/* ===== 智能伸缩门选型中心 - 科技感暗色主题 ===== */
:root {
  --bg: #070b14;
  --bg2: #0a1120;
  --surface: rgba(255, 255, 255, 0.04);
  --surface2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #eef2f9;
  --text-dim: #9aa6bd;
  --text-faint: #6b7891;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --gold: #fbbf24;
  --grad: linear-gradient(135deg, #22d3ee, #3b82f6);
  --grad-text: linear-gradient(120deg, #67e8f9, #60a5fa);
  --shadow-glow: 0 0 24px rgba(34, 211, 238, 0.25);
  --radius: 16px;
  --radius-sm: 11px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* 背景网格光效 */
.bg-mesh {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(60% 40% at 15% 0%, rgba(34, 211, 238, 0.14), transparent 60%),
    radial-gradient(50% 35% at 90% 5%, rgba(59, 130, 246, 0.14), transparent 60%),
    radial-gradient(60% 40% at 50% 100%, rgba(59, 130, 246, 0.08), transparent 60%),
    var(--bg);
}
.bg-mesh::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.8), transparent 70%);
}

header, section, main, .grid, .result-bar, .footer, .fab, .empty { position: relative; z-index: 1; }

/* ===== 顶部栏 ===== */
.topbar {
  position: relative; z-index: 50;
  background: transparent;
}
.topbar-inner {
  max-width: 560px; margin: 0 auto; padding: 10px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: var(--grad); color: #04121c; font-weight: 800; font-size: 19px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-glow);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name { font-size: 15px; font-weight: 700; letter-spacing: 0.5px; }
.brand-sub { font-size: 10.5px; color: var(--text-faint); }
.contact-pill {
  padding: 8px 15px; border-radius: 999px; border: 1px solid var(--border-strong);
  background: var(--surface2); color: var(--cyan); font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all 0.25s;
}
.contact-pill:active { transform: scale(0.95); background: rgba(34,211,238,0.15); }

/* ===== Hero ===== */
.hero {
  max-width: 560px; margin: 0 auto; padding: 34px 20px 28px; text-align: center;
}
.hero-badge {
  display: inline-block; padding: 6px 14px; border-radius: 999px; font-size: 12px;
  color: var(--cyan); border: 1px solid rgba(34,211,238,0.3);
  background: rgba(34,211,238,0.08); margin-bottom: 18px; letter-spacing: 1px;
}
.hero-title { font-size: 34px; font-weight: 800; line-height: 1.25; letter-spacing: 1px; }
.grad-text {
  background: var(--grad-text); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub { margin-top: 14px; color: var(--text-dim); font-size: 13.5px; line-height: 1.9; }
.hero-cta { margin-top: 22px; display: flex; gap: 12px; justify-content: center; }

.btn {
  border: none; cursor: pointer; font-family: var(--font); font-weight: 600;
  border-radius: 999px; transition: transform 0.15s, box-shadow 0.25s, opacity 0.2s;
}
.btn:active { transform: scale(0.96); }
.btn-primary {
  background: var(--grad); color: #04121c; padding: 12px 24px; font-size: 15px;
  box-shadow: 0 8px 24px rgba(34,211,238,0.35);
}
.btn-ghost {
  background: var(--surface2); color: var(--text); padding: 12px 24px; font-size: 15px;
  border: 1px solid var(--border-strong);
}
.btn-block { width: 100%; padding: 14px; font-size: 16px; }

/* ===== 数据看板 ===== */
.stats {
  max-width: 560px; margin: 0 auto; padding: 4px 16px 8px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
}
.stat {
  text-align: center; padding: 16px 6px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
}
.stat-num { font-size: 22px; font-weight: 800; color: var(--text); }
.stat-num .counter { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-num i { font-style: normal; font-size: 12px; color: var(--gold); margin-left: 1px; }
.stat-label { font-size: 11px; color: var(--text-faint); margin-top: 3px; }

/* ===== 筛选区 ===== */
.filter-wrap {
  position: sticky; top: 0; z-index: 40;
  background: rgba(7, 11, 20, 0.86); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px 10px; max-width: 560px; margin: 0 auto;
}
.search-box {
  display: flex; align-items: center; gap: 8px; padding: 0 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; height: 42px;
  transition: border-color 0.25s;
}
.search-box:focus-within { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(34,211,238,0.12); }
.search-box .icon { width: 18px; height: 18px; color: var(--text-faint); flex: none; }
.search-box input {
  flex: 1; background: none; border: none; outline: none; color: var(--text); font-size: 14px;
  font-family: var(--font);
}
.search-box input::placeholder { color: var(--text-faint); }

.cat-tabs {
  display: flex; gap: 8px; margin-top: 12px; overflow-x: auto; padding-bottom: 2px;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.cat-tabs::-webkit-scrollbar { display: none; }
.cat-tab {
  flex: none; padding: 8px 15px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--text-dim); background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; transition: all 0.22s; white-space: nowrap; font-family: var(--font);
}
.cat-tab.active {
  background: var(--grad); color: #04121c; border-color: transparent;
  box-shadow: 0 4px 16px rgba(34,211,238,0.35);
}

.filter-row { display: flex; align-items: center; gap: 8px; margin-top: 10px; }
.price-chips { display: flex; gap: 7px; flex: 1; overflow-x: auto; scrollbar-width: none; }
.price-chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; padding: 6px 12px; border-radius: 9px; font-size: 12px; font-weight: 600;
  color: var(--text-dim); background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; transition: all 0.2s; font-family: var(--font);
}
.chip.active { color: var(--cyan); border-color: rgba(34,211,238,0.5); background: rgba(34,211,238,0.1); }
.sort-btn {
  flex: none; display: flex; align-items: center; gap: 3px; padding: 6px 12px;
  border-radius: 9px; font-size: 12px; font-weight: 600; color: var(--text);
  background: var(--surface2); border: 1px solid var(--border); cursor: pointer; font-family: var(--font);
}
.sort-btn .icon { width: 15px; height: 15px; }

/* ===== 结果栏 ===== */
.result-bar {
  max-width: 560px; margin: 0 auto; padding: 12px 16px 4px;
  display: flex; align-items: center; justify-content: space-between;
}
.result-bar span { font-size: 12.5px; color: var(--text-faint); }
.reset-btn {
  background: none; border: none; color: var(--cyan); font-size: 12.5px; cursor: pointer; font-family: var(--font);
}

/* ===== 产品网格 ===== */
.grid {
  max-width: 560px; margin: 0 auto; padding: 10px 16px 20px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
}
.card {
  border-radius: var(--radius); overflow: hidden; background: var(--surface);
  border: 1px solid var(--border); cursor: pointer; position: relative;
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.28s, border-color 0.28s;
  animation: cardIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) backwards;
}
.card:active { transform: scale(0.97); }
.card:hover { border-color: var(--border-strong); box-shadow: 0 14px 36px rgba(0,0,0,0.45); }
@keyframes cardIn { from { opacity: 0; transform: translateY(16px) scale(0.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.card-img {
  position: relative; width: 100%; aspect-ratio: 16/10; overflow: hidden; background: #0d1526;
}
.card-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.6s cubic-bezier(0.2,0.8,0.2,1); }
.card:hover .card-img img { transform: scale(1.06); }
.card-img .img-skel {
  position: absolute; inset: 0; background: linear-gradient(100deg, transparent 30%, rgba(255,255,255,0.06) 50%, transparent 70%);
  background-size: 200% 100%; animation: shimmer 1.4s infinite;
}
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
.card-badge {
  position: absolute; top: 8px; left: 8px; padding: 3px 9px; border-radius: 7px; font-size: 10.5px; font-weight: 700;
  background: rgba(7, 11, 20, 0.7); backdrop-filter: blur(6px); color: var(--cyan); border: 1px solid rgba(34,211,238,0.3);
}
.card-body { padding: 10px 11px 12px; }
.card-name { font-size: 14px; font-weight: 700; line-height: 1.3; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-meta { display: flex; align-items: center; gap: 6px; margin-top: 5px; flex-wrap: wrap; }
.card-mat { font-size: 11px; color: var(--text-dim); background: var(--surface2); padding: 2px 8px; border-radius: 6px; }
.card-price { margin-top: 8px; display: flex; align-items: baseline; gap: 3px; }
.card-price .cny { font-size: 12px; color: var(--gold); font-weight: 700; }
.card-price .num { font-size: 20px; font-weight: 800; color: var(--gold); }
.card-price .unit { font-size: 11px; color: var(--text-dim); }
.card-price.negotiable .num { font-size: 15px; color: var(--text-dim); }
.card-price.negotiable .cny { display: none; }

/* ===== 空状态 ===== */
.empty { max-width: 560px; margin: 30px auto; text-align: center; color: var(--text-faint); padding: 40px 16px; }
.empty .icon-lg { width: 48px; height: 48px; opacity: 0.5; }
.empty p { margin-top: 12px; font-size: 15px; }
.empty .empty-sub { font-size: 12.5px; margin-top: 4px; opacity: 0.8; }

