/* ==========================================================================
   复盛空压机 · 上海复方机电有限公司  零依赖样式系统
   变量 → 布局 → 组件 → 页面 → 响应式
   ========================================================================== */

:root {
  --ink: #10151c;
  --ink-2: #333d4a;
  --ink-3: #5b6674;
  --ink-4: #8a94a3;
  --line: #e3e8ef;
  --line-2: #eef2f7;
  --bg: #ffffff;
  --bg-2: #f6f8fb;
  --bg-3: #eef2f7;

  --brand: #c8102e;
  --brand-d: #9c0c24;
  --brand-l: #e8294a;
  --brand-wash: #fdf2f4;

  --navy: #0b1b2e;
  --navy-2: #12283f;
  --navy-3: #1c3a58;

  --ok: #0d8a4f;
  --warn: #c47b00;

  --wrap: 1240px;
  --hd-h: 76px;
  --nav-pad: 11px;
  --r: 4px;
  --r-l: 8px;
  --sh-1: 0 1px 2px rgba(16, 21, 28, .05);
  --sh-2: 0 4px 16px rgba(16, 21, 28, .08);
  --sh-3: 0 14px 44px rgba(16, 21, 28, .13);

  --font: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei UI",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC",
    "Hiragino Sans GB", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-num: "Segoe UI", "Helvetica Neue", Arial, var(--font);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

[id], a { scroll-margin-top: 92px; }

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.34;
  letter-spacing: -.2px;
}
h1 { font-size: 30px; }
h2 { font-size: 23px; }
h3 { font-size: 18px; }
h4 { font-size: 16px; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--ink-2); text-decoration: none; transition: color .2s; }
a:hover { color: var(--brand); }
img { max-width: 100%; height: auto; display: block; border: 0; }
ul, ol { margin: 0 0 1em; padding-left: 1.4em; }
li { margin-bottom: .4em; }
strong { color: var(--ink); font-weight: 700; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ============================== 顶栏 ============================== */
.topbar {
  background: var(--navy);
  color: #93a3b5;
  font-size: 12.5px;
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; min-height: 38px;
}
.topbar-slogan { letter-spacing: .3px; }
.topbar-right { display: flex; align-items: center; gap: 20px; }
.topbar a { color: #c2cede; }
.topbar a:hover { color: #fff; }
.tb-tel { color: #fff; font-family: var(--font-num); font-weight: 700; font-size: 14px; }

/* ============================== 头部导航 ============================== */
.site-header {
  position: sticky; top: 0; z-index: 200;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: var(--sh-1);
}
.header-inner {
  display: flex; align-items: center; gap: 26px;
  height: var(--hd-h);
}
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand img { height: 38px; width: auto; }
.brand-txt { display: flex; flex-direction: column; line-height: 1.2; }
.brand-txt b { color: var(--ink); font-size: 15.5px; letter-spacing: -.2px; }
.brand-txt span { color: var(--ink-4); font-size: 11px; letter-spacing: .4px; }

.nav { margin-left: auto; display: flex; align-items: stretch; height: var(--hd-h); }
.nav > li { position: relative; list-style: none; }
.nav > li > a {
  position: relative;
  display: flex; align-items: center; gap: 5px;
  height: var(--hd-h);
  padding: 0 var(--nav-pad);
  font-size: 15px; font-weight: 700; color: var(--ink);
  white-space: nowrap;
  background-image: linear-gradient(180deg, transparent, rgba(31, 111, 178, .10));
  background-repeat: no-repeat; background-position: center bottom;
  background-size: 100% 0;
  transition: background-size .32s cubic-bezier(.4, .8, .74, 1);
}
.nav > li > a::after {
  content: ""; position: absolute;
  left: var(--nav-pad); right: var(--nav-pad); bottom: 0;
  height: 3px; background: var(--brand);
  transform: scaleX(0); transform-origin: right center;
  transition: transform .34s cubic-bezier(.65, .05, .36, 1);
}
.nav > li > a:hover,
.nav > li > a.active { color: var(--brand); }
.nav > li > a:hover::after,
.nav > li > a.active::after { transform: scaleX(1); transform-origin: left center; }
.nav > li > a:hover { background-size: 100% 100%; }

.nav-chev {
  width: 7px; height: 7px; flex-shrink: 0;
  border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform .3s cubic-bezier(.4, .8, .74, 1);
}
.nav > li:hover .nav-chev { transform: rotate(225deg) translateY(-2px); }

.dropdown {
  position: absolute; top: 100%; right: 0; z-index: 30;
  width: 660px; padding: 0;
  background: #fff; border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  border-radius: 0 0 var(--r) var(--r);
  box-shadow: var(--sh-3);
  opacity: 0; visibility: hidden; transform: translateY(-10px);
  transition: opacity .24s cubic-bezier(.48, .04, .52, .96),
    transform .24s cubic-bezier(.48, .04, .52, .96),
    visibility 0s linear .24s;
}
.nav > li:hover .dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
  transition-delay: 0s;
}
/* 双列分组面板：每列若干「大类标题 + 分类链接」分组 */
.dd-cols { display: grid; grid-template-columns: 1fr 1fr; }
.dd-col { padding: 14px 0 10px; min-width: 0; }
.dd-col + .dd-col { border-left: 1px solid var(--line); }
.dd-group { padding: 0 18px 12px; }
.dd-group + .dd-group { padding-top: 10px; }
.dd-h {
  position: relative; display: flex !important;
  align-items: baseline; gap: 7px;
  padding: 5px 10px 6px !important;
  font-size: 14.5px !important; font-weight: 700; color: var(--ink) !important;
  border-bottom: 1px solid var(--line-2); margin-bottom: 4px;
}
.dd-h::before { display: none !important; }
.dd-h:hover { color: var(--brand) !important; background: transparent !important; }
.dd-n {
  font-size: 11px; font-weight: 400; color: var(--ink-3);
  letter-spacing: .3px;
}
.dd-s {
  position: relative; display: block !important;
  padding: 6px 10px 6px 20px !important;
  font-size: 13.5px !important; color: var(--ink-2) !important;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.dd-s::before {
  content: "" !important; position: absolute;
  left: 9px; top: 50%; width: 4px; height: 4px !important;
  border-radius: 50%; background: var(--line-2);
  transform: translateY(-50%); transition: background .2s, transform .2s;
}
.dd-s:hover { color: var(--brand) !important; background: var(--brand-wash) !important; }
.dd-s:hover::before { background: var(--brand) !important; transform: translateY(-50%) scale(1.3); }
.dd-all {
  display: block !important; position: static !important;
  padding: 11px 20px !important;
  font-size: 13.5px !important; font-weight: 600; text-align: center;
  color: var(--brand) !important;
  background: var(--brand-wash);
  border-top: 1px solid var(--line-2);
  border-radius: 0 0 var(--r) var(--r);
}
.dd-all::before { display: none !important; }
.dd-all:hover { background: var(--brand) !important; color: #fff !important; }
.dd-all-row { display: flex; }
.dd-all-row .dd-all { flex: 1 1 50%; }
.dd-all-row .dd-all + .dd-all { border-left: 1px solid var(--line-2); }

.nav-toggle {
  display: none; width: 42px; height: 42px; margin-left: auto;
  background: none; border: 1px solid var(--line); border-radius: var(--r);
  cursor: pointer; padding: 0;
}
.nav-toggle span {
  display: block; width: 20px; height: 2px; margin: 4px auto;
  background: var(--ink); border-radius: 2px;
  transition: transform .3s, opacity .2s;
}
.nav-toggle.on span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.on span:nth-child(2) { opacity: 0; }
.nav-toggle.on span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ============================== 页头 Hero ============================== */
.hero {
  position: relative; overflow: hidden;
  min-height: 520px; background: var(--navy);
  display: flex; align-items: center;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-mask {
  position: absolute; inset: 0;
  background: linear-gradient(100deg,
    rgba(4, 18, 36, .96) 0%, rgba(5, 22, 42, .94) 34%,
    rgba(6, 28, 52, .86) 52%, rgba(8, 36, 64, .48) 72%,
    rgba(10, 44, 78, .16) 88%, rgba(12, 50, 88, .06) 100%);
}
.hero-inner {
  position: relative; z-index: 2; width: 100%;
  padding-top: 84px; padding-bottom: 84px;
}
.hero-copy { max-width: 560px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 13px; margin-bottom: 20px;
  font-size: 12px; font-weight: 700; letter-spacing: 2.4px;
  color: #fff; background: rgba(200, 16, 46, .9);
  border-radius: 2px;
}
.hero h1 { color: #fff; font-size: 42px; line-height: 1.24; }
.hero-sub {
  margin: 18px 0 0; color: #c6d3e0; font-size: 16.5px; line-height: 1.85;
  max-width: 520px;
}
.hero-acts { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 0 26px;
  font-size: 15px; font-weight: 700;
  border: 1px solid transparent; border-radius: var(--r);
  cursor: pointer; transition: background .22s, color .22s, border-color .22s, transform .22s;
}
.btn:hover { transform: translateY(-1px); }
.btn-p { background: var(--brand); color: #fff; }
.btn-p:hover { background: var(--brand-d); color: #fff; }
.btn-o { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-o:hover { background: var(--ink); color: #fff; }
.btn-w { background: #fff; color: var(--navy); }
.btn-w:hover { background: #e9eef4; color: var(--navy); }
.btn-g { border-color: rgba(255, 255, 255, .5); color: #fff; }
.btn-g:hover { background: rgba(255, 255, 255, .14); color: #fff; border-color: #fff; }

