*,
        *::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: #f4f7fb;
            color: #1a2639;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #1e6f9f;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0a3b5c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(145deg, #0f2b3d, #1a4a6b);
            color: #fff;
            padding: 16px 0;
            border-bottom: 4px solid #f9c74f;
            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: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #f9c74f;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            transition: transform 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #f9c74f;
        }
        .my-logo i {
            font-size: 2rem;
            color: #fff;
        }
        .my-logo span {
            font-weight: 300;
            color: #cbd5e1;
            font-size: 0.9rem;
            display: block;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            gap: 8px 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        .main-nav a:hover {
            background: rgba(249, 199, 79, 0.2);
            color: #f9c74f;
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .breadcrumb {
            background: #fff;
            padding: 10px 0;
            border-bottom: 1px solid #e2e8f0;
            font-size: 0.85rem;
            color: #475569;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 12px;
            color: #94a3b8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #1e6f9f;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #1a2639;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #0f2b3d 0%, #1a4a6b 100%);
            color: #fff;
            padding: 48px 0 40px;
            text-align: center;
            border-bottom: 6px solid #f9c74f;
        }
        .hero h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .hero h1 i {
            color: #f9c74f;
            margin-right: 12px;
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 720px;
            margin: 0 auto 20px;
            color: #cbd5e1;
        }
        .hero .meta {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 0.95rem;
            color: #94a3b8;
        }
        .hero .meta i {
            margin-right: 6px;
            color: #f9c74f;
        }
        .hero .update-badge {
            background: #f9c74f;
            color: #1a2639;
            padding: 4px 16px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.85rem;
            display: inline-block;
            margin-top: 8px;
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-top: 48px;
            margin-bottom: 16px;
            color: #0f2b3d;
            border-left: 6px solid #f9c74f;
            padding-left: 18px;
        }
        .article-body h2 i {
            color: #f9c74f;
            margin-right: 10px;
        }
        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            color: #1a4a6b;
        }
        .article-body h3 i {
            margin-right: 8px;
            color: #1e6f9f;
        }
        .article-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 8px;
            color: #2d5a7a;
        }
        .article-body p {
            margin-bottom: 16px;
            color: #2d3748;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 6px;
        }
        .article-body .highlight-box {
            background: #eef6ff;
            border-left: 6px solid #1e6f9f;
            padding: 20px 24px;
            border-radius: 8px;
            margin: 24px 0;
        }
        .article-body .highlight-box strong {
            color: #0f2b3d;
        }
        .article-body .code-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 12px;
            margin: 20px 0;
        }
        .article-body .code-item {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 10px;
            padding: 14px 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
            transition: transform 0.15s, box-shadow 0.15s;
        }
        .article-body .code-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
        }
        .article-body .code-item .code {
            font-family: 'Courier New', monospace;
            font-weight: 700;
            color: #1e6f9f;
            background: #f0f7ff;
            padding: 2px 10px;
            border-radius: 4px;
        }
        .article-body .code-item .reward {
            font-size: 0.85rem;
            color: #475569;
        }
        .article-body .code-item .status {
            font-size: 0.75rem;
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 600;
        }
        .status.active {
            background: #d1fae5;
            color: #065f46;
        }
        .status.expired {
            background: #fee2e2;
            color: #991b1b;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 0.95rem;
        }
        .article-body th {
            background: #0f2b3d;
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .article-body td {
            padding: 12px 16px;
            border-bottom: 1px solid #e2e8f0;
            background: #fff;
        }
        .article-body tr:hover td {
            background: #f8fafc;
        }
        .featured-image {
            margin: 32px 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
        }
        .featured-image figcaption {
            background: #fff;
            padding: 12px 18px;
            font-size: 0.85rem;
            color: #475569;
            border-top: 1px solid #e2e8f0;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 14px;
            padding: 24px 20px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            margin-bottom: 24px;
            border: 1px solid #eef2f6;
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #0f2b3d;
            margin-bottom: 14px;
            border-bottom: 2px solid #f9c74f;
            padding-bottom: 8px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            margin-bottom: 10px;
        }
        .sidebar-card a {
            color: #1e6f9f;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card a:hover {
            color: #0a3b5c;
        }
        .sidebar-card a i {
            color: #f9c74f;
            font-size: 0.8rem;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 16px 0;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.2s;
            outline: none;
        }
        .search-form input:focus {
            border-color: #1e6f9f;
        }
        .search-form button {
            background: #1e6f9f;
            color: #fff;
            border: none;
            padding: 12px 20px;
            border-radius: 8px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-form button:hover {
            background: #0a3b5c;
        }
        .feedback-section {
            background: #fff;
            border-radius: 16px;
            padding: 32px 28px;
            margin-top: 48px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #eef2f6;
        }
        .feedback-section h2 {
            margin-top: 0 !important;
            border-left-color: #f9c74f !important;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            cursor: pointer;
            margin: 12px 0 20px;
            color: #d1d5db;
            transition: color 0.15s;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f9c74f;
        }
        .comment-form textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            min-height: 120px;
            resize: vertical;
            transition: border-color 0.2s;
            outline: none;
        }
        .comment-form textarea:focus {
            border-color: #1e6f9f;
        }
        .comment-form .form-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin: 12px 0;
        }
        .comment-form .form-row input {
            flex: 1;
            min-width: 180px;
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s;
        }
        .comment-form .form-row input:focus {
            border-color: #1e6f9f;
        }
        .comment-form .btn-submit {
            background: #1e6f9f;
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .comment-form .btn-submit:hover {
            background: #0a3b5c;
            transform: translateY(-1px);
        }
        .comment-form .btn-submit:active {
            transform: translateY(0);
        }
        .site-footer {
            background: #0f2b3d;
            color: #cbd5e1;
            padding: 40px 0 20px;
            border-top: 4px solid #f9c74f;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        @media(max-width:768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-col h4 {
            color: #f9c74f;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .footer-col p {
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .footer-col a {
            color: #94a3b8;
            display: block;
            margin-bottom: 6px;
            font-size: 0.9rem;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #f9c74f;
            text-decoration: none;
        }
        .footer-col i {
            margin-right: 8px;
            color: #f9c74f;
        }
        friend-link {
            display: block;
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        friend-link a {
            display: inline-block;
            margin-right: 16px;
            margin-bottom: 6px;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
        }
        .copyright strong {
            color: #94a3b8;
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 10px 14px;
                border-radius: 6px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .content-grid {
                gap: 24px;
            }
            .article-body h2 {
                font-size: 1.5rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-8 {
            gap: 8px;
        }
        .btn-submit,
        .search-form button,
        .nav-toggle,
        .main-nav a,
        .code-item,
        .sidebar-card a {
            transition: all 0.2s ease;
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #eef2f6;
        }
        ::-webkit-scrollbar-thumb {
            background: #94a3b8;
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #64748b;
        }