*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
            background: #f5f3ef;
            color: #1e1e1e;
            line-height: 1.75;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #b8860b;
            text-decoration: underline;
            text-underline-offset: 2px;
            transition: color 0.2s;
        }
        a:hover {
            color: #8b6508;
            text-decoration: none;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: #1a1a2e;
            color: #f5f3ef;
            padding: 0.75rem 0;
            border-bottom: 4px solid #b8860b;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem 1rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: #f5f3ef;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            color: #b8860b;
            font-size: 2rem;
        }
        .my-logo:hover {
            color: #e0c068;
        }
        .my-logo span {
            font-weight: 300;
            font-size: 0.9rem;
            opacity: 0.7;
            display: none;
        }
        @media (min-width: 540px) {
            .my-logo span {
                display: inline;
            }
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .main-nav a {
            color: #ddd;
            text-decoration: none;
            padding: 0.5rem 0.9rem;
            border-radius: 4px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
        }
        .main-nav a:hover {
            background: #b8860b;
            color: #1a1a2e;
        }
        .main-nav a i {
            margin-right: 0.3rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #b8860b;
            color: #b8860b;
            font-size: 1.5rem;
            padding: 0.3rem 0.7rem;
            border-radius: 4px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #b8860b;
            color: #1a1a2e;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #12121f;
                padding: 0.75rem 0;
                border-radius: 0 0 8px 8px;
                margin-top: 0.5rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.7rem 1.2rem;
                width: 100%;
                border-bottom: 1px solid #2a2a3e;
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
        }
        .breadcrumb {
            background: #e8e4de;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            color: #555;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #999;
        }
        .breadcrumb a {
            color: #7a5c00;
        }
        .breadcrumb .current {
            color: #333;
            font-weight: 600;
        }
        main {
            padding: 2.5rem 0 3rem;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.5rem;
            color: #1a1a2e;
            letter-spacing: -0.5px;
        }
        h1 i {
            color: #b8860b;
        }
        .subtitle {
            font-size: 1.1rem;
            color: #666;
            margin-bottom: 1.8rem;
            border-left: 4px solid #b8860b;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 2.8rem 0 1rem 0;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #b8860b;
            color: #1a1a2e;
        }
        h3 {
            font-size: 1.45rem;
            font-weight: 600;
            margin: 2rem 0 0.8rem 0;
            color: #2d2d44;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 1.4rem 0 0.5rem 0;
            color: #3d3d5a;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .content-card {
            background: #fff;
            border-radius: 12px;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            margin-bottom: 2.5rem;
        }
        .content-card p:last-child {
            margin-bottom: 0;
        }
        .featured-img {
            border-radius: 12px;
            margin: 1.8rem 0;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            background: #ddd;
        }
        .img-caption {
            font-size: 0.85rem;
            color: #888;
            text-align: center;
            margin-top: -1rem;
            margin-bottom: 1.8rem;
        }
        .highlight {
            background: #faf0d7;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .insight-box {
            background: #eef5f9;
            border-left: 6px solid #b8860b;
            padding: 1.2rem 1.6rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
        .insight-box i {
            color: #b8860b;
            margin-right: 0.5rem;
        }
        .link-list-inline {
            display: inline;
            font-weight: 600;
            color: #b8860b;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1.2rem;
            margin: 1.8rem 0;
        }
        .stat-item {
            background: #f9f7f4;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
            border: 1px solid #e8e4de;
        }
        .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #b8860b;
            display: block;
        }
        .search-section {
            background: #1a1a2e;
            color: #f5f3ef;
            padding: 2.5rem 0;
            margin-bottom: 2.5rem;
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            max-width: 640px;
            margin: 1rem auto 0;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 180px;
            padding: 0.8rem 1.2rem;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            background: #fff;
            color: #1e1e1e;
        }
        .search-form button {
            padding: 0.8rem 2rem;
            background: #b8860b;
            border: none;
            border-radius: 6px;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .search-form button:hover {
            background: #a07509;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2rem 0;
        }
        @media (max-width: 700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #fff;
            border-radius: 12px;
            padding: 1.8rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            border: 1px solid #e8e4de;
        }
        .feedback-card h3 {
            margin-top: 0;
            border-bottom: 2px solid #b8860b;
            padding-bottom: 0.5rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.7rem 1rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 0.95rem;
            font-family: inherit;
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card button {
            padding: 0.7rem 1.8rem;
            background: #b8860b;
            border: none;
            border-radius: 6px;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #a07509;
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
        }
        .rating-stars .star.active {
            color: #f5b342;
        }
        .site-footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 4px solid #b8860b;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        @media (max-width: 700px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-grid h4 {
            color: #f5f3ef;
            margin-top: 0;
            border-bottom: 2px solid #b8860b;
            padding-bottom: 0.4rem;
        }
        .footer-grid a {
            color: #b8860b;
            text-decoration: none;
        }
        .footer-grid a:hover {
            text-decoration: underline;
        }
        friend-link {
            display: block;
            margin: 1.2rem 0 0.6rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.8rem;
            margin-bottom: 0.4rem;
        }
        .copyright {
            border-top: 1px solid #333;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.85rem;
            color: #999;
        }
        .copyright strong {
            color: #ddd;
        }
        .updated-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #b8860b;
            color: #fff;
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
        }
        .toc {
            background: #f9f7f4;
            border: 1px solid #e8e4de;
            border-radius: 8px;
            padding: 1.4rem 1.8rem;
            margin: 1.8rem 0;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ol {
            padding-left: 1.2rem;
            columns: 2;
            column-gap: 2rem;
        }
        .toc ol li {
            margin-bottom: 0.3rem;
            break-inside: avoid;
        }
        @media (max-width: 600px) {
            .toc ol {
                columns: 1;
            }
        }
        .toc a {
            text-decoration: none;
        }
        .toc a:hover {
            text-decoration: underline;
        }
        .btn-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #b8860b;
            color: #fff;
            border: none;
            border-radius: 50%;
            width: 48px;
            height: 48px;
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            transition: transform 0.2s, background 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 99;
        }
        .btn-top:hover {
            transform: translateY(-3px);
            background: #a07509;
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .content-card {
                padding: 1.2rem 1rem;
            }
            .feedback-card {
                padding: 1.2rem 1rem;
            }
            .container {
                padding: 0 1rem;
            }
        }
        .skeleton {
            background: linear-gradient(90deg, #f0ece6 25%, #e8e4de 50%, #f0ece6 75%);
            background-size: 200% 100%;
            animation: shimmer 1.6s infinite;
            border-radius: 4px;
        }
        @keyframes shimmer {
            0% {
                background-position: 200% 0;
            }
            100% {
                background-position: -200% 0;
            }
        }