.hero-stats {
  display: flex; flex-wrap: wrap; gap: 12px 46px; margin-top: 44px;
  padding-top: 26px; border-top: 1px solid rgba(255, 255, 255, .18);
}
.hero-stat b {
  display: block; color: #fff; font-size: 30px; line-height: 1.2;
  font-family: var(--font-num);
}
.hero-stat span { color: #9db0c2; font-size: 13px; }

/* 页头（内页） */
.page-head {
  position: relative; overflow: hidden;
  background: var(--navy); color: #fff;
  padding-top: 46px; padding-bottom: 46px;
}
.page-head-bg { position: absolute; inset: 0; }
.page-head-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .3; }
.page-head-mask {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(6, 20, 38, .95), rgba(8, 28, 50, .82));
}
.page-head .wrap { position: relative; z-index: 2; }
.page-head h1 { color: #fff; font-size: 32px; }
.page-head p { margin: 12px 0 0; color: #b6c5d4; max-width: 760px; }

.crumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-size: 13px; color: #94a6b8; margin-bottom: 16px;
}
.crumbs a { color: #c3d0dd; }
.crumbs a:hover { color: #fff; }
.crumbs .sep { color: #55677a; }
.crumbs [aria-current] { color: #fff; font-weight: 700; }

/* ============================== 区块 ============================== */
.sec { padding: 72px 0; }
.sec-2 { background: var(--bg-2); }
.sec-nav { background: var(--navy); }
.sec-tight { padding: 52px 0; }

.sec-head { margin-bottom: 40px; max-width: 780px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-eyebrow {
  display: block; margin-bottom: 10px;
  font-size: 12px; font-weight: 700; letter-spacing: 2.6px;
  color: var(--brand); text-transform: uppercase;
}
.sec-head h1, .sec-head h2 { letter-spacing: -.4px; }
.sec-head p { margin: 12px 0 0; color: var(--ink-3); font-size: 15.5px; }
.sec-head-row {
  display: flex; flex-wrap: wrap; align-items: flex-end;
  justify-content: space-between; gap: 18px; margin-bottom: 34px;
}
.sec-head-row .sec-head { margin-bottom: 0; }

/* ============================== 网格与卡片 ============================== */
.grid { display: grid; gap: 26px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

.card {
  display: flex; flex-direction: column; height: 100%;
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-l); overflow: hidden;
  transition: box-shadow .28s, transform .28s, border-color .28s;
}
.card:hover {
  transform: translateY(-3px); border-color: transparent;
  box-shadow: var(--sh-3);
}
.card-media {
  position: relative; display: block; overflow: hidden;
  aspect-ratio: 4 / 3; background: var(--bg-3);
}
.card-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s cubic-bezier(.2, .7, .3, 1);
}
.card:hover .card-media img { transform: scale(1.05); }
.card-tag {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  padding: 3px 9px; font-size: 11.5px; font-weight: 700;
  color: #fff; background: rgba(11, 27, 46, .82);
  border-radius: 2px; letter-spacing: .3px;
}
.card-body { display: flex; flex-direction: column; flex: 1; padding: 20px 20px 18px; }
.card-body h3 { font-size: 16.5px; }
.card-body h3 a { color: var(--ink); }
.card-body h3 a:hover { color: var(--brand); }
.card-body p { margin: 9px 0 0; color: var(--ink-3); font-size: 13.5px; line-height: 1.72; }
.card-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin-top: auto; padding-top: 15px; border-top: 1px solid var(--line-2);
  font-size: 13px; color: var(--ink-4);
}
.card-more { color: var(--brand); font-weight: 700; }

.spec-mini {
  display: flex; flex-wrap: wrap; gap: 5px 8px; margin-top: 12px;
}
.spec-mini span {
  padding: 2px 8px; font-size: 11.5px; color: var(--ink-3);
  background: var(--bg-2); border: 1px solid var(--line-2);
  border-radius: 2px; font-family: var(--font-num);
}

/* 分类卡（大图） */
.cat-grid { display: grid; gap: 24px; grid-template-columns: repeat(3, 1fr); }
.cat-card {
  position: relative; display: flex; align-items: flex-end;
  min-height: 300px; overflow: hidden;
  border-radius: var(--r-l);
}
.cat-card img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; transition: transform .55s cubic-bezier(.2, .7, .3, 1);
}
.cat-card:hover img { transform: scale(1.06); }
.cat-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6, 22, 40, .05) 0%, rgba(6, 22, 40, .55) 52%, rgba(5, 18, 34, .93) 100%);
}
.cat-card-txt { position: relative; z-index: 2; padding: 24px; width: 100%; }
.cat-card h3 { color: #fff; font-size: 20px; }
.cat-card p { margin: 7px 0 0; color: #b8c7d6; font-size: 13.5px; }
.cat-card .cat-n {
  position: absolute; z-index: 2; top: 18px; right: 20px;
  font-size: 34px; font-weight: 700; color: rgba(255, 255, 255, .26);
  font-family: var(--font-num); line-height: 1;
}
/* 卡内单位说明：区分「款」与「篇」，避免内容栏目显示成 00 */
.cat-card-n {
  display: inline-block; margin-top: 10px; padding: 2px 9px;
  font-size: 12px; color: #dbe5ef;
  background: rgba(255, 255, 255, .13);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 999px;
}

