* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            transition: background-color 0.3s;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: #2c5aa0;
            transition: color 0.3s;
        }
        a:hover {
            color: #e63946;
        }
        ul, ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        blockquote {
            border-left: 4px solid #2c5aa0;
            padding-left: 1rem;
            margin: 1.5rem 0;
            font-style: italic;
            color: #555;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .highlight { background-color: #fffacd; padding: 2px 4px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        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;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #ffd166; }
        .desktop-nav {
            display: flex;
            gap: 1.5rem;
        }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
        }
        .desktop-nav a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            transition: background 0.3s;
        }
        .desktop-nav a:hover {
            background: rgba(255,255,255,0.15);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: #2a5298;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a {
            color: white;
            padding: 0.75rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            padding: 1rem;
            background: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #2c5aa0; }
        .breadcrumb span { color: #888; }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            main { grid-template-columns: 1fr; }
        }
        .content-area {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        aside {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
        }
        .widget {
            margin-bottom: 2rem;
        }
        .widget h3 {
            border-bottom: 2px solid #2c5aa0;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
            color: #1e3c72;
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background: #2c5aa0;
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover { background: #1e3c72; }
        h1 {
            font-size: 2.5rem;
            color: #1e3c72;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
        }
        .article-meta {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #eee;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .article-meta span i { margin-right: 5px; }
        h2, h3, h4 {
            color: #2a5298;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .feature-img {
            margin: 2rem auto;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .inset-box {
            background: #f0f7ff;
            border-left: 5px solid #2c5aa0;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .interaction-form {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            font-size: 1.5rem;
            color: #ffd700;
            cursor: pointer;
        }
        .star-rating span { transition: transform 0.2s; }
        .star-rating span:hover { transform: scale(1.2); }
        .btn {
            background: #2c5aa0;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background 0.3s, transform 0.2s;
        }
        .btn:hover {
            background: #1e3c72;
            transform: translateY(-2px);
        }
        footer {
            background: #1a1a2e;
            color: #ddd;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #ffd166;
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        .friend-links {
            list-style: none;
            padding-left: 0;
        }
        .friend-links li { margin-bottom: 0.8rem; }
        .friend-links a { color: #aaa; }
        .friend-links a:hover { color: #ffd166; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 576px) {
            .content-area, aside { padding: 1.5rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.3rem; }
        }