*,
        *::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: #f9f5fc;
            color: #2d1b3a;
            line-height: 1.7;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #8b3a9e;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #c65fd7;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #1f0f2b;
            margin-top: 1.8rem;
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            border-bottom: 4px solid #d9a6e0;
            padding-bottom: 0.4rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 6px solid #b57cc9;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #4a2a5e;
        }
        h4 {
            font-size: 1.15rem;
            color: #5e3b72;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            background: #ffffff;
            border-radius: 24px;
            padding: 1.8rem 2rem;
            box-shadow: 0 12px 40px rgba(106, 27, 154, 0.08);
            margin: 1.5rem 0 2rem;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.6rem;
            border-bottom: 2px solid #e8d5f0;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #9c27b0, #e040fb);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: inline-block;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
            -webkit-text-fill-color: transparent;
        }
        .my-logo a::after {
            content: "™";
            font-size: 0.6rem;
            vertical-align: super;
            -webkit-text-fill-color: #b57cc9;
            color: #b57cc9;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 0.2rem;
        }
        nav ul {
            list-style: none;
            display: flex;
            gap: 1.2rem;
            padding: 0;
            margin: 0;
        }
        nav ul li a {
            font-weight: 600;
            padding: 0.4rem 0.2rem;
            border-bottom: 3px solid transparent;
            transition: border-color 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        nav ul li a:hover {
            border-bottom-color: #b57cc9;
            color: #6a1b9a;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #4a2a5e;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #f0e6f6;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            font-size: 0.85rem;
            background: #f3ecf7;
            padding: 0.5rem 1.2rem;
            border-radius: 40px;
            margin: 0.6rem 0 0;
            width: 100%;
        }
        .breadcrumb a {
            color: #7a4b8c;
        }
        .breadcrumb span {
            color: #3f2a4a;
        }
        .breadcrumb .sep {
            color: #b99ac9;
        }
        .search-wrap {
            background: #f3ecf7;
            border-radius: 60px;
            display: flex;
            align-items: center;
            padding: 0.2rem 0.2rem 0.2rem 1.2rem;
            margin: 1.6rem 0 0.8rem;
            border: 1px solid #dcc6e8;
            transition: box-shadow 0.2s;
        }
        .search-wrap:focus-within {
            box-shadow: 0 0 0 4px rgba(156, 39, 176, 0.18);
        }
        .search-wrap input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.7rem 0;
            font-size: 1rem;
            outline: none;
            color: #2d1b3a;
        }
        .search-wrap input::placeholder {
            color: #9a7caa;
        }
        .search-wrap button {
            background: #9c27b0;
            border: none;
            color: #fff;
            padding: 0.6rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-wrap button:hover {
            background: #7b1fa2;
        }
        .featured-img {
            margin: 1.8rem 0 2.2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 24px rgba(106, 27, 154, 0.12);
        }
        .featured-img img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-img figcaption {
            background: #f3ecf7;
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            color: #4a2a5e;
            text-align: center;
            font-style: italic;
        }
        .user-feedback {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0 1.5rem;
            background: #faf8fc;
            border-radius: 20px;
            padding: 1.8rem 2rem;
            border: 1px solid #e8d5f0;
        }
        .feedback-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-section form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.6rem;
        }
        .feedback-section form input,
        .feedback-section form textarea {
            border: 1px solid #dcc6e8;
            border-radius: 12px;
            padding: 0.7rem 1rem;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fff;
            transition: border-color 0.2s;
        }
        .feedback-section form input:focus,
        .feedback-section form textarea:focus {
            border-color: #9c27b0;
            outline: none;
            box-shadow: 0 0 0 3px rgba(156, 39, 176, 0.12);
        }
        .feedback-section form textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-section form button {
            background: #9c27b0;
            color: #fff;
            border: none;
            padding: 0.7rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
            font-size: 0.95rem;
        }
        .feedback-section form button:hover {
            background: #7b1fa2;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.3rem;
            justify-content: flex-end;
            margin: 0.4rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #dcc6e8;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f9a825;
        }
        .rating-value {
            font-weight: 600;
            color: #4a2a5e;
        }
        friend-link {
            display: block;
            padding: 1.5rem 0 0.8rem;
            border-top: 2px solid #e8d5f0;
            margin-top: 1.5rem;
        }
        friend-link h3 {
            margin-top: 0;
            font-size: 1.2rem;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.6rem;
        }
        friend-link ul li a {
            font-weight: 500;
            padding: 0.2rem 0;
        }
        footer {
            text-align: center;
            padding: 1.8rem 0 2.2rem;
            color: #5e3b72;
            font-size: 0.9rem;
            border-top: 2px solid #e8d5f0;
            margin-top: 1.5rem;
        }
        footer .copyright {
            margin-top: 0.6rem;
            opacity: 0.8;
        }
        .toc {
            background: #f7f0fa;
            border-radius: 16px;
            padding: 1.4rem 1.8rem;
            margin: 1.2rem 0 2rem;
            border-left: 6px solid #b57cc9;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ol {
            margin: 0.4rem 0 0;
            columns: 2 220px;
            column-gap: 2rem;
        }
        .toc ol li {
            margin-bottom: 0.3rem;
            break-inside: avoid;
        }
        .toc ol li a {
            font-weight: 500;
        }
        @media (max-width: 820px) {
            body {
                padding: 0 0.6rem;
            }
            .container {
                padding: 1rem 1.2rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            header {
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                padding: 0.8rem 1rem;
                border-radius: 16px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
                gap: 0.4rem;
                margin-top: 0.6rem;
                border: 1px solid #e8d5f0;
            }
            nav ul.show {
                display: flex;
            }
            .hamburger {
                display: inline-block;
            }
            .user-feedback {
                grid-template-columns: 1fr;
                gap: 1.5rem;
                padding: 1.2rem 1.2rem;
            }
            .toc ol {
                columns: 1;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 0.4rem 0.8rem;
            }
            .search-wrap {
                flex-wrap: wrap;
                padding: 0.3rem 0.3rem 0.3rem 1rem;
            }
            .search-wrap button {
                padding: 0.5rem 1rem;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0.8rem 0.8rem;
            }
            h1 {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .star-rating label {
                font-size: 1.5rem;
            }
        }
        .text-sm {
            font-size: 0.9rem;
        }
        .text-muted {
            color: #6d5280;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .gap-1 {
            gap: 1rem;
        }
        .badge {
            background: #e8d5f0;
            padding: 0.2rem 0.8rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #4a2a5e;
        }
        .updated {
            display: inline-block;
            background: #f3ecf7;
            padding: 0.25rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            color: #5e3b72;
        }
        :target {
            scroll-margin-top: 80px;
        }