* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e63946; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .site-header {
            background: #1a2b4c;
            color: white;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffcd00;
            text-transform: uppercase;
            letter-spacing: 2px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo:hover { text-decoration: none; color: #ffea00; }
        .mobile-toggle {
            display: none;
            background: none;
            border: 2px solid #ffcd00;
            color: #ffcd00;
            font-size: 1.5rem;
            padding: 8px 12px;
            border-radius: 5px;
            cursor: pointer;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 8px 5px;
            border-bottom: 3px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            text-decoration: none;
            border-bottom-color: #e63946;
        }
        .breadcrumb {
            background: #e9f1fa;
            padding: 12px 0;
            font-size: 0.9rem;
            margin-bottom: 30px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 10px;
            color: #888;
        }
        .search-module {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin: 30px 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 15px 20px;
            border: 2px solid #2c5aa0;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background: linear-gradient(to right, #2c5aa0, #e63946);
            color: white;
            border: none;
            padding: 0 30px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-weight: bold;
            font-size: 1.1rem;
            transition: transform 0.2s;
        }
        .search-btn:hover { transform: scale(1.03); }
        main { flex: 1; padding: 30px 0; }
        article { background: white; border-radius: 15px; padding: 40px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08); margin-bottom: 40px; }
        h1 { color: #1a2b4c; font-size: 2.8rem; margin-bottom: 25px; line-height: 1.2; border-left: 8px solid #ffcd00; padding-left: 20px; }
        h2 { color: #2c5aa0; font-size: 2.2rem; margin: 50px 0 25px; padding-bottom: 10px; border-bottom: 3px dashed #e9f1fa; }
        h3 { color: #e63946; font-size: 1.8rem; margin: 35px 0 15px; }
        h4 { color: #1a2b4c; font-size: 1.4rem; margin: 25px 0 12px; }
        p, li { margin-bottom: 1.2em; font-size: 1.1rem; color: #444; }
        .intro { font-size: 1.3rem; color: #555; background: #f0f8ff; padding: 25px; border-radius: 10px; margin-bottom: 40px; border-left: 5px solid #2c5aa0; }
        .highlight { background-color: #fffacd; padding: 3px 6px; border-radius: 3px; font-weight: bold; }
        .video-feature {
            margin: 40px 0;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        .video-placeholder {
            background: linear-gradient(45deg, #1a2b4c, #4a6491);
            height: 500px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 2rem;
            position: relative;
        }
        .video-placeholder i { font-size: 5rem; margin-bottom: 20px; display: block; }
        .img-caption { text-align: center; font-style: italic; color: #666; margin-top: 10px; font-size: 0.95rem; }
        ul, ol { padding-left: 30px; margin-bottom: 1.5em; }
        blockquote {
            border-left: 5px solid #ffcd00;
            background: #f9f9f9;
            padding: 25px;
            margin: 30px 0;
            font-style: italic;
            color: #555;
            border-radius: 0 10px 10px 0;
        }
        .user-interaction {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 60px 0;
        }
        .comment-box, .rating-box {
            background: #f8fafd;
            border-radius: 12px;
            padding: 30px;
            border: 2px solid #e1e8f2;
        }
        .module-title { font-size: 1.5rem; color: #1a2b4c; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
        textarea, select, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 15px;
            margin-bottom: 15px;
            border: 2px solid #ccd6e6;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        textarea:focus, select:focus, input:focus { border-color: #2c5aa0; outline: none; }
        .submit-btn {
            background: #2c5aa0;
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            font-size: 1.1rem;
            width: 100%;
            transition: background 0.3s;
        }
        .submit-btn:hover { background: #e63946; }
        .stars { display: flex; gap: 10px; margin: 15px 0; }
        .star { font-size: 2rem; color: #ddd; cursor: pointer; transition: color 0.2s; }
        .star:hover,
        .star.active { color: #ffcd00; }
        .site-footer {
            background: #1a2b4c;
            color: #ccd6e6;
            padding: 50px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo { font-size: 2rem; color: #ffcd00; margin-bottom: 15px; }
        .footer-links h4 { color: white; margin-bottom: 20px; }
        .footer-links ul { list-style: none; padding-left: 0; }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { color: #ccd6e6; }
        .footer-links a:hover { color: #ffcd00; }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: 8px;
            margin: 10px 0;
            border-left: 4px solid #ffcd00;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #2c5aa0;
            font-size: 0.9rem;
            color: #99aacc;
        }
        @media (max-width: 768px) {
            .header-top { flex-wrap: wrap; }
            .mobile-toggle { display: block; }
            .main-nav { width: 100%; order: 3; margin-top: 20px; display: none; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 10px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .video-placeholder { height: 300px; font-size: 1.5rem; }
            .video-placeholder i { font-size: 3rem; }
            article { padding: 25px; }
            .user-interaction { grid-template-columns: 1fr; }
        }