*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f5f7fc;
            color: #1e1e2a;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #b45309;
            text-decoration: none;
            transition: color 0.25s;
        }
        a:hover,
        a:focus {
            color: #7b2d00;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1a2f3f 100%);
            padding: 16px 0;
            border-bottom: 4px solid #f59e0b;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fbbf24;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 8px rgba(251, 191, 36, 0.25);
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #fcd34d;
        }
        .my-logo small {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            color: #94a3b8;
            letter-spacing: 1px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fbbf24;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(251, 191, 36, 0.12);
        }
        .primary-nav {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        .primary-nav a {
            color: #e2e8f0;
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .primary-nav a:hover,
        .primary-nav a:focus {
            background: #fbbf24;
            color: #0b1a2e;
            text-decoration: none;
        }
        .primary-nav a i {
            margin-right: 6px;
        }
        .breadcrumb {
            background: #ffffffdd;
            backdrop-filter: blur(6px);
            padding: 10px 0;
            border-bottom: 1px solid #e2e8f0;
            font-size: 0.85rem;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #94a3b8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #475569;
        }
        .breadcrumb .current {
            color: #b45309;
            font-weight: 600;
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #0b1a2e;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .article-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 30px;
            color: #64748b;
            font-size: 0.9rem;
            margin-bottom: 28px;
            border-bottom: 1px solid #e2e8f0;
            padding-bottom: 16px;
        }
        .article-body .meta i {
            margin-right: 6px;
            color: #f59e0b;
        }
        .article-body h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #0f1d2f;
            margin-top: 48px;
            margin-bottom: 16px;
            border-left: 5px solid #f59e0b;
            padding-left: 18px;
        }
        .article-body h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1a2f3f;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        .article-body h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2d3f4f;
            margin-top: 24px;
            margin-bottom: 8px;
        }
        .article-body p {
            margin-bottom: 18px;
            color: #2d3748;
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 22px 28px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            border-left: 4px solid #f59e0b;
            background: #fef9ec;
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #3d4a5c;
        }
        .article-body .highlight-box {
            background: #eef2ff;
            border: 1px solid #c7d2fe;
            border-radius: 14px;
            padding: 20px 24px;
            margin: 24px 0;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }
        .article-body .highlight-box strong {
            color: #4338ca;
        }
        .featured-image {
            margin: 30px 0;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.10);
        }
        .featured-image figcaption {
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
            margin-top: 8px;
        }
        .btn-download {
            display: inline-block;
            background: linear-gradient(135deg, #f59e0b, #d97706);
            color: #fff !important;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 60px;
            font-size: 1.1rem;
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
            transition: transform 0.25s, box-shadow 0.25s;
            border: none;
            cursor: pointer;
        }
        .btn-download:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(245, 158, 11, 0.45);
            text-decoration: none;
            color: #fff !important;
        }
        .btn-download i {
            margin-right: 10px;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
        }
        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .table-wrap th {
            background: #0b1a2e;
            color: #fbbf24;
            font-weight: 600;
            padding: 12px 16px;
            text-align: left;
        }
        .table-wrap td {
            padding: 10px 16px;
            border-bottom: 1px solid #e2e8f0;
        }
        .table-wrap tr:last-child td {
            border-bottom: none;
        }
        .table-wrap tr:hover td {
            background: #f8fafc;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 20px;
            margin-bottom: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #edf2f7;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #0b1a2e;
            margin-bottom: 14px;
            border-bottom: 2px solid #f59e0b;
            padding-bottom: 8px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            margin-bottom: 10px;
        }
        .sidebar-card li a {
            color: #1e293b;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card li a:hover {
            color: #b45309;
            text-decoration: none;
        }
        .sidebar-card li a i {
            color: #f59e0b;
            width: 20px;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-bottom: 6px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.25s;
            background: #f9fafb;
        }
        .search-form input:focus {
            border-color: #f59e0b;
            background: #fff;
        }
        .search-form button {
            background: #f59e0b;
            border: none;
            color: #fff;
            padding: 0 20px;
            border-radius: 30px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.2s;
        }
        .search-form button:hover {
            background: #d97706;
            transform: scale(1.03);
        }
        .comment-form textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            resize: vertical;
            min-height: 80px;
            transition: border 0.25s;
            background: #f9fafb;
        }
        .comment-form textarea:focus {
            border-color: #f59e0b;
            background: #fff;
            outline: none;
        }
        .comment-form .form-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 10px;
            align-items: center;
        }
        .comment-form .form-row input {
            flex: 1;
            min-width: 140px;
            padding: 10px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 30px;
            font-size: 0.9rem;
            background: #f9fafb;
            transition: border 0.25s;
        }
        .comment-form .form-row input:focus {
            border-color: #f59e0b;
            background: #fff;
            outline: none;
        }
        .comment-form .form-row button {
            background: #0b1a2e;
            color: #fff;
            border: none;
            padding: 10px 28px;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.2s;
        }
        .comment-form .form-row button:hover {
            background: #1a2f3f;
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            gap: 4px;
            font-size: 1.6rem;
            color: #d1d5db;
            cursor: pointer;
            direction: rtl;
            margin: 8px 0;
        }
        .star-rating i {
            transition: color 0.2s, transform 0.2s;
        }
        .star-rating i:hover,
        .star-rating i:hover~i {
            color: #f59e0b;
            transform: scale(1.1);
        }
        .star-rating .active {
            color: #f59e0b;
        }
        friend-link {
            display: block;
            background: #0b1a2e;
            color: #e2e8f0;
            padding: 28px 0;
            margin-top: 40px;
            border-top: 4px solid #f59e0b;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            justify-content: center;
        }
        friend-link a {
            color: #fbbf24;
            font-weight: 500;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: rgba(251, 191, 36, 0.12);
            text-decoration: none;
            color: #fcd34d;
        }
        friend-link .label {
            font-weight: 600;
            color: #94a3b8;
            letter-spacing: 1px;
            font-size: 0.85rem;
            text-transform: uppercase;
            width: 100%;
            text-align: center;
            margin-bottom: 4px;
        }
        .site-footer {
            background: #081220;
            color: #cbd5e1;
            padding: 28px 0;
            text-align: center;
            font-size: 0.9rem;
        }
        .site-footer .copyright {
            margin-top: 8px;
            color: #64748b;
            font-size: 0.8rem;
        }
        .site-footer a {
            color: #fbbf24;
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                margin-top: 14px;
                background: #0f1d2f;
                padding: 12px 8px;
                border-radius: 16px;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 10px 16px;
                border-radius: 10px;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.5rem;
            }
            .article-body h3 {
                font-size: 1.25rem;
            }
            .article-body h4 {
                font-size: 1.05rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .sidebar {
                position: static;
            }
            .content-grid {
                gap: 24px;
            }
            .header-inner {
                align-items: center;
            }
        }
        @media(min-width:769px) {
            .primary-nav {
                display: flex !important;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .flex-center {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .gap-8 {
            gap: 8px;
        }
        .skeleton {
            background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: 8px;
        }
        @keyframes shimmer {
            0% {
                background-position: -200% 0;
            }
            100% {
                background-position: 200% 0;
            }
        }
        @media print {
            .site-header,
            .breadcrumb,
            .sidebar,
            .search-form,
            .comment-form,
            .nav-toggle,
            friend-link,
            .site-footer {
                display: none !important;
            }
            .content-grid {
                display: block;
            }
            .article-body h1 {
                font-size: 22pt;
            }
            body {
                font-size: 12pt;
                background: #fff;
            }
        }