:root {
            --primary-color: #1a73e8;
            --secondary-color: #34a853;
            --accent-color: #ea4335;
            --text-color: #202124;
            --light-bg: #f8f9fa;
            --border-color: #dadce0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #fff;
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: #fff;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--primary-color);
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        .logo span {
            color: var(--accent-color);
        }
        .logo:hover {
            transform: scale(1.05);
        }
        .search-form {
            display: flex;
            width: 300px;
        }
        .search-input {
            flex: 1;
            padding: 10px 15px;
            border: 2px solid var(--border-color);
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
        }
        .search-input:focus {
            border-color: var(--primary-color);
        }
        .search-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 0 50px 50px 0;
            padding: 10px 20px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary-color);
        }
        nav {
            background-color: var(--light-bg);
            border-top: 1px solid var(--border-color);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-right: 25px;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 1.1rem;
            padding: 5px 10px;
            border-radius: 5px;
        }
        .nav-links a:hover {
            background-color: var(--primary-color);
            color: white;
        }
        .breadcrumb {
            padding: 10px 0;
            font-size: 0.9rem;
            color: #5f6368;
        }
        .breadcrumb a {
            color: #5f6368;
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        main {
            padding: 30px 0;
        }
        .article-header {
            margin-bottom: 30px;
            text-align: center;
            padding: 20px;
            background: linear-gradient(135deg, #1a73e8, #34a853);
            border-radius: 15px;
            color: white;
        }
        .article-header h1 {
            font-size: 2.8rem;
            margin-bottom: 10px;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 20px;
            font-size: 0.95rem;
            opacity: 0.9;
        }
        .content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-body {
            font-size: 1.1rem;
        }
        .article-body p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .article-body h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 30px 0 15px;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 5px;
        }
        .article-body h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin: 25px 0 10px;
        }
        .highlight {
            background-color: #e8f0fe;
            padding: 15px;
            border-left: 5px solid var(--primary-color);
            margin: 20px 0;
            border-radius: 0 10px 10px 0;
        }
        .image-container {
            margin: 30px 0;
            text-align: center;
        }
        .feature-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 15px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .feature-img:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        .link-list {
            background-color: var(--light-bg);
            padding: 20px;
            border-radius: 10px;
            margin: 25px 0;
        }
        .link-list h3 {
            margin-top: 0;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }
        .link-list li {
            padding: 8px 15px;
            background-color: white;
            border-radius: 5px;
            transition: var(--transition);
        }
        .link-list li:hover {
            background-color: var(--primary-color);
        }
        .link-list li:hover a {
            color: white;
        }
        .sidebar {
            background-color: var(--light-bg);
            padding: 20px;
            border-radius: 15px;
            height: fit-content;
        }
        .sidebar-section {
            margin-bottom: 30px;
        }
        .sidebar h3 {
            color: var(--primary-color);
            margin-bottom: 15px;
            font-size: 1.4rem;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #ffc107;
            cursor: pointer;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            border-color: var(--primary-color);
            outline: none;
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .form-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .form-btn:hover {
            background-color: var(--secondary-color);
        }
        footer {
            background-color: #202124;
            color: white;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        friend-link {
            display: block;
            margin-bottom: 10px;
        }
        friend-link a {
            color: #ccc;
            padding: 5px 0;
            display: block;
            border-bottom: 1px solid #333;
        }
        friend-link a:hover {
            color: white;
            border-color: var(--primary-color);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            .content {
                grid-template-columns: 1fr;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: white;
                box-shadow: var(--shadow);
                padding: 20px;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin: 10px 0;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                width: 200px;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 15px;
            }
            .search-form {
                width: 100%;
                max-width: 400px;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.6rem;
            }
            .link-list ul {
                grid-template-columns: 1fr;
            }
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .fade-in {
            animation: fadeIn 1s ease-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }