*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a2a44;
            --primary-light: #2c3e6b;
            --accent: #e8a838;
            --accent-hover: #d4942e;
            --bg: #f6f4f0;
            --card-bg: #ffffff;
            --text: #1e1e2a;
            --text-light: #555;
            --border: #ddd;
            --radius: 12px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --transition: 0.25s ease;
            --max-width: 1200px;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--primary);
            color: #fff;
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px 20px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--accent);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .navbar {
            display: flex;
            gap: 18px;
            align-items: center;
            flex-wrap: wrap;
        }
        .navbar a {
            color: rgba(255, 255, 255, 0.88);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background var(--transition), color var(--transition);
        }
        .navbar a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
            text-decoration: none;
        }
        .navbar a i {
            margin-right: 5px;
        }
        .breadcrumb {
            background: #fff;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.88rem;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            align-items: center;
        }
        .breadcrumb ul li+li::before {
            content: "›";
            margin-right: 12px;
            color: #aaa;
            font-size: 1.2rem;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb .current {
            color: var(--text-light);
            font-weight: 500;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .sidebar {
                position: static;
            }
            .navbar {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.15);
            }
            .navbar.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
        }
        .section-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            margin-bottom: 32px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .section-card h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 18px;
            border-left: 5px solid var(--accent);
            padding-left: 16px;
        }
        .section-card h3 {
            font-size: 1.35rem;
            color: var(--primary-light);
            margin: 28px 0 12px;
        }
        .section-card h4 {
            font-size: 1.1rem;
            color: var(--text);
            font-weight: 600;
            margin: 20px 0 8px;
        }
        .section-card p {
            margin-bottom: 16px;
            color: var(--text);
        }
        .section-card ul,
        .section-card ol {
            margin: 12px 0 18px 24px;
        }
        .section-card li {
            margin-bottom: 8px;
        }
        .highlight-box {
            background: #fef9ed;
            border-left: 5px solid var(--accent);
            padding: 18px 22px;
            border-radius: 8px;
            margin: 20px 0;
        }
        .highlight-box strong {
            color: var(--primary);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 18px;
            margin: 20px 0;
        }
        .feature-item {
            background: #f9f7f4;
            padding: 18px 16px;
            border-radius: 10px;
            text-align: center;
            border: 1px solid #eee;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
        }
        .feature-item i {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 10px;
        }
        .feature-item h4 {
            margin: 6px 0 4px;
            font-size: 1.1rem;
        }
        .feature-item p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin: 0;
        }
        .sidebar-module {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 20px;
            margin-bottom: 24px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .sidebar-module h3 {
            font-size: 1.2rem;
            color: var(--primary);
            margin-bottom: 14px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
        }
        .sidebar-module ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-module li {
            padding: 8px 0;
            border-bottom: 1px solid #f0eee9;
        }
        .sidebar-module li:last-child {
            border-bottom: none;
        }
        .sidebar-module li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-module li a i {
            color: var(--accent);
            font-size: 0.85rem;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            font-family: var(--font);
            background: #fff;
            transition: border var(--transition), box-shadow var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(232, 168, 56, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 28px;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            background: var(--primary);
            color: #fff;
        }
        .btn:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e1e2a;
        }
        .btn-accent:hover {
            background: var(--accent-hover);
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ddd;
            transition: color var(--transition);
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--accent);
        }
        .comment-list {
            margin-top: 20px;
        }
        .comment-item {
            padding: 14px 0;
            border-bottom: 1px solid #f0eee9;
        }
        .comment-item:last-child {
            border-bottom: none;
        }
        .comment-item .meta {
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            gap: 12px;
            align-items: center;
        }
        .comment-item .meta .stars {
            color: var(--accent);
            font-size: 0.9rem;
        }
        .featured-image {
            margin: 24px 0;
            border-radius: var(--radius);
            overflow: hidden;
            background: #eee;
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 10px 16px;
            font-size: 0.88rem;
            color: var(--text-light);
            background: #f9f7f4;
            border-top: 1px solid var(--border);
        }
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 12px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 6px;
            display: inline-block;
        }
        .footer-inner a {
            color: rgba(255, 255, 255, 0.75);
            display: block;
            padding: 4px 0;
            font-size: 0.92rem;
        }
        .footer-inner a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            text-align: center;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom .copyright {
            font-weight: 400;
        }
        friend-link {
            display: block;
            margin-top: 8px;
        }
        friend-link a {
            display: inline-block;
            margin: 0 6px 4px 0;
            padding: 2px 10px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            font-size: 0.85rem;
        }
        friend-link a:hover {
            background: var(--accent);
            color: #1e1e2a;
            text-decoration: none;
        }
        @media (max-width: 600px) {
            .section-card {
                padding: 20px 16px;
            }
            .section-card h2 {
                font-size: 1.4rem;
                padding-left: 12px;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.3rem;
            }
            .header-inner {
                padding: 0 12px;
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
            }
            .star-rating {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 400px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb ul {
                font-size: 0.78rem;
                gap: 4px 8px;
            }
        }
        .last-update {
            display: inline-block;
            background: #f0ede8;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .toc {
            background: #f9f7f4;
            border-radius: 8px;
            padding: 18px 22px;
            margin: 20px 0;
        }
        .toc ol {
            margin: 8px 0 0 20px;
        }
        .toc a {
            color: var(--primary-light);
        }
        .tag {
            display: inline-block;
            background: var(--accent);
            color: #1e1e2a;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-right: 6px;
        }
        .faq-item {
            padding: 14px 0;
            border-bottom: 1px solid #f0eee9;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-item strong {
            display: block;
            font-size: 1.05rem;
            color: var(--primary);
            margin-bottom: 4px;
        }