*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: #f8f9fc;
            color: #1e1e2a;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img, video { max-width: 100%; height: auto; display: block; }
        a { color: #2b6cb0; text-decoration: none; transition: color 0.2s; }
        a:hover { color: #1a365d; text-decoration: underline; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: #0f172a; margin-top: 1.8rem; margin-bottom: 0.75rem; }
        h1 { font-size: 2.2rem; margin-top: 0.5rem; }
        h2 { font-size: 1.7rem; border-bottom: 3px solid #e2e8f0; padding-bottom: 0.4rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1.2rem; }
        ul, ol { margin-bottom: 1.2rem; padding-left: 1.6rem; }
        li { margin-bottom: 0.4rem; }
        strong { font-weight: 700; color: #0f172a; }
        blockquote {
            border-left: 5px solid #2b6cb0;
            background: #edf2f7;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
        }
        code { background: #e2e8f0; padding: 0.1rem 0.4rem; border-radius: 4px; font-size: 0.9em; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.2rem; }
        .site-header {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 16px rgba(0,0,0,0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: #facc15;
            letter-spacing: -0.5px;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo:hover { color: #fde047; text-decoration: none; }
        .my-logo i { font-size: 1.4rem; }
        .nav-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            display: none;
            padding: 0.2rem 0.5rem;
        }
        .nav-menu {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #e2e8f0;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            background: rgba(255,255,255,0.12);
            color: #facc15;
            text-decoration: none;
        }
        .nav-menu .active { color: #facc15; background: rgba(250,204,21,0.1); }
        .breadcrumb {
            background: #eef2f7;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            color: #475569;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 0.3rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.4rem;
            color: #94a3b8;
        }
        .breadcrumb a { color: #2b6cb0; }
        .breadcrumb a:hover { text-decoration: underline; }
        .breadcrumb .current { color: #1e293b; font-weight: 600; }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        .main-content { min-width: 0; }
        .sidebar {
            position: sticky;
            top: 90px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 2px 12px rgba(0,0,0,0.06);
            margin-bottom: 1.5rem;
            border: 1px solid #e2e8f0;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            margin-top: 0;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.5rem;
        }
        .sidebar-card ul { list-style: none; padding: 0; margin: 0; }
        .sidebar-card li { margin-bottom: 0.5rem; }
        .sidebar-card a {
            display: block;
            padding: 0.4rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .sidebar-card a:hover { background: #f1f5f9; text-decoration: none; }
        .article-box {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2.2rem;
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            border: 1px solid #eef2f7;
        }
        .article-box h2 { margin-top: 2.5rem; }
        .article-box h3 { margin-top: 2rem; }
        .article-box h4 { margin-top: 1.2rem; }
        .featured-image {
            border-radius: 14px;
            overflow: hidden;
            margin: 1.8rem 0;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        }
        .featured-image img { width: 100%; object-fit: cover; }
        .featured-image figcaption {
            background: #f1f5f9;
            padding: 0.6rem 1rem;
            font-size: 0.9rem;
            color: #475569;
            text-align: center;
            border-top: 1px solid #e2e8f0;
        }
        .update-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #eef2ff;
            color: #1e40af;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            margin: 1.5rem 0;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input:focus { border-color: #2b6cb0; }
        .search-form button {
            padding: 0.7rem 1.8rem;
            background: #0f172a;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover { background: #1e293b; }
        .feedback-section {
            background: #f8fafc;
            border-radius: 14px;
            padding: 1.8rem 2rem;
            margin: 2.5rem 0 1.5rem;
            border: 1px solid #e2e8f0;
        }
        .feedback-section h3 { margin-top: 0; border-bottom: none; }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
            margin: 0.6rem 0 1rem;
        }
        .rating-stars i.active { color: #facc15; }
        .rating-stars i:hover { color: #facc15; transform: scale(1.1); }
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            resize: vertical;
            min-height: 100px;
            outline: none;
            transition: border 0.2s;
        }
        .comment-form textarea:focus { border-color: #2b6cb0; }
        .comment-form .form-row {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-top: 0.8rem;
        }
        .comment-form input {
            flex: 1;
            min-width: 150px;
            padding: 0.7rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 1rem;
            outline: none;
        }
        .comment-form input:focus { border-color: #2b6cb0; }
        .comment-form button {
            padding: 0.7rem 2rem;
            background: #0f172a;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .comment-form button:hover { background: #1e293b; }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .site-footer h4 { color: #f1f5f9; margin-top: 0; font-size: 1.1rem; }
        .site-footer a { color: #94a3b8; }
        .site-footer a:hover { color: #facc15; text-decoration: underline; }
        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.9rem;
        }
        friend-link {
            display: block;
            background: #1a2332;
            padding: 1rem 1.5rem;
            border-radius: 10px;
            margin: 1rem 0;
        }
        friend-link a {
            display: inline-block;
            margin: 0.3rem 1rem 0.3rem 0;
        }
        @media (max-width: 1024px) {
            .main-grid { grid-template-columns: 1fr; }
            .sidebar { position: static; }
            .sidebar .sidebar-card { display: inline-block; width: 100%; }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 0.8rem;
                gap: 0.1rem;
            }
            .nav-menu.open { display: flex; }
            .nav-menu a { padding: 0.6rem 1rem; border-radius: 4px; }
            .article-box { padding: 1.2rem 1rem; }
            h1 { font-size: 1.7rem; }
            h2 { font-size: 1.35rem; }
            .header-inner { align-items: center; }
            .my-logo { font-size: 1.3rem; }
            .search-form input { min-width: 120px; }
            .feedback-section { padding: 1.2rem; }
            .rating-stars { font-size: 1.4rem; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 0.8rem; }
            .article-box { padding: 0.8rem 0.8rem; }
            .breadcrumb { font-size: 0.8rem; }
            .search-form button { padding: 0.6rem 1.2rem; font-size: 0.9rem; }
        }
        .emoji-big { font-size: 1.3em; margin-right: 0.2rem; }
        .badge { display: inline-block; background: #dbeafe; color: #1e40af; padding: 0.1rem 0.7rem; border-radius: 30px; font-size: 0.8rem; font-weight: 600; }
        .divider { border: none; height: 2px; background: linear-gradient(to right, #e2e8f0, transparent); margin: 2rem 0; }
        .table-wrap { overflow-x: auto; margin: 1.2rem 0; }
        table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
        th, td { padding: 0.6rem 1rem; text-align: left; border-bottom: 1px solid #e2e8f0; }
        th { background: #f1f5f9; font-weight: 700; }