*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f8f9fc;
            color: #1e1e2a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #c0392b;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #922b21;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        header {
            background: #ffffff;
            border-radius: 0 0 24px 24px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(6px);
            background: rgba(255, 255, 255, 0.96);
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #d32f2f, #b71c1c);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #d32f2f;
            font-size: 2rem;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.2rem;
            padding: 0;
            margin: 0;
        }
        .nav-list li a {
            padding: 0.5rem 1rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #2c3e50;
            transition: all 0.2s ease;
        }
        .nav-list li a:hover {
            background: #d32f2f10;
            color: #d32f2f;
            text-decoration: none;
        }
        .nav-list li a.active {
            background: #d32f2f;
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1e1e2a;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #f0f0f0;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                background: #fff;
                position: absolute;
                top: 70px;
                left: 1rem;
                right: 1rem;
                border-radius: 20px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
                padding: 1rem 0.5rem;
                gap: 0.2rem;
                border: 1px solid #f0f0f0;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 0.7rem 1.2rem;
                font-size: 1rem;
            }
            .header-inner {
                position: relative;
            }
        }
        .breadcrumb {
            background: transparent;
            padding: 0.75rem 0 0.5rem 0;
            font-size: 0.85rem;
            color: #5a5a6e;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.5rem;
            list-style: none;
        }
        .breadcrumb li {
            display: inline;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "·";
            margin-right: 0.5rem;
            color: #aaa;
        }
        .breadcrumb a {
            color: #5a5a6e;
        }
        .breadcrumb a:hover {
            color: #d32f2f;
        }
        .breadcrumb .current {
            color: #1e1e2a;
            font-weight: 600;
        }
        main {
            padding: 2rem 0 3rem;
        }
        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 0.5rem 0 1.5rem;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #1e1e2a, #d32f2f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #d32f2f20;
            color: #1e1e2a;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 1.8rem 0 0.8rem;
            color: #2c3e50;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.2rem 0 0.5rem;
            color: #34495e;
        }
        p {
            margin: 0.8rem 0 1.2rem;
            color: #2d2d3a;
        }
        .lead {
            font-size: 1.2rem;
            color: #3d3d4e;
            font-weight: 400;
            max-width: 800px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        @media (min-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr 320px;
            }
        }
        .article-body {
            background: #fff;
            border-radius: 24px;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
        }
        .sidebar {
            background: #fff;
            border-radius: 24px;
            padding: 1.8rem 1.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        @media (max-width: 991px) {
            .sidebar {
                position: static;
            }
            .article-body {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
        }
        .feature-image {
            margin: 1.5rem 0 2rem;
            border-radius: 16px;
            overflow: hidden;
            background: #eef0f5;
            position: relative;
        }
        .feature-image img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #5a5a6e;
            background: #f8f9fc;
            border-radius: 0 0 16px 16px;
        }
        .link-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem 1rem;
            margin: 1rem 0;
            padding: 0.8rem 1rem;
            background: #f8f9fc;
            border-radius: 12px;
        }
        .link-group a {
            font-weight: 500;
            font-size: 0.9rem;
        }
        .search-box {
            display: flex;
            gap: 0.5rem;
            margin: 1.5rem 0;
            flex-wrap: wrap;
        }
        .search-box input {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #e0e0e8;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
            background: #fff;
        }
        .search-box input:focus {
            border-color: #d32f2f;
        }
        .search-box button {
            padding: 0.7rem 1.8rem;
            background: #d32f2f;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-box button:hover {
            background: #b71c1c;
            transform: scale(0.98);
        }
        .feedback-section {
            background: #fff;
            border-radius: 24px;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
            margin-top: 2rem;
        }
        @media (max-width: 768px) {
            .feedback-section {
                padding: 1.5rem;
            }
        }
        .feedback-section h2 {
            border-bottom-color: #d32f2f30;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #2c3e50;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #e0e0e8;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            transition: border 0.2s;
            background: #fafbfc;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #d32f2f;
            outline: none;
            background: #fff;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }
        @media (max-width: 600px) {
            .form-row {
                grid-template-columns: 1fr;
            }
        }
        .btn-primary {
            padding: 0.8rem 2.2rem;
            background: #d32f2f;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-primary:hover {
            background: #b71c1c;
            transform: scale(0.98);
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars i {
            transition: color 0.2s, transform 0.1s;
        }
        .rating-stars i:hover,
        .rating-stars i:hover~i {
            color: #f1c40f;
            transform: scale(1.1);
        }
        .rating-stars i.active {
            color: #f1c40f;
        }
        footer {
            background: #1e1e2a;
            color: #ccc;
            border-radius: 24px 24px 0 0;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        footer .container {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 768px) {
            footer .container {
                grid-template-columns: 2fr 1fr 1fr;
            }
        }
        footer a {
            color: #e0a0a0;
        }
        footer a:hover {
            color: #fff;
        }
        .footer-logo {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-logo span {
            background: linear-gradient(145deg, #d32f2f, #ff6f6f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid #333345;
            padding-top: 1.2rem;
            font-size: 0.85rem;
            text-align: center;
            color: #888;
        }
        friend-link {
            display: block;
            margin: 0.5rem 0;
            font-size: 0.9rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1rem;
            margin-bottom: 0.3rem;
        }
        .text-muted {
            color: #6a6a7e;
            font-size: 0.9rem;
        }
        .tag {
            display: inline-block;
            background: #d32f2f10;
            color: #d32f2f;
            padding: 0.2rem 0.8rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .last-updated {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: #6a6a7e;
            margin: 0.5rem 0 1.5rem;
        }
        .stat-box {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #f8f9fc;
            padding: 0.4rem 1rem;
            border-radius: 40px;
            font-size: 0.85rem;
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.6rem;
            }
            .article-body {
                padding: 1rem;
            }
            .feedback-section {
                padding: 1rem;
            }
            .search-box button {
                padding: 0.6rem 1.2rem;
                font-size: 0.9rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo i {
                font-size: 1.4rem;
            }
        }
        :target {
            scroll-margin-top: 90px;
        }
        .schema-hidden {
            display: none;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            border-bottom: 2px solid #f0f0f0;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0.8rem 0;
        }
        .sidebar ul li {
            margin-bottom: 0.4rem;
        }
        .sidebar ul li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 0.6rem;
            border-radius: 8px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        .sidebar ul li a:hover {
            background: #d32f2f08;
            text-decoration: none;
        }
        .sidebar ul li a i {
            color: #d32f2f;
            width: 1.1rem;
            font-size: 0.8rem;
        }
        .comment-list {
            margin: 1.5rem 0;
            border-top: 1px solid #eee;
            padding-top: 1rem;
        }
        .comment-item {
            padding: 1rem 0;
            border-bottom: 1px solid #f0f0f0;
        }
        .comment-item .meta {
            font-size: 0.8rem;
            color: #6a6a7e;
            display: flex;
            gap: 0.8rem;
            align-items: center;
        }
        .comment-item .meta .stars {
            color: #f1c40f;
            font-size: 0.85rem;
        }
        .comment-item p {
            margin: 0.3rem 0 0;
            font-size: 0.95rem;
        }