:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f9fafb;
            --bg-white: #ffffff;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--text-dark);
            background-color: var(--bg-light);
            line-height: 1.7;
            font-size: 1.125rem;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        header {
            background-color: var(--bg-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 0;
        }
        .my-logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .breadcrumb {
            font-size: 0.9rem;
            color: var(--text-light);
            margin: 0.5rem 0 1.5rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 600;
            transition: var(--transition);
            padding: 0.5rem 0;
            position: relative;
        }
        nav a:hover {
            color: var(--secondary-color);
        }
        nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--secondary-color);
            left: 0;
            bottom: 0;
            transition: var(--transition);
        }
        nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
        }
        .search-box {
            max-width: 600px;
            margin: 2.5rem auto 3rem;
            background: var(--bg-white);
            padding: 0.5rem;
            border-radius: 50px;
            box-shadow: var(--shadow);
            display: flex;
        }
        .search-box input {
            flex: 1;
            border: none;
            outline: none;
            padding: 1rem 1.5rem;
            font-size: 1.1rem;
            border-radius: 50px 0 0 50px;
        }
        .search-box button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 0 2rem;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--secondary-color);
        }
        main {
            padding: 2rem 0 4rem;
        }
        article {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 3rem;
            box-shadow: var(--shadow);
            margin-bottom: 3rem;
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--accent-color);
            padding-bottom: 0.75rem;
        }
        h2 {
            color: var(--secondary-color);
            font-size: 2.2rem;
            margin: 3rem 0 1.5rem;
            padding-top: 1rem;
        }
        h3 {
            color: var(--primary-color);
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem;
        }
        h4 {
            color: var(--text-dark);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.8rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.4rem;
            font-weight: 500;
            color: var(--text-dark);
            background: linear-gradient(90deg, #e0f2fe, #fef3c7);
            padding: 1.5rem;
            border-left: 5px solid var(--accent-color);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2.5rem auto;
            display: block;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .quote {
            font-style: italic;
            font-size: 1.3rem;
            color: var(--primary-color);
            border-left: 4px solid var(--secondary-color);
            padding-left: 2rem;
            margin: 2.5rem 3rem;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: linear-gradient(135deg, #1e3a8a, #3b82f6);
            color: white;
            padding: 1.8rem;
            border-radius: 10px;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .stat-card i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--accent-color);
        }
        .stat-card h3 {
            color: white;
            font-size: 2.5rem;
            margin: 0.5rem 0;
        }
        .internal-links {
            background: #f0f9ff;
            border: 1px dashed #3b82f6;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .internal-links h3 {
            margin-top: 0;
        }
        .links-list {
            columns: 2;
            column-gap: 3rem;
        }
        .links-list a {
            display: block;
            color: var(--primary-color);
            text-decoration: none;
            padding: 0.5rem 0;
            transition: var(--transition);
        }
        .links-list a:hover {
            color: var(--secondary-color);
            padding-left: 0.5rem;
        }
        .user-interaction {
            background: #f8fafc;
            border-radius: 12px;
            padding: 2.5rem;
            margin: 3rem 0;
            border: 1px solid #e2e8f0;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .interaction-form label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .interaction-form input,
        .interaction-form textarea,
        .interaction-form select {
            width: 100%;
            padding: 0.9rem;
            margin-bottom: 1.5rem;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-size: 1rem;
        }
        .interaction-form button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .interaction-form button:hover {
            background: var(--secondary-color);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star-rating i {
            color: #d1d5db;
            cursor: pointer;
            font-size: 1.8rem;
            transition: var(--transition);
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: var(--accent-color);
        }
        footer {
            background: var(--primary-color);
            color: white;
            padding: 4rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        friend-link {
            display: block;
            margin-bottom: 1rem;
        }
        friend-link a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
        }
        friend-link a:hover {
            color: var(--accent-color);
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #374151;
            color: #9ca3af;
            font-size: 0.95rem;
        }
        .update-time {
            background: var(--accent-color);
            color: var(--text-dark);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            display: inline-block;
            font-weight: 600;
            margin: 1rem 0;
        }
        @media (max-width: 1024px) {
            .container {
                padding: 0 1rem;
            }
            article {
                padding: 2rem;
            }
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--bg-white);
                flex-direction: column;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                gap: 0;
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                width: 100%;
            }
            nav a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid #e5e7eb;
            }
            nav a::after {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .links-list {
                columns: 1;
            }
            .lead {
                font-size: 1.2rem;
                padding: 1rem;
            }
        }
        @media (max-width: 480px) {
            .search-box {
                flex-direction: column;
                border-radius: 12px;
                padding: 1rem;
            }
            .search-box input,
            .search-box button {
                border-radius: 8px;
                width: 100%;
            }
            .search-box input {
                margin-bottom: 1rem;
            }
            .user-interaction {
                padding: 1.5rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }