:root {
            --primary-color: #4A6FA5; 
            --secondary-color: #FF9933; 
            --accent-color: #66BB6A; 
            --dark-color: #333344;
            --light-color: #F8F9FA;
            --text-color: #222;
            --text-light: #666;
            --border-radius: 12px;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --max-width: 1280px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }
        .my-logo i {
            color: var(--secondary-color);
            margin-right: 10px;
        }
        .my-logo:hover {
            color: var(--secondary-color);
        }
        .main-nav ul {
            display: flex;
            gap: 30px;
        }
        .main-nav a {
            font-weight: 600;
            padding: 8px 5px;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary-color);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after,
        .main-nav a.active::after {
            width: 100%;
        }
        .main-nav a:hover {
            color: var(--primary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary-color);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #f0f2f5;
            padding: 12px 0;
            margin-bottom: 30px;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark-color);
            margin-bottom: 25px;
            line-height: 1.2;
            border-bottom: 4px solid var(--accent-color);
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin-top: 40px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px dashed #eee;
        }
        h3 {
            font-size: 1.6rem;
            color: var(--secondary-color);
            margin-top: 30px;
            margin-bottom: 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--accent-color);
            margin-top: 25px;
            margin-bottom: 12px;
        }
        p {
            margin-bottom: 22px;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 500;
            color: var(--text-light);
            background: #f8f9fa;
            padding: 20px;
            border-left: 5px solid var(--primary-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 35px;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--secondary-color);
            margin: 25px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        em {
            font-style: italic;
            color: #555;
        }
        strong {
            font-weight: 700;
            color: var(--dark-color);
        }
        .intro-emoji {
            font-size: 1.5rem;
            margin-right: 10px;
        }
        .content-link {
            color: var(--primary-color);
            font-weight: 600;
            border-bottom: 1px dotted var(--primary-color);
        }
        .content-link:hover {
            color: var(--secondary-color);
            border-bottom-style: solid;
        }
        figure {
            margin: 35px 0;
            text-align: center;
        }
        figcaption {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 10px;
            font-style: italic;
        }
        .float-right {
            float: right;
            margin-left: 30px;
            margin-bottom: 20px;
            max-width: 50%;
        }
        @media (max-width: 768px) {
            .float-right {
                float: none;
                margin: 25px auto;
                max-width: 100%;
            }
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-widget {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            color: var(--dark-color);
            border-bottom: 2px solid #eee;
            padding-bottom: 10px;
            margin-bottom: 20px;
        }
        .search-form,
        .comment-form,
        .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--dark-color);
        }
        input,
        select,
        textarea {
            padding: 14px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        button,
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: var(--border-radius);
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            display: inline-block;
        }
        button:hover,
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 0, 0, 0.1);
        }
        .stars {
            display: flex;
            gap: 10px;
            justify-content: center;
            margin: 15px 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: gold;
        }
        .related-links ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .related-links li {
            padding: 12px 15px;
            background: #f8f9fa;
            border-radius: 8px;
            border-left: 4px solid var(--accent-color);
        }
        .related-links a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }
        @media (max-width: 768px) {
            .footer-container {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 20px;
            display: inline-block;
        }
        .footer-widget h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(255, 255, 255, 0.1);
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        friend-link {
            background: rgba(255, 255, 255, 0.1);
            padding: 10px 20px;
            border-radius: 30px;
            display: inline-block;
        }
        friend-link a:hover {
            color: var(--secondary-color);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #aaa;
        }
        .last-updated {
            font-size: 0.9rem;
            color: var(--text-light);
            text-align: right;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #eee;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background: white;
                box-shadow: var(--shadow);
                padding: 20px;
                transition: left 0.4s ease;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid #eee;
            }
            .main-nav a {
                display: block;
                padding: 15px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .article-content {
                padding: 25px;
            }
        }
        @media print {
            .site-header,
            .sidebar,
            .site-footer,
            .comment-form,
            .search-form,
            .rating-form {
                display: none;
            }
            .main-content {
                grid-template-columns: 1fr;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }