*,
        *::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, sans-serif;
            background: #f8f6f0;
            color: #1e1e2a;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #c4450c;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus-visible {
            color: #7a2b06;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #1a1a2e;
        }
        h1 {
            font-size: 2.2rem;
            margin: 0 0 0.6rem;
        }
        h2 {
            font-size: 1.7rem;
            margin: 2.4rem 0 0.8rem;
            border-bottom: 3px solid #e67e22;
            padding-bottom: 0.3rem;
        }
        h3 {
            font-size: 1.3rem;
            margin: 1.8rem 0 0.5rem;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.2rem 0 0.3rem;
            font-weight: 600;
            color: #2c3e50;
        }
        p {
            margin: 0 0 1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 0;
            background: #c4450c;
            color: #fff;
            padding: 0.6rem 1.2rem;
            z-index: 1000;
            font-weight: 600;
        }
        .skip-link:focus {
            top: 0;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
            padding: 0.6rem 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: 0.6rem 1rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #f39c12;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 6px rgba(243, 156, 18, 0.3);
            transition: transform 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #f1c40f;
        }
        .my-logo i {
            font-size: 1.6rem;
            color: #e67e22;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #f39c12;
            color: #f39c12;
            font-size: 1.5rem;
            padding: 0.3rem 0.7rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(243, 156, 18, 0.15);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid #f39c12;
            outline-offset: 2px;
        }
        .primary-nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .primary-nav a {
            color: #eee;
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .primary-nav a:hover,
        .primary-nav a:focus-visible {
            background: rgba(243, 156, 18, 0.25);
            color: #f1c40f;
            text-decoration: none;
        }
        .primary-nav a.active {
            background: #e67e22;
            color: #fff;
        }
        .breadcrumb {
            background: #f0ede6;
            padding: 0.5rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #ddd6cc;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.2rem;
            padding: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.4rem;
            color: #999;
        }
        .breadcrumb a {
            color: #7a2b06;
        }
        .breadcrumb .current {
            color: #555;
            font-weight: 500;
        }
        .main-content {
            flex: 1;
            padding: 2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            align-items: start;
        }
        @media(max-width:920px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: #fff;
            border-radius: 18px;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .article-body p,
        .article-body li {
            font-size: 1.05rem;
            color: #2c2c3a;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.2rem;
        }
        .article-body li {
            margin-bottom: 0.3rem;
        }
        .hero-img-wrap {
            margin: 1.6rem 0 2rem;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            background: #eae6de;
        }
        .hero-img-wrap img {
            width: 100%;
            aspect-ratio: 1200/630;
            object-fit: cover;
        }
        .img-caption {
            font-size: 0.8rem;
            color: #777;
            padding: 0.5rem 1rem;
            background: #f5f2eb;
            font-style: italic;
        }
        .update-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #e8f0fe;
            color: #1a3a6a;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 1rem;
        }
        .update-badge i {
            color: #2d6fc4;
        }
        .highlight-box {
            background: #fef9e7;
            border-left: 5px solid #e67e22;
            padding: 1.2rem 1.6rem;
            border-radius: 0 12px 12px 0;
            margin: 1.6rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .inline-link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.2rem;
            margin: 1.2rem 0;
            padding: 0;
            list-style: none;
        }
        .inline-link-list li a {
            background: #f5f2eb;
            padding: 0.2rem 1rem;
            border-radius: 30px;
            font-size: 0.9rem;
            border: 1px solid #ddd6cc;
            transition: background 0.2s, border-color 0.2s;
        }
        .inline-link-list li a:hover {
            background: #e67e22;
            color: #fff;
            border-color: #e67e22;
            text-decoration: none;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 1rem;
            margin: 1.6rem 0;
        }
        .stat-card {
            background: #f5f2eb;
            border-radius: 12px;
            padding: 1rem;
            text-align: center;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #c4450c;
            display: block;
        }
        .stat-card .label {
            font-size: 0.8rem;
            color: #666;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .faq-item {
            border-bottom: 1px solid #eee;
            padding: 1rem 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            font-weight: 700;
            font-size: 1.05rem;
            color: #1a1a2e;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .faq-question::before {
            content: "❓";
            font-size: 1.2rem;
        }
        .faq-answer {
            padding-left: 2rem;
            margin-top: 0.3rem;
            color: #444;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.4rem 1.6rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin: 0 0 0.8rem;
            border-bottom: 2px solid #e67e22;
            padding-bottom: 0.3rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            margin-bottom: 0.5rem;
        }
        .sidebar-card li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.3rem 0;
            font-size: 0.95rem;
            border-bottom: 1px solid #f0ede6;
        }
        .sidebar-card li a i {
            color: #e67e22;
            width: 1.2rem;
            text-align: center;
        }
        .sidebar-card li a:hover {
            padding-left: 0.3rem;
            text-decoration: none;
            color: #c4450c;
        }
        .search-form {
            display: flex;
            gap: 0.4rem;
            margin-top: 0.3rem;
        }
        .search-form input[type="search"] {
            flex: 1;
            padding: 0.6rem 1rem;
            border: 2px solid #ddd6cc;
            border-radius: 30px;
            font-size: 0.9rem;
            background: #faf9f6;
            transition: border-color 0.2s;
        }
        .search-form input[type="search"]:focus {
            border-color: #e67e22;
            outline: none;
        }
        .search-form button {
            background: #e67e22;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .search-form button:hover {
            background: #c4450c;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
            margin: 2rem 0 0.5rem;
        }
        @media(max-width:700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #fcfaf7;
            border-radius: 14px;
            padding: 1.4rem 1.6rem;
            border: 1px solid #ede9e1;
        }
        .feedback-card h3 {
            margin: 0 0 0.8rem;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .feedback-card label {
            font-weight: 600;
            font-size: 0.85rem;
            color: #444;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.5rem 0.8rem;
            border: 2px solid #ddd6cc;
            border-radius: 8px;
            font-size: 0.9rem;
            background: #fff;
            transition: border-color 0.2s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #e67e22;
            outline: none;
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            background: #1a1a2e;
            color: #fff;
            border: none;
            padding: 0.6rem 1.2rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
        }
        .feedback-card .btn-submit:hover {
            background: #2c3e50;
        }
        .site-footer {
            background: #1a1a2e;
            color: #ccc;
            padding: 2.5rem 0 1.2rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 2rem;
        }
        .footer-col h4 {
            color: #f39c12;
            margin: 0 0 0.8rem;
            font-size: 1rem;
            font-weight: 700;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col li {
            margin-bottom: 0.3rem;
        }
        .footer-col a {
            color: #bbb;
            font-size: 0.9rem;
        }
        .footer-col a:hover {
            color: #f1c40f;
        }
        friend-link {
            display: block;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        friend-link a {
            color: #e67e22;
        }
        friend-link a:hover {
            color: #f1c40f;
        }
        .footer-bottom {
            margin-top: 2rem;
            padding-top: 1.2rem;
            border-top: 1px solid #2c2c4a;
            text-align: center;
            font-size: 0.8rem;
            color: #999;
        }
        .footer-bottom a {
            color: #e67e22;
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: inline-block;
            }
            .primary-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #1a1a2e;
                padding: 0.6rem 0 1rem;
                border-radius: 0 0 12px 12px;
                gap: 0.2rem;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 0.5rem 1rem;
                border-radius: 0;
                border-bottom: 1px solid #2c2c4a;
            }
            .article-body {
                padding: 1.2rem 1rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .header-inner {
                padding: 0 0.2rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        @media(max-width:480px) {
            .container {
                padding: 0 0.8rem;
            }
            .article-body {
                padding: 0.8rem 0.8rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            .site-header {
                position: static;
                background: #fff;
                color: #000;
            }
            .nav-toggle {
                display: none;
            }
            .primary-nav {
                display: flex;
            }
            .sidebar {
                display: none;
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            .site-footer {
                background: #fff;
                color: #000;
                border-top: 2px solid #ccc;
            }
            .feedback-grid {
                break-inside: avoid;
            }
        }