*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #2c3e50;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-weight: 700; color: #1a5276; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); border-bottom: 4px solid #3498db; padding-bottom: 0.5rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); color: #2874a6; margin-top: 2.5rem; }
        h3 { font-size: clamp(1.4rem, 3vw, 1.9rem); color: #2e86c1; }
        h4 { font-size: 1.3rem; color: #5dade2; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; }
        a { color: #2980b9; text-decoration: none; transition: color 0.3s ease, background-color 0.3s ease; }
        a:hover { color: #1b4f72; }
        strong { color: #1a5276; }
        em { color: #7d3c98; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a5276 0%, #3498db 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-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo a {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo a:hover { color: #d6eaf8; }
        .logo-icon { color: #f1c40f; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover, .main-nav a:focus {
            background-color: rgba(255, 255, 255, 0.2);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #eaf2f8;
            padding: 0.8rem 0;
            font-size: 0.95rem;
            border-bottom: 1px solid #d4e6f1;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: #7fb3d5;
        }
        .hero {
            background: linear-gradient(rgba(26, 82, 118, 0.85), rgba(52, 152, 219, 0.85)), url('https://images.unsplash.com/photo-1632501641765-e568d28b001f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: 4rem 1rem;
            text-align: center;
            margin-bottom: 2.5rem;
            border-radius: 0 0 20px 20px;
        }
        .hero h1 { color: #f1c40f; border: none; }
        .search-section {
            background-color: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 2.5rem 0;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex-grow: 1;
            padding: 1rem;
            border: 2px solid #3498db;
            border-radius: 8px 0 0 8px;
            font-size: 1.1rem;
        }
        .search-form button {
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 1rem 1.8rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: bold;
            transition: background-color 0.3s;
        }
        .search-form button:hover { background-color: #27ae60; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 768px) {
            .main-content { grid-template-columns: 1fr; }
        }
        article { background-color: white; padding: 2.5rem; border-radius: 15px; box-shadow: 0 8px 25px rgba(0,0,0,0.06); }
        .featured-img {
            width: 100%;
            border-radius: 12px;
            margin: 2rem auto;
            border: 5px solid #d6eaf8;
        }
        .article-section { margin-bottom: 3rem; }
        .highlight-box {
            background-color: #e8f6f3;
            border-left: 5px solid #1abc9c;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .link-list a {
            display: block;
            background-color: #f0f8ff;
            padding: 1rem;
            border-radius: 8px;
            border: 1px solid #bbdefb;
            text-align: center;
            font-weight: 600;
        }
        .link-list a:hover {
            background-color: #d6eaf8;
            transform: translateY(-3px);
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        aside {
            background-color: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.06);
            align-self: start;
            position: sticky;
            top: 140px;
        }
        .widget { margin-bottom: 2.5rem; }
        .widget h3 { border-bottom: 2px solid #aed6f1; padding-bottom: 0.5rem; }
        .interactive-form { background-color: #f9f9f9; padding: 1.8rem; border-radius: 10px; margin-top: 1.5rem; }
        .interactive-form label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .interactive-form input, .interactive-form textarea, .interactive-form select {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1.2rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-family: inherit;
        }
        .interactive-form button {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            transition: background-color 0.3s;
        }
        .interactive-form button:hover { background-color: #2980b9; }
        .star-rating { display: flex; gap: 0.3rem; margin-bottom: 1rem; }
        .star-rating input { display: none; }
        .star-rating label { font-size: 1.8rem; color: #ddd; cursor: pointer; margin: 0; }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #f1c40f; }
        .site-footer {
            background: linear-gradient(135deg, #1a5276 0%, #2c3e50 100%);
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-section h3 { color: #f1c40f; border-bottom: 2px solid #3498db; padding-bottom: 0.5rem; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a { color: #bdc3c7; }
        .footer-links a:hover { color: #f1c40f; }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 6px;
            margin-bottom: 0.8rem;
            border-left: 4px solid #3498db;
        }
        friend-link a { color: #85c1e9; font-weight: bold; }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        @media (max-width: 992px) {
            .main-nav ul { gap: 1rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: #1a5276;
                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; }
            .header-container { flex-wrap: wrap; }
        }
        @media (max-width: 480px) {
            article, aside { padding: 1.5rem; }
            .hero { padding: 2.5rem 1rem; }
            h1 { font-size: 2rem; }
        }
        .last-updated { font-style: italic; color: #7d7d7d; background-color: #fef9e7; padding: 0.5rem; border-radius: 5px; display: inline-block; margin-bottom: 1.5rem; }
        .emoji { font-size: 1.2em; }
        .float-right { float: right; margin: 0 0 1rem 1.5rem; max-width: 300px; }
        .clearfix::after { content: ""; clear: both; display: table; }