/* 特性卡 */
.feat { display: flex; gap: 15px; }
.feat-ic {
  flex-shrink: 0; width: 46px; height: 46px;
  display: grid; place-items: center;
  background: var(--brand-wash); color: var(--brand);
  border-radius: var(--r); font-size: 20px; font-weight: 700;
  font-family: var(--font-num);
}
.feat h3 { font-size: 16px; }
.feat p { margin: 6px 0 0; color: var(--ink-3); font-size: 13.5px; }

/* 流程步骤 */
.steps { display: grid; gap: 24px; grid-template-columns: repeat(4, 1fr); }
.step {
  position: relative; padding: 26px 22px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-l);
}
.step-n {
  font-size: 13px; font-weight: 700; color: var(--brand);
  letter-spacing: 2px; font-family: var(--font-num);
}
.step h3 { margin: 9px 0 0; font-size: 17px; }
.step p { margin: 9px 0 0; color: var(--ink-3); font-size: 13.5px; }

/* CTA 条 */
.cta-band {
  position: relative; overflow: hidden;
  background: var(--navy); color: #fff;
}
.cta-band-bg { position: absolute; inset: 0; }
.cta-band-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .26; }
.cta-band .wrap { position: relative; z-index: 2; }
.cta-inner {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 26px;
  padding-top: 52px; padding-bottom: 52px;
}
.cta-inner h2 { color: #fff; font-size: 27px; }
.cta-inner p { margin: 10px 0 0; color: #b3c3d2; max-width: 640px; }
.cta-acts { display: flex; flex-wrap: wrap; gap: 13px; }

/* ============================== 筛选栏 ============================== */
.filter-bar {
  padding: 18px 20px; margin-bottom: 30px;
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--r-l);
}
.filter-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px; }
.filter-row + .filter-row { margin-top: 13px; padding-top: 13px; border-top: 1px solid var(--line); }
.filter-lb { font-size: 13px; font-weight: 700; color: var(--ink); min-width: 68px; }
.chip {
  padding: 4px 13px; font-size: 13px; cursor: pointer;
  background: #fff; border: 1px solid var(--line);
  border-radius: 100px; color: var(--ink-3);
  transition: all .2s; user-select: none;
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.on { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 700; }
.filter-count { margin-left: auto; font-size: 13px; color: var(--ink-4); }
.filter-count b { color: var(--ink); font-family: var(--font-num); }

/* ============================== 产品详情 ============================== */
.pd-hero { background: var(--bg-2); border-bottom: 1px solid var(--line); }
.pd-hero-in {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 46px;
  align-items: start; padding-top: 42px; padding-bottom: 46px;
}
.pd-gallery { position: sticky; top: 96px; }
.gal-main {
  position: relative; overflow: hidden;
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-l); aspect-ratio: 4 / 3;
  cursor: zoom-in;
}
.gal-main img { width: 100%; height: 100%; object-fit: contain; padding: 14px; }
.gal-thumbs {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 9px; margin-top: 11px;
}
.gal-thumb {
  overflow: hidden; aspect-ratio: 1; cursor: pointer;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r);
  padding: 0; transition: border-color .2s, transform .2s;
}
.gal-thumb img { width: 100%; height: 100%; object-fit: cover; }
.gal-thumb:hover, .gal-thumb.on { border-color: var(--brand); transform: translateY(-2px); }
.gal-hint { margin-top: 9px; font-size: 12.5px; color: var(--ink-4); text-align: center; }

.pd-badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 4px 12px; margin-bottom: 14px;
  font-size: 12px; font-weight: 700; color: var(--brand);
  background: var(--brand-wash); border: 1px solid #f4d5db; border-radius: 2px;
}
.pd-title { font-size: 31px; letter-spacing: -.4px; }
.pd-meta {
  display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 15px 0 0;
  padding-bottom: 18px; border-bottom: 1px solid var(--line);
  font-size: 13px; color: var(--ink-4);
}
.pd-meta b { color: var(--ink-2); font-family: var(--font-num); }
.pd-lead { margin: 20px 0 0; color: var(--ink-2); font-size: 15.5px; line-height: 1.85; }
.pd-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.pd-kv {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px;
  margin-top: 26px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--r-l); overflow: hidden;
}
.pd-kv div { background: #fff; padding: 12px 15px; }
.pd-kv dt { font-size: 12px; color: var(--ink-4); }
.pd-kv dd { margin: 2px 0 0; font-size: 14.5px; font-weight: 700; color: var(--ink); font-family: var(--font-num); }

