:root {
            --primary-dark: #0a2e5c;
            --primary: #1a5fb4;
            --primary-light: #4a8be0;
            --accent: #f39c12;
            --accent-dark: #e67e22;
            --text: #333333;
            --text-light: #666666;
            --background: #f8f9fa;
            --surface: #ffffff;
            --border: #e0e6ed;
            --shadow: rgba(10, 46, 92, 0.08);
            --success: #27ae60;
            --warning: #f1c40f;
            --danger: #e74c3c;
            --radius: 8px;
            --transition: all 0.3s ease;
            --header-height: 80px;
            --max-width: 1280px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--background);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--surface);
            box-shadow: 0 4px 12px var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        .my-logo {
            font-family: 'Trebuchet MS', sans-serif;
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-dark);
            text-transform: uppercase;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-list a {
            font-weight: 600;
            color: var(--text);
            padding: 8px 0;
            position: relative;
        }
        .nav-list a:hover {
            color: var(--primary);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent);
            transition: var(--transition);
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--background);
            border-radius: 50px;
            padding: 8px 15px;
            border: 1px solid var(--border);
        }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            padding: 5px 10px;
            width: 200px;
            font-size: 0.95rem;
        }
        .search-box button {
            background: none;
            border: none;
            color: var(--primary);
            cursor: pointer;
            font-size: 1.1rem;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--primary-dark);
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #f1f5f9;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.9rem;
        }
        .breadcrumb-list li {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .breadcrumb-list li:not(:last-child)::after {
            content: '>';
            color: var(--text-light);
            font-size: 0.8rem;
        }
        .breadcrumb-list a {
            color: var(--text-light);
        }
        .breadcrumb-list a:hover {
            color: var(--primary);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: var(--surface);
            padding: 40px;
            border-radius: var(--radius);
            box-shadow: 0 5px 15px var(--shadow);
        }
        .article-header {
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 2px solid var(--border);
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--primary-dark);
            margin-bottom: 15px;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .meta-info span i {
            margin-right: 5px;
            color: var(--primary);
        }
        .article-body {
            font-size: 1.1rem;
        }
        .article-body h2 {
            font-size: 2rem;
            color: var(--primary-dark);
            margin: 50px 0 20px;
            padding-bottom: 10px;
            border-bottom: 1px dashed var(--border);
        }
        .article-body h3 {
            font-size: 1.6rem;
            color: var(--primary);
            margin: 40px 0 15px;
        }
        .article-body h4 {
            font-size: 1.3rem;
            color: var(--text);
            margin: 30px 0 10px;
        }
        .article-body p {
            margin-bottom: 25px;
            text-align: justify;
        }
        .article-body emoji {
            font-size: 1.2em;
            margin: 0 3px;
        }
        .article-body strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 20px 30px;
            margin: 30px 0;
            background-color: #fef9e7;
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body img.featured {
            width: 100%;
            border-radius: var(--radius);
            margin: 30px auto;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            border: 1px solid var(--border);
        }
        .article-body ul, .article-body ol {
            margin-left: 30px;
            margin-bottom: 25px;
        }
        .article-body li {
            margin-bottom: 10px;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            border: 1px solid var(--primary-light);
            border-radius: var(--radius);
            padding: 25px;
            margin: 30px 0;
            position: relative;
            overflow: hidden;
        }
        .highlight-box::before {
            content: '💡';
            position: absolute;
            top: 15px;
            right: 15px;
            font-size: 2rem;
            opacity: 0.2;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: var(--surface);
            padding: 25px;
            border-radius: var(--radius);
            box-shadow: 0 5px 15px var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: var(--primary-dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }
        .link-list {
            list-style: none;
        }
        .link-list li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed var(--border);
        }
        .link-list li:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        .link-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
        }
        .link-list a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        .link-list i {
            color: var(--primary-light);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--text);
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
            background: var(--background);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 95, 180, 0.1);
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(26, 95, 180, 0.3);
        }
        .btn-accent {
            background: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: var(--warning);
        }
        .site-footer {
            background: var(--primary-dark);
            color: #cbd5e1;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
        }
        @media (max-width: 768px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        .footer-logo {
            font-family: 'Trebuchet MS', sans-serif;
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 20px;
            display: block;
        }
        .footer-widget h4 {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-widget h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--accent);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #cbd5e1;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            padding: 15px;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius);
            margin-bottom: 15px;
            text-align: center;
            font-weight: 600;
        }
        friend-link a {
            color: white;
        }
        friend-link a:hover {
            color: var(--accent);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            html { font-size: 15px; }
            .header-container { padding: 0 15px; }
            .main-nav { display: none; }
            .hamburger { display: block; }
            .nav-list {
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: var(--surface);
                padding: 20px;
                box-shadow: 0 10px 20px var(--shadow);
                gap: 0;
            }
            .nav-list li {
                width: 100%;
                border-bottom: 1px solid var(--border);
            }
            .nav-list a {
                display: block;
                padding: 15px;
            }
            .nav-list.active {
                display: flex;
            }
            .search-box input { width: 150px; }
            .article-content { padding: 25px; }
            .article-header h1 { font-size: 2.2rem; }
            .footer-container { gap: 30px; }
        }