* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #2c5aa0;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #e74c3c;
        }
        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, #1a2980, #26d0ce);
            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: 2.2rem;
            font-weight: 800;
            font-family: 'Arial Black', sans-serif;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo a {
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo a:hover {
            color: #ffdd40;
        }
        .my-logo i {
            font-size: 2.5rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #ffdd40;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: #ffdd40;
            left: 0;
            bottom: -5px;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: inline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: #6c757d;
        }
        .breadcrumb a {
            color: #2c5aa0;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 2px solid #f1f1f1;
            padding-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2980;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            color: #666;
            font-size: 0.95rem;
        }
        .last-updated {
            background: #f1f8ff;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 600;
        }
        h2 {
            font-size: 2rem;
            color: #2c5aa0;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed #ddd;
        }
        h3 {
            font-size: 1.6rem;
            color: #34495e;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 1.8rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
            line-height: 1.7;
        }
        .intro {
            font-size: 1.3rem;
            font-weight: 500;
            color: #2c3e50;
            background: #f8f9fa;
            padding: 1.5rem;
            border-left: 5px solid #26d0ce;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        strong {
            color: #1a2980;
        }
        .featured-image {
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            max-width: 900px;
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.8rem;
            background: #f9f9f9;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.8rem;
            line-height: 1.6;
        }
        blockquote {
            border-left: 4px solid #26d0ce;
            padding: 1.5rem;
            margin: 2rem 0;
            background: #f1f8ff;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #2c3e50;
        }
        .note {
            background: #e8f4fc;
            border: 1px solid #b6e0fe;
            padding: 1.2rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        .note strong {
            color: #1a6bb0;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: 12px;
            padding: 1.8rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            color: #1a2980;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #f1f1f1;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 0.9rem 1rem;
            border: 2px solid #ddd;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input:focus {
            border-color: #26d0ce;
        }
        .search-form button {
            background: #2c5aa0;
            color: white;
            border: none;
            border-radius: 0 8px 8px 0;
            padding: 0 1.5rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #1a2980;
        }
        .link-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .link-list li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dotted #eee;
        }
        .link-list li:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .link-list a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding: 0.5rem;
            border-radius: 6px;
            transition: all 0.3s;
        }
        .link-list a:hover {
            background: #f0f7ff;
            padding-left: 1rem;
        }
        .link-list i {
            color: #26d0ce;
            width: 1.2rem;
        }
        .user-interaction {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            margin-top: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .user-interaction h2 {
            margin-top: 0;
        }
        .rating-section, .comment-section {
            margin-bottom: 2.5rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 2rem;
            color: #ffcc00;
        }
        .star {
            cursor: pointer;
            transition: transform 0.2s;
        }
        .star:hover {
            transform: scale(1.2);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        .form-group input,
        .form-group textarea {
            padding: 0.9rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #26d0ce;
            outline: none;
        }
        .submit-btn {
            background: linear-gradient(135deg, #1a2980, #26d0ce);
            color: white;
            border: none;
            border-radius: 8px;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
            align-self: flex-start;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(26, 41, 128, 0.2);
        }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 2rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            gap: 2.5rem;
        }
        .footer-links {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h3 {
            color: #26d0ce;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid rgba(255,255,255,0.1);
        }
        .footer-section ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-section li {
            margin-bottom: 0.8rem;
        }
        .footer-section a {
            color: #bdc3c7;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            transition: color 0.3s;
        }
        .footer-section a:hover {
            color: #26d0ce;
        }
        .footer-section i {
            width: 1.2rem;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 1.2rem;
            border-radius: 8px;
            margin-top: 1rem;
            border-left: 4px solid #26d0ce;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #95a5a6;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(26, 41, 128, 0.98);
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
                border-radius: 0 0 10px 10px;
                z-index: 999;
            }
            .main-nav.active ul {
                display: flex;
            }
            .main-nav li {
                margin: 0.5rem 0;
                text-align: center;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .footer-links {
                flex-direction: column;
                gap: 2rem;
            }
        }