/* =============================================
   气体纯化设备页 — 编辑式重构（对齐首页 home.css）
   白底、墨色标题、细线分隔、蓝 #0066cc 唯一强调色
   挂载 <body class="ep">，依赖 css/style.css + css/editorial.css
   结构：编辑式页头 → 指标带 → 产品总览网格 → 系列详解 →
         型号解析与选型矩阵 → 售后与手册 → 浅色 CTA
   ============================================= */

/* ---------- 章节骨架：白 / 浅灰交替 + 首页同款章节头 ---------- */
body.ep .pu-sec { padding: 36px 0; }
body.ep .pu-sec-alt { background: var(--ep-alt); border-top: 1px solid var(--ep-line); }
body.ep .pu-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ep-line);
}
body.ep .pu-title {
  margin-top: 12px;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--ep-ink);
}
body.ep .pu-head-desc { max-width: 460px; font-size: 13.5px; line-height: 1.8; color: var(--ep-mute); }

/* ---------- 页头按钮：首页同款胶囊按钮 ---------- */
body.ep .ep-head .ep-btn { border-radius: 999px; padding: 12px 26px; font-size: 14px; letter-spacing: 0.02em; }

/* ---------- 页头产品系列索引：墨色顶线 + 编号目录式导航 ---------- */
body.ep .pu-index { margin-top: 36px; border-top: 1px solid var(--ep-ink); padding-top: 16px; }
body.ep .pu-index-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 6px; }
body.ep .pu-index-title { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; color: var(--ep-ink); }
body.ep .pu-index-note { font-size: 11.5px; letter-spacing: 0.06em; color: var(--ep-mute); font-variant-numeric: tabular-nums; }
body.ep .pu-index-grid { display: grid; grid-template-columns: repeat(4, 1fr); column-gap: 28px; margin: 0; padding: 0; list-style: none; }
body.ep .pu-index-grid a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 2px;
  border-bottom: 1px solid var(--ep-line);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ep-body);
  line-height: 1.5;
  transition: color 0.2s ease, border-color 0.2s ease;
}
body.ep .pu-index-grid a i {
  flex-shrink: 0;
  font-style: normal;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--ep-blue);
  font-variant-numeric: tabular-nums;
}
body.ep .pu-index-grid a span { flex: 1; min-width: 0; }
body.ep .pu-index-grid a::after {
  content: "›";
  flex-shrink: 0;
  font-size: 15px;
  line-height: 1;
  color: var(--ep-mute);
  opacity: 0.55;
  transition: color 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
}
body.ep .pu-index-grid a:hover { color: var(--ep-ink); border-bottom-color: var(--ep-blue); }
body.ep .pu-index-grid a:hover::after { color: var(--ep-blue); opacity: 1; transform: translateX(3px); }

/* ---------- 产品系列总览（首页“主要产品”h-series 同构卡） ---------- */
body.ep .pu-ov-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
body.ep .pu-card {
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 18px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--ep-line-light);
  border-radius: 16px;
  padding: 18px 20px 18px 16px;
  box-shadow: 0 4px 14px rgba(9, 36, 66, 0.03);
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
body.ep .pu-card:hover {
  border-color: rgba(0, 102, 204, 0.28);
  box-shadow: 0 16px 36px rgba(9, 36, 66, 0.10);
  transform: translateY(-3px);
}
body.ep .pu-card-img {
  height: 150px;
  background: linear-gradient(180deg, #fafafa 0%, var(--ep-alt) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  overflow: hidden;
}
body.ep .pu-card-img img { max-height: 132px; max-width: 100%; width: auto; height: auto; object-fit: contain; transition: transform 0.5s ease; }
body.ep .pu-card:hover .pu-card-img img { transform: scale(1.05); }
body.ep .pu-model { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 700; letter-spacing: 0.06em; color: var(--ep-blue); font-variant-numeric: tabular-nums; }
body.ep .pu-flag { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; color: #fff; background: var(--ep-blue); border-radius: 999px; padding: 1.5px 8px; }
body.ep .pu-card-body h3 { font-size: 16px; font-weight: 600; color: var(--ep-ink); margin-top: 5px; line-height: 1.4; transition: color 0.3s; }
body.ep .pu-card:hover h3 { color: var(--ep-blue); }
body.ep .pu-card-body p {
  margin-top: 6px;
  font-size: 13px;
  color: var(--ep-mute);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 页头产品系列索引：三大品类分组目录 ---------- */
body.ep .pu-idx-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px 32px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ep-line);
}
body.ep .pu-idx-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 48px;
}
body.ep .pu-idx-cols .pu-idx-row { grid-template-columns: 1fr; }
body.ep .pu-idx-cols .pu-idx-row:last-child { border-bottom: none; }
body.ep .pu-idx-label b {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ep-ink);
}
body.ep .pu-idx-label span {
  display: block;
  margin-top: 3px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ep-mute);
}
body.ep .pu-idx-row .pu-index-grid { grid-template-columns: repeat(2, 1fr); }

