:root {
            --primary: #0056b3;
            --secondary: #00a8ff;
            --accent: #ff4757;
            --dark: #1e272e;
            --light: #f5f6fa;
            --gray: #808e9b;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 1.2rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: white;
            text-decoration: none;
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0.8rem;
            border-radius: 5px;
            transition: var(--transition);
        }
        .nav-links a:hover,
        .nav-links a.active {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 1rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: var(--gray);
        }
        .hero {
            background: linear-gradient(rgba(0, 84, 179, 0.85), rgba(0, 168, 255, 0.85)), url('https://images.unsplash.com/photo-1542751371-adc38448a05e?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            text-align: center;
            padding: 5rem 2rem;
            border-radius: 10px;
            margin-bottom: 3rem;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .search-container {
            max-width: 600px;
            margin: 2rem auto 3rem;
            padding: 0 1rem;
        }
        .search-box {
            display: flex;
            background: white;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 2px solid var(--primary);
        }
        .search-box input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            outline: none;
            font-size: 1.1rem;
        }
        .search-box button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .search-box button:hover {
            background-color: var(--secondary);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 4rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            border-radius: 10px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        article h2 {
            color: var(--primary);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary);
            font-size: 2.2rem;
        }
        article h3 {
            color: var(--dark);
            margin: 2rem 0 1rem;
            font-size: 1.7rem;
        }
        article p {
            margin-bottom: 1.5rem;
            font-size: 1.15rem;
            text-align: justify;
        }
        article em {
            color: var(--gray);
            font-style: italic;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 5px solid #ffc107;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 5px 5px 0;
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .image-container img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            border: 1px solid #ddd;
        }
        .image-container figcaption {
            margin-top: 0.8rem;
            font-style: italic;
            color: var(--gray);
            font-size: 0.95rem;
        }
        .link-list {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .link-list h4 {
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 0.8rem;
        }
        .link-list a {
            color: var(--secondary);
            text-decoration: none;
            padding: 0.5rem;
            display: block;
            border-radius: 5px;
            transition: var(--transition);
        }
        .link-list a:hover {
            background-color: rgba(0, 168, 255, 0.1);
            padding-left: 1rem;
        }
        aside {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2.5rem;
        }
        .sidebar-section h3 {
            color: var(--primary);
            margin-bottom: 1.2rem;
            font-size: 1.4rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 1.5rem;
        }
        .stars {
            color: #ffc107;
            font-size: 1.5rem;
        }
        .user-input {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .user-input input,
        .user-input textarea,
        .user-input select {
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .user-input input:focus,
        .user-input textarea:focus,
        .user-input select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.2);
        }
        .user-input button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .user-input button:hover {
            background-color: var(--secondary);
        }
        .comments-section {
            background: white;
            border-radius: 10px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 4rem;
        }
        .comment {
            border-bottom: 1px solid #eee;
            padding: 1.5rem 0;
            display: flex;
            gap: 1.5rem;
        }
        .comment:last-of-type {
            border-bottom: none;
        }
        .comment-avatar {
            width: 60px;
            height: 60px;
            background-color: var(--secondary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.8rem;
            flex-shrink: 0;
        }
        .comment-content h4 {
            color: var(--dark);
            margin-bottom: 0.5rem;
        }
        .comment-meta {
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 0.8rem;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 768px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        .footer-section h3 {
            color: var(--secondary);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
            font-size: 0.95rem;
            color: #aaa;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2f3640;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--primary);
                padding: 1.5rem;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
                z-index: 999;
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            article {
                padding: 1.8rem;
            }
            article h2 {
                font-size: 1.8rem;
            }
            article h3 {
                font-size: 1.5rem;
            }
        }
        .btn {
            display: inline-block;
            background-color: var(--accent);
            color: white;
            padding: 0.9rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background-color: #ff3742;
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(255, 71, 87, 0.3);
        }
        .tag {
            display: inline-block;
            background-color: #e9ecef;
            color: var(--dark);
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .text-center {
            text-align: center;
        }
        .mb-3 {
            margin-bottom: 3rem;
        }