:root {
            --primary-blue: #1a5fb4;
            --primary-purple: #9141ac;
            --dark-bg: #0f1419;
            --content-bg: #ffffff;
            --card-bg: #f8f9fa;
            --text-primary: #222222;
            --text-secondary: #5f6368;
            --accent-yellow: #f6b92b;
            --border-color: #dadce0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--content-bg);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--primary-blue);
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-purple);
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1c2b3a 100%);
            color: white;
            padding: 1.2rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #f6b92b, #ff7a45);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.5px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: #e3e3e3;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-desktop a:hover {
            color: white;
            border-bottom-color: var(--accent-yellow);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: var(--dark-bg);
            padding: 2rem;
            transition: right 0.4s ease;
            z-index: 1001;
            box-shadow: -5px 0 25px rgba(0,0,0,0.3);
        }
        .mobile-nav.active {
            right: 0;
        }
        .mobile-nav a {
            display: block;
            color: #ddd;
            padding: 1rem 0;
            border-bottom: 1px solid #333;
            font-size: 1.2rem;
        }
        .mobile-nav a:hover {
            color: var(--accent-yellow);
        }
        .close-nav {
            background: none;
            border: none;
            color: #aaa;
            font-size: 2rem;
            position: absolute;
            top: 1rem;
            right: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--card-bg);
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary-blue);
        }
        .breadcrumb span {
            color: var(--text-secondary);
            margin: 0 8px;
        }
        .main-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 3rem;
            margin: 3rem auto;
        }
        @media (max-width: 1024px) {
            .main-layout {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--dark-bg);
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .meta-info i {
            margin-right: 6px;
            color: var(--primary-blue);
        }
        h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            color: var(--dark-bg);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-yellow);
        }
        h3 {
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
            color: var(--primary-purple);
        }
        h4 {
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
            color: var(--primary-blue);
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--text-primary);
            background: linear-gradient(to right, #f8f9fa, #ffffff);
            padding: 1.5rem;
            border-left: 5px solid var(--accent-yellow);
            border-radius: 0 var(--radius) var(--radius) 0;
            margin-bottom: 2.5rem;
        }
        .highlight-box {
            background-color: #f0f7ff;
            border: 1px solid #c2e0ff;
            padding: 1.8rem;
            border-radius: var(--radius);
            margin: 2rem 0;
        }
        .highlight-box h4 {
            margin-top: 0;
            color: var(--primary-blue);
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .feature-img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            transition: transform 0.5s ease;
        }
        .feature-img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-top: 0.8rem;
            font-style: italic;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.7rem;
        }
        strong {
            color: var(--primary-blue);
            font-weight: 700;
        }
        em {
            color: var(--primary-purple);
            font-style: italic;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.8rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            margin-bottom: 1.2rem;
            color: var(--dark-bg);
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .sidebar-widget h3 i {
            color: var(--accent-yellow);
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 1px solid var(--border-color);
            border-right: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-btn:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }
        .rating-container {
            text-align: center;
        }
        .stars {
            font-size: 2.2rem;
            color: #ddd;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars .star {
            margin: 0 3px;
            transition: var(--transition);
        }
        .stars .star:hover,
        .stars .star.active {
            color: var(--accent-yellow);
        }
        .rating-form input, .rating-form button {
            width: 100%;
            padding: 0.9rem;
            margin-top: 1rem;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
        }
        .rating-form button {
            background-color: var(--primary-blue);
            color: white;
            border: none;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: var(--primary-purple);
        }
        .related-links a {
            display: block;
            padding: 0.9rem 1rem;
            margin-bottom: 0.8rem;
            background-color: var(--card-bg);
            border-radius: var(--radius);
            border-left: 4px solid var(--primary-blue);
            transition: var(--transition);
        }
        .related-links a:hover {
            background-color: #e8f0fe;
            transform: translateX(5px);
        }
        .comment-section {
            margin-top: 4rem;
            padding-top: 2.5rem;
            border-top: 2px solid var(--border-color);
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            margin-bottom: 3rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text-primary);
        }
        .form-group input,
        .form-group textarea {
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            font-size: 1rem;
            font-family: inherit;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(26, 95, 180, 0.1);
        }
        .submit-btn {
            background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
            color: white;
            border: none;
            padding: 1.2rem;
            border-radius: var(--radius);
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            opacity: 0.9;
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(145, 65, 172, 0.2);
        }
        .site-footer {
            background-color: var(--dark-bg);
            color: #b0b7c3;
            padding: 3.5rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-section h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.7rem;
            border-bottom: 2px solid var(--accent-yellow);
            display: inline-block;
        }
        .footer-links a {
            display: block;
            color: #b0b7c3;
            padding: 0.5rem 0;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 8px;
        }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.05);
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            border: 1px solid #333;
            transition: var(--transition);
        }
        friend-link a {
            color: #ddd;
        }
        friend-link:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--accent-yellow);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #333;
            font-size: 0.95rem;
            color: #888;
        }
        .last-updated {
            background-color: #fff8e1;
            padding: 1rem;
            border-radius: var(--radius);
            border-left: 5px solid var(--accent-yellow);
            margin: 2rem 0;
            font-weight: 600;
        }
        .last-updated i {
            color: var(--accent-yellow);
            margin-right: 10px;
        }
        .tag {
            display: inline-block;
            background: linear-gradient(90deg, #e3f2fd, #f3e5f5);
            color: var(--primary-purple);
            padding: 0.4rem 1rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-right: 0.7rem;
            margin-bottom: 0.7rem;
        }
        @media (max-width: 768px) {
            .article-content {
                padding: 1.8rem;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .main-layout {
                margin: 1.5rem auto;
            }
            .sidebar-widget {
                padding: 1.5rem;
            }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .article-content, .sidebar-widget {
            animation: fadeInUp 0.6s ease-out;
        }