* {
            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: #f8f9fa;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            color: #2c5282;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1a365d;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background: linear-gradient(135deg, #1a365d 0%, #2c5282 100%);
            color: white;
            padding: 1.5rem 0;
            border-radius: 0 0 15px 15px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            margin-bottom: 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #f6e05e;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #f6e05e;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }
        .desktop-nav a:hover,
        .desktop-nav a:focus {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
            color: white;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .mobile-nav {
            display: none;
            width: 100%;
            background-color: #2d3748;
            border-radius: 0 0 10px 10px;
            overflow: hidden;
            margin-top: 1rem;
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
            padding: 1rem 0;
        }
        .mobile-nav li {
            border-bottom: 1px solid #4a5568;
        }
        .mobile-nav a {
            display: block;
            padding: 1rem 2rem;
            color: #e2e8f0;
            font-weight: 600;
        }
        .mobile-nav a:hover {
            background-color: #4a5568;
            text-decoration: none;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #718096;
            border-bottom: 1px solid #e2e8f0;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.05);
        }
        h1 {
            font-size: 2.8rem;
            color: #1a365d;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #f6e05e;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #2c5282;
            margin: 2.5rem 0 1rem 0;
            padding-top: 1rem;
        }
        h3 {
            font-size: 1.6rem;
            color: #4a5568;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            font-size: 1.3rem;
            color: #718096;
            margin: 1.5rem 0 0.8rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: #4a5568;
            background-color: #edf2f7;
            padding: 1.5rem;
            border-left: 5px solid #f6e05e;
            border-radius: 5px;
            margin-bottom: 2rem;
        }
        emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .highlight {
            background-color: #fefcbf;
            padding: 0.2em 0.4em;
            border-radius: 3px;
            font-weight: 600;
        }
        .tip-box {
            background-color: #e6fffa;
            border-left: 5px solid #38b2ac;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 5px;
        }
        .tip-box h4 {
            color: #285e61;
            margin-top: 0;
        }
        .link-in-article {
            font-weight: 600;
            border-bottom: 2px dotted #2c5282;
        }
        .link-in-article:hover {
            border-bottom-style: solid;
        }
        .figure-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .figure-container img {
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            border: 1px solid #e2e8f0;
        }
        .figcaption {
            font-style: italic;
            color: #718096;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background-color: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            color: #2c5282;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.5rem;
            margin-bottom: 1.2rem;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #cbd5e0;
            border-right: none;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: #2c5282;
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .search-form button:hover {
            background-color: #1a365d;
        }
        .rating-form,
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .rating-form label,
        .comment-form label {
            font-weight: 600;
            color: #4a5568;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #cbd5e0;
            cursor: pointer;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: #f6e05e;
        }
        .rating-form textarea,
        .comment-form textarea {
            padding: 0.8rem;
            border: 2px solid #cbd5e0;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
            min-height: 100px;
            resize: vertical;
        }
        .rating-form button,
        .comment-form button {
            background-color: #38b2ac;
            color: white;
            border: none;
            padding: 0.9rem;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .rating-form button:hover,
        .comment-form button:hover {
            background-color: #2c9c96;
        }
        .site-footer {
            background-color: #1a202c;
            color: #cbd5e0;
            padding: 3rem 0 2rem;
            border-radius: 15px 15px 0 0;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-widget h4 {
            color: #f7fafc;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid #2d3748;
            padding-bottom: 0.5rem;
        }
        .friend-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .friend-links a {
            color: #90cdf4;
        }
        .friend-links a:hover {
            color: #63b3ed;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        .last-updated {
            font-style: italic;
            margin-top: 0.5rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .article-content { padding: 1.5rem; }
            .sidebar { padding: 1.5rem; position: static; }
            .header-container { padding: 0 1rem; }
            .desktop-nav { display: none; }
            .hamburger { display: block; }
            .breadcrumb { padding-left: 1rem; padding-right: 1rem; }
        }
        .clearfix::after {
            content: "";
            clear: both;
            display: table;
        }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }