* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a237e;
            --secondary-color: #ff5722;
            --accent-color: #4caf50;
            --text-dark: #212121;
            --text-light: #757575;
            --bg-light: #f5f5f5;
            --bg-white: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --border-radius: 8px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-color), #283593);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 1px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .my-logo i {
            color: var(--secondary-color);
            font-size: 2.5rem;
        }
        .breadcrumb {
            background-color: #e8eaf6;
            padding: 12px 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li {
            margin-right: 8px;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 8px;
            color: var(--text-light);
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .search-container {
            background-color: var(--bg-white);
            padding: 30px 0;
            margin: 20px 0;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            text-align: center;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
        }
        .search-input {
            flex-grow: 1;
            padding: 15px 20px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-button:hover {
            background-color: var(--secondary-color);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 40px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: var(--bg-white);
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: var(--bg-white);
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            color: var(--primary-color);
            padding-bottom: 10px;
            margin-bottom: 15px;
            border-bottom: 2px solid var(--secondary-color);
            font-size: 1.3rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--text-dark);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--text-light);
            background-color: #f0f7ff;
            padding: 20px;
            border-left: 4px solid var(--primary-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 25px;
            border-radius: var(--border-radius);
            border-left: 4px solid #ffb300;
            margin: 25px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        .emoji-divider {
            text-align: center;
            font-size: 2rem;
            margin: 30px 0;
            color: var(--primary-color);
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 30px 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: -20px;
            margin-bottom: 30px;
            font-size: 0.9rem;
        }
        .content-links {
            background-color: #f5f7ff;
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 30px 0;
        }
        .content-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 12px;
            list-style: none;
        }
        .content-links a {
            color: var(--primary-color);
            text-decoration: none;
            padding: 8px 12px;
            display: block;
            border-radius: 6px;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .content-links a:hover {
            background-color: white;
            border-color: var(--primary-color);
            padding-left: 20px;
        }
        .content-links i {
            margin-right: 8px;
            color: var(--secondary-color);
        }
        .user-interaction {
            background-color: var(--bg-white);
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 40px 0;
        }
        .interaction-tabs {
            display: flex;
            border-bottom: 2px solid #eee;
            margin-bottom: 30px;
        }
        .tab-button {
            padding: 15px 30px;
            background: none;
            border: none;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
            border-bottom: 3px solid transparent;
            margin-bottom: -2px;
        }
        .tab-button.active {
            color: var(--primary-color);
            border-bottom-color: var(--secondary-color);
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--text-dark);
        }
        .form-control {
            width: 100%;
            padding: 14px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 10px 0 20px;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .submit-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 15px 35px;
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .submit-button:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(255, 87, 34, 0.2);
        }
        .site-footer {
            background-color: #1a1a1a;
            color: #ccc;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 15px;
            display: inline-block;
            text-decoration: none;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #2a2a2a;
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 20px 0;
        }
        friend-link a {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 600;
            display: inline-block;
            margin-right: 20px;
            margin-bottom: 10px;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #333;
            color: #888;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #e8f5e9;
            padding: 15px;
            border-radius: var(--border-radius);
            margin: 20px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: #2e7d32;
            font-weight: 500;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 80px;
                left: 0;
                right: 0;
                background-color: var(--primary-color);
                flex-direction: column;
                padding: 20px;
                border-radius: 0 0 var(--border-radius) var(--border-radius);
                box-shadow: var(--shadow);
                display: none;
                z-index: 999;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links a {
                padding: 15px;
                justify-content: center;
            }
            .article-content {
                padding: 25px;
            }
            .sidebar {
                position: static;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: var(--border-radius);
                margin-bottom: 10px;
            }
            .search-button {
                border-radius: var(--border-radius);
                justify-content: center;
                padding: 15px;
            }
            .content-links ul {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .interaction-tabs {
                flex-direction: column;
            }
            .tab-button {
                width: 100%;
                text-align: left;
                border-bottom: 1px solid #eee;
            }
            .rating-stars {
                justify-content: center;
            }
            .form-control {
                padding: 12px;
            }
        }