/* ===== 通用 section ===== */
.section { max-width: 560px; margin: 26px auto 0; padding: 0 16px; }
.section-title { font-size: 20px; font-weight: 800; letter-spacing: 0.5px; }
.section-desc { font-size: 12.5px; color: var(--text-faint); margin-top: 4px; }

/* ===== 价格说明 ===== */
.formula-card {
  margin-top: 16px; padding: 18px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
}
.formula { font-size: 16px; font-weight: 700; text-align: center; }
.formula .eq { color: var(--text-faint); margin: 0 4px; }
.formula .plus { color: var(--cyan); margin: 0 2px; }
.formula-items { margin-top: 16px; display: flex; flex-direction: column; }
.fitem {
  display: flex; justify-content: space-between; align-items: center;
  padding: 11px 4px; border-bottom: 1px dashed var(--border);
}
.fitem:last-child { border-bottom: none; }
.fname { font-size: 13.5px; color: var(--text-dim); }
.fval { font-size: 14px; font-weight: 700; color: var(--gold); }
.formula-note { margin-top: 12px; font-size: 11.5px; color: var(--text-faint); text-align: center; }

/* ===== 服务保障 ===== */
.assure-list { margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }
.assure {
  display: flex; gap: 14px; padding: 15px 16px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
}
.assure-icon { font-size: 22px; flex: none; line-height: 1.4; }
.assure-body b { font-size: 14.5px; }
.assure-body p { font-size: 12.5px; color: var(--text-dim); margin-top: 3px; }

/* ===== 联系我们 ===== */
.contact-card {
  margin-top: 16px; padding: 18px 16px; border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(34,211,238,0.08), rgba(59,130,246,0.06));
  border: 1px solid rgba(34,211,238,0.25);
}
.contact-row { display: flex; align-items: center; gap: 12px; padding: 11px 0; border-bottom: 1px dashed var(--border); }
.contact-row:last-of-type { border-bottom: none; }
.c-icon { font-size: 20px; flex: none; }
.c-body { flex: 1; display: flex; flex-direction: column; }
.c-label { font-size: 11px; color: var(--text-faint); }
.c-value { font-size: 16px; font-weight: 700; color: var(--text); text-decoration: none; }
.c-action {
  padding: 6px 13px; border-radius: 8px; font-size: 12px; font-weight: 600; cursor: pointer;
  background: var(--surface2); border: 1px solid var(--border-strong); color: var(--cyan); font-family: var(--font);
}
.contact-card .btn-block { margin-top: 14px; }

/* ===== Footer ===== */
.footer { max-width: 560px; margin: 34px auto 0; padding: 24px 16px 30px; text-align: center; border-top: 1px solid var(--border); }
.footer p { font-size: 12.5px; color: var(--text-faint); }
.footer .footer-sub { font-size: 11px; margin-top: 4px; opacity: 0.7; }

/* ===== 浮动咨询按钮 ===== */
.fab {
  position: fixed; right: 18px; bottom: 28px; z-index: 60; width: 54px; height: 54px;
  border-radius: 50%; background: var(--grad); border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center; color: #04121c;
  box-shadow: 0 10px 28px rgba(34,211,238,0.4);
  transition: transform 0.2s;
}
.fab:active { transform: scale(0.9); }
.fab .icon { width: 24px; height: 24px; }

