* {
            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, BlinkMacSystemFont, sans-serif;
            background: #f0f7fb;
            color: #1a2a3a;
            line-height: 1.8;
            padding: 0;
        }
        a {
            color: #0066aa;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #003f6b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0b2a3e, #1a4a6e);
            color: #fff;
            padding: 18px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(to right, #f9d976, #f39c12);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 10px rgba(243, 156, 18, 0.3);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            font-size: 2rem;
            -webkit-text-fill-color: #f9d976;
            color: #f9d976;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
            -webkit-text-fill-color: inherit;
        }
        .my-logo a:hover {
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #fff;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        nav {
            display: flex;
            gap: 6px 18px;
            flex-wrap: wrap;
            align-items: center;
        }
        nav a {
            color: #e6f0fa;
            font-weight: 500;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        nav a:hover {
            color: #f9d976;
            border-bottom-color: #f9d976;
            text-decoration: none;
        }
        .nav-active {
            color: #f9d976 !important;
            border-bottom-color: #f9d976 !important;
        }
        .breadcrumb {
            background: #e2edf5;
            padding: 12px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #cbdae6;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #6a7f8f;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #0066aa;
        }
        .breadcrumb .current {
            color: #1a2a3a;
            font-weight: 600;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 920px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.6rem;
            line-height: 1.2;
            margin-bottom: 10px;
            color: #0b2a3e;
        }
        .article-body h1 i {
            color: #f39c12;
            margin-right: 10px;
        }
        .article-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 30px;
            font-size: 0.95rem;
            color: #4a6a7a;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 2px dashed #cbdae6;
        }
        .article-body .meta i {
            margin-right: 6px;
            color: #f39c12;
        }
        .article-body h2 {
            font-size: 2rem;
            margin-top: 48px;
            margin-bottom: 16px;
            color: #0b2a3e;
            border-left: 6px solid #f39c12;
            padding-left: 18px;
        }
        .article-body h3 {
            font-size: 1.5rem;
            margin-top: 32px;
            margin-bottom: 12px;
            color: #1a4a6e;
        }
        .article-body h4 {
            font-size: 1.2rem;
            margin-top: 24px;
            margin-bottom: 8px;
            color: #2a5a7a;
        }
        .article-body p {
            margin-bottom: 18px;
            font-size: 1.05rem;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 28px;
        }
        .article-body li {
            margin-bottom: 8px;
            font-size: 1.05rem;
        }
        .article-body .highlight-box {
            background: #e6f3fa;
            border-left: 6px solid #1a4a6e;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .article-body .highlight-box.success {
            border-left-color: #27ae60;
            background: #e8f8ee;
        }
        .article-body .highlight-box.warn {
            border-left-color: #e67e22;
            background: #fdf2e9;
        }
        .article-body .code-list {
            background: #fafafa;
            border-radius: 12px;
            padding: 18px 22px;
            font-family: 'Courier New', monospace;
            border: 1px solid #dde6ed;
            margin: 16px 0;
            display: inline-block;
        }
        .article-body .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
            border-radius: 12px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            font-size: 0.98rem;
        }
        .article-body th {
            background: #0b2a3e;
            color: #fff;
            padding: 14px 16px;
            text-align: left;
            font-weight: 600;
        }
        .article-body td {
            padding: 12px 16px;
            border-bottom: 1px solid #e2edf5;
        }
        .article-body tr:last-child td {
            border-bottom: none;
        }
        .article-body tr:hover td {
            background: #f4f9fd;
        }
        .article-body .img-wrap {
            margin: 30px 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .article-body .img-wrap figcaption {
            background: #f4f9fd;
            padding: 12px 18px;
            font-size: 0.9rem;
            color: #3a5a6a;
            text-align: center;
            font-style: italic;
        }
        .article-body blockquote {
            background: #f4f9fd;
            border-left: 6px solid #f39c12;
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #2a4a5a;
        }
        .article-body blockquote footer {
            margin-top: 8px;
            font-weight: 600;
            color: #0b2a3e;
            font-style: normal;
        }
        .sidebar {
            background: #fff;
            border-radius: 16px;
            padding: 24px 20px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 100px;
            height: fit-content;
            max-height: calc(100vh - 120px);
            overflow-y: auto;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            margin-bottom: 16px;
            color: #0b2a3e;
            border-bottom: 2px solid #f39c12;
            padding-bottom: 8px;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar li {
            margin-bottom: 10px;
        }
        .sidebar li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            border-radius: 8px;
            background: #f8fafc;
            transition: background 0.2s, transform 0.15s;
            font-size: 0.95rem;
        }
        .sidebar li a:hover {
            background: #e2edf5;
            transform: translateX(4px);
            text-decoration: none;
        }
        .sidebar li a i {
            color: #f39c12;
            width: 20px;
            text-align: center;
        }
        .search-section {
            background: #fff;
            border-radius: 16px;
            padding: 28px 24px;
            margin: 40px 0 20px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .search-section h3 {
            font-size: 1.4rem;
            margin-bottom: 16px;
            color: #0b2a3e;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border: 2px solid #dde6ed;
            border-radius: 12px;
            font-size: 1rem;
            transition: border-color 0.2s;
            outline: none;
            background: #fafcfe;
        }
        .search-form input[type="text"]:focus {
            border-color: #1a4a6e;
        }
        .search-form button {
            padding: 14px 32px;
            background: #0b2a3e;
            color: #fff;
            border: none;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #1a4a6e;
            transform: scale(1.02);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 40px 0;
        }
        @media (max-width: 700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: #fff;
            border-radius: 16px;
            padding: 28px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .card h3 {
            font-size: 1.3rem;
            margin-bottom: 16px;
            color: #0b2a3e;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .card h3 i {
            color: #f39c12;
        }
        .card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .card form input,
        .card form textarea,
        .card form select {
            padding: 12px 16px;
            border: 2px solid #dde6ed;
            border-radius: 10px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s;
            background: #fafcfe;
            font-family: inherit;
        }
        .card form input:focus,
        .card form textarea:focus,
        .card form select:focus {
            border-color: #1a4a6e;
        }
        .card form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .card form button {
            padding: 14px 24px;
            background: #f39c12;
            color: #fff;
            border: none;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
        }
        .card form button:hover {
            background: #d68910;
            transform: scale(1.02);
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #e0e7ed;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            transition: color 0.2s, transform 0.15s;
            cursor: pointer;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: #f39c12;
            transform: scale(1.1);
        }
        footer {
            background: #0b2a3e;
            color: #d6e3ed;
            padding: 48px 0 28px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        @media (max-width: 720px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        footer h4 {
            color: #f9d976;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        footer a {
            color: #b0cfec;
        }
        footer a:hover {
            color: #f9d976;
        }
        friend-link {
            display: block;
            padding: 18px 0;
            border-top: 1px solid #1a4a6e;
            margin-top: 18px;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
            padding: 4px 0;
            font-size: 0.95rem;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #1a4a6e;
            font-size: 0.9rem;
            color: #8aabbf;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 16px;
                gap: 6px;
            }
            nav.show {
                display: flex;
            }
            nav a {
                padding: 10px 12px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                width: 100%;
            }
            .header-inner {
                align-items: center;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.5rem;
            }
            .article-body h3 {
                font-size: 1.25rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .article-body h1 {
                font-size: 1.5rem;
            }
            .article-body p,
            .article-body li {
                font-size: 0.98rem;
            }
            .sidebar {
                position: static;
                max-height: none;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .gap-8 {
            gap: 8px;
        }