*, *::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, 'Helvetica Neue', Arial, sans-serif;
            background: #faf9f6;
            color: #1e1e2a;
            line-height: 1.75;
            padding: 0;
            margin: 0;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: #b45309; text-decoration: none; transition: color 0.2s; }
        a:hover { color: #7a2e0e; text-decoration: underline; }
        h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; letter-spacing: -0.01em; }
        h1 { font-size: 2.4rem; margin-bottom: 1rem; }
        h2 { font-size: 1.8rem; margin: 2.5rem 0 1rem; border-bottom: 2px solid #e5e0d5; padding-bottom: 0.5rem; }
        h3 { font-size: 1.35rem; margin: 1.8rem 0 0.8rem; color: #2d2d3a; }
        h4 { font-size: 1.1rem; margin: 1.2rem 0 0.5rem; color: #3d3d4a; }
        p { margin-bottom: 1.2rem; }
        ul, ol { margin: 0.8rem 0 1.2rem 1.8rem; }
        li { margin-bottom: 0.4rem; }
        strong { color: #2d2d3a; font-weight: 700; }
        blockquote {
            border-left: 4px solid #b45309;
            background: #f3efe8;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #3d3d4a;
        }
        blockquote strong { color: #b45309; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
        .page-wrap { display: flex; flex-direction: column; min-height: 100vh; }
        main { flex: 1; }
        .site-header {
            background: linear-gradient(135deg, #1e1e2a 0%, #2d2d3a 100%);
            color: #f5f0e8;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #f5d6a8;
            text-decoration: none;
            letter-spacing: -0.03em;
            transition: color 0.2s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo:hover { color: #ffd78a; text-decoration: none; }
        .my-logo i { font-size: 1.6rem; color: #b45309; }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li a {
            color: #e5e0d5;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.4rem 0.2rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-menu li a:hover {
            color: #ffd78a;
            border-bottom-color: #b45309;
            text-decoration: none;
        }
        .nav-menu li a i { margin-right: 0.3rem; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #f5f0e8;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            transition: transform 0.2s;
        }
        .hamburger:hover { transform: scale(1.1); }
        .breadcrumbs {
            background: #f3efe8;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #e0dbd0;
        }
        .breadcrumbs ol {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .breadcrumbs ol li::after { content: "›"; margin: 0 0.4rem; color: #8a7a6a; }
        .breadcrumbs ol li:last-child::after { content: ""; }
        .breadcrumbs ol li a { color: #7a5a3a; }
        .breadcrumbs ol li a:hover { color: #b45309; }
        .breadcrumbs ol li span { color: #4a3a2a; font-weight: 500; }
        .hero {
            background: linear-gradient(145deg, #f5efe6 0%, #e8dfd2 100%);
            padding: 3rem 0 2.5rem;
            text-align: center;
            border-bottom: 1px solid #ddd5c8;
        }
        .hero h1 {
            font-size: 2.6rem;
            color: #1e1e2a;
            max-width: 900px;
            margin: 0 auto 0.8rem;
        }
        .hero p {
            font-size: 1.15rem;
            color: #4a3a2a;
            max-width: 750px;
            margin: 0 auto 1rem;
        }
        .hero .meta-badge {
            display: inline-flex;
            align-items: center;
            gap: 1.2rem;
            flex-wrap: wrap;
            justify-content: center;
            font-size: 0.9rem;
            color: #6a5a4a;
            background: rgba(180,83,9,0.08);
            padding: 0.5rem 1.5rem;
            border-radius: 40px;
            margin-top: 0.8rem;
        }
        .hero .meta-badge i { color: #b45309; }
        .featured-img {
            margin: 2rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            background: #e8dfd2;
        }
        .featured-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .featured-img figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #6a5a4a;
            background: #f3efe8;
            font-style: italic;
        }
        .toc {
            background: #f3efe8;
            border-radius: 12px;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border: 1px solid #e0dbd0;
        }
        .toc summary {
            font-size: 1.2rem;
            font-weight: 700;
            cursor: pointer;
            color: #1e1e2a;
        }
        .toc ul {
            margin: 1rem 0 0;
            list-style: none;
            columns: 2;
            column-gap: 2rem;
        }
        .toc ul li { margin-bottom: 0.5rem; }
        .toc ul li a { color: #7a5a3a; font-weight: 500; }
        .toc ul li a:hover { color: #b45309; }
        .toc ul li::before { content: "▸ "; color: #b45309; font-weight: 700; }
        .content-section {
            padding: 2.5rem 0;
            border-bottom: 1px solid #ece6dc;
        }
