*,
        *::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, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f6f8fa;
            color: #1a1a2e;
            line-height: 1.7;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #1e40af;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.3;
            color: #0f172a;
        }
        h1 {
            font-size: 2.2rem;
            margin: 1.5rem 0 1rem;
        }
        h2 {
            font-size: 1.75rem;
            margin: 2rem 0 0.8rem;
            border-bottom: 3px solid #2563eb;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.35rem;
            margin: 1.5rem 0 0.6rem;
            color: #1e293b;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1rem 0 0.4rem;
            color: #334155;
        }
        p {
            margin: 0.6rem 0 1rem;
        }
        strong {
            color: #0f172a;
        }
        blockquote {
            border-left: 4px solid #2563eb;
            background: #eef2ff;
            padding: 0.8rem 1.2rem;
            margin: 1rem 0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
        }
        header {
            background: #ffffff;
            border-radius: 0 0 16px 16px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            padding: 0.8rem 1.5rem;
            margin-bottom: 1.2rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            text-decoration: none !important;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #2563eb;
            font-size: 1.4rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none !important;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1a1a2e;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
        }
        nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        nav a {
            padding: 0.4rem 0.9rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #1e293b;
            transition: background 0.2s, color 0.2s;
        }
        nav a:hover {
            background: #eef2ff;
            color: #2563eb;
            text-decoration: none;
        }
        nav a i {
            margin-right: 0.3rem;
            font-size: 0.85rem;
        }
        .breadcrumb {
            font-size: 0.85rem;
            background: #ffffff;
            padding: 0.5rem 1.2rem;
            border-radius: 40px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
            margin-bottom: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb span {
            color: #64748b;
        }
        .breadcrumb .sep {
            color: #94a3b8;
            margin: 0 0.2rem;
        }
        .search-wrap {
            background: #ffffff;
            border-radius: 60px;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
            padding: 0.2rem 0.2rem 0.2rem 1.5rem;
            display: flex;
            align-items: center;
            max-width: 520px;
            margin: 0 auto 2rem;
            border: 1px solid #e2e8f0;
            transition: box-shadow 0.2s;
        }
        .search-wrap:focus-within {
            box-shadow: 0 4px 24px rgba(37, 99, 235, 0.12);
            border-color: #2563eb;
        }
        .search-wrap input {
            flex: 1;
            border: none;
            outline: none;
            padding: 0.8rem 0.4rem;
            font-size: 1rem;
            background: transparent;
            color: #1a1a2e;
        }
        .search-wrap input::placeholder {
            color: #94a3b8;
        }
        .search-wrap button {
            background: #2563eb;
            border: none;
            color: #fff;
            padding: 0.7rem 1.8rem;
            border-radius: 60px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-wrap button:hover {
            background: #1e40af;
        }
        .search-wrap button:active {
            transform: scale(0.97);
        }
        main {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
            padding: 2rem 2.2rem;
            margin-bottom: 2rem;
        }
        .meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.9rem;
            color: #64748b;
            margin-bottom: 0.4rem;
        }
        .meta-line i {
            margin-right: 0.3rem;
        }
        .last-updated {
            background: #f1f5f9;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-weight: 500;
            color: #1e293b;
        }
        .featured-img {
            margin: 1.8rem 0 2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .featured-img img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-img figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #64748b;
            background: #f8fafc;
            border-top: 1px solid #e2e8f0;
        }
        .toc {
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: 14px;
            padding: 1.2rem 1.8rem;
            margin: 1.5rem 0 2rem;
        }
        .toc summary {
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            color: #0f172a;
        }
        .toc ol {
            margin-top: 0.8rem;
            columns: 2 280px;
            column-gap: 2rem;
        }
        .toc li {
            break-inside: avoid;
            margin-bottom: 0.3rem;
        }
        .toc a {
            color: #1e293b;
        }
        .toc a:hover {
            color: #2563eb;
        }
        .rating-wrap {
            background: #f1f5f9;
            border-radius: 14px;
            padding: 1.4rem 2rem;
            margin: 2rem 0 1.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.2rem 2rem;
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #cbd5e1;
            cursor: pointer;
        }
        .rating-stars i {
            transition: color 0.15s, transform 0.1s;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f59e0b;
            transform: scale(1.05);
        }
        .rating-stars i.selected {
            color: #f59e0b;
        }
        .rating-info {
            font-size: 0.95rem;
            color: #475569;
        }
        .rating-info strong {
            color: #0f172a;
        }
        .rating-form {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-wrap: wrap;
