:root {
            --primary-color: #FF9933;
            --secondary-color: #138808;
            --accent-color: #000080;
            --text-dark: #333333;
            --text-light: #666666;
            --bg-light: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #ffffff;
        }
        .logo-text {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
        .logo-accent {
            color: var(--primary-color);
        }
        .nav-custom {
            background: linear-gradient(135deg, var(--accent-color) 0%, #1a237e 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 {
            color: var(--primary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(19, 136, 8, 0.8), rgba(255, 153, 51, 0.8)), url('https://via.placeholder.com/1600x900') center/cover no-repeat;
            color: white;
            padding: 6rem 0;
            text-align: center;
        }
        .section-padding {
            padding: 4rem 0;
        }
        .section-alt {
            background-color: var(--bg-light);
        }
        h1, h2, h3 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--primary-color);
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 153, 51, 0.1);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .img-fluid {
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        .img-fluid:hover {
            transform: scale(1.02);
        }
        .footer {
            background-color: var(--accent-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .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: 1.5rem;
            text-decoration: none;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
            z-index: 1000;
            transition: all 0.3s ease;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
            color: white;
        }
        .content-image {
            margin: 2rem 0;
        }
        .key-term {
            font-weight: bold;
            color: var(--secondary-color);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .hero-section {
                padding: 4rem 0;
            }
            .section-padding {
                padding: 3rem 0;
            }
        }