/* ===== 底部抽屉 ===== */
.sheet-mask {
  position: fixed; inset: 0; z-index: 80; background: rgba(3, 6, 12, 0.6);
  opacity: 0; pointer-events: none; transition: opacity 0.3s; backdrop-filter: blur(3px);
}
.sheet-mask.show { opacity: 1; pointer-events: auto; }
.sheet {
  position: fixed; left: 50%; transform: translateX(-50%) translateY(100%); bottom: 0; z-index: 81;
  width: 100%; max-width: 560px; height: 88vh; max-height: 88vh;
  background: #0b1322; border-radius: 22px 22px 0 0;
  border: 1px solid var(--border-strong); border-bottom: none;
  transition: transform 0.38s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex; flex-direction: column; overflow: hidden;
}
.sheet.show { transform: translateX(-50%) translateY(0); }
.sheet-handle { flex: none; width: 40px; height: 4px; border-radius: 2px; background: var(--border-strong); margin: 10px auto 2px; }
.sheet-scroll { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; }
.sheet-hero { position: relative; height: 220px; overflow: hidden; background: #0d1526; }
.sheet-hero img { width: 100%; height: 100%; object-fit: cover; }
.sheet-hero .close-btn {
  position: absolute; top: 12px; right: 14px; width: 34px; height: 34px; border-radius: 50%;
  background: rgba(7,11,20,0.6); border: 1px solid var(--border-strong); color: #fff;
  display: flex; align-items: center; justify-content: center; cursor: pointer; backdrop-filter: blur(6px);
}
.sheet-body { padding: 18px 18px 30px; }
.p-name { font-size: 21px; font-weight: 800; }
.p-tags { display: flex; gap: 7px; margin-top: 8px; flex-wrap: wrap; }
.p-tags .tag { font-size: 11px; padding: 3px 10px; border-radius: 7px; background: var(--surface2); color: var(--text-dim); border: 1px solid var(--border); }
.p-price { margin-top: 12px; display: flex; align-items: baseline; gap: 3px; }
.p-price .cny { font-size: 15px; color: var(--gold); font-weight: 700; }
.p-price .num { font-size: 30px; font-weight: 800; color: var(--gold); }
.p-price .unit { font-size: 13px; color: var(--text-dim); }
.p-price.negotiable .num { font-size: 20px; color: var(--text-dim); }
.p-desc { margin-top: 12px; font-size: 13px; color: var(--text-dim); line-height: 1.75; }

/* 价格估算器 */
.calc {
  margin-top: 18px; padding: 16px; border-radius: var(--radius);
  background: rgba(34,211,238,0.06); border: 1px solid rgba(34,211,238,0.22);
}
.calc-title { font-size: 14px; font-weight: 700; margin-bottom: 14px; }
.calc-field { margin-bottom: 14px; }
.calc-field label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 7px; }
.stepper { display: flex; align-items: center; gap: 8px; }
.step-btn {
  width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border-strong);
  background: var(--surface2); color: var(--text); font-size: 20px; cursor: pointer; font-family: var(--font);
}
.step-btn:active { transform: scale(0.92); }
.stepper input {
  flex: 1; height: 38px; text-align: center; border-radius: 10px; font-size: 17px; font-weight: 700;
  background: var(--surface); border: 1px solid var(--border); color: var(--text); outline: none; font-family: var(--font);
}
.stepper input:focus { border-color: var(--cyan); }
.seg { display: flex; gap: 8px; }
.seg-btn {
  flex: 1; height: 38px; border-radius: 10px; border: 1px solid var(--border); cursor: pointer;
  background: var(--surface); color: var(--text-dim); font-size: 13px; font-weight: 600; font-family: var(--font);
  transition: all 0.2s;
}
.seg-btn.active { background: rgba(34,211,238,0.16); border-color: rgba(34,211,238,0.5); color: var(--cyan); }
.opt-list { display: flex; flex-wrap: wrap; gap: 9px; }
.opt {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border-radius: 9px;
  font-size: 12.5px; color: var(--text-dim); background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; transition: all 0.2s;
}
.opt input { accent-color: var(--cyan); width: 15px; height: 15px; }
.opt i { font-style: normal; color: var(--text-faint); }
.opt.on { border-color: rgba(34,211,238,0.5); color: var(--text); }
.calc-breakdown { margin-top: 6px; display: flex; flex-direction: column; }
.calc-line { display: flex; justify-content: space-between; align-items: baseline; padding: 7px 0; font-size: 13px; }
.calc-line .cl-name { color: var(--text-dim); flex: none; }
.calc-line .cl-detail { color: var(--text-faint); font-size: 11.5px; margin-left: auto; margin-right: 12px; text-align: right; }
.calc-line .cl-val { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; flex: none; }
.calc-line.total { border-top: 1px dashed var(--border); margin-top: 4px; padding-top: 13px; }
.calc-line.total .cl-name { color: var(--text); font-weight: 700; font-size: 14px; }
.calc-line.total .cl-val { color: var(--gold); font-size: 22px; font-weight: 800; }
.calc-note { margin-top: 10px; font-size: 11px; color: var(--text-faint); }

