*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --sand: #c8a96e;
            --sand-light: #e8d5b0;
            --sand-dark: #a8884e;
            --dune-bg: #1a1a1a;
            --dune-bg2: #2a2a2a;
            --dune-text: #f0ede8;
            --dune-muted: #b0a898;
            --dune-accent: #d4b87a;
            --dune-border: #3a3a3a;
            --font-serif: 'Georgia', 'Times New Roman', serif;
            --font-sans: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            --radius: 8px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
            --transition: 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: var(--dune-bg);
            color: var(--dune-text);
            line-height: 1.7;
            padding: 0;
            margin: 0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: var(--sand);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: #f5e7c8;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-serif);
            font-weight: 600;
            line-height: 1.3;
            color: var(--sand-light);
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.6rem;
            margin-top: 0.5rem;
            border-bottom: 2px solid var(--sand-dark);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            border-left: 4px solid var(--sand);
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--dune-accent);
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.5rem 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        header {
            background: linear-gradient(135deg, #0d0d0d 0%, #1f1a12 100%);
            border-bottom: 2px solid var(--sand-dark);
            padding: 0.6rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(8px);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.7);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: var(--font-serif);
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--sand);
            letter-spacing: 2px;
            text-transform: uppercase;
            background: linear-gradient(135deg, #c8a96e, #f5e7c8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: opacity var(--transition);
            display: inline-block;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            letter-spacing: 1px;
            -webkit-text-fill-color: var(--dune-muted);
            color: var(--dune-muted);
            display: block;
            font-family: var(--font-sans);
            text-transform: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--sand-dark);
            color: var(--sand);
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 4px;
            cursor: pointer;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(200, 169, 110, 0.15);
        }
        nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        nav a {
            padding: 0.5rem 1rem;
            border-radius: 4px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--dune-muted);
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        nav a:hover,
        nav a.active {
            background: rgba(200, 169, 110, 0.12);
            color: var(--sand-light);
            text-decoration: none;
        }
        nav a i {
            margin-right: 0.3rem;
        }
        .breadcrumb {
            padding: 1rem 0 0.2rem;
            font-size: 0.9rem;
            color: var(--dune-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            list-style: none;
            margin: 0;
        }
        .breadcrumb li {
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.5rem;
            color: var(--sand-dark);
        }
        .breadcrumb a {
            color: var(--sand);
        }
        .breadcrumb .current {
            color: var(--dune-text);
        }
        .search-wrap {
            display: flex;
            max-width: 400px;
            margin: 0.8rem 0 1.2rem;
            border: 1px solid var(--dune-border);
            border-radius: 40px;
            overflow: hidden;
            background: var(--dune-bg2);
            transition: border-color var(--transition);
        }
        .search-wrap:focus-within {
            border-color: var(--sand);
        }
        .search-wrap input {
            flex: 1;
            padding: 0.7rem 1.2rem;
            border: none;
            background: transparent;
            color: var(--dune-text);
            font-size: 0.95rem;
            outline: none;
        }
        .search-wrap input::placeholder {
            color: var(--dune-muted);
            opacity: 0.7;
        }
        .search-wrap button {
            background: transparent;
            border: none;
            color: var(--sand);
            padding: 0 1.2rem;
            font-size: 1.2rem;
            cursor: pointer;
            transition: color var(--transition);
        }
        .search-wrap button:hover {
            color: #f5e7c8;
        }
        .hero-image {
            margin: 1.5rem 0 2rem;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
        }
        .hero-image img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
            border-radius: var(--radius);
        }
        .hero-caption {
            background: rgba(0, 0, 0, 0.7);
            padding: 0.8rem 1.2rem;
            font-size: 0.9rem;
            color: var(--sand-light);
            border-radius: 0 0 var(--radius) var(--radius);
            margin-top: -4px;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
        }
        .feedback-card {
            background: var(--dune-bg2);
            border: 1px solid var(--dune-border);
            border-radius: var(--radius);
            padding: 1.8rem 1.8rem 2rem;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .feedback-card:hover {
            border-color: var(--sand-dark);
            box-shadow: 0 4px 24px rgba(200, 169, 110, 0.08);
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            border-left: 3px solid var(--sand);
            padding-left: 0.8rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            background: var(--dune-bg);
            border: 1px solid var(--dune-border);
            border-radius: 4px;
            padding: 0.7rem 1rem;
            color: var(--dune-text);
            font-family: var(--font-sans);
            font-size: 0.95rem;
