:root {
            --primary-color: #ff6b35;
            --secondary-color: #1a1a2e;
            --accent-color: #ffd166;
            --text-light: #f8f9fa;
            --text-dark: #212529;
            --gradient-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            background: var(--gradient-bg);
            color: var(--text-light);
            line-height: 1.7;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .hero-section {
            background: url('https://via.placeholder.com/1200x600') center/cover no-repeat;
            min-height: 70vh;
            display: flex;
            align-items: center;
            position: relative;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(26, 26, 46, 0.85);
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .section-title {
            border-left: 5px solid var(--primary-color);
            padding-left: 1rem;
            margin: 3rem 0 1.5rem;
            font-weight: 700;
        }
        .content-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            margin-bottom: 2rem;
        }
        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(255, 107, 53, 0.2);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--accent-color);
            margin-bottom: 1rem;
        }
        .keyword-highlight {
            color: var(--accent-color);
            font-weight: 700;
            background: rgba(255, 209, 102, 0.1);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .img-fluid {
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        .nav-link {
            color: var(--text-light) !important;
            transition: color 0.3s ease;
            font-weight: 500;
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        footer {
            background: rgba(0, 0, 0, 0.3);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: 50vh;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }
        .content-paragraph {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .table-of-contents {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .toc-item {
            margin-bottom: 0.5rem;
        }
        .toc-item a {
            color: var(--text-light);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .toc-item a:hover {
            color: var(--primary-color);
        }