:root {
            --primary-color: #8B4513;
            --secondary-color: #D4AF37;
            --accent-color: #228B22;
            --dark-bg: #2C3E50;
            --light-bg: #F8F9FA;
            --text-dark: #2D3748;
            --text-light: #718096;
            --border-color: #E2E8F0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--light-bg);
            padding-top: 80px;
        }
        header {
            background-color: var(--dark-bg);
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--secondary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        nav {
            display: flex;
            gap: 30px;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: var(--transition);
        }
        nav a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
        }
        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        article {
            background: white;
            border-radius: 8px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--dark-bg);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--text-dark);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--text-light);
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            line-height: 1.7;
        }
        ul, ol {
            margin-left: 20px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 10px;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 20px 0;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
        }
        .card {
            background: white;
            border-radius: 8px;
            padding: 25px;
            margin: 25px 0;
            border-left: 4px solid var(--secondary-color);
            box-shadow: var(--shadow);
        }
        .tip-card {
            background-color: #F0F9FF;
            border-left-color: var(--accent-color);
        }
        .update-card {
            background-color: #FFF7ED;
            border-left-color: #ED8936;
        }
        aside {
            position: sticky;
            top: 100px;
            height: fit-content;
        }
        .sidebar-section {
            background: white;
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 25px;
            box-shadow: var(--shadow);
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin: 20px 0;
        }
        input, textarea, select {
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
            min-height: 44px;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        button, .btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            min-height: 44px;
            min-width: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        button:hover, .btn:hover {
            background-color: #B8860B;
            transform: translateY(-2px);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .star {
            font-size: 1.5rem;
            color: #E2E8F0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #FBBF24;
        }
        .comment {
            background: var(--light-bg);
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
            border-left: 3px solid var(--border-color);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
        }
        .comment-author {
            font-weight: 600;
            color: var(--primary-color);
        }
        .comment-date {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .social-sharing {
            display: flex;
            gap: 15px;
            margin: 30px 0;
            flex-wrap: wrap;
        }
        .social-btn {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .facebook { background-color: #1877F2; color: white; }
        .twitter { background-color: #1DA1F2; color: white; }
        .reddit { background-color: #FF4500; color: white; }
        .social-btn:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--secondary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: var(--shadow);
            transition: var(--transition);
            z-index: 999;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            background-color: #B8860B;
        }
        footer {
            background-color: var(--dark-bg);
            color: white;
            padding: 50px 20px 30px;
            margin-top: 60px;
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-section h3 {
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #CBD5E0;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            padding: 10px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            margin: 5px 0;
        }
        .copyright {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #CBD5E0;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 70px;
            }
            .header-container {
                height: 70px;
                padding: 0 15px;
            }
            nav {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background-color: var(--dark-bg);
                flex-direction: column;
                padding: 20px;
                gap: 10px;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
            }
            nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .hamburger {
                display: flex;
            }
            article {
                padding: 25px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .social-sharing {
                justify-content: center;
            }
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 44px;
                height: 44px;
            }
        }
        @media (max-width: 480px) {
            .header-container {
                padding: 0 10px;
            }
            article {
                padding: 20px 15px;
            }
            .sidebar-section {
                padding: 20px;
            }
            .card {
                padding: 20px;
            }
        }
        .text-center { text-align: center; }
        .mb-20 { margin-bottom: 20px; }
        .mb-30 { margin-bottom: 30px; }
        .mt-30 { margin-top: 30px; }
        .highlight { color: var(--secondary-color); font-weight: 600; }
        .last-updated { font-style: italic; color: var(--text-light); font-size: 0.9rem; }
        .info-box { background: #E6F7FF; padding: 15px; border-radius: 6px; margin: 20px 0; border-left: 4px solid #1890FF; }
        .warning { background: #FFFBE6; border-left-color: #FAAD14; }