* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #0066cc;
        }
        a:hover {
            color: #ff6600;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: bold; }
        .highlight {
            background-color: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a237e, #4a148c);
            color: white;
            padding: 15px 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 {
            font-size: 2.2rem;
            font-weight: 900;
            color: #ffeb3b;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            font-family: 'Arial Black', sans-serif;
        }
        .my-logo:hover {
            color: #ff9800;
            transform: scale(1.05);
            transition: transform 0.3s;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav li {
            margin-left: 25px;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .main-nav a:hover {
            background-color: rgba(255,255,255,0.2);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: #e8eaf6;
            padding: 10px 20px;
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #1a237e;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 30px;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 20px;
            border-bottom: 3px solid #ffeb3b;
            padding-bottom: 10px;
        }
        h2 {
            font-size: 2rem;
            color: #4a148c;
            margin: 25px 0 15px;
            padding-left: 10px;
            border-left: 5px solid #ff9800;
        }
        h3 {
            font-size: 1.6rem;
            color: #303f9f;
            margin: 20px 0 12px;
        }
        h4 {
            font-size: 1.3rem;
            color: #5c6bc0;
            margin: 15px 0 10px;
        }
        p {
            margin-bottom: 18px;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .intro {
            font-size: 1.2rem;
            color: #555;
            background-color: #f0f4ff;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 25px;
        }
        .section-spacing {
            margin-top: 40px;
        }
        .article-image {
            margin: 25px auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .article-image img {
            width: 100%;
            transition: transform 0.5s;
        }
        .article-image:hover img {
            transform: scale(1.03);
        }
        .sidebar {
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar h3 {
            font-size: 1.4rem;
            color: #1a237e;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid #ffeb3b;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #4a148c;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-button {
            background: #4a148c;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-button:hover {
            background: #ff6600;
        }
        .comment-form, .rating-form {
            background: #f9f9ff;
            padding: 20px;
            border-radius: 8px;
            margin-top: 20px;
        }
        .form-group {
            margin-bottom: 15px;
        }
        .form-label {
            display: block;
            margin-bottom: 5px;
            font-weight: 600;
            color: #333;
        }
        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-input:focus, .form-textarea:focus, .form-select:focus {
            border-color: #4a148c;
            outline: none;
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            background: linear-gradient(to right, #1a237e, #4a148c);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s, transform 0.2s;
        }
        .submit-button:hover {
            background: linear-gradient(to right, #ff6600, #ff9800);
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ffcc00;
            cursor: pointer;
        }
        .star-rating i:hover {
            color: #ff9800;
        }
        .site-footer {
            background: #1a237e;
            color: white;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
            margin-bottom: 30px;
            padding-right: 20px;
        }
        .footer-section h4 {
            color: #ffeb3b;
            font-size: 1.3rem;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: #ff9800;
        }
        friend-link {
            display: inline-block;
            background: #4a148c;
            color: white;
            padding: 8px 15px;
            margin: 5px 10px 5px 0;
            border-radius: 5px;
            font-size: 0.9rem;
            transition: all 0.3s;
        }
        friend-link:hover {
            background: #ff6600;
            transform: scale(1.05);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #3949ab;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .my-logo {
                margin-bottom: 15px;
                font-size: 1.8rem;
            }
            .main-nav {
                width: 100%;
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                width: 100%;
            }
            .main-nav li {
                margin: 5px 0;
            }
            .main-nav a {
                display: block;
                padding: 12px;
                background: rgba(255,255,255,0.1);
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .content-wrapper {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .article-content {
                padding: 20px;
            }
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .tip-box {
            background: #e8f5e9;
            border-left: 5px solid #4caf50;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        .quote {
            font-style: italic;
            color: #555;
            border-left: 4px solid #ff9800;
            padding-left: 20px;
            margin: 25px 0;
        }
        .update-time {
            font-size: 0.9rem;
            color: #777;
            background: #f0f0f0;
            padding: 5px 10px;
            border-radius: 3px;
            display: inline-block;
            margin-bottom: 20px;
        }