* {
            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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #2c3e50, #4a6491);
            color: white;
            padding: 1.2rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2rem;
            font-weight: 800;
            text-decoration: none;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: transform 0.3s ease;
        }
        .logo:hover {
            transform: scale(1.05);
        }
        .logo span {
            color: #00d4ff;
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .nav-link {
            color: #e0e0e0;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
            transition: all 0.3s;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: white;
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: #00d4ff;
            transition: all 0.3s;
            transform: translateX(-50%);
        }
        .nav-link:hover::after {
            width: 80%;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: #2c3e50;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #666;
            background: #f8f9fa;
            border-bottom: 1px solid #eaeaea;
        }
        .breadcrumb a {
            color: #4a6491;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .main-article {
            background: white;
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 2px solid #f0f0f0;
            padding-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #2c3e50;
            line-height: 1.2;
            margin-bottom: 1rem;
            background: linear-gradient(90deg, #2c3e50, #4a6491);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        h2 {
            font-size: 2rem;
            color: #2c3e50;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eaeaea;
        }
        h3 {
            font-size: 1.5rem;
            color: #4a6491;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #666;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            color: #444;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: #555;
            background: #f8fafc;
            padding: 1.5rem;
            border-left: 4px solid #00d4ff;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background: linear-gradient(120deg, #e3f2fd 0%, #f3e5f5 100%);
            padding: 1.8rem;
            border-radius: 10px;
            margin: 2rem 0;
            border-left: 5px solid #9c27b0;
        }
        .tip-box {
            background: #e8f5e9;
            border-left: 5px solid #4caf50;
            padding: 1.5rem;
            margin: 1.8rem 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box i {
            color: #4caf50;
            margin-right: 10px;
        }
        .stats-box {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2rem;
            border-radius: 12px;
            margin: 2rem 0;
            text-align: center;
        }
        .stats-box h3 {
            color: white;
            margin-top: 0;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .content-link {
            color: #2196f3;
            text-decoration: none;
            border-bottom: 1px dotted #2196f3;
            transition: all 0.3s;
        }
        .content-link:hover {
            color: #0d47a1;
            border-bottom: 1px solid #0d47a1;
        }
        .related-links {
            background: #f9f9f9;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .related-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }
        .related-links li {
            padding: 8px 0;
        }
        .search-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #e0e0e0;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .search-input:focus {
            outline: none;
            border-color: #4a6491;
        }
        .search-btn {
            background: linear-gradient(90deg, #4a6491, #2c3e50);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: all 0.3s;
        }
        .search-btn:hover {
            background: linear-gradient(90deg, #2c3e50, #4a6491);
            transform: translateY(-2px);
        }
        .rating-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffc107;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars i {
            margin: 0 3px;
            transition: transform 0.2s;
        }
        .stars i:hover {
            transform: scale(1.3);
        }
        .rating-form {
            display: none;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1rem;
        }
        .rating-form.active {
            display: flex;
        }
        .rating-form textarea, .rating-form input {
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-family: inherit;
        }
        .rating-form button {
            background: #4caf50;
            color: white;
            border: none;
            padding: 12px;
            border-radius: 5px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .rating-form button:hover {
            background: #388e3c;
        }
        .comments-section {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-top: 3rem;
        }
        .comment-form {
            display: grid;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .comment-form input, .comment-form textarea {
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .comment-form button {
            background: linear-gradient(90deg, #2196f3, #1976d2);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }
        .comment-form button:hover {
            background: linear-gradient(90deg, #1976d2, #0d47a1);
            transform: translateY(-2px);
        }
        .comment {
            background: #f9f9f9;
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 1.5rem;
            border-left: 4px solid #2196f3;
        }
        .comment-author {
            font-weight: bold;
            color: #2c3e50;
            margin-bottom: 0.5rem;
        }
        .comment-date {
            color: #888;
            font-size: 0.9rem;
            margin-left: 10px;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #f0f0f0;
        }
        site-footer {
            background: #2c3e50;
            color: #e0e0e0;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #b0bec5;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #00d4ff;
        }
        friend-link {
            display: block;
            margin: 1.5rem 0;
            padding: 1rem;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #3a506b;
            color: #90a4ae;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .main-article {
                padding: 1.5rem;
            }
            .content-wrapper {
                gap: 2rem;
            }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.6s ease-out forwards;
        }
        .text-bold {
            font-weight: 700;
            color: #2c3e50;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .section-divider {
            height: 3px;
            background: linear-gradient(90deg, #00d4ff, #9c27b0);
            margin: 3rem 0;
            border-radius: 3px;
        }