*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: #1a1a2e;
            background: #f8f9fc;
            padding: 0 16px;
            max-width: 1200px;
            margin: 0 auto;
        }
        a {
            color: #0056b3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ff6b35;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
            font-weight: 700;
            color: #0d1b2a;
        }
        h1 {
            font-size: 2.2rem;
            border-bottom: 4px solid #ff6b35;
            padding-bottom: 0.4rem;
            margin-top: 1rem;
        }
        h2 {
            font-size: 1.7rem;
            border-left: 5px solid #ff6b35;
            padding-left: 0.8rem;
        }
        h3 {
            font-size: 1.35rem;
            color: #1b3a5c;
        }
        h4 {
            font-size: 1.1rem;
            color: #2d4a6e;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            padding: 24px 28px;
            margin: 20px 0 30px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 16px 14px;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            body {
                padding: 0 8px;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0 10px;
            border-bottom: 2px solid #e9ecef;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #ff6b35, #f7931e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            text-decoration: none !important;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none !important;
        }
        .my-logo small {
            font-size: 0.65rem;
            display: block;
            -webkit-text-fill-color: #555;
            color: #555;
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1a1a2e;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #f0f0f5;
        }
        .primary-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 18px;
            align-items: center;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .primary-nav li a {
            font-weight: 500;
            padding: 6px 6px;
            border-radius: 6px;
            font-size: 0.95rem;
            color: #1a1a2e;
        }
        .primary-nav li a:hover {
            background: #fff0e6;
            color: #ff6b35;
            text-decoration: none;
        }
        @media (max-width: 720px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                padding: 12px 0 8px;
                gap: 2px;
                border-top: 1px solid #eee;
                margin-top: 10px;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav li a {
                display: block;
                padding: 10px 12px;
                font-size: 1rem;
                border-radius: 8px;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 10px 0 6px;
            margin: 0 0 6px;
            font-size: 0.85rem;
            color: #6c757d;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 8px;
            color: #aaa;
        }
        .breadcrumb a {
            color: #0056b3;
        }
        .breadcrumb a:hover {
            color: #ff6b35;
        }
        .search-section {
            background: #f0f4ff;
            border-radius: 16px;
            padding: 20px 24px;
            margin: 18px 0 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: center;
        }
        .search-section form {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            width: 100%;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-section input[type="text"] {
            flex: 1 1 200px;
            padding: 12px 18px;
            border: 2px solid #d0d7e6;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border 0.25s;
            background: #fff;
        }
        .search-section input[type="text"]:focus {
            border-color: #ff6b35;
        }
        .search-section button {
            padding: 12px 28px;
            background: #ff6b35;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-section button:hover {
            background: #e55a2b;
            transform: scale(1.02);
        }
        .search-section button i {
            font-size: 1.1rem;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 30px 0 20px;
        }
        @media (max-width: 640px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #f8faff;
            border: 1px solid #e6ecf5;
            border-radius: 16px;
            padding: 20px 22px;
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 10px;
        }
        .feedback-card textarea,
        .feedback-card input[type="text"],
        .feedback-card input[type="number"] {
            padding: 10px 14px;
            border: 2px solid #d0d7e6;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: border 0.25s;
            background: #fff;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: #ff6b35;
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card button {
            align-self: flex-start;
            padding: 10px 28px;
            background: #0d1b2a;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            font-size: 0.95rem;
        }
        .feedback-card button:hover {
            background: #ff6b35;
            transform: scale(1.02);
        }
        .score-stars {
            display: flex;
            gap: 4px;
            font-size: 1.6rem;
            color: #ffb800;
            cursor: pointer;
        }
        .score-stars i {
            transition: transform 0.15s;
        }
        .score-stars i:hover {
            transform: scale(1.25);
        }
        .site-footer {
            border-top: 2px solid #e9ecef;
            padding: 28px 0 20px;
            margin-top: 30px;
            text-align: center;
            font-size: 0.9rem;
            color: #4a5568;
        }
        .site-footer friend-link {
            display: block;
            margin: 12px 0 16px;
            font-weight: 500;
        }
        .site-footer friend-link a {
            margin: 0 8px;
            color: #0056b3;
        }
        .site-footer friend-link a:hover {
            color: #ff6b35;
        }
        .site-footer .copyright {
            font-size: 0.82rem;
            color: #6c757d;
            border-top: 1px solid #eee;
            padding-top: 16px;
            margin-top: 12px;
        }
        .badge {
            display: inline-block;
            background: #ff6b35;
            color: #fff;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .highlight-box {
            background: #fdf6f0;
            border-left: 5px solid #ff6b35;
            padding: 16px 20px;
            border-radius: 12px;
            margin: 20px 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 18px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 10px 14px;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #f0f4ff;
            font-weight: 700;
        }
        .emoji-big {
            font-size: 1.8rem;
            line-height: 1;
        }
        .last-update {
            display: inline-block;
            background: #edf2f7;
            padding: 2px 16px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #2d3748;
            margin-bottom: 12px;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            margin: 20px 0;
        }
        .feature-item {
            background: #f8faff;
            border-radius: 14px;
            padding: 18px 16px;
            text-align: center;
            border: 1px solid #e6ecf5;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06);
        }
        .feature-item i {
            font-size: 2rem;
            color: #ff6b35;
            margin-bottom: 8px;
        }
        .feature-item h4 {
            margin: 4px 0 6px;
        }
        .img-wrapper {
            margin: 24px 0;
            border-radius: 16px;
            overflow: hidden;
            background: #f0f2f6;
        }
        .img-wrapper img {
            width: 100%;
            height: auto;
            display: block;
        }
        .img-caption {
            font-size: 0.85rem;
            color: #4a5568;
            padding: 8px 14px 12px;
            background: #f8f9fc;
            text-align: center;
        }
        .toc {
            background: #f8faff;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            padding: 18px 22px;
            margin: 20px 0 28px;
        }
        .toc summary {
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            color: #0d1b2a;
        }
        .toc ol {
            margin-top: 12px;
            margin-bottom: 0;
            columns: 1;
        }
        .toc ol li {
            margin-bottom: 4px;
        }
        .toc ol li a {
            color: #1a1a2e;
        }
        .toc ol li a:hover {
            color: #ff6b35;
        }
        @media (min-width: 600px) {
            .toc ol {
                columns: 2;
                column-gap: 30px;
            }
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 8px;
            background: #ff6b35;
            color: #fff;
            padding: 8px 18px;
            border-radius: 0 0 8px 8px;
            z-index: 100;
            font-weight: 600;
        }
        .skip-link:focus {
            top: 0;
        }