*,
        *::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', Arial, sans-serif;
            background: #f5f7fc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #0f3b5e;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus-visible {
            color: #b8860b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            color: #0f1a2e;
        }
        h1 {
            font-size: 2.2rem;
            margin-bottom: 1.2rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2.4rem;
            margin-bottom: 0.8rem;
            border-left: 6px solid #b8860b;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.35rem;
            margin-top: 1.8rem;
            margin-bottom: 0.5rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.1rem;
            margin-top: 1.4rem;
            margin-bottom: 0.3rem;
            color: #2c4a6e;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.02rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 0;
            background: #b8860b;
            color: #fff;
            padding: 0.6rem 1.4rem;
            z-index: 1000;
            font-weight: 600;
            border-radius: 0 0 6px 0;
        }
        .skip-link:focus {
            top: 0;
        }
        .site-header {
            background: linear-gradient(145deg, #0f1a2e 0%, #1a2a44 100%);
            color: #f0f4fa;
            padding: 0.6rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #f5d742;
            text-shadow: 0 2px 8px rgba(245, 215, 66, 0.25);
            transition: opacity 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            font-size: 1.8rem;
            color: #f5d742;
        }
        .my-logo:hover {
            opacity: 0.88;
            text-decoration: none;
        }
        .my-logo span {
            font-weight: 300;
            color: #c0d0e0;
            font-size: 0.75rem;
            display: block;
            line-height: 1.1;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .main-nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e0e8f4;
            padding: 0.5rem 0.9rem;
            border-radius: 30px;
            font-size: 0.88rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s, transform 0.15s;
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a:focus-visible {
            background: rgba(245, 215, 66, 0.18);
            color: #f5d742;
            transform: translateY(-1px);
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 0.3rem;
            font-size: 0.8rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.25);
            color: #f0f4fa;
            font-size: 1.6rem;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            cursor: pointer;
            transition: border-color 0.2s, background 0.2s;
            line-height: 1;
        }
        .hamburger:hover,
        .hamburger:focus-visible {
            border-color: #f5d742;
            background: rgba(245, 215, 66, 0.08);
        }
        .hamburger:focus-visible {
            outline: 2px solid #f5d742;
            outline-offset: 2px;
        }
        .nav-panel {
            display: flex;
            flex-direction: row;
            align-items: center;
            gap: 0.4rem;
        }
        .breadcrumb-wrap {
            background: #eef2f7;
            padding: 0.5rem 0;
            border-bottom: 1px solid #dce3ed;
            font-size: 0.85rem;
        }
        .breadcrumb-wrap nav ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-wrap nav ol li+li::before {
            content: "›";
            margin-right: 0.5rem;
            color: #6b7a8f;
            font-weight: 600;
        }
        .breadcrumb-wrap nav ol li a {
            color: #1a3a5a;
        }
        .breadcrumb-wrap nav ol li[aria-current="page"] {
            color: #6b7a8f;
            font-weight: 500;
        }
        .main-content {
            flex: 1;
            padding: 2rem 0 3rem;
        }
        .article-body {
            background: #ffffff;
            border-radius: 20px;
            padding: 2.2rem 2.5rem;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.04);
            margin-bottom: 2.5rem;
        }
        .last-updated {
            display: inline-block;
            background: #f0f4fa;
            padding: 0.3rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #3a5a7a;
            margin-bottom: 1.2rem;
            border: 1px solid #dce3ed;
        }
        .last-updated i {
            margin-right: 0.4rem;
            color: #b8860b;
        }
        .featured-image-wrap {
            margin: 1.8rem 0 2.2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
            background: #eef2f7;
        }
        .featured-image-wrap img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .featured-image-wrap:hover img {
            transform: scale(1.01);
        }
        .featured-image-wrap figcaption {
            padding: 0.6rem 1.2rem;
            font-size: 0.85rem;
            color: #4a5a6e;
            background: #f8faff;
            border-top: 1px solid #e0e8f0;
        }
        .search-section {
            background: #f0f5fe;
            border-radius: 16px;
            padding: 1.6rem 2rem;
            margin: 2rem 0 1.5rem;
            border: 1px solid #dce6f2;
        }
        .search-section form {
            display: flex;
            gap: 0.8rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .search-section label {
            font-weight: 600;
            color: #0f1a2e;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-section input[type="text"] {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #c8d6e5;
            border-radius: 40px;
            font-size: 0.95rem;
            background: #fff;
            transition: border-color 0.25s, box-shadow 0.25s;
        }
        .search-section input[type="text"]:focus {
            border-color: #b8860b;
            box-shadow: 0 0 0 4px rgba(184, 134, 11, 0.12);
            outline: none;
        }
        .search-section button {
            background: #0f1a2e;
            color: #f5d742;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-section button:hover,
        .search-section button:focus-visible {
            background: #1a2a44;
            transform: translateY(-2px);
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 2.2rem 0 1.2rem;
        }
        .interaction-card {
            background: #f8faff;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
            border: 1px solid #e0e8f2;
            transition: box-shadow 0.25s;
        }
        .interaction-card:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
        }
        .interaction-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-left: 4px solid #b8860b;
            padding-left: 0.8rem;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .interaction-card label {
            font-weight: 500;
            font-size: 0.9rem;
            color: #1e3a5f;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 0.6rem 1rem;
            border: 2px solid #d0dce8;
            border-radius: 10px;
            font-size: 0.95rem;
            background: #fff;
            transition: border-color 0.2s;
            font-family: inherit;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            border-color: #b8860b;
            outline: none;
            box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.08);
        }
        .interaction-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interaction-card .btn-submit {
            background: #b8860b;
            color: #fff;
            border: none;
            padding: 0.7rem 1.6rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            align-self: flex-start;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .interaction-card .btn-submit:hover,
        .interaction-card .btn-submit:focus-visible {
            background: #9e7409;
            transform: translateY(-2px);
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #d0d8e0;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars i {
            transition: color 0.15s, transform 0.15s;
        }
        .rating-stars i:hover,
        .rating-stars i:hover~i {
            color: #f5b342;
            transform: scale(1.08);
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 1.6rem;
            color: #d0d8e0;
            cursor: pointer;
            transition: color 0.15s, transform 0.15s;
        }
        .rating-stars input:checked~label {
            color: #f5b342;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label {
            color: #f5b342;
            transform: scale(1.08);
        }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 0.6rem 1rem;
            margin: 1.2rem 0;
            padding: 1rem 1.4rem;
            background: #f4f8fe;
            border-radius: 14px;
            border: 1px solid #e0eaf2;
        }
        .link-grid a {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.92rem;
            padding: 0.2rem 0;
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s;
        }
        .link-grid a i {
            font-size: 0.75rem;
            color: #b8860b;
        }
        .link-grid a:hover {
            border-bottom-color: #b8860b;
        }
        .site-footer {
            background: #0f1a2e;
            color: #c8d6e5;
            padding: 2rem 0 1.8rem;
            margin-top: 2rem;
            border-top: 4px solid #b8860b;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem 2rem;
        }
        .footer-inner .copyright {
            font-size: 0.88rem;
            opacity: 0.85;
        }
        .footer-inner .copyright i {
            margin-right: 0.3rem;
            color: #f5d742;
        }
        friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.4rem;
            align-items: center;
            font-size: 0.9rem;
        }
        friend-link a {
            color: #b0c8e0;
            border-bottom: 1px solid transparent;
            transition: color 0.2s, border-color 0.2s;
        }
        friend-link a:hover {
            color: #f5d742;
            border-bottom-color: #f5d742;
            text-decoration: none;
        }
        friend-link::before {
            content: "🔗 Friends:";
            font-weight: 600;
            color: #f5d742;
            margin-right: 0.4rem;
        }
        @media (max-width: 820px) {
            .article-body {
                padding: 1.6rem 1.2rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .search-section form {
                flex-direction: column;
                align-items: stretch;
            }
            .search-section input[type="text"] {
                min-width: unset;
            }
            .link-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-inner {
                flex-direction: column;
                gap: 1rem;
            }
        }
        @media (max-width: 640px) {
            .hamburger {
                display: block;
            }
            .nav-panel {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1a2a44;
                padding: 0.8rem 0.6rem;
                border-radius: 12px;
                margin-top: 0.4rem;
                gap: 0.2rem;
            }
            .nav-panel.open {
                display: flex;
            }
            .main-nav {
                flex-direction: column;
                width: 100%;
            }
            .main-nav a {
                padding: 0.5rem 1rem;
                border-radius: 8px;
                width: 100%;
            }
            .link-grid {
                grid-template-columns: 1fr;
            }
            .article-body {
                padding: 1.2rem 0.8rem;
                border-radius: 12px;
            }
            h1 {
                font-size: 1.5rem;
            }
            h2 {
                font-size: 1.3rem;
                padding-left: 0.6rem;
                border-left-width: 4px;
            }
            .featured-image-wrap {
                margin: 1rem 0 1.4rem;
            }
            .interaction-card {
                padding: 1.2rem;
            }
            .rating-stars label {
                font-size: 1.4rem;
            }
        }
        @media (min-width: 641px) {
            .nav-panel {
                display: flex !important;
                flex-direction: row;
            }
            .hamburger {
                display: none !important;
            }
        }
        @media print {
            .site-header,
            .site-footer,
            .search-section,
            .interaction-grid,
            .hamburger,
            .nav-wrapper {
                display: none !important;
            }
            .article-body {
                box-shadow: none;
                border: 1px solid #ddd;
                padding: 1rem;
            }
            .breadcrumb-wrap {
                border: none;
                background: none;
            }
            body {
                background: #fff;
                color: #000;
            }
        }
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #eef2f7;
        }
        ::-webkit-scrollbar-thumb {
            background: #b0c0d0;
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #8a9ab0;
        }
        :focus-visible {
            outline: 3px solid #b8860b;
            outline-offset: 2px;
        }