* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', 'Noto Sans', sans-serif;
            background: #fefaf5;
            color: #2c2418;
            line-height: 1.45;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* 头部导航 */
        .header {
            background: rgba(255, 250, 240, 0.92);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(235, 205, 167, 0.5);
        }
        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0.9rem 0;
        }
        .logo a {
            font-size: 1.7rem;
            font-weight: 800;
            background: linear-gradient(135deg, #e09d5e, #c2742c);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            text-decoration: none;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 600;
            color: #7d6444;
            transition: 0.2s;
        }
        .nav-links a:hover { color: #e08e3a; }
        /* 页面头部 */
        .hero-faq {
            text-align: center;
            padding: 2rem 0 1rem;
        }
        .hero-faq h1 {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(125deg, #b86f2e, #e7a15f);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 0.5rem;
        }
        .hero-faq p {
            font-size: 1.2rem;
            color: #9b7f5c;
            max-width: 680px;
            margin: 0 auto;
        }
        /* 错误速查卡片（创意排版） */
        .error-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            margin: 2rem 0 1.5rem;
        }
        .error-tag {
            background: white;
            border-radius: 60px;
            padding: 0.4rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: #c28441;
            border: 1px solid #ffe0c2;
            transition: 0.1s;
            cursor: pointer;
        }
        .error-tag:hover {
            background: #fff0dc;
            transform: translateY(-2px);
        }
        /* FAQ 主区域（双列创意） */
        .faq-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 2rem 0 2rem;
        }
        .faq-categories {
            flex: 0 0 260px;
        }
        .cat-card {
            background: #fffff7;
            border-radius: 1.8rem;
            padding: 1.2rem;
            border: 1px solid #ffe5ca;
            position: sticky;
            top: 100px;
        }
        .cat-card h3 {
            font-size: 1.2rem;
            color: #c28441;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .cat-buttons {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .cat-btn {
            background: none;
            border: none;
            text-align: left;
            padding: 0.5rem 0.8rem;
            font-weight: 600;
            color: #8b7654;
            border-radius: 1rem;
            cursor: pointer;
            transition: 0.2s;
            font-family: inherit;
        }
        .cat-btn.active, .cat-btn:hover {
            background: #f5cf9b;
            color: #a2692a;
        }
        .faq-list {
            flex: 1;
            min-width: 260px;
        }
        .faq-item {
            background: white;
            border-radius: 1.5rem;
            margin-bottom: 1rem;
            border: 1px solid #ffe5ca;
            overflow: hidden;
            transition: 0.1s;
        }
        .faq-question {
            padding: 1rem 1.2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 700;
            color: #bc7a3c;
        }
        .faq-question span:first-child { flex: 1; }
        .faq-answer {
            padding: 0 1.2rem 1rem 1.2rem;
            border-top: 1px solid #ffefdb;
            color: #7d6649;
            font-size: 0.9rem;
            line-height: 1.5;
            display: none;
        }
        .faq-answer.show { display: block; }
        .faq-answer code {
            background: #fff0dc;
            padding: 0.1rem 0.3rem;
            border-radius: 8px;
            font-size: 0.8rem;
        }
        /* 下载号召区域 (CTA) */
        .cta-download {
            background: linear-gradient(125deg, #fff2e2, #ffebd5);
            border-radius: 2rem;
            padding: 2rem;
            text-align: center;
            margin: 2rem 0 3rem;
            border: 1px solid #ffdfbe;
        }
        .btn-download {
            background: #e6a157;
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            display: inline-block;
            transition: 0.2s;
            margin-top: 0.8rem;
            box-shadow: 0 4px 12px rgba(200, 110, 30, 0.2);
        }
        .btn-download:hover { background: #ce8742; transform: scale(0.97); }
        /* 页脚 */
        .footer {
            border-top: 1px solid #ffefdb;
            background: #fffaf2;
            padding: 2rem 0;
            margin-top: 1rem;
            text-align: center;
            color: #b48a5a;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            flex-wrap: wrap;
            margin-bottom: 1rem;
        }
        .footer-links a { text-decoration: none; color: #ba8b4a; }
        .footer-links a:hover { color: #d98f3a; }
        @media (max-width: 780px) {
            .hero-faq h1 { font-size: 2rem; }
            .faq-wrapper { flex-direction: column; }
            .cat-card { position: static; }
            .nav { flex-direction: column; gap: 0.8rem; }
        }