* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f9fafb;
            --bg-dark: #111827;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid #e5e7eb;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span {
            color: var(--secondary-color);
            font-style: italic;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .search-box {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-box input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #d1d5db;
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-box input:focus {
            border-color: var(--primary-color);
        }
        .search-box button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 30px 30px 0;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .search-box button:hover {
            background-color: #1e40af;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary-color);
            cursor: pointer;
        }
        nav {
            padding: 15px 0;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
            justify-content: center;
        }
        .nav-menu a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 5px;
            position: relative;
            transition: var(--transition);
        }
        .nav-menu a:hover {
            color: var(--secondary-color);
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .nav-menu a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 40px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-content {
            background-color: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 20px;
            margin-bottom: 30px;
            border-bottom: 2px solid #e5e7eb;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .update-time {
            color: var(--secondary-color);
            font-weight: 600;
        }
        h2 {
            font-size: 2rem;
            color: var(--text-dark);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent-color);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--primary-color);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--secondary-color);
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--text-dark);
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 30px;
            padding-left: 20px;
            border-left: 5px solid var(--accent-color);
        }
        .highlight {
            background-color: #fef3c7;
            padding: 20px;
            border-radius: 8px;
            margin: 25px 0;
            border-left: 5px solid var(--accent-color);
        }
        .highlight strong {
            color: var(--primary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 30px auto;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: -20px;
            margin-bottom: 30px;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 10px;
        }
        a.article-link {
            color: var(--primary-color);
            text-decoration: underline;
            font-weight: 600;
            transition: var(--transition);
        }
        a.article-link:hover {
            color: var(--secondary-color);
            text-decoration: none;
        }
        blockquote {
            border-left: 5px solid var(--secondary-color);
            padding: 20px 30px;
            margin: 30px 0;
            background-color: #f8fafc;
            font-style: italic;
            font-size: 1.2rem;
            color: var(--text-dark);
        }
        aside {
            background-color: white;
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--primary-color);
            padding-bottom: 10px;
            border-bottom: 2px solid #e5e7eb;
        }
        .widget-links {
            list-style: none;
        }
        .widget-links li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed #e5e7eb;
        }
        .widget-links a {
            text-decoration: none;
            color: var(--text-dark);
            transition: var(--transition);
            display: block;
        }
        .widget-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .user-interaction {
            background-color: white;
            border-radius: 12px;
            padding: 40px;
            margin-top: 40px;
            box-shadow: var(--shadow);
            grid-column: 1 / -1;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .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: 12px 15px;
            border: 2px solid #d1d5db;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 15px 0;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: var(--accent-color);
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 14px 30px;
            border-radius: 8px;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
            text-align: center;
        }
        .btn:hover {
            background-color: #1e40af;
            transform: translateY(-3px);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
        }
        .btn-secondary:hover {
            background-color: #b91c1c;
        }
        footer {
            background-color: var(--bg-dark);
            color: #f9fafb;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            margin-bottom: 20px;
            display: block;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #d1d5db;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 15px;
        }
        friend-link a {
            color: var(--accent-color);
            font-weight: 600;
            text-decoration: none;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #374151;
            color: #9ca3af;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            main {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            aside {
                position: static;
            }
            h1 {
                font-size: 2.4rem;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
                gap: 15px;
            }
            .search-box {
                order: 3;
                max-width: 100%;
            }
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                padding: 0;
            }
            .nav-menu {
                flex-direction: column;
                gap: 0;
            }
            .nav-menu li {
                border-bottom: 1px solid #e5e7eb;
            }
            .nav-menu a {
                display: block;
                padding: 15px 0;
            }
            .nav-active {
                display: block;
            }
            .article-content {
                padding: 25px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .lead {
                font-size: 1.1rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            header, aside, .user-interaction, footer {
                display: none;
            }
            main {
                display: block;
                padding: 0;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }