* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2563eb;
            --secondary-color: #1e40af;
            --accent-color: #3b82f6;
            --text-color: #1f2937;
            --light-bg: #f8fafc;
            --border-color: #e5e7eb;
            --success-color: #10b981;
            --warning-color: #f59e0b;
            --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
        }
        body {
            font-family: var(--font-main);
            color: var(--text-color);
            line-height: 1.7;
            background-color: #ffffff;
        }
        .site-header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo:hover {
            color: var(--secondary-color);
        }
        .my-logo span {
            color: var(--text-color);
            font-weight: 400;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-links {
            display: flex;
            gap: 1.5rem;
            list-style: none;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-color);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            transition: color 0.3s ease;
        }
        .nav-links a:hover {
            color: var(--primary-color);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-color);
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 1rem 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-container {
            max-width: 1280px;
            margin: 0 auto;
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            gap: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb-list li {
            display: flex;
            align-items: center;
        }
        .breadcrumb-list a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb-list a:hover {
            text-decoration: underline;
        }
        .breadcrumb-list i {
            margin: 0 0.5rem;
            color: #9ca3af;
            font-size: 0.8rem;
        }
        .main-container {
            max-width: 1280px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        .article-content {
            background-color: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--text-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            font-weight: 800;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
            font-weight: 700;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--text-color);
            margin: 2rem 0 1rem;
            font-weight: 600;
        }
        h4 {
            font-size: 1.2rem;
            color: #4b5563;
            margin: 1.5rem 0 0.75rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.25rem;
            color: #4b5563;
            font-weight: 500;
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: var(--light-bg);
            border-left: 4px solid var(--primary-color);
            border-radius: 0 8px 8px 0;
        }
        strong {
            color: var(--secondary-color);
            font-weight: 600;
        }
        em {
            color: #6b7280;
            font-style: italic;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #6b7280;
            margin-top: -1.5rem;
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background-color: var(--light-bg);
            padding: 1.5rem;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            border-color: var(--primary-color);
        }
        .feature-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .widget {
            background-color: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
            margin-bottom: 2rem;
            border: 1px solid var(--border-color);
        }
        .widget h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: var(--secondary-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form {
            display: flex;
            margin-bottom: 2rem;
        }
        .search-input {
            flex: 1;
            padding: 0.75rem 1rem;
            border: 2px solid var(--border-color);
            border-right: none;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        .search-button:hover {
            background-color: var(--secondary-color);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .star:hover,
        .star.active {
            color: var(--warning-color);
        }
        .rating-count {
            font-size: 0.9rem;
            color: #6b7280;
            margin-top: 0.5rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-family: var(--font-main);
            font-size: 1rem;
            margin-bottom: 1rem;
            resize: vertical;
            min-height: 120px;
            transition: border-color 0.3s ease;
        }
        .comment-form textarea:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .comment-submit {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }
        .comment-submit:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            padding-left: 1rem;
            position: relative;
        }
        .related-links li::before {
            content: '→';
            position: absolute;
            left: 0;
            color: var(--primary-color);
        }
        .related-links a {
            color: var(--text-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .related-links a:hover {
            color: var(--primary-color);
        }
        .site-footer {
            background-color: #111827;
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 0.5rem;
            display: inline-block;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #d1d5db;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1rem 0;
            padding: 1rem;
            background-color: #1f2937;
            border-radius: 8px;
        }
        friend-link a {
            color: var(--accent-color);
            text-decoration: none;
            padding: 0.5rem 1rem;
            background-color: #374151;
            border-radius: 6px;
            transition: all 0.3s ease;
        }
        friend-link a:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }
        .copyright {
            text-align: center;
            padding: 2rem;
            border-top: 1px solid #374151;
            margin-top: 3rem;
            color: #9ca3af;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #fef3c7;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            border-left: 4px solid var(--warning-color);
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: white;
                flex-direction: column;
                align-items: center;
                padding: 2rem;
                transition: left 0.3s ease;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            }
            .nav-links.active {
                left: 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .main-container {
                padding: 0 1rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .footer-container {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }
        .text-center {
            text-align: center;
        }
        .mb-3 {
            margin-bottom: 3rem;
        }
        .mt-3 {
            margin-top: 3rem;
        }
        .py-2 {
            padding-top: 2rem;
            padding-bottom: 2rem;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }