* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; max-width: 780px; margin: 0 auto; padding: 0 20px 48px; line-height: 1.85; color: #222; font-size: 17px; background: #eef2f7; }
body.home { max-width: 1080px; }
header { border-bottom: 2px solid #222; padding: 24px 0 16px; margin-bottom: 24px; }
header .sitename { font-size: 26px; font-weight: 700; margin: 0; }
header .tagline { color: #555; margin: 8px 0 0; font-size: 15px; }
nav { margin: 0 0 28px; font-size: 16px; }
nav a { margin-right: 18px; color: #1466cc; }
h1 { font-size: 26px; line-height: 1.4; }
h2 { font-size: 21px; margin-top: 36px; border-left: 4px solid #222; padding-left: 12px; }
h3 { font-size: 18px; margin-top: 24px; }
a { color: #1466cc; }
.card { background: #fff; border: 1px solid #e2e8f0; border-radius: 20px; padding: 18px 20px; margin: 14px 0; box-shadow: 0 2px 12px rgba(15, 40, 80, 0.08); }
.card h3 { margin-top: 0; }
.card p { margin: 6px 0; }
.meta { color: #666; font-size: 14px; }
.note { background: #fff; border: 1px solid #e2e8f0; border-radius: 20px; padding: 16px 18px; font-size: 15px; box-shadow: 0 2px 12px rgba(15, 40, 80, 0.08); }
.warn { background: #fff8e6; border: 1px solid #e6c87a; border-radius: 20px; padding: 16px 18px; font-size: 15px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 12px 0; }
th, td { border: 1px solid #ccc; padding: 8px 10px; text-align: left; vertical-align: top; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid #ddd; color: #777; font-size: 14px; }
@media (max-width: 600px) { body { font-size: 16px; } header .sitename { font-size: 22px; } }
.badge { display: inline-block; background: #0a2a5e; color: #fff; border-radius: 20px; padding: 2px 12px; font-size: 13px; margin-right: 8px; }
.badge.web { background: #0e7a5f; }
.zones { display: grid; gap: 8px 28px; }
@media (min-width: 760px) { .zones { grid-template-columns: 1fr 1.4fr; } }
@media (min-width: 700px) { .zones { display: block; } }
#site-search { width: 100%; max-width: 480px; font-size: 16px; padding: 8px; border: 1px solid #999; box-sizing: border-box; background: #fff; border-radius: 10px; }
.fbtn { font-size: 14px; padding: 4px 12px; cursor: pointer; margin: 2px 4px 2px 0; background: #fff; border: 1px solid #999; border-radius: 20px; }
.fbtn.on { background: #0a2a5e; color: #fff; border-color: #0a2a5e; }

.filterbar { position: sticky; top: 0; background: #fff; z-index: 10; }

/* ---- 商品卡：图＞标题＞标签＞格式；预览图真实比例＋留白纸阵 ---- */
.card.product .thumb { display: block; background: #fff; border: 1px solid #e2e8f0; border-radius: 12px; padding: 10px; margin-bottom: 12px; box-shadow: 0 1px 6px rgba(15, 40, 80, 0.08); }
.card.product .thumb img { width: 100%; height: auto; display: block; }
.card.product h3 { margin-bottom: 8px; }
.tagrow { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.tagrow a, .tagrow span { display: inline-block; border: 1px solid #c3d0e0; background: #f2f6fb; color: #33475e; border-radius: 20px; padding: 1px 10px; font-size: 13px; text-decoration: none; }
.tagrow a:hover { border-color: #1466cc; color: #1466cc; }
.card.product .fields, .card.product .price, .card.product .more { font-size: 15px; }

/* ---- 首页分节网格：断点递减（4→3→2→2 紧凑） ---- */
.subgrid { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; }
.subgrid .card { margin: 0; }
.cat { margin-top: 28px; }
.cat > h2 { margin-top: 0; }
.subsec > h3 { font-size: 16px; margin: 20px 0 12px; color: #33475e; }
@media (min-width: 700px) { .subgrid { grid-template-columns: 1fr 1fr 1fr; } }
@media (min-width: 1100px) { .subgrid { grid-template-columns: 1fr 1fr 1fr 1fr; } }
@media (max-width: 479px) {
  .card.product .fields, .card.product .price, .card.product .more { display: none; }
  .card.product h3 { font-size: 15px; }
}

/* ---- 详情页：预览居中最大化＋装裱；多页叠纸错位 ---- */
.preview { margin: 0 auto 16px; position: relative; }
.preview img { width: 100%; height: auto; display: block; box-sizing: border-box; background: #fff; padding: 12px; border: 1px solid #e2e8f0; border-radius: 12px; box-shadow: 0 4px 20px rgba(15, 40, 80, 0.12); }
.preview figcaption { text-align: center; font-size: 13px; color: #666; margin-top: 8px; }
.preview.multi::before, .preview.multi::after { content: ""; position: absolute; inset: 0; background: #fff; border: 1px solid #e2e8f0; border-radius: 12px; z-index: -1; }
.preview.multi::before { transform: translate(6px, 6px); }
.preview.multi::after { transform: translate(12px, 12px); }

/* ---- 详情页：规格列表线性小图标 ---- */
.specs svg { vertical-align: -2px; margin-right: 6px; }

/* ---- 详情页：同类推荐网格 ---- */
.similar { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; margin: 14px 0; }
@media (min-width: 640px) { .similar { grid-template-columns: 1fr 1fr 1fr; } }
.similar a { display: block; background: #fff; border: 1px solid #e2e8f0; border-radius: 12px; padding: 10px; text-decoration: none; box-shadow: 0 1px 6px rgba(15, 40, 80, 0.08); }
.similar a img { width: 100%; height: auto; display: block; }
.similar a span { display: block; margin-top: 8px; font-size: 15px; line-height: 1.5; color: #222; }