*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #004e92;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ff7b00;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            color: #0d1b2a;
            margin-top: 1.2em;
            margin-bottom: 0.5em;
        }
        h1 {
            font-size: 2.2rem;
            border-bottom: 4px solid #ff7b00;
            padding-bottom: 0.3em;
            display: inline-block;
        }
        h2 {
            font-size: 1.7rem;
            border-left: 5px solid #004e92;
            padding-left: 0.7rem;
        }
        h3 {
            font-size: 1.3rem;
            color: #1b3a5c;
        }
        h4 {
            font-size: 1.1rem;
            color: #2d4a6e;
        }
        p {
            margin: 0.9rem 0;
            text-align: justify;
        }
        strong {
            color: #c44536;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
            padding: 20px 28px 40px;
            margin-top: 20px;
            margin-bottom: 20px;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0 12px;
            border-bottom: 2px solid #e8ecf1;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #004e92, #ff7b00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: #ff7b00;
            font-size: 1.8rem;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #004e92;
            border-radius: 8px;
            padding: 6px 12px;
            font-size: 1.5rem;
            color: #004e92;
            cursor: pointer;
            transition: all 0.2s;
        }
        .nav-toggle:hover {
            background: #004e92;
            color: #fff;
        }
        .main-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 18px;
            align-items: center;
            transition: all 0.3s;
        }
        .main-nav a {
            font-weight: 500;
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
            font-size: 0.95rem;
        }
        .main-nav a:hover {
            border-bottom-color: #ff7b00;
            text-decoration: none;
        }
        .main-nav .active {
            border-bottom-color: #004e92;
            color: #004e92;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 10px 0 6px;
            gap: 6px 10px;
            font-size: 0.85rem;
            color: #5a6a7a;
            background: #f0f3f8;
            border-radius: 10px;
            padding: 8px 16px;
            margin: 12px 0 8px;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #aaa;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #004e92;
        }
        .breadcrumb .current {
            color: #7a4a1a;
            font-weight: 600;
        }
        .search-section {
            background: #eef3f9;
            border-radius: 16px;
            padding: 20px 24px;
            margin: 20px 0 28px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
        }
        .search-section label {
            font-weight: 700;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            gap: 8px;
            color: #0d1b2a;
        }
        .search-form {
            display: flex;
            flex: 1 1 300px;
            gap: 8px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1 1 200px;
            padding: 10px 16px;
            border: 2px solid #ccd7e4;
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: 0.25s;
            background: #fff;
        }
        .search-form input:focus {
            border-color: #004e92;
            box-shadow: 0 0 0 3px rgba(0, 78, 146, 0.15);
        }
        .search-form button {
            background: #004e92;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 10px 24px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.95rem;
        }
        .search-form button:hover {
            background: #003166;
            transform: scale(1.02);
        }
        .feature-image {
            margin: 28px 0 32px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .feature-image img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
        }
        .feature-image figcaption {
            background: #f8faff;
            padding: 10px 18px;
            font-size: 0.85rem;
            color: #4a5a6a;
            border-top: 1px solid #e0e6ef;
        }
        .code-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0 28px;
            font-size: 0.92rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
        }
        .code-table thead {
            background: #0d1b2a;
            color: #fff;
        }
        .code-table th {
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .code-table td {
            padding: 11px 16px;
            border-bottom: 1px solid #e2e8f0;
            background: #fff;
        }
        .code-table tbody tr:hover td {
            background: #f6f9ff;
        }
        .code-table .status-active {
            color: #1e7e34;
            font-weight: 600;
        }
        .code-table .status-expired {
            color: #b02a37;
            font-weight: 600;
        }
        .code-table .badge {
            background: #ff7b00;
            color: #fff;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
        }
        .rating-section {
            background: #f8faff;
            border-radius: 16px;
            padding: 20px 24px;
            margin: 28px 0;
            border: 1px solid #dde5f0;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 2rem;
            color: #ccc;
            cursor: pointer;
            transition: 0.15s;
            flex-wrap: wrap;
        }
        .rating-stars i {
            transition: 0.15s;
        }
        .rating-stars i:hover,
        .rating-stars i.hover {
            color: #ffb300;
