*,
        *::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: #f4f7fc;
            color: #1a2639;
            line-height: 1.7;
            padding: 0 16px;
            max-width: 1280px;
            margin: 0 auto;
        }
        a {
            color: #1565c0;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #0d3b6b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.6rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0b1a2e;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4rem;
            border-left: 6px solid #f5a623;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.9rem;
            border-bottom: 2px solid #e0e7ef;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.45rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
            color: #2c3e50;
        }
        strong {
            font-weight: 700;
            color: #0b1a2e;
        }
        em {
            font-style: italic;
        }
        hr {
            border: none;
            border-top: 2px solid #dce3ed;
            margin: 2.4rem 0;
        }
        .container {
            background: #ffffff;
            border-radius: 24px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.05);
            padding: 20px 24px 32px;
            margin: 16px 0 32px;
        }
        @media (min-width: 768px) {
            body {
                padding: 0 32px;
            }
            .container {
                padding: 32px 48px 48px;
                margin: 24px 0 40px;
            }
        }
        header {
            padding: 18px 0 8px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #0b1a2e;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #f5a623, #e65100);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            text-decoration: none !important;
            transition: transform 0.2s ease;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none !important;
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #555;
            color: #555;
            display: block;
            font-weight: 400;
            letter-spacing: 0.2px;
        }
        .hamburger {
            display: flex;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px 10px;
            border-radius: 8px;
            background: #f0f4fa;
            border: none;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e3e9f2;
        }
        .hamburger span {
            display: block;
            width: 28px;
            height: 3px;
            background: #1a2639;
            border-radius: 4px;
            transition: 0.3s ease;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }
        nav#mainNav {
            width: 100%;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease, opacity 0.3s ease, margin 0.3s ease;
            opacity: 0;
            margin-top: 0;
            background: #ffffff;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        nav#mainNav.open {
            max-height: 900px;
            opacity: 1;
            margin-top: 16px;
            padding: 12px 8px;
        }
        nav#mainNav ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        nav#mainNav ul li a {
            display: block;
            padding: 10px 16px;
            border-radius: 10px;
            font-weight: 600;
            color: #1a2639;
            transition: background 0.2s, color 0.2s;
            text-decoration: none;
        }
        nav#mainNav ul li a:hover {
            background: #f0f4fa;
            color: #e65100;
            text-decoration: none;
        }
        @media (min-width: 768px) {
            .hamburger {
                display: none;
            }
            nav#mainNav {
                max-height: none !important;
                opacity: 1 !important;
                width: auto;
                background: transparent;
                box-shadow: none;
                margin-top: 0 !important;
                padding: 0 !important;
            }
            nav#mainNav ul {
                flex-direction: row;
                gap: 6px;
            }
            nav#mainNav ul li a {
                padding: 8px 18px;
                font-size: 0.95rem;
            }
            header {
                flex-wrap: nowrap;
                gap: 24px;
            }
        }
        .breadcrumb {
            font-size: 0.85rem;
            padding: 8px 0 4px;
            color: #5a6b7d;
            background: transparent;
            border-radius: 0;
            margin-bottom: 8px;
            display: flex;
            flex-wrap: wrap;
            gap: 4px 8px;
        }
        .breadcrumb a {
            color: #1565c0;
        }
        .breadcrumb a:hover {
            color: #0d3b6b;
        }
        .breadcrumb span {
            color: #7a8a9e;
        }
        .search-section {
            background: #f0f6fe;
            border-radius: 18px;
            padding: 20px 24px;
            margin: 20px 0 28px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
        }
        .search-section label {
            font-weight: 700;
            font-size: 1.1rem;
            color: #0b1a2e;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form {
            display: flex;
            flex: 1 1 280px;
            gap: 8px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 18px;
            border: 2px solid #dce3ed;
            border-radius: 40px;
            font-size: 1rem;
            background: #fff;
            outline: none;
            transition: border 0.25s;
        }
        .search-form input:focus {
            border-color: #f5a623;
        }
        .search-form button {
            padding: 12px 28px;
            background: linear-gradient(135deg, #f5a623, #e65100);
            border: none;
            border-radius: 40px;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            transform: scale(1.03);
            box-shadow: 0 6px 20px rgba(230, 81, 0, 0.3);
        }
        .code-box {
            background: #fafbfd;
            border: 2px dashed #d0d9e6;
            border-radius: 16px;
            padding: 16px 20px;
            margin: 14px 0 20px;
            display: inline-block;
            font-family: 'Courier New', monospace;
            font-size: 1.3rem;
            font-weight: 700;
            letter-spacing: 1px;
            color: #e65100;
            background: #fff7ed;
            transition: background 0.2s;
        }
        .code-box:hover {
