* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f9f7ff 0%, #eef2ff 100%);
            min-height: 100vh;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: #4f46e5; text-decoration: none; transition: color 0.3s ease, transform 0.2s ease; }
        a:hover { color: #7c3aed; transform: translateY(-1px); }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(90deg, #1e1b4b 0%, #312e81 100%);
            color: white;
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .logo a {
            font-family: 'Comic Sans MS', cursive, sans-serif;
            font-size: 2.2rem;
            font-weight: 800;
            color: #fbbf24;
            text-shadow: 2px 2px 0 #7c3aed;
            letter-spacing: 1px;
        }
        .logo a:hover { color: #fcd34d; }
        .nav-desktop {
            display: flex;
            gap: 2rem;
            align-items: center;
        }
        .nav-desktop a {
            color: #e0e7ff;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 6px;
        }
        .nav-desktop a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: white;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: #312e81;
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            box-shadow: 0 10px 15px rgba(0,0,0,0.2);
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a {
            color: #e0e7ff;
            padding: 1rem;
            border-bottom: 1px solid #4f46e5;
        }
        .mobile-nav a:last-child { border-bottom: none; }
        .breadcrumb {
            background: #eef2ff;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid #c7d2fe;
        }
        .breadcrumb a { color: #5b21b6; }
        .breadcrumb span { color: #6b7280; }
        .search-container {
            max-width: 800px;
            margin: 2.5rem auto;
            padding: 0 2rem;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(79, 70, 229, 0.2);
        }
        .search-input {
            flex-grow: 1;
            padding: 1.2rem 1.8rem;
            border: none;
            font-size: 1.1rem;
            background: white;
        }
        .search-input:focus { outline: none; }
        .search-btn {
            background: linear-gradient(90deg, #8b5cf6, #4f46e5);
            color: white;
            border: none;
            padding: 0 2.5rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background 0.3s ease;
        }
        .search-btn:hover { background: linear-gradient(90deg, #7c3aed, #4338ca); }
        .main-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        @media (max-width: 1024px) {
            .main-container { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            border-radius: 20px;
            padding: 3rem;
            box-shadow: 0 15px 50px rgba(0, 0, 0, 0.08);
        }
        .sidebar {
            background: white;
            border-radius: 20px;
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 3.2rem;
            color: #1e1b4b;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #fbbf24;
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #312e81;
            margin: 3rem 0 1.5rem;
            padding-left: 1rem;
            border-left: 6px solid #8b5cf6;
        }
        h3 {
            font-size: 1.7rem;
            color: #5b21b6;
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #7c3aed;
            margin: 2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.15rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.4rem;
            color: #4f46e5;
            font-weight: 600;
            background: #eef2ff;
            padding: 1.5rem;
            border-radius: 12px;
            margin: 2.5rem 0;
            border-left: 5px solid #8b5cf6;
        }
        .highlight {
            background: linear-gradient(120deg, #fef3c7 0%, #fef3c7 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .note {
            background: #f0f9ff;
            border-left: 5px solid #0ea5e9;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
            margin: 3rem 0;
        }
        .stat-card {
            background: linear-gradient(135deg, #a78bfa, #7c3aed);
            color: white;
            padding: 1.8rem;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 8px 20px rgba(124, 58, 237, 0.3);
        }
        .stat-card h3 { color: white; margin-top: 0; border-left: none; padding: 0; }
        .featured-image {
            width: 100%;
            border-radius: 18px;
            margin: 3rem auto;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
            border: 8px solid white;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, #8b5cf6, #4f46e5);
            color: white;
            padding: 1rem 2.2rem;
            border-radius: 50px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            box-shadow: 0 6px 15px rgba(79, 70, 229, 0.4);
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(79, 70, 229, 0.5);
            color: white;
        }
        .interactive-list {
            list-style: none;
            margin: 2.5rem 0;
        }
        .interactive-list li {
            padding: 1.2rem 1.5rem;
            margin-bottom: 1rem;
            background: white;
            border-left: 5px solid #8b5cf6;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
        }
        .interactive-list li:hover {
            transform: translateX(10px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .user-feedback {
            background: #fafafa;
            border-radius: 20px;
            padding: 3rem;
            margin-top: 4rem;
            border: 2px solid #e5e7eb;
        }
        .rating-form, .comment-form {
            margin-bottom: 3rem;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            font-size: 2.5rem;
            gap: 0.5rem;
            margin: 1.5rem 0;
        }
        .star-rating input { display: none; }
        .star-rating label {
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #fbbf24; }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 1.2rem;
            margin: 1rem 0;
            border: 2px solid #d1d5db;
            border-radius: 10px;
            font-size: 1.1rem;
            transition: border 0.3s ease;
        }
        textarea:focus, input:focus {
            outline: none;
            border-color: #8b5cf6;
        }
        .related-links h3 { font-size: 1.5rem; }
        .related-links ul {
            list-style: none;
            margin-top: 1.5rem;
        }
        .related-links li {
            margin-bottom: 1.2rem;
            padding-bottom: 1.2rem;
            border-bottom: 1px dashed #d1d5db;
        }
        .update-time {
            background: #fef3c7;
            padding: 1.5rem;
            border-radius: 12px;
            text-align: center;
            margin-top: 2rem;
            font-weight: 600;
            color: #92400e;
        }
        footer {
            background: #1e1b4b;
            color: #e0e7ff;
            padding: 4rem 2rem 2rem;
            margin-top: 5rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-links h4 {
            color: #fbbf24;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links ul { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #c7d2fe; }
        friend-link {
            display: block;
            background: #312e81;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            border-left: 5px solid #fbbf24;
        }
        .copyright {
            text-align: center;
            padding-top: 3rem;
            margin-top: 3rem;
            border-top: 1px solid #374151;
            font-size: 0.95rem;
            color: #9ca3af;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .nav-desktop { display: none; }
            .mobile-menu-btn { display: block; }
            h1 { font-size: 2.5rem; }
            h2 { font-size: 1.9rem; }
            .article-content { padding: 2rem; }
            .main-container { padding: 0 1rem; }
            .search-container { padding: 0 1rem; }
        }