*,
        *::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, sans-serif;
            background: #f8f7fc;
            color: #1e1a2e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #6c3fc5;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #4a2a8a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #2d1b69;
            line-height: 1.2;
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2.0rem;
            font-weight: 700;
            color: #3d267a;
            margin-top: 3rem;
            margin-bottom: 1rem;
            border-bottom: 3px solid #e0d6f5;
            padding-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #4d3299;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #5c3da8;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 400;
            color: #2d1b69;
            line-height: 1.8;
            margin-bottom: 2rem;
        }
        strong {
            color: #2d1b69;
            font-weight: 700;
        }
        .highlight {
            background: linear-gradient(120deg, #e8dff5 0%, #e8dff5 60%, transparent 90%);
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background: linear-gradient(135deg, #2d1b69 0%, #4a2a8a 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(45, 27, 105, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.03em;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: opacity 0.2s;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
            color: #fff;
        }
        .my-logo i {
            font-size: 1.6rem;
            color: #ffd54f;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .nav-main a {
            color: rgba(255, 255, 255, 0.85);
            padding: 0.5rem 0.9rem;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: all 0.2s;
            text-decoration: none;
        }
        .nav-main a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        .nav-main a i {
            margin-right: 0.35rem;
            font-size: 0.85rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.3rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-mobile {
            display: none;
            width: 100%;
            background: rgba(45, 27, 105, 0.97);
            border-radius: 0 0 16px 16px;
            padding: 1rem 0.5rem;
            margin-top: 0.5rem;
            flex-direction: column;
            gap: 0.3rem;
        }
        .nav-mobile.open {
            display: flex;
        }
        .nav-mobile a {
            color: rgba(255, 255, 255, 0.85);
            padding: 0.7rem 1rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            text-decoration: none;
            transition: background 0.2s;
        }
        .nav-mobile a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            text-decoration: none;
        }
        .nav-mobile a i {
            width: 1.6rem;
            text-align: center;
        }
        .breadcrumb {
            background: #eeeaf8;
            padding: 0.7rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd6ef;
        }
        .breadcrumb .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem;
        }
        .breadcrumb a {
            color: #6c3fc5;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #7a6b9a;
        }
        .breadcrumb .sep {
            color: #b0a0d0;
            margin: 0 0.2rem;
        }
        .main-content {
            padding: 2.5rem 0 4rem;
        }
        .main-content .container {
            max-width: 1000px;
        }
        .featured-image {
            margin: 2rem 0 2.5rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(45, 27, 105, 0.12);
            background: #e8dff5;
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/9;
        }
        .featured-image figcaption {
            padding: 0.8rem 1.2rem;
            font-size: 0.9rem;
            color: #5a4a7a;
            background: #f4f0fc;
            font-style: italic;
            border-top: 2px solid #e0d6f5;
        }
        .search-section {
            background: #f0ebf9;
            border-radius: 16px;
            padding: 2rem 2rem;
            margin: 2.5rem 0;
            border: 1px solid #ddd6ef;
        }
        .search-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .search-form {
            display: flex;
            gap: 0.8rem;
            flex-wrap: wrap;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 0.8rem 1.2rem;
            border: 2px solid #d5c8ed;
            border-radius: 10px;
            font-size: 1rem;
            background: #fff;
            transition: border-color 0.2s;
            outline: none;
        }
        .search-form input[type="text"]:focus {
            border-color: #6c3fc5;
            box-shadow: 0 0 0 3px rgba(108, 63, 197, 0.15);
        }
        .search-form button {
            padding: 0.8rem 2rem;
            background: #6c3fc5;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #4a2a8a;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(108, 63, 197, 0.3);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
        }
        .feedback-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            border: 1px solid #e8e0f2;
            box-shadow: 0 4px 16px rgba(45, 27, 105, 0.05);
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 0.8rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.7rem 1rem;
            border: 2px solid #ddd6ef;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            background: #faf8fe;
            transition: border-color 0.2s;