.pd-body { display: grid; grid-template-columns: 1fr 320px; gap: 46px; align-items: start; }
.pd-sec + .pd-sec { margin-top: 46px; }
.pd-sec > h2 {
  padding-bottom: 11px; margin-bottom: 20px;
  border-bottom: 2px solid var(--ink);
  font-size: 20px;
}
.pd-sec h3 { margin: 24px 0 9px; font-size: 16.5px; }
.pd-sec p { color: var(--ink-2); }
.pd-sec ul { color: var(--ink-2); }
.prose ul { padding-left: 0; list-style: none; }
.prose ul li { position: relative; padding-left: 22px; margin-bottom: 9px; }
.prose ul li::before {
  content: ""; position: absolute; left: 3px; top: 11px;
  width: 6px; height: 6px; background: var(--brand); border-radius: 50%;
}

/* 参数表 */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-l); }
table.spec { min-width: 560px; font-size: 14px; }
table.spec th, table.spec td { padding: 11px 15px; text-align: left; border-bottom: 1px solid var(--line-2); }
table.spec thead th {
  background: var(--navy); color: #fff; font-weight: 700;
  white-space: nowrap; font-size: 13.5px;
}
table.spec tbody tr:nth-child(even) { background: var(--bg-2); }
table.spec tbody tr:hover { background: var(--brand-wash); }
table.spec td:first-child { color: var(--ink); font-weight: 700; white-space: nowrap; }
table.spec td:not(:first-child) { font-family: var(--font-num); color: var(--ink-2); }
.tbl-note { margin-top: 10px; font-size: 12.5px; color: var(--ink-4); }

/* 数据可信度徽标：L1 官网逐型号实测 / L2 官网系列级区间 / L3 官网未标注 */
.lv-badge {
  display: inline-block; padding: 1px 8px; border-radius: 3px;
  font-size: 11.5px; font-weight: 700; line-height: 1.7;
  letter-spacing: .2px; white-space: nowrap; margin-right: 6px;
}
.lv-badge.ok   { background: #e6f4ec; color: #14713a; }
.lv-badge.mid  { background: #fdf1de; color: #8a5a00; }
.lv-badge.warn { background: #fdeaea; color: #a52116; }

/* 系列卡：图片比例与产品卡一致，避免总览页出现两种高度 */
.series-card .card-media { background: var(--bg-2); }
.series-card .card-media img { aspect-ratio: 4 / 3; object-fit: contain; }
table.spec tbody th[scope="row"] { font-weight: 600; }
table.spec tbody th[scope="row"] a { color: var(--ink); }
table.spec tbody th[scope="row"] a:hover { color: var(--brand); }
table.spec tbody td img { border-radius: 4px; object-fit: contain; background: #fff; }

/* 侧栏 */
.side { position: sticky; top: 96px; display: grid; gap: 20px; }
.side-box {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-l); overflow: hidden;
}
.side-h {
  padding: 13px 17px; background: var(--bg-2);
  border-bottom: 1px solid var(--line);
  font-size: 15px; font-weight: 700; color: var(--ink);
}
.side-l { list-style: none; margin: 0; padding: 6px 0; }
.side-l li { margin: 0; }
.side-l a {
  position: relative; display: flex; align-items: center; justify-content: space-between;
  gap: 10px; padding: 9px 17px; font-size: 14px;
}
.side-l a::before {
  content: ""; position: absolute; left: 0; top: 50%;
  width: 3px; height: 0; background: var(--brand);
  transform: translateY(-50%); transition: height .26s cubic-bezier(.4, .8, .74, 1);
}
.side-l a:hover { background: var(--bg-2); color: var(--brand); }
.side-l a:hover::before { height: 60%; }
.side-l a.on { color: var(--brand); font-weight: 700; background: var(--brand-wash); }
.side-l .n { color: var(--ink-4); font-size: 12.5px; font-family: var(--font-num); }
.side-body { padding: 17px; }
.side-body p { font-size: 13.5px; color: var(--ink-3); }
.side-tel { display: block; margin-top: 12px; color: var(--brand); font-size: 20px; font-weight: 700; font-family: var(--font-num); }

.side-p { display: grid; gap: 13px; padding: 17px; }
.side-p-item { display: flex; gap: 11px; }
.side-p-item img {
  width: 62px; height: 62px; flex-shrink: 0;
  object-fit: cover; border-radius: var(--r); border: 1px solid var(--line-2);
}
.side-p-item b { display: block; font-size: 14px; color: var(--ink); }
.side-p-item span { font-size: 12.5px; color: var(--ink-4); }

