:root {
            --primary-color: #ff6b35;
            --secondary-color: #004e98;
            --accent-color: #ffd166;
            --text-dark: #2d3142;
            --text-light: #f7f7f7;
            --bg-gradient: linear-gradient(135deg, #ff6b35 0%, #004e98 100%);
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #f8f9fa;
        }
        .logo-text {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            background: var(--bg-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .nav-custom {
            background: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            padding: 1rem 0;
        }
        .hero-section {
            background: var(--bg-gradient);
            color: white;
            padding: 4rem 0;
            margin-bottom: 3rem;
            border-radius: 0 0 30px 30px;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            padding: 2.5rem;
            margin-bottom: 2rem;
        }
        h1, h2, h3 {
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            color: white;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--primary-color);
            padding-left: 1rem;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: rgba(255, 107, 53, 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-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            margin: 2rem 0;
        }
        .img-container img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .img-container:hover img {
            transform: scale(1.03);
        }
        .table-of-contents {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 12px;
            padding: 2rem;
            margin: 2rem 0;
        }
        .table-of-contents h3 {
            color: var(--secondary-color);
            margin-top: 0;
        }
        .table-of-contents ul {
            list-style-type: none;
            padding-left: 0;
        }
        .table-of-contents li {
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .table-of-contents li:before {
            content: "▶";
            color: var(--primary-color);
            position: absolute;
            left: 0;
        }
        .table-of-contents a {
            color: var(--text-dark);
            text-decoration: none;
            transition: color 0.3s;
        }
        .table-of-contents a:hover {
            color: var(--primary-color);
        }
        .key-feature {
            text-align: center;
            padding: 1.5rem;
            border-radius: 12px;
            transition: all 0.3s ease;
            height: 100%;
        }
        .key-feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        footer {
            background: var(--secondary-color);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .copyright {
            border-top: 1px solid rgba(255,255,255,0.2);
            padding-top: 1.5rem;
            margin-top: 2rem;
            text-align: center;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .content-section {
                padding: 1.5rem;
            }
            .hero-section {
                padding: 2.5rem 0;
            }
        }
        .keyword-highlight {
            font-weight: 700;
            color: var(--primary-color);
        }
        .quote {
            font-style: italic;
            border-left: 4px solid var(--accent-color);
            padding-left: 1.5rem;
            margin: 2rem 0;
            color: #666;
        }