* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8f5f0;
            color: #2c2c2c;
            line-height: 1.7;
            font-size: 1.0625rem;
            padding: 0 1.25rem;
        }
        .wrapper {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
            border-radius: 28px 28px 0 0;
            overflow: hidden;
            padding: 0 2rem 2rem;
        }
        header {
            padding: 1.8rem 0 0.6rem;
            border-bottom: 2px solid #e6ddd0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            text-decoration: none;
            color: #2a1b0e;
            background: linear-gradient(145deg, #7a4a2e, #b8864e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            transition: transform 0.2s ease;
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .my-logo small {
            font-size: 0.7rem;
            display: block;
            -webkit-text-fill-color: #6b4c3b;
            color: #6b4c3b;
            font-weight: 400;
            letter-spacing: 0.04em;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #3d2b1c;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #ede6dc;
        }
        nav#main-nav ul {
            display: flex;
            flex-wrap: wrap;
            gap: 0.2rem 0.5rem;
            list-style: none;
            align-items: center;
        }
        nav#main-nav ul li a {
            display: inline-block;
            padding: 0.5rem 1.1rem;
            border-radius: 40px;
            text-decoration: none;
            color: #3d2b1c;
            font-weight: 500;
            font-size: 0.95rem;
            transition: background 0.25s, color 0.25s;
        }
        nav#main-nav ul li a:hover {
            background: #7a4a2e;
            color: #fff;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem 0.6rem;
            padding: 1rem 0 0.4rem;
            font-size: 0.9rem;
            color: #6f5e4f;
            width: 100%;
        }
        .breadcrumb a {
            color: #7a4a2e;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #a18f7a;
        }
        .search-wrap {
            display: flex;
            justify-content: flex-end;
            margin: 1rem 0 0.5rem;
            width: 100%;
        }
        .search-form {
            display: flex;
            max-width: 360px;
            width: 100%;
            background: #f3efe9;
            border-radius: 60px;
            border: 1px solid #ddd2c2;
            overflow: hidden;
            transition: box-shadow 0.2s;
        }
        .search-form:focus-within {
            box-shadow: 0 0 0 3px rgba(122, 74, 46, 0.2);
            border-color: #7a4a2e;
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 0.65rem 1.2rem;
            background: transparent;
            font-size: 0.95rem;
            outline: none;
        }
        .search-form button {
            background: #7a4a2e;
            border: none;
            color: #fff;
            padding: 0 1.2rem;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.2s;
        }
        .search-form button:hover {
            background: #5e3721;
        }
        .toc {
            background: #f4efe8;
            padding: 1.6rem 2rem;
            border-radius: 24px;
            margin: 2rem 0 2.5rem;
            border-left: 6px solid #b8864e;
        }
        .toc h2 {
            font-size: 1.5rem;
            margin-bottom: 0.8rem;
            color: #2a1b0e;
        }
        .toc ol {
            columns: 2 260px;
            column-gap: 2rem;
            padding-left: 1.4rem;
        }
        .toc ol li {
            margin-bottom: 0.4rem;
            break-inside: avoid;
        }
        .toc ol li a {
            text-decoration: none;
            color: #4d3423;
            font-weight: 500;
        }
        .toc ol li a:hover {
            color: #7a4a2e;
            text-decoration: underline;
        }
        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: #1f130b;
            margin: 1.2rem 0 0.6rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 2.4rem 0 1rem;
            color: #2a1b0e;
            border-bottom: 3px solid #e6ddd0;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 1.8rem 0 0.8rem;
            color: #3d2b1c;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.2rem 0 0.5rem;
            color: #4d3423;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .content-img {
            max-width: 100%;
            height: auto;
            border-radius: 20px;
            margin: 1.8rem 0;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            display: block;
        }
        figure {
            margin: 1.8rem 0;
            text-align: center;
        }
        figure img {
            max-width: 100%;
            height: auto;
            border-radius: 20px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }
        figure figcaption {
            font-size: 0.9rem;
            color: #6f5e4f;
            margin-top: 0.5rem;
            font-style: italic;
        }
        .highlight-box {
            background: #faf6f0;
            border-left: 6px solid #b8864e;
            padding: 1.5rem 2rem;
            border-radius: 16px;
