* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e63946; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 2rem; margin: 1rem 0; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        .site-header {
            background: linear-gradient(90deg, #1a2a6c, #2c5aa0, #4a90e2);
            color: white;
            padding: 1rem 2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: 2px;
            background: linear-gradient(to right, #ffd166, #ff9e6d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }
        .my-logo:hover { transform: scale(1.03); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #ffd166;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: white;
        }
        .breadcrumb {
            background: #e9f1fa;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0dff0;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #1a2a6c; }
        .breadcrumb i { margin: 0 0.5rem; color: #888; }
        .container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            flex-grow: 1;
        }
        main { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 6px 20px rgba(0,0,0,0.08); }
        h1 { color: #1a2a6c; font-size: 2.8rem; margin-bottom: 1.5rem; border-bottom: 3px solid #ff9e6d; padding-bottom: 0.5rem; }
        h2 { color: #2c5aa0; font-size: 2rem; margin: 2.5rem 0 1rem; padding-left: 0.5rem; border-left: 5px solid #4a90e2; }
        h3 { color: #3a6fc3; font-size: 1.6rem; margin: 2rem 0 1rem; }
        h4 { color: #555; font-size: 1.3rem; margin: 1.5rem 0 0.8rem; }
        .article-intro { font-size: 1.2rem; color: #444; background: #f0f7ff; padding: 1.5rem; border-radius: 8px; margin-bottom: 2.5rem; border-left: 4px solid #2c5aa0; }
        .highlight { background: linear-gradient(120deg, #ffecb3 0%, #ffecb3 100%); padding: 0.2rem 0.4rem; border-radius: 3px; font-weight: 600; }
        .key-term { color: #e63946; font-weight: 700; }
        .quote {
            border-left: 4px solid #ff9e6d;
            padding-left: 1.5rem;
            margin: 2rem;
            font-style: italic;
            color: #555;
            background: #fff9f0;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .article-image {
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .caption { text-align: center; font-style: italic; color: #666; padding: 0.5rem; font-size: 0.95rem; }
        aside {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 140px;
        }
        .widget { margin-bottom: 2.5rem; }
        .widget-title {
            background: linear-gradient(90deg, #1a2a6c, #2c5aa0);
            color: white;
            padding: 0.8rem 1rem;
            border-radius: 6px;
            font-size: 1.2rem;
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .search-form { display: flex; }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem;
            border: 2px solid #d0dff0;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-button {
            background: linear-gradient(to right, #2c5aa0, #4a90e2);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-button:hover { background: linear-gradient(to right, #1a2a6c, #2c5aa0); }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            justify-content: center;
        }
        .stars .active { color: #ffc107; }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 0.9rem;
            border: 2px solid #e1e8f0;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        textarea:focus, input:focus { outline: none; border-color: #4a90e2; }
        .form-button {
            background: linear-gradient(to right, #28a745, #20c997);
            color: white;
            border: none;
            padding: 1rem;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.2s;
        }
        .form-button:hover { transform: translateY(-2px); }
        .link-list { list-style: none; padding-left: 0; }
        .link-list li { margin-bottom: 0.8rem; }
        .link-list a {
            display: flex;
            align-items: center;
            gap: 0.7rem;
            padding: 0.7rem;
            background: #f8fafc;
            border-radius: 6px;
            border-left: 4px solid #4a90e2;
        }
        .link-list a:hover { background: #e9f1fa; border-left-color: #e63946; }
        footer {
            background: #1a2a6c;
            color: #d0dff0;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-logo { font-size: 2rem; font-weight: bold; color: white; margin-bottom: 1rem; }
        .footer-section h3 { color: #ffd166; margin-bottom: 1.5rem; font-size: 1.3rem; }
        .friend-links { display: flex; flex-wrap: wrap; gap: 1rem; }
        friend-link a {
            background: rgba(255,255,255,0.1);
            color: #d0dff0;
            padding: 0.6rem 1.2rem;
            border-radius: 20px;
            font-size: 0.9rem;
            display: inline-block;
        }
        friend-link a:hover { background: rgba(255,255,255,0.2); color: white; }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #a0b8d0;
        }
        .last-updated {
            background: #fff9e6;
            padding: 1rem;
            border-radius: 6px;
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.95rem;
            color: #856404;
            border: 1px solid #ffeaa7;
        }
        @media (max-width: 1024px) {
            .container { grid-template-columns: 1fr; gap: 2rem; }
            aside { position: static; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #2c5aa0;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                border-radius: 0 0 10px 10px;
            }
            .main-nav.active ul { display: flex; }
            h1 { font-size: 2.2rem; }
            .container { padding: 0 1rem; }
            main { padding: 1.5rem; }
        }