:root {
            --primary-blue: #2a5c8a;
            --secondary-teal: #4a9b9b;
            --accent-yellow: #f2c94c;
            --dark-navy: #1c3a5f;
            --light-beige: #f8f4e9;
            --text-dark: #333333;
            --text-light: #666666;
            --border-color: #e0dac7;
            --shadow: 0 4px 12px rgba(26, 58, 95, 0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            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-dark);
            background-color: #ffffff;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-navy) 0%, var(--primary-blue) 100%);
            color: white;
            padding: 1.5rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: Georgia, 'Times New Roman', Times, serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--accent-yellow);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            transform: scale(1.05);
            color: white;
        }
        .my-logo i {
            font-size: 2rem;
        }
        .breadcrumb {
            background-color: var(--light-beige);
            padding: 0.8rem 1rem;
            border-radius: var(--radius);
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-blue);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--accent-yellow);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent-yellow);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .search-container {
            margin: 2rem auto;
            max-width: 700px;
            padding: 0 1rem;
        }
        .search-form {
            display: flex;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-form input {
            flex-grow: 1;
            padding: 1.2rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            background-color: var(--light-beige);
        }
        .search-form button {
            background-color: var(--secondary-teal);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--primary-blue);
        }
        .article-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2.5rem 0;
        }
        @media (max-width: 1024px) {
            .article-container {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        article h1 {
            color: var(--dark-navy);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent-yellow);
            padding-bottom: 0.5rem;
        }
        article h2 {
            color: var(--primary-blue);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
        }
        article h3 {
            color: var(--secondary-teal);
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        article h4 {
            color: var(--text-light);
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
        }
        article p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .intro {
            font-size: 1.3rem;
            color: var(--text-light);
            background: linear-gradient(to right, var(--light-beige), transparent);
            padding: 1.5rem;
            border-left: 5px solid var(--accent-yellow);
            border-radius: var(--radius);
            margin-bottom: 2.5rem;
        }
        .highlight-box {
            background-color: var(--light-beige);
            border-left: 4px solid var(--secondary-teal);
            padding: 1.8rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .internal-link {
            color: var(--primary-blue);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--secondary-teal);
            transition: var(--transition);
        }
        .internal-link:hover {
            color: var(--secondary-teal);
            background-color: #f0f8ff;
            padding: 2px 4px;
            border-radius: 3px;
        }
        .content-img {
            float: right;
            max-width: 45%;
            margin: 0 0 1.5rem 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        @media (max-width: 768px) {
            .content-img {
                float: none;
                max-width: 100%;
                margin: 1rem 0;
            }
        }
        .key-point {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            padding: 1.5rem;
            border-radius: var(--radius);
            margin: 2rem 0;
            border: 1px solid var(--border-color);
        }
        .key-point h4 {
            color: var(--dark-navy);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .key-point h4 i {
            color: var(--accent-yellow);
        }
        .sidebar {
            background-color: var(--light-beige);
            padding: 2rem;
            border-radius: var(--radius);
            align-self: start;
            position: sticky;
            top: 120px;
            box-shadow: var(--shadow);
        }
        .sidebar h3 {
            color: var(--dark-navy);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-yellow);
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 1rem;
        }
        .sidebar a {
            color: var(--text-dark);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0.8rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .sidebar a:hover {
            background-color: white;
            color: var(--primary-blue);
            transform: translateX(5px);
        }
        .user-interaction {
            margin: 4rem 0;
            padding: 2.5rem;
            background-color: #f9f9f9;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        .form-container {
            background-color: white;
            padding: 2rem;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
        }
        .form-container h3 {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text-light);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--secondary-teal);
            box-shadow: 0 0 0 3px rgba(74, 155, 155, 0.2);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            direction: rtl;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: var(--accent-yellow);
        }
        .btn-submit {
            background: linear-gradient(to right, var(--secondary-teal), var(--primary-blue));
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }
        .btn-submit:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(42, 92, 138, 0.2);
        }
        .site-footer {
            background-color: var(--dark-navy);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h4 {
            color: var(--accent-yellow);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-section ul {
            list-style: none;
        }
        .footer-section li {
            margin-bottom: 0.8rem;
        }
        .footer-section a {
            color: #cccccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-section a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 1rem;
            border-radius: var(--radius);
            margin: 1rem 0;
            border-left: 4px solid var(--accent-yellow);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaaaaa;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #fff3cd;
            color: #856404;
            padding: 0.8rem 1.5rem;
            border-radius: var(--radius);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin: 1.5rem 0;
            font-weight: 600;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 15px;
            }
            .menu-toggle {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 500px;
                margin-top: 1.5rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            article h1 {
                font-size: 2.2rem;
            }
            .main-content {
                padding: 1.8rem;
            }
            .user-interaction {
                padding: 1.8rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            .site-header,
            .search-container,
            .sidebar,
            .user-interaction,
            .site-footer {
                display: none;
            }
            body {
                max-width: 100%;
                padding: 0;
            }
            .main-content {
                box-shadow: none;
                padding: 0;
            }
            article h1 {
                color: black;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }