* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            min-height: 100vh;
            padding: 0;
            margin: 0;
        }
        a { text-decoration: none; color: #2c3e50; transition: color 0.3s; }
        a:hover { color: #e74c3c; }
        img { max-width: 100%; height: auto; display: block; }
        header {
            background: #2c3e50;
            color: white;
            padding: 1rem 2rem;
            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;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            color: #fff;
            text-transform: uppercase;
            letter-spacing: 2px;
            font-family: 'Georgia', serif;
            background: linear-gradient(90deg, #e74c3c, #f1c40f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            padding: 0.5rem;
        }
        .my-logo:hover { transform: scale(1.05); }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }
        nav a:hover {
            background: #34495e;
            color: #f1c40f;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background: #ecf0f1;
            padding: 1rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid #bdc3c7;
        }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb a:hover { color: #2c3e50; }
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 3fr 1fr;
            gap: 3rem;
        }
        main {
            background: white;
            padding: 3rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        article h1 {
            font-size: 3.2rem;
            color: #2c3e50;
            margin-bottom: 1.5rem;
            border-bottom: 5px solid #e74c3c;
            padding-bottom: 0.5rem;
        }
        article h2 {
            font-size: 2.2rem;
            color: #34495e;
            margin: 2.5rem 0 1rem;
            padding-left: 1rem;
            border-left: 6px solid #f1c40f;
        }
        article h3 {
            font-size: 1.8rem;
            color: #16a085;
            margin: 2rem 0 1rem;
        }
        article h4 {
            font-size: 1.4rem;
            color: #8e44ad;
            margin: 1.5rem 0 0.8rem;
        }
        article p {
            margin-bottom: 1.8rem;
            text-align: justify;
            font-size: 1.1rem;
            color: #555;
        }
        article b {
            color: #c0392b;
            font-weight: 800;
        }
        .highlight-box {
            background: #f8f9fa;
            border-left: 6px solid #3498db;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
        }
        .image-container {
            text-align: center;
            margin: 3rem 0;
            padding: 1rem;
            background: #f1f8ff;
            border-radius: 12px;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            margin: 0 auto;
        }
        .update-time {
            font-style: italic;
            color: #7f8c8d;
            text-align: right;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 2px dashed #bdc3c7;
        }
        aside {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.06);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .function-box {
            margin-bottom: 2.5rem;
        }
        .function-box h3 {
            color: #2c3e50;
            margin-bottom: 1.2rem;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .function-box form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .function-box input, .function-box textarea, .function-box select {
            padding: 0.9rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .function-box input:focus, .function-box textarea:focus, .function-box select:focus {
            border-color: #3498db;
            outline: none;
        }
        .function-box button {
            padding: 1rem;
            background: #2c3e50;
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s;
        }
        .function-box button:hover {
            background: #e74c3c;
        }
        .rating-stars {
            display: flex;
            justify-content: space-around;
            font-size: 2rem;
            color: #f1c40f;
            cursor: pointer;
            margin-bottom: 1rem;
        }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 2rem 2rem;
            margin-top: 4rem;
            border-top: 8px solid #e74c3c;
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h4 {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            color: #f1c40f;
        }
        .friend-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        friend-link {
            display: block;
            padding: 0.8rem;
            background: #34495e;
            border-radius: 6px;
            text-align: center;
            transition: transform 0.3s;
        }
        friend-link:hover {
            transform: translateX(10px);
            background: #3d566e;
        }
        friend-link a {
            color: #ecf0f1;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid #4a6278;
            font-size: 0.95rem;
            color: #bdc3c7;
        }
        @media (max-width: 992px) {
            .container { grid-template-columns: 1fr; }
            aside { position: static; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #34495e;
                padding: 1rem;
                border-radius: 10px;
                margin-top: 1rem;
            }
            nav ul.active { display: flex; }
            .hamburger { display: block; }
            article h1 { font-size: 2.5rem; }
            article h2 { font-size: 1.9rem; }
            main, aside { padding: 2rem; }
        }
        @media (max-width: 480px) {
            .container, header, .breadcrumb { padding: 1rem; }
            article h1 { font-size: 2rem; }
        }