* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #b8860b;
            --primary-dark: #8b6508;
            --accent: #ff4500;
            --bg: #fffcf5;
            --bg-card: #ffffff;
            --text: #2d2d2d;
            --text-light: #5a5a5a;
            --border: #e8dcc8;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 14px;
            --font: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            --transition: 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: var(--primary-dark);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        header {
            padding: 1.2rem 0 0.6rem;
            border-bottom: 2px solid var(--border);
            position: relative;
            background: #fffcf5;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--primary-dark);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--primary);
        }
        .my-logo i {
            color: var(--accent);
            font-size: 2rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary-dark);
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: #f0e4d0;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 1.6rem;
            flex-wrap: wrap;
        }
        nav a {
            font-weight: 600;
            font-size: 1rem;
            padding: 0.4rem 0.2rem;
            border-bottom: 2px solid transparent;
            transition: border-color var(--transition), color var(--transition);
            color: var(--text);
        }
        nav a:hover {
            border-bottom-color: var(--primary);
            color: var(--primary-dark);
            text-decoration: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem 0.8rem;
            padding: 0.8rem 0 0.4rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary-dark);
        }
        .breadcrumb span {
            color: var(--text);
            font-weight: 500;
        }
        .hero {
            padding: 2.4rem 0 1.6rem;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary-dark);
            line-height: 1.2;
            letter-spacing: -0.5px;
        }
        .hero h1 i {
            color: var(--accent);
        }
        .hero .subhead {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-top: 0.6rem;
            max-width: 720px;
            margin-left: auto;
            margin-right: auto;
        }
        .last-updated {
            display: inline-block;
            margin-top: 0.8rem;
            background: #f0e4d0;
            padding: 0.3rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text);
        }
        .last-updated i {
            margin-right: 0.4rem;
            color: var(--primary);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 2.4rem;
            padding: 1.6rem 0 3rem;
        }
        .main-content h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin: 2.4rem 0 0.8rem;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid var(--border);
        }
        .main-content h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #4a3a1a;
            margin: 1.8rem 0 0.6rem;
        }
        .main-content h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #5a4a2a;
            margin: 1.2rem 0 0.4rem;
        }
        .main-content p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: var(--text);
        }
        .main-content ul,
        .main-content ol {
            margin: 0.8rem 0 1.4rem 1.6rem;
        }
        .main-content li {
            margin-bottom: 0.4rem;
            font-size: 1.02rem;
        }
        .main-content .feature-box {
            background: var(--bg-card);
            border-left: 5px solid var(--primary);
            padding: 1.2rem 1.6rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            box-shadow: var(--shadow);
            margin: 1.6rem 0;
        }
        .main-content .feature-box strong {
            color: var(--primary-dark);
        }
        .content-img {
            margin: 2rem 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            background: #f5efe6;
            padding: 0.6rem;
        }
        .content-img img {
            border-radius: calc(var(--radius) - 4px);
        }
        .content-img figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-light);
            padding: 0.6rem 0 0.2rem;
            font-style: italic;
        }
        .sidebar {
            position: sticky;
            top: 1.6rem;
            align-self: start;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.4rem;
            box-shadow: var(--shadow);
            margin-bottom: 1.6rem;
            border: 1px solid var(--border);
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 0.8rem;
            border-bottom: 2px solid var(--border);
            padding-bottom: 0.4rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            padding: 0.3rem 0;
            border-bottom: 1px dashed #f0e4d0;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            font-weight: 500;
        }
        .search-form {
            display: flex;
            gap: 0.4rem;
            margin: 0.8rem 0;
        }
        .search-form input {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid var(--border);
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color var(--transition);
            background: #fff;
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            background: var(--primary-dark);
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 1.2rem;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form button:hover {
            background: var(--primary);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
            margin: 2.4rem 0;
        }
        .feedback-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.6rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .feedback-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-card textarea,
        .feedback-card input {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color var(--transition);
            font-family: var(--font);
            background: #fff;
            margin-bottom: 0.8rem;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: var(--primary);
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card .btn {
            background: var(--primary-dark);
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.6rem 1.6rem;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .feedback-card .btn:hover {
            background: var(--primary);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            margin-bottom: 0.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color var(--transition);
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f5b342;
        }
        friend-link {
            display: block;
            padding: 1.2rem 0;
            border-top: 2px solid var(--border);
            margin-top: 1.6rem;
        }
        friend-link h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 0.8rem;
        }
        friend-link .friend-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.6rem;
        }
        friend-link .friend-list a {
            font-weight: 500;
            background: #f5efe6;
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.9rem;
            transition: background var(--transition), color var(--transition);
        }
        friend-link .friend-list a:hover {
            background: var(--primary);
            color: #fff;
            text-decoration: none;
        }
        footer {
            border-top: 2px solid var(--border);
            padding: 1.6rem 0 2.4rem;
            text-align: center;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        footer .copyright {
            font-weight: 500;
            color: var(--text);
        }
        footer i {
            color: var(--accent);
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
        }
        @media(max-width:768px) {
            body {
                padding: 0 0.8rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 0.4rem;
                padding: 0.8rem 0 0.4rem;
                background: #fffcf5;
                border-top: 1px solid var(--border);
                margin-top: 0.4rem;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 0.6rem 0.8rem;
                border-radius: 8px;
            }
            nav a:hover {
                background: #f0e4d0;
                border-bottom-color: transparent;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .content-grid {
                padding: 0.8rem 0 2rem;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .last-updated {
                font-size: 0.75rem;
                padding: 0.2rem 1rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
        }
        @media(max-width:480px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo i {
                font-size: 1.4rem;
            }
            .main-content h2 {
                font-size: 1.5rem;
            }
            .main-content h3 {
                font-size: 1.25rem;
            }
            .main-content p {
                font-size: 0.98rem;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
        }
        .highlight {
            background: linear-gradient(to right, #f5efe6, #fcf6ee);
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 1.6rem;
            vertical-align: middle;
        }
        .toc {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.2rem 1.6rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin: 1.6rem 0;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ul {
            list-style: none;
            padding: 0;
            margin: 0;
            columns: 2;
            column-gap: 2rem;
        }
        .toc ul li {
            padding: 0.2rem 0;
            break-inside: avoid;
        }
        .toc ul li a {
            font-weight: 500;
        }
        @media(max-width:600px) {
            .toc ul {
                columns: 1;
            }
        }