            transform: scale(1.12);
        }
        .rating-stars i.selected {
            color: #ffb300;
        }
        .rating-form {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            margin-top: 12px;
        }
        .rating-form button {
            background: #ff7b00;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 8px 22px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
        }
        .rating-form button:hover {
            background: #e06a00;
            transform: scale(1.03);
        }
        .comment-section {
            margin: 30px 0 20px;
            background: #fafcff;
            border-radius: 16px;
            padding: 20px 24px;
            border: 1px solid #e2eaf5;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 12px;
        }
        .comment-form input,
        .comment-form textarea {
            padding: 10px 16px;
            border: 2px solid #d0dcec;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: 0.25s;
            background: #fff;
        }
        .comment-form input:focus,
        .comment-form textarea:focus {
            border-color: #004e92;
            box-shadow: 0 0 0 3px rgba(0, 78, 146, 0.12);
        }
        .comment-form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .comment-form button {
            align-self: flex-start;
            background: #004e92;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 10px 30px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
        }
        .comment-form button:hover {
            background: #003166;
            transform: scale(1.02);
        }
        .site-footer {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 2px solid #e2e8f0;
            font-size: 0.9rem;
            color: #3a4a5a;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            padding: 12px 0 16px;
        }
        .footer-links a {
            color: #004e92;
            font-weight: 500;
        }
        .footer-links a:hover {
            color: #ff7b00;
        }
        .copyright {
            text-align: center;
            padding: 14px 0 6px;
            border-top: 1px solid #e8ecf3;
            color: #5a6a7a;
            font-size: 0.82rem;
        }
        .copyright strong {
            color: #0d1b2a;
        }
        friend-link {
            display: block;
            padding: 10px 0 6px;
            font-style: normal;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 16px 4px 0;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 10px;
            }
            .container {
                padding: 14px 14px 28px;
                border-radius: 14px;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .nav-toggle {
                display: inline-block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 6px;
                padding: 12px 0 6px;
                border-top: 1px solid #ddd;
                margin-top: 10px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 6px 0;
                font-size: 0.95rem;
                border-bottom: 1px solid #edf0f5;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 6px 10px;
                gap: 4px 6px;
            }
            .search-section {
                padding: 16px 14px;
                flex-direction: column;
                align-items: stretch;
            }
            .search-form input {
                font-size: 0.9rem;
            }
            .code-table {
                font-size: 0.78rem;
            }
            .code-table th,
            .code-table td {
                padding: 8px 8px;
            }
            .rating-stars {
                font-size: 1.6rem;
            }
            .comment-section,
            .rating-section {
                padding: 16px 14px;
            }
            .footer-links {
                gap: 8px 14px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 10px 10px 24px;
            }
            h1 {
                font-size: 1.3rem;
            }
            h2 {
                font-size: 1.1rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .code-table {
                font-size: 0.7rem;
            }
            .code-table th,
            .code-table td {
                padding: 5px 5px;
            }
            .rating-stars {
                font-size: 1.3rem;
            }
        }
        .highlight-box {
            background: #f0f7ff;
            border-left: 5px solid #ff7b00;
            padding: 14px 20px;
            border-radius: 0 12px 12px 0;
            margin: 18px 0;
        }
        .tip-box {
            background: #e6f4ea;
            border-left: 5px solid #1e7e34;
            padding: 12px 18px;
            border-radius: 0 12px 12px 0;
            margin: 16px 0;
        }
        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 16px 0;
        }
        @media (max-width: 600px) {
            .two-col {
                grid-template-columns: 1fr;
            }
        }
        .emoji-lg {
            font-size: 1.4em;
            line-height: 1;
        }
        .tag {
            display: inline-block;
            background: #eef3f9;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #2a4a6a;
            margin: 2px 4px 2px 0;
        }
        .last-updated {
            color: #6a7a8a;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 6px 0 12px;
        }
        .section-icon {
            margin-right: 8px;
            color: #ff7b00;
        }
        .glossary-term {
            font-weight: 600;
            color: #004e92;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 16px 0;
        }
        :target {
            scroll-margin-top: 30px;
        }