* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }
        body {
            color: #333;
            line-height: 1.6;
            background: #fff;
        }
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 5%;
            background: #fff;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo img {
            height: 32px;
            width: 32px;
            object-fit: contain;
            display: block;
        }
        .logo span {
            font-size: 1.25rem;
            font-weight: 600;
            color: #165DFF;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-right {
            display: flex;
            gap: 2rem;
            align-items: center;
        }
        .nav-right a {
            text-decoration: none;
            color: #333;
            font-size: 0.95rem;
            transition: color 0.2s;
        }
        .nav-right a:hover {
            color: #165DFF;
        }
        .nav-right a.active {
            color: #165DFF;
            font-weight: 500;
        }
        .lang-switch {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            cursor: pointer;
            font-size: 0.95rem;
        }
        .page-header {
            padding: 3rem 5%;
            text-align: center;
            background: linear-gradient(135deg, #fff 0%, #f0f7ff 100%);
        }
        .page-header h1 {
            font-size: 2.2rem;
            color: #1D2129;
            margin-bottom: 0.8rem;
        }
        .page-header p {
            font-size: 1.05rem;
            color: #4E5969;
            max-width: 700px;
            margin: 0 auto;
        }
        .faq-container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 3rem 5%;
        }
        .faq-section {
            margin-bottom: 3.5rem;
        }
        .faq-section h2 {
            font-size: 1.5rem;
            color: #165DFF;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #f2f2f2;
        }
        .faq-item {
            margin-bottom: 1rem;
            border-radius: 8px;
            overflow: hidden;
            background: #fafbfc;
        }
        .faq-question {
            padding: 1rem 1.2rem;
            background: #fff;
            border: 1px solid #f2f2f2;
            font-weight: 500;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-question:hover {
            color: #165DFF;
            border-color: #e0e8ff;
        }
        .faq-question:focus-visible {
            color: #165DFF;
            border-color: #165DFF;
            outline: 2px solid rgba(22, 93, 255, 0.2);
            outline-offset: 2px;
        }
        .faq-answer {
            padding: 1rem 1.2rem;
            font-size: 0.95rem;
            color: #4E5969;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.active {
            display: block;
        }
        .faq-answer p {
            margin-bottom: 0.6rem;
        }
        .faq-answer ul {
            margin-left: 1.2rem;
            margin-bottom: 0.6rem;
        }
        .faq-answer li {
            margin-bottom: 0.3rem;
        }
        .highlight {
            color: #165DFF;
            font-weight: 500;
        }
        footer {
            padding: 2rem 5%;
            background: #1D2129;
            color: #fff;
            text-align: center;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 1rem;
        }
        .footer-links a {
            color: #C9CDD4;
            text-decoration: none;
            font-size: 0.9rem;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .copyright {
            font-size: 0.85rem;
            color: #86909C;
        }
        @media (max-width: 768px) {
            .page-header h1 {
                font-size: 1.7rem;
            }
            .nav-right a {
                display: none;
            }
            .nav-right a.active {
                display: inline;
            }
        }
        [lang="en"] .zh, [lang="zh-CN"] .en {
            display: none !important;
        }