*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 1rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1e40af;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0f172a;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 3px solid #3b82f6;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            background: #fff;
            border-radius: 24px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
            padding: 1.8rem 2rem;
            margin: 1.5rem 0 2.5rem 0;
        }
        @media (max-width: 600px) {
            body {
                padding: 0 0.6rem;
            }
            .container {
                padding: 1rem 1rem;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.6rem 0;
            border-bottom: 2px solid #e2e8f0;
            margin-bottom: 0.8rem;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            color: #1e293b;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #3b82f6, #8b5cf6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #3b82f6;
            font-size: 2rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #64748b;
            font-weight: 400;
            display: block;
            letter-spacing: 0.3px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.2rem;
            flex-wrap: wrap;
            padding: 0;
        }
        .nav-list li a {
            display: inline-block;
            padding: 0.5rem 0.9rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #1e293b;
            background: transparent;
            transition: background 0.2s, color 0.2s;
        }
        .nav-list li a:hover {
            background: #eef2ff;
            color: #2563eb;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: #1e293b;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 8px;
        }
        .hamburger:hover {
            background: #f1f5f9;
        }
        @media (max-width: 700px) {
            .hamburger {
                display: inline-block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                border-radius: 16px;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
                padding: 0.8rem 0.2rem;
                margin-top: 0.6rem;
                border: 1px solid #e2e8f0;
            }
            .nav-list.show {
                display: flex;
            }
            .nav-list li a {
                padding: 0.6rem 1.2rem;
                border-radius: 0;
            }
            .nav-wrapper {
                flex-wrap: wrap;
                justify-content: flex-end;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.6rem 0 0.2rem 0;
            font-size: 0.85rem;
            color: #64748b;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding-right: 0.5rem;
            color: #94a3b8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #3b82f6;
        }
        .breadcrumb a:hover {
            color: #1e40af;
        }
        .search-area {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1.2rem 0 0.8rem 0;
            background: #f1f5f9;
            padding: 0.8rem 1rem;
            border-radius: 60px;
            align-items: center;
        }
        .search-area i {
            color: #64748b;
            font-size: 1.1rem;
        }
        .search-area input {
            flex: 1;
            min-width: 140px;
            border: none;
            background: transparent;
            padding: 0.5rem 0.2rem;
            font-size: 0.95rem;
            outline: none;
            color: #1e293b;
        }
        .search-area input::placeholder {
            color: #94a3b8;
        }
        .search-area button {
            background: #3b82f6;
            border: none;
            color: #fff;
            padding: 0.45rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .search-area button:hover {
            background: #2563eb;
        }
        .toc {
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            padding: 1.2rem 1.6rem;
            margin: 1.4rem 0 2rem 0;
        }
        .toc h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .toc ul {
            columns: 2 240px;
            list-style: none;
            padding: 0.6rem 0 0 0;
        }
        .toc ul li {
            padding: 0.2rem 0;
        }
        .toc ul li a {
            color: #2563eb;
            font-weight: 500;
        }
        .toc ul li a:hover {
            color: #1e40af;
        }
        .feature-img {
            margin: 1.8rem 0;
            border-radius: 16px;
            overflow: hidden;
            background: #e2e8f0;
            position: relative;
        }
        .feature-img img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
        }
        .feature-img .img-caption {
            background: rgba(15, 23, 42, 0.75);
            color: #f1f5f9;
            padding: 0.5rem 1rem;
            font-size: 0.85rem;
            text-align: center;
            backdrop-filter: blur(4px);
        }
        .user-feedback {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
            margin: 2.2rem 0 1rem 0;
            background: #f8fafc;
            border-radius: 20px;
            padding: 1.6rem 1.8rem;
            border: 1px solid #e2e8f0;
        }
        .feedback-form {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }
        .feedback-form h4 {
            margin: 0 0 0.2rem 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-form textarea,
        .feedback-form input {
            padding: 0.7rem 1rem;
            border-radius: 12px;
            border: 1px solid #cbd5e1;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s;
            resize: vertical;
        }
        .feedback-form textarea:focus,
        .feedback-form input:focus {
            border-color: #3b82f6;
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }
        .feedback-form button {
            align-self: flex-start;
            background: #3b82f6;
            color: #fff;
            border: none;
            padding: 0.55rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .feedback-form button:hover {
            background: #2563eb;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            font-size: 1.4rem;
            color: #cbd5e1;
            cursor: pointer;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.15s;
            color: #cbd5e1;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f59e0b;
        }
        @media (max-width: 640px) {
            .user-feedback {
                grid-template-columns: 1fr;
                padding: 1.2rem;
            }
        }
        .link-list {
            background: #f1f5f9;
            border-radius: 16px;
            padding: 1.2rem 1.6rem;
            margin: 1.6rem 0;
            border-left: 4px solid #3b82f6;
        }
        .link-list ul {
            list-style: none;
            padding: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
            gap: 0.4rem 1rem;
        }
        .link-list ul li {
            padding: 0.15rem 0;
        }
        .link-list ul li a {
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .link-list ul li a i {
            font-size: 0.7rem;
            color: #3b82f6;
        }
        friend-link {
            display: block;
            background: #f1f5f9;
            border-radius: 16px;
            padding: 1.2rem 1.6rem;
            margin: 1.6rem 0 0.6rem 0;
            border: 1px solid #e2e8f0;
        }
        friend-link::before {
            content: "🌐 Friend Links";
            display: block;
            font-weight: 700;
            font-size: 1.1rem;
            color: #0f172a;
            margin-bottom: 0.6rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            margin-bottom: 0.3rem;
            font-weight: 500;
        }
        .site-footer {
            border-top: 2px solid #e2e8f0;
            padding: 1.8rem 0 1rem 0;
            margin-top: 2rem;
            font-size: 0.9rem;
            color: #64748b;
            text-align: center;
        }
        .site-footer .copyright {
            font-weight: 500;
            color: #334155;
        }
        .hidden-schema {
            display: none;
        }
        .badge {
            display: inline-block;
            background: #dbeafe;
            color: #1e40af;
            padding: 0.1rem 0.7rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .last-updated {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: #64748b;
            margin: 0.2rem 0 0.8rem 0;
        }
        .highlight {
            background: #fef9c3;
            padding: 0 0.2rem;
            border-radius: 4px;
        }
        .btn-top {
            position: fixed;
            bottom: 1.8rem;
            right: 1.8rem;
            background: #3b82f6;
            color: #fff;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
            transition: transform 0.2s, background 0.2s;
            z-index: 99;
            border: none;
            cursor: pointer;
        }
        .btn-top:hover {
            background: #2563eb;
            transform: translateY(-3px);
        }
        @media (max-width: 500px) {
            .btn-top {
                right: 1rem;
                bottom: 1rem;
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
        }