        .content-section:last-of-type { border-bottom: none; }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        .card {
            background: #ffffff;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 2px 12px rgba(0,0,0,0.05);
            border: 1px solid #ece6dc;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
        .card h4 { margin-top: 0; }
        .card i { color: #b45309; margin-right: 0.4rem; }
        .data-highlight {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.2rem;
            margin: 1.5rem 0;
        }
        .data-item {
            background: #1e1e2a;
            color: #f5f0e8;
            padding: 1.2rem;
            border-radius: 10px;
            text-align: center;
        }
        .data-item .num { font-size: 2.4rem; font-weight: 800; color: #ffd78a; }
        .data-item .label { font-size: 0.9rem; color: #c5b8a8; margin-top: 0.2rem; }
        .form-card {
            background: #ffffff;
            border-radius: 12px;
            padding: 1.8rem;
            border: 1px solid #ece6dc;
            margin: 1.5rem 0;
            box-shadow: 0 2px 8px rgba(0,0,0,0.03);
        }
        .form-card h3 { margin-top: 0; border-bottom: 1px solid #ece6dc; padding-bottom: 0.6rem; }
        .form-group { margin-bottom: 1.2rem; }
        .form-group label { display: block; font-weight: 600; margin-bottom: 0.3rem; color: #2d2d3a; }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid #d5cdc0;
            border-radius: 8px;
            font-size: 1rem;
            background: #faf9f6;
            transition: border-color 0.2s;
        }
        .form-group input:focus, .form-group textarea:focus, .form-group select:focus {
            outline: none;
            border-color: #b45309;
            box-shadow: 0 0 0 3px rgba(180,83,9,0.1);
        }
        .form-group textarea { min-height: 120px; resize: vertical; }
        .btn {
            background: #b45309;
            color: #fff;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover { background: #7a2e0e; transform: translateY(-1px); }
        .btn:active { transform: translateY(0); }
        .btn i { font-size: 1rem; }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.3rem;
            justify-content: flex-start;
        }
        .star-rating input { display: none; }
        .star-rating label {
            font-size: 1.8rem;
            color: #d5cdc0;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #f5b342;
        }
        .search-box {
            display: flex;
            gap: 0.5rem;
            max-width: 500px;
            margin: 0.5rem 0;
        }
        .search-box input {
            flex: 1;
            padding: 0.6rem 1rem;
            border: 1px solid #d5cdc0;
            border-radius: 8px;
            font-size: 1rem;
        }
        .search-box input:focus { border-color: #b45309; outline: none; }
        .site-footer {
            background: #1e1e2a;
            color: #c5b8a8;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 4px solid #b45309;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .site-footer h4 { color: #f5d6a8; margin-bottom: 0.8rem; }
        .site-footer a { color: #c5b8a8; }
        .site-footer a:hover { color: #ffd78a; }
        .site-footer ul { list-style: none; margin: 0; padding: 0; }
        .site-footer ul li { margin-bottom: 0.4rem; }
        .site-footer ul li::before { content: "▸ "; color: #b45309; }
        .copyright {
            border-top: 1px solid #3d3d4a;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.85rem;
        }
        .copyright i { color: #b45309; }
        friend-link {
            display: block;
            margin: 1rem 0;
            font-size: 0.95rem;
        }
        friend-link a {
            color: #c5b8a8;
            margin: 0 0.3rem;
        }
        friend-link a:hover { color: #ffd78a; }
        @media (max-width: 768px) {
            html { font-size: 15px; }
            .hamburger { display: block; }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #2d2d3a;
                padding: 1rem 0;
                border-radius: 0 0 12px 12px;
                gap: 0.3rem;
            }
            .nav-menu.open { display: flex; }
            .nav-menu li a { padding: 0.6rem 1rem; display: block; border-bottom: 1px solid #3d3d4a; }
            .nav-menu li a:hover { border-bottom-color: #b45309; }
            .hero h1 { font-size: 1.8rem; }
            .toc ul { columns: 1; }
            .data-highlight { grid-template-columns: 1fr 1fr; }
            .header-inner { flex-wrap: wrap; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.5rem; }
            .data-highlight { grid-template-columns: 1fr; }
            .card-grid { grid-template-columns: 1fr; }
        }
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #b45309;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
            transition: transform 0.2s, background 0.2s;
            z-index: 999;
        }
        .scroll-top:hover { background: #7a2e0e; transform: translateY(-4px); text-decoration: none; color: #fff; }