* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #2d3748;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: #3b82f6; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #1d4ed8; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .site-header {
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #fbbf24; }
        .my-logo:hover { text-decoration: none; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover { color: white; text-decoration: none; }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #fbbf24;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: #1e40af;
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            z-index: 999;
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a { color: white; padding: 0.8rem; border-bottom: 1px solid #3b82f6; }
        .mobile-nav a:hover { background: #3b82f6; }
        .breadcrumb {
            background: #e2e8f0;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: #64748b;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05); }
        .sidebar { background: white; padding: 1.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05); align-self: start; }
        h1 {
            font-size: 2.8rem;
            color: #1e3a8a;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #fbbf24;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #3b82f6;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        h3 { font-size: 1.5rem; color: #4b5563; margin: 1.8rem 0 0.8rem; }
        h4 { font-size: 1.2rem; color: #6b7280; margin: 1.5rem 0 0.6rem; }
        p { margin-bottom: 1.2rem; text-align: justify; }
        .lead {
            font-size: 1.25rem;
            color: #4b5563;
            font-weight: 500;
            margin-bottom: 2rem;
            padding: 1rem;
            background: #f0f9ff;
            border-radius: 8px;
            border-left: 4px solid #3b82f6;
        }
        strong { color: #1f2937; }
        .highlight { background: #fef3c7; padding: 0.2rem 0.4rem; border-radius: 4px; }
        .emoji { font-size: 1.2em; margin-right: 0.3rem; }
        .last-updated {
            font-size: 0.9rem;
            color: #6b7280;
            font-style: italic;
            margin-bottom: 2rem;
            padding: 0.5rem;
            background: #f9fafb;
            border-radius: 6px;
            display: inline-block;
        }
        .feature-box {
            background: linear-gradient(135deg, #dbeafe 0%, #eff6ff 100%);
            border: 1px solid #bfdbfe;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .feature-box h3 { color: #1e40af; margin-top: 0; }
        .article-image {
            margin: 2rem auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .article-image figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #6b7280;
            padding: 0.8rem;
            background: #f9fafb;
        }
        .interactive-module {
            background: white;
            border: 2px solid #e5e7eb;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2.5rem 0;
        }
        .module-title { display: flex; align-items: center; gap: 0.5rem; color: #1e3a8a; margin-bottom: 1rem; }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1rem;
        }
        .form-group { flex: 1; min-width: 200px; }
        label { display: block; margin-bottom: 0.3rem; font-weight: 600; color: #4b5563; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #d1d5db;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus { outline: none; border-color: #3b82f6; box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2); }
        button {
            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        button:hover { background: #1e40af; transform: translateY(-2px); box-shadow: 0 4px 8px rgba(30, 64, 175, 0.3); }
        .stars { display: flex; gap: 0.5rem; margin: 0.5rem 0; }
        .star { font-size: 1.5rem; color: #d1d5db; cursor: pointer; transition: color 0.2s; }
        .star:hover, .star.active { color: #fbbf24; }
        .sidebar h3 { color: #1e3a8a; margin-top: 0; }
        .link-list { list-style: none; }
        .link-list li { margin-bottom: 0.8rem; padding-left: 1rem; position: relative; }
        .link-list li::before {
            content: '→';
            position: absolute;
            left: 0;
            color: #3b82f6;
            font-weight: bold;
        }
        .tag-cloud { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; }
        .tag { background: #e0f2fe; color: #0369a1; padding: 0.4rem 0.8rem; border-radius: 50px; font-size: 0.85rem; }
        .tag:hover { background: #bae6fd; }
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo { font-size: 1.8rem; color: white; margin-bottom: 1rem; }
        .footer-section h4 { color: white; margin-bottom: 1rem; }
        friend-link {
            display: block;
            color: #60a5fa;
            margin-bottom: 0.5rem;
            padding: 0.3rem 0;
            border-bottom: 1px solid #334155;
        }
        friend-link:hover { color: #93c5fd; }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .main-nav ul { display: none; }
            .hamburger { display: block; }
            .article-content, .sidebar { padding: 1.5rem; }
            .header-container, .footer-container { flex-direction: column; text-align: center; gap: 1rem; }
        }