/* 规格表 */
.spec-block { margin-top: 22px; }
.block-title { font-size: 15px; font-weight: 700; margin-bottom: 10px; position: relative; padding-left: 12px; }
.block-title::before { content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 4px; height: 16px; border-radius: 2px; background: var(--grad); }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table tr { border-bottom: 1px solid var(--border); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table td { padding: 10px 4px; font-size: 13px; }
.spec-table td:first-child { color: var(--text-faint); width: 40%; }
.spec-table td:last-child { color: var(--text); text-align: right; font-weight: 600; }
.feature-list { list-style: none; }
.feature-list li { position: relative; padding: 7px 0 7px 20px; font-size: 13px; color: var(--text-dim); }
.feature-list li::before { content: ""; position: absolute; left: 2px; top: 15px; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); }
.sheet-actions { margin-top: 26px; padding-bottom: 8px; display: flex; flex-direction: column; gap: 10px; }

/* ===== 详情图集 ===== */
.gallery { display: flex; gap: 8px; padding: 10px 16px 0; overflow-x: auto; scrollbar-width: none; }
.gallery::-webkit-scrollbar { display: none; }
.gallery .thumb {
  flex: none; width: 64px; height: 48px; border-radius: 8px; overflow: hidden; cursor: pointer;
  border: 2px solid transparent; opacity: 0.6; transition: all 0.2s; background: #0d1526;
}
.gallery .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gallery .thumb.active { border-color: var(--cyan); opacity: 1; }
.gallery .thumb:active { transform: scale(0.94); }

/* ===== 大图查看层 ===== */
.lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(3, 6, 12, 0.94);
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.lightbox.show { opacity: 1; pointer-events: auto; }
.lightbox .lb-stage { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; padding: 24px; }
.lightbox .lb-stage img { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 6px; animation: lbZoom 0.3s ease; }
@keyframes lbZoom { from { transform: scale(0.92); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.lb-close {
  position: absolute; top: 16px; right: 16px; z-index: 3; width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,255,255,0.1); border: 1px solid var(--border-strong); color: #fff; font-size: 18px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
}
.lb-count { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); color: var(--text-dim); font-size: 13px; }