/* ---------- 产品总览：品类分组头 ---------- */
body.ep .pu-cat { margin-top: 56px; }
body.ep .pu-head + .pu-cat { margin-top: 24px; }
body.ep .pu-sec .pu-cat:first-of-type { margin-top: 0; }
body.ep .pu-cat-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ep-line);
}
body.ep .pu-cat-en {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ep-blue);
}
/* 品类名即区块大标题，与页面区块标题同字号（pu-title 24~32px） */
body.ep .pu-cat-name {
  margin-top: 2px;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--ep-ink);
}
body.ep .pu-cat-count {
  flex-shrink: 0;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ep-mute);
  border: 1px solid var(--ep-line);
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}
body.ep .pu-cat-desc {
  margin: 14px 0 24px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ep-mute);
}
body.ep .pu-cat .pu-ov-grid { margin-top: 4px; }
/* 3 列网格 10 卡：末卡（气体净化柱）另起末行，单格宽 */
body.ep .pu-ov-grid > .pu-card.pu-break { grid-column-start: 1; }
/* ---------- 品类二/三：单系列品类（半宽并排，卡片放宽为横向） ---------- */
body.ep .pu-cat-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-top: 56px;
  align-items: start;
}
body.ep .pu-sec .pu-cat-pair > .pu-cat { margin-top: 0; }
body.ep .pu-cat-pair .pu-ov-grid { grid-template-columns: minmax(0, 1fr); }
/* 单列品类中卡片放宽为横向大卡，图区略放大 */
body.ep .pu-cat-pair .pu-card { grid-template-columns: 164px 1fr; }
body.ep .pu-cat-pair .pu-card-img { height: 168px; }
body.ep .pu-cat-pair .pu-card-img img { max-height: 148px; }
body.ep .pu-cat-pair .pu-model { white-space: nowrap; }

/* 卡片“查看产品详情”引导 */
body.ep .pu-more {
  display: inline-block;
  margin-top: 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ep-blue);
}

/* ---------- 系列详解：开放式行布局，细线分隔替代卡片套卡片 ---------- */
body.ep .pu-detail { padding: 56px 0 60px; border-top: 1px solid var(--ep-line); scroll-margin-top: calc(var(--header-h) + 20px); }
body.ep .pu-head + .pu-detail { border-top: none; padding-top: 8px; }

body.ep .pu-d-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 14px 18px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
body.ep .pu-d-title {
  margin-top: 8px;
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--ep-ink);
}
body.ep .pu-d-pill {
  flex-shrink: 0;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ep-ink);
  background: #fff;
  border: 1px solid var(--ep-line);
  border-radius: 999px;
  padding: 5px 14px;
  white-space: nowrap;
}
body.ep .pu-d-pill.is-new { color: #fff; background: var(--ep-blue); border-color: var(--ep-blue); }

body.ep .pu-d-grid { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 44px; align-items: start; }
/* 画廊沿用 p-gallery / p-stage / p-thumbs（编辑式皮肤换色），仅控制列宽与间距 */
body.ep .pu-d-grid .p-caption { margin-top: 10px; text-align: center; }

body.ep .pu-d-body { min-width: 0; }
body.ep .pu-d-body .p-desc { margin-top: 0; }
body.ep .pu-d-body .p-feats { margin-bottom: 4px; }

