* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #1e3a8a; 
            --secondary: #dc2626; 
            --accent: #fbbf24; 
            --light: #f8fafc; 
            --dark: #0f172a; 
            --text: #334155; 
            --text-light: #64748b;
            --success: #10b981;
            --border: #cbd5e1;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--light);
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .py-3 { padding-top: 3rem; padding-bottom: 3rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .text-center { text-align: center; }
        .text-primary { color: var(--primary); }
        .bg-light { background-color: var(--light); }
        .bg-dark { background-color: var(--dark); color: white; }
        .rounded { border-radius: 8px; }
        .shadow { box-shadow: var(--shadow); }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--secondary);
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: #b91c1c;
            transform: translateY(-3px);
        }
        .section-title {
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 10px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
        }
        .text-center .section-title::after { left: 50%; transform: translateX(-50%); }
        .site-header {
            background-color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: var(--secondary); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--secondary);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #f1f5f9;
            padding: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin: 0 10px;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--text);
            text-decoration: none;
        }
        .breadcrumb a:hover { color: var(--secondary); }
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #1e40af 100%);
            color: white;
            padding: 4rem 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 3rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .article-content h2 { font-size: 2rem; margin-top: 3rem; margin-bottom: 1.5rem; }
        .article-content h3 { font-size: 1.6rem; margin-top: 2.5rem; margin-bottom: 1rem; }
        .article-content h4 { font-size: 1.3rem; margin-top: 2rem; margin-bottom: 0.8rem; }
        .article-content p { margin-bottom: 1.5rem; font-size: 1.05rem; }
        .article-content ul, .article-content ol {
            margin-bottom: 1.5rem;
            padding-left: 2rem;
        }
        .article-content li { margin-bottom: 0.5rem; }
        .article-content strong { color: var(--dark); font-weight: 700; }
        .highlight-box {
            background: linear-gradient(to right, #fef3c7, #fde68a);
            border-left: 5px solid var(--accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .featured-image {
            margin: 2.5rem 0;
            text-align: center;
        }
        .featured-image img {
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        .image-caption {
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .last-updated {
            font-size: 0.9rem;
            color: var(--text-light);
            text-align: right;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border);
        }
        .last-updated i { margin-right: 5px; }
        .sidebar-widget {
            background: white;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent);
        }
        .search-form {
            display: flex;
            margin-bottom: 0;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid var(--border);
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed var(--border);
        }
        .related-links a {
            color: var(--text);
            text-decoration: none;
            display: block;
            transition: var(--transition);
        }
        .related-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .related-links a i {
            margin-right: 8px;
            color: var(--primary);
        }
        .user-interaction {
            background: white;
            padding: 3rem;
            margin-top: 3rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .rating-form, .comment-form {
            margin-bottom: 2.5rem;
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0 1.5rem;
        }
        .star {
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active { color: var(--accent); }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        .form-row {
            display: flex;
            gap: 1rem;
        }
        .form-row .form-group { flex: 1; }
        @media (max-width: 768px) {
            .form-row { flex-direction: column; gap: 0; }
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 3rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 768px) {
            .footer-content { grid-template-columns: 1fr; }
        }
        .footer-widget h4 {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary);
        }
        .friend-links {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .friend-links li a {
            background: rgba(255,255,255,0.05);
            padding: 8px 15px;
            border-radius: 20px;
            color: #cbd5e1;
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .friend-links li a:hover {
            background: rgba(255,255,255,0.1);
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background: white;
                padding: 2rem;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                transition: left 0.5s ease;
            }
            .main-nav.active { left: 0; }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .hero h1 { font-size: 2.5rem; }
            .hero p { font-size: 1rem; }
            .article-content { padding: 2rem; }
            .section-title { font-size: 1.8rem; }
            .user-interaction { padding: 2rem; }
            .footer-content { grid-template-columns: 1fr; gap: 2rem; }
        }