:root {
            --primary-color: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary-color: #7c3aed;
            --accent-color: #f59e0b;
            --text-primary: #1f2937;
            --text-secondary: #4b5563;
            --bg-light: #f9fafb;
            --bg-white: #ffffff;
            --border-color: #e5e7eb;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
            --radius: 0.5rem;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--text-primary);
            background-color: var(--bg-light);
            line-height: 1.7;
            font-size: 1.0625rem;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        header {
            background-color: var(--bg-white);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
        }
        .my-logo {
            font-size: 1.875rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        .desktop-nav a {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-secondary);
            padding: 0.5rem 0;
            position: relative;
        }
        .desktop-nav a:hover {
            color: var(--primary-color);
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--bg-white);
            padding: 1rem;
            border-top: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            padding: 0.75rem 1rem;
            border-bottom: 1px solid var(--border-color);
            font-weight: 600;
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            padding: 1rem 1.5rem;
            background-color: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .breadcrumb i {
            margin: 0 0.5rem;
            color: var(--text-secondary);
            font-size: 0.8rem;
        }
        main {
            padding: 2.5rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background-color: var(--bg-white);
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        h1 {
            font-size: 2.75rem;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            color: var(--text-primary);
            font-weight: 800;
        }
        h2 {
            font-size: 2rem;
            margin-top: 3rem;
            margin-bottom: 1.25rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--border-color);
            font-weight: 700;
            color: var(--text-primary);
        }
        h3 {
            font-size: 1.5rem;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        h4 {
            font-size: 1.25rem;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            font-weight: 600;
            color: var(--text-secondary);
        }
        p {
            margin-bottom: 1.5rem;
            color: var(--text-secondary);
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: rgba(37, 99, 235, 0.08);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        strong {
            color: var(--text-primary);
            font-weight: 700;
        }
        em {
            color: var(--secondary-color);
            font-style: italic;
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
            color: var(--text-secondary);
        }
        li {
            margin-bottom: 0.5rem;
        }
        .search-box, .comment-form, .rating-form {
            background-color: var(--bg-white);
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
        }
        .search-box h3, .comment-form h3, .rating-form h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.25rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text-primary);
        }
        input, textarea, select {
            width: 100%;
            padding: 0.875rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        button, .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.875rem 2rem;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
            text-align: center;
        }
        button:hover, .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.2s;
            margin: 0;
        }
        .rating-stars label:hover,
        .rating-stars input:checked ~ label {
            color: var(--accent-color);
        }
        .featured-image {
            margin: 2.5rem 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .featured-image img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img {
            transform: scale(1.02);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-secondary);
            margin-top: 0.75rem;
            font-size: 0.95rem;
        }
        .related-links {
            background-color: var(--bg-white);
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
        }
        .related-links h3 {
            margin-top: 0;
        }
        .links-list {
            list-style: none;
            margin-left: 0;
        }
        .links-list li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        .links-list li:last-child {
            border-bottom: none;
        }
        .links-list a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 600;
        }
        .links-list i {
            color: var(--primary-color);
        }
        .update-time {
            background-color: rgba(245, 158, 11, 0.1);
            padding: 1rem;
            border-radius: var(--radius);
            margin-top: 3rem;
            text-align: center;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        footer {
            background-color: var(--text-primary);
            color: var(--bg-light);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-size: 1.875rem;
            font-weight: 800;
            background: linear-gradient(90deg, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 1rem;
        }
        .footer-section h4 {
            color: var(--bg-white);
            font-size: 1.25rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #d1d5db;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 1.5rem;
            border-radius: var(--radius);
            margin-top: 1rem;
        }
        friend-link a {
            color: #93c5fd;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #374151;
            color: #9ca3af;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container {
                padding: 1rem;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            .content-area {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2.25rem;
            }
            h2 {
                font-size: 1.75rem;
            }
            main {
                padding: 1.5rem 0;
                gap: 1.5rem;
            }
        }