* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            line-height: 1.8;
            color: #1e293b;
            background: #f8fafc;
            padding: 0 1rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #0f3b5e;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #e67e22;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.5rem;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #0a1e2b;
            margin: 1.5rem 0 1rem;
            line-height: 1.2;
            border-left: 6px solid #e67e22;
            padding-left: 1.2rem;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #0f3b5e;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.4rem;
            border-bottom: 2px solid #e2e8f0;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: #1e4a6b;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2c5f7a;
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            color: #334155;
        }
        strong {
            color: #0f3b5e;
            font-weight: 700;
        }
        .highlight {
            background: #fef3c7;
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
        }
        .emoji-big {
            font-size: 1.8rem;
            margin-right: 0.3rem;
        }
        header {
            padding: 1.2rem 0 0.8rem;
            border-bottom: 2px solid #e2e8f0;
            margin-bottom: 1.5rem;
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #0a1e2b;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            text-decoration: none;
        }
        .my-logo span {
            background: #e67e22;
            color: #fff;
            padding: 0 0.6rem;
            border-radius: 6px;
            font-size: 1.2rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #e67e22;
        }
        .my-logo i {
            color: #e67e22;
            font-size: 1.8rem;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 0.2rem;
            flex-wrap: wrap;
            padding: 0;
            margin: 0;
        }
        .nav-links li a {
            padding: 0.5rem 1rem;
            border-radius: 8px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #1e293b;
            transition: background 0.2s, color 0.2s;
            display: block;
        }
        .nav-links li a:hover {
            background: #e2e8f0;
            color: #0f3b5e;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #0a1e2b;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e2e8f0;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.6rem 0;
            margin: 0.5rem 0 1rem;
            font-size: 0.9rem;
            color: #64748b;
            gap: 0.3rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 0.5rem;
            color: #94a3b8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #0f3b5e;
        }
        .breadcrumb a:hover {
            color: #e67e22;
        }
        .breadcrumb .active {
            color: #64748b;
            font-weight: 500;
        }
        main {
            padding: 1rem 0 2rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        @media (min-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr 320px;
            }
        }
        .article-body {
            background: #fff;
            padding: 2rem 2rem 2.5rem;
            border-radius: 16px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
        }
        .article-body img {
            margin: 1.5rem 0;
            width: 100%;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        .article-body .img-caption {
            font-size: 0.85rem;
            color: #64748b;
            text-align: center;
            margin-top: -0.8rem;
            margin-bottom: 1.8rem;
            font-style: italic;
        }
        .last-updated {
            font-size: 0.9rem;
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
            padding: 0.5rem 1rem;
            background: #f1f5f9;
            border-radius: 8px;
            width: fit-content;
        }
        .last-updated i {
            color: #e67e22;
        }
        .sidebar {
            background: #fff;
            padding: 1.5rem 1.5rem 2rem;
            border-radius: 16px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
            height: fit-content;
            position: sticky;
            top: 1rem;
        }
        .sidebar h3 {
            font-size: 1.1rem;
            margin-top: 0;
            margin-bottom: 1rem;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.6rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar ul li {
            margin-bottom: 0.4rem;
        }
        .sidebar ul li a {
            display: block;
            padding: 0.4rem 0.6rem;
            border-radius: 6px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        .sidebar ul li a:hover {
            background: #f1f5f9;
            text-decoration: none;
        }
        .search-box {
            display: flex;
            margin-bottom: 2rem;
            border-radius: 10px;
            overflow: hidden;
            border: 2px solid #e2e8f0;
            transition: border-color 0.2s;
            background: #fff;
        }
        .search-box:focus-within {
            border-color: #e67e22;
        }
        .search-box input {
            flex: 1;
            padding: 0.8rem 1.2rem;
            border: none;
            outline: none;
            font-size: 1rem;
            background: transparent;
            min-width: 0;
        }
        .search-box button {
