*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.8;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #1d4ed8;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: #0f3b8e;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.8rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            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;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #facc15, #f97316);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            transition: opacity 0.3s;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #facc15;
            margin-right: 0.3rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.5rem;
            padding: 0.3rem 0.7rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.8rem;
            list-style: none;
            padding: 0;
            margin: 0;
            align-items: center;
        }
        .nav-menu li a {
            color: #e2e8f0;
            font-weight: 500;
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            font-size: 0.92rem;
            transition: background 0.3s, color 0.3s;
            display: block;
        }
        .nav-menu li a:hover,
        .nav-menu li a:focus {
            background: rgba(255, 255, 255, 0.12);
            color: #facc15;
            text-decoration: none;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 0.6rem 0;
            font-size: 0.88rem;
            color: #475569;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.6rem;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.5rem;
            color: #94a3b8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #1d4ed8;
        }
        .breadcrumb .active {
            color: #334155;
            font-weight: 600;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        @media(max-width: 920px) {
            .main-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        .article-body h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 0 0 0.6rem 0;
            color: #0f172a;
            letter-spacing: -0.02em;
        }
        .article-body h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 2.2rem 0 0.8rem 0;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #facc15;
            color: #0f172a;
        }
        .article-body h3 {
            font-size: 1.45rem;
            font-weight: 600;
            margin: 1.8rem 0 0.6rem 0;
            color: #1e293b;
        }
        .article-body h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.4rem 0 0.4rem 0;
            color: #334155;
        }
        .article-body p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: #1e293b;
        }
        .article-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            font-size: 0.92rem;
            color: #64748b;
            margin-bottom: 1.8rem;
            padding: 0.6rem 0;
            border-bottom: 1px solid #d1d9e6;
        }
        .article-body .meta i {
            margin-right: 0.3rem;
        }
        .article-body .last-updated {
            background: #fef9e7;
            padding: 0.4rem 1rem;
            border-radius: 30px;
            display: inline-block;
            font-weight: 600;
            font-size: 0.9rem;
            color: #92400e;
            border: 1px solid #fde68a;
        }
        .featured-image {
            margin: 1.8rem 0 2.2rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            background: #e2e8f0;
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
            min-height: 280px;
            max-height: 520px;
        }
        .featured-image figcaption {
            padding: 0.7rem 1.2rem;
            background: #f1f5f9;
            font-size: 0.88rem;
            color: #475569;
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(135deg, #eef2ff, #e0e7ff);
            border-left: 5px solid #4f46e5;
            padding: 1.4rem 1.8rem;
            border-radius: 12px;
            margin: 1.8rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1.2rem;
            margin: 1.8rem 0;
        }
        .stat-card {
            background: #fff;
            border-radius: 14px;
            padding: 1.4rem 1rem;
            text-align: center;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
            border: 1px solid #e2e8f0;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        .stat-card .number {
            font-size: 2.4rem;
            font-weight: 800;
            color: #1d4ed8;
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 0.92rem;
            color: #475569;
            font-weight: 500;
        }
        .btn {
            display: inline-block;
            background: #1d4ed8;
            color: #fff;
            padding: 0.6rem 1.5rem;
            border-radius: 30px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
        }
        .btn:hover {
            background: #1e3bb3;
            transform: translateY(-2px);
            text-decoration: none;
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #1d4ed8;
            color: #1d4ed8;
        }
        .btn-outline:hover {
            background: #1d4ed8;
            color: #fff;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.6rem 1.4rem;
            margin-bottom: 1.8rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #0f172a;
            border-bottom: 2px solid #facc15;
            padding-bottom: 0.4rem;
        }
        .sidebar-link-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-link-list li {
            margin-bottom: 0.5rem;
        }
        .sidebar-link-list li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .sidebar-link-list li a:hover {
            background: #f1f5f9;
            text-decoration: none;
        }
        .sidebar-link-list li a i {
            color: #f97316;
            width: 1.2rem;
            text-align: center;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.6rem 1rem;
            border: 2px solid #d1d9e6;
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input:focus {
            border-color: #1d4ed8;
        }
        .search-form button {
            background: #1d4ed8;
            color: #fff;
            border: none;
            border-radius: 50%;
            width: 42px;
            height: 42px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #1e3bb3;
        }
        .comment-section,
        .rating-section {
            margin-top: 2.5rem;
            padding-top: 1.8rem;
            border-top: 2px solid #d1d9e6;
        }
        .comment-section h3,
        .rating-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .comment-form textarea,
        .comment-form input {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #d1d9e6;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            margin-bottom: 0.8rem;
            transition: border 0.3s;
            resize: vertical;
        }
        .comment-form textarea:focus,
        .comment-form input:focus {
            border-color: #1d4ed8;
            outline: none;
        }
        .comment-form .btn {
            align-self: flex-start;
        }
        .rating-stars {
            display: flex;
            gap: 0.4rem;
            font-size: 2rem;
            color: #d1d9e6;
            cursor: pointer;
            transition: color 0.2s;
            margin-bottom: 1rem;
        }
        .rating-stars i.active,
        .rating-stars i:hover,
        .rating-stars i:hover~i {
            color: #facc15;
        }
        .rating-stars i {
            transition: color 0.2s;
        }
        .rating-form .btn {
            margin-top: 0.4rem;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 2.5rem 0 1.2rem 0;
            margin-top: 2.5rem;
            border-top: 4px solid #facc15;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        @media(max-width: 720px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        .footer-inner p,
        .footer-inner a {
            font-size: 0.92rem;
            color: #94a3b8;
        }
        .footer-inner a:hover {
            color: #facc15;
        }
        friend-link {
            display: block;
            margin-top: 0.4rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1rem;
            margin-bottom: 0.3rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            border-top: 1px solid #1e293b;
            font-size: 0.88rem;
            color: #64748b;
        }
        @media(max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #1e293b;
                padding: 0.8rem 0.6rem;
                border-radius: 12px;
                margin-top: 0.5rem;
                gap: 0.2rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li a {
                padding: 0.6rem 0.8rem;
                border-radius: 8px;
            }
            .article-body h1 {
                font-size: 1.9rem;
            }
            .article-body h2 {
                font-size: 1.5rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .article-body p {
                font-size: 0.98rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .sidebar {
                position: static;
            }
            .my-logo {
                font-size: 1.3rem;
            }
        }
        @media(max-width: 480px) {
            .container {
                padding: 0 0.9rem;
            }
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .article-body h1 {
                font-size: 1.6rem;
            }
            .rating-stars {
                font-size: 1.6rem;
            }
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #f1f5f9;
            font-weight: 700;
            color: #0f172a;
        }
        tr:hover td {
            background: #f8fafc;
        }
        .tag {
            display: inline-block;
            background: #e2e8f0;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #334155;
            margin-right: 0.3rem;
        }
        .tag-gold {
            background: #fef3c7;
            color: #92400e;
        }
        .tag-blue {
            background: #dbeafe;
            color: #1e40af;
        }