/* 参数表通栏铺开，脱离窄列，行距更从容 */
body.ep .pu-detail .p-spec-wrap { margin-top: 30px; }
body.ep .pu-detail .p-notice-box { margin-top: 18px; }

body.ep .pu-d-foot {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px dashed var(--ep-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px 16px;
  flex-wrap: wrap;
}
body.ep .pu-d-foot .p-foot-btns { margin-left: auto; }

/* 技术手册下载按钮：编辑式胶囊 */
body.ep .dl-btn { background: #fff; border: 1.5px solid var(--ep-line); color: var(--ep-blue); border-radius: 999px; }
body.ep .dl-btn:hover { border-color: var(--ep-blue); background: rgba(0, 102, 204, 0.04); }
body.ep .dl-btn .meta { color: var(--ep-mute); font-weight: 500; font-size: 12px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  body.ep .pu-sec { padding: 32px 0; }
  body.ep .pu-head { flex-direction: column; align-items: flex-start; gap: 14px; margin-bottom: 18px; }
  body.ep .pu-ov-grid { grid-template-columns: repeat(2, 1fr); }
  body.ep .pu-detail { padding: 44px 0 48px; }
  body.ep .pu-d-grid { grid-template-columns: 1fr; gap: 28px; }
  body.ep .pu-d-grid .p-gallery { max-width: 520px; }
  body.ep .pu-d-grid .p-stage { height: 300px; }
  body.ep .pu-d-grid .p-main-img { max-height: 260px; }
  body.ep .pu-index-grid { grid-template-columns: repeat(3, 1fr); }
  body.ep .p-decoder-grid { grid-template-columns: repeat(3, 1fr); }
  body.ep .pu-ov-grid > .pu-card.pu-break { grid-column-start: auto; }
  body.ep .pu-idx-cols { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  body.ep .pu-cat-pair { grid-template-columns: 1fr; gap: 20px; margin-top: 44px; }
  body.ep .pu-cat-pair > .pu-cat { min-width: 0; }
  body.ep .p-notice-content { grid-template-columns: 1fr; gap: 18px; }
  body.ep .pu-idx-row { grid-template-columns: 1fr; gap: 8px; }
  body.ep .pu-idx-row .pu-index-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  body.ep .pu-index { margin-top: 26px; }
  body.ep .pu-index-grid { grid-template-columns: repeat(2, 1fr); column-gap: 18px; }
  body.ep .pu-index-grid a { padding: 9px 2px; font-size: 12.5px; }
  body.ep .pu-sec { padding: 26px 0; }
  /* 窄屏不再单独缩小，跟随全站大标题的 clamp 下限 */
  body.ep .pu-cat-name { font-size: clamp(24px, 2.6vw, 32px); }
  body.ep .pu-ov-grid { grid-template-columns: 1fr; gap: 16px; }
  body.ep .pu-card { grid-template-columns: minmax(0, 96px) minmax(0, 1fr); gap: 14px; padding: 16px; min-width: 0; }
  body.ep .pu-cat-pair .pu-card { grid-template-columns: minmax(0, 132px) minmax(0, 1fr); }
  body.ep .pu-cat-pair .pu-model { white-space: normal; }
  body.ep .pu-card-img { height: 126px; }
  body.ep .pu-card-img img { max-height: 108px; }
  body.ep .pu-detail { padding: 38px 0 42px; }
  body.ep .pu-d-head { margin-bottom: 22px; }
  body.ep .pu-d-grid .p-stage { height: 240px; padding: 16px; }
  body.ep .pu-d-grid .p-main-img { max-height: 204px; }
  body.ep .pu-detail .p-spec-wrap { margin-top: 24px; }
  body.ep .pu-detail .p-kpi-strip { grid-template-columns: repeat(2, 1fr); }
  body.ep .pu-detail .p-kpi:nth-child(n+3) { border-top: 1px solid var(--ep-line-light); }
  body.ep .pu-detail .p-feats { grid-template-columns: 1fr; }
  body.ep .p-decoder { padding: 24px 20px; }
  body.ep .p-decoder-grid { grid-template-columns: repeat(2, 1fr); }
  body.ep .pu-idx-row .pu-index-grid { grid-template-columns: 1fr; }
  body.ep .pu-more { opacity: 1; transform: none; }
}