            background: #ffefe0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0 28px;
            border-radius: 14px;
            border: 1px solid #e8edf4;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            min-width: 520px;
        }
        table th {
            background: #1a2a41;
            color: #fff;
            padding: 14px 16px;
            text-align: left;
            font-weight: 600;
        }
        table td {
            padding: 13px 16px;
            border-bottom: 1px solid #eef2f8;
        }
        table tr:nth-child(even) {
            background: #f8faff;
        }
        table tr:hover td {
            background: #f0f6fe;
        }
        .rating-section {
            background: #f8faff;
            border-radius: 18px;
            padding: 20px 24px;
            margin: 28px 0;
            border: 1px solid #e8edf4;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 2rem;
            cursor: pointer;
            color: #d0d7e2;
            transition: color 0.15s;
            flex-wrap: wrap;
        }
        .rating-stars i.active {
            color: #f5a623;
        }
        .rating-stars i:hover,
        .rating-stars i.hover {
            color: #f5a623;
        }
        .rating-result {
            font-weight: 700;
            margin-top: 6px;
            color: #2c3e50;
        }
        .comment-section {
            background: #f8faff;
            border-radius: 18px;
            padding: 20px 24px;
            margin: 28px 0;
            border: 1px solid #e8edf4;
        }
        .comment-list {
            max-height: 340px;
            overflow-y: auto;
            margin: 12px 0 16px;
            border-top: 1px solid #e8edf4;
            padding-top: 12px;
        }
        .comment-item {
            padding: 12px 0;
            border-bottom: 1px solid #eef2f8;
        }
        .comment-item strong {
            color: #0b1a2e;
        }
        .comment-item small {
            color: #7a8a9e;
            font-size: 0.8rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #dce3ed;
            border-radius: 14px;
            font-size: 1rem;
            resize: vertical;
            min-height: 80px;
            font-family: inherit;
            transition: border 0.25s;
            background: #fff;
        }
        .comment-form textarea:focus {
            border-color: #f5a623;
            outline: none;
        }
        .comment-form button {
            padding: 12px 32px;
            background: linear-gradient(135deg, #1565c0, #0d3b6b);
            border: none;
            border-radius: 40px;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            margin-top: 8px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .comment-form button:hover {
            transform: scale(1.02);
            box-shadow: 0 6px 20px rgba(21, 101, 192, 0.3);
        }
        .callout {
            background: #eef5ff;
            border-left: 6px solid #1565c0;
            border-radius: 0 14px 14px 0;
            padding: 18px 22px;
            margin: 20px 0;
        }
        .callout.orange {
            border-left-color: #f5a623;
            background: #fff8f0;
        }
        .callout.green {
            border-left-color: #2e7d32;
            background: #f1f9f1;
        }
        .callout p:last-child {
            margin-bottom: 0;
        }
        friend-link {
            display: block;
            background: #f0f4fa;
            border-radius: 16px;
            padding: 20px 24px;
            margin: 24px 0 8px;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
            padding: 4px 0;
            font-weight: 500;
        }
        footer {
            padding: 20px 0 28px;
            text-align: center;
            color: #5a6b7d;
            font-size: 0.9rem;
            border-top: 2px solid #e8edf4;
            margin-top: 20px;
        }
        footer p {
            margin-bottom: 0.5rem;
            color: #5a6b7d;
        }
        .badge {
            background: #f5a623;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 40px;
            display: inline-block;
            letter-spacing: 0.3px;
        }
        .badge.blue {
            background: #1565c0;
        }
        .badge.green {
            background: #2e7d32;
        }
        .update-time {
            font-size: 0.85rem;
            color: #7a8a9e;
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 4px 0 16px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            margin: 20px 0;
        }
        @media (min-width: 640px) {
            .grid-2 {
                grid-template-columns: 1fr 1fr;
            }
        }
        .stat-card {
            background: #f8faff;
            border-radius: 16px;
            padding: 18px 20px;
            border: 1px solid #e8edf4;
            text-align: center;
        }
        .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: #e65100;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: #5a6b7d;
        }
        .fa-spin-hover:hover i {
            animation: fa-spin 1.5s ease-in-out;
        }
        @keyframes fa-spin {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }
        .article-image {
            margin: 24px 0 18px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
        }
        .article-image figcaption {
            font-size: 0.85rem;
            color: #5a6b7d;
            text-align: center;
            padding: 8px 0 4px;
            font-style: italic;
        }
        .toc {
            background: #f8faff;
            border-radius: 16px;
            padding: 16px 22px;
            margin: 16px 0 24px;
            border: 1px solid #e8edf4;
        }
        .toc ul {
            list-style: none;
            padding: 0;
            margin: 8px 0 0;
        }
        .toc ul li {
            padding: 4px 0;
        }
        .toc ul li a {
            font-weight: 500;
        }
        .toc ul li a::before {
            content: "▸ ";
            color: #f5a623;
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .container {
                padding: 14px 14px 24px;
            }
            .search-section {
                padding: 14px 16px;
            }
            .rating-stars {
                font-size: 1.6rem;
            }
            .code-box {
                font-size: 1rem;
                padding: 12px 16px;
            }
        }