* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f5f5f5;
    color: #222;
    font-family:
            -apple-system,
            BlinkMacSystemFont,
            "PingFang SC",
            "Microsoft YaHei",
            sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

.page {
    width: min(100%, 760px);
    margin: 0 auto;
    padding-bottom: 100px;
    background: #fff;
    min-height: 100vh;
}

.header {
    padding: 18px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-size: 24px;
    font-weight: 700;
}

.breadcrumb {
    padding: 14px 18px;
    color: #777;
    font-size: 13px;
}

.hero img {
    width: 100%;
    display: block;
}

.section {
    padding: 20px 18px;
}

h1 {
    font-size: 27px;
    line-height: 1.45;
    margin: 0 0 16px;
}

h2 {
    font-size: 21px;
    margin: 20px 0 14px;
}

h3 {
    font-size: 17px;
    line-height: 1.6;
}

p,
li {
    font-size: 16px;
    line-height: 1.85;
}

.price {
    font-size: 26px;
    font-weight: 700;
    margin: 12px 0;
}

.old-price {
    margin-left: 10px;
    font-size: 14px;
    font-weight: 400;
    color: #999;
    text-decoration: line-through;
}

.sku-list {
    display: grid;
    gap: 12px;
}

.sku-card {
    padding: 14px;
    border-radius: 12px;
    background: #f7f7f7;
}

.sku-name {
    font-weight: 700;
    margin-bottom: 6px;
}

.rich-content img {
    max-width: 100% !important;
    height: auto !important;
}

.faq-item {
    padding: 14px 0;
    border-bottom: 1px solid #eee;
}

.bottom-bar {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(100%, 760px);
    padding: 10px 14px;
    background: #fff;
    border-top: 1px solid #eee;
}

.book-button {
    height: 50px;
    border-radius: 25px;
    background: #111;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}
.related-list {
    display: grid;
    gap: 10px;
}

.related-card {
    display: block;
    padding: 14px;
    background: #f7f7f7;
    border-radius: 10px;
    line-height: 1.6;
}

.goods-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.goods-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px;
    background: #f7f7f7;
    border-radius: 12px;
}

.goods-card img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 10px;
}

.goods-card strong {
    line-height: 1.5;
}

.goods-card span {
    font-weight: 700;
}