/* 型号表（型号锚点） */
.model-grid { display: grid; gap: 11px; grid-template-columns: repeat(auto-fill, minmax(158px, 1fr)); }
.model-cell {
  display: block; padding: 13px 14px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r);
  transition: all .22s;
}
.model-cell:hover { border-color: var(--brand); box-shadow: var(--sh-2); transform: translateY(-2px); }
.model-cell b { display: block; font-size: 14.5px; color: var(--ink); font-family: var(--font-num); }
.model-cell span { display: block; margin-top: 3px; font-size: 12.5px; color: var(--ink-4); }

/* 灯箱 */
.lightbox {
  position: fixed; inset: 0; z-index: 900;
  display: none; place-items: center; padding: 32px;
  background: rgba(6, 14, 24, .93);
}
.lightbox.on { display: grid; }
.lightbox .lb-img {
  max-width: 100%; max-height: 100%;
  border-radius: var(--r); box-shadow: var(--sh-3);
}
.lightbox-close {
  position: absolute; top: 20px; right: 24px;
  width: 44px; height: 44px; cursor: pointer;
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .3);
  border-radius: 50%; color: #fff; font-size: 24px; line-height: 1;
}
.lightbox-close:hover { background: rgba(255, 255, 255, .22); }

/* 富文本内容块 */
.prose { max-width: 100%; }
.prose h2 { margin: 34px 0 14px; font-size: 21px; }
.prose h3 { margin: 24px 0 9px; font-size: 16.5px; }
.prose p { margin: 0 0 14px; }
.prose img { margin: 18px 0; border-radius: var(--r-l); border: 1px solid var(--line); }
.prose blockquote {
  margin: 18px 0; padding: 15px 19px;
  background: var(--brand-wash); border-left: 3px solid var(--brand);
  border-radius: 0 var(--r) var(--r) 0; color: var(--ink-2);
}

/* FAQ */
.faq { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  width: 100%; padding: 17px 0; cursor: pointer;
  background: none; border: 0; text-align: left;
  font-family: inherit; font-size: 16px; font-weight: 700; color: var(--ink);
}
.faq-q:hover { color: var(--brand); }
.faq-q .pm { position: relative; flex-shrink: 0; width: 15px; height: 15px; margin-top: 6px; }
.faq-q .pm::before, .faq-q .pm::after {
  content: ""; position: absolute; background: var(--brand);
  left: 0; top: 7px; width: 15px; height: 2px;
  transition: transform .3s cubic-bezier(.4, .8, .74, 1);
}
.faq-q .pm::after { transform: rotate(90deg); }
.faq-item.on .pm::after { transform: rotate(0); }
.faq-a { display: none; padding: 0 0 19px; color: var(--ink-3); font-size: 14.5px; max-width: 860px; }
.faq-item.on .faq-a { display: block; }

/* 文章列表 */
.art-list { display: grid; gap: 18px; }
.art {
  display: grid; grid-template-columns: 216px 1fr; gap: 24px; align-items: center;
  padding: 20px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--r-l);
  transition: box-shadow .26s, transform .26s, border-color .26s;
}
.art:hover { transform: translateY(-2px); border-color: transparent; box-shadow: var(--sh-2); }
.art-media { overflow: hidden; aspect-ratio: 16 / 10; background: var(--bg-3); border-radius: var(--r); }
.art-media img { width: 100%; height: 100%; object-fit: cover; }
.art h3 { font-size: 18px; }
.art h3 a { color: var(--ink); }
.art h3 a:hover { color: var(--brand); }
.art p {
  margin: 9px 0 0; color: var(--ink-3); font-size: 14px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.art-meta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 12px; font-size: 12.5px; color: var(--ink-4); }
.art-meta .cat { color: var(--brand); font-weight: 700; }

.pager { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 7px; margin-top: 44px; }
.pager a, .pager span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; padding: 0 13px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: #fff; color: var(--ink-2); font-size: 14px;
  font-family: var(--font-num); transition: all .2s;
}
.pager a:hover { border-color: var(--brand); color: var(--brand); }
.pager .on { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 700; }
.pager .dis { color: var(--ink-4); background: var(--bg-2); }

