* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #e74c3c;
            --accent-color: #3498db;
            --light-bg: #f8f9fa;
            --dark-text: #2c3e50;
            --light-text: #7f8c8d;
            --border-color: #ecf0f1;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            background-color: #fff;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            padding: 1.5rem 0;
            border-bottom: 2px solid var(--border-color);
            margin-bottom: 2rem;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .my-logo:hover {
            color: var(--primary-color);
            transform: scale(1.02);
        }
        .search-form {
            flex-grow: 1;
            max-width: 400px;
            position: relative;
        }
        .search-input {
            width: 100%;
            padding: 12px 20px;
            border: 2px solid var(--border-color);
            border-radius: 30px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        .search-btn {
            position: absolute;
            right: 5px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--accent-color);
            color: white;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: var(--primary-color);
        }
        .main-nav {
            margin-top: 1.5rem;
            width: 100%;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .nav-list a {
            text-decoration: none;
            color: var(--dark-text);
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 5px;
            transition: var(--transition);
        }
        .nav-list a:hover,
        .nav-list a.active {
            background-color: var(--accent-color);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary-color);
        }
        .breadcrumb {
            margin: 1rem 0 2rem;
            padding: 0.8rem 1rem;
            background: var(--light-bg);
            border-radius: 8px;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: var(--accent-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2.5rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 0.7rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed var(--border-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--accent-color);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.05rem;
        }
        .lead {
            font-size: 1.25rem;
            color: var(--primary-color);
            font-weight: 600;
            background: var(--light-bg);
            padding: 1.5rem;
            border-left: 5px solid var(--accent-color);
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .content-img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .content-img:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }
        .content-link {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted var(--secondary-color);
            transition: var(--transition);
        }
        .content-link:hover {
            color: var(--primary-color);
            border-bottom-style: solid;
        }
        .interactive-section {
            background: var(--light-bg);
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            border-left: 6px solid var(--secondary-color);
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        .rating-form,
        .comment-form {
            display: grid;
            gap: 1.2rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 600;
            color: var(--primary-color);
        }
        .form-control {
            padding: 12px 15px;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
            font-family: inherit;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ffd700;
            cursor: pointer;
            margin: 0.5rem 0;
        }
        .star-rating i {
            transition: var(--transition);
        }
        .star-rating i:hover,
        .star-rating i.active {
            transform: scale(1.2);
            color: #ff9900;
        }
        .submit-btn {
            background: var(--secondary-color);
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            justify-self: start;
        }
        .submit-btn:hover {
            background: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .site-footer {
            border-top: 2px solid var(--border-color);
            padding: 2.5rem 0;
            margin-top: 3rem;
            text-align: center;
        }
        friend-link {
            display: block;
            margin: 2rem 0;
        }
        .friend-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        .friend-links a {
            color: var(--accent-color);
            text-decoration: none;
            padding: 8px 15px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            transition: var(--transition);
        }
        .friend-links a:hover {
            background: var(--accent-color);
            color: white;
            border-color: var(--accent-color);
        }
        .copyright {
            color: var(--light-text);
            font-size: 0.95rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
        }
        .update-time {
            color: var(--secondary-color);
            font-weight: 600;
            background: #ffeaea;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            display: inline-block;
            margin: 1rem 0;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 15px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .header-top {
                flex-direction: column;
                align-items: stretch;
            }
            .search-form {
                max-width: 100%;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 20px;
            }
            .main-nav {
                display: none;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                gap: 0.5rem;
            }
            article {
                padding: 1.5rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
        }
        @media print {
            .interactive-section,
            .site-footer,
            .search-form,
            .main-nav {
                display: none;
            }
            body {
                max-width: 100%;
                padding: 0;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
        }