:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #dc2626;
            --accent: #f59e0b;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f9fafb;
            --bg-white: #ffffff;
            --border: #e5e7eb;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--bg-white);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary);
        }
        .my-logo:hover {
            color: var(--primary-dark);
        }
        .search-form {
            display: flex;
            flex: 0 1 400px;
            max-width: 400px;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.75rem 1rem;
            border: 2px solid var(--border);
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--primary-dark);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--text-dark);
        }
        nav ul {
            display: flex;
            list-style: none;
            background: linear-gradient(to right, var(--primary), var(--primary-dark));
            border-radius: var(--radius);
            overflow: hidden;
        }
        nav li {
            flex: 1;
        }
        nav a {
            display: block;
            padding: 1rem 1.5rem;
            color: white;
            text-align: center;
            font-weight: 600;
            border-right: 1px solid rgba(255,255,255,0.1);
        }
        nav li:last-child a {
            border-right: none;
        }
        nav a:hover, nav a.active {
            background-color: rgba(255,255,255,0.15);
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            margin: 0 8px;
        }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        .article-content {
            background-color: var(--bg-white);
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 2px solid var(--border);
            padding-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--text-dark);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #fef3c7;
            color: #92400e;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 600;
        }
        .featured-image {
            margin: 2.5rem 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .featured-image figcaption {
            padding: 1rem;
            background-color: var(--bg-light);
            font-style: italic;
            color: var(--text-light);
            text-align: center;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-dark);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed var(--border);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--text-dark);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.25rem;
            color: var(--secondary);
            margin: 1.5rem 0 0.75rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.25rem;
            color: var(--primary-dark);
            font-weight: 600;
            padding: 1.5rem;
            background-color: #eff6ff;
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 2rem 0;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .strategy-box {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            border: 1px solid #bae6fd;
            padding: 1.5rem;
            border-radius: var(--radius);
            margin: 2rem 0;
        }
        .strategy-box h4 {
            color: #0369a1;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .quote {
            font-style: italic;
            padding: 2rem;
            background-color: #f8fafc;
            border-left: 4px solid var(--accent);
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .quote-author {
            text-align: right;
            font-weight: 600;
            color: var(--text-light);
            margin-top: 1rem;
        }
        .link-box {
            display: inline-block;
            background-color: var(--primary);
            color: white;
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-weight: 600;
            margin: 0.5rem 0;
            box-shadow: 0 4px 6px rgba(37, 99, 235, 0.2);
        }
        .link-box:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(37, 99, 235, 0.3);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: white;
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            text-align: center;
            border-top: 4px solid var(--primary);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }
        .stat-label {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-top: 0.5rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: var(--bg-white);
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.25rem;
            color: var(--primary-dark);
            margin-bottom: 1rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--border);
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px dotted var(--border);
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-dark);
        }
        .related-links a:hover {
            color: var(--primary);
        }
        .related-links i {
            color: var(--accent);
        }
        .user-interaction {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid var(--border);
        }
        .interaction-title {
            text-align: center;
            margin-bottom: 2rem;
            color: var(--text-dark);
        }
        .rating-section, .comment-section {
            background-color: #f8fafc;
            padding: 1.5rem;
            border-radius: var(--radius);
            margin-bottom: 2rem;
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1rem 0;
            font-size: 2rem;
            color: #e5e7eb;
        }
        .star-rating .fas {
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating .fas.active {
            color: #f59e0b;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .rating-form input, .comment-form input,
        .comment-form textarea {
            padding: 0.75rem 1rem;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
        }
        .comment-form textarea {
            min-height: 150px;
            resize: vertical;
        }
        .form-submit {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            align-self: flex-start;
            transition: var(--transition);
        }
        .form-submit:hover {
            background-color: var(--primary-dark);
        }
        .site-footer {
            background-color: var(--text-dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1rem;
            font-size: 1.25rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: #d1d5db;
        }
        .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: var(--radius);
            margin: 1.5rem 0;
        }
        friend-link a {
            color: var(--accent);
            font-weight: 600;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #374151;
            color: #9ca3af;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex: 0 1 300px;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                box-shadow: var(--shadow);
                border-radius: 0 0 var(--radius) var(--radius);
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                background: none;
                border-radius: 0;
            }
            nav a {
                color: var(--text-dark);
                border-right: none;
                border-bottom: 1px solid var(--border);
                text-align: left;
                padding: 1rem 1.5rem;
            }
            nav a:hover {
                background-color: var(--bg-light);
            }
            .header-top {
                flex-wrap: wrap;
                gap: 1rem;
            }
            .search-form {
                order: 3;
                flex: 1 0 100%;
                max-width: 100%;
            }
            .article-content {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.75rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }