* {
            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: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #2c5282;
            transition: color 0.3s ease, transform 0.2s ease;
        }
        a:hover {
            color: #1a365d;
            transform: translateY(-2px);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .site-header {
            background: linear-gradient(to right, #1a365d, #2c5282);
            color: white;
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 2px;
            background: linear-gradient(90deg, #ffd700, #ffed4e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }
        .nav-desktop a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ffd700;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: #2c5282;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 0.8rem;
            border-bottom: 1px solid #4a6fa5;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid #cbd5e0;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        .breadcrumb a:hover {
            color: #2d3748;
        }
        .breadcrumb span {
            color: #718096;
        }
        .search-container {
            padding: 2rem;
            text-align: center;
            background: white;
            margin: 1rem auto;
            max-width: 800px;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            justify-content: center;
            align-items: center;
        }
        .search-input {
            flex-grow: 1;
            max-width: 500px;
            padding: 0.9rem 1.2rem;
            border: 2px solid #cbd5e0;
            border-radius: 50px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .search-input:focus {
            outline: none;
            border-color: #2c5282;
        }
        .search-button {
            background: linear-gradient(to right, #38b2ac, #319795);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 50px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s, transform 0.2s;
        }
        .search-button:hover {
            background: linear-gradient(to right, #319795, #2c7a7b);
            transform: translateY(-3px);
        }
        .main-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        article {
            background: white;
            padding: 3rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
        }
        h1 {
            font-size: 3.2rem;
            color: #1a365d;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #ffd700;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #2c5282;
            margin-top: 3rem;
            margin-bottom: 1.2rem;
            padding-left: 0.8rem;
            border-left: 5px solid #38b2ac;
        }
        h3 {
            font-size: 1.8rem;
            color: #4a5568;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #718096;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            font-style: italic;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 600;
            color: #2d3748;
            background: #f7fafc;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #ffd700;
        }
        .highlight {
            background: linear-gradient(120deg, #ffed4e30 0%, #ffed4e30 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .feature-img {
            width: 100%;
            margin: 2.5rem 0;
            text-align: center;
        }
        .feature-img figcaption {
            font-style: italic;
            color: #718096;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .quote {
            font-style: italic;
            font-size: 1.2rem;
            color: #4a5568;
            border-left: 4px solid #e53e3e;
            padding-left: 1.5rem;
            margin: 2.5rem;
            background: #fff5f5;
            padding: 1.5rem;
            border-radius: 0 10px 10px 0;
        }
        .stats-box {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2rem;
            border-radius: 12px;
            margin: 2rem 0;
            text-align: center;
        }
        .link-list {
            background: #f0fff4;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            border: 1px solid #c6f6d5;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 0.8rem;
        }
        .link-list li:before {
            content: "🃏";
            margin-right: 0.5rem;
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: #2c5282;
            font-size: 1.5rem;
            margin-top: 0;
            border-bottom: 2px solid #cbd5e0;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #e2e8f0;
        }
        .update-time {
            font-size: 0.9rem;
            color: #718096;
            background: #f7fafc;
            padding: 0.8rem;
            border-radius: 6px;
            text-align: center;
            margin-top: 2rem;
        }
        .update-time i {
            color: #38b2ac;
            margin-right: 0.5rem;
        }
        .interactive-section {
            background: white;
            padding: 3rem;
            border-radius: 15px;
            margin: 3rem auto;
            max-width: 1000px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
        }
        .interactive-section h2 {
            text-align: center;
            border: none;
            padding-left: 0;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            margin-top: 2rem;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            justify-content: center;
            font-size: 2.5rem;
            color: #ffd700;
            cursor: pointer;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 600;
            color: #4a5568;
        }
        .form-group input, .form-group textarea {
            padding: 1rem;
            border: 2px solid #cbd5e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-group input:focus, .form-group textarea:focus {
            outline: none;
            border-color: #38b2ac;
        }
        .submit-button {
            background: linear-gradient(to right, #ed8936, #dd6b20);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            align-self: center;
            min-width: 200px;
        }
        .submit-button:hover {
            background: linear-gradient(to right, #dd6b20, #c05621);
            transform: translateY(-3px);
        }
        .site-footer {
            background: #1a202c;
            color: #cbd5e0;
            padding: 3rem 2rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .footer-section h4 {
            color: #ffd700;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            font-style: normal;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #90cdf4;
        }
        friend-link a:hover {
            color: #63b3ed;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.6rem;
            }
            article, .interactive-section {
                padding: 2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                width: 100%;
            }
        }
        @media (max-width: 480px) {
            .main-container, .site-header, .breadcrumb {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            h1 {
                font-size: 2rem;
            }
            .lead {
                font-size: 1.1rem;
            }
        }