            transition: border-color var(--transition);
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: var(--sand);
            outline: none;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .btn {
            background: var(--sand);
            color: #111;
            border: none;
            padding: 0.7rem 1.5rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background var(--transition), transform 0.15s;
            align-self: flex-start;
        }
        .feedback-card .btn:hover {
            background: var(--sand-light);
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: var(--sand-dark);
            cursor: default;
        }
        .star-rating i {
            transition: color var(--transition), transform 0.15s;
        }
        .star-rating i.active {
            color: var(--sand);
        }
        .star-rating i:hover {
            transform: scale(1.15);
            color: var(--sand-light);
        }
        friend-link {
            display: block;
            background: var(--dune-bg2);
            border-top: 2px solid var(--sand-dark);
            border-bottom: 2px solid var(--sand-dark);
            padding: 1.5rem 0;
            margin: 2.5rem 0 0;
            text-align: center;
        }
        friend-link .fl-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.2rem 2.5rem;
        }
        friend-link a {
            color: var(--dune-muted);
            font-size: 0.95rem;
            transition: color var(--transition);
            position: relative;
        }
        friend-link a::after {
            content: "•";
            color: var(--sand-dark);
            margin-left: 1.2rem;
            opacity: 0.4;
        }
        friend-link a:last-child::after {
            display: none;
        }
        friend-link a:hover {
            color: var(--sand-light);
            text-decoration: none;
        }
        footer {
            background: #0d0d0d;
            padding: 2rem 0 1.5rem;
            text-align: center;
            font-size: 0.9rem;
            color: var(--dune-muted);
            border-top: 1px solid var(--dune-border);
        }
        footer .copyright {
            letter-spacing: 0.5px;
        }
        footer .copyright i {
            color: var(--sand);
            margin: 0 0.3rem;
        }
        .toc {
            background: var(--dune-bg2);
            border: 1px solid var(--dune-border);
            border-radius: var(--radius);
            padding: 1.5rem 2rem;
            margin: 1.5rem 0 2.5rem;
        }
        .toc h3 {
            margin-top: 0;
            font-size: 1.3rem;
        }
        .toc ul {
            columns: 2 220px;
            column-gap: 2rem;
            list-style: none;
            margin: 0.8rem 0 0;
        }
        .toc li {
            margin: 0.3rem 0;
            break-inside: avoid;
        }
        .toc a {
            color: var(--sand);
            display: inline-block;
            padding: 0.2rem 0;
        }
        .toc a:hover {
            color: #f5e7c8;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            background: var(--dune-bg2);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .data-table th {
            background: var(--sand-dark);
            color: #111;
            font-weight: 600;
            padding: 0.8rem 1rem;
            text-align: left;
        }
        .data-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid var(--dune-border);
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: rgba(200, 169, 110, 0.05);
        }
        blockquote {
            border-left: 4px solid var(--sand);
            padding: 1rem 1.8rem;
            margin: 1.8rem 0;
            background: rgba(200, 169, 110, 0.06);
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: var(--dune-accent);
        }
        blockquote cite {
            display: block;
            margin-top: 0.6rem;
            font-size: 0.9rem;
            color: var(--dune-muted);
            font-style: normal;
        }
        @media (max-width: 820px) {
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .toc ul {
                columns: 1;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 680px) {
            .nav-toggle {
                display: inline-block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--dune-bg2);
                border-top: 1px solid var(--dune-border);
                padding: 0.8rem 0;
                margin-top: 0.6rem;
                border-radius: 0 0 var(--radius) var(--radius);
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 0.6rem 1.5rem;
                border-radius: 0;
                width: 100%;
            }
            .header-inner {
                align-items: center;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .hero-image img {
                max-height: 240px;
            }
            .data-table {
                font-size: 0.85rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.5rem 0.6rem;
            }
            .feedback-card {
                padding: 1.2rem;
            }
        }
        @media (min-width: 681px) {
            nav {
                display: flex !important;
            }
        }
        .tag {
            display: inline-block;
            background: var(--sand-dark);
            color: #111;
            font-size: 0.75rem;
            padding: 0.2rem 0.8rem;
            border-radius: 40px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-right: 0.4rem;
        }
        .last-updated {
            font-size: 0.85rem;
            color: var(--dune-muted);
            text-align: right;
            margin-top: 0.2rem;
            border-top: 1px dashed var(--dune-border);
            padding-top: 0.6rem;
        }
        .last-updated i {
            margin-right: 0.4rem;
        }
        .divider {
            border: none;
            border-top: 1px solid var(--dune-border);
            margin: 2rem 0;
        }
        .highlight {
            background: rgba(200, 169, 110, 0.10);
            padding: 0.1rem 0.4rem;
            border-radius: 3px;
        }
        .emoji-big {
            font-size: 1.3rem;
            margin-right: 0.3rem;
        }
        .schema-hidden {
            display: none;
        }