/* ============================== 页脚 ============================== */
.site-footer { background: var(--navy); color: #9aabc0; font-size: 14px; }
.footer-top { padding: 54px 0 42px; }
/* 页脚：品牌 1.7fr + 6 个产品大类各 1fr + 联系方式 1.25fr = 8 列。
   早先写成 6 列而实际输出 8 个块，会在 1280px 以下把「配件与耗材」
   挤到第二行且对齐错位，所以这里按真实块数定列数。 */
.foot-grid {
  display: grid;
  grid-template-columns: 1.7fr repeat(6, minmax(0, 1fr)) 1.25fr;
  gap: 30px 26px;
}
.foot-brand { display: flex; align-items: center; gap: 11px; margin-bottom: 15px; }
.foot-brand img { height: 40px; }
.foot-brand b { color: #fff; font-size: 16px; }
.foot h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.foot-n {
  display: block; margin-top: 4px;
  font-size: 12px; font-weight: 400; color: #7d90a6;
  font-family: var(--font-num);
}
.foot-l { list-style: none; margin: 0; padding: 0; }
.foot-l li {
  margin-bottom: 9px;
  /* 长分类名（如「空气后处理与储气」）在 8 列布局下不截断，允许折行 */
  line-height: 1.5;
}
.foot-l a { color: #9aabc0; font-size: 13.5px; }
.foot-l a:hover { color: #fff; }
.foot-p { font-size: 13.5px; line-height: 1.9; margin: 0; }
.foot-tel {
  display: block; margin: 0 0 6px; color: #fff;
  font-size: 25px; font-weight: 700; font-family: var(--font-num); line-height: 1.3;
}
.foot-tel:hover { color: #fff; }
.foot-mail { color: #c3d0de; font-family: var(--font-num); }
.foot-mail:hover { color: #fff; }
.foot-kw { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px; }
.foot-kw a {
  padding: 3px 10px; font-size: 12.5px; color: #8fa2b6;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .09); border-radius: 2px;
}
.foot-kw a:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.footer-bot {
  padding: 18px 0; border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: 12.5px; color: #6f8298;
}
.footer-bot-in { display: flex; flex-wrap: wrap; gap: 8px 22px; justify-content: space-between; }
.footer-bot a { color: #6f8298; }
.footer-bot a:hover { color: #fff; }

/* ============================== 回到顶部 ============================== */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 300;
  width: 46px; height: 46px; cursor: pointer;
  display: grid; place-items: center;
  background: var(--ink); color: #fff;
  border: 0; border-radius: 50%;
  box-shadow: var(--sh-2);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity .3s, visibility 0s linear .3s, transform .3s, background .2s;
}
.to-top.on { opacity: 1; visibility: visible; transform: translateY(0); transition-delay: 0s; }
.to-top:hover { background: var(--brand); }
.to-top svg { width: 17px; height: 17px; }

/* ============================== 响应式 ============================== */
@media (max-width: 1180px) {
  :root { --nav-pad: 9px; }
  .header-inner { gap: 16px; }
  .nav > li > a { font-size: 14.5px; }
  /* 双列在中等屏会挤，降为单列 */
  .dropdown { width: 320px; }
  .dd-cols { grid-template-columns: 1fr; }
  .dd-col + .dd-col { border-left: 0; border-top: 1px solid var(--line-2); }
  .dd-col:first-child { padding-bottom: 4px; }
}

