*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #1e2a3a;
            background: #fafbfc;
            padding: 0;
            margin: 0;
        }
        a {
            color: #0056b3;
            text-decoration: none;
            transition: color 0.2s, border-bottom 0.2s;
        }
        a:hover,
        a:focus {
            color: #ff6b35;
            border-bottom: 2px solid #ff6b35;
        }
        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, #0b1e33 0%, #1a3a5c 100%);
            color: #fff;
            padding: 16px 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: #fff;
            background: linear-gradient(90deg, #ff6b35, #f7c948);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 12px rgba(255, 107, 53, 0.3);
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .my-logo i {
            -webkit-text-fill-color: #ff6b35;
            margin-right: 6px;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 6px;
        }
        .hamburger span {
            width: 28px;
            height: 3px;
            background: #fff;
            border-radius: 4px;
            transition: 0.3s;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }
        .nav-menu {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            align-items: center;
            transition: max-height 0.4s ease, opacity 0.3s ease;
        }
        .nav-menu a {
            color: #e8edf3;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .nav-menu a:hover {
            color: #ff6b35;
            border-bottom-color: #ff6b35;
        }
        .nav-menu .search-toggle {
            background: rgba(255, 255, 255, 0.08);
            padding: 6px 14px;
            border-radius: 30px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .nav-menu .search-toggle i {
            margin-right: 6px;
        }
        .breadcrumb {
            background: #eef2f7;
            padding: 10px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dce3ec;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #8a9bb5;
        }
        .breadcrumb a {
            color: #2a4a7a;
        }
        .breadcrumb .current {
            color: #6c7a8f;
            font-weight: 500;
        }
        main {
            padding: 40px 0 60px;
        }
        .page-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: #0b1e33;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .page-title i {
            color: #ff6b35;
            margin-right: 10px;
        }
        .last-updated {
            display: inline-block;
            background: #eef2f7;
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #4a5a72;
            margin-bottom: 24px;
        }
        .last-updated i {
            margin-right: 6px;
            color: #ff6b35;
        }
        article h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #0b1e33;
            margin: 32px 0 16px;
            line-height: 1.2;
        }
        article h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: #143250;
            margin: 40px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid #ff6b35;
            display: inline-block;
        }
        article h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1a3a5c;
            margin: 28px 0 12px;
        }
        article h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #2a4a7a;
            margin: 20px 0 10px;
        }
        article p {
            margin-bottom: 18px;
            font-size: 1.05rem;
            color: #2a3a4a;
        }
        article ul,
        article ol {
            margin: 12px 0 20px 24px;
            font-size: 1.02rem;
            color: #2a3a4a;
        }
        article li {
            margin-bottom: 8px;
        }
        .highlight-box {
            background: #f0f6ff;
            border-left: 5px solid #ff6b35;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #0b1e33;
        }
        .emoji-big {
            font-size: 1.4rem;
            margin-right: 6px;
        }
        .featured-image {
            margin: 32px 0;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }
        .featured-image img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 12px 18px;
            background: #eef2f7;
            font-size: 0.9rem;
            color: #4a5a72;
            font-style: italic;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0 32px;
            font-size: 0.98rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .data-table thead {
            background: #0b1e33;
            color: #fff;
        }
        .data-table th,
        .data-table td {
            padding: 14px 18px;
            text-align: left;
            border-bottom: 1px solid #dce3ec;
        }
        .data-table tbody tr:hover {
            background: #f4f8ff;
        }
        .data-table tbody tr:nth-child(even) {
            background: #fafbfc;
        }
        .form-section {
            background: #fff;
            border-radius: 16px;
            padding: 32px 36px;
            margin: 40px 0;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            border: 1px solid #e8edf4;
        }
        .form-section h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            color: #1a3a5c;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #dce3ec;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.3s;
            background: #fafbfc;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #ff6b35;
            outline: none;
            background: #fff;
        }
        .form-group textarea {
            min-height: 110px;
            resize: vertical;
        }
        .btn {
            display: inline-block;
            background: #ff6b35;
            color: #fff;
            padding: 12px 32px;
            border: none;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            box-shadow: 0 4px 14px rgba(255, 107, 53, 0.3);
        }
        .btn:hover {
            background: #e55a2b;
            transform: translateY(-2px);
        }
        .btn i {
            margin-right: 8px;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #dce3ec;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            transition: color 0.2s;
            cursor: pointer;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: #f7c948;
        }
        .related-links {
            background: #f4f8ff;
            border-radius: 16px;
            padding: 24px 28px;
            margin: 32px 0;
            border: 1px solid #dce8f4;
        }
        .related-links h3 {
            margin-top: 0;
            color: #0b1e33;
        }
        .related-links ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 10px 18px;
        }
        .related-links li {
            margin: 0;
        }
        .related-links a {
            display: block;
            padding: 8px 12px;
            border-radius: 8px;
            background: #fff;
            border: 1px solid #e0e8f2;
            transition: 0.2s;
            font-weight: 500;
        }
        .related-links a:hover {
            background: #ff6b35;
            color: #fff;
            border-color: #ff6b35;
        }
        .site-footer {
            background: #0b1e33;
            color: #c8d4e3;
            padding: 40px 0 24px;
            margin-top: 48px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 28px;
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 12px;
        }
        .footer-inner a {
            color: #b0c4dd;
            display: block;
            margin-bottom: 6px;
        }
        .footer-inner a:hover {
            color: #ff6b35;
        }
        .footer-bottom {
            border-top: 1px solid #1a3a5c;
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.9rem;
        }
        .footer-bottom .copyright {
            color: #8a9bb5;
        }
        friend-link {
            display: block;
            margin-top: 8px;
            font-style: normal;
        }
        friend-link a {
            display: inline-block;
            margin-right: 16px;
            margin-bottom: 4px;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 6px;
                padding: 16px 0 8px;
                max-height: 0;
                opacity: 0;
                overflow: hidden;
            }
            .nav-menu.open {
                display: flex;
                max-height: 600px;
                opacity: 1;
            }
            .nav-menu a {
                padding: 10px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                width: 100%;
            }
            .header-inner {
                align-items: center;
            }
            .page-title {
                font-size: 1.8rem;
            }
            article h1 {
                font-size: 1.8rem;
            }
            article h2 {
                font-size: 1.4rem;
            }
            article h3 {
                font-size: 1.2rem;
            }
            .form-section {
                padding: 20px 18px;
            }
            .data-table {
                font-size: 0.85rem;
            }
            .data-table th,
            .data-table td {
                padding: 10px 12px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .related-links ul {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 14px;
            }
        }
        @media (max-width: 480px) {
            .page-title {
                font-size: 1.4rem;
            }
            article h1 {
                font-size: 1.4rem;
            }
            article h2 {
                font-size: 1.2rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .btn {
                padding: 10px 22px;
                font-size: 0.9rem;
            }
        }
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .schema-hidden {
            display: none;
        }
        .tag {
            display: inline-block;
            background: #e8edf4;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #1a3a5c;
            margin-right: 6px;
        }
        .text-muted {
            color: #6c7a8f;
        }
        .flex-between {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        @media (max-width: 640px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .inline-icon {
            margin-right: 6px;
            color: #ff6b35;
        }
        .badge {
            background: #ff6b35;
            color: #fff;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
        }