* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #3498db;
            --light: #ecf0f1;
            --dark: #1a1a1a;
            --gray: #7f8c8d;
            --success: #27ae60;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --container-width: 1200px;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
            font-size: 1.05rem;
        }
        a { color: var(--accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: var(--accent);
            color: white;
            padding: 12px 28px;
            border-radius: var(--border-radius);
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        section { padding: 60px 0; }
        h1, h2, h3, h4 {
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: var(--primary);
        }
        h1 { font-size: 2.8rem; margin-top: 0.5rem; }
        h2 { font-size: 2.2rem; border-left: 5px solid var(--secondary); padding-left: 15px; margin-top: 2.5rem; }
        h3 { font-size: 1.8rem; color: var(--dark); margin-top: 2rem; }
        h4 { font-size: 1.4rem; color: var(--gray); margin-top: 1.5rem; }
        p { margin-bottom: 1.5rem; }
        ul, ol { margin-bottom: 1.5rem; padding-left: 2rem; }
        li { margin-bottom: 0.5rem; }
        blockquote {
            border-left: 4px solid var(--accent);
            padding-left: 20px;
            margin: 2rem 0;
            font-style: italic;
            color: var(--gray);
            background: rgba(52, 152, 219, 0.05);
            padding: 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .highlight { background-color: #fff9e6; padding: 2px 6px; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        header {
            background-color: var(--primary);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: var(--secondary); }
        .my-logo:hover { color: var(--light); }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .desktop-nav a {
            color: var(--light);
            font-weight: 600;
            padding: 8px 0;
            position: relative;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: var(--transition);
        }
        .desktop-nav a:hover::after,
        .desktop-nav a.active::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            background: var(--dark);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
            padding: 20px;
            flex-direction: column;
            gap: 15px;
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a { color: white; font-weight: 600; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
        .breadcrumb {
            background-color: #f1f1f1;
            padding: 15px 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: var(--gray);
        }
        .breadcrumb a { color: var(--gray); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb li:last-child { color: var(--primary); font-weight: 600; }
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #1a2530 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
        }
        .hero h1 { color: white; font-size: 3rem; }
        .hero p { font-size: 1.3rem; max-width: 800px; margin: 20px auto 30px; color: #ddd; }
        .main-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin-top: 40px;
        }
        @media (max-width: 992px) {
            .main-layout { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: var(--gray);
            font-size: 0.95rem;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid #eee;
        }
        .featured-image {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 30px 0;
            overflow: hidden;
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img { transform: scale(1.03); }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .content-block {
            margin-bottom: 40px;
        }
        .tip-box, .warning-box {
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 25px 0;
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }
        .tip-box { background: #e8f7ef; border-left: 5px solid var(--success); }
        .warning-box { background: #fef3e9; border-left: 5px solid var(--secondary); }
        .tip-box i { color: var(--success); font-size: 1.5rem; }
        .warning-box i { color: var(--secondary); font-size: 1.5rem; }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            border-bottom: 2px solid #eee;
            padding-bottom: 10px;
            margin-bottom: 20px;
        }
        .search-form { display: flex; }
        .search-form input {
            flex-grow: 1;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background: var(--accent);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
        }
        .related-links ul {
            list-style: none;
            padding-left: 0;
        }
        .related-links li { margin-bottom: 12px; padding-bottom: 12px; border-bottom: 1px solid #f0f0f0; }
        .related-links a { display: block; font-weight: 500; }
        .comment-form, .rating-form {
            background: #f8f9fa;
            padding: 30px;
            border-radius: var(--border-radius);
            margin-top: 40px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--primary);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--accent);
            outline: none;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            margin: 10px 0;
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating i:hover,
        .star-rating i.active { color: #ffc107; }
        footer {
            background: var(--dark);
            color: #bbb;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 25px;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 10px;
            display: inline-block;
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { color: #bbb; }
        .footer-links a:hover { color: white; padding-left: 5px; }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.05);
            padding: 10px 15px;
            border-radius: 5px;
            margin: 5px;
            border: 1px solid rgba(255,255,255,0.1);
        }
        friend-link a { color: var(--accent); font-weight: 600; }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .hero { padding: 60px 0; }
            .hero h1 { font-size: 2.4rem; }
            .desktop-nav { display: none; }
            .hamburger { display: block; }
            .article-content { padding: 25px; }
            .main-layout { gap: 30px; }
        }