*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #6c2bd9;
            --primary-dark: #4a1a9e;
            --secondary: #ff6b9d;
            --accent: #00d4aa;
            --bg: #f8f7fc;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --border: #e2ddf0;
            --shadow: 0 8px 30px rgba(108, 43, 217, 0.10);
            --radius: 16px;
            --radius-sm: 8px;
            --max-width: 1200px;
            --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--bg-card);
            border-bottom: 2px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            gap: 16px;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            font-size: 1.8rem;
            -webkit-text-fill-color: var(--primary);
            color: var(--primary);
        }
        .my-logo:hover {
            opacity: 0.85;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--border);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            list-style: none;
        }
        .nav-menu li a {
            padding: 8px 16px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-light);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-menu li a:hover,
        .nav-menu li a.active {
            background: var(--primary);
            color: #fff;
        }
        .breadcrumb {
            background: var(--bg-card);
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb ol li+li::before {
            content: "›";
            margin-right: 6px;
            color: var(--text-light);
            font-weight: 600;
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--text-light);
            font-weight: 500;
        }
        main {
            padding: 40px 0 60px;
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
        }
        .article-header h1 {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .article-header .meta {
            color: var(--text-light);
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .article-header .meta i {
            margin-right: 6px;
        }
        .last-updated {
            background: var(--accent);
            color: #fff;
            padding: 2px 14px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.85rem;
        }
        .featured-image {
            margin: 30px auto;
            max-width: 800px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media(max-width:960px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-top: 48px;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 4px solid var(--primary);
            display: inline-block;
            color: var(--primary-dark);
        }
        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--text);
        }
        .article-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 8px;
            color: var(--text-light);
        }
        .article-body p {
            margin-bottom: 18px;
            font-size: 1.05rem;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 8px;
            font-size: 1.02rem;
        }
        .article-body strong {
            color: var(--primary-dark);
        }
        .article-body .highlight-box {
            background: var(--bg-card);
            border-left: 6px solid var(--primary);
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .insight-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            margin: 28px 0;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .insight-card .card-label {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 4px;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .stat-item .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--primary-dark);
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            margin-bottom: 8px;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 0;
            font-size: 0.95rem;
        }
        .sidebar-card ul li a i {
            width: 18px;
            color: var(--primary);
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin: 20px 0;
        }
        .search-form input {
            flex: 1;
            padding: 12px 18px;
            border: 2px solid var(--border);
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border var(--transition);
            background: var(--bg-card);
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 12px 24px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
        }
        .search-form button:hover {
            background: var(--primary-dark);
        }
        .feedback-section {
            margin-top: 60px;
            border-top: 2px solid var(--border);
            padding-top: 40px;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        @media(max-width:700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .feedback-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-card textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-family: var(--font);
            resize: vertical;
            min-height: 100px;
            outline: none;
            transition: border var(--transition);
        }
        .feedback-card textarea:focus {
            border-color: var(--primary);
        }
        .feedback-card input[type="text"] {
            width: 100%;
            padding: 10px 14px;
            border: 2px solid var(--border);
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border var(--transition);
        }
        .feedback-card input[type="text"]:focus {
            border-color: var(--primary);
        }
        .feedback-card .btn-submit {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 10px 28px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
            margin-top: 8px;
        }
        .feedback-card .btn-submit:hover {
            background: var(--primary-dark);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            margin: 12px 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f9b826;
        }
        .site-footer {
            background: var(--text);
            color: #ccc;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 30px;
        }
        @media(max-width:700px) {
            .site-footer .container {
                grid-template-columns: 1fr;
            }
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 12px;
        }
        .site-footer a {
            color: #aaa;
        }
        .site-footer a:hover {
            color: var(--secondary);
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 6px;
        }
        .friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            margin-bottom: 6px;
            border-left: 3px solid var(--secondary);
            font-size: 0.95rem;
        }
        .friend-link a {
            color: #ddd;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .friend-link a:hover {
            color: var(--secondary);
        }
        .copyright {
            grid-column: 1/-1;
            text-align: center;
            padding-top: 24px;
            margin-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #888;
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--bg-card);
                padding: 12px 0;
                border-radius: var(--radius-sm);
                box-shadow: var(--shadow);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li a {
                padding: 10px 20px;
                width: 100%;
            }
            .header-inner {
                padding: 8px 0;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .article-body h2 {
                font-size: 1.6rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .site-footer .container {
                grid-template-columns: 1fr;
            }
        }
        @media(max-width:480px) {
            .article-header h1 {
                font-size: 1.6rem;
            }
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary);
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 20px rgba(108, 43, 217, 0.3);
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            z-index: 99;
            opacity: 0;
            visibility: hidden;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .scroll-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
        }