* { 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-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: #4a6fa5; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #2c497f; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .emoji { font-size: 1.2em; }
        .site-header {
            background: linear-gradient(135deg, #1a2b4c 0%, #2c3e6e 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #6c8cd5; }
        .my-logo a { color: inherit; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .main-nav a {
            color: #d1d8e6;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(255,255,255,0.15);
            color: white;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: #2c3e6e;
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: 0 10px 15px rgba(0,0,0,0.2);
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a {
            color: #d1d8e6;
            padding: 0.8rem;
            border-bottom: 1px solid #3a4f8a;
        }
        .mobile-nav a:hover { background-color: #3a4f8a; color: white; }
        .breadcrumb {
            background: #e9ecef;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb span { color: #777; }
        .search-bar {
            background: #f1f3f5;
            padding: 2rem 20px;
            margin: 1rem auto;
            border-radius: 8px;
            max-width: 800px;
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-form input {
            flex: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #ccc;
            border-radius: 50px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .search-form input:focus {
            outline: none;
            border-color: #4a6fa5;
        }
        .search-form button {
            background: linear-gradient(to right, #4a6fa5, #2c497f);
            color: white;
            border: none;
            padding: 0 2rem;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            transition: transform 0.2s;
        }
        .search-form button:hover { transform: scale(1.05); }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            font-size: 2.5rem;
            color: #1a2b4c;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #2c3e6e;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #e9ecef;
        }
        h3 {
            font-size: 1.6rem;
            color: #3a4f8a;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #4a6fa5;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: #555;
            font-weight: 500;
            background: #f8f9fa;
            padding: 1.2rem;
            border-left: 5px solid #4a6fa5;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f0f7ff 0%, #e3eeff 100%);
            border: 1px solid #c3d7f2;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .figure {
            margin: 2.5rem auto;
            text-align: center;
        }
        .figure img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            border: 1px solid #ddd;
            max-height: 500px;
            object-fit: cover;
        }
        .figcaption {
            margin-top: 0.8rem;
            font-style: italic;
            color: #666;
            font-size: 0.95rem;
        }
        .link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1.5rem 0;
            padding: 1.5rem;
            background: #f8f9fa;
            border-radius: 8px;
        }
        .link-list a {
            background: white;
            padding: 0.6rem 1.2rem;
            border-radius: 50px;
            border: 1px solid #ddd;
            font-weight: 600;
        }
        .link-list a:hover {
            background: #4a6fa5;
            color: white;
            border-color: #4a6fa5;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-title {
            font-size: 1.3rem;
            color: #2c3e6e;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e9ecef;
        }
        .rating-section, .comment-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e9ecef;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .star-rating i {
            color: #ffc107;
            cursor: pointer;
            font-size: 1.8rem;
            transition: transform 0.2s;
        }
        .star-rating i:hover { transform: scale(1.2); }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #4a6fa5;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(to right, #4a6fa5, #2c497f);
            color: white;
            border: none;
            padding: 0.9rem 2.5rem;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 12px rgba(42, 81, 156, 0.3);
        }
        .site-footer {
            background: #1a2b4c;
            color: #d1d8e6;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-title {
            color: white;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a {
            color: #b0bcd8;
            transition: color 0.3s;
        }
        .footer-links a:hover { color: white; }
        friend-link {
            display: block;
            margin-top: 1rem;
            padding: 1rem;
            background: rgba(255,255,255,0.05);
            border-radius: 6px;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2c3e6e;
            font-size: 0.9rem;
            color: #8a9bc1;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            .article-content { padding: 1.5rem; }
            .main-nav ul { display: none; }
            .hamburger { display: block; }
            .search-form { flex-direction: column; }
            .search-form button { padding: 0.9rem; }
        }