:root {
            --primary: #2c3e50;
            --secondary: #8e44ad;
            --accent: #f1c40f;
            --light: #ecf0f1;
            --dark: #1a1a1a;
            --gray: #7f8c8d;
            --success: #27ae60;
            --warning: #e67e22;
            --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-heading: 'Georgia', 'Times New Roman', serif;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            line-height: 1.8;
            color: var(--dark);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        header {
            background: linear-gradient(to right, var(--primary), var(--secondary));
            color: white;
            padding: 1.5rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent);
            text-decoration: none;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
            transition: var(--transition);
        }
        .my-logo:hover {
            color: white;
            transform: scale(1.05);
        }
        nav {
            display: flex;
            gap: 2.5rem;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: width 0.3s ease;
        }
        .nav-links a:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--accent);
        }
        .search-form {
            display: flex;
            margin-left: 1.5rem;
        }
        .search-input {
            padding: 0.7rem 1.2rem;
            border: none;
            border-radius: 25px 0 0 25px;
            width: 250px;
            font-size: 0.95rem;
            outline: none;
        }
        .search-btn {
            background: var(--accent);
            color: var(--primary);
            border: none;
            padding: 0.7rem 1.5rem;
            border-radius: 0 25px 25px 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: #ffd700;
            transform: scale(1.05);
        }
        .breadcrumb {
            background: var(--light);
            padding: 1rem 2rem;
            border-bottom: 1px solid #ddd;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        .breadcrumb .separator {
            margin: 0 0.5rem;
            color: var(--gray);
        }
        main {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: var(--shadow);
        }
        h1 {
            font-family: var(--font-heading);
            font-size: 3.2rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--accent);
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--secondary);
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light);
        }
        h3 {
            font-size: 1.7rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--dark);
            margin: 2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--primary);
            font-weight: 600;
            background: linear-gradient(90deg, var(--light), transparent);
            padding: 1.5rem;
            border-left: 5px solid var(--accent);
            border-radius: 0 8px 8px 0;
            margin: 2.5rem 0;
        }
        .highlight {
            background: linear-gradient(120deg, var(--accent) 0%, var(--accent) 100%);
            background-repeat: no-repeat;
            background-size: 100% 40%;
            background-position: 0 90%;
            padding: 0 0.2rem;
            font-weight: 700;
        }
        .keyword-link {
            color: var(--secondary);
            text-decoration: none;
            border-bottom: 2px dotted var(--secondary);
            transition: var(--transition);
            font-weight: 600;
        }
        .keyword-link:hover {
            color: var(--primary);
            border-bottom-style: solid;
            background: rgba(142, 68, 173, 0.1);
        }
        .article-image {
            width: 100%;
            max-width: 900px;
            height: auto;
            border-radius: 10px;
            margin: 2.5rem auto;
            display: block;
            box-shadow: 0 10px 25px 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: var(--gray);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        ul, ol {
            margin: 1.5rem 0 1.5rem 2.5rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        aside {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-widget {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .widget-title i {
            color: var(--secondary);
        }
        .rating-container {
            text-align: center;
        }
        .stars {
            font-size: 2.2rem;
            color: var(--gray);
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars .active {
            color: var(--accent);
        }
        .rating-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            margin: 1rem 0;
            resize: vertical;
            min-height: 120px;
            font-family: inherit;
        }
        .submit-btn {
            background: linear-gradient(to right, var(--secondary), var(--primary));
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 25px;
            cursor: pointer;
            font-weight: 600;
            width: 100%;
            transition: var(--transition);
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(0, 0, 0, 0.2);
        }
        .update-info {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2.5rem 0;
            text-align: center;
        }
        .update-info i {
            font-size: 1.8rem;
            margin-bottom: 0.8rem;
        }
        footer {
            background: var(--primary);
            color: white;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: var(--accent);
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 1.2rem;
            border-radius: 8px;
            margin: 1rem 0;
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateX(5px);
        }
        friend-link a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            display: block;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            color: #bbb;
            font-size: 0.9rem;
        }
        @media (max-width: 1100px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 2rem;
            }
        }
        @media (max-width: 900px) {
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 1.9rem;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--primary);
                flex-direction: column;
                padding: 1.5rem;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.2);
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                margin-left: 0;
                margin-top: 1.5rem;
                width: 100%;
            }
            .search-input {
                width: 100%;
            }
            .header-container {
                flex-wrap: wrap;
            }
        }
        @media (max-width: 768px) {
            article {
                padding: 2rem;
            }
            aside {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.8rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            article {
                padding: 1.5rem;
            }
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .text-center {
            text-align: center;
        }
        .mt-3 { margin-top: 3rem; }
        .mb-3 { margin-bottom: 3rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }