*,
        *::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: #f5f7fb;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #0a3d62;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #e74c3c;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #0b2b3d;
        }
        h1 {
            font-size: 2.2rem;
            border-left: 6px solid #e74c3c;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.7rem;
            border-bottom: 2px solid #dce1e8;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.3rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
        }
        strong {
            color: #0a3d62;
        }
        .highlight {
            background: #fef3c7;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
        }
        .emoji-lg {
            font-size: 1.4rem;
            margin-right: 0.3rem;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 0 0.8rem;
            border-bottom: 2px solid #dce1e8;
            margin-bottom: 0.8rem;
            position: relative;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0a3d62, #e74c3c);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #e74c3c;
            font-size: 1.8rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #0a3d62;
            border-radius: 8px;
            font-size: 1.5rem;
            padding: 0.3rem 0.7rem;
            cursor: pointer;
            color: #0a3d62;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #eef2f7;
        }
        .nav-toggle .fa-times {
            display: none;
        }
        .nav-toggle.active .fa-bars {
            display: none;
        }
        .nav-toggle.active .fa-times {
            display: inline;
        }
        .primary-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 0.2rem 1.2rem;
            align-items: center;
        }
        .primary-nav a {
            font-weight: 500;
            padding: 0.3rem 0.2rem;
            border-bottom: 2px solid transparent;
            font-size: 0.95rem;
        }
        .primary-nav a:hover {
            border-bottom-color: #e74c3c;
            text-decoration: none;
        }
        .primary-nav a.active {
            border-bottom-color: #e74c3c;
            color: #e74c3c;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.6rem 0;
            margin: 0 0 0.8rem;
            font-size: 0.85rem;
            color: #5a6b7a;
            gap: 0.3rem 0.6rem;
            background: #eef2f7;
            border-radius: 30px;
            padding: 0.5rem 1.2rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #9aa8b7;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #0a3d62;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #5a6b7a;
            font-weight: 500;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem 2.5rem;
            margin: 1.5rem 0 2rem;
        }
        @media (min-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr 320px;
            }
        }
        .main-article {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.8rem 1.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        @media (min-width: 768px) {
            .main-article {
                padding: 2.5rem 2.8rem;
            }
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }
        .sidebar-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .sidebar-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 2px solid #f0f2f5;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .search-form {
            display: flex;
            border: 2px solid #dce1e8;
            border-radius: 40px;
            overflow: hidden;
            transition: border-color 0.3s;
            background: #fff;
        }
        .search-form:focus-within {
            border-color: #0a3d62;
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 0.7rem 1.2rem;
            font-size: 0.95rem;
            outline: none;
            background: transparent;
        }
        .search-form button {
            background: #0a3d62;
            color: #fff;
            border: none;
            padding: 0.7rem 1.4rem;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form button:hover {
            background: #e74c3c;
        }
        .comment-section,
        .rating-section {
            margin-top: 2.5rem;
            padding-top: 1.8rem;
            border-top: 2px solid #eef2f7;
        }
        .comment-section h3,
        .rating-section h3 {
            margin-top: 0;
        }
        .comment-form textarea {
            width: 100%;
            border: 2px solid #dce1e8;
            border-radius: 12px;
            padding: 0.8rem 1rem;
            font-size: 0.95rem;
            font-family: inherit;
            resize: vertical;
            min-height: 100px;
            transition: border-color 0.3s;
        }
        .comment-form textarea:focus {
            border-color: #0a3d62;
            outline: none;
        }
        .comment-form .form-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-top: 0.8rem;
            align-items: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #0a3d62;
            color: #fff;
            border: none;
            padding: 0.6rem 1.6rem;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .btn:hover {
            background: #e74c3c;
            transform: translateY(-1px);
            color: #fff;
            text-decoration: none;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #0a3d62;
            color: #0a3d62;
        }
        .btn-outline:hover {
            background: #0a3d62;
            color: #fff;
        }
        .rating-stars {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.3rem;
            font-size: 1.6rem;
            margin: 0.6rem 0 1rem;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            cursor: pointer;
            color: #dce1e8;
            transition: color 0.15s;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: #f1c40f;
        }
        .rating-value {
            font-weight: 700;
            font-size: 1.1rem;
            color: #0a3d62;
        }
        .link-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .link-list li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #f0f2f5;
            margin-bottom: 0;
        }
        .link-list li:last-child {
            border-bottom: none;
        }
        .link-list a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 500;
        }
        .link-list a i {
            width: 1.2rem;
            color: #e74c3c;
        }
        .featured-image {
            margin: 1.8rem 0 2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
            background: #eef2f7;
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
            min-height: 200px;
            max-height: 480px;
        }
        .featured-image figcaption {
            padding: 0.8rem 1.2rem;
            font-size: 0.85rem;
            color: #5a6b7a;
            background: #fafbfc;
            border-top: 1px solid #eef2f7;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .data-table th {
            background: #0a3d62;
            color: #fff;
            padding: 0.7rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #eef2f7;
            background: #fff;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: #f8f9fb;
        }
        .site-footer {
            margin-top: 3rem;
            padding: 2rem 0 1.5rem;
            border-top: 2px solid #dce1e8;
            font-size: 0.9rem;
            color: #5a6b7a;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem 2rem;
        }
        .footer-col {
            flex: 1 1 200px;
        }
        .footer-col h4 {
            margin-top: 0;
            font-size: 1rem;
            color: #0b2b3d;
        }
        friend-link {
            display: block;
            margin: 0.4rem 0;
        }
        friend-link a {
            display: inline-block;
            padding: 0.2rem 0;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            border-top: 1px solid #eef2f7;
            font-size: 0.85rem;
            color: #7a8a9a;
        }
        @media (max-width: 767px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                padding: 1rem 0.5rem;
                border-radius: 16px;
                margin-top: 0.8rem;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
                gap: 0.5rem;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 0.5rem 1rem;
                border-radius: 8px;
            }
            .primary-nav a:hover {
                background: #f0f4fa;
                border-bottom-color: transparent;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .main-article {
                padding: 1.2rem 1rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 0.4rem 1rem;
            }
            .data-table {
                font-size: 0.8rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.5rem 0.6rem;
            }
        }
        @media (min-width: 768px) and (max-width: 991px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
        }
        .last-updated {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #eef2f7;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #5a6b7a;
            margin-bottom: 1rem;
        }
        .tag {
            display: inline-block;
            background: #f0f4fa;
            padding: 0.15rem 0.8rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            color: #0a3d62;
            margin-right: 0.3rem;
        }
        .quote-block {
            background: #f8f9fb;
            border-left: 5px solid #e74c3c;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #2c3e50;
        }
        .quote-block cite {
            display: block;
            margin-top: 0.5rem;
            font-size: 0.85rem;
            font-style: normal;
            color: #7a8a9a;
        }
        .pro-tip {
            background: #e8f0fe;
            border-radius: 12px;
            padding: 1rem 1.5rem;
            margin: 1.2rem 0;
            border-left: 4px solid #0a3d62;
        }
        .pro-tip strong {
            color: #0a3d62;
        }
        .anchor-offset {
            scroll-margin-top: 80px;
        }
        friend-link {
            display: block;
        }
        friend-link a {
            color: #0a3d62;
        }
        friend-link a:hover {
            color: #e74c3c;
        }