* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #0369a1;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0284c7;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1a3a4a 100%);
            color: #fff;
            padding: 18px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fbbf24;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #fcd34d;
        }
        .my-logo i {
            margin-right: 8px;
            color: #f87171;
        }
        .my-logo span {
            font-weight: 300;
            color: #94a3b8;
            font-size: 0.9rem;
            display: block;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            gap: 8px 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #e2e8f0;
            font-weight: 500;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fbbf24;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .breadcrumb {
            background: #f1f5f9;
            padding: 12px 0;
            border-bottom: 1px solid #e2e8f0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            align-items: center;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            color: #475569;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #94a3b8;
            font-size: 1.2rem;
        }
        .breadcrumb a {
            color: #0369a1;
        }
        .breadcrumb .active {
            color: #1e293b;
            font-weight: 600;
        }
        main {
            padding: 30px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #0b1a2e;
            line-height: 1.2;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .article-body h1 i {
            color: #f59e0b;
        }
        .article-body .meta {
            color: #64748b;
            font-size: 0.95rem;
            margin-bottom: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .article-body .meta i {
            margin-right: 4px;
        }
        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #0f2a3e;
            margin-top: 48px;
            margin-bottom: 16px;
            border-bottom: 3px solid #fbbf24;
            padding-bottom: 8px;
            display: inline-block;
        }
        .article-body h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: #1a3a4a;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2d4a5a;
            margin-top: 22px;
            margin-bottom: 8px;
        }
        .article-body p {
            margin-bottom: 18px;
            color: #334155;
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 24px;
            color: #334155;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body .highlight-box {
            background: #fefce8;
            border-left: 4px solid #f59e0b;
            padding: 18px 22px;
            border-radius: 0 10px 10px 0;
            margin: 24px 0;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .article-body .highlight-box strong {
            color: #b45309;
        }
        .article-body .stat-card {
            display: inline-block;
            background: #eef2ff;
            padding: 6px 18px;
            border-radius: 40px;
            font-weight: 600;
            color: #1e3a8a;
            font-size: 0.9rem;
            margin: 4px 0;
        }
        .featured-image-wrap {
            margin: 28px 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            position: relative;
        }
        .featured-image-wrap img {
            width: 100%;
            display: block;
            transition: transform 0.4s;
        }
        .featured-image-wrap:hover img {
            transform: scale(1.01);
        }
        .featured-image-wrap figcaption {
            background: rgba(11, 26, 46, 0.85);
            color: #f1f5f9;
            padding: 12px 18px;
            font-size: 0.9rem;
            text-align: center;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 16px;
            padding: 24px 22px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #e2e8f0;
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #0b1a2e;
            margin-bottom: 18px;
            padding-bottom: 10px;
            border-bottom: 2px solid #fbbf24;
        }
        .sidebar .link-list {
            list-style: none;
            margin: 0;
        }
        .sidebar .link-list li {
            margin-bottom: 10px;
            padding: 6px 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar .link-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #1e293b;
            font-weight: 500;
            transition: color 0.2s, padding-left 0.2s;
        }
        .sidebar .link-list a:hover {
            color: #0369a1;
            padding-left: 6px;
            text-decoration: none;
        }
        .sidebar .link-list a i {
            color: #f59e0b;
            font-size: 0.8rem;
        }
        .interactive-section {
            background: #ffffff;
            border-radius: 16px;
            padding: 28px 26px;
            margin-top: 40px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #e2e8f0;
        }
        .interactive-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: #0b1a2e;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .interactive-section h2 i {
            color: #f59e0b;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            font-weight: 600;
            display: block;
            margin-bottom: 4px;
            color: #1e293b;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #cbd5e1;
            border-radius: 10px;
            font-size: 1rem;
            transition: border 0.2s, box-shadow 0.2s;
            font-family: inherit;
            background: #f8fafc;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #0369a1;
            box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.15);
            background: #fff;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #0b1a2e;
            color: #fff;
            padding: 12px 30px;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: #1a3a4a;
            transform: translateY(-1px);
        }
        .btn i {
            font-size: 0.9rem;
        }
        .btn-secondary {
            background: #e2e8f0;
            color: #1e293b;
        }
        .btn-secondary:hover {
            background: #cbd5e1;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #cbd5e1;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars i.active {
            color: #f59e0b;
        }
        .rating-stars i:hover,
        .rating-stars i.hover {
            color: #fbbf24;
        }
        footer {
            background: #0b1a2e;
            color: #e2e8f0;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        footer a {
            color: #93c5fd;
        }
        footer a:hover {
            color: #fbbf24;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 28px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-col h4 {
            color: #fbbf24;
            font-size: 1.05rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .footer-col p,
        .footer-col li {
            font-size: 0.95rem;
            color: #cbd5e1;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 6px;
        }
        .footer-col ul li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        friend-link {
            display: block;
            padding: 18px 0 8px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 20px;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
            padding: 4px 12px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 30px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: rgba(255, 255, 255, 0.14);
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.85rem;
            color: #94a3b8;
        }
        .copyright strong {
            color: #e2e8f0;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding-top: 14px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                margin-top: 6px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                width: 100%;
                padding: 10px 12px;
                border-radius: 6px;
            }
            .header-inner {
                align-items: center;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
            .sidebar {
                position: relative;
                top: 0;
                margin-top: 30px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .breadcrumb ol {
                font-size: 0.8rem;
                gap: 4px 8px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .article-body h1 {
                font-size: 1.5rem;
            }
            .interactive-section {
                padding: 18px 16px;
            }
            .rating-stars {
                font-size: 1.5rem;
            }
        }
        .nav-menu {
            transition: all 0.25s ease;
        }
        .section-divider {
            height: 2px;
            background: linear-gradient(to right, #e2e8f0, transparent);
            margin: 40px 0;
        }
        .author-badge {
            display: flex;
            align-items: center;
            gap: 14px;
            background: #f1f5f9;
            padding: 14px 20px;
            border-radius: 12px;
            margin: 28px 0 18px;
        }
        .author-badge .avatar {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: #0b1a2e;
            color: #fbbf24;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            font-weight: 700;
        }
        .author-badge .info strong {
            display: block;
            font-size: 1rem;
            color: #0b1a2e;
        }
        .author-badge .info small {
            color: #64748b;
            font-size: 0.85rem;
        }