:root {
            --primary: #1a365d;
            --secondary: #e53e3e;
            --accent: #ed8936;
            --light: #f7fafc;
            --dark: #2d3748;
            --gray: #a0aec0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary), #2d3748);
            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;
            letter-spacing: 2px;
            color: white;
            text-transform: uppercase;
            background: linear-gradient(to right, #ed8936, #e53e3e);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-links a {
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .nav-links a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .breadcrumb {
            background-color: #e2e8f0;
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .search-section {
            background: linear-gradient(to right, #4c51bf, #2b6cb0);
            padding: 2.5rem 0;
            text-align: center;
            color: white;
        }
        .search-box {
            max-width: 600px;
            margin: 0 auto;
        }
        .search-box h2 {
            margin-bottom: 1rem;
            font-size: 1.8rem;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-form input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 0 1.8rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #c05621;
        }
        main {
            padding: 3rem 0;
        }
        article {
            background-color: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 3rem;
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 0.8rem;
        }
        h2 {
            color: var(--secondary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #e2e8f0;
        }
        h3 {
            color: var(--primary);
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #4a5568;
            font-size: 1.3rem;
            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: 600;
            color: var(--primary);
            background-color: #f0f9ff;
            padding: 1.2rem;
            border-left: 5px solid var(--accent);
            border-radius: 0 8px 8px 0;
        }
        .highlight {
            background-color: #fffaf0;
            border-left: 4px solid #ed8936;
            padding: 1.5rem;
            margin: 1.8rem 0;
            border-radius: 0 8px 8px 0;
        }
        .related-links {
            background-color: #f7fafc;
            border: 1px solid #e2e8f0;
            padding: 1.8rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .related-links h4 {
            color: var(--secondary);
            margin-top: 0;
        }
        .related-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 0.8rem;
        }
        .related-links li a {
            display: block;
            padding: 0.7rem 1rem;
            background-color: white;
            border-radius: 4px;
            border-left: 4px solid var(--primary);
        }
        .related-links li a:hover {
            background-color: #edf2f7;
            transform: translateX(5px);
            border-left-color: var(--accent);
        }
        .feature-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1.8rem;
            border-radius: 10px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: transform 0.3s;
        }
        .stat:hover {
            transform: translateY(-5px);
        }
        .stat i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }
        .stat .number {
            font-size: 2.2rem;
            font-weight: 800;
            display: block;
        }
        .stat .label {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        .update-time {
            font-size: 0.95rem;
            color: var(--gray);
            text-align: right;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #e2e8f0;
        }
        .user-interaction {
            background-color: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: var(--shadow);
            margin-bottom: 3rem;
        }
        .interaction-tabs {
            display: flex;
            border-bottom: 2px solid #e2e8f0;
            margin-bottom: 2rem;
        }
        .tab-btn {
            padding: 1rem 2rem;
            background: none;
            border: none;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            position: relative;
        }
        .tab-btn.active {
            color: var(--secondary);
        }
        .tab-btn.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--secondary);
        }
        .tab-content {
            display: none;
            animation: fadeIn 0.5s;
        }
        .tab-content.active {
            display: block;
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0 1.5rem;
        }
        .rating-stars .star {
            color: #cbd5e0;
            font-size: 2rem;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars .star.selected,
        .rating-stars .star:hover {
            color: #f6ad55;
        }
        form {
            display: grid;
            gap: 1.2rem;
        }
        input, textarea, select {
            padding: 1rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(237, 137, 54, 0.2);
        }
        button[type="submit"] {
            background: linear-gradient(to right, var(--secondary), var(--accent));
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 6px;
            cursor: pointer;
            transition: var(--transition);
        }
        button[type="submit"]:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }
        .comments-list {
            margin-top: 2rem;
        }
        .comment {
            border-bottom: 1px solid #e2e8f0;
            padding: 1.5rem 0;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.8rem;
        }
        .comment-author {
            font-weight: 700;
            color: var(--primary);
        }
        .comment-date {
            color: var(--gray);
            font-size: 0.9rem;
        }
        footer {
            background-color: var(--primary);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.8rem;
            background-color: rgba(255,255,255,0.05);
            border-radius: 4px;
        }
        friend-link:hover {
            background-color: rgba(255,255,255,0.1);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .mobile-toggle {
                display: block;
            }
            nav {
                width: 100%;
                order: 3;
                margin-top: 1rem;
                display: none;
            }
            nav.active {
                display: block;
            }
            .nav-links {
                flex-direction: column;
                gap: 0.5rem;
            }
            .nav-links a {
                display: block;
                padding: 0.8rem;
                text-align: center;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .stats-box {
                grid-template-columns: 1fr;
            }
            .related-links ul {
                grid-template-columns: 1fr;
            }
            .interaction-tabs {
                flex-direction: column;
            }
            .tab-btn {
                text-align: left;
                border-bottom: 1px solid #e2e8f0;
            }
            .tab-btn.active::after {
                width: 5px;
                height: 100%;
                bottom: 0;
                left: 0;
            }
        }