*,
        *::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', sans-serif;
            background: #f8f9fa;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0a3d62;
            text-decoration: underline;
            text-underline-offset: 2px;
            transition: color 0.2s;
        }
        a:hover {
            color: #e67e22;
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            color: #0b1a2a;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
        }
        h1 {
            font-size: 2.2rem;
            border-bottom: 3px solid #0a3d62;
            padding-bottom: 0.3rem;
        }
        h2 {
            font-size: 1.7rem;
            border-left: 4px solid #e67e22;
            padding-left: 0.75rem;
            margin-top: 2.2rem;
        }
        h3 {
            font-size: 1.3rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.1rem;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        .site-header {
            background: linear-gradient(145deg, #0a3d62 0%, #1a5276 100%);
            color: #fff;
            padding: 0.6rem 0;
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-decoration: none;
            background: rgba(255, 255, 255, 0.08);
            padding: 0.2rem 1rem 0.2rem 0.8rem;
            border-radius: 40px;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: background 0.3s;
        }
        .my-logo i {
            font-size: 1.3rem;
            color: #f1c40f;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
        }
        .my-logo small {
            font-weight: 400;
            font-size: 0.55rem;
            opacity: 0.8;
            display: block;
            line-height: 1;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-list {
            list-style: none;
            display: flex;
            gap: 0.2rem;
            margin: 0;
            padding: 0;
        }
        .nav-list li a {
            color: #f0f4f8;
            text-decoration: none;
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
            display: inline-block;
        }
        .nav-list li a:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #f1c40f;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            background: #eef2f7;
            padding: 0.5rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #dce3ec;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.2rem 0.5rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.4rem;
            color: #7f8c8d;
        }
        .breadcrumb a {
            color: #0a3d62;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #555;
            font-weight: 500;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 2rem 0;
        }
        @media (max-width:820px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: #fff;
            padding: 1.8rem 2rem;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .article-body .meta-info {
            font-size: 0.85rem;
            color: #5a6a7a;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.2rem;
            border-bottom: 1px solid #eef2f7;
            padding-bottom: 0.8rem;
        }
        .article-body .meta-info i {
            margin-right: 0.3rem;
        }
        .featured-img-wrap {
            margin: 1.5rem 0 2rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .featured-img-wrap img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-img-wrap figcaption {
            background: #f1f5f9;
            padding: 0.4rem 1rem;
            font-size: 0.8rem;
            color: #3a4a5a;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 14px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #eef2f7;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 2px solid #e67e22;
            padding-bottom: 0.4rem;
            margin-bottom: 0.8rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            padding: 0.3rem 0;
            border-bottom: 1px solid #f0f2f5;
        }
        .sidebar-card ul li a {
            text-decoration: none;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .sidebar-card ul li a:hover {
            color: #e67e22;
        }
        .search-form {
            display: flex;
            border: 1px solid #d0d8e0;
            border-radius: 40px;
            overflow: hidden;
            background: #fff;
            transition: box-shadow 0.3s;
        }
        .search-form:focus-within {
            box-shadow: 0 0 0 3px rgba(10, 61, 98, 0.15);
            border-color: #0a3d62;
        }
        .search-form input[type="text"] {
            flex: 1;
            border: none;
            padding: 0.7rem 1rem;
            font-size: 0.9rem;
            outline: none;
            background: transparent;
            min-width: 0;
        }
        .search-form button {
            background: #0a3d62;
            color: #fff;
            border: none;
            padding: 0.7rem 1.2rem;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.25s;
        }
        .search-form button:hover {
            background: #1a5276;
        }
        .comment-box,
        .rating-box {
            margin-top: 2.2rem;
            padding-top: 1.5rem;
            border-top: 2px dashed #dce3ec;
        }
        .comment-box h3,
        .rating-box h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 0.25rem;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid #d0d8e0;
            border-radius: 8px;
            font-size: 0.9rem;
            font-family: inherit;
            transition: border 0.25s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #0a3d62;
            outline: none;
            box-shadow: 0 0 0 3px rgba(10, 61, 98, 0.08);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #0a3d62;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background: #1a5276;
            transform: scale(1.02);
        }
        .btn-secondary {
            background: #e67e22;
        }
        .btn-secondary:hover {
            background: #cf6d17;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.2rem;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #d0d8e0;
            cursor: pointer;
            transition: color 0.2s, transform 0.1s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f1c40f;
        }
        .star-rating label:hover {
            transform: scale(1.15);
        }
        .site-footer {
            background: #0b1a2a;
            color: #cfdce8;
            padding: 2.5rem 0 1.2rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 1.8rem;
        }
        @media (max-width:640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
        }
        .footer-grid h4 {
            color: #fff;
            margin-top: 0;
            font-size: 1.05rem;
            border-bottom: 1px solid #2a3f54;
            padding-bottom: 0.4rem;
        }
        .footer-grid a {
            color: #a0b8cc;
            text-decoration: none;
            font-size: 0.9rem;
        }
        .footer-grid a:hover {
            color: #f1c40f;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-grid ul li {
            padding: 0.2rem 0;
        }
        friend-link {
            display: block;
            padding: 0.8rem 0 0.2rem;
            font-style: normal;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1rem 0.2rem 0;
        }
        .copyright {
            border-top: 1px solid #1f3347;
            padding-top: 1.2rem;
            font-size: 0.82rem;
            text-align: center;
            color: #7a94ad;
        }
        @media (max-width:760px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0a3d62;
                padding: 0.8rem 0.5rem;
                border-radius: 12px;
                margin-top: 0.5rem;
                gap: 0.1rem;
            }
            #nav-toggle:checked+.hamburger+.nav-list {
                display: flex;
            }
            .header-inner {
                position: relative;
            }
            .nav-wrap {
                flex-wrap: wrap;
                width: 100%;
            }
            #nav-toggle {
                display: none;
            }
            .article-body {
                padding: 1.2rem 1rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            .my-logo {
                font-size: 1.2rem;
                padding: 0.1rem 0.8rem 0.1rem 0.6rem;
            }
        }
        @media (max-width:480px) {
            .breadcrumb ol {
                font-size: 0.75rem;
            }
            .sidebar-card {
                padding: 1rem 0.9rem;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }
        .highlight {
            background: #fef9e7;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
        }
        .badge {
            display: inline-block;
            background: #0a3d62;
            color: #fff;
            font-size: 0.65rem;
            font-weight: 700;
            padding: 0.1rem 0.6rem;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }
        .insight-box {
            background: #eaf4fa;
            border-left: 4px solid #0a3d62;
            padding: 1rem 1.2rem;
            border-radius: 0 10px 10px 0;
            margin: 1.5rem 0;
        }
        .insight-box i {
            color: #0a3d62;
            margin-right: 0.4rem;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2rem 0;
        }
        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }
        .table-wrap th,
        .table-wrap td {
            padding: 0.6rem 0.8rem;
            border: 1px solid #dce3ec;
            text-align: left;
        }
        .table-wrap th {
            background: #0a3d62;
            color: #fff;
            font-weight: 600;
        }
        .table-wrap tr:nth-child(even) {
            background: #f6f9fc;
        }
        .emoji-lg {
            font-size: 1.4rem;
        }
        .section-toc {
            background: #f6f9fc;
            padding: 1rem 1.5rem;
            border-radius: 12px;
            margin: 1.2rem 0;
        }
        .section-toc ol {
            margin: 0.4rem 0 0 1rem;
        }
        .section-toc a {
            text-decoration: none;
        }