*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f4f7fc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.25s, border-color 0.25s;
        }
        a:hover,
        a:focus {
            color: #1e40af;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.6rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: #0f172a;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 3px solid #2563eb;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.35rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1.1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: #0f172a;
            color: #f8fafc;
            padding: 0.6rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            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: 0.6rem 1rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #facc15;
            letter-spacing: -0.5px;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            color: #facc15;
            font-size: 2rem;
        }
        .my-logo:hover {
            color: #fde047;
            text-decoration: none;
        }
        .my-logo span {
            font-weight: 300;
            color: #94a3b8;
            font-size: 0.9rem;
            margin-left: 0.3rem;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .nav-list li a {
            color: #e2e8f0;
            padding: 0.45rem 0.9rem;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            display: block;
        }
        .nav-list li a:hover,
        .nav-list li a:focus {
            background: #2563eb;
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid #e2e8f0;
            color: #e2e8f0;
            font-size: 1.6rem;
            padding: 0.2rem 0.7rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #1e293b;
        }
        .nav-toggle {
            display: none;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 0.6rem 0;
            font-size: 0.92rem;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "/";
            color: #64748b;
            margin-right: 0.5rem;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 600;
        }
        .main-content {
            padding: 2.2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.4rem;
        }
        .article-body {
            background: #fff;
            padding: 2rem 2.2rem;
            border-radius: 20px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            background: #fff;
            padding: 1.8rem 1.5rem;
            border-radius: 20px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            align-self: start;
            position: sticky;
            top: 80px;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar ul li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.95rem;
        }
        .sidebar ul li a i {
            width: 1.2rem;
            color: #2563eb;
        }
        .feature-highlight {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.2rem;
            margin: 1.8rem 0;
        }
        .feature-card {
            background: #f0f4fe;
            padding: 1.2rem 1rem;
            border-radius: 14px;
            text-align: center;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px rgba(37, 99, 235, 0.08);
        }
        .feature-card i {
            font-size: 2.2rem;
            color: #2563eb;
            margin-bottom: 0.5rem;
        }
        .feature-card h4 {
            margin: 0.3rem 0 0.2rem;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: #475569;
            margin: 0;
        }
        .img-wrapper {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            background: #eef2f6;
            padding: 0.8rem;
            text-align: center;
        }
        .img-wrapper img {
            border-radius: 10px;
            width: 100%;
        }
        .img-wrapper figcaption {
            font-size: 0.85rem;
            color: #64748b;
            margin-top: 0.6rem;
            font-style: italic;
        }
        .search-form {
            display: flex;
            gap: 0.6rem;
            margin: 1.6rem 0;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #d1d9e6;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.25s;
        }
        .search-form input:focus {
            border-color: #2563eb;
        }
        .search-form button {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #1e40af;
            transform: scale(1.02);
        }
        .interaction-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.4rem 0 1.6rem;
            padding-top: 1.6rem;
            border-top: 2px dashed #d1d9e6;
        }
        .comment-box textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #d1d9e6;
            border-radius: 14px;
            font-size: 0.95rem;
            font-family: inherit;
            resize: vertical;
            min-height: 90px;
            transition: border-color 0.25s;
        }
        .comment-box textarea:focus {
            border-color: #2563eb;
            outline: none;
        }
        .comment-box input[type="text"] {
            width: 100%;
            padding: 0.6rem 1rem;
            border: 2px solid #d1d9e6;
            border-radius: 40px;
            font-size: 0.95rem;
            margin-bottom: 0.6rem;
        }
        .comment-box input:focus {
            border-color: #2563eb;
            outline: none;
        }
        .comment-box button,
        .score-box button {
            background: #0f172a;
            color: #fff;
            border: none;
            padding: 0.6rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .comment-box button:hover,
        .score-box button:hover {
            background: #1e293b;
            transform: scale(1.02);
        }
        .score-box .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #d1d9e6;
            cursor: pointer;
            margin: 0.4rem 0 0.8rem;
        }
        .score-box .star-rating i.active {
            color: #facc15;
        }
        .score-box .star-rating i:hover,
        .score-box .star-rating i.hover {
            color: #facc15;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.6rem 0;
            font-size: 0.95rem;
        }
        .data-table th {
            background: #0f172a;
            color: #f8fafc;
            padding: 0.7rem 1rem;
            text-align: left;
        }
        .data-table td {
            padding: 0.6rem 1rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .data-table tr:nth-child(even) {
            background: #f8fafc;
        }
        .data-table tr:hover td {
            background: #eef2f6;
        }
        friend-link {
            display: block;
            background: #eef2f6;
            padding: 1.2rem 1.6rem;
            border-radius: 16px;
            margin: 1.6rem 0 0.6rem;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.8rem 0.2rem 0;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 2rem 0 1.4rem;
            font-size: 0.92rem;
        }
        .site-footer .footer-inner {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .site-footer a {
            color: #93c5fd;
        }
        .site-footer a:hover {
            color: #facc15;
        }
        .copyright {
            border-top: 1px solid #1e293b;
            padding-top: 1rem;
            text-align: center;
            font-size: 0.88rem;
            color: #94a3b8;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .article-body {
                order: 1;
            }
            .interaction-area {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-wrapper .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0f172a;
                padding: 1rem 0.5rem;
                border-radius: 16px;
                margin-top: 0.6rem;
                gap: 0.2rem;
            }
            .nav-wrapper .nav-list li a {
                padding: 0.6rem 1rem;
                border-radius: 8px;
            }
            .hamburger {
                display: block;
            }
            .nav-toggle:checked~.nav-list {
                display: flex;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .article-body {
                padding: 1.2rem 1rem;
            }
            .feature-highlight {
                grid-template-columns: 1fr 1fr;
            }
            .data-table {
                font-size: 0.82rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.4rem 0.6rem;
            }
        }
        @media (max-width: 480px) {
            .feature-highlight {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo span {
                font-size: 0.75rem;
            }
        }
        .badge {
            display: inline-block;
            background: #2563eb;
            color: #fff;
            padding: 0.15rem 0.7rem;
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 600;
        }
        .blockquote {
            background: #f0f4fe;
            border-left: 5px solid #2563eb;
            padding: 1rem 1.4rem;
            border-radius: 0 14px 14px 0;
            margin: 1.4rem 0;
            font-style: italic;
        }
        .update-badge {
            color: #64748b;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-bottom: 1rem;
        }
        .toc {
            background: #f8fafc;
            padding: 1.2rem 1.6rem;
            border-radius: 14px;
            border: 1px solid #e2e8f0;
            margin: 1.4rem 0;
        }
        .toc ol {
            margin: 0.4rem 0 0;
            padding-left: 1.4rem;
        }
        .toc ol li {
            margin: 0.2rem 0;
        }
        .btn-sm {
            padding: 0.3rem 1rem;
            border-radius: 40px;
            border: none;
            background: #e2e8f0;
            font-weight: 500;
            cursor: pointer;
            transition: background 0.2s;
        }
        .btn-sm:hover {
            background: #cbd5e1;
        }