, var(--secondary-color), #1a535c);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .nav-link {
            color: var(--text-light) !important;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 10px 15px !important;
        }
        .nav-link:hover {
            color: var(--accent-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(0,78,100,0.8), rgba(255,107,53,0.7)), url('https://via.placeholder.com/1600x900') center/cover no-repeat;
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        .section-title {
            color: var(--secondary-color);
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 10px;
            margin-bottom: 30px;
            position: relative;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 100px;
            height: 3px;
            background-color: var(--accent-color);
        }
        .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-left: 5px solid var(--primary-color);
        }
        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.12);
        }
        .key-point {
            background-color: #e8f4f8;
            border-left: 4px solid var(--accent-color);
            padding: 15px 20px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        .game-feature {
            background: linear-gradient(135deg, #fff, #f0f8ff);
            border-radius: 10px;
            padding: 20px;
            margin: 15px 0;
            border: 1px solid #e1e5e9;
        }
        .highlight {
            color: var(--primary-color);
            font-weight: bold;
        }
        .img-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            margin: 25px 0;
            transition: transform 0.4s ease;
        }
        .img-container:hover {
            transform: scale(1.02);
        }
        footer {
            background: linear-gradient(135deg, var(--secondary-color), #1a535c);
            color: var(--text-light);
            padding: 40px 0 20px;
        }
        .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: 20px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            background: var(--accent-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .logo {
                font-size: 1.8rem;
            }
            .hero-section {
                padding: 60px 0;
            }
            .content-card {
                padding: 20px;
            }
        }