:root {
  --ink: #111;
  --ink2: #444;
  --mute: #8a8a8a;
  --line: #e4e4e4;
  --bg: #fff;
  --soft: #f6f6f6;
  --red: #c8102e;
  --max: 1440px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 'Open Sans', system-ui, -apple-system, sans-serif; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }

/* ---------- 顶栏：左右各两个链接，品牌居中 ---------- */
.top { position: sticky; top: 0; z-index: 20; background: #fff; box-shadow: 0 6px 18px rgba(0,0,0,.05); }
.top nav { max-width: var(--max); margin: 0 auto; height: 92px; padding: 0 24px;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; }
.top .side { display: flex; gap: 56px; }
.top .side.l { justify-content: flex-end; padding-right: 64px; }
.top .side.r { justify-content: flex-start; padding-left: 64px; }
.top .side a { font: 700 13px/1 'Montserrat', sans-serif; letter-spacing: .28em; text-transform: uppercase; padding: 14px 0; border-bottom: 3px solid transparent; }
.top .side a.on, .top .side a:hover { border-bottom-color: var(--red); }
.logo { font: 400 34px/1 'Michroma', 'Montserrat', sans-serif; letter-spacing: .14em; color: var(--red); white-space: nowrap; }
.logo small { display: block; font: 700 9px/1 'Montserrat', sans-serif; letter-spacing: .55em; color: var(--ink); text-align: center; margin-top: 8px; padding-left: .55em; }
.menu-btn { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.menu-btn i { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; }

/* ---------- 列表页 ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 40px 24px 80px; display: grid; grid-template-columns: 260px 1fr; gap: 40px; }
.cats { font-size: 17px; position: sticky; top: 120px; align-self: start; max-height: calc(100vh - 140px); overflow: auto; }
.cats a { display: block; padding: 6px 0; color: var(--ink); }
.cats a:hover { color: var(--red); }
.cats a.on { color: var(--red); font-weight: 600; }
.cats .sub { padding-left: 16px; font-size: 16px; }
.cats .sep { border-bottom: 1px dotted #bbb; width: 180px; margin: 10px 0 14px; padding-bottom: 12px; }
.cats .n { color: var(--ink2); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 56px 24px; }
.intro { display: flex; flex-direction: column; justify-content: center; text-align: center; padding: 0 12px; }
.intro h2 { font: 400 30px/1.15 'Michroma', sans-serif; letter-spacing: .08em; margin: 0 0 40px; text-align: left; }
.intro h2 em { display: block; font-style: normal; text-align: right; font-size: 20px; margin-top: 6px; }
.intro p { color: var(--ink2); line-height: 1.75; margin: 0; }

.card { text-align: center; display: block; }
.card .pic { position: relative; aspect-ratio: 1; display: grid; place-items: center; }
.card .pic img, .card .pic svg { width: 86%; height: 86%; object-fit: contain; transition: transform .45s ease; }
.card:hover .pic img, .card:hover .pic svg { transform: rotate(-8deg) scale(1.03); }
.badge { display: inline-block; background: var(--red); color: #fff; font: 600 12px/1 'Open Sans', sans-serif; letter-spacing: .12em; padding: 6px 8px; }
.card .badge { white-space: nowrap; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%); }
.card h3 { font: 700 19px/1.2 'Montserrat', sans-serif; margin: 24px 0 10px; letter-spacing: .02em; }
.card .sub { color: var(--ink2); margin-bottom: 6px; }
.sizes { font-weight: 700; font-size: 15px; }
.sizes span + span::before { content: '|'; font-weight: 400; margin: 0 7px; color: var(--ink); }
.from { font-style: italic; margin: 6px 0 14px; }
.from b { font-style: normal; }
.sw { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.sw button { width: 34px; height: 34px; border-radius: 50%; border: 2px solid #222; padding: 0; cursor: pointer; transition: transform .15s; }
.sw button:hover, .sw button.on { transform: scale(1.12); box-shadow: 0 0 0 3px #fff, 0 0 0 4px #222; }
.rainbow { width: 190px; height: 6px; border-radius: 3px; margin: 14px auto 8px;
  background: linear-gradient(90deg, #7a1c1c, #c0392b, #2f9fd8, #8e44ad, #6b5b3e, #222, #2c3e50); }
.fcount { color: var(--ink2); letter-spacing: .02em; }
.more { text-align: center; margin-top: 56px; }
.btn { display: inline-block; border: 2px solid var(--ink); background: var(--ink); color: #fff; padding: 14px 34px; font: 700 13px/1 'Montserrat', sans-serif; letter-spacing: .22em; text-transform: uppercase; cursor: pointer; }
.btn:hover { background: var(--red); border-color: var(--red); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: #fff; }
.empty { color: var(--mute); padding: 60px 0; text-align: center; grid-column: 1 / -1; }

/* ---------- 详情页 ---------- */
.detail { max-width: var(--max); margin: 0 auto; padding: 32px 24px 80px; }
.crumb { font-size: 14px; color: var(--mute); margin-bottom: 24px; }
.crumb a:hover { color: var(--red); }
.dgrid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 64px; align-items: start; }
.stage { aspect-ratio: 1; background: var(--soft); display: grid; place-items: center; position: relative; }
.stage img, .stage svg { width: 84%; height: 84%; object-fit: contain; }
.thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.thumbs button { width: 84px; height: 84px; padding: 0; border: 2px solid transparent; background: var(--soft); cursor: pointer; }
.thumbs button.on { border-color: var(--ink); }
.thumbs img { width: 100%; height: 100%; object-fit: contain; }
.info h1 { font: 700 44px/1.1 'Montserrat', sans-serif; margin: 10px 0 6px; letter-spacing: .02em; }
.info .sub { color: var(--ink2); font-size: 18px; }
.info .price { font-size: 22px; margin: 22px 0; }
.info .price small { color: var(--mute); font-size: 15px; }
.lbl { font: 700 12px/1 'Montserrat', sans-serif; letter-spacing: .2em; text-transform: uppercase; margin: 26px 0 12px; }
.lbl span { font: 400 15px/1 'Open Sans', sans-serif; letter-spacing: 0; text-transform: none; color: var(--ink2); margin-left: 8px; }
.info .sw { justify-content: flex-start; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips button { border: 1px solid #ccc; background: #fff; padding: 9px 14px; cursor: pointer; font-size: 15px; }
.chips button.on { border-color: var(--ink); background: var(--ink); color: #fff; }
.facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 22px 0; }
.facts div { background: #fff; padding: 12px 14px; }
.facts dt { font-size: 12px; color: var(--mute); letter-spacing: .1em; text-transform: uppercase; }
.facts dd { margin: 2px 0 0; font-weight: 600; }
.qty { display: flex; align-items: center; gap: 14px; margin: 18px 0 24px; }
.qty input { width: 72px; padding: 10px; border: 1px solid #ccc; text-align: center; }
.desc { color: var(--ink2); line-height: 1.8; white-space: pre-line; }
.specs { margin-top: 72px; }
.specs h2, .quote h2 { font: 700 15px/1 'Montserrat', sans-serif; letter-spacing: .25em; text-transform: uppercase; margin: 0 0 20px; }
.tbl { width: 100%; border-collapse: collapse; font-size: 15px; }
.tbl th { text-align: left; font: 700 12px/1 'Montserrat', sans-serif; letter-spacing: .12em; text-transform: uppercase; padding: 12px 10px; border-bottom: 2px solid var(--ink); }
.tbl td { padding: 12px 10px; border-bottom: 1px solid var(--line); }
.tbl tr:hover td { background: var(--soft); }
.tblwrap { overflow-x: auto; }

