* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #4A6FA5;
            --secondary-color: #FF6B6B;
            --accent-color: #FFD166;
            --text-dark: #333333;
            --text-light: #666666;
            --bg-light: #F8F9FA;
            --border-color: #E0E0E0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: white;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: white;
            border-bottom: 3px solid var(--primary-color);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: var(--secondary-color);
            transition: var(--transition);
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .main-nav {
            display: flex;
            gap: 1.5rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            align-items: center;
        }
        .nav-link {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary-color);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .search-form {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 25px;
            padding: 0.3rem 1rem;
            border: 1px solid var(--border-color);
        }
        .search-input {
            border: none;
            background: transparent;
            padding: 0.5rem;
            width: 200px;
            outline: none;
        }
        .search-btn {
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
            padding: 0.3rem;
            min-width: 44px;
            min-height: 44px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary-color);
            cursor: pointer;
            padding: 0.5rem;
            min-width: 44px;
            min-height: 44px;
        }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        .content-area {
            background: white;
        }
        .sidebar {
            background: var(--bg-light);
            padding: 1.5rem;
            border-radius: 10px;
            border: 1px solid var(--border-color);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--text-dark);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--primary-color);
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.1rem;
            color: var(--text-light);
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .lead-paragraph {
            font-size: 1.1rem;
            background: var(--bg-light);
            padding: 1.5rem;
            border-left: 4px solid var(--primary-color);
            border-radius: 5px;
            margin-bottom: 2rem;
        }
        .info-box {
            background: #E8F4FD;
            border: 1px solid #B8D4F0;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
        }
        .info-box h3 {
            color: #2C5282;
            margin-top: 0;
        }
        .tip-box {
            background: #FFF9E6;
            border: 1px solid #FFE58F;
            border-left: 4px solid var(--accent-color);
            padding: 1rem;
            margin: 1rem 0;
            border-radius: 5px;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }
        th, td {
            padding: 0.8rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        th {
            background: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background-color: var(--bg-light);
        }
        tr:hover {
            background-color: #E8F4FD;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }
        input, select, textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .form-row {
            display: flex;
            gap: 1rem;
            margin-bottom: 1rem;
        }
        .form-row .form-group {
            flex: 1;
            margin-bottom: 0;
        }
        .btn {
            display: inline-block;
            padding: 0.8rem 1.5rem;
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            text-align: center;
            min-width: 44px;
            min-height: 44px;
        }
        .btn:hover {
            background: #3A5A8C;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .btn-secondary {
            background: var(--secondary-color);
        }
        .btn-secondary:hover {
            background: #E55A5A;
        }
        .btn-accent {
            background: var(--accent-color);
            color: var(--text-dark);
        }
        .btn-accent:hover {
            background: #FFC145;
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star-rating {
            display: flex;
            gap: 0.2rem;
        }
        .star {
            color: #DDD;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #FFD700;
        }
        .social-share {
            display: flex;
            gap: 0.8rem;
            margin: 1.5rem 0;
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            text-decoration: none;
            transition: var(--transition);
        }
        .social-icon:hover {
            transform: translateY(-3px);
        }
        .social-icon.facebook { background: #3B5998; }
        .social-icon.twitter { background: #1DA1F2; }
        .social-icon.pinterest { background: #E60023; }
        .social-icon.reddit { background: #FF4500; }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
            box-shadow: var(--shadow);
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #3A5A8C;
            transform: translateY(-5px);
        }
        .site-footer {
            background: #2C3E50;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 4px solid var(--accent-color);
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: white;
            border-bottom: 2px solid var(--accent-color);
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            list-style: none;
        }
        .friend-links a {
            color: #DDD;
            text-decoration: none;
            transition: var(--transition);
        }
        .friend-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #445566;
            color: #AAA;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            main {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: -1;
            }
        }
        @media (max-width: 768px) {
            body {
                padding: 0 15px;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
            }
            .nav-item {
                width: 100%;
            }
            .nav-link {
                display: block;
                padding: 0.8rem 0;
                border-bottom: 1px solid var(--border-color);
            }
            .header-container {
                flex-wrap: wrap;
            }
            .form-row {
                flex-direction: column;
                gap: 0;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .social-share {
                justify-content: center;
            }
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 44px;
                height: 44px;
            }
        }
        @media (max-width: 480px) {
            .search-input {
                width: 150px;
            }
            .footer-container {
                grid-template-columns: 1fr;
            }
            .btn {
                width: 100%;
                margin-bottom: 0.5rem;
            }
        }
        @media print {
            .site-header,
            .sidebar,
            .social-share,
            .back-to-top,
            .site-footer {
                display: none !important;
            }
            body {
                max-width: 100%;
                padding: 0;
            }
            a {
                color: black !important;
                text-decoration: underline;
            }
            .btn {
                border: 1px solid black;
                background: none !important;
                color: black !important;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        :focus {
            outline: 3px solid var(--accent-color);
            outline-offset: 2px;
        }
        @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; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .py-1 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
        .py-2 { padding-top: 1rem; padding-bottom: 1rem; }
        .py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .justify-between { justify-content: space-between; }
        .flex-wrap { flex-wrap: wrap; }
        .gap-1 { gap: 0.5rem; }
        .gap-2 { gap: 1rem; }
        .gap-3 { gap: 1.5rem; }