* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
            background-image: linear-gradient(to bottom, #e6f7ff 0%, #f0f9ff 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #1a73e8; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #0d47a1; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 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;
        }
        .logo a {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2rem;
            color: #4FC3F7;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i { color: #FFEB3B; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e3f2fd;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin: 0 10px;
            color: #666;
        }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        h1 {
            color: #1a237e;
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #FFC107;
            padding-bottom: 0.5rem;
        }
        h2 {
            color: #283593;
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
            border-top: 1px dashed #90a4ae;
        }
        h3 {
            color: #3949ab;
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #5c6bc0;
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: bold;
            color: #0d47a1;
            background: #e3f2fd;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 5px solid #2196F3;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fffde7;
            border-left: 4px solid #ffd600;
            padding: 1rem 1.2rem;
            margin: 1.5rem 0;
            font-style: italic;
        }
        .featured-image {
            margin: 2.5rem auto;
            text-align: center;
            border: 1px solid #ddd;
            padding: 10px;
            border-radius: 8px;
            background: #fafafa;
            max-width: 800px;
        }
        .featured-image figcaption {
            font-size: 0.9rem;
            color: #666;
            margin-top: 0.5rem;
        }
        ul, ol { margin-left: 2rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.5rem; }
        aside {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget h3 {
            font-size: 1.3rem;
            color: #1a237e;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #FFC107;
            margin-bottom: 1.2rem;
        }
        .search-box {
            display: flex;
        }
        .search-box input {
            flex: 1;
            padding: 0.8rem;
            border: 2px solid #1a73e8;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-box button {
            background: #1a73e8;
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-box button:hover { background: #0d47a1; }
        .rating-widget .stars {
            font-size: 1.8rem;
            color: #ddd;
            margin-bottom: 1rem;
        }
        .rating-widget .stars .filled { color: #FFC107; }
        .rating-form input, .comment-form textarea, .comment-form input {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #ccc;
            border-radius: 4px;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #1a73e8, #0d47a1);
            color: white;
            padding: 0.8rem 1.8rem;
            border: none;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(26, 115, 232, 0.3);
            text-decoration: none;
        }
        .internal-links {
            background: #f1f8e9;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .internal-links ul { display: flex; flex-wrap: wrap; gap: 1.5rem; list-style: none; margin: 0; }
        .internal-links li { margin: 0; }
        .internal-links a {
            background: #388e3c;
            color: white;
            padding: 0.6rem 1.2rem;
            border-radius: 30px;
            display: inline-block;
            font-weight: 600;
        }
        .internal-links a:hover { background: #2e7d32; text-decoration: none; }
        footer {
            background: #263238;
            color: #eceff1;
            padding: 3rem 0 2rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-logo { font-size: 1.8rem; color: #4FC3F7; margin-bottom: 1rem; }
        .footer-nav ul { list-style: none; }
        .footer-nav li { margin-bottom: 0.8rem; }
        .footer-nav a { color: #bbdefb; }
        .footer-nav a:hover { color: white; }
        friend-link {
            display: block;
            background: #37474f;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        friend-link a {
            color: #80d8ff;
            font-weight: bold;
            font-size: 1.1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #546e7a;
            font-size: 0.9rem;
            color: #b0bec5;
        }
        .text-center { text-align: center; }
        .mt-3 { margin-top: 3rem; }
        .mb-3 { margin-bottom: 3rem; }
        .updated {
            font-size: 0.9rem;
            color: #78909c;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        .emoji { font-size: 1.2em; }
        .bold { font-weight: 800; }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav { display: none; width: 100%; order: 3; margin-top: 1rem; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 0; }
            .main-nav li { width: 100%; }
            .main-nav a { display: block; padding: 1rem; border-bottom: 1px solid rgba(255,255,255,0.1); }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            article { padding: 1.5rem; }
            .internal-links ul { flex-direction: column; }
            aside { position: static; }
        }