*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --bg-body: #0d0f13;
            --bg-card: #161a21;
            --bg-card-hover: #1e2530;
            --text-primary: #eef2f7;
            --text-secondary: #9aa9c0;
            --accent-gold: #f0b429;
            --accent-gold-dark: #d49a1a;
            --accent-orange: #e67e22;
            --accent-teal: #1abc9c;
            --border-color: #2a3342;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
            --radius: 12px;
            --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --max-width: 1200px;
            --header-height: 70px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-body);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            padding: 0;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: var(--accent-orange);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--bg-card);
            border-bottom: 2px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            font-family: var(--font-heading);
            color: var(--accent-gold);
            letter-spacing: 1px;
            text-transform: uppercase;
            background: linear-gradient(135deg, #f0b429, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
        }
        .my-logo span {
            font-weight: 300;
            color: var(--text-secondary);
            -webkit-text-fill-color: var(--text-secondary);
        }
        .nav-desktop {
            display: flex;
            gap: 28px;
            align-items: center;
        }
        .nav-desktop a {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 4px 0;
            transition: color 0.2s;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-gold);
            transition: width 0.25s ease;
        }
        .nav-desktop a:hover::after,
        .nav-desktop a:focus::after {
            width: 100%;
        }
        .nav-desktop a:hover,
        .nav-desktop a:focus {
            color: var(--accent-gold);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: var(--border-color);
        }
        .nav-mobile {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: var(--bg-card);
            border-bottom: 2px solid var(--border-color);
            padding: 20px 24px;
            flex-direction: column;
            gap: 16px;
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .nav-mobile.open {
            display: flex;
        }
        .nav-mobile a {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 1.05rem;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .nav-mobile a:hover {
            color: var(--accent-gold);
            text-decoration: none;
        }
        .breadcrumb {
            background: var(--bg-card);
            padding: 12px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb li+li::before {
            content: '▸';
            color: var(--accent-gold);
            margin-right: 6px;
        }
        .breadcrumb a {
            color: var(--accent-gold);
        }
        .breadcrumb a:hover {
            color: var(--accent-orange);
        }
        .breadcrumb .current {
            color: var(--text-secondary);
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .article-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .article-header h1 {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #f0b429, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .article-header .subhead {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto 16px;
        }
        .article-header .meta {
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .article-header .meta i {
            margin-right: 6px;
            color: var(--accent-gold);
        }
        .last-updated {
            display: inline-block;
            background: var(--border-color);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-secondary);
        }
        section {
            margin-bottom: 48px;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin: 48px 0 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-color);
            position: relative;
        }
        h2::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 60px;
            height: 2px;
            background: var(--accent-gold);
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--accent-orange);
            margin: 32px 0 12px;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--accent-teal);
            margin: 24px 0 8px;
        }
        p {
            margin-bottom: 16px;
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.8;
        }
        .content-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 32px;
            margin-bottom: 24px;
            border: 1px solid var(--border-color);
            transition: background 0.25s, transform 0.2s;
        }
        .content-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-2px);
        }
        .highlight-box {
            background: linear-gradient(135deg, rgba(240, 180, 41, 0.08), rgba(230, 126, 34, 0.04));
            border-left: 4px solid var(--accent-gold);
            border-radius: 0 var(--radius) var(--radius) 0;
            padding: 20px 24px;
            margin: 20px 0;
        }
        .highlight-box p {
            margin-bottom: 0;
        }
        .inline-img {
            margin: 24px 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .img-caption {
            font-size: 0.85rem;
            color: var(--text-secondary);
            text-align: center;
            margin-top: 8px;
            font-style: italic;
        }
        .link-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            margin: 16px 0;
            padding: 0;
            list-style: none;
        }
        .link-group li a {
            background: var(--border-color);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: all 0.2s;
        }
        .link-group li a:hover {
            background: var(--accent-gold);
            color: #0d0f13;
            text-decoration: none;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
            margin: 40px 0;
        }
        .interaction-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px;
            transition: background 0.25s;
        }
        .interaction-card:hover {
            background: var(--bg-card-hover);
        }
        .interaction-card h3 {
            font-size: 1.2rem;
            margin-top: 0;
            margin-bottom: 16px;
            color: var(--accent-gold);
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 12px 16px;
            color: var(--text-primary);
            font-size: 0.95rem;
            font-family: var(--font-body);
            transition: border 0.2s;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            outline: none;
            border-color: var(--accent-gold);
        }
        .interaction-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .btn {
            background: var(--accent-gold);
            color: #0d0f13;
            font-weight: 600;
            border: none;
            border-radius: 8px;
            padding: 12px 24px;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 0.95rem;
        }
        .btn:hover {
            background: var(--accent-gold-dark);
            transform: scale(1.02);
        }
        .btn:active {
            transform: scale(0.98);
        }
        friend-link {
            display: block;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px 28px;
            margin: 32px 0 16px;
        }
        friend-link h3 {
            color: var(--accent-gold);
            margin-top: 0;
            font-size: 1.3rem;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            padding: 0;
            margin: 12px 0 0;
        }
        friend-link ul li a {
            color: var(--text-secondary);
            font-size: 0.95rem;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: all 0.2s;
        }
        friend-link ul li a:hover {
            color: var(--accent-gold);
            border-bottom-color: var(--accent-gold);
            text-decoration: none;
        }
        .site-footer {
            background: var(--bg-card);
            border-top: 2px solid var(--border-color);
            padding: 40px 20px 24px;
            text-align: center;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .site-footer .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .site-footer p {
            margin-bottom: 8px;
            color: var(--text-secondary);
        }
        .site-footer .copyright {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            margin-top: 20px;
            font-size: 0.85rem;
        }
        .schema-hidden {
            display: none;
        }
        @media (max-width: 900px) {
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .content-card {
                padding: 20px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .breadcrumb ol {
                padding: 0 4px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.6rem;
            }
            .content-card {
                padding: 16px;
            }
            .interaction-card {
                padding: 16px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .container {
                padding: 0 12px;
            }
            .breadcrumb {
                padding: 10px 12px;
            }
        }
        @media (min-width: 901px) {
            .nav-mobile {
                display: none !important;
            }
        }
        .emoji-big {
            font-size: 1.4em;
            margin-right: 6px;
        }
        .text-accent {
            color: var(--accent-gold);
        }
        .text-teal {
            color: var(--accent-teal);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-0 {
            margin-top: 0;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .gap-8 {
            gap: 8px;
        }
        strong,
        b {
            color: var(--text-primary);
        }
        hr {
            border: none;
            border-top: 1px solid var(--border-color);
            margin: 32px 0;
        }
        .fade-in {
            animation: fadeUp 0.6s ease forwards;
        }
        @keyframes fadeUp {
            0% {
                opacity: 0;
                transform: translateY(20px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }