*, *::before, *::after {
            box-sizing: border-box;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #f6f8fa;
            color: #1a202c;
            line-height: 1.65;
            letter-spacing: 0.02em;
        }

        /* 导航栏：与首页完全一致 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 76px;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            z-index: 1000;
            display: flex;
            align-items: center;
        }
        .nav-container {
            width: 100%;
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 14px;
            text-decoration: none;
        }
        .nav-logo img {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            object-fit: cover;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        .nav-logo-text {
            font-size: 24px;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: -0.03em;
        }
        .nav-badge {
            background-color: #f0fdf4;
            color: #16a34a;
            font-size: 11px;
            padding: 4px 10px;
            border-radius: 20px;
            font-weight: 600;
            border: 1px solid #bbf7d0;
        }
        .nav-links {
            display: flex;
            gap: 40px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            text-decoration: none;
            color: #4a5568;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            padding: 6px 0;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #2563eb;
            transition: width 0.2s ease;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: #2563eb;
        }

        /* 页面头部 */
        .faq-header {
            padding: 160px 24px 60px 24px;
            max-width: 1320px;
            margin: 0 auto;
            text-align: center;
        }
        .faq-header h1 {
            font-size: 42px;
            font-weight: 900;
            color: #0f172a;
            letter-spacing: -0.04em;
            margin: 0 0 20px 0;
            line-height: 1.3;
        }
        .faq-header p {
            font-size: 18px;
            color: #475569;
            max-width: 720px;
            margin: 0 auto;
        }

        /* 快速导航卡片区（创意分类） */
        .faq-quick-nav {
            max-width: 1000px;
            margin: 0 auto 80px auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .quick-nav-card {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 20px;
            padding: 28px 16px;
            text-align: center;
            text-decoration: none;
            color: #0f172a;
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
        }
        .quick-nav-card:hover {
            border-color: #2563eb;
            background: #f8fafc;
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(0,0,0,0.03);
        }
        .quick-nav-icon {
            font-size: 32px;
        }
        .quick-nav-card span:last-child {
            font-weight: 700;
            font-size: 15px;
        }

        /* 折叠问题列表 */
        .faq-container {
            max-width: 900px;
            margin: 0 auto 120px auto;
            padding: 0 24px;
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 20px;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: 0 4px 6px rgba(0,0,0,0.01);
            transition: all 0.2s ease;
        }
        .faq-item:hover {
            border-color: #cbd5e1;
        }
        .faq-question {
            padding: 24px 32px;
            font-size: 18px;
            font-weight: 700;
            color: #0f172a;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }
        .faq-question::after {
            content: '+';
            font-size: 22px;
            color: #64748b;
            font-weight: 400;
            transition: transform 0.2s ease;
        }
        .faq-item.active .faq-question {
            color: #2563eb;
        }
        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
            color: #2563eb;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            background-color: #fdfeff;
        }
        .faq-item.active .faq-answer {
            max-height: 2000px;
            border-top: 1px solid #f1f5f9;
        }
        .faq-answer-content {
            padding: 32px;
            font-size: 16px;
            color: #334155;
            line-height: 1.75;
            text-align: justify;
        }
        .faq-answer-content p {
            margin: 0 0 16px 0;
        }
        .faq-answer-content p:last-child {
            margin: 0;
        }
        .faq-answer-content ul {
            margin: 0 0 16px 0;
            padding-left: 20px;
        }
        .faq-answer-content li {
            margin-bottom: 8px;
        }
        .code-inline {
            background: #f1f5f9;
            color: #0f172a;
            padding: 3px 8px;
            border-radius: 6px;
            font-family: 'SF Mono', Consolas, monospace;
            font-size: 14px;
            font-weight: 600;
        }
        .highlight-box {
            background: #eff6ff;
            border-left: 4px solid #3b82f6;
            padding: 18px 24px;
            border-radius: 0 12px 12px 0;
            margin: 16px 0;
        }

        /* 底部联系提示 */
        .contact-prompt {
            max-width: 700px;
            margin: 0 auto 80px auto;
            text-align: center;
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 24px;
            padding: 40px;
        }
        .contact-prompt h3 {
            font-size: 24px;
            font-weight: 800;
            margin-top: 0;
            margin-bottom: 12px;
        }
        .contact-prompt p {
            color: #4a5568;
            margin-bottom: 24px;
        }
        .btn-primary {
            background-color: #2563eb;
            color: #ffffff;
            text-decoration: none;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            display: inline-block;
            transition: background 0.2s;
        }
        .btn-primary:hover {
            background-color: #1d4ed8;
        }

        /* 页脚：与首页一致 */
        .footer {
            background-color: #0b0f19;
            color: #94a3b8;
            padding: 80px 24px 40px 24px;
            font-size: 14px;
            border-top: 1px solid #1e293b;
        }
        .footer-inner {
            max-width: 1272px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1.6fr repeat(3, 1fr);
            gap: 60px;
            margin-bottom: 60px;
        }
        .footer-brand h4 {
            color: #ffffff;
            font-size: 20px;
            font-weight: 800;
            margin: 0 0 20px 0;
            letter-spacing: -0.02em;
        }
        .footer-brand p {
            line-height: 1.7;
            margin: 0;
            font-size: 14px;
            color: #64748b;
        }
        .footer-col h5 {
            color: #ffffff;
            font-size: 16px;
            font-weight: 700;
            margin: 0 0 20px 0;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer-col ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.15s ease;
            font-weight: 500;
        }
        .footer-col ul li a:hover {
            color: #ffffff;
        }
        .footer-bottom {
            max-width: 1272px;
            margin: 0 auto;
            padding-top: 36px;
            border-top: 1px solid #1e293b;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 24px;
            color: #475569;
            font-weight: 500;
        }

        /* 响应式 */
        @media (max-width: 768px) {
            .nav-container {
                padding: 0 12px;
            }
            .nav-links {
                display: none;
            }
            .faq-header {
                padding-top: 130px;
                padding-left: 16px;
                padding-right: 16px;
            }
            .faq-header h1 {
                font-size: 32px;
            }
            .faq-quick-nav {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
                padding: 0 16px;
            }
            .faq-container {
                padding: 0 16px;
            }
            .faq-question {
                padding: 20px 24px;
                font-size: 16px;
            }
            .faq-answer-content {
                padding: 24px;
            }
            .contact-prompt {
                margin: 0 16px 60px;
                padding: 28px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }