* { 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: 1920px;
            margin: 0 auto;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4, h5, h6 { color: #2c3e50; margin-bottom: 1rem; font-weight: 700; line-height: 1.3; }
        h1 { font-size: 2.8rem; margin-top: 2rem; text-align: center; border-bottom: 4px solid #3498db; padding-bottom: 1rem; }
        h2 { font-size: 2.2rem; margin-top: 3rem; color: #2980b9; padding-left: 0.5rem; border-left: 5px solid #e74c3c; }
        h3 { font-size: 1.8rem; margin-top: 2.5rem; color: #34495e; }
        h4 { font-size: 1.4rem; margin-top: 2rem; color: #7f8c8d; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; text-align: justify; }
        a { color: #3498db; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e74c3c; text-decoration: underline; }
        strong { color: #2c3e50; font-weight: 700; }
        em { font-style: italic; }
        blockquote {
            border-left: 4px solid #3498db;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #ecf0f1;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        ul, ol { margin: 1.5rem 0 1.5rem 2rem; }
        li { margin-bottom: 0.8rem; }
        .site-header {
            background: linear-gradient(135deg, #1a2980, #26d0ce);
            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;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover { text-decoration: none; color: #f1c40f; }
        .my-logo i { font-size: 2.5rem; }
        .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;
            transition: background 0.3s;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255,255,255,0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background-color: #ecf0f1;
            font-size: 0.95rem;
        }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb a:hover { color: #3498db; }
        .breadcrumb span { color: #95a5a6; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem;
            max-width: 1600px;
            margin: 0 auto;
        }
        article { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .search-widget {
            background: #2c3e50;
            color: white;
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 2rem;
        }
        .search-widget h3 { color: #f1c40f; margin-top: 0; }
        .search-form { display: flex; }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-btn {
            background: #e74c3c;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-btn:hover { background: #c0392b; }
        aside .widget {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        .widget h3 { font-size: 1.3rem; margin-top: 0; color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 0.5rem; }
        .link-list a {
            display: block;
            padding: 0.8rem 0;
            border-bottom: 1px dashed #eee;
            color: #555;
        }
        .link-list a:last-child { border-bottom: none; }
        .link-list a:hover { color: #e74c3c; padding-left: 10px; }
        .user-interaction { margin-top: 3rem; padding-top: 2rem; border-top: 2px solid #ecf0f1; }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        .interaction-form {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 8px;
            border: 1px solid #ddd;
        }
        .interaction-form h3 { margin-top: 0; }
        .form-group { margin-bottom: 1.5rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #2c3e50; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        textarea { min-height: 150px; resize: vertical; }
        .submit-btn {
            background: #27ae60;
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 4px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s;
            display: inline-block;
        }
        .submit-btn:hover { background: #219653; }
        .star-rating { direction: rtl; font-size: 2rem; display: inline-block; }
        .star-rating input { display: none; }
        .star-rating label { color: #ddd; cursor: pointer; padding: 0 2px; }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label { color: #f1c40f; }
        .content-highlight {
            background: linear-gradient(to right, #ffeaa7, #fab1a0);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border-left: 5px solid #e74c3c;
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .infobox {
            float: right;
            width: 300px;
            background: #e3f2fd;
            border: 2px solid #3498db;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 0 0 1.5rem 1.5rem;
        }
        .infobox h4 { margin-top: 0; color: #1a5276; }
        .update-time {
            text-align: right;
            font-size: 0.9rem;
            color: #7f8c8d;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            max-width: 1600px;
            margin: 0 auto;
        }
        .footer-logo { font-size: 1.8rem; font-weight: bold; color: #f1c40f; margin-bottom: 1rem; }
        .footer-links a { display: block; color: #bdc3c7; padding: 0.3rem 0; }
        .footer-links a:hover { color: #f1c40f; }
        friend-link {
            display: inline-block;
            background: #34495e;
            color: white;
            padding: 0.5rem 1rem;
            margin: 0.5rem;
            border-radius: 4px;
            text-decoration: none;
        }
        friend-link:hover { background: #3498db; text-decoration: none; }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #4a6278;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-content { grid-template-columns: 1fr; gap: 2rem; }
            .infobox { float: none; width: 100%; margin: 1.5rem 0; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-container { flex-direction: column; align-items: flex-start; }
            .main-nav { width: 100%; margin-top: 1rem; display: none; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 0.5rem; }
            .hamburger { display: block; align-self: flex-end; margin-top: -3rem; }
            .breadcrumb, .main-content, .site-footer { padding: 1rem; }
            article { padding: 1.5rem; }
            .interaction-grid { grid-template-columns: 1fr; }
        }