            margin: 1.8rem 0;
        }
        .highlight-box strong {
            color: #7a4a2e;
        }
        blockquote {
            border-left: 5px solid #b8864e;
            padding: 1rem 2rem;
            margin: 1.8rem 0;
            background: #f9f5ef;
            border-radius: 0 16px 16px 0;
            font-style: italic;
            color: #3d2c1d;
        }
        .user-feedback {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 3rem 0 1.5rem;
            padding: 2rem 0;
            border-top: 2px solid #e6ddd0;
            border-bottom: 2px solid #e6ddd0;
        }
        .comment-section,
        .rating-section {
            flex: 1 1 280px;
        }
        .comment-section h3,
        .rating-section h3 {
            margin-top: 0;
            font-size: 1.4rem;
        }
        .comment-section form,
        .rating-section form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.6rem;
        }
        .comment-section input,
        .comment-section textarea,
        .rating-section select {
            padding: 0.7rem 1rem;
            border: 1px solid #ddd2c2;
            border-radius: 12px;
            font-size: 0.95rem;
            background: #fcfaf7;
            transition: border 0.2s;
        }
        .comment-section input:focus,
        .comment-section textarea:focus,
        .rating-section select:focus {
            border-color: #7a4a2e;
            outline: none;
            box-shadow: 0 0 0 3px rgba(122, 74, 46, 0.1);
        }
        .comment-section textarea {
            resize: vertical;
            min-height: 90px;
        }
        .btn {
            background: #7a4a2e;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            font-size: 0.95rem;
            align-self: flex-start;
        }
        .btn:hover {
            background: #5e3721;
            transform: translateY(-2px);
        }
        .btn:active {
            transform: translateY(0);
        }
        friend-link {
            display: block;
            margin: 2.5rem 0 0.8rem;
            padding: 1.8rem 2rem;
            background: #f4efe8;
            border-radius: 24px;
        }
        friend-link h3 {
            margin-top: 0;
            font-size: 1.3rem;
            color: #2a1b0e;
        }
        friend-link ul {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
            list-style: none;
            padding: 0.6rem 0 0;
        }
        friend-link ul li a {
            color: #4d3423;
            text-decoration: none;
            font-weight: 500;
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s;
        }
        friend-link ul li a:hover {
            border-bottom-color: #7a4a2e;
            color: #7a4a2e;
        }
        footer {
            text-align: center;
            padding: 2rem 0 1.5rem;
            color: #6f5e4f;
            font-size: 0.9rem;
            border-top: 2px solid #e6ddd0;
            margin-top: 1.5rem;
        }
        footer .copyright {
            margin-top: 0.6rem;
            letter-spacing: 0.02em;
        }
        .last-updated {
            display: inline-block;
            background: #ede6dc;
            padding: 0.2rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #4d3423;
            margin: 0.5rem 0 1rem;
        }
        @media (max-width: 820px) {
            .wrapper {
                padding: 0 1rem 1.5rem;
                border-radius: 18px 18px 0 0;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .my-logo {
                font-size: 1.6rem;
            }
            .toc ol {
                columns: 1;
            }
            header {
                flex-wrap: wrap;
            }
            nav#main-nav {
                display: none;
                width: 100%;
                margin-top: 0.8rem;
            }
            nav#main-nav.open {
                display: block;
            }
            nav#main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 0.3rem;
            }
            nav#main-nav ul li a {
                display: block;
                padding: 0.6rem 1rem;
                background: #f4efe8;
                border-radius: 12px;
            }
            .nav-toggle {
                display: block;
            }
            .search-wrap {
                justify-content: stretch;
            }
            .search-form {
                max-width: 100%;
            }
            .user-feedback {
                flex-direction: column;
                gap: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.75rem;
            }
            .wrapper {
                padding: 0 0.75rem 1.2rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            .toc {
                padding: 1rem 1.2rem;
            }
            .highlight-box {
                padding: 1rem 1.2rem;
            }
            friend-link {
                padding: 1rem 1.2rem;
            }
        }
        html {
            scroll-behavior: smooth;
        }
        a {
            color: #7a4a2e;
        }
        a:hover {
            color: #5e3721;
        }
        strong {
            color: #2c1a0e;
        }
        .emoji-lg {
            font-size: 1.3em;
        }