* { 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%);
            background-attachment: fixed;
        }
        a { text-decoration: none; color: #c00a2b; transition: color 0.3s ease, transform 0.2s ease; }
        a:hover { color: #8a001f; transform: translateY(-2px); }
        img { max-width: 100%; height: auto; display: block; border-radius: 8px; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 800; }
        .highlight { background-color: #fffacd; padding: 2px 5px; border-radius: 3px; }
        .emoji { font-size: 1.2em; }
        .main-header {
            background: linear-gradient(90deg, #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 a {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(45deg, #ff7e5f, #feb47b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: 1px;
        }
        .my-logo a:hover { transform: scale(1.05); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e6e6e6;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #ff7e5f;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after,
        .main-nav a:focus::after { width: 100%; }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: #fff;
            border-radius: 2px;
            transition: 0.3s;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f0f4f8;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #888;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #c00a2b; }
        main { padding: 2rem 0; }
        article { background-color: white; border-radius: 12px; padding: 2.5rem; box-shadow: 0 5px 25px rgba(0, 0, 0, 0.06); }
        h1 {
            font-size: 2.8rem;
            color: #1a1a2e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #c00a2b;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #16213e;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eaeaea;
        }
        h3 {
            font-size: 1.6rem;
            color: #333;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            hyphens: auto;
        }
        .intro {
            font-size: 1.2rem;
            color: #444;
            background: #f8f9ff;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid #4dabf7;
            margin-bottom: 2rem;
        }
        .img-container {
            margin: 2rem auto;
            text-align: center;
        }
        .img-container img {
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
            transition: transform 0.5s ease, box-shadow 0.5s ease;
        }
        .img-container img:hover {
            transform: scale(1.02);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
        }
        .caption {
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .user-actions {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #dee2e6;
        }
        .user-actions h3 { color: #1a1a2e; text-align: center; }
        .action-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .action-card {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            text-align: center;
        }
        .action-card i { font-size: 2rem; color: #c00a2b; margin-bottom: 1rem; }
        .action-card form { display: flex; flex-direction: column; gap: 1rem; }
        .action-card input, .action-card textarea, .action-card select {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
        }
        .action-card button {
            background: linear-gradient(45deg, #c00a2b, #e63946);
            color: white;
            border: none;
            padding: 0.9rem;
            border-radius: 5px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .action-card button:hover { background: linear-gradient(45deg, #8a001f, #c00a2b); }
        .stars { display: flex; justify-content: center; gap: 5px; margin: 1rem 0; }
        .stars i { color: #ffc107; cursor: pointer; font-size: 1.5rem; }
        .related-links {
            background: #eef2f7;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2.5rem 0;
        }
        .related-links h3 { margin-top: 0; }
        .related-links ul { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 0.8rem; }
        .related-links li { padding: 0.5rem 0; border-bottom: 1px dashed #b0bec5; }
        .related-links li:last-child { border-bottom: none; }
        .related-links a::before { content: '🎯'; margin-right: 8px; }
        footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #ff7e5f;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        .footer-section ul { list-style: none; }
        .footer-section ul li { margin-bottom: 0.7rem; }
        .footer-section a { color: #b0bec5; }
        .footer-section a:hover { color: #ff7e5f; }
        friend-link {
            display: block;
            padding: 0.8rem;
            background: #0f3460;
            margin: 0.5rem 0;
            border-radius: 5px;
            transition: background 0.3s;
        }
        friend-link:hover { background: #16213e; }
        friend-link a { color: #4dabf7; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .hamburger { display: flex; }
            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid #2d3748;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            article { padding: 1.5rem; }
            .action-grid { grid-template-columns: 1fr; }
        }