* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fefefe;
            max-width: 100%;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        h1, h2, h3, h4 {
            font-family: Georgia, 'Times New Roman', Times, serif;
            color: #2c3e50;
            margin-top: 1.5em;
            margin-bottom: 0.75em;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid #8e44ad;
            padding-bottom: 0.3em;
        }
        h2 {
            font-size: 2.2rem;
            color: #3498db;
        }
        h3 {
            font-size: 1.8rem;
            color: #16a085;
        }
        h4 {
            font-size: 1.4rem;
            color: #e67e22;
        }
        p {
            margin-bottom: 1.5em;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 300;
            color: #555;
            margin-bottom: 2em;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2em 0.4em;
            border-radius: 3px;
        }
        strong {
            color: #c0392b;
        }
        em {
            font-style: italic;
            color: #7d3c98;
        }
        blockquote {
            border-left: 5px solid #3498db;
            padding-left: 1.5em;
            margin: 2em 0;
            font-style: italic;
            color: #555;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 30px 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 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: 'Trebuchet MS', sans-serif;
            font-size: 2.2rem;
            font-weight: bold;
            text-decoration: none;
            color: #fff;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            color: #f39c12;
            margin-right: 10px;
        }
        .my-logo span {
            color: #9b59b6;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav li {
            margin-left: 1.8rem;
        }
        .main-nav a {
            color: #ecf0f1;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover, .main-nav a:focus {
            background-color: #8e44ad;
            color: white;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: #1a1a2e;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            .main-nav.active ul {
                display: flex;
            }
            .main-nav li {
                margin: 0.5rem 0;
            }
            .hamburger {
                display: block;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f8f9fa;
            border-bottom: 1px solid #dee2e6;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #6c757d;
        }
        .breadcrumb a {
            color: #3498db;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .sidebar {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #3498db;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            margin-top: 0;
            color: #2c3e50;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 0.8rem;
        }
        .sidebar a {
            color: #2980b9;
            text-decoration: none;
            display: block;
            padding: 0.3rem 0;
            border-bottom: 1px dotted #ddd;
        }
        .sidebar a:hover {
            color: #e74c3c;
            border-bottom-color: #e74c3c;
        }
        .feature-box {
            background: #ffffff;
            border: 2px solid #e3e3e3;
            border-radius: 10px;
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .feature-box h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feature-box form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .feature-box input, .feature-box textarea, .feature-box select {
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        .feature-box button {
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            transition: background-color 0.3s;
            align-self: flex-start;
        }
        .feature-box button:hover {
            background-color: #27ae60;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #f1c40f;
            margin: 0.5rem 0;
        }
        .star-rating label {
            cursor: pointer;
        }
        .star-rating input {
            display: none;
        }
        .article-img {
            margin: 2em auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .article-img figcaption {
            text-align: center;
            font-style: italic;
            color: #7f8c8d;
            padding: 0.5rem;
            background-color: #f9f9f9;
        }
        .content-links {
            margin: 1.5em 0;
            padding: 1em;
            background-color: #e8f4fc;
            border-radius: 8px;
        }
        .content-links a {
            color: #2980b9;
            text-decoration: none;
            font-weight: 600;
        }
        .content-links a:hover {
            text-decoration: underline;
        }
        .update-time {
            font-size: 0.9rem;
            color: #95a5a6;
            text-align: right;
            margin-top: 3em;
            padding-top: 1em;
            border-top: 1px dashed #bdc3c7;
        }
        .site-footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h4 {
            color: #f39c12;
            margin-top: 0;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #3498db;
            text-decoration: none;
        }
        friend-link a:hover {
            color: #e74c3c;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .lead { font-size: 1.1rem; }
            .container { padding: 0 15px; }
        }
        .my-logo, .main-nav a, .feature-box button, .sidebar a, friend-link a {
            transition: all 0.3s ease;
        }
        .article-img img {
            transition: transform 0.5s ease;
        }
        .article-img img:hover {
            transform: scale(1.03);
        }