:root {
            --primary-color: #2E8B57;
            --secondary-color: #FFD700;
            --accent-color: #FF6B35;
            --text-color: #2C3E50;
            --light-bg: #F8F9FA;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            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(--accent-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(46, 139, 87, 0.9), rgba(255, 107, 53, 0.8)), url('https://via.placeholder.com/1200x600') center/cover;
            color: white;
            padding: 100px 0;
            text-align: center;
            border-radius: 0 0 30px 30px;
            margin-bottom: 40px;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            padding: 40px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 25px;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        h2 {
            border-left: 5px solid var(--secondary-color);
            padding-left: 15px;
            margin-top: 40px;
        }
        .keyword-highlight {
            background: linear-gradient(120deg, var(--secondary-color) 0%, var(--secondary-color) 100%);
            background-repeat: no-repeat;
            background-size: 100% 0.3em;
            background-position: 0 88%;
            font-weight: 700;
            padding: 0.1em 0;
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .strategy-card {
            border: none;
            border-radius: 15px;
            transition: all 0.3s ease;
            margin-bottom: 25px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .strategy-card:hover {
            transform: scale(1.03);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .game-image {
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
            margin: 30px 0;
            transition: transform 0.3s ease;
        }
        .game-image:hover {
            transform: scale(1.02);
        }
        .nav-pills .nav-link.active {
            background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
            border: none;
            font-weight: 600;
        }
        .nav-pills .nav-link {
            color: var(--text-color);
            font-weight: 500;
            margin: 5px 0;
            border-radius: 10px;
        }
        footer {
            background: var(--text-color);
            color: white;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            .content-section {
                padding: 25px;
            }
        }
        .content-paragraph {
            margin-bottom: 25px;
            text-align: justify;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            display: block;
        }
        .tip-box {
            background: linear-gradient(135deg, #E3F2FD, #BBDEFB);
            border-left: 5px solid var(--primary-color);
            padding: 20px;
            border-radius: 10px;
            margin: 25px 0;
        }