*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.75;
            padding: 0;
            margin: 0;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #1d4ed8;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            color: #0f172a;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4em;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 3px solid #2563eb;
            padding-bottom: 0.2em;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2em;
        }
        ul,
        ol {
            margin: 0.8em 0 1.4em 2em;
        }
        li {
            margin-bottom: 0.3em;
        }
        blockquote {
            border-left: 5px solid #2563eb;
            background: #eef2ff;
            padding: 1em 1.5em;
            margin: 1.5em 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
        }
        hr {
            border: 0;
            border-top: 2px dashed #cbd5e1;
            margin: 2.5em 0;
        }
        strong {
            color: #0f172a;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
            color: #fff;
            padding: 18px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: linear-gradient(135deg, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: transform 0.2s ease;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.6rem;
            font-weight: 400;
            color: #94a3b8;
            -webkit-text-fill-color: #94a3b8;
            display: block;
            letter-spacing: 1px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        nav {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        nav a {
            color: #e2e8f0;
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: all 0.2s ease;
            border: 1px solid transparent;
        }
        nav a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.2);
            text-decoration: none;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 12px 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            margin: 0;
            padding: 0;
        }
        .breadcrumb li+li::before {
            content: "▸";
            margin-right: 10px;
            color: #64748b;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 500;
        }
        .hero {
            background: linear-gradient(145deg, #dbeafe 0%, #ede9fe 100%);
            padding: 40px 0 50px;
            text-align: center;
            border-bottom: 4px solid #2563eb;
        }
        .hero h1 {
            font-size: 2.8rem;
            margin: 0 0 10px;
            background: linear-gradient(135deg, #1e3a5f, #2563eb);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: #334155;
            max-width: 700px;
            margin: 0 auto;
        }
        .hero .meta {
            margin-top: 18px;
            font-size: 0.9rem;
            color: #64748b;
        }
        .hero .meta i {
            margin-right: 4px;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-body {
            background: #fff;
            padding: 30px 35px;
            border-radius: 20px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            margin-bottom: 24px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 10px;
        }
        .sidebar-card ul {
            list-style: none;
            margin: 12px 0 0;
            padding: 0;
        }
        .sidebar-card li {
            padding: 6px 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar-card li a {
            font-weight: 500;
        }
        .featured-image {
            margin: 1.8em 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .featured-image figcaption {
            padding: 12px 16px;
            background: #f1f5f9;
            font-size: 0.85rem;
            color: #475569;
            text-align: center;
        }
        .interactive-box {
            background: #f1f5f9;
            border-radius: 16px;
            padding: 24px 28px;
            margin: 2em 0;
            border: 1px solid #e2e8f0;
        }
        .interactive-box h3 {
            margin-top: 0;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 12px 18px;
            border: 2px solid #cbd5e1;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input:focus {
            border-color: #2563eb;
        }
        .search-form button {
            padding: 12px 28px;
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 1rem;
        }
        .search-form button:hover {
            background: #1d4ed8;
        }
        .comment-form textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid #cbd5e1;
            border-radius: 12px;
            font-size: 1rem;
            resize: vertical;
            min-height: 100px;
            font-family: inherit;
            transition: border 0.2s;
        }
        .comment-form textarea:focus {
            border-color: #2563eb;
            outline: none;
        }
        .comment-form .field-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin: 12px 0;
        }
        .comment-form .field-row input {
            flex: 1;
            min-width: 140px;
            padding: 12px 16px;
            border: 2px solid #cbd5e1;
            border-radius: 30px;
            font-size: 0.95rem;
            transition: border 0.2s;
        }
        .comment-form .field-row input:focus {
            border-color: #2563eb;
            outline: none;
        }
        .comment-form button {
            padding: 12px 32px;
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 1rem;
        }
        .comment-form button:hover {
            background: #1d4ed8;
        }
        .rating-stars {
            display: flex;
            gap: 8px;
            font-size: 2rem;
            cursor: pointer;
            color: #cbd5e1;
            transition: color 0.2s;
            margin: 8px 0;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f59e0b;
        }
        .rating-stars i {
            transition: color 0.15s;
        }
        .score-form button {
            padding: 10px 28px;
            background: #059669;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 1rem;
        }
        .score-form button:hover {
            background: #047857;
        }
        .link-inset {
            background: #eef2ff;
            border-radius: 12px;
            padding: 18px 22px;
            margin: 1.6em 0;
            border-left: 4px solid #2563eb;
        }
        .link-inset ul {
            margin: 8px 0 0;
            padding: 0;
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
        }
        .link-inset li a {
            font-weight: 600;
            font-size: 0.92rem;
        }
        footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 40px 0 20px;
            border-top: 4px solid #2563eb;
        }
        footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 30px;
        }
        footer h4 {
            color: #f1f5f9;
            margin-top: 0;
            font-size: 1.1rem;
        }
        footer a {
            color: #93c5fd;
        }
        footer a:hover {
            color: #fff;
        }
        friend-link {
            display: block;
            margin-top: 12px;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
            padding: 4px 0;
        }
        .copyright {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid #1e293b;
            margin-top: 20px;
            font-size: 0.85rem;
            color: #64748b;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            footer .container {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2rem;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 16px;
                gap: 4px;
            }
            nav.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            header .container {
                position: relative;
            }
            .article-body {
                padding: 20px 18px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .search-form input,
            .search-form button {
                width: 100%;
            }
            .comment-form .field-row input {
                min-width: 100%;
            }
            .rating-stars {
                font-size: 1.6rem;
            }
        }
        .text-sm {
            font-size: 0.85rem;
            color: #64748b;
        }
        .mt-1 {
            margin-top: 1em;
        }
        .mb-1 {
            margin-bottom: 1em;
        }
        .flex {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        .gap-1 {
            gap: 1rem;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5em 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #f8fafc;
            border-radius: 12px;
            overflow: hidden;
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #1e293b;
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: 0;
        }
        .tag {
            display: inline-block;
            background: #dbeafe;
            color: #1e40af;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .schema-hidden {
            display: none;
        }