*,
        *::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: #0f0f1a;
            color: #e8e8f0;
            line-height: 1.8;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #facc15;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus-visible {
            color: #ffdd44;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            margin-top: 1.6em;
            margin-bottom: 0.5em;
            color: #f8fafc;
        }
        h1 {
            font-size: 2.4rem;
            border-left: 6px solid #facc15;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 2px solid #2d2d4a;
            padding-bottom: 0.3em;
        }
        h3 {
            font-size: 1.35rem;
            color: #e2e8f0;
        }
        h4 {
            font-size: 1.1rem;
            color: #cbd5e1;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(250, 204, 21, 0.18) 0%, rgba(250, 204, 21, 0.05) 80%);
            padding: 0.1rem 0.4rem;
            border-radius: 6px;
        }
        .badge {
            display: inline-block;
            background: #facc15;
            color: #0f0f1a;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.2em;
        }
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
            border-bottom: 2px solid #2d2d4a;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, #facc15, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #facc15;
            font-size: 1.6rem;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            -webkit-text-fill-color: #94a3b8;
            letter-spacing: 0.5px;
            display: block;
            margin-top: -4px;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.3rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-list li a {
            padding: 0.5rem 0.9rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            color: #cbd5e1;
            transition: all 0.25s ease;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .nav-list li a:hover,
        .nav-list li a.active {
            background: rgba(250, 204, 21, 0.15);
            color: #facc15;
            text-decoration: none;
        }
        .nav-list li a i {
            font-size: 0.8rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #facc15;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(250, 204, 21, 0.1);
        }
        .hamburger:focus-visible {
            outline: 2px solid #facc15;
            outline-offset: 2px;
        }
        .breadcrumb {
            padding: 0.8rem 0 0.4rem 0;
            font-size: 0.85rem;
            color: #94a3b8;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #64748b;
        }
        .breadcrumb a {
            color: #94a3b8;
        }
        .breadcrumb a:hover {
            color: #facc15;
        }
        .breadcrumb .current {
            color: #facc15;
            font-weight: 600;
        }
        .hero {
            background: radial-gradient(ellipse at 20% 50%, #1e2a4a, #0f0f1a);
            padding: 2.5rem 0 1.8rem 0;
            border-bottom: 1px solid #2d2d4a;
        }
        .hero h1 {
            margin-top: 0;
            font-size: 2.6rem;
        }
        .hero .subhead {
            font-size: 1.15rem;
            color: #94a3b8;
            max-width: 720px;
            margin-top: 0.5rem;
        }
        .hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #64748b;
        }
        .hero .meta i {
            color: #facc15;
            margin-right: 0.3rem;
        }
        .search-wrap {
            background: #1a1a2e;
            border-radius: 60px;
            padding: 0.2rem;
            display: flex;
            max-width: 520px;
            margin: 1.5rem 0 0.5rem 0;
            border: 1px solid #2d2d4a;
            transition: border-color 0.3s;
        }
        .search-wrap:focus-within {
            border-color: #facc15;
        }
        .search-wrap input {
            flex: 1;
            background: transparent;
            border: none;
            padding: 0.8rem 1.2rem;
            font-size: 0.95rem;
            color: #f8fafc;
            outline: none;
            border-radius: 60px 0 0 60px;
        }
        .search-wrap input::placeholder {
            color: #64748b;
        }
        .search-wrap button {
            background: #facc15;
            border: none;
            padding: 0.8rem 1.6rem;
            border-radius: 60px;
            font-weight: 700;
            color: #0f0f1a;
            cursor: pointer;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.95rem;
        }
        .search-wrap button:hover {
            background: #fbbf24;
        }
        .search-wrap button i {
            font-size: 1rem;
        }
        .content-area {
            padding: 2rem 0 3rem 0;
            flex: 1;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #1a1a2e;
            border-radius: 16px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            border: 1px solid #2d2d4a;
        }
        .sidebar-card h3 {
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 1px solid #2d2d4a;
            padding-bottom: 0.5rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar-card ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #1e1e36;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar-card ul li a i {
            color: #facc15;
            font-size: 0.75rem;
        }
        .featured-image {
            margin: 1.8rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
            background: #1a1a2e;
            padding: 0.5rem;
        }
        .featured-image img {
            width: 100%;
            border-radius: 12px;
        }
        .featured-image figcaption {
            text-align: center;
            font-size: 0.85rem;
            color: #94a3b8;
            padding: 0.6rem 0 0.2rem 0;
        }
        .interaction-area {
