*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            background: #faf9f7;
            color: #1e1e1e;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #c7452b;
            text-decoration: underline;
            transition: color 0.2s;
        }
        a:hover {
            color: #8f2c1a;
            text-decoration: none;
        }
        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;
            color: #1a1a1a;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
            border-bottom: 4px solid #f5c842;
            display: inline-block;
            padding-bottom: 0.3rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 6px solid #f5c842;
            padding-left: 0.9rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #2d2d2d;
        }
        h4 {
            font-size: 1.15rem;
            color: #3d3d3d;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        strong {
            color: #c7452b;
        }
        em {
            font-style: italic;
            color: #555;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 0.5rem;
        }
        .site-header {
            background: #1e2a3a;
            color: #fff;
            padding: 0.8rem 1.5rem;
            border-radius: 0 0 20px 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
            margin-bottom: 1.2rem;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #f5c842;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            font-size: 2rem;
            color: #fff;
        }
        .my-logo:hover {
            color: #ffd966;
        }
        .my-logo small {
            font-size: 0.8rem;
            font-weight: 400;
            color: #ccc;
            display: block;
            line-height: 1;
        }
        .nav-menu {
            display: flex;
            gap: 1.2rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #f0f0f0;
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        .nav-menu a:hover {
            background: #f5c842;
            color: #1e2a3a;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
        }
        .nav-active {
            display: flex !important;
        }
        .breadcrumb {
            background: #f0ede8;
            padding: 0.6rem 1.2rem;
            border-radius: 30px;
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.8rem;
        }
        .breadcrumb a {
            color: #c7452b;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #666;
        }
        .search-block {
            background: #fff;
            border-radius: 40px;
            padding: 0.2rem 0.2rem 0.2rem 1.4rem;
            display: flex;
            max-width: 480px;
            margin: 1.5rem 0 2rem;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
            border: 1px solid #e0ddd8;
        }
        .search-block input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.7rem 0;
            font-size: 1rem;
            outline: none;
            color: #333;
        }
        .search-block button {
            background: #f5c842;
            border: none;
            border-radius: 40px;
            padding: 0.6rem 1.6rem;
            font-weight: 600;
            color: #1e2a3a;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .search-block button:hover {
            background: #e0b830;
        }
        .feedback-section {
            background: #ffffff;
            border-radius: 24px;
            padding: 2rem 1.8rem;
            margin: 3rem 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            border: 1px solid #efebe6;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
        }
        .feedback-card textarea,
        .feedback-card input {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #d9d4ce;
            border-radius: 14px;
            font-size: 1rem;
            font-family: inherit;
            background: #fcfbfa;
            transition: border 0.2s;
            margin-bottom: 0.8rem;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: #f5c842;
            outline: none;
            background: #fff;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .btn {
            background: #1e2a3a;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .feedback-card .btn:hover {
            background: #c7452b;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.3rem;
            margin-bottom: 0.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f5c842;
        }
        friend-link {
            display: block;
            background: #f0ede8;
            border-radius: 20px;
            padding: 1.6rem 1.8rem;
            margin: 2.5rem 0 1.2rem;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.3rem 1rem 0.3rem 0;
            padding: 0.2rem 0.8rem;
            background: #fff;
            border-radius: 30px;
            text-decoration: none;
            color: #1e2a3a;
            font-weight: 500;
            border: 1px solid #d9d4ce;
            transition: background 0.2s, border-color 0.2s;
        }
        friend-link a:hover {
            background: #f5c842;
            border-color: #f5c842;
        }
        friend-link::before {
            content: "🔗 Friends & Related";
            font-weight: 700;
            font-size: 1.1rem;
            display: block;
            margin-bottom: 0.7rem;
            color: #1e2a3a;
        }
        .site-footer {
            background: #1e2a3a;
            color: #ccc;
            padding: 2rem 1.5rem;
            border-radius: 24px 24px 0 0;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
        }
        .site-footer a {
            color: #f5c842;
        }
        .site-footer .copyright {
            margin-top: 1rem;
            border-top: 1px solid #3a4a5a;
            padding-top: 1rem;
            font-size: 0.85rem;
            color: #999;
        }
        .img-feature {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            background: #f0ede8;
            padding: 0.5rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
        }
        .img-feature figcaption {
            padding: 0.6rem 0.8rem;
            font-size: 0.9rem;
            color: #666;
            font-style: italic;
            text-align: center;
        }
        .toc {
            background: #f8f6f3;
            border-radius: 18px;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border-left: 4px solid #f5c842;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ul {
            list-style: none;
            padding: 0;
            columns: 2 280px;
            column-gap: 2rem;
        }
        .toc li {
            padding: 0.2rem 0;
            break-inside: avoid;
        }
        .toc a {
            text-decoration: none;
            color: #1e2a3a;
            font-weight: 500;
        }
        .toc a:hover {
            color: #c7452b;
            text-decoration: underline;
        }
        @media (max-width: 768px) {
            .site-header {
                padding: 0.6rem 1rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1e2a3a;
                padding: 0.8rem 0 1.2rem;
                border-radius: 0 0 16px 16px;
                gap: 0.3rem;
                margin-top: 0.6rem;
            }
            .nav-menu a {
                padding: 0.5rem 1rem;
                font-size: 1rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .search-block {
                max-width: 100%;
                flex-wrap: wrap;
                padding: 0.3rem;
            }
            .search-block input {
                min-width: 120px;
                padding: 0.5rem 0.8rem;
            }
            .search-block button {
                padding: 0.5rem 1.2rem;
                font-size: 0.85rem;
            }
            .toc ul {
                columns: 1;
            }
            .breadcrumb {
                font-size: 0.8rem;
                padding: 0.4rem 1rem;
            }
            .container {
                padding: 0 0.2rem;
            }
            body {
                padding: 0 0.6rem;
            }
        }
        @media (min-width: 769px) {
            .nav-menu {
                display: flex !important;
            }
            .hamburger {
                display: none !important;
            }
        }
        .highlight-box {
            background: #fdf8ee;
            border-radius: 16px;
            padding: 1.5rem 1.8rem;
            border-left: 6px solid #f5c842;
            margin: 1.8rem 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1.2rem;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.2rem;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
            border: 1px solid #efebe6;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #c7452b;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #777;
            margin-top: 0.2rem;
        }
        .schema-hidden {
            display: none;
        }