:root {
            --primary-dark: #1a237e;
            --primary-main: #283593;
            --primary-light: #5c6bc0;
            --accent-color: #ff9800;
            --text-primary: #212121;
            --text-secondary: #757575;
            --bg-light: #f5f5f5;
            --bg-white: #ffffff;
            --border-color: #e0e0e0;
            --shadow-light: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-medium: 0 4px 12px rgba(0,0,0,0.08);
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Georgia', 'Times New Roman', serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            color: var(--text-primary);
            background-color: var(--bg-white);
            line-height: 1.8;
            font-size: 1.1rem;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            color: var(--primary-main);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background-color: var(--bg-white);
            box-shadow: var(--shadow-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--primary-dark);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            font-weight: 600;
            color: var(--text-primary);
            padding: 8px 5px;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent-color);
            text-decoration: none;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            bottom: 0;
            left: 0;
            background-color: var(--accent-color);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--primary-dark);
            cursor: pointer;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--bg-light);
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary-main);
        }
        .search-section {
            background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
            padding: 40px 0;
            text-align: center;
            color: white;
            margin: 20px 0 30px;
            border-radius: 10px;
        }
        .search-section h2 {
            margin-bottom: 20px;
            font-size: 2rem;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            box-shadow: var(--shadow-medium);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-input {
            flex-grow: 1;
            padding: 18px 25px;
            border: none;
            font-size: 1.1rem;
            font-family: var(--font-heading);
        }
        .search-button {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        .search-button:hover {
            background-color: #e68900;
        }
        .article-header {
            text-align: center;
            padding: 40px 0 30px;
            border-bottom: 2px solid var(--border-color);
            margin-bottom: 40px;
        }
        .article-header h1 {
            font-family: var(--font-heading);
            font-size: 3.2rem;
            color: var(--primary-dark);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 30px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-top: 20px;
        }
        .article-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 50px;
            padding: 20px 0 50px;
        }
        @media (max-width: 992px) {
            .article-content {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            font-size: 1.15rem;
        }
        .article-body p {
            margin-bottom: 1.8rem;
            text-align: justify;
        }
        .article-body h2 {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            color: var(--primary-dark);
            margin: 3rem 0 1.5rem;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent-color);
        }
        .article-body h3 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            color: var(--primary-main);
            margin: 2.5rem 0 1.2rem;
        }
        .article-body h4 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            color: var(--text-primary);
            margin: 2rem 0 1rem;
        }
        .key-point {
            background-color: #e3f2fd;
            border-left: 5px solid var(--primary-light);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 8px 8px 0;
        }
        .key-point p {
            margin-bottom: 0;
        }
        .featured-image {
            margin: 40px 0;
            text-align: center;
        }
        .featured-image img {
            border-radius: 10px;
            box-shadow: var(--shadow-medium);
            width: 100%;
            max-height: 500px;
            object-fit: cover;
        }
        .image-caption {
            font-style: italic;
            color: var(--text-secondary);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .internal-links-box {
            background-color: var(--bg-light);
            padding: 25px;
            border-radius: 10px;
            margin: 40px 0;
        }
        .internal-links-box h3 {
            margin-top: 0;
        }
        .internal-links-box ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin-top: 15px;
        }
        .internal-links-box li {
            padding: 5px 0;
        }
        .internal-links-box li::before {
            content: "♞";
            margin-right: 10px;
            color: var(--accent-color);
        }
        .article-sidebar {
            background-color: var(--bg-light);
            padding: 25px;
            border-radius: 10px;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 35px;
        }
        .sidebar-widget h3 {
            font-family: var(--font-heading);
            color: var(--primary-dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        .rating-form, .comment-form {
            background-color: var(--bg-white);
            padding: 25px;
            border-radius: 10px;
            box-shadow: var(--shadow-light);
            margin-bottom: 30px;
        }
        .rating-form h3, .comment-form h3 {
            margin-top: 0;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            margin: 15px 0 25px;
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating i {
            transition: color 0.2s;
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #ffc107;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-family: var(--font-body);
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(40, 53, 147, 0.1);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--primary-main);
            color: white;
            border: none;
            padding: 14px 30px;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .submit-button:hover {
            background-color: var(--primary-dark);
        }
        .site-footer {
            background-color: var(--primary-dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-widget h3 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            margin-bottom: 25px;
            color: #fff;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #bbbbbb;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
            transition: all 0.3s;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 15px;
            margin: 10px 0;
            border-radius: 6px;
            border-left: 4px solid var(--accent-color);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #bbbbbb;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background-color: var(--bg-white);
                box-shadow: var(--shadow-medium);
                transition: left 0.4s ease;
                z-index: 999;
                padding: 20px;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid var(--border-color);
            }
            .main-nav a {
                display: block;
                padding: 15px 0;
            }
            .article-header h1 {
                font-size: 2.5rem;
            }
            .article-body h2 {
                font-size: 1.9rem;
            }
            .article-body h3 {
                font-size: 1.6rem;
            }
            .search-form {
                flex-direction: column;
                border-radius: 10px;
            }
            .search-input, .search-button {
                border-radius: 0;
                padding: 15px;
            }
            .article-meta {
                flex-direction: column;
                gap: 10px;
                align-items: center;
            }
        }