* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2a475e; 
            --secondary: #c7d5e0; 
            --accent: #ffa500; 
            --dark: #1b2838;
            --light: #f5f5f5;
            --text: #333;
            --text-light: #888;
            --success: #5cb85c;
            --warning: #f0ad4e;
            --danger: #d9534f;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--light);
            color: var(--text);
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark);
            color: var(--secondary);
            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 a {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo a:hover {
            color: #fff;
        }
        .search-form {
            display: flex;
            flex-grow: 1;
            max-width: 400px;
            margin: 0 30px;
        }
        .search-form input {
            flex-grow: 1;
            padding: 10px 15px;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #ff8c00;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--secondary);
            font-size: 1.5rem;
            cursor: pointer;
        }
        nav {
            background-color: var(--primary);
            padding: 10px 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
            justify-content: center;
            gap: 25px;
        }
        .nav-links a {
            color: var(--secondary);
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
        }
        .nav-links a:hover,
        .nav-links a.active {
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "/";
            margin: 0 10px;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--primary);
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        .article-header {
            margin-bottom: 30px;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 20px;
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.2;
        }
        .meta {
            display: flex;
            gap: 20px;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            font-size: 1.1rem;
        }
        .article-body h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin: 30px 0 15px;
            padding-bottom: 8px;
            border-bottom: 1px dashed var(--secondary);
        }
        .article-body h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin: 25px 0 12px;
        }
        .article-body p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 20px;
            padding-left: 20px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 4px solid var(--accent);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 4px 4px 0;
        }
        .pro-tip {
            background-color: #e8f4fd;
            border-left: 4px solid #66b3ff;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 4px 4px 0;
        }
        .pro-tip i {
            color: #66b3ff;
            margin-right: 10px;
        }
        .image-container {
            margin: 25px 0;
            text-align: center;
        }
        .image-container img {
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin: 0 auto;
        }
        .image-caption {
            font-style: italic;
            color: var(--text-light);
            margin-top: 8px;
            font-size: 0.9rem;
        }
        .link-inline {
            font-weight: 600;
            border-bottom: 1px dotted var(--primary);
        }
        .side-bar {
            background-color: #fff;
            padding: 25px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .side-bar h3 {
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary);
        }
        .toc {
            list-style: none;
            padding-left: 0;
        }
        .toc li {
            margin-bottom: 10px;
        }
        .toc a {
            display: block;
            padding: 8px 12px;
            background-color: #f8f9fa;
            border-radius: 4px;
        }
        .toc a:hover {
            background-color: #e9ecef;
            padding-left: 18px;
        }
        .user-interaction {
            background-color: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin-top: 40px;
        }
        .user-interaction h2 {
            color: var(--primary);
            margin-bottom: 25px;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 30px;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: var(--warning);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            padding: 12px 25px;
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            align-self: flex-start;
        }
        .btn:hover {
            background-color: var(--accent);
            transform: translateY(-2px);
        }
        .footer-links {
            background-color: var(--dark);
            padding: 40px 0;
            margin-top: 50px;
        }
        .web-link {
            display: inline-block;
            background-color: rgba(255,255,255,0.05);
            padding: 12px 20px;
            margin: 0 10px 10px 0;
            border-radius: 4px;
            color: var(--secondary);
        }
        .web-link:hover {
            background-color: rgba(255,255,255,0.1);
            color: white;
        }
        footer {
            background-color: #111;
            color: #aaa;
            text-align: center;
            padding: 30px 0;
        }
        .copyright {
            margin-top: 20px;
            font-size: 0.9rem;
            color: #777;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin: 15px 0 0;
                max-width: 100%;
            }
            .mobile-menu-btn {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                gap: 10px;
                padding: 20px 0;
            }
            .nav-links.active {
                display: flex;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .meta {
                flex-direction: column;
                gap: 5px;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }