* {
            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, #f5f7fa 0%, #e4edf5 100%);
            background-attachment: fixed;
        }
        a {
            color: #d4af37;
            text-decoration: none;
            transition: color 0.3s ease, text-shadow 0.3s ease;
        }
        a:hover {
            color: #b8941f;
            text-shadow: 0 0 5px rgba(212, 175, 55, 0.3);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .site-header {
            background: linear-gradient(to right, #2c3e50, #4a6491);
            color: #fff;
            padding: 1.5rem 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: 2rem;
            font-weight: 800;
            color: #f0d87e;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo a:hover {
            color: #fff;
        }
        .my-logo i {
            color: #d4af37;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: rgba(212, 175, 55, 0.2);
            color: #f0d87e;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: #f8f9fa;
            padding: 0.8rem 20px;
            border-bottom: 1px solid #eaeaea;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: #7f8c8d;
        }
        .breadcrumb a {
            color: #7f8c8d;
        }
        .breadcrumb a:hover {
            color: #d4af37;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        .article-content {
            background-color: #fff;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        aside.sidebar {
            background-color: #fff;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: #2c3e50;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #d4af37;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #34495e;
            margin: 2.5rem 0 1.2rem 0;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ecf0f1;
        }
        h3 {
            font-size: 1.6rem;
            color: #4a6491;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            font-size: 1.3rem;
            color: #5d779c;
            margin: 1.5rem 0 0.8rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #4a6491;
            background-color: #f8f9fa;
            padding: 1.2rem;
            border-left: 5px solid #d4af37;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 1.5rem;
            border-left: 4px solid #d4af37;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
        .key-term {
            font-weight: 700;
            color: #2c3e50;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3em;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
        }
        .article-img figcaption {
            text-align: center;
            font-style: italic;
            color: #7f8c8d;
            padding: 0.8rem;
            background-color: #f8f9fa;
            font-size: 0.9rem;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget-title {
            font-size: 1.3rem;
            color: #2c3e50;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #d4af37;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem;
            border: 2px solid #d4af37;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-button {
            background-color: #d4af37;
            color: #fff;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background-color 0.3s ease;
        }
        .search-button:hover {
            background-color: #b8941f;
        }
        .link-list {
            list-style: none;
        }
        .link-list li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #ecf0f1;
        }
        .link-list a {
            display: block;
            padding: 0.3rem 0;
            color: #4a6491;
        }
        .link-list a:hover {
            color: #d4af37;
            padding-left: 5px;
        }
        .interaction-section {
            background-color: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin-top: 3rem;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #2c3e50;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #d4af37;
            box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
        }
        .rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 5px;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s ease;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffd700;
        }
        .submit-button {
            background: linear-gradient(to right, #d4af37, #b8941f);
            color: #fff;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .submit-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(184, 148, 31, 0.4);
        }
        .site-footer {
            background: linear-gradient(to right, #2c3e50, #34495e);
            color: #ecf0f1;
            padding: 3rem 0 1.5rem 0;
            margin-top: 3rem;
        }
        .footer-content {
            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: #f0d87e;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: #f0d87e;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #bdc3c7;
        }
        .footer-links a:hover {
            color: #d4af37;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: 6px;
            margin: 1rem 0;
            border-left: 4px solid #d4af37;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            aside.sidebar {
                position: static;
            }
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 1.5rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.8rem;
            }
            .main-nav a {
                display: block;
                padding: 0.8rem;
                border-radius: 6px;
                background-color: rgba(255, 255, 255, 0.05);
            }
            .article-content {
                padding: 1.8rem;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 2rem;
            }
            .lead {
                font-size: 1.1rem;
            }
            .interaction-section {
                padding: 1.5rem;
            }
        }