* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #4a6fa5;
            --secondary: #166088;
            --accent: #ff6b6b;
            --light: #f8f9fa;
            --dark: #343a40;
            --gray: #6c757d;
            --light-gray: #e9ecef;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            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;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent);
        }
        .my-logo:hover {
            color: var(--light-gray);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-input {
            flex: 1;
            padding: 10px 15px;
            border: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #ff5252;
        }
        nav {
            background-color: rgba(0, 0, 0, 0.1);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            position: relative;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            padding: 15px 20px;
            display: block;
            transition: var(--transition);
            font-weight: 500;
        }
        .nav-links a:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 10px;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--light-gray);
            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(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 40px 0;
            background-color: white;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        article {
            line-height: 1.8;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--secondary);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-gray);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--gray);
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: var(--secondary);
            font-weight: 500;
            margin-bottom: 30px;
            padding-left: 20px;
            border-left: 4px solid var(--accent);
        }
        .highlight {
            background-color: rgba(255, 107, 107, 0.1);
            padding: 20px;
            border-radius: var(--radius);
            margin: 25px 0;
            border-left: 4px solid var(--accent);
        }
        emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        strong {
            color: var(--secondary);
            font-weight: 700;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 30px auto;
            display: block;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        sidebar {
            background-color: var(--light);
            padding: 25px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 30px;
        }
        .sidebar-section h3 {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--light-gray);
        }
        .quick-links {
            list-style: none;
        }
        .quick-links li {
            margin-bottom: 10px;
        }
        .quick-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            color: var(--dark);
        }
        .quick-links a:hover {
            color: var(--accent);
        }
        .quick-links i {
            color: var(--primary);
            width: 20px;
        }
        .rating-form, .comment-form {
            background-color: white;
            padding: 25px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 40px 0;
        }
        .form-title {
            color: var(--primary);
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin-bottom: 20px;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars label:hover,
        .rating-stars label:hover ~ label,
        .rating-stars input:checked ~ label {
            color: #ffc107;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: var(--secondary);
            transform: translateY(-2px);
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 15px;
            border-radius: var(--radius);
            margin-bottom: 10px;
            transition: var(--transition);
        }
        friend-link a {
            color: #4fc3f7;
            text-decoration: none;
            font-weight: 500;
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #bbb;
            font-size: 0.9rem;
        }
        .update-time {
            color: var(--accent);
            font-style: italic;
            margin: 30px 0;
            padding: 15px;
            background-color: rgba(255, 107, 107, 0.05);
            border-radius: var(--radius);
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 20px;
            }
            .search-form {
                max-width: 100%;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                flex-direction: column;
                background-color: var(--secondary);
                transition: var(--transition);
                box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
                z-index: 999;
            }
            .nav-links.active {
                left: 0;
            }
            .nav-links a {
                padding: 15px 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .mt-40 { margin-top: 40px; }
        .mb-40 { margin-bottom: 40px; }