/* ===== Toast ===== */
.toast {
  position: fixed; left: 50%; bottom: 100px; z-index: 100; transform: translateX(-50%) translateY(20px);
  padding: 11px 22px; border-radius: 999px; background: rgba(20, 30, 50, 0.92); color: var(--text);
  font-size: 13.5px; border: 1px solid var(--border-strong); backdrop-filter: blur(8px);
  opacity: 0; pointer-events: none; transition: all 0.3s; white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 桌面端适配 */
@media (min-width: 640px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
  .hero-title { font-size: 42px; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ===== v3 扩展 ===== */
.sheet{max-height:94vh}
.hero-banner{position:relative;margin:0 16px;border-radius:16px;overflow:hidden;border:1px solid var(--border)}
.hero-banner img{width:100%;height:150px;object-fit:cover;display:block}
.hero-banner .hb-mask{position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,11,20,.85),rgba(7,11,20,.2))}
.hero-banner .hb-text{position:absolute;left:14px;top:50%;transform:translateY(-50%);z-index:2}
.hero-banner .hb-text b{font-size:17px;color:#fff;display:block}
.hero-banner .hb-text span{font-size:11px;color:var(--text-dim);display:block;margin-top:3px}
.cat-wall{display:grid;grid-template-columns:repeat(2,1fr);grid-auto-rows:auto;align-content:start;gap:10px;padding:0 16px;margin-top:12px}
.cw{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--border);min-height:96px;cursor:pointer;background:#0d1424;display:flex;align-items:center;justify-content:center}
#homeView{min-height:100vh;display:flex;flex-direction:column}
.cw img{width:100%;height:100%;object-fit:contain;display:block}
.cw-more{position:absolute;left:50%;top:auto;bottom:10px;transform:translateX(-50%);font-size:14px;font-weight:700;color:#fff;background:linear-gradient(135deg,#22d3ee,#6366f1);padding:8px 18px;border-radius:999px;white-space:nowrap;pointer-events:none;letter-spacing:1px;box-shadow:0 4px 20px rgba(34,211,238,.55),0 0 0 2px rgba(255,255,255,.18)}
.cw .in span{font-size:10px;color:var(--cyan)}
.hero-bg{position:relative;margin:10px 16px 0;border-radius:16px;overflow:hidden;background:url(assets/img/factory_bg.webp) center/cover;height:190px;display:flex;flex-direction:column;justify-content:space-between;padding:16px 18px;border:1px solid var(--border)}
.hero-bg:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,11,20,.82),rgba(7,11,20,.3))}
.hero-bg .hero-badge{position:relative;z-index:2}
.hero-slogan{position:relative;z-index:2;font-size:21px;font-weight:700;color:#fbbf24;letter-spacing:1px}
.hero-slogan .fee{font-size:12px;font-weight:400;color:#fff;background:rgba(251,191,36,.22);border:1px solid rgba(251,191,36,.5);padding:1px 7px;border-radius:4px;margin-left:5px;vertical-align:middle}
.sheet-hero{position:relative}
.sheet-hero img{width:100%;max-height:220px;object-fit:contain !important;background:#0d1424}
.p-tags{margin-top:6px}
.tg{display:inline-block;font-size:10px;padding:2px 7px;border-radius:4px;background:rgba(251,191,36,.15);color:var(--gold);margin-right:5px;margin-bottom:4px}
.tg.st{background:rgba(34,211,238,.15);color:var(--cyan)}
.tg.mat{background:rgba(59,130,246,.15);color:#60a5fa}
.tg.mdl{background:rgba(255,255,255,.08);color:var(--text-dim)}
.cb-title{font-size:13px;font-weight:600;color:var(--cyan);margin-bottom:9px;display:flex;align-items:center;gap:6px}
.cb-title svg{width:15px;height:15px;flex:0 0 auto}
.spec-block,.calc-block{background:rgba(255,255,255,.03);border:1px solid var(--border);border-radius:14px;padding:13px;margin-top:12px}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}
.sg{background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:9px;padding:7px 10px;display:flex;justify-content:space-between;align-items:center;gap:6px}
.sg span{font-size:11px;color:var(--text-faint);flex:0 0 auto}
.sg b{font-size:12px;color:var(--text);font-weight:500;text-align:right;word-break:break-all}
.field{margin-bottom:12px}
.field label{display:block;font-size:12px;color:var(--text-dim);margin-bottom:6px;display:flex;align-items:center;gap:5px}
.field label svg{width:14px;height:14px;color:var(--cyan)}
.mode-seg{display:flex;gap:8px;margin-bottom:10px}
.mode-seg button{flex:1;padding:9px 0;border:1px solid var(--border);border-radius:9px;background:transparent;color:var(--text-dim);font-size:12px;cursor:pointer}
.mode-seg button.on{background:var(--grad);color:#fff;border-color:transparent}
.len-row{display:flex;gap:10px;align-items:center}
.len-row input[type=number]{width:86px;padding:9px 11px;border:1px solid var(--border);border-radius:10px;background:rgba(255,255,255,.04);color:var(--text);font-size:15px;font-family:inherit}