        }
        .rating-form input[type="hidden"] {
            display: none;
        }
        .rating-form button {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 0.45rem 1.6rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .rating-form button:hover {
            background: #1e40af;
        }
        .comments-section {
            margin-top: 2.5rem;
            border-top: 2px solid #e2e8f0;
            padding-top: 2rem;
        }
        .comments-section h2 i {
            color: #2563eb;
        }
        .comment-form {
            background: #f8fafc;
            border-radius: 14px;
            padding: 1.5rem 2rem;
            margin: 1.2rem 0 2rem;
        }
        .comment-form label {
            font-weight: 600;
            display: block;
            margin-bottom: 0.2rem;
            color: #0f172a;
        }
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid #e2e8f0;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            background: #fff;
            transition: border-color 0.2s;
            margin-bottom: 1rem;
        }
        .comment-form input:focus,
        .comment-form textarea:focus {
            border-color: #2563eb;
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .comment-form button {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 0.7rem 2.2rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .comment-form button:hover {
            background: #1e40af;
        }
        .comment-list {
            margin-top: 1.5rem;
        }
        .comment-item {
            padding: 1.2rem 1.5rem;
            background: #f8fafc;
            border-radius: 12px;
            margin-bottom: 1rem;
            border-left: 3px solid #2563eb;
        }
        .comment-item .name {
            font-weight: 700;
            color: #0f172a;
        }
        .comment-item .date {
            font-size: 0.8rem;
            color: #94a3b8;
            margin-left: 0.6rem;
        }
        .comment-item .text {
            margin-top: 0.3rem;
            color: #334155;
        }
        friend-link {
            display: block;
            background: #f1f5f9;
            border-radius: 14px;
            padding: 1.2rem 1.8rem;
            margin-top: 2rem;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.6rem 0.2rem 0;
            padding: 0.2rem 0.8rem;
            background: #e2e8f0;
            border-radius: 40px;
            color: #1e293b;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
        }
        friend-link a:hover {
            background: #2563eb;
            color: #fff;
            text-decoration: none;
        }
        friend-link .fl-title {
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 0.4rem;
        }
        footer {
            background: #0f172a;
            color: #cbd5e1;
            border-radius: 20px 20px 0 0;
            padding: 2rem 2.2rem 1.5rem;
            margin-top: 0.4rem;
        }
        footer .copyright {
            text-align: center;
            font-size: 0.9rem;
            border-top: 1px solid #1e293b;
            padding-top: 1.2rem;
            margin-top: 1rem;
            color: #94a3b8;
        }
        footer .copyright strong {
            color: #e2e8f0;
        }
        footer a {
            color: #94a3b8;
        }
        footer a:hover {
            color: #fff;
        }
        @media (max-width: 820px) {
            main {
                padding: 1.2rem 1.2rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            header {
                padding: 0.6rem 1rem;
            }
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 0.8rem;
                gap: 0.2rem;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 0.5rem 0.8rem;
                border-radius: 8px;
                width: 100%;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 0.4rem 0.8rem;
                flex-wrap: wrap;
            }
            .toc ol {
                columns: 1;
            }
            .rating-wrap {
                flex-direction: column;
                align-items: flex-start;
                padding: 1.2rem 1.2rem;
            }
            .search-wrap {
                flex-direction: column;
                border-radius: 20px;
                padding: 0.4rem 0.4rem 0.8rem;
                background: #fff;
            }
            .search-wrap input {
                width: 100%;
                padding: 0.6rem 0.8rem;
            }
            .search-wrap button {
                width: 100%;
                justify-content: center;
                padding: 0.6rem 1.2rem;
            }
            .meta-line {
                flex-direction: column;
                gap: 0.3rem;
            }
            footer {
                padding: 1.5rem 1.2rem 1rem;
            }
            .comment-form {
                padding: 1rem 1.2rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 10px;
            }
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.2rem;
            }
            h3 {
                font-size: 1.05rem;
            }
            main {
                padding: 0.8rem 0.8rem;
                border-radius: 14px;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .rating-stars {
                font-size: 1.4rem;
            }
        }
        .emoji-big {
            font-size: 1.4em;
            margin-right: 0.2rem;
        }
        .highlight {
            background: #fef9c3;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
        }
        .btn-sm {
            background: #e2e8f0;
            border: none;
            padding: 0.2rem 0.8rem;
            border-radius: 40px;
            font-size: 0.8rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .btn-sm:hover {
            background: #cbd5e1;
        }
        .tag {
            display: inline-block;
            background: #eef2ff;
            color: #2563eb;
            font-size: 0.75rem;
            padding: 0.1rem 0.7rem;
            border-radius: 40px;
            font-weight: 600;
        }