* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #2c5282;
            text-decoration: none;
            transition: color 0.3s ease, background-color 0.3s ease;
        }
        a:hover {
            color: #1a365d;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 2rem;
            margin-bottom: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        h1, h2, h3, h4 {
            font-family: Georgia, 'Times New Roman', Times, serif;
            color: #1a202c;
            margin-bottom: 1rem;
            font-weight: 700;
            line-height: 1.3;
        }
        h1 {
            font-size: clamp(2.2rem, 5vw, 3.5rem);
            border-bottom: 4px solid #e53e3e;
            padding-bottom: 0.5rem;
            margin-top: 1.5rem;
            margin-bottom: 2rem;
        }
        h2 {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            color: #2d3748;
            margin-top: 2.5rem;
            padding-left: 0.5rem;
            border-left: 5px solid #4299e1;
        }
        h3 {
            font-size: clamp(1.4rem, 3vw, 1.8rem);
            color: #4a5568;
            margin-top: 2rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #718096;
            margin-top: 1.5rem;
        }
        strong, b {
            font-weight: 700;
            color: #2d3748;
        }
        em {
            font-style: italic;
            color: #555;
        }
        blockquote {
            border-left: 4px solid #cbd5e0;
            padding: 1rem 1.5rem;
            margin: 2rem 0;
            background-color: #edf2f7;
            font-style: italic;
            border-radius: 0 8px 8px 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        @media (min-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr 300px;
            }
        }
        .site-header {
            background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
            color: white;
            padding: 1rem 0;
            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-family: 'Trebuchet MS', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #fbd38d;
        }
        .my-logo i {
            color: #e53e3e;
            font-size: 2.5rem;
        }
        .nav-desktop {
            display: none;
        }
        @media (min-width: 768px) {
            .nav-desktop {
                display: flex;
                gap: 1.8rem;
            }
        }
        .nav-desktop a {
            color: #cbd5e0;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
        }
        .nav-desktop a:hover {
            color: white;
            background-color: rgba(255, 255, 255, 0.1);
            text-decoration: none;
        }
        .hamburger-btn {
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            display: block;
        }
        @media (min-width: 768px) {
            .hamburger-btn {
                display: none;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 0;
            right: -100%;
            height: 100vh;
            width: 280px;
            background-color: #2d3748;
            padding: 2rem;
            transition: right 0.4s ease-in-out;
            z-index: 1100;
            overflow-y: auto;
            box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
        }
        .mobile-nav.active {
            right: 0;
        }
        .mobile-nav a {
            display: block;
            color: #e2e8f0;
            padding: 0.8rem 0;
            border-bottom: 1px solid #4a5568;
            font-size: 1.1rem;
        }
        .mobile-nav a:hover {
            color: #fbd38d;
        }
        .close-nav {
            background: none;
            border: none;
            color: #cbd5e0;
            font-size: 1.8rem;
            position: absolute;
            top: 1rem;
            right: 1.5rem;
            cursor: pointer;
        }
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1050;
            display: none;
        }
        .overlay.active {
            display: block;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #edf2f7;
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        .breadcrumb a:hover {
            color: #2d3748;
        }
        .breadcrumb span {
            color: #718096;
            margin: 0 5px;
        }
        .breadcrumb .current {
            color: #2d3748;
            font-weight: 600;
        }
        .main-content {
            background-color: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            padding-bottom: 1.5rem;
            margin-bottom: 2rem;
            border-bottom: 1px solid #e2e8f0;
            color: #718096;
            font-size: 0.95rem;
        }
        .update-time {
            background-color: #e6fffa;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            color: #234e52;
        }
        .featured-image {
            margin: 2.5rem auto;
            text-align: center;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            max-width: 800px;
        }
        .featured-image img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img {
            transform: scale(1.02);
        }
        .image-caption {
            font-style: italic;
            color: #718096;
            padding: 0.75rem;
            background-color: #f7fafc;
            font-size: 0.9rem;
        }
        .internal-link-highlight {
            background-color: #fefcbf;
            padding: 2px 4px;
            border-radius: 3px;
            font-weight: 600;
        }
        .sidebar {
            background-color: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            align-self: start;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e53e3e;
            color: #2d3748;
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: #4299e1;
            color: white;
            border: none;
            padding: 0.8rem 1.2rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .search-form button:hover {
            background-color: #3182ce;
        }
        .link-list {
            list-style: none;
            padding-left: 0;
        }
        .link-list li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #e2e8f0;
        }
        .link-list li:last-child {
            border-bottom: none;
        }
        .link-list a {
            display: block;
            padding: 0.5rem;
            border-radius: 4px;
        }
        .link-list a:hover {
            background-color: #edf2f7;
            text-decoration: none;
        }
        .interaction-form {
            background-color: #f7fafc;
            padding: 1.8rem;
            border-radius: 10px;
            margin: 3rem 0;
            border: 1px solid #e2e8f0;
        }
        .interaction-form h3 {
            margin-top: 0;
            color: #2d3748;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .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: 0.8rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
            font-family: inherit;
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #cbd5e0;
            cursor: pointer;
            margin-bottom: 1rem;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: #f6ad55;
        }
        .submit-btn {
            background: linear-gradient(to right, #e53e3e, #dd6b20);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, #c53030, #c05621);
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        .site-footer {
            background-color: #1a202c;
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-widget h4 {
            color: #fbd38d;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            border-bottom: none;
            padding-left: 0;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        friend-link {
            display: inline-block;
            background-color: #2d3748;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.9rem;
        }
        friend-link a {
            color: #90cdf4;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 767px) {
            .header-container, .footer-container {
                flex-direction: column;
                text-align: center;
                gap: 1rem;
            }
            .main-content, .sidebar {
                padding: 1.5rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .interaction-form {
                padding: 1.2rem;
            }
        }