* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #10b981;
            --dark: #1f2937;
            --light: #f9fafb;
            --gray: #6b7280;
            --gray-light: #e5e7eb;
            --accent: #f59e0b;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --container-max: 1200px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 1.5rem;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .btn {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
            color: white;
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #0da271;
        }
        .section {
            padding: 4rem 0;
        }
        .text-center {
            text-align: center;
        }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mb-5 { margin-bottom: 3rem; }
        header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo i {
            color: var(--secondary);
        }
        .my-logo:hover {
            color: var(--primary-dark);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            font-weight: 600;
            color: var(--dark);
            position: relative;
            padding: 0.5rem 0;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s ease;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark);
            cursor: pointer;
        }
        .breadcrumb {
            background: var(--gray-light);
            padding: 1rem 1.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--gray);
        }
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
            color: white;
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="white" opacity="0.05"/></svg>');
            background-size: cover;
        }
        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            margin: 0 auto;
        }
        .hero h1 {
            font-size: 3rem;
            line-height: 1.2;
            margin-bottom: 1.5rem;
        }
        .hero p {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 2rem;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 3rem 0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: var(--border-radius);
            padding: 3rem;
            box-shadow: var(--shadow);
        }
        .article-content h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .article-content h2 {
            font-size: 2rem;
            color: var(--dark);
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--gray-light);
        }
        .article-content h3 {
            font-size: 1.5rem;
            color: var(--primary-dark);
            margin: 2.5rem 0 1rem;
        }
        .article-content h4 {
            font-size: 1.2rem;
            color: var(--secondary);
            margin: 2rem 0 1rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content p.lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary-dark);
        }
        .highlight {
            background: linear-gradient(120deg, rgba(99, 102, 241, 0.1) 0%, rgba(99, 102, 241, 0) 100%);
            border-left: 4px solid var(--primary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            padding: 0.5rem;
            color: var(--gray);
            font-size: 0.9rem;
        }
        .quote {
            background: var(--gray-light);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            position: relative;
        }
        .quote::before {
            content: '"';
            font-size: 4rem;
            color: var(--primary);
            opacity: 0.2;
            position: absolute;
            top: -1rem;
            left: 1rem;
            font-family: Georgia, serif;
        }
        .quote p {
            font-size: 1.2rem;
            font-style: italic;
            color: var(--dark);
            position: relative;
            z-index: 1;
        }
        .quote-author {
            text-align: right;
            font-weight: 600;
            color: var(--primary);
            margin-top: 1rem;
        }
        .info-box {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            border: 1px solid #bae6fd;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .info-box h4 {
            color: #0369a1;
            margin-top: 0;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.2rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--gray-light);
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.75rem;
            border: 1px solid var(--gray-light);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            padding: 0 1.5rem;
            cursor: pointer;
        }
        .search-form button:hover {
            background: var(--primary-dark);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.25rem;
            margin-bottom: 1rem;
        }
        .star {
            font-size: 1.5rem;
            color: var(--gray-light);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--accent);
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid var(--gray-light);
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            margin-bottom: 1rem;
            resize: vertical;
            min-height: 120px;
        }
        .related-links {
            list-style: none;
            padding-left: 0;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid var(--gray-light);
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--dark);
        }
        .related-links a:hover {
            color: var(--primary);
        }
        .related-links i {
            color: var(--secondary);
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 4rem 0 2rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 3rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 768px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        .footer-column h4 {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: white;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #d1d5db;
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-bottom: 1.5rem;
        }
        friend-link a {
            color: var(--secondary);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #9ca3af;
            font-size: 0.9rem;
        }
        .update-time {
            background: var(--gray-light);
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            font-size: 0.9rem;
            display: inline-block;
            margin-bottom: 2rem;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .article-content {
                padding: 2rem;
            }
            .article-content h1 {
                font-size: 2rem;
            }
            .article-content h2 {
                font-size: 1.7rem;
            }
            .nav-links {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 2rem;
                box-shadow: var(--shadow);
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                z-index: 999;
            }
            .nav-links.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .hamburger {
                display: block;
            }
        }
        @media print {
            .sidebar, nav, footer, .search-form, .comment-form, .rating-widget {
                display: none;
            }
            main {
                grid-template-columns: 1fr;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }