:root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --secondary: #ff9800;
            --secondary-light: #ffb74d;
            --dark: #121212;
            --light: #f5f5f7;
            --gray: #757575;
            --success: #4caf50;
            --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            line-height: 1.7;
            color: var(--dark);
            background-color: var(--light);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 24px;
            background-color: var(--secondary);
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn:hover {
            background-color: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .site-header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            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(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-input {
            flex-grow: 1;
            padding: 12px 16px;
            border: 2px solid #e0e0e0;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
        }
        .search-btn:hover {
            background-color: var(--primary-light);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--primary);
        }
        .main-nav {
            background-color: var(--primary);
        }
        .nav-list {
            display: flex;
            justify-content: center;
        }
        .nav-item {
            position: relative;
        }
        .nav-link {
            color: white;
            padding: 18px 24px;
            display: block;
            font-weight: 500;
        }
        .nav-link:hover, .nav-item.active .nav-link {
            background-color: rgba(255,255,255,0.1);
            color: var(--secondary-light);
        }
        .breadcrumb {
            padding: 12px 0;
            background-color: #f0f0f0;
            font-size: 0.9rem;
        }
        .breadcrumb-list {
            display: flex;
            flex-wrap: wrap;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: var(--gray);
        }
        .breadcrumb-item a:hover {
            color: var(--secondary);
        }
        main {
            flex: 1;
            padding: 40px 0;
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
        }
        .article-title {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .article-meta {
            color: var(--gray);
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .article-content {
            background-color: white;
            border-radius: 8px;
            padding: 40px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .article-content p {
            margin-bottom: 1.5em;
            font-size: 1.1rem;
        }
        .article-content h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2em 0 1em;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        .article-content h3 {
            font-size: 1.6rem;
            color: var(--primary-light);
            margin: 1.8em 0 0.8em;
        }
        .article-content ul, .article-content ol {
            margin-left: 20px;
            margin-bottom: 1.5em;
        }
        .article-content li {
            margin-bottom: 0.5em;
        }
        .highlight-box {
            background-color: #e8f4fd;
            border-left: 4px solid var(--primary);
            padding: 20px;
            margin: 30px 0;
            border-radius: 0 4px 4px 0;
        }
        .featured-image {
            margin: 30px 0;
            text-align: center;
        }
        .featured-image img {
            border-radius: 8px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            margin: 0 auto;
        }
        .image-caption {
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .inline-link {
            color: var(--primary);
            font-weight: 600;
            border-bottom: 1px dotted var(--primary);
        }
        .inline-link:hover {
            color: var(--secondary);
            border-bottom-style: solid;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .rating-section, .comments-section {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid #eee;
        }
        .section-title {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 25px;
        }
        .rating-form, .comment-form {
            background-color: #f9f9f9;
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 30px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #ccc;
            margin: 10px 0;
        }
        .star-rating .star {
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: var(--secondary);
        }
        .site-footer {
            background-color: var(--dark);
            color: #ccc;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 15px;
            display: block;
        }
        .footer-description {
            line-height: 1.6;
        }
        .footer-heading {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-heading::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 2px;
            background-color: var(--secondary);
        }
        .friend-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .friend-link-item a {
            color: #aaa;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .friend-link-item a:hover {
            color: var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 992px) {
            .article-title {
                font-size: 2.2rem;
            }
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin-top: 15px;
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: white;
                box-shadow: 0 5px 10px rgba(0,0,0,0.1);
                display: none;
                flex-direction: column;
            }
            .main-nav.active {
                display: flex;
            }
            .nav-list {
                flex-direction: column;
            }
            .nav-link {
                color: var(--dark);
                padding: 15px 20px;
                border-bottom: 1px solid #eee;
            }
            .nav-link:hover {
                background-color: #f9f9f9;
            }
            .article-content {
                padding: 25px;
            }
            .article-title {
                font-size: 1.8rem;
            }
            .article-content h2 {
                font-size: 1.6rem;
            }
            .article-content h3 {
                font-size: 1.3rem;
            }
        }