* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background: #f7f8fa;
}

.container {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 16px;
}

.site-header,
.site-footer {
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
}

.site-footer {
    border-top: 1px solid #e5e7eb;
    border-bottom: none;
    margin-top: 32px;
}

.site-header .container,
.site-footer .container {
    padding-top: 14px;
    padding-bottom: 14px;
}

.brand {
    font-size: 20px;
    font-weight: 700;
}

.hero {
    padding: 48px 0 32px;
    background: #ffffff;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 32px;
    line-height: 1.2;
}

.hero p {
    margin: 0;
    color: #4b5563;
    font-size: 16px;
}

.section {
    padding: 32px 0;
}

.section.alt {
    background: #ffffff;
}

.section h2 {
    margin: 0 0 20px;
    font-size: 24px;
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.card,
.faq-item {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 16px;
}

.alt .card,
.alt .faq-item {
    background: #f9fafb;
}

.card h3,
.faq-item h3 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 18px;
}

.card p,
.faq-item p {
    margin: 0;
    color: #4b5563;
}

.faq-list {
    display: grid;
    gap: 16px;
}

@media (min-width: 768px) {
    .hero {
        padding: 72px 0 48px;
    }

    .hero h1 {
        font-size: 42px;
    }

    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}