/* ---------- 询价表 / 关于 / 页脚 ---------- */
.quote { background: var(--soft); padding: 56px 24px; }
.quote .in { max-width: 820px; margin: 0 auto; }
.quote p { color: var(--ink2); margin: -6px 0 26px; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form .full { grid-column: 1 / -1; }
.form input, .form textarea, .form select { width: 100%; border: 1px solid #ccc; background: #fff; padding: 13px 14px; border-radius: 0; }
.form textarea { min-height: 120px; resize: vertical; }
.form .hp { position: absolute; left: -9999px; }
.msg { margin-top: 14px; font-weight: 600; }
.msg.err { color: var(--red); }
.msg.ok { color: #1a7f37; }

.about { max-width: 980px; margin: 0 auto; padding: 80px 24px; text-align: center; }
.about h2 { font: 400 26px/1.3 'Michroma', sans-serif; letter-spacing: .1em; margin: 0 0 24px; }
.about p { color: var(--ink2); line-height: 1.85; }
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 48px; text-align: left; }
.pillars b { display: block; font: 700 13px/1 'Montserrat', sans-serif; letter-spacing: .2em; margin-bottom: 10px; }

footer { background: #0e0e0e; color: #bbb; padding: 56px 24px 40px; font-size: 14px; }
footer .in { max-width: var(--max); margin: 0 auto; display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
footer .logo { font-size: 22px; }
footer a:hover { color: #fff; }
footer .note { color: #777; margin-top: 10px; }

/* ---------- 窄屏 ---------- */
@media (max-width: 1180px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .top .side { gap: 28px; }
  .top .side.l { padding-right: 32px; }
  .top .side.r { padding-left: 32px; }
}
@media (max-width: 900px) {
  .top nav { height: 68px; grid-template-columns: auto 1fr auto; padding: 0 16px; }
  .logo { font-size: 24px; }
  .logo small { display: none; }
  .menu-btn { display: block; }
  .top .side { display: none; }
  .top.open .side { display: flex; flex-direction: column; gap: 0; position: absolute; left: 0; right: 0; background: #fff; padding: 0 16px; box-shadow: 0 10px 20px rgba(0,0,0,.08); }
  .top.open .side.l { top: 68px; }
  .top.open .side.r { top: calc(68px + 2 * 44px); }
  .top.open .side a { padding: 15px 0; border: 0; border-top: 1px solid var(--line); }
  .wrap { grid-template-columns: 1fr; padding: 20px 16px 60px; gap: 20px; }
  .cats { position: static; max-height: none; display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; font-size: 14px; white-space: nowrap; }
  .cats a { border: 1px solid #ddd; padding: 7px 12px; }
  .cats a.on { border-color: var(--ink); background: var(--ink); color: #fff; }
  .cats .sub { padding-left: 12px; font-size: 14px; }
  .cats .sep { display: none; }
  .intro { grid-column: 1 / -1; padding: 10px 0 0; }
  .intro h2 { font-size: 22px; margin-bottom: 16px; text-align: center; }
  .intro h2 em { text-align: center; font-size: 15px; }
  .grid { gap: 36px 12px; }
  .card h3 { font-size: 16px; margin-top: 16px; }
  .sizes { font-size: 12px; }
  .sizes span + span::before { margin: 0 4px; }
  .sw button { width: 26px; height: 26px; }
  .rainbow { width: 120px; }
  .fcount { font-size: 12px; }
  .dgrid { grid-template-columns: 1fr; gap: 28px; }
  .info h1 { font-size: 32px; }
  .detail { padding: 16px 16px 60px; }
  .thumbs button { width: 64px; height: 64px; }
  .form { grid-template-columns: 1fr; }
  .pillars { grid-template-columns: 1fr; }
  .quote { padding: 40px 16px; }
}
@media (max-width: 480px) {
  .card .from { font-size: 13px; }
  .card .badge { font-size: 10px; padding: 5px 6px; letter-spacing: .08em; }
}