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 2px solid #2d2d4a;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .form-card {
            background: #1a1a2e;
            border-radius: 16px;
            padding: 1.8rem;
            border: 1px solid #2d2d4a;
        }
        .form-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .form-card label {
            display: block;
            font-weight: 600;
            margin: 1rem 0 0.3rem 0;
            font-size: 0.9rem;
            color: #cbd5e1;
        }
        .form-card input,
        .form-card textarea,
        .form-card select {
            width: 100%;
            padding: 0.7rem 1rem;
            border-radius: 10px;
            border: 1px solid #2d2d4a;
            background: #0f0f1a;
            color: #f8fafc;
            font-size: 0.95rem;
            transition: border-color 0.3s;
            font-family: inherit;
        }
        .form-card input:focus,
        .form-card textarea:focus,
        .form-card select:focus {
            border-color: #facc15;
            outline: none;
        }
        .form-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-card .submit-btn {
            background: #facc15;
            color: #0f0f1a;
            font-weight: 700;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 60px;
            cursor: pointer;
            margin-top: 1rem;
            transition: background 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1rem;
        }
        .form-card .submit-btn:hover {
            background: #fbbf24;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.3rem;
            justify-content: flex-end;
            margin: 0.5rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            font-size: 1.8rem;
            color: #475569;
            transition: color 0.2s;
            margin: 0;
        }
        .star-rating label i {
            pointer-events: none;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #facc15;
        }
        .site-footer {
            background: #0a0a18;
            border-top: 2px solid #2d2d4a;
            padding: 2.5rem 0 1.5rem 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .site-footer .copyright {
            text-align: center;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            border-top: 1px solid #1e1e36;
            font-size: 0.85rem;
            color: #64748b;
        }
        .site-footer .copyright strong {
            color: #94a3b8;
        }
        friend-link {
            display: block;
            background: #1a1a2e;
            padding: 1.2rem 1.5rem;
            border-radius: 12px;
            border: 1px solid #2d2d4a;
            margin: 1rem 0;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1rem 0.2rem 0;
            padding: 0.2rem 0;
        }
        friend-link a i {
            margin-right: 0.3rem;
            color: #facc15;
            font-size: 0.7rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            html {
                font-size: 15px;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1a1a2e;
                padding: 1rem 0.5rem;
                border-radius: 16px;
                margin-top: 0.8rem;
                border: 1px solid #2d2d4a;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 0.6rem 1rem;
                border-radius: 10px;
            }
            .hamburger {
                display: block;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .search-wrap {
                flex-wrap: wrap;
                border-radius: 20px;
            }
            .search-wrap input {
                border-radius: 20px 20px 0 0;
            }
            .search-wrap button {
                width: 100%;
                border-radius: 0 0 20px 20px;
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.9rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .form-card {
                padding: 1.2rem;
            }
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #1a1a2e;
            border-radius: 12px;
            overflow: hidden;
        }
        table th,
        table td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #2d2d4a;
        }
        table th {
            background: #0f3460;
            color: #facc15;
            font-weight: 700;
        }
        table tr:hover td {
            background: rgba(250, 204, 21, 0.04);
        }
        .blockquote {
            border-left: 4px solid #facc15;
            padding: 0.8rem 1.5rem;
            margin: 1.5rem 0;
            background: #1a1a2e;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #cbd5e1;
        }
        .blockquote cite {
            display: block;
            margin-top: 0.5rem;
            font-size: 0.85rem;
            color: #94a3b8;
            font-style: normal;
        }
        .toc {
            background: #1a1a2e;
            border-radius: 16px;
            padding: 1.5rem 2rem;
            border: 1px solid #2d2d4a;
            margin: 1.5rem 0;
        }
        .toc ol {
            counter-reset: toc-counter;
            list-style: none;
            padding-left: 0;
        }
        .toc ol li {
            counter-increment: toc-counter;
            padding: 0.3rem 0;
        }
        .toc ol li::before {
            content: counter(toc-counter) ". ";
            color: #facc15;
            font-weight: 700;
        }
        .toc ol li a {
            color: #e2e8f0;
        }
        .toc ol li a:hover {
            color: #facc15;
        }
        .tag {
            display: inline-block;
            background: #1e1e36;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            color: #94a3b8;
            margin: 0.1rem 0.2rem;
        }
        .tag i {
            color: #facc15;
            margin-right: 0.2rem;
        }