            padding: 0.8rem 1.4rem;
            background: #0f3b5e;
            color: #fff;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-box button:hover {
            background: #e67e22;
        }
        .comment-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e2e8f0;
        }
        .comment-section h3 {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin: 1.2rem 0 2rem;
        }
        .comment-form input,
        .comment-form textarea {
            padding: 0.8rem 1.2rem;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.2s;
            background: #fff;
        }
        .comment-form input:focus,
        .comment-form textarea:focus {
            outline: none;
            border-color: #e67e22;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .comment-form button {
            align-self: flex-start;
            padding: 0.7rem 2rem;
            background: #0f3b5e;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .comment-form button:hover {
            background: #e67e22;
        }
        .comment-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1rem;
        }
        .comment-item {
            padding: 1rem 1.2rem;
            background: #f8fafc;
            border-radius: 10px;
            border-left: 4px solid #e67e22;
        }
        .comment-item .author {
            font-weight: 700;
            color: #0f3b5e;
        }
        .comment-item .time {
            font-size: 0.8rem;
            color: #94a3b8;
            margin-left: 1rem;
        }
        .comment-item .text {
            margin-top: 0.4rem;
            color: #334155;
        }
        .rating-section {
            margin-top: 2rem;
            padding: 1.5rem;
            background: #f1f5f9;
            border-radius: 12px;
        }
        .rating-section h4 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            cursor: pointer;
            color: #d1d5db;
            transition: color 0.15s;
        }
        .stars i.active {
            color: #e67e22;
        }
        .stars i:hover,
        .stars i.hover {
            color: #f39c12;
        }
        .rating-result {
            margin-top: 0.8rem;
            font-weight: 600;
            color: #0f3b5e;
        }
        footer {
            border-top: 2px solid #e2e8f0;
            padding: 2rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        friend-link {
            display: block;
            padding: 1rem 0;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1rem 0.2rem 0;
            padding: 0.3rem 0.8rem;
            background: #f1f5f9;
            border-radius: 6px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: #e2e8f0;
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 1.2rem;
            font-size: 0.85rem;
            color: #94a3b8;
            border-top: 1px solid #e2e8f0;
            margin-top: 1rem;
        }
        .copyright strong {
            color: #64748b;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 0.8rem;
            }
            h1 {
                font-size: 1.8rem;
                padding-left: 0.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .article-body {
                padding: 1.2rem 1rem 1.8rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .my-logo span {
                font-size: 0.9rem;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                border-radius: 12px;
                box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
                padding: 0.5rem 0;
                position: absolute;
                top: 100%;
                left: 0;
                z-index: 100;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                padding: 0.7rem 1.2rem;
                border-radius: 0;
            }
            .hamburger {
                display: block;
            }
            .nav-wrapper {
                position: relative;
            }
            .header-top {
                position: relative;
            }
            .sidebar {
                position: static;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (min-width: 769px) {
            .nav-links {
                display: flex !important;
            }
            .hamburger {
                display: none;
            }
        }
        .text-muted {
            color: #94a3b8;
        }
        .mt-2 {
            margin-top: 1.5rem;
        }
        .mb-1 {
            margin-bottom: 0.8rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #0f3b5e;
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8fafc;
        }
        blockquote {
            border-left: 4px solid #e67e22;
            padding: 0.8rem 1.2rem;
            margin: 1.5rem 0;
            background: #fef9ef;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #1e293b;
        }
        blockquote cite {
            display: block;
            margin-top: 0.5rem;
            font-size: 0.85rem;
            color: #64748b;
            font-style: normal;
        }
        .toc {
            background: #f1f5f9;
            padding: 1.2rem 1.5rem;
            border-radius: 12px;
            margin: 1.5rem 0;
        }
        .toc ol {
            margin: 0.5rem 0 0;
            padding-left: 1.2rem;
        }
        .toc ol li {
            margin-bottom: 0.3rem;
        }
        .toc ol li a {
            font-size: 0.95rem;
        }
        .comment-item {
            animation: fadeIn 0.3s ease;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }