*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #1d4ed8;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            margin-top: 0;
            color: #0f172a;
        }
        h1 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.65rem;
            font-weight: 700;
            margin-top: 2.5rem;
            margin-bottom: 0.6rem;
            border-bottom: 3px solid #e2e8f0;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-top: 1.75rem;
            margin-bottom: 0.4rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-top: 1.25rem;
            margin-bottom: 0.3rem;
            color: #334155;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            padding: 0.75rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            background: linear-gradient(135deg, #facc15, #f97316);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.03em;
            display: inline-block;
            text-decoration: none !important;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none !important;
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #94a3b8;
            color: #94a3b8;
            display: block;
            font-weight: 400;
            letter-spacing: 0;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #facc15;
            color: #facc15;
            font-size: 1.5rem;
            padding: 0.3rem 0.7rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(250, 204, 21, 0.15);
        }
        .main-nav {
            display: flex;
            gap: 0.25rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #e2e8f0;
            padding: 0.45rem 0.9rem;
            border-radius: 6px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            text-decoration: none;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background: rgba(255, 255, 255, 0.1);
            color: #facc15;
            text-decoration: none;
        }
        .main-nav a.active {
            background: rgba(250, 204, 21, 0.18);
            color: #facc15;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 0.55rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.5rem;
            color: #64748b;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 500;
        }
        .search-section {
            background: #fff;
            padding: 1.25rem 0;
            border-bottom: 1px solid #e2e8f0;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input[type="text"] {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid #cbd5e1;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input[type="text"]:focus {
            border-color: #f97316;
        }
        .search-form button {
            background: linear-gradient(135deg, #f97316, #facc15);
            border: none;
            color: #0f172a;
            padding: 0.7rem 1.6rem;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: transform 0.15s, box-shadow 0.2s;
        }
        .search-form button:hover {
            transform: scale(1.02);
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
        }
        .hero {
            background: linear-gradient(145deg, #0f172a 0%, #1e293b 80%);
            color: #fff;
            padding: 2.5rem 0 2rem;
            text-align: center;
        }
        .hero h1 {
            color: #fff;
            font-size: 2.6rem;
            max-width: 800px;
            margin: 0 auto 0.5rem;
        }
        .hero p {
            color: #cbd5e1;
            font-size: 1.15rem;
            max-width: 700px;
            margin: 0 auto 1.2rem;
        }
        .hero .last-updated {
            font-size: 0.85rem;
            color: #94a3b8;
            display: block;
            margin-top: 0.8rem;
        }
        .content-wrap {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0 3rem;
        }
        .main-article {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 5rem;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            margin-bottom: 1.5rem;
            border: 1px solid #eef2f6;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 2px solid #facc15;
            padding-bottom: 0.4rem;
            margin-bottom: 0.8rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card li {
            padding: 0.35rem 0;
            border-bottom: 1px dashed #e2e8f0;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            font-weight: 500;
        }
        .featured-image {
            margin: 1.8rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            background: #e2e8f0;
        }
        .featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16/9;
            background: #cbd5e1;
        }
        .featured-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #475569;
            background: #f1f5f9;
            font-style: italic;
        }
        .interaction-area {
            background: #fff;
            border-radius: 16px;
            padding: 2rem;
            margin: 2.5rem 0;
            border: 1px solid #eef2f6;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            resize: vertical;
            min-height: 100px;
            font-family: inherit;
            font-size: 0.95rem;
            transition: border 0.2s;
        }
        .comment-form textarea:focus {
            border-color: #f97316;
            outline: none;
        }
        .comment-form input[type="text"] {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 0.95rem;
            transition: border 0.2s;
            margin-bottom: 0.7rem;
        }
        .comment-form input:focus {
            border-color: #f97316;
            outline: none;
        }
        .comment-form button,
        .rating-form button {
            background: #0f172a;
            color: #fff;
            border: none;
            padding: 0.65rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.15s;
        }
        .comment-form button:hover,
        .rating-form button:hover {
            background: #1e293b;
            transform: scale(1.02);
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #facc15;
            margin: 0.5rem 0 1rem;
            cursor: pointer;
        }
        .rating-stars i {
            transition: transform 0.15s, color 0.15s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
            color: #f97316;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .data-table th {
            background: #0f172a;
            color: #fff;
            padding: 0.7rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 0.65rem 1rem;
            border-bottom: 1px solid #eef2f6;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: #f8fafc;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 2.5rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .site-footer h4 {
            color: #facc15;
            margin-bottom: 0.8rem;
            font-size: 1.05rem;
        }
        .site-footer a {
            color: #94a3b8;
        }
        .site-footer a:hover {
            color: #facc15;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
            padding: 1rem 0 0.5rem;
            border-top: 1px solid #1e293b;
            margin-top: 1.5rem;
        }
        .friend-links a {
            font-size: 0.9rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.2rem;
            font-size: 0.85rem;
            color: #64748b;
            border-top: 1px solid #1e293b;
            margin-top: 1.2rem;
        }
        @media (max-width: 840px) {
            .content-wrap {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 640px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 0.75rem;
                background: #1e293b;
                border-radius: 12px;
                padding: 0.5rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.6rem 1rem;
                border-radius: 8px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
            .data-table {
                font-size: 0.82rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.5rem 0.6rem;
            }
        }
        @media (max-width: 400px) {
            .container {
                padding: 0 0.9rem;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
        }
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
        }
        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        :focus-visible {
            outline: 3px solid #f97316;
            outline-offset: 2px;
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 0;
            background: #f97316;
            color: #fff;
            padding: 0.5rem 1rem;
            z-index: 1000;
        }
        .skip-link:focus {
            top: 0;
        }