* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        h1, h2, h3, h4 {
            font-family: 'Georgia', serif;
            color: #1a365d;
            margin-bottom: 1.2rem;
            font-weight: 700;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            margin-top: 1.5rem;
            border-bottom: 4px solid #2b6cb0;
            padding-bottom: 0.8rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 3rem;
            padding-left: 10px;
            border-left: 5px solid #4299e1;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2.5rem;
            color: #2d3748;
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 2rem;
            color: #4a5568;
        }
        p {
            margin-bottom: 1.8rem;
            text-align: justify;
            font-size: 1.125rem;
        }
        .container {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        @media (min-width: 992px) {
            .container {
                grid-template-columns: 1fr 300px;
            }
        }
        header {
            background: linear-gradient(90deg, #1a365d 0%, #2b6cb0 100%);
            color: white;
            padding: 1.2rem 0;
            border-radius: 0 0 12px 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
            color: #90cdf4;
        }
        .my-logo i {
            font-size: 2.5rem;
            color: #63b3ed;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: #e2e8f0;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        nav a:hover, nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: white;
            transform: translateY(-2px);
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.95rem;
            color: #718096;
            margin-top: 1rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .breadcrumb a {
            color: #4299e1;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 0;
            border-bottom: 1px solid #e2e8f0;
            margin-bottom: 2.5rem;
            color: #718096;
            font-size: 0.95rem;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .update-time {
            background: #ebf8ff;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 600;
            color: #2b6cb0;
        }
        .highlight-box {
            background: linear-gradient(135deg, #ebf8ff 0%, #bee3f8 100%);
            border-left: 5px solid #4299e1;
            padding: 1.8rem;
            margin: 2.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .key-point {
            font-weight: 700;
            color: #2b6cb0;
            background: #e6fffa;
            padding: 0.3rem 0.8rem;
            border-radius: 4px;
            display: inline-block;
            margin: 0.5rem 0;
        }
        emoji {
            font-size: 1.3em;
            margin-right: 8px;
            vertical-align: middle;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 2.5rem auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            transition: transform 0.5s ease, box-shadow 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
        }
        aside {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            color: #2d3748;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #cbd5e0;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .search-form input:focus {
            outline: none;
            border-color: #4299e1;
        }
        .search-form button {
            background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 600;
        }
        .search-form button:hover {
            background: linear-gradient(135deg, #3182ce 0%, #2b6cb0 100%);
            transform: translateY(-1px);
        }
        .rating-form, .comment-form {
            background: #f7fafc;
            padding: 1.8rem;
            border-radius: 10px;
            border: 1px solid #e2e8f0;
        }
        .rating-form h4, .comment-form h4 {
            margin-top: 0;
            margin-bottom: 1.2rem;
        }
        .stars {
            display: flex;
            gap: 8px;
            margin-bottom: 1.5rem;
            justify-content: center;
        }
        .star {
            font-size: 2rem;
            color: #cbd5e0;
            cursor: pointer;
            transition: color 0.2s ease, transform 0.2s ease;
        }
        .star:hover,
        .star.active {
            color: #f6e05e;
            transform: scale(1.2);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #4a5568;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.9rem;
            border: 2px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #4299e1;
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(135deg, #38a169 0%, #2f855a 100%);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            width: 100%;
            transition: all 0.3s ease;
        }
        .submit-btn:hover {
            background: linear-gradient(135deg, #2f855a 0%, #276749 100%);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(56, 161, 105, 0.3);
        }
        .related-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 3rem 0;
        }
        .related-link {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.06);
            transition: all 0.3s ease;
            border: 1px solid #e2e8f0;
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .related-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            border-color: #4299e1;
        }
        .related-link h4 {
            margin-top: 0;
            margin-bottom: 0.8rem;
            color: #2b6cb0;
            font-size: 1.2rem;
        }
        .related-link p {
            font-size: 0.95rem;
            margin-bottom: 0;
            color: #718096;
        }
        footer {
            background: #1a202c;
            color: #cbd5e0;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
            border-radius: 12px 12px 0 0;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            padding: 0 2rem;
        }
        .footer-section h3 {
            color: #e2e8f0;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #4a5568;
        }
        friend-link {
            display: block;
            margin-bottom: 1rem;
        }
        friend-link a {
            color: #90cdf4;
            text-decoration: none;
            transition: color 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            main {
                padding: 1.8rem;
            }
            .header-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .hamburger {
                display: block;
                position: absolute;
                right: 20px;
                top: 20px;
            }
            nav {
                width: 100%;
                display: none;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 0.8rem;
                padding-top: 1rem;
            }
            .related-links {
                grid-template-columns: 1fr;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media print {
            header, aside, footer, .article-meta, .highlight-box, .related-links {
                display: none;
            }
            body {
                background: white;
                color: black;
                max-width: 100%;
            }
            main {
                box-shadow: none;
                padding: 0;
            }
            h1, h2, h3, h4 {
                color: black;
            }
        }