*,
        *::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, sans-serif;
            background: #f7f5f0;
            color: #1e1e1e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #b45309;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #78350f;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #1e293b;
            line-height: 1.2;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #1e293b;
            border-left: 6px solid #b45309;
            padding-left: 1rem;
            margin: 2.5rem 0 1.2rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #334155;
            margin: 2rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #475569;
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            color: #334155;
        }
        .lead {
            font-size: 1.2rem;
            color: #1e293b;
            font-weight: 400;
            line-height: 1.8;
        }
        strong,
        b {
            color: #1e293b;
            font-weight: 700;
        }
        em {
            font-style: italic;
            color: #b45309;
        }
        .site-header {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            color: #fff;
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0.8rem 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            color: #fbbf24;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo span {
            color: #fff;
            font-weight: 300;
        }
        .my-logo:hover {
            color: #f59e0b;
            text-decoration: none;
        }
        .my-logo i {
            font-size: 1.8rem;
            color: #fbbf24;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: 0.2s;
        }
        .nav-toggle:hover {
            border-color: #fbbf24;
            color: #fbbf24;
        }
        .nav-menu {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #e2e8f0;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            text-decoration: none;
        }
        .nav-menu a:hover {
            background: rgba(251, 191, 36, 0.15);
            color: #fbbf24;
            text-decoration: none;
        }
        .nav-menu a.active {
            background: #b45309;
            color: #fff;
        }
        .breadcrumb {
            background: #e9e5dd;
            padding: 0.6rem 20px;
            font-size: 0.9rem;
            color: #475569;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: #b45309;
        }
        .breadcrumb a:hover {
            color: #78350f;
        }
        .breadcrumb span {
            color: #64748b;
        }
        .hero {
            background: linear-gradient(135deg, #1e293b 0%, #2d1b00 100%);
            color: #fff;
            padding: 3rem 20px;
            text-align: center;
            border-radius: 0 0 40px 40px;
            margin-bottom: 2rem;
        }
        .hero h1 {
            color: #fbbf24;
            font-size: 3.2rem;
        }
        .hero p {
            color: #e2e8f0;
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
        }
        .hero .meta {
            color: #94a3b8;
            font-size: 0.95rem;
            margin-top: 1rem;
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: 16px;
            box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.2);
        }
        .featured-image figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #64748b;
            margin-top: 0.5rem;
        }
        .search-area {
            background: #fff;
            border-radius: 16px;
            padding: 2rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            margin: 2rem 0;
        }
        .search-area form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-area input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-area input[type="text"]:focus {
            border-color: #b45309;
        }
        .search-area button {
            padding: 14px 32px;
            background: #b45309;
            color: #fff;
            border: none;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .search-area button:hover {
            background: #78350f;
            transform: scale(1.02);
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
        }
        @media (max-width: 768px) {
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: #fff;
            border-radius: 16px;
            padding: 2rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
        }
        .card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .card input,
        .card textarea,
        .card select {
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
        }
        .card input:focus,
        .card textarea:focus,
        .card select:focus {
            border-color: #b45309;
        }
        .card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .card button {
            padding: 12px 24px;
            background: #1e293b;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .card button:hover {
            background: #0f172a;
            transform: scale(1.02);
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #fbbf24;
            cursor: pointer;
        }
        .rating-stars i {
            transition: transform 0.15s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 12px;
            margin: 1.5rem 0;
        }
        .link-grid a {
            background: #fff;
            padding: 10px 16px;
            border-radius: 10px;
            border: 1px solid #e2e8f0;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all 0.2s;
            font-size: 0.95rem;
        }
        .link-grid a:hover {
            border-color: #b45309;
            background: #fffbeb;
            transform: translateY(-2px);
            text-decoration: none;
        }
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 3rem 20px 1.5rem;
            margin-top: 4rem;
            border-radius: 40px 40px 0 0;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-grid h4 {
            color: #fbbf24;
            margin-top: 0;
        }
        .footer-grid a {
            color: #94a3b8;
            display: block;
            padding: 4px 0;
        }
        .footer-grid a:hover {
            color: #fbbf24;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1.2rem 1.5rem;
            border-radius: 12px;
            margin: 1.5rem 0;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        friend-link a {
            color: #fbbf24;
            display: inline-block;
            margin-right: 1.5rem;
            padding: 4px 0;
        }
        friend-link a:hover {
            color: #fff;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.9rem;
            color: #64748b;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 1rem 0 0.5rem;
                gap: 0.2rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.7rem 1rem;
                width: 100%;
                border-radius: 6px;
            }
            h1 {
                font-size: 2rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero {
                padding: 2rem 16px;
            }
            .container {
                padding: 0 14px;
            }
            .breadcrumb {
                padding: 0.4rem 14px;
                font-size: 0.8rem;
            }
            .search-area form {
                flex-direction: column;
            }
            .search-area button {
                width: 100%;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .my-logo i {
                font-size: 1.3rem;
            }
        }
        .highlight-box {
            background: #fffbeb;
            border-left: 6px solid #fbbf24;
            padding: 1.5rem 2rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #1e293b;
            color: #fbbf24;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8fafc;
        }
        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            .two-col {
                grid-template-columns: 1fr;
            }
        }
        .section-toc {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem 2rem;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
            margin: 2rem 0;
        }
        .section-toc ol {
            columns: 2;
            column-gap: 2rem;
            padding-left: 1.2rem;
        }
        .section-toc li {
            margin-bottom: 0.4rem;
            break-inside: avoid;
        }
        @media (max-width: 640px) {
            .section-toc ol {
                columns: 1;
            }
        }
        .emoji-big {
            font-size: 2rem;
            display: inline-block;
            margin-right: 6px;
        }