* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #2c3e50;
            background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #2980b9;
            text-decoration: none;
            transition: color 0.3s ease, border-bottom 0.3s ease;
        }
        a:hover {
            color: #e74c3c;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            border: 0;
        }
        .site-header {
            background: linear-gradient(135deg, #1a2980 0%, #26d0ce 100%);
            color: white;
            padding: 1.5rem 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-family: 'Blackadder ITC', cursive, sans-serif;
            font-size: 2.8rem;
            font-weight: bold;
            color: #f1c40f;
            text-shadow: 3px 3px 0 #8b4513;
            letter-spacing: 2px;
        }
        .my-logo a {
            color: inherit;
        }
        .my-logo a:hover {
            color: #ffd700;
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-list a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            border-bottom: 3px solid transparent;
        }
        .nav-list a:hover, .nav-list a:focus {
            background-color: rgba(255,255,255,0.15);
            border-bottom-color: #f1c40f;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: #ecf0f1;
            padding: 1rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #bdc3c7;
        }
        .breadcrumb a {
            color: #7f8c8d;
        }
        .breadcrumb a:hover {
            color: #e74c3c;
        }
        .breadcrumb span {
            color: #34495e;
            font-weight: 600;
        }
        .search-container {
            margin: 2rem auto;
            max-width: 600px;
            padding: 0 20px;
        }
        .search-form {
            display: flex;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            background: white;
        }
        .search-input:focus {
            outline: none;
            box-shadow: inset 0 0 0 2px #3498db;
        }
        .search-button {
            background: linear-gradient(to right, #e74c3c, #c0392b);
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .search-button:hover {
            background: linear-gradient(to right, #c0392b, #a93226);
        }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            padding: 3rem;
            margin-bottom: 2rem;
        }
        h1 {
            color: #1a2980;
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 5px solid #f1c40f;
            padding-bottom: 1rem;
        }
        h2 {
            color: #2980b9;
            font-size: 2.4rem;
            margin: 2.5rem 0 1rem;
            padding-top: 1rem;
            border-top: 2px dashed #bdc3c7;
        }
        h3 {
            color: #16a085;
            font-size: 1.8rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #8e44ad;
            font-size: 1.4rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.15rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.4rem;
            color: #2c3e50;
            font-weight: 300;
            background: #f8f9fa;
            padding: 1.5rem;
            border-left: 5px solid #3498db;
            margin-bottom: 2rem;
            border-radius: 0 8px 8px 0;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #7f8c8d;
            font-size: 0.95rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #ecf0f1;
        }
        .update-time {
            color: #e74c3c;
            font-weight: bold;
        }
        .img-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            border: 5px solid #fff;
        }
        .img-container img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .img-container img:hover {
            transform: scale(1.03);
        }
        .img-caption {
            font-style: italic;
            color: #7f8c8d;
            padding: 0.8rem;
            background: #f8f9fa;
            font-size: 0.95rem;
        }
        .related-links {
            background: #ecf0f1;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            border-left: 5px solid #3498db;
        }
        .related-links h3 {
            color: #2c3e50;
            margin-top: 0;
        }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1rem;
            margin-top: 1rem;
        }
        .link-card {
            background: white;
            padding: 1rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            border: 1px solid #bdc3c7;
        }
        .link-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 7px 15px rgba(0,0,0,0.1);
            border-color: #3498db;
        }
        .link-card a {
            color: #2c3e50;
            font-weight: 600;
            display: block;
        }
        .link-card a:hover {
            color: #e74c3c;
        }
        .user-interaction {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 3px solid #ecf0f1;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 1.5rem;
        }
        .comment-form, .rating-form {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            border: 1px solid #dee2e6;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #2c3e50;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #f1c40f;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #ddd;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #f1c40f;
        }
        .submit-btn {
            background: linear-gradient(to right, #27ae60, #229954);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 5px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, #229954, #1e8449);
            box-shadow: 0 5px 15px rgba(34, 153, 84, 0.3);
        }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #f1c40f;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid #34495e;
            padding-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #bdc3c7;
        }
        .footer-links a:hover {
            color: #f1c40f;
            padding-left: 5px;
            transition: all 0.3s ease;
        }
        friend-link {
            display: block;
            background: #34495e;
            padding: 1rem;
            border-radius: 5px;
            margin-bottom: 0.8rem;
            border-left: 4px solid #3498db;
        }
        friend-link a {
            color: #ecf0f1;
            font-weight: 600;
        }
        friend-link a:hover {
            color: #f1c40f;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.2rem; }
            .my-logo { font-size: 2.4rem; }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #1a2980;
                flex-direction: column;
                padding: 1rem 0;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                text-align: center;
            }
            .nav-list.active {
                display: flex;
            }
            .nav-list li {
                margin: 0.5rem 0;
            }
            article {
                padding: 2rem;
            }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 15px;
            }
            article {
                padding: 1.5rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .lead {
                font-size: 1.2rem;
            }
        }