* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            background: #f8fafc;
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            line-height: 1.5;
            color: #0f172a;
            padding: 2rem 1rem;
        }

        .faq-container {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            border-radius: 1.5rem;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
            overflow: hidden;
            padding: 1.5rem 1.25rem;
        }

        .faq-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .faq-header h1 {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, #2563eb, #1e40af);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
        }

        .faq-header p {
            color: #475569;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }

        /* 分组样式 */
        .faq-group {
            margin-bottom: 2rem;
            border-bottom: 1px solid #e2e8f0;
            padding-bottom: 1.25rem;
        }

        .faq-group:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .group-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 1rem;
            padding-left: 0.5rem;
            border-left: 4px solid #3b82f6;
            letter-spacing: -0.2px;
        }

        /* 单个FAQ项 */
        .faq-item {
            background: #ffffff;
            border-radius: 1rem;
            margin-bottom: 0.75rem;
            border: 1px solid #eef2ff;
            transition: all 0.15s ease;
        }

        .faq-item:hover {
            border-color: #cbd5e1;
            background: #fefefe;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            background: none;
            border: none;
            padding: 1rem 1.25rem;
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            color: #0f172a;
            cursor: pointer;
            border-radius: 1rem;
            transition: background 0.2s;
            font-family: inherit;
        }

        .faq-question:focus-visible {
            outline: 2px solid #3b82f6;
            outline-offset: 2px;
            border-radius: 0.75rem;
        }

        .faq-question:hover {
            background: #f1f5f9;
        }

        .question-text {
            flex: 1;
            padding-right: 1rem;
        }

        .icon {
            font-size: 1.25rem;
            font-weight: 400;
            color: #3b82f6;
            transition: transform 0.25s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: #eff6ff;
            line-height: 1;
        }

        .faq-item.active .icon {
            transform: rotate(180deg);
            background: #dbeafe;
        }

        .faq-answer {
            display: none;
            padding: 0 1.25rem 1.25rem 1.25rem;
            border-top: 1px solid #f1f5f9;
            color: #334155;
            font-size: 0.92rem;
            line-height: 1.55;
            background: #fefefe;
            border-radius: 0 0 1rem 1rem;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        .faq-answer p {
            margin-top: 0.75rem;
            margin-bottom: 0.5rem;
        }

        .faq-answer p:first-child {
            margin-top: 1rem;
        }

        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* 小贴士样式：让答案中的强调自然 */
        .highlight {
            background: #eef2ff;
            padding: 0.1rem 0.3rem;
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #1e40af;
        }

        hr {
            margin: 1.5rem 0 1rem;
            border: none;
            border-top: 1px solid #e2e8f0;
        }

        /* 移动端优化 */
        @media (max-width: 640px) {
            .faq-container {
                padding: 1rem;
            }
            .faq-question {
                padding: 0.85rem 1rem;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 1rem 1rem 1rem;
                font-size: 0.88rem;
            }
            .group-title {
                font-size: 1.1rem;
            }
        }