:root {
            --primary: #2563eb; 
            --secondary: #7c3aed; 
            --accent: #f59e0b; 
            --dark: #1e293b; 
            --light: #f8fafc; 
            --gray: #64748b; 
            --success: #10b981; 
            --border-radius: 12px;
            --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: var(--light);
            max-width: 100vw;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark) 0%, #0f172a 100%);
            color: white;
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent);
            font-size: 2.5rem;
        }
        .main-nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background-color: #e2e8f0;
            font-size: 0.9rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
        }
        .main-container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background: white;
            padding: 3rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 3.2rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--accent);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.5rem;
            border-left: 5px solid var(--secondary);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--dark);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--gray);
            font-weight: 500;
            margin-bottom: 2rem;
        }
        strong {
            color: var(--dark);
            font-weight: 700;
        }
        em {
            color: var(--secondary);
            font-style: italic;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .content-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--primary);
            transition: var(--transition);
        }
        .content-link:hover {
            color: var(--secondary);
            border-bottom-style: solid;
        }
        .feature-img {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 2.5rem auto;
            box-shadow: var(--shadow);
            display: block;
            transition: transform 0.5s ease;
        }
        .feature-img:hover {
            transform: scale(1.015);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            padding: 1.8rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            color: var(--dark);
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.7rem;
        }
        .search-box form {
            display: flex;
        }
        .search-box input {
            flex-grow: 1;
            padding: 0.9rem 1rem;
            border: 2px solid #cbd5e1;
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-box button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--secondary);
        }
        .rating-widget .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #d1d5db;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star.active,
        .star:hover {
            color: var(--accent);
        }
        .rating-form input,
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-family: inherit;
        }
        .rating-form button,
        .comment-form button {
            width: 100%;
            padding: 0.9rem;
            background: var(--success);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-form button:hover,
        .comment-form button:hover {
            background: #0da271;
        }
        .comment-list {
            max-height: 400px;
            overflow-y: auto;
            padding-right: 0.5rem;
        }
        .comment {
            background: #f8fafc;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            border-left: 4px solid var(--primary);
        }
        .comment-author {
            font-weight: 700;
            color: var(--dark);
            display: flex;
            justify-content: space-between;
        }
        .comment-date {
            font-size: 0.8rem;
            color: var(--gray);
        }
        .comment-text {
            margin-top: 0.5rem;
        }
        .update-time {
            background: #dbeafe;
            padding: 1rem;
            border-radius: var(--border-radius);
            text-align: center;
            margin-top: 3rem;
            font-size: 0.95rem;
            color: var(--dark);
        }
        .update-time i {
            color: var(--primary);
            margin-right: 0.5rem;
        }
        .site-footer {
            background: var(--dark);
            color: #cbd5e1;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            display: block;
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background: #334155;
            padding: 1.2rem;
            border-radius: 8px;
            margin: 0.5rem 0;
            transition: var(--transition);
        }
        friend-link a {
            color: #e2e8f0 !important;
            font-weight: 600;
            text-decoration: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        friend-link:hover {
            background: #475569;
            transform: translateY(-3px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #475569;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            h1 {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                padding: 1rem;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--dark);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                gap: 0;
                border-top: 1px solid #334155;
            }
            .main-nav ul.active {
                display: flex;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-radius: 8px;
            }
            .mobile-toggle {
                display: block;
            }
            .main-container {
                padding: 0 1rem;
            }
            article {
                padding: 2rem 1.5rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }