*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fa;
            color: #1a2634;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0a5c7e;
            text-decoration: none;
            transition: color 0.2s, border-color 0.2s;
        }
        a:hover {
            color: #0a3b4e;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
        li {
            margin-bottom: 0.35rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            margin-top: 0;
            color: #0f2b3a;
        }
        h1 {
            font-size: 2.2rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.7rem;
            margin-bottom: 0.6rem;
            margin-top: 2.2rem;
            border-bottom: 3px solid #1f7a9e;
            padding-bottom: 0.35rem;
        }
        h3 {
            font-size: 1.3rem;
            margin-bottom: 0.4rem;
            margin-top: 1.6rem;
            color: #144a5e;
        }
        h4 {
            font-size: 1.05rem;
            margin-bottom: 0.3rem;
            margin-top: 1.2rem;
            color: #1d5f7a;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 0;
            background: #0a5c7e;
            color: #fff;
            padding: 0.5rem 1rem;
            z-index: 1000;
            transition: top 0.25s;
        }
        .skip-link:focus {
            top: 0;
        }
        .site-header {
            background: linear-gradient(145deg, #0f2b3a 0%, #1a4a5e 100%);
            color: #fff;
            padding: 0.6rem 0;
            border-bottom: 4px solid #2d9bc7;
            position: sticky;
            top: 0;
            z-index: 900;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            padding: 0.2rem 0.9rem 0.2rem 0.9rem;
            border-radius: 40px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: background 0.3s, border-color 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            font-size: 1.5rem;
            color: #7fd4ff;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.18);
            border-color: #7fd4ff;
            text-decoration: none;
        }
        .my-logo span {
            font-weight: 300;
            color: #b8e2f2;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1.5rem;
            padding: 0.3rem 0.7rem;
            border-radius: 8px;
            cursor: pointer;
            transition: border-color 0.2s, background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #7fd4ff;
        }
        .nav-toggle[aria-expanded="true"] i::before {
            content: "\f00d";
        }
        .primary-nav {
            display: flex;
            gap: 0.1rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .primary-nav a {
            color: #e2f0f7;
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .primary-nav a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
            border-color: rgba(255, 255, 255, 0.15);
        }
        .primary-nav a i {
            margin-right: 0.3rem;
            font-size: 0.85rem;
        }
        .breadcrumb {
            background: #eaf0f5;
            padding: 0.5rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d0dde6;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.5rem;
            color: #6b7f8e;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #0a5c7e;
        }
        .breadcrumb .current {
            color: #2d4a5a;
            font-weight: 600;
        }
        .search-section {
            background: #e3edf4;
            padding: 1.6rem 0;
            border-bottom: 1px solid #c8d8e4;
        }
        .search-form {
            display: flex;
            max-width: 580px;
            margin: 0 auto;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .search-form label {
            position: absolute;
            width: 1px;
            height: 1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
        }
        .search-form input[type="search"] {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #b0c8d8;
            border-radius: 40px;
            font-size: 1rem;
            background: #fff;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .search-form input[type="search"]:focus {
            outline: none;
            border-color: #1f7a9e;
            box-shadow: 0 0 0 3px rgba(31, 122, 158, 0.2);
        }
        .search-form button {
            background: #0a5c7e;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #0a3b4e;
            transform: scale(1.02);
        }
        .main-content {
            padding: 2.2rem 0 3rem;
        }
        .article-wrapper {
            background: #fff;
            border-radius: 20px;
            padding: 2.2rem 2rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
        }
        .last-updated {
            font-size: 0.85rem;
            color: #5a6f7e;
            border-bottom: 1px dashed #cbd8e3;
            padding-bottom: 0.6rem;
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .featured-figure {
            margin: 1.8rem 0 2.2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            background: #f0f4f8;
        }
        .featured-figure img {
            width: 100%;
            height: auto;
            aspect-ratio: 1200/675;
            object-fit: cover;
        }
        .featured-figure figcaption {
            padding: 0.7rem 1.2rem;
            font-size: 0.9rem;
            color: #3a4f5e;
            background: #f0f4f8;
            font-style: italic;
        }
        .version-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 1.8rem 0;
        }
        .version-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.5rem 1.2rem;
            border-left: 5px solid #1f7a9e;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
            transition: transform 0.25s, box-shadow 0.25s;
        }
        .version-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }
        .version-card h3 {
            margin-top: 0;
            color: #0f2b3a;
        }
        .version-card .badge {
            display: inline-block;
            background: #1f7a9e;
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.2rem 0.7rem;
            border-radius: 30px;
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .comp-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.8rem 0;
            font-size: 0.92rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .comp-table thead {
            background: #0f2b3a;
            color: #fff;
        }
        .comp-table th,
        .comp-table td {
            padding: 0.75rem 1rem;
            text-align: left;
            border-bottom: 1px solid #dce5ed;
        }
        .comp-table tbody tr:hover {
            background: #f0f6fb;
        }
        .comp-table tbody tr:nth-child(even) {
            background: #f8fafc;
        }
        .form-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.8rem 1.5rem;
            border: 1px solid #dce5ed;
            margin: 1.8rem 0;
        }
        .form-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.25rem;
            color: #1a2c3a;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.65rem 1rem;
            border: 2px solid #c8d6e0;
            border-radius: 10px;
            font-size: 0.95rem;
            background: #fff;
            transition: border-color 0.3s, box-shadow 0.3s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #1f7a9e;
            box-shadow: 0 0 0 3px rgba(31, 122, 158, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-actions {
            display: flex;
            gap: 0.8rem;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.65rem 1.6rem;
            border: none;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
        }
        .btn-primary {
            background: #0a5c7e;
            color: #fff;
        }
        .btn-primary:hover {
            background: #0a3b4e;
            transform: scale(1.02);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #0a5c7e;
            color: #0a5c7e;
        }
        .btn-outline:hover {
            background: #0a5c7e;
            color: #fff;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.15rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #c8d6e0;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label i {
            pointer-events: none;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f5b342;
        }
        friend-link {
            display: block;
            padding: 1.2rem 0;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.5rem;
            padding: 0;
            margin: 0.6rem 0 0;
        }
        friend-link ul li a {
            background: #eaf0f5;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.88rem;
            border: 1px solid #c8d8e4;
            transition: background 0.2s, border-color 0.2s;
        }
        friend-link ul li a:hover {
            background: #d0e0ec;
            border-color: #1f7a9e;
            text-decoration: none;
        }
        .site-footer {
            background: #0f2b3a;
            color: #c8dce8;
            padding: 2rem 0 1.2rem;
            font-size: 0.9rem;
            border-top: 4px solid #2d9bc7;
        }
        .site-footer a {
            color: #8fc8e0;
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.2rem;
            align-items: flex-start;
        }
        .copyright {
            font-size: 0.82rem;
            color: #8aa6b8;
            margin-top: 0.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 0.8rem;
            text-align: center;
            width: 100%;
        }
        @media (max-width: 860px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(15, 43, 58, 0.97);
                padding: 1rem 0.6rem;
                border-radius: 0 0 16px 16px;
                margin-top: 0.6rem;
                gap: 0.3rem;
                border-top: 2px solid #2d9bc7;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 0.5rem 1rem;
                border-radius: 8px;
                white-space: normal;
            }
            .header-inner {
                align-items: center;
            }
            .my-logo {
                font-size: 1.4rem;
                padding: 0.15rem 0.7rem;
            }
            .article-wrapper {
                padding: 1.2rem 1rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            .version-grid {
                grid-template-columns: 1fr;
            }
            .comp-table {
                font-size: 0.78rem;
            }
            .comp-table th,
            .comp-table td {
                padding: 0.4rem 0.5rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
            .footer-inner {
                flex-direction: column;
                gap: 1rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.85rem;
            }
            .article-wrapper {
                padding: 0.9rem 0.7rem;
                border-radius: 12px;
            }
            h1 {
                font-size: 1.3rem;
            }
            h2 {
                font-size: 1.15rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .form-card {
                padding: 1rem 0.9rem;
            }
            .star-rating label {
                font-size: 1.4rem;
            }
        }
        @media print {
            .site-header,
            .search-section,
            .breadcrumb,
            .nav-toggle,
            .form-card,
            .site-footer {
                display: none !important;
            }
            .article-wrapper {
                box-shadow: none;
                padding: 0;
            }
            body {
                background: #fff;
                font-size: 11pt;
            }
        }