:root {
            --primary: #1a365d;
            --secondary: #c53030;
            --accent: #ecc94b;
            --light: #f7fafc;
            --dark: #2d3748;
            --gray: #a0aec0;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.8;
            color: var(--dark);
            background-color: var(--light);
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary), #2a4365);
            color: white;
            padding: 1.2rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 var(--radius) var(--radius);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-decoration: none;
            color: var(--accent);
            letter-spacing: -1px;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: white;
            transform: scale(1.02);
        }
        .my-logo i {
            color: var(--secondary);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .search-form {
            display: flex;
            background: white;
            border-radius: 50px;
            overflow: hidden;
            width: 300px;
            box-shadow: var(--shadow);
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 0.8rem 1.2rem;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: #9b2c2c;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: var(--gray);
            margin-bottom: 2rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid var(--secondary);
            padding-left: 1rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed var(--accent);
        }
        h3 {
            color: var(--secondary);
            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;
            text-align: justify;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 500;
            color: var(--primary);
            background: #f0f9ff;
            padding: 1.5rem;
            border-radius: var(--radius);
            border-left: 4px solid var(--accent);
            margin-bottom: 2rem;
        }
        strong {
            color: var(--secondary);
            font-weight: 700;
        }
        em {
            color: #2d3748;
            font-style: italic;
        }
        .highlight {
            background: linear-gradient(120deg, #fef3c7 0%, #fef3c7 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        a.content-link {
            color: var(--primary);
            text-decoration: underline;
            font-weight: 600;
            transition: var(--transition);
        }
        a.content-link:hover {
            color: var(--secondary);
        }
        .article-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        aside {
            background: white;
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2.5rem;
        }
        .sidebar-section h3 {
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .quick-links ul {
            list-style: none;
        }
        .quick-links li {
            margin-bottom: 0.8rem;
        }
        .quick-links a {
            color: var(--dark);
            text-decoration: none;
            display: block;
            padding: 0.7rem 1rem;
            background: #f8f9fa;
            border-radius: 6px;
            transition: var(--transition);
        }
        .quick-links a:hover {
            background: var(--primary);
            color: white;
            padding-left: 1.5rem;
        }
        .user-interaction {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: var(--radius);
            margin-top: 3rem;
            border: 1px solid #e2e8f0;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #cbd5e0;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            margin-top: 0.5rem;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: var(--accent);
        }
        .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.7rem;
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #9b2c2c;
        }
        footer {
            background: var(--primary);
            color: white;
            padding: 3rem 2rem;
            border-radius: var(--radius) var(--radius) 0 0;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        friend-link {
            display: block;
            margin: 1.5rem 0;
            padding: 1rem;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            transition: var(--transition);
        }
        friend-link a {
            color: #cbd5e0;
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #cbd5e0;
        }
        .update-time {
            background: var(--accent);
            color: var(--primary);
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-weight: 700;
            display: inline-block;
            margin: 1rem 0;
        }
        @media (max-width: 1024px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            body {
                padding: 0 15px;
            }
            .header-container {
                flex-direction: column;
                align-items: stretch;
                gap: 1.5rem;
            }
            .main-nav {
                order: 3;
                width: 100%;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.5rem;
                display: none;
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.2rem;
                right: 20px;
            }
            .search-form {
                width: 100%;
                order: 2;
            }
            h1 {
                font-size: 2.2rem;
            }
            article {
                padding: 1.5rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }
        @media print {
            .site-header, aside, .user-interaction, footer, .hamburger, .search-form {
                display: none;
            }
            body {
                max-width: 100%;
                padding: 0;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
        }