:root {
            --primary-color: #ff6b35;
            --secondary-color: #004e98;
            --accent-color: #f7c59f;
            --text-dark: #2b2d42;
            --text-light: #8d99ae;
            --bg-light: #edf2f4;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #f8f9fa;
        }
        .logo-text {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary-color);
            text-shadow: 2px 2px 0px var(--secondary-color);
            letter-spacing: 1px;
        }
        .nav-link {
            font-weight: 600;
            transition: all 0.3s ease;
            border-radius: 5px;
            margin: 0 5px;
        }
        .nav-link:hover {
            background-color: var(--primary-color);
            color: white !important;
            transform: translateY(-2px);
        }
        h1, h2, h3 {
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 0.5rem;
            font-size: 2.8rem;
        }
        h2 {
            border-left: 5px solid var(--primary-color);
            padding-left: 1rem;
            margin-top: 3rem;
            font-size: 2.2rem;
        }
        h3 {
            color: var(--primary-color);
            font-size: 1.8rem;
            margin-top: 2.5rem;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            padding: 2.5rem;
            margin-bottom: 2.5rem;
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        .key-point {
            background: linear-gradient(135deg, var(--accent-color), #ffddd2);
            border-left: 5px solid var(--primary-color);
            padding: 1.5rem;
            border-radius: 0 10px 10px 0;
            margin: 1.5rem 0;
            font-weight: 600;
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-right: 1rem;
            vertical-align: middle;
        }
        .img-container {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            margin: 2rem 0;
            transition: transform 0.5s ease;
        }
        .img-container:hover {
            transform: scale(1.02);
        }
        .highlight {
            background-color: rgba(255, 107, 53, 0.1);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        footer {
            background: linear-gradient(135deg, var(--secondary-color), #00264d);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .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;
            box-shadow: 0 4px 10px rgba(0,0,0,0.3);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            background: #e55a2b;
        }
        @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;
            }
        }