.len-row input[type=range]{flex:1;-webkit-appearance:none;height:5px;border-radius:3px;background:rgba(255,255,255,.12)}
.len-row input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--cyan);border:2px solid #0d1424;cursor:pointer}
.len-note{font-size:11px;color:var(--text-faint);margin-top:6px;line-height:1.5}
.dir-grid{display:flex;gap:8px;align-items:center}
.dir{border:1px solid var(--border);border-radius:11px;overflow:hidden;cursor:pointer;padding:6px;text-align:center;transition:all .3s cubic-bezier(.34,1.56,.64,1);opacity:.35;transform:scale(.72);flex:1}
.dir img{width:100%;aspect-ratio:2/1;object-fit:contain;display:block}
.dir .dn{font-size:11px;color:var(--text-dim);margin-top:4px}
.dir.on{border-color:var(--cyan);box-shadow:0 0 0 1px var(--cyan);opacity:1;transform:scale(1.08);background:rgba(34,211,238,.07);flex:1.6}
.head-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.head-row button{padding:11px 8px;border:1px solid var(--border);border-radius:10px;background:transparent;color:var(--text-dim);font-size:13px;cursor:pointer;text-align:center}
.head-row button.on{border-color:var(--cyan);background:rgba(34,211,238,.1);color:#fff}
.head-row button b{color:var(--cyan);font-size:14px}
.opt-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.opt-mini{border:1px solid var(--border);border-radius:10px;padding:9px 10px;cursor:pointer;background:rgba(255,255,255,.02)}
.opt-mini .om-top{display:flex;justify-content:space-between;align-items:center}
.opt-mini .om-n{font-size:12px;font-weight:500;display:flex;align-items:center;gap:5px}
.opt-mini .om-n svg{width:13px;height:13px;color:var(--text-faint)}
.opt-mini .om-p{font-size:12px;color:var(--cyan);font-weight:600}
.opt-mini .om-d{font-size:10px;color:var(--text-faint);margin-top:3px;line-height:1.4}
.opt-mini.on{border-color:var(--cyan);background:rgba(34,211,238,.08)}
.calc-detail{background:rgba(255,255,255,.02);border:1px solid var(--border);border-radius:11px;padding:10px 12px;margin-top:12px}
.cd-row{display:flex;justify-content:space-between;font-size:12px;padding:4px 0;color:var(--text-dim)}
.cd-row b{color:var(--text);font-weight:500}
.cd-row.hl b{color:var(--gold)}
.calc-result{background:var(--grad);border-radius:12px;padding:14px;margin-top:12px}
.calc-result .total{display:flex;justify-content:space-between;font-size:23px;font-weight:700}
.garage{background:#FFF7ED;border:1px solid #FDE68A;border-radius:11px;padding:11px 12px;margin-top:10px;color:#92400e}
.garage .g-title{font-weight:600;font-size:12px;margin-bottom:6px;display:flex;align-items:center;gap:5px}
.garage .g-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.garage .g-cell{background:rgba(255,255,255,.5);border-radius:8px;padding:7px 8px;text-align:center}
.garage .g-cell b{font-size:14px;display:block}
.garage .g-cell span{font-size:10px;color:#92400e}
.disclaimer{font-size:11px;color:#B45309;background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.3);border-radius:9px;padding:9px 11px;margin-top:10px;line-height:1.6}
.speed-tag{font-size:11px;color:var(--text-faint);margin-top:8px;display:flex;align-items:center;gap:5px}
.back-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:rgba(255,255,255,.02);border-bottom:1px solid var(--border);cursor:pointer;position:sticky;top:0;z-index:40;backdrop-filter:blur(8px)}
.back-bar .bk{font-size:22px;color:var(--cyan);line-height:1}
.back-bar b{font-size:15px;font-weight:600}
.tabs-row{display:flex;gap:6px;overflow:visible;flex-wrap:nowrap;align-items:center}
.tabs-row .cat-tabs{display:flex;gap:6px;flex:1 1 auto;overflow:visible;margin-top:0;padding-bottom:0}
.tabs-row .cat-tabs:last-child{justify-content:flex-end}
.tabs-row .cat-tab{padding:6px 10px;font-size:12px}
.card-img img{object-fit:contain;background:#0d1424}
.garage-table{width:100%;border-collapse:collapse;margin-top:6px}
.garage-table th,.garage-table td{border:1px solid #FDE68A;padding:7px 9px;font-size:12px;text-align:left}
.garage-table th{background:rgba(251,191,36,.15);color:#92400e;font-weight:600;width:22%}
.garage-table td:nth-child(2){font-weight:600;color:#92400e;white-space:nowrap}
.garage-table td:nth-child(3){color:#b45309;font-size:11px}
.cd-len{display:flex;justify-content:space-between;align-items:baseline;gap:6px;padding:4px 0 8px;border-bottom:1px dashed var(--border);margin-bottom:4px;flex-wrap:wrap}
.cd-len span{font-size:12px;color:var(--text-dim)}
.cd-len b{font-size:16px;color:var(--text)}
.cd-len .sug b{font-size:20px;color:var(--gold);font-weight:700}
.cd-len .pair{font-size:11px;color:var(--cyan)}
.cd-note{font-size:11px;color:var(--text-faint);padding:4px 0 6px;line-height:1.5;border-bottom:1px dashed var(--border);margin-bottom:4px}
