* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #fef9f0;
            color: #5a3921;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #d2691e;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #8b4513;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #8b4513 0%, #d2691e 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(139, 69, 19, 0.2);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo span {
            color: #ffd700;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #fff;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #fff9f0;
            padding: 0.8rem 20px;
            border-bottom: 1px solid #e6d5c3;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #a0522d;
        }
        .search-container {
            background-color: #fff5e6;
            padding: 2rem;
            text-align: center;
            border-bottom: 2px dashed #d2691e;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(210, 105, 30, 0.2);
        }
        .search-form input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background-color: #d2691e;
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background-color: #8b4513;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(139, 69, 19, 0.08);
        }
        .article-content h1 {
            color: #8b4513;
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffd700;
            padding-bottom: 1rem;
        }
        .article-content h2 {
            color: #a0522d;
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
        }
        .article-content h3 {
            color: #cd853f;
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        .article-content h4 {
            color: #d2691e;
            font-size: 1.3rem;
            margin: 1.8rem 0 0.8rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            color: #5a3921;
            font-weight: 600;
            background-color: #fffaf0;
            padding: 1.5rem;
            border-left: 5px solid #d2691e;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fffaf0;
            border-left: 4px solid #ffd700;
            padding: 1.2rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .key-term {
            font-weight: 800;
            color: #8b4513;
        }
        .stats-box {
            background: linear-gradient(to right, #f5deb3, #fdf5e6);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
            border: 2px solid #d2b48c;
        }
        .image-with-caption {
            margin: 2.5rem 0;
            text-align: center;
        }
        .image-with-caption img {
            border-radius: 10px;
            border: 5px solid #e6d5c3;
            max-height: 500px;
            object-fit: cover;
            width: 100%;
        }
        .caption {
            font-style: italic;
            color: #777;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .interactive-section {
            background-color: #f9f3e9;
            padding: 2rem;
            border-radius: 12px;
            margin: 2.5rem 0;
            border: 1px solid #e6d5c3;
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .stars .active {
            color: #ffd700;
        }
        textarea, input[type="text"], input[type="email"] {
            padding: 1rem;
            border: 1px solid #d2b48c;
            border-radius: 8px;
            font-size: 1rem;
            width: 100%;
        }
        button[type="submit"] {
            background-color: #d2691e;
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: bold;
            font-size: 1rem;
            transition: background 0.3s;
            align-self: flex-start;
        }
        button[type="submit"]:hover {
            background-color: #8b4513;
        }
        .sidebar {
            background-color: white;
            padding: 1.8rem;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(139, 69, 19, 0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: #8b4513;
            border-bottom: 2px solid #ffd700;
            padding-bottom: 0.5rem;
            margin-bottom: 1.2rem;
        }
        .toc ul {
            list-style: none;
            padding-left: 0;
        }
        .toc li {
            margin-bottom: 0.8rem;
            padding-left: 1rem;
            border-left: 3px solid transparent;
            transition: all 0.3s;
        }
        .toc li:hover {
            border-left-color: #d2691e;
        }
        .update-time {
            background-color: #f0fff0;
            padding: 1rem;
            border-radius: 8px;
            border: 1px solid #90ee90;
            margin-top: 2rem;
            font-size: 0.95rem;
        }
        .site-footer {
            background-color: #5a3921;
            color: #f5deb3;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h4 {
            color: #ffd700;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #f5deb3;
        }
        .footer-links a:hover {
            color: #ffd700;
        }
        friend-link {
            display: block;
            background-color: #6b4423;
            padding: 1rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        friend-link a {
            color: #ffd700;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #8b4513;
            font-size: 0.9rem;
            color: #d2b48c;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                display: none;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.5rem;
            }
            .article-content h1 {
                font-size: 2.2rem;
            }
            .article-content h2 {
                font-size: 1.8rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .sidebar {
                position: static;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .article-content > * {
            animation: fadeIn 0.5s ease-out forwards;
            opacity: 0;
        }
        .article-content > *:nth-child(n) {
            animation-delay: calc(0.05s * var(--i));
        }
        .stats-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 25px rgba(139, 69, 19, 0.15);
            transition: transform 0.3s, box-shadow 0.3s;
        }