            outline: none;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #6c3fc5;
            box-shadow: 0 0 0 3px rgba(108, 63, 197, 0.1);
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card .star-select {
            display: flex;
            gap: 0.5rem;
            align-items: center;
            font-size: 1.4rem;
            color: #d5c8ed;
        }
        .feedback-card .star-select i {
            cursor: pointer;
            transition: color 0.15s;
        }
        .feedback-card .star-select i.active,
        .feedback-card .star-select i:hover {
            color: #ffb800;
        }
        .feedback-card button {
            padding: 0.7rem 1.6rem;
            background: #6c3fc5;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            align-self: flex-start;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card button:hover {
            background: #4a2a8a;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(108, 63, 197, 0.25);
        }
        .update-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #e8dff5;
            color: #3d267a;
            padding: 0.4rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
        }
        .update-badge i {
            color: #6c3fc5;
        }
        friend-link {
            display: block;
            background: #f0ebf9;
            border-radius: 16px;
            padding: 2rem 2rem;
            margin-top: 3rem;
            border: 1px solid #ddd6ef;
        }
        friend-link h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.5rem;
            margin: 0.8rem 0 0;
        }
        friend-link li {
            margin: 0;
        }
        friend-link a {
            color: #6c3fc5;
            font-weight: 500;
            text-decoration: none;
            padding: 0.2rem 0;
            border-bottom: 2px solid transparent;
            transition: all 0.2s;
        }
        friend-link a:hover {
            border-bottom-color: #6c3fc5;
            text-decoration: none;
        }
        .site-footer {
            background: #1e1a2e;
            color: rgba(255, 255, 255, 0.8);
            padding: 2.5rem 0 1.8rem;
            margin-top: 3rem;
        }
        .site-footer .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 1rem;
        }
        .site-footer .copyright {
            font-size: 0.9rem;
            opacity: 0.7;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
            justify-content: center;
        }
        .site-footer .copyright i {
            color: #ffd54f;
        }
        .site-footer a {
            color: #b8a8e0;
        }
        .site-footer a:hover {
            color: #fff;
        }
        @media (max-width: 900px) {
            h1 {
                font-size: 2.0rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .header-inner {
                padding: 0 1rem;
            }
            .nav-main {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
            .feedback-card button {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 600px) {
            .container {
                padding: 0 1rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .lead {
                font-size: 1.05rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo i {
                font-size: 1.2rem;
            }
            .search-section,
            .feedback-card,
            friend-link {
                padding: 1.2rem 1.2rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            .featured-image figcaption {
                font-size: 0.8rem;
                padding: 0.5rem 0.8rem;
            }
            .update-badge {
                font-size: 0.75rem;
                padding: 0.3rem 0.8rem;
            }
        }
        @media (min-width: 901px) {
            .nav-mobile {
                display: none !important;
            }
        }
        .toc {
            background: #f4f0fc;
            border-radius: 16px;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border: 1px solid #e0d6f5;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ol {
            margin: 0.5rem 0 0;
            columns: 2;
            column-gap: 2rem;
        }
        .toc li {
            break-inside: avoid;
            padding: 0.2rem 0;
        }
        .toc a {
            color: #4d3299;
        }
        @media (max-width: 600px) {
            .toc ol {
                columns: 1;
            }
        }
        .quote-block {
            background: #fff;
            border-left: 4px solid #6c3fc5;
            padding: 1.2rem 1.8rem;
            margin: 1.5rem 0;
            border-radius: 0 12px 12px 0;
            box-shadow: 0 2px 8px rgba(45, 27, 105, 0.06);
            font-style: italic;
            color: #3d267a;
        }
        .quote-block .author {
            font-style: normal;
            font-weight: 600;
            margin-top: 0.5rem;
            display: block;
            color: #6c3fc5;
        }
        .inline-link {
            font-weight: 500;
            padding: 0.1rem 0.2rem;
        }
        .btn-icon {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: #fff;
            border-radius: 12px;
            padding: 1.2rem;
            text-align: center;
            border: 1px solid #e8e0f2;
            box-shadow: 0 2px 8px rgba(45, 27, 105, 0.04);
        }
        .stat-card .number {
            font-size: 2rem;
            font-weight: 800;
            color: #6c3fc5;
            display: block;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: #7a6b9a;
            margin-top: 0.2rem;
        }