* { 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: 1.6;
            color: #333;
            background-color: #f8f9fa;
            max-width: 1600px;
            margin: 0 auto;
            padding: 0 10px;
        }
        a { color: #4a6ee0; text-decoration: none; transition: color 0.2s; }
        a:hover { color: #e63946; }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; padding-right: 15px; padding-left: 15px; margin-right: auto; margin-left: auto; }
        .visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
        .site-header {
            background: linear-gradient(135deg, #4a6ee0 0%, #6a8eff 100%);
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #FFD700; }
        .my-logo:hover { color: #FFD700; }
        .main-nav { display: flex; align-items: center; }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .nav-list a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
        }
        .nav-list a:hover, .nav-list a.active {
            background-color: rgba(255, 255, 255, 0.2);
            color: #FFD700;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #666;
        }
        .breadcrumb a { color: #4a6ee0; }
        .breadcrumb span { color: #999; }
        .content-main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 2rem 0;
        }
        .article-content { background: white; padding: 2rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .sidebar { background: white; padding: 1.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); height: fit-content; }
        h1, h2, h3, h4 { color: #2a3f8f; margin-top: 1.5em; margin-bottom: 0.5em; line-height: 1.2; }
        h1 { font-size: 2.5rem; border-bottom: 3px solid #4a6ee0; padding-bottom: 0.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.6rem; }
        h4 { font-size: 1.3rem; }
        p, li { margin-bottom: 1.2rem; font-size: 1.1rem; }
        .lead { font-size: 1.3rem; color: #555; font-weight: 500; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        blockquote {
            border-left: 4px solid #4a6ee0;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
        }
        .img-container {
            margin: 2rem auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border: 1px solid #eee;
        }
        .caption { font-size: 0.9rem; color: #777; margin-top: 0.5rem; }
        ul, ol { padding-left: 2rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.5rem; }
        .internal-link { color: #2a3f8f; font-weight: 600; border-bottom: 1px dotted; }
        .internal-link:hover { color: #e63946; border-bottom-style: solid; }
        .search-box { margin-bottom: 2rem; }
        .search-form { display: flex; }
        .search-input {
            flex-grow: 1;
            padding: 12px 15px;
            border: 2px solid #4a6ee0;
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background: #4a6ee0;
            color: white;
            border: none;
            border-radius: 0 30px 30px 0;
            padding: 0 20px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        .search-btn:hover { background: #2a3f8f; }
        .rating-form, .comment-form {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            border: 1px solid #dee2e6;
        }
        .form-group { margin-bottom: 1rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        input[type="text"], input[type="email"], textarea, select {
            width: 100%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
            font-family: inherit;
        }
        textarea { min-height: 150px; resize: vertical; }
        .star-rating { display: flex; gap: 5px; font-size: 1.5rem; color: #ddd; cursor: pointer; margin-bottom: 1rem; }
        .star-rating .star:hover,
        .star-rating .star:hover ~ .star { color: #ddd; }
        .star-rating .star.active { color: #FFD700; }
        .submit-btn {
            background: #4a6ee0;
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .submit-btn:hover { background: #2a3f8f; }
        .widget { margin-bottom: 2rem; }
        .widget-title {
            font-size: 1.3rem;
            color: #2a3f8f;
            border-bottom: 2px solid #4a6ee0;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .link-list { list-style: none; padding-left: 0; }
        .link-list li { margin-bottom: 0.75rem; padding-bottom: 0.75rem; border-bottom: 1px dashed #eee; }
        .link-list a { display: block; padding: 5px 0; }
        .site-footer {
            background: #2a3f8f;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
            border-radius: 12px 12px 0 0;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 { color: #FFD700; border-bottom: 1px solid #4a6ee0; padding-bottom: 0.5rem; }
        .footer-section ul { list-style: none; padding-left: 0; }
        .footer-section ul li { margin-bottom: 0.5rem; }
        .footer-section a { color: #ccc; }
        .footer-section a:hover { color: #FFD700; }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.1);
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a6ee0;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-main { grid-template-columns: 1fr; }
            .sidebar { order: -1; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #4a6ee0;
                padding: 1rem;
                border-radius: 0 0 10px 10px;
                box-shadow: 0 5px 10px rgba(0,0,0,0.1);
            }
            .main-nav.active .nav-list {
                display: flex;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
        }
        .text-center { text-align: center; }
        .mt-3 { margin-top: 3rem; }
        .mb-3 { margin-bottom: 3rem; }
        .last-updated { font-size: 0.9rem; color: #777; font-style: italic; margin-top: 2rem; padding-top: 1rem; border-top: 1px solid #eee; }