:root {
            --primary-color: #3a6ea5;
            --secondary-color: #c0a050;
            --dark-bg: #1a1a2e;
            --content-bg: #f8f9fa;
            --text-color: #333;
            --light-text: #666;
            --border-color: #ddd;
            --accent-color: #e63946;
            --success-color: #2a9d8f;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--content-bg);
            color: var(--text-color);
            line-height: 1.7;
            max-width: 100%;
            overflow-x: hidden;
        }
        header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #16213e 100%);
            color: white;
            padding: 1rem 2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary-color);
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: white;
            transform: scale(1.03);
            transition: transform 0.3s ease;
        }
        .my-logo i {
            font-size: 2.5rem;
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .desktop-nav {
                display: none;
            }
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .desktop-nav a:hover, .desktop-nav a.active {
            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;
        }
        @media (max-width: 992px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--dark-bg);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .mobile-nav a:hover {
            background-color: rgba(255,255,255,0.1);
            color: var(--secondary-color);
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--light-text);
        }
        .search-container {
            max-width: 800px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        .search-box {
            display: flex;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-box input {
            flex: 1;
            padding: 1.2rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-box button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background-color 0.3s;
        }
        .search-box button:hover {
            background-color: #2d5684;
        }
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 1200px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
        }
        h1 {
            color: var(--dark-bg);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 5px solid var(--secondary-color);
            padding-left: 1rem;
        }
        h2 {
            color: var(--primary-color);
            font-size: 2.2rem;
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            color: #2d5684;
            font-size: 1.7rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--light-text);
            font-size: 1.4rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--dark-bg);
            background-color: #f1f8ff;
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 2.5rem;
            border-left: 4px solid var(--primary-color);
        }
        .highlight {
            background-color: #fff9e6;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--secondary-color);
            margin: 2rem 0;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        .data-table th {
            background-color: var(--primary-color);
            color: white;
            text-align: left;
            padding: 1rem;
        }
        .data-table td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        .data-table tr:hover {
            background-color: #f5f9ff;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            display: block;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--light-text);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
        }
        sidebar {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .toc {
            margin-bottom: 2rem;
        }
        .toc h3 {
            color: var(--dark-bg);
            margin-top: 0;
        }
        .toc ul {
            list-style: none;
        }
        .toc li {
            margin-bottom: 0.8rem;
        }
        .toc a {
            color: var(--text-color);
            text-decoration: none;
            display: block;
            padding: 0.5rem;
            border-radius: 4px;
        }
        .toc a:hover {
            background-color: #f0f7ff;
            color: var(--primary-color);
        }
        .update-time {
            background-color: #e7f7ef;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
            margin-top: 2rem;
            color: var(--success-color);
            font-weight: 600;
        }
        .user-interaction {
            background-color: #f8f9fa;
            padding: 2.5rem;
            border-radius: 12px;
            margin: 3rem 0;
            border: 1px solid var(--border-color);
        }
        .interaction-title {
            color: var(--dark-bg);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .star-rating {
            display: flex;
            gap: 5px;
        }
        .star-rating i {
            color: #ddd;
            cursor: pointer;
            font-size: 1.8rem;
            transition: color 0.2s;
        }
        .star-rating i:hover, .star-rating i.active {
            color: #ffc107;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        input, textarea, select {
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            width: 100%;
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        button[type="submit"] {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 1.2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        button[type="submit"]:hover {
            background-color: #2d5684;
        }
        footer {
            background-color: var(--dark-bg);
            color: white;
            padding: 3rem 2rem 2rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        friend-link a {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 1rem;
            }
            article {
                padding: 2rem 1.5rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .header-container {
                padding: 0 1rem;
            }
            .search-container {
                padding: 0 1rem;
            }
        }
        .interactive-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted transparent;
            transition: all 0.3s ease;
        }
        .interactive-link:hover {
            border-bottom-color: var(--primary-color);
            color: #2d5684;
        }
        .tooltip {
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted var(--light-text);
            cursor: help;
        }
        .tooltip .tooltiptext {
            visibility: hidden;
            width: 200px;
            background-color: var(--dark-bg);
            color: white;
            text-align: center;
            padding: 0.5rem;
            border-radius: 4px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.9rem;
        }
        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }