:root {
            /* 品牌主色调 */
            --primary-color: #091344;
            --primary-light: rgba(9, 19, 68, 0.1);
            --primary-glow: rgba(9, 19, 68, 0.4);
            
            --bg-color: #f8f9fa;
            --text-main: #333333;
            --text-muted: #666666;
            --border-color: #e5e7eb;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            line-height: 1.6;
            margin: 0;
            padding: 40px 20px;
        }

        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .faq-header h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 10px;
            font-weight: 600;
        }

        .faq-header p {
            color: var(--text-muted);
        }

        /* FAQ Item Card */
        .faq-item {
            background: #ffffff;
            border-radius: 12px;
            margin-bottom: 16px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: all 0.4s ease;
        }

        /* 默认悬浮效果 */
        .faq-item:hover {
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        }

        /* 激活状态 - 呼吸光特效 */
        .faq-item.active {
            border-color: var(--primary-color);
            transform: translateY(0);
            animation: breatheLight 3s infinite ease-in-out;
            z-index: 10;
            position: relative;
        }

        @keyframes breatheLight {
            0% { box-shadow: 0 0 5px var(--primary-light); }
            50% { box-shadow: 0 0 15px var(--primary-glow); }
            100% { box-shadow: 0 0 5px var(--primary-light); }
        }

        /* Question Button */
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            background: none;
            border: none;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-main);
            cursor: pointer;
            transition: color 0.3s ease;
            font-family: inherit;
        }

        .faq-item.active .faq-question {
            color: var(--primary-color);
            font-weight: 600;
        }

        /* 展开/折叠 图标 */
        .icon {
            position: relative;
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            margin-left: 15px;
        }

        .icon::before, .icon::after {
            content: '';
            position: absolute;
            background-color: var(--text-muted);
            transition: transform 0.3s ease, background-color 0.3s ease;
            border-radius: 2px;
        }

        /* 横线 */
        .icon::before {
            top: 11px;
            left: 4px;
            width: 16px;
            height: 2px;
        }

        /* 竖线 */
        .icon::after {
            top: 4px;
            left: 11px;
            width: 2px;
            height: 16px;
        }

        /* 激活状态的图标变化 */
        .faq-item.active .icon::before,
        .faq-item.active .icon::after {
            background-color: var(--primary-color);
        }

        .faq-item.active .icon::after {
            transform: rotate(90deg);
        }

        /* Answer Section */
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            background-color: #fafafa;
        }

        .answer-content {
            padding: 0 24px 24px 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            border-top: 1px solid transparent;
        }

        .faq-item.active .answer-content {
            border-top: 1px solid var(--primary-light);
            padding-top: 20px;
        }