:root {
            --primary-color: #1a6dcc;
            --primary-dark: #0d4d9c;
            --secondary-color: #ff9900;
            --secondary-dark: #cc7a00;
            --dark-bg: #0f172a;
            --light-bg: #f8fafc;
            --text-dark: #1e293b;
            --text-light: #64748b;
            --border-color: #cbd5e1;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1e3a8a 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #4facfe 0%, #00f2fe 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #00f2fe;
            font-size: 2.5rem;
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .search-form {
            flex-grow: 1;
            max-width: 400px;
            margin: 0 30px;
            position: relative;
        }
        .search-form input {
            width: 100%;
            padding: 12px 20px 12px 45px;
            border: none;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            color: white;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input::placeholder {
            color: rgba(255, 255, 255, 0.7);
        }
        .search-form input:focus {
            outline: none;
            background: rgba(255, 255, 255, 0.2);
            box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.3);
        }
        .search-form button {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.2rem;
            cursor: pointer;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .nav-main {
            background-color: rgba(15, 23, 42, 0.95);
            margin-top: 1rem;
            border-radius: var(--radius);
            padding: 0 1.5rem;
        }
        .nav-list {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 2px;
        }
        .nav-item {
            flex: 1;
            text-align: center;
            min-width: 120px;
        }
        .nav-link {
            display: block;
            padding: 18px 20px;
            font-weight: 600;
            color: #cbd5e1;
            position: relative;
            overflow: hidden;
        }
        .nav-link:hover,
        .nav-link.active {
            color: white;
            background: linear-gradient(90deg, transparent, rgba(79, 172, 254, 0.15), transparent);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, #4facfe, #00f2fe);
            transition: var(--transition);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 80%;
        }
        .breadcrumb {
            padding: 1.2rem 0;
            background-color: #e2e8f0;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: '/';
            margin-left: 8px;
            color: #94a3b8;
        }
        .breadcrumb-item a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        .article-content {
            background: white;
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: white;
            border-radius: var(--radius);
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            color: var(--dark-bg);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--secondary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .widget-title i {
            color: var(--primary-color);
        }
        h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--dark-bg);
            margin-bottom: 1.5rem;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-align: center;
        }
        h2 {
            font-size: 2rem;
            color: var(--dark-bg);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary-dark);
            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;
            color: var(--primary-dark);
            font-weight: 500;
            padding: 20px;
            background: linear-gradient(90deg, rgba(26, 109, 204, 0.05), rgba(255, 153, 0, 0.05));
            border-left: 4px solid var(--primary-color);
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 2rem 0;
        }
        strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(255, 153, 0, 0.15) 0%, rgba(255, 153, 0, 0) 80%);
            padding: 3px 6px;
            border-radius: 3px;
        }
        .info-box {
            padding: 25px;
            background: linear-gradient(135deg, #f0f9ff 0%, #e6f7ff 100%);
            border-radius: var(--radius);
            border-left: 5px solid var(--primary-color);
            margin: 2rem 0;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        }
        .info-box.warning {
            background: linear-gradient(135deg, #fff7ed 0%, #fffbeb 100%);
            border-left-color: var(--secondary-color);
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
            position: relative;
        }
        .image-container img {
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
        }
        .image-container img:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
        }
        .image-caption {
            margin-top: 12px;
            font-style: italic;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .btn {
            display: inline-block;
            padding: 14px 28px;
            background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(26, 109, 204, 0.3);
            background: linear-gradient(90deg, var(--primary-dark), var(--primary-color));
        }
        .btn-secondary {
            background: linear-gradient(90deg, var(--secondary-color), var(--secondary-dark));
        }
        .btn-secondary:hover {
            box-shadow: 0 7px 15px rgba(255, 153, 0, 0.3);
            background: linear-gradient(90deg, var(--secondary-dark), var(--secondary-color));
        }
        .interactive-section {
            padding: 30px;
            background: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 3rem 0;
        }
        .interactive-title {
            font-size: 1.8rem;
            color: var(--dark-bg);
            margin-bottom: 25px;
            text-align: center;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--text-dark);
        }
        .form-control {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid var(--border-color);
            border-radius: var(--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, 109, 204, 0.1);
        }
        .rating {
            display: flex;
            gap: 10px;
            margin: 15px 0;
            flex-wrap: wrap;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffc107;
        }
        .rating input:checked ~ label {
            color: #ffc107;
        }
        .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 2rem 0;
        }
        .tag {
            padding: 8px 16px;
            background: #e2e8f0;
            border-radius: 50px;
            font-size: 0.9rem;
            color: var(--text-dark);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }
        .related-links {
            background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
            padding: 25px;
            border-radius: var(--radius);
            margin: 3rem 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .related-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 12px;
        }
        .related-links li a {
            display: flex;
            align-items: center;
            padding: 12px 15px;
            background: white;
            border-radius: var(--radius);
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .related-links li a:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            background: linear-gradient(90deg, white, #f0f9ff);
        }
        .related-links li a i {
            margin-right: 10px;
            color: var(--primary-color);
        }
        .footer {
            background: var(--dark-bg);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 20px;
            background: linear-gradient(90deg, #4facfe 0%, #00f2fe 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .footer-title {
            font-size: 1.3rem;
            margin-bottom: 25px;
            color: #cbd5e1;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--secondary-color);
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: white;
            transform: translateX(5px);
        }
        .footer-links a i {
            width: 20px;
        }
        friend-link {
            display: block;
            padding: 15px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            margin-bottom: 10px;
            text-align: center;
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #94a3b8;
            font-size: 0.9rem;
        }
        .update-time {
            background: linear-gradient(90deg, rgba(255, 153, 0, 0.1), rgba(26, 109, 204, 0.1));
            padding: 15px;
            border-radius: var(--radius);
            text-align: center;
            margin: 2rem 0;
            font-weight: 600;
            color: var(--primary-dark);
        }
        @media (max-width: 1024px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .header-top {
                flex-direction: column;
                gap: 20px;
            }
            .search-form {
                order: 3;
                max-width: 100%;
                margin: 15px 0 0;
            }
            .mobile-toggle {
                display: block;
                position: absolute;
                top: 25px;
                right: 20px;
            }
            .nav-main {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--dark-bg);
                border-radius: 0;
                padding: 0;
                margin-top: 0;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
                z-index: 1001;
            }
            .nav-main.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
            }
            .nav-item {
                min-width: 100%;
            }
            .nav-link {
                padding: 18px 25px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .article-content {
                padding: 25px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .interactive-section {
                padding: 20px;
            }
            .related-links ul {
                grid-template-columns: 1fr;
            }
        }