* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #202122;
            background-color: #f6f6f6;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: #fff;
            border-bottom: 1px solid #a2a9b1;
            padding: 20px 0;
            margin-bottom: 30px;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 700;
            color: #0066cc;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #0052a3;
        }
        .my-logo::before {
            content: "🌍";
            font-size: 2rem;
        }
        nav {
            flex-grow: 1;
        }
        .nav-desktop {
            display: flex;
            justify-content: flex-end;
            gap: 25px;
            list-style: none;
        }
        .nav-desktop a {
            color: #3366cc;
            text-decoration: none;
            font-weight: 500;
            padding: 10px 15px;
            border-radius: 4px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .nav-desktop a:hover {
            background-color: #f8f9fa;
            color: #2244aa;
        }
        .nav-desktop a.active {
            background-color: #eaf3ff;
            color: #0066cc;
            font-weight: 600;
        }
        .hamburger-menu {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 10px;
            color: #0066cc;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            width: 100%;
            margin-top: 20px;
            background: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            overflow: hidden;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 15px 20px;
            text-decoration: none;
            color: #3366cc;
            border-bottom: 1px solid #f0f0f0;
            transition: background-color 0.3s ease;
        }
        .nav-mobile a:hover {
            background-color: #f8f9fa;
        }
        .search-container {
            margin: 20px 0 30px;
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }
        .search-form {
            display: flex;
            gap: 10px;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 12px 16px;
            border: 2px solid #a2a9b1;
            border-radius: 4px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .search-input:focus {
            outline: none;
            border-color: #0066cc;
            box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
        }
        .search-button {
            background-color: #0066cc;
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s ease;
            min-width: 44px;
            min-height: 44px;
        }
        .search-button:hover {
            background-color: #0052a3;
        }
        main {
            background: white;
            border-radius: 8px;
            padding: 30px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
            margin-bottom: 30px;
        }
        h1 {
            font-size: 2.5rem;
            color: #000;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 1px solid #a2a9b1;
            font-weight: 700;
        }
        h2 {
            font-size: 1.8rem;
            color: #000;
            margin: 35px 0 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eaecf0;
            font-weight: 600;
        }
        h3 {
            font-size: 1.4rem;
            color: #202122;
            margin: 25px 0 15px;
            font-weight: 600;
        }
        h4 {
            font-size: 1.2rem;
            color: #54595d;
            margin: 20px 0 10px;
            font-weight: 600;
        }
        p {
            margin-bottom: 16px;
            line-height: 1.7;
        }
        section {
            margin-bottom: 40px;
        }
        .content-box {
            background: #f8f9fa;
            border-left: 4px solid #0066cc;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .pro-tip {
            background: #fff8e1;
            border-left: 4px solid #ffc107;
            padding: 18px;
            margin: 20px 0;
            border-radius: 0 6px 6px 0;
            font-style: italic;
        }
        .info-table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
        }
        .info-table th {
            background-color: #f8f9fa;
            font-weight: 600;
            text-align: left;
            padding: 15px;
            border-bottom: 2px solid #eaecf0;
        }
        .info-table td {
            padding: 15px;
            border-bottom: 1px solid #eaecf0;
        }
        .info-table tr:hover {
            background-color: #f8f9fa;
        }
        ul, ol {
            margin: 15px 0 15px 30px;
        }
        li {
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .article-image {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 25px 0;
            display: block;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .image-caption {
            text-align: center;
            font-size: 0.9rem;
            color: #54595d;
            margin-top: -15px;
            margin-bottom: 25px;
            font-style: italic;
        }
        .interactive-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 30px;
            border-radius: 12px;
            margin: 40px 0;
        }
        .rating-container {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 500px;
            margin: 30px auto;
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.1);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 15px 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s ease;
            user-select: none;
            min-width: 44px;
            min-height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .submit-rating {
            background: #0066cc;
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
            min-width: 44px;
            min-height: 44px;
        }
        .submit-rating:hover {
            background: #0052a3;
        }
        .comments-container {
            margin: 40px 0;
            background: #f8f9fa;
            padding: 30px;
            border-radius: 10px;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-bottom: 30px;
        }
        .comment-input, .comment-textarea {
            padding: 12px;
            border: 1px solid #a2a9b1;
            border-radius: 6px;
            font-size: 1rem;
            font-family: inherit;
        }
        .comment-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-comment {
            align-self: flex-start;
            background: #0066cc;
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
            min-width: 44px;
            min-height: 44px;
        }
        .submit-comment:hover {
            background: #0052a3;
        }
        .social-sharing {
            position: fixed;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            display: flex;
            flex-direction: column;
            gap: 15px;
            z-index: 100;
        }
        .social-button {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }
        .social-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.25);
        }
        .twitter {
            background: #1DA1F2;
        }
        .facebook {
            background: #4267B2;
        }
        .reddit {
            background: #FF5700;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: #0066cc;
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            font-size: 1.5rem;
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 100;
            box-shadow: 0 4px 12px rgba(0,102,204,0.3);
            transition: all 0.3s ease;
        }
        .back-to-top:hover {
            background: #0052a3;
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(0,102,204,0.4);
        }
        .back-to-top.show {
            display: flex;
        }
        footer {
            background: #f8f9fa;
            padding: 40px 20px;
            border-top: 1px solid #a2a9b1;
            margin-top: 50px;
            border-radius: 8px 8px 0 0;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-section h3 {
            color: #202122;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links a {
            color: #3366cc;
            text-decoration: none;
            display: block;
            padding: 8px 0;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: #2244aa;
            text-decoration: underline;
        }
        .contact-info {
            line-height: 1.8;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid #d0d0d0;
            color: #54595d;
            font-size: 0.9rem;
        }
        .last-updated {
            background: #eaf3ff;
            padding: 15px;
            border-radius: 6px;
            margin: 20px 0;
            text-align: center;
            font-size: 0.95rem;
            color: #0066cc;
            font-weight: 500;
        }
        @media (max-width: 1024px) {
            .social-sharing {
                position: static;
                flex-direction: row;
                justify-content: center;
                margin: 30px 0;
                transform: none;
            }
        }
        @media (max-width: 768px) {
            body {
                padding: 0 15px;
            }
            .header-container {
                flex-direction: column;
                align-items: stretch;
                gap: 15px;
            }
            .my-logo {
                font-size: 2rem;
                justify-content: center;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger-menu {
                display: block;
                position: absolute;
                right: 10px;
                top: 20px;
            }
            h1 {
                font-size: 2rem;
                margin-top: 20px;
            }
            h2 {
                font-size: 1.5rem;
            }
            main {
                padding: 20px 15px;
            }
            .info-table {
                display: block;
                overflow-x: auto;
            }
            .footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 44px;
                height: 44px;
            }
        }
        @media (max-width: 480px) {
            .search-form {
                flex-direction: column;
            }
            .search-button {
                width: 100%;
            }
            .rating-container {
                padding: 20px 15px;
            }
            .star {
                font-size: 1.5rem;
            }
            .interactive-section {
                padding: 20px 15px;
            }
        }
        .text-center {
            text-align: center;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .mt-30 {
            margin-top: 30px;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 2px 6px;
            border-radius: 3px;
            font-weight: 500;
        }