:root {
            --primary-color: #8B4513;
            --secondary-color: #FFD700;
            --accent-color: #DC143C;
            --text-color: #2F4F4F;
            --light-bg: #FFF8DC;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            color: var(--text-color);
            background: linear-gradient(135deg, var(--light-bg) 0%, #f5f5f5 100%);
            line-height: 1.7;
        }
        .logo-text {
            font-family: 'Georgia', serif;
            font-weight: bold;
            color: var(--primary-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
            font-size: 2.2rem;
        }
        .nav-custom {
            background: linear-gradient(90deg, var(--primary-color) 0%, #A0522D 100%);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .nav-link {
            color: white !important;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 0.5rem 1rem !important;
        }
        .nav-link:hover {
            background-color: rgba(255,255,255,0.2);
            border-radius: 4px;
            transform: translateY(-2px);
        }
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 0.5rem;
            font-size: 2.8rem;
        }
        h2 {
            border-left: 5px solid var(--accent-color);
            padding-left: 1rem;
            margin-top: 2.5rem;
            font-size: 2.2rem;
        }
        h3 {
            color: var(--accent-color);
            font-size: 1.8rem;
            margin-top: 2rem;
        }
        .content-section {
            background: white;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            padding: 2.5rem;
            margin-bottom: 2rem;
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        .key-point {
            background: linear-gradient(135deg, #FFF8DC 0%, #FFEBCD 100%);
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .game-feature {
            background: white;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1rem 0;
            transition: all 0.3s ease;
        }
        .game-feature:hover {
            box-shadow: 0 8px 15px rgba(0,0,0,0.1);
            border-color: var(--secondary-color);
        }
        .feature-icon {
            color: var(--accent-color);
            font-size: 1.8rem;
            margin-right: 1rem;
        }
        .img-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            margin: 2rem 0;
            transition: transform 0.4s ease;
        }
        .img-container:hover {
            transform: scale(1.02);
        }
        .img-caption {
            background: rgba(0,0,0,0.7);
            color: white;
            padding: 0.8rem;
            font-style: italic;
            text-align: center;
        }
        .highlight {
            background: linear-gradient(120deg, var(--secondary-color) 0%, var(--secondary-color) 100%);
            background-repeat: no-repeat;
            background-size: 100% 0.4em;
            background-position: 0 88%;
            font-weight: 700;
            padding: 0.2rem 0.1rem;
        }
        .table-custom {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .table-custom thead {
            background: linear-gradient(90deg, var(--primary-color) 0%, #A0522D 100%);
            color: white;
        }
        footer {
            background: linear-gradient(90deg, #2F4F4F 0%, #1a2f2f 100%);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            background: #b01030;
            color: white;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .content-section { padding: 1.5rem; }
            .logo-text { font-size: 1.8rem; }
        }