* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f9f7f0 0%, #fff9e6 100%);
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { color: #c41e3a; font-weight: 800; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); text-align: center; margin: 2rem 0; border-bottom: 4px solid #ffcc00; padding-bottom: 1rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); border-left: 6px solid #ffcc00; padding-left: 15px; margin-top: 2.5rem; }
        h3 { font-size: clamp(1.4rem, 3vw, 1.9rem); color: #e67e22; margin-top: 2rem; }
        h4 { font-size: 1.3rem; color: #27ae60; margin-top: 1.5rem; }
        p { margin-bottom: 1.2rem; font-size: 1.1rem; }
        strong { color: #c41e3a; font-weight: 800; }
        em { color: #16a085; }
        .lead { font-size: 1.3rem; font-weight: 500; color: #555; text-align: center; max-width: 900px; margin: 0 auto 2rem; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.5rem; border-radius: 4px; }
        .site-header {
            background: linear-gradient(to right, #c41e3a, #e74c3c);
            color: white;
            padding: 1rem 0;
            border-radius: 0 0 15px 15px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
            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;
            text-decoration: none;
            color: #ffcc00;
            text-shadow: 2px 2px 0 #c41e3a;
            font-family: 'Trebuchet MS', sans-serif;
            padding: 0.5rem;
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .nav-list a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            transition: all 0.3s;
            background-color: rgba(255,255,255,0.1);
        }
        .nav-list a:hover,
        .nav-list a:focus {
            background-color: #ffcc00;
            color: #c41e3a;
            transform: translateY(-3px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            padding: 1rem 0;
            margin-bottom: 2rem;
            font-size: 0.95rem;
            color: #7f8c8d;
            border-bottom: 1px solid #eee;
        }
        .breadcrumb a {
            color: #3498db;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .breadcrumb i { margin: 0 0.5rem; }
        .search-container {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: 2px solid #ffcc00;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background: linear-gradient(to right, #e67e22, #f39c12);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 0 50px 50px 0;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }
        .search-btn:hover {
            background: linear-gradient(to right, #d35400, #e67e22);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 15px;
            border: 1px solid #eaeaea;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: #2c3e50;
            border-bottom: 3px solid #c41e3a;
            padding-bottom: 0.5rem;
            margin-top: 0;
        }
        .link-list {
            list-style: none;
            margin-top: 1rem;
        }
        .link-list li { margin-bottom: 0.8rem; }
        .link-list a {
            color: #2980b9;
            text-decoration: none;
            display: block;
            padding: 0.5rem;
            border-radius: 5px;
            transition: all 0.2s;
        }
        .link-list a:hover {
            background-color: #e3f2fd;
            padding-left: 1rem;
            color: #c41e3a;
        }
        .featured-image {
            width: 100%;
            border-radius: 12px;
            margin: 2rem auto;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            border: 5px solid white;
        }
        .interaction-section {
            background: #f1f8ff;
            padding: 2rem;
            border-radius: 15px;
            margin: 3rem 0;
            border-left: 6px solid #3498db;
        }
        .interaction-section h3 { color: #2980b9; }
        .rating, .comment-form {
            margin-bottom: 2rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s, transform 0.2s;
        }
        .star:hover,
        .star.active { color: #ffcc00; transform: scale(1.1); }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #2c3e50;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #bdc3c7;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            border-color: #3498db;
            outline: none;
        }
        .submit-btn {
            background: linear-gradient(to right, #27ae60, #2ecc71);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, #229954, #27ae60);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(39, 174, 96, 0.3);
        }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            border-radius: 15px 15px 0 0;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #ffcc00;
            border-bottom: 2px solid #c41e3a;
            padding-bottom: 0.5rem;
            margin-top: 0;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.1);
            margin-bottom: 0.8rem;
            padding: 0.8rem;
            border-radius: 5px;
            transition: background 0.3s;
        }
        friend-link a {
            color: #3498db;
            text-decoration: none;
            font-weight: 600;
        }
        friend-link:hover {
            background: rgba(255,255,255,0.2);
        }
        friend-link a:hover { color: #ffcc00; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        .update-time {
            text-align: center;
            font-style: italic;
            color: #95a5a6;
            margin: 1rem 0;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .main-nav {
                width: 100%;
                margin-top: 1rem;
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                gap: 0.5rem;
            }
            .nav-list a {
                display: block;
                text-align: center;
                border-radius: 8px;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.2rem;
                right: 1rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input, .search-btn {
                border-radius: 50px;
                margin-bottom: 0.5rem;
            }
            .article-content {
                padding: 1.5rem;
            }
        }