*,
        *::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, sans-serif;
            background: #f8f9fc;
            color: #1e293b;
            line-height: 1.75;
            padding: 0 1rem;
        }
        a {
            color: #0c4a6e;
            text-decoration: none;
            transition: color .2s;
        }
        a:hover {
            color: #0284c7;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -.01em;
            color: #0f172a;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 1.2rem;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.4rem 0 1rem;
            border-left: 6px solid #f59e0b;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.35rem;
            margin: 1.8rem 0 0.6rem;
            color: #1e293b;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.2rem 0 0.4rem;
            color: #334155;
        }
        p {
            margin-bottom: 1.2rem;
            color: #334155;
        }
        ul,
        ol {
            margin: 0 0 1.2rem 1.8rem;
            color: #334155;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 40px rgba(0, 0, 0, .05);
            border-radius: 20px;
            padding: 1.2rem 1.8rem 2rem;
        }
        @media (max-width:640px) {
            .container {
                padding: .8rem .8rem 1.6rem;
                border-radius: 12px;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
                margin-top: 1.8rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            body {
                padding: 0 .4rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.6rem 0 1rem;
            border-bottom: 2px solid #e2e8f0;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0f172a, #1e40af);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: #f59e0b;
            font-size: 2rem;
        }
        .my-logo:hover {
            opacity: .85;
            text-decoration: none;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.2rem;
            margin: 0;
            flex-wrap: wrap;
        }
        .nav-list li a {
            display: block;
            padding: 0.4rem 0.9rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #1e293b;
            transition: background .2s, color .2s;
        }
        .nav-list li a:hover {
            background: #eef2ff;
            color: #1e40af;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #0f172a;
            padding: 0.2rem 0.4rem;
        }
        @media (max-width:768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                border-radius: 16px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, .12);
                padding: 1rem 0.6rem;
                margin-top: 0.8rem;
                position: absolute;
                top: 100%;
                left: 0;
                z-index: 99;
                border: 1px solid #e2e8f0;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 0.7rem 1.2rem;
                border-radius: 12px;
            }
            .site-header {
                position: relative;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.6rem 0 0.2rem;
            margin: 0 0 0.8rem;
            font-size: 0.85rem;
            color: #64748b;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.4rem;
            color: #94a3b8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #0c4a6e;
        }
        .breadcrumb a:hover {
            color: #0284c7;
        }
        .search-section {
            background: #f1f5f9;
            border-radius: 16px;
            padding: 1.2rem 1.6rem;
            margin: 1.2rem 0 2rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.8rem;
        }
        .search-section label {
            font-weight: 600;
            color: #0f172a;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-section input {
            flex: 1;
            min-width: 160px;
            padding: 0.7rem 1rem;
            border: 2px solid #cbd5e1;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border .2s;
            background: #fff;
        }
        .search-section input:focus {
            border-color: #f59e0b;
        }
        .search-section button {
            background: #0f172a;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background .2s, transform .1s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-section button:hover {
            background: #1e293b;
            transform: scale(1.02);
        }
        .featured-figure {
            margin: 1.8rem 0 2.4rem;
            border-radius: 16px;
            overflow: hidden;
            background: #f1f5f9;
            text-align: center;
        }
        .featured-figure img {
            width: 100%;
            max-height: 520px;
            object-fit: cover;
        }
        .featured-figure figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.9rem;
            color: #475569;
            font-style: italic;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
            margin: 2.4rem 0;
        }
        @media (max-width:700px) {
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.4rem 1.6rem;
            border: 1px solid #e2e8f0;
        }
        .card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .star-rating {
            display: flex;
            gap: 4px;
            font-size: 1.7rem;
            cursor: pointer;
            color: #cbd5e1;
            transition: color .15s;
            margin: 0.4rem 0 0.8rem;
        }
        .star-rating .star.active {
            color: #f59e0b;
        }
        .star-rating .star:hover,
        .star-rating .star.hover {
            color: #fbbf24;
        }
        .card textarea {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #cbd5e1;
            border-radius: 12px;
            font-size: 0.95rem;
            resize: vertical;
            min-height: 80px;
            font-family: inherit;
            transition: border .2s;
        }
        .card textarea:focus {
            border-color: #f59e0b;
            outline: none;
        }
        .card .btn-submit {
            background: #0f172a;
            color: #fff;
            border: none;
            padding: 0.6rem 1.6rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background .2s;
            margin-top: 0.6rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card .btn-submit:hover {
            background: #1e293b;
        }
        .feedback-msg {
            font-size: 0.9rem;
            margin-top: 0.6rem;
            color: #16a34a;
            font-weight: 500;
        }
        .site-footer {
            margin-top: 2.8rem;
            padding-top: 1.6rem;
            border-top: 2px solid #e2e8f0;
            font-size: 0.9rem;
            color: #475569;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.2rem;
        }
        friend-link {
            display: block;
            margin: 0.8rem 0;
            font-weight: 500;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            padding: 0.2rem 0;
        }
        .copyright {
            text-align: center;
            padding: 1rem 0 0.2rem;
            font-size: 0.85rem;
            color: #64748b;
            border-top: 1px solid #e2e8f0;
            margin-top: 1rem;
        }
        .last-updated {
            display: inline-block;
            background: #f1f5f9;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            color: #475569;
            margin-bottom: 0.8rem;
        }
        .text-muted {
            color: #64748b;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .highlight {
            background: linear-gradient(to right, #fef9c3, #fde68a);
            padding: 0.1rem 0.3rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .badge {
            display: inline-block;
            background: #dbeafe;
            color: #1e40af;
            padding: 0.1rem 0.8rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-left: 0.4rem;
        }
        .toc {
            background: #f1f5f9;
            border-radius: 16px;
            padding: 1.2rem 1.8rem;
            margin: 1.6rem 0 2rem;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ul {
            columns: 2 220px;
            list-style: none;
            margin: 0.6rem 0 0;
        }
        .toc li {
            margin-bottom: 0.3rem;
        }
        .toc li a {
            font-weight: 500;
        }
        @media (max-width:500px) {
            .toc ul {
                columns: 1;
            }
        }
        .link-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.8rem;
            list-style: none;
            margin: 0.6rem 0 1.2rem;
        }
        .link-list-inline li a {
            background: #f1f5f9;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: background .2s;
        }
        .link-list-inline li a:hover {
            background: #e2e8f0;
            text-decoration: none;
        }
        .schema-hidden {
            display: none;
        }