* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.6;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .highlight {
            color: #6c5ce7;
        }

        /* 导航 (与全站一致) */
        header {
            background: #0f0f1a;
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid #2a2a3e;
        }
        .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .logo {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo svg {
            width: 32px;
            height: 32px;
            color: #6c5ce7;
            flex-shrink: 0;
        }
        .logo span {
            color: #6c5ce7;
        }
        .logo small {
            font-size: 14px;
            font-weight: 400;
            color: #a0a0b8;
            margin-left: 8px;
            letter-spacing: 0.5px;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
        }
        nav a {
            font-size: 15px;
            color: #c8c8e0;
            transition: color 0.2s;
            position: relative;
        }
        nav a:hover {
            color: #fff;
        }
        nav a.active {
            color: #6c5ce7;
            font-weight: 600;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 4px;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: #c8c8e0;
            border-radius: 2px;
            transition: 0.2s;
        }

        /* 面包屑 */
        .breadcrumb {
            padding: 18px 0 6px;
            background: #f5f7fa;
            font-size: 14px;
            color: #8888aa;
        }
        .breadcrumb .container {
            max-width: 1200px;
        }
        .breadcrumb a {
            color: #6c5ce7;
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: #5a4bd1;
            text-decoration: underline;
        }
        .breadcrumb span {
            margin: 0 6px;
        }

        /* Hero (与首页/下载页/探索页统一：深色渐变背景) */
        .faq-hero {
            padding: 60px 0 50px;
            background: linear-gradient(145deg, #0f0f1a 0%, #1a1a30 100%);
            color: #fff;
            border-bottom: 1px solid #2a2a3e;
            text-align: center;
        }
        .faq-hero h1 {
            font-size: 40px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .faq-hero h1 .highlight {
            color: #6c5ce7;
        }
        .faq-hero p {
            font-size: 18px;
            color: #b0b0ca;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 分类导航 */
        .faq-categories {
            padding: 30px 0 10px;
            background: #f5f7fa;
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 900px;
            margin: 0 auto;
        }
        .category-item {
            background: #fff;
            border-radius: 16px;
            padding: 22px 16px;
            text-align: center;
            border: 1px solid #eaeaef;
            transition: border-color 0.2s, transform 0.2s;
        }
        .category-item:hover {
            border-color: #6c5ce7;
            transform: translateY(-2px);
        }
        .category-item .icon {
            font-size: 28px;
            margin-bottom: 8px;
        }
        .category-item h3 {
            font-size: 16px;
            font-weight: 700;
        }

        /* FAQ列表 */
        .faq-list {
            padding: 40px 0 70px;
            background: #fff;
        }
        .faq-section {
            margin-bottom: 40px;
        }
        .faq-section h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid #6c5ce7;
            display: inline-block;
        }
        .faq-item {
            border-bottom: 1px solid #eaeaef;
            padding: 24px 0;
        }
        .faq-item:first-of-type {
            border-top: 1px solid #eaeaef;
        }
        .faq-item .question {
            font-size: 19px;
            font-weight: 700;
            color: #1a1a2e;
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }
        .faq-item .question .qmark {
            color: #6c5ce7;
            font-size: 24px;
            flex-shrink: 0;
            line-height: 1.4;
        }
        .faq-item .answer {
            font-size: 17px;
            color: #44445e;
            padding-left: 38px;
            margin-top: 8px;
            line-height: 1.8;
        }
        .faq-item .answer a {
            color: #6c5ce7;
            font-weight: 500;
        }
        .faq-item .answer a:hover {
            text-decoration: underline;
        }

        /* 更多帮助 */
        .faq-more {
            padding: 30px 0 60px;
            background: #f5f7fa;
            text-align: center;
            border-top: 1px solid #eaeaef;
        }
        .faq-more h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .faq-more p {
            color: #666688;
            font-size: 17px;
            margin-bottom: 20px;
        }
        .faq-more .btn-primary {
            display: inline-block;
            background: #6c5ce7;
            color: #fff;
            padding: 12px 36px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 16px;
            transition: background 0.25s;
        }
        .faq-more .btn-primary:hover {
            background: #5a4bd1;
        }

        /* Footer (与探索页一致) */
        footer {
            background: #0a0a14;
            color: #8888aa;
            padding: 40px 0 30px;
            border-top: 1px solid #1a1a2e;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .logo {
            font-size: 22px;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            max-width: 260px;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: #e0e0f0;
            font-size: 16px;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: #8888aa;
            margin-bottom: 8px;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            max-width: 1200px;
            margin: 30px auto 0;
            padding: 20px 24px 0;
            border-top: 1px solid #1a1a2e;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
        }

        /* 响应式 */
        @media (max-width: 900px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
                padding: 0 16px;
            }
        }
        @media (max-width: 768px) {
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
                padding: 16px 0 8px;
                border-top: 1px solid #2a2a3e;
                margin-top: 12px;
            }
            nav.open {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .faq-hero h1 {
                font-size: 30px;
            }
            .faq-item .question {
                font-size: 17px;
            }
            .faq-item .answer {
                font-size: 16px;
                padding-left: 34px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .faq-hero {
                padding: 40px 0 30px;
            }
            .faq-hero h1 {
                font-size: 26px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .faq-item .question .qmark {
                font-size: 20px;
            }
            .faq-item .answer {
                padding-left: 28px;
            }
        }