* { 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: #f8f9fa;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        h1, h2, h3, h4 { color: #1a365d; margin-bottom: 1rem; font-weight: 700; }
        h1 { font-size: 2.8rem; border-bottom: 3px solid #2a9d8f; padding-bottom: 0.5rem; margin-top: 2rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; border-left: 5px solid #e76f51; padding-left: 15px; }
        h3 { font-size: 1.8rem; margin-top: 1.8rem; color: #264653; }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; color: #2a9d8f; }
        p { margin-bottom: 1.2rem; font-size: 1.1rem; }
        a { color: #2a9d8f; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e76f51; text-decoration: underline; }
        strong { color: #264653; }
        em { color: #555; }
        .container { display: grid; grid-template-columns: 1fr; gap: 2rem; }
        header { background: linear-gradient(135deg, #1a365d 0%, #2a9d8f 100%); color: white; padding: 1.5rem 0; border-radius: 0 0 12px 12px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
        .logo-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
        .my-logo { font-size: 2.2rem; font-weight: 800; color: white; display: flex; align-items: center; gap: 10px; }
        .my-logo i { color: #e76f51; }
        .my-logo:hover { text-decoration: none; }
        nav ul { display: flex; list-style: none; flex-wrap: wrap; gap: 1.5rem; }
        nav a { color: white; font-weight: 500; padding: 8px 12px; border-radius: 6px; }
        nav a:hover, nav a.active { background: rgba(255,255,255,0.15); text-decoration: none; }
        .hamburger { display: none; font-size: 1.8rem; background: none; border: none; color: white; cursor: pointer; }
        main { display: grid; grid-template-columns: 3fr 1fr; gap: 2.5rem; }
        article { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        aside { background: white; padding: 1.8rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); align-self: start; }
        .article-image { width: 100%; height: auto; border-radius: 8px; margin: 1.5rem 0; border: 1px solid #ddd; }
        figure { margin: 2rem 0; text-align: center; }
        figcaption { font-style: italic; color: #666; margin-top: 0.5rem; }
        ul, ol { margin-left: 1.8rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.7rem; }
        table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
        th, td { padding: 12px 15px; border: 1px solid #ddd; text-align: left; }
        th { background: #1a365d; color: white; }
        tr:nth-child(even) { background: #f2f2f2; }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        input, textarea, select {
            width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 6px; font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus { outline: none; border-color: #2a9d8f; box-shadow: 0 0 0 3px rgba(42,157,143,0.2); }
        button, .btn {
            background: #2a9d8f; color: white; border: none; padding: 12px 24px; border-radius: 6px;
            cursor: pointer; font-weight: 600; display: inline-flex; align-items: center; gap: 8px;
            transition: background 0.3s, transform 0.2s;
        }
        button:hover, .btn:hover { background: #21867a; transform: translateY(-2px); text-decoration: none; }
        .btn-secondary { background: #e76f51; }
        .btn-secondary:hover { background: #d65c40; }
        .rating { display: flex; gap: 5px; margin: 1rem 0; }
        .rating i { color: #ffc107; font-size: 1.3rem; cursor: pointer; }
        .card { background: #f8f9fa; border-left: 4px solid #2a9d8f; padding: 1.2rem; margin: 1.5rem 0; border-radius: 0 8px 8px 0; }
        .social-share { display: flex; gap: 1rem; margin: 2rem 0; }
        .social-share a {
            background: #f1f1f1; color: #555; width: 44px; height: 44px; border-radius: 50%;
            display: flex; align-items: center; justify-content: center; transition: all 0.3s;
        }
        .social-share a:hover { background: #2a9d8f; color: white; transform: scale(1.1); }
        .back-to-top {
            position: fixed; bottom: 25px; right: 25px; background: #1a365d; color: white;
            width: 50px; height: 50px; border-radius: 50%; display: flex; align-items: center;
            justify-content: center; font-size: 1.3rem; opacity: 0; visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s; z-index: 1000;
        }
        .back-to-top.visible { opacity: 1; visibility: visible; }
        footer { background: #1a365d; color: white; padding: 2.5rem 0; margin-top: 3rem; border-radius: 12px 12px 0 0; }
        .footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
        .footer-section h3 { color: white; border-bottom: 2px solid #2a9d8f; padding-bottom: 0.5rem; }
        friend-link { display: block; margin: 0.7rem 0; }
        friend-link a { color: #ddd; }
        friend-link a:hover { color: #2a9d8f; }
        .copyright { text-align: center; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid #2a9d8f; color: #aaa; font-size: 0.9rem; }
        @media (max-width: 1024px) {
            main { grid-template-columns: 1fr; }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .logo-bar { flex-direction: column; align-items: flex-start; gap: 1rem; }
            nav ul { display: none; flex-direction: column; width: 100%; margin-top: 1rem; }
            nav ul.show { display: flex; }
            .hamburger { display: block; }
            article, aside { padding: 1.5rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .social-share { justify-content: center; }
            input, textarea, button, .btn { min-height: 44px; }
        }
        @media (max-width: 480px) {
            body { padding: 0 10px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .my-logo { font-size: 1.8rem; }
        }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .highlight { background: #fff3cd; padding: 1rem; border-radius: 6px; border-left: 4px solid #ffc107; }
        .emoji { font-size: 1.2em; }