@media (max-width: 1024px) {
  :root { --hd-h: 66px; }
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 100%; left: 0; right: 0; z-index: 220;
    display: block; height: auto; margin: 0;
    max-height: calc(100vh - var(--hd-h)); overflow-y: auto;
    background: #fff; border-top: 1px solid var(--line);
    box-shadow: var(--sh-3);
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .26s, transform .26s, visibility 0s linear .26s;
  }
  .nav.open { opacity: 1; visibility: visible; transform: translateY(0); transition-delay: 0s; }
  .nav > li { border-bottom: 1px solid var(--line-2); }
  .nav > li > a { height: 50px; padding: 0 18px; }
  .nav > li > a::after { display: none; }
  .nav > li > a:hover, .nav > li > a.active {
    border-left: 3px solid var(--brand); background: var(--brand-wash);
  }
  .nav > li > a:hover { background-size: 100% 0; }
  .dropdown {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: 0; border-top: 1px solid var(--line-2);
    border-radius: 0; padding: 0; background: var(--bg-2);
    display: none; transition: none; width: auto;
  }
  .nav > li.open-dd .dropdown { display: block; }
  /* 移动端展开为纵向手风琴，分组标题与分类链接都放宽缩进 */
  .dd-cols { display: block; }
  .dd-col { padding: 0; }
  .dd-col + .dd-col { border-left: 0; border-top: 0; }
  .dd-group { padding: 0; }
  .dd-group + .dd-group { padding-top: 0; }
  .dd-h {
    padding: 11px 18px 8px !important; font-size: 14px !important;
    border-bottom: 0; margin-bottom: 0;
  }
  .dd-s { padding: 8px 18px 8px 34px !important; font-size: 13.5px !important; }
  .dd-s::before { left: 20px; }
  .dd-all { text-align: left; padding: 12px 18px !important; }
  .hero { min-height: 0; }
  .hero h1 { font-size: 32px; }
  .pd-hero-in { grid-template-columns: 1fr; gap: 34px; }
  .pd-gallery { position: static; }
  .pd-body { grid-template-columns: 1fr; gap: 34px; }
  .side { position: static; }
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: repeat(3, 1fr); gap: 28px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .hero-mask { background: rgba(5, 21, 40, .84); }
  .hero h1 { font-size: 27px; }
  .hero-sub { font-size: 15px; }
  .sec { padding: 54px 0; }
  .sec-tight { padding: 40px 0; }
  .g3, .g2 { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: 1fr; }
  .cta-inner { padding-top: 40px; padding-bottom: 40px; }
  .cta-inner h2 { font-size: 22px; }
  .art { grid-template-columns: 1fr; gap: 15px; }
  .page-head h1 { font-size: 25px; }
  .pd-title { font-size: 25px; }
  h1 { font-size: 25px; }
  h2 { font-size: 20px; }
  .inq { padding: 26px 22px 24px; }
  .inq-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .topbar-slogan { display: none; }
  .topbar-inner { justify-content: flex-end; }
  .brand-txt span { display: none; }
  .hero h1 { font-size: 23px; }
  .hero-inner { padding-top: 56px; padding-bottom: 56px; }
  .hero-stats { gap: 10px 26px; margin-top: 30px; }
  .hero-stat b { font-size: 24px; }
  .btn { width: 100%; }
  .hero-acts .btn, .cta-acts .btn, .pd-cta .btn { width: 100%; }
  .g4, .steps { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 22px; }
  .foot-intro { grid-column: 1 / -1; }
  .pd-kv { grid-template-columns: 1fr; }
  .gal-thumbs { grid-template-columns: repeat(4, 1fr); }
  .model-grid { grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); }
  .filter-lb { min-width: 100%; }
  .footer-bot-in { flex-direction: column; }
  .sec-head-row { flex-direction: column; align-items: flex-start; }
  .cta-acts { width: 100%; }
  .to-top { right: 14px; bottom: 14px; }
  .inq-grid { grid-template-columns: 1fr; }
  .inq-act .btn { width: 100%; }
}

/* ============================== 需求表单 ============================== */
.sec-form { background: var(--bg-2); scroll-margin-top: 96px; }
.inq {
  max-width: 940px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 34px 36px 30px;
  box-shadow: 0 2px 14px rgba(10, 24, 40, .05);
}
.inq-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px 20px;
}
.fld { display: flex; flex-direction: column; min-width: 0; }
.fld-full { grid-column: 1 / -1; }
.fld-l {
  font-size: 13.5px; font-weight: 600; color: var(--ink-2);
  margin-bottom: 7px; line-height: 1.5;
}
.req { color: var(--brand); margin-left: 3px; }
.fld input, .fld textarea, .fld select {
  width: 100%; padding: 10px 12px;
  font: inherit; font-size: 14.5px; color: var(--ink);
  background: #fff; border: 1px solid var(--line);
  border-radius: 2px; transition: border-color .16s, box-shadow .16s;
}
.fld textarea { resize: vertical; min-height: 92px; line-height: 1.7; }
.fld input::placeholder, .fld textarea::placeholder { color: var(--ink-4); }
.fld input:focus, .fld textarea:focus, .fld select:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(200, 16, 46, .10);
}
/* 蜜罐：不能 display:none —— 部分爬虫会跳过隐藏域，
   移出视口即可，既不影响无障碍也不会被填 */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.inq-tel {
  margin: 22px 0 0; padding-top: 20px;
  border-top: 1px dashed var(--line);
  font-size: 14px; color: var(--ink-3);
}
.inq-tel a { font-family: var(--font-num); font-weight: 700; color: var(--ink); }
.inq-tel a:hover { color: var(--brand); }
.inq-act { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.inq-sub { min-width: 168px; }
.inq-sub[disabled] { opacity: .62; cursor: not-allowed; }
.inq-msg {
  margin: 14px 0 0; padding: 0; min-height: 22px;
  font-size: 14px; line-height: 1.7;
}
.inq-msg.ok { color: #16794a; }
.inq-msg.warn { color: #a8620a; }
.inq-msg:empty { padding: 0; }

@media (max-width: 1180px) {
  /* 8 个块塞不进窄屏一行：品牌说明独占前两列，右侧 3+3 两列瀑布 */
  .foot-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .foot-intro { grid-column: span 2; }
  .inq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}


@media print {
  .site-header, .topbar, .site-footer, .to-top, .cta-band, .nav-toggle { display: none; }
  body { font-size: 12pt; }
  .pd-hero-in, .pd-body { grid-template-columns: 1fr; }
  a { color: var(--ink); }
  .tbl-wrap { overflow: visible; }
}