.cd-row b.big{font-size:17px;color:var(--cyan)}
.card-pri{font-size:14px;color:var(--cyan);font-weight:600}
.card-pri i{font-style:normal;font-size:10px;color:var(--text-faint);font-weight:400}
.track-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}
.opt-mini.track{text-align:center}
.opt-mini.track .tk-img{width:100%;height:52px;object-fit:contain;border-radius:6px;margin-bottom:5px;display:block}
.tk-empty{display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.04);border-radius:6px;color:#4a5568;font-size:11px}
.opt-mini.track .om-top{justify-content:center}
.card-name.sm{font-size:11px}
.card-name.sm .card-pri{font-size:12px}
.mode-seg button{line-height:1.35}
.mode-seg button small{display:block;font-size:10px;font-weight:400;opacity:.8}
.garage-table td{white-space:nowrap}
.contact-pill{text-decoration:none;display:inline-flex;align-items:center}
.len-unit{color:var(--text-dim);font-size:13px;flex:0 0 auto;white-space:nowrap}
.group-head{grid-column:1/-1;margin:10px 0 2px;padding-top:6px;display:flex;flex-direction:column;gap:3px}
.group-head b{font-size:15px;font-weight:700;color:var(--cyan)}
.group-head span{font-size:11px;font-weight:400;color:var(--text-faint);line-height:1.5}
.bar-tabs-row{grid-column:1/-1;margin:0 0 2px;display:flex;overflow-x:auto}
.bar-tabs-row .cat-tabs{display:flex;gap:8px;flex:0 0 auto}
.bar-tabs-row .sort-btn{margin-left:auto;flex:0 0 auto;white-space:nowrap}
/* ===== 道闸/车牌 白底原图直接展示（不抠图）===== */
.bar-card .card-img{background:#eef2f7}
.bar-card .card-img img{object-fit:contain;background:#fff}
.bar-hero{background:#eef2f7 !important}
.bar-hero img{background:#fff !important}
/* ===== 规格参数表格 + 升降柱子分类 ===== */
.spec-table{width:100%;border-collapse:collapse}
.spec-table th,.spec-table td{border:1px solid var(--border);padding:7px 10px;font-size:12px;text-align:left;vertical-align:top}
.spec-table th{background:rgba(255,255,255,.04);color:var(--text-dim);font-weight:normal;width:38%;white-space:nowrap}
.spec-table td{color:var(--text);word-break:break-all}
.spec-table tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.subcat-head{grid-column:1/-1;font-size:13px;font-weight:700;color:var(--gold);margin:8px 0 2px;padding-left:2px}
/* ===== 计算器选项配图 ===== */
.head-row button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px}
.opt-img{width:100%;height:44px;object-fit:contain;border-radius:6px;margin-bottom:2px;display:block;background:#fff}
.field label .opt-img{width:22px;height:22px;display:inline-block;border-radius:4px;object-fit:contain;background:#fff}
.parts-list{display:flex;flex-wrap:wrap;gap:7px}
.part-chip{font-size:11px;color:var(--text);background:rgba(255,255,255,.06);border:1px solid var(--border);border-radius:8px;padding:4px 10px}
/* ===== v3 浮动联系我们按钮（球形，两行字，上移 1/3 处） ===== */
.fab{position:fixed;right:14px;top:66%;bottom:auto;width:76px;height:76px;border-radius:50%;background:linear-gradient(135deg,#ff9500,#ff2d55);flex-direction:column;gap:2px;font-size:14px;font-weight:700;color:#fff;text-decoration:none;letter-spacing:1px;box-shadow:0 8px 26px rgba(255,77,60,.7),0 0 0 3px rgba(255,255,255,.3);animation:fabPulse 2s ease-in-out infinite}
.fab svg{width:18px;height:18px;flex:0 0 auto;margin-bottom:2px}
.fab span{line-height:1.15;text-align:center}
@keyframes fabPulse{0%,100%{box-shadow:0 8px 26px rgba(255,77,60,.7),0 0 0 3px rgba(255,255,255,.3)}50%{box-shadow:0 8px 40px rgba(255,77,60,1),0 0 0 9px rgba(255,77,60,.1)}}
/* ===== 底部 footer：公司信息 + 备案号（SEO/微信信任）===== */
.site-footer{position:relative;z-index:1;background:#070b14;border-top:1px solid var(--border);padding:26px 16px 30px;margin-top:auto;text-align:center}
.site-footer .f-brand{font-size:17px;font-weight:700;color:#f1f5f9;margin-bottom:10px;letter-spacing:.3px}
.site-footer .f-desc{font-size:12px;color:var(--text-faint);line-height:1.7;margin-bottom:8px}
.site-footer .f-contact{font-size:13px;color:#cbd5e1;margin-bottom:10px}
.site-footer .f-beian{margin-top:2px}
.site-footer .f-beian a{font-size:14px;font-weight:600;color:#93c5fd;text-decoration:none}
/* ===== 桌面端响应式适配（电脑打开也好看）===== */
@media (min-width: 900px) {
  .topbar-inner,.hero,.stats,.filter-wrap,.section,.result-bar,.empty,.footer,.grid{max-width:1100px}
  .hero-bg{width:1100px;max-width:1100px;margin:10px auto 0;border-radius:16px;height:260px;padding:16px 18px}
  .cat-wall{max-width:1100px;margin:12px auto 0;grid-template-columns:repeat(3,1fr)}
  .bar-tabs-row{max-width:1100px;margin-left:auto;margin-right:auto}
  .site-footer .footer-inner{max-width:1100px;margin:0 auto}
  .grid{grid-template-columns:repeat(4,1fr)}
  .hero-slogan{font-size:28px}
  .cw{min-height:130px}
}