* { 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-color: #f8f9fa;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-family: 'Georgia', serif; color: #1a365d; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: 2.8rem; margin-top: 1.5rem; border-bottom: 4px solid #e63946; padding-bottom: 0.5rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; padding-left: 0.5rem; border-left: 5px solid #2a9d8f; }
        h3 { font-size: 1.8rem; margin-top: 2rem; color: #264653; }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; color: #457b9d; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; text-align: justify; }
        .lead { font-size: 1.3rem; font-weight: 500; color: #555; }
        .highlight { background-color: #fff3cd; padding: 0.2rem 0.5rem; border-radius: 3px; font-weight: 600; }
        b, strong { color: #1a365d; }
        a { color: #e63946; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #1a365d; text-decoration: underline; }
        ul, ol { margin-bottom: 1.5rem; padding-left: 2rem; }
        li { margin-bottom: 0.5rem; }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin-top: 30px;
        }
        @media (max-width: 992px) {
            .main-grid { grid-template-columns: 1fr; }
        }
        header { background-color: #1a365d; color: white; padding: 1rem 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: 'Impact', sans-serif; font-size: 2.2rem; color: #e63946; text-decoration: none; letter-spacing: 1px; }
        .my-logo:hover { color: #fff; text-decoration: none; }
        .hamburger { display: none; font-size: 1.8rem; background: none; border: none; color: white; cursor: pointer; }
        .main-nav ul { display: flex; list-style: none; }
        .main-nav li { margin-left: 2rem; }
        .main-nav a { color: white; font-weight: 500; padding: 0.5rem 0; }
        .main-nav a:hover { color: #e63946; text-decoration: none; border-bottom: 2px solid #e63946; }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav { position: fixed; top: 70px; left: -100%; width: 80%; height: calc(100vh - 70px); background-color: #1a365d; transition: left 0.3s ease; padding: 2rem; box-shadow: 2px 0 5px rgba(0,0,0,0.2); overflow-y: auto; }
            .main-nav.active { left: 0; }
            .main-nav ul { flex-direction: column; }
            .main-nav li { margin: 0 0 1.5rem 0; }
        }
        .breadcrumb { padding: 1rem 0; background-color: #edf2f7; font-size: 0.9rem; }
        .breadcrumb a { color: #4a5568; }
        .breadcrumb a:hover { color: #e63946; }
        .breadcrumb span { color: #718096; }
        .content-area { background: white; padding: 2.5rem; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .info-card { background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%); border-left: 5px solid #2a9d8f; padding: 1.5rem; margin: 2rem 0; border-radius: 0 8px 8px 0; }
        .code-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; margin: 2rem 0; }
        .code-item { background: #1a365d; color: white; padding: 1.2rem; border-radius: 8px; text-align: center; font-family: monospace; font-size: 1.2rem; letter-spacing: 1px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); transition: transform 0.3s ease; }
        .code-item:hover { transform: translateY(-5px); background-color: #2d4a7a; }
        .featured-img { width: 100%; border-radius: 10px; margin: 2rem auto; border: 3px solid #ddd; box-shadow: 0 8px 16px rgba(0,0,0,0.1); }
        .sidebar { background: white; padding: 2rem; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); align-self: start; position: sticky; top: 100px; }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-widget h3 { font-size: 1.4rem; margin-top: 0; border-bottom: 2px solid #e63946; padding-bottom: 0.5rem; }
        .search-form, .comment-form, .rating-form { display: flex; flex-direction: column; gap: 1rem; }
        .search-form { flex-direction: row; }
        .search-form input { flex-grow: 1; padding: 0.8rem; border: 2px solid #cbd5e0; border-radius: 5px; font-size: 1rem; }
        .search-form button { padding: 0.8rem 1.5rem; background-color: #e63946; color: white; border: none; border-radius: 5px; cursor: pointer; font-weight: bold; transition: background 0.3s; }
        .search-form button:hover { background-color: #c1121f; }
        .form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.8rem; border: 2px solid #cbd5e0; border-radius: 5px; font-size: 1rem; }
        .form-group textarea { min-height: 150px; resize: vertical; }
        .submit-btn { background-color: #2a9d8f; color: white; padding: 1rem 2rem; border: none; border-radius: 5px; cursor: pointer; font-size: 1.1rem; font-weight: bold; transition: background 0.3s; }
        .submit-btn:hover { background-color: #21867a; }
        .star-rating { display: flex; flex-direction: row-reverse; justify-content: flex-end; font-size: 2rem; color: #ddd; cursor: pointer; }
        .star-rating input { display: none; }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label { color: #ffc107; }
        .comments-section { margin-top: 3rem; border-top: 2px solid #e2e8f0; padding-top: 2rem; }
        .comment { background: #f8f9fa; padding: 1.5rem; border-radius: 8px; margin-bottom: 1.5rem; border-left: 4px solid #457b9d; }
        .comment-author { font-weight: bold; color: #1a365d; }
        .comment-date { font-size: 0.9rem; color: #718096; }
        .rating-summary { display: flex; align-items: center; gap: 1rem; background: #edf2f7; padding: 1rem; border-radius: 8px; margin-bottom: 1.5rem; }
        .avg-rating { font-size: 2.5rem; font-weight: bold; color: #1a365d; }
        footer { background-color: #1a365d; color: #cbd5e0; margin-top: 4rem; padding: 3rem 0 1.5rem; }
        .footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
        .footer-section h3 { color: white; font-size: 1.3rem; margin-bottom: 1.5rem; }
        friend-link { display: block; margin-bottom: 0.8rem; }
        friend-link a { color: #cbd5e0; }
        friend-link a:hover { color: #e63946; }
        .copyright { text-align: center; margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid #2d3748; font-size: 0.9rem; color: #a0aec0; }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mt-3 { margin-top: 1.5rem; }
        .update-time { font-style: italic; color: #718096; background-color: #fefce8; padding: 0.5rem; border-radius: 5px; display: inline-block; margin-bottom: 2rem; }
        .emoji { font-size: 1.2em; }
        .hidden { display: none; }