/* ============================================================
   长春聚仁电气有限公司 — 企业官网样式
   工业风 · 深蓝 + 安全橙
   ============================================================ */

:root {
  --bg-dark: #0b1622;
  --bg-dark-2: #10202f;
  --paper: #f6f7f9;
  --white: #ffffff;
  --ink: #101820;
  --body: #3c4a57;
  --muted: #6b7987;
  --line: #e4e8ec;
  --line-dark: rgba(255, 255, 255, 0.12);
  --accent: #ff6b2c;
  --accent-dark: #e5551a;
  --blue: #2f7fd1;
  --radius: 6px;
  --container: 1200px;
  --header-h: 72px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --num: "Bahnschrift", "DIN Alternate", "Arial Narrow", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--body);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 通用文字 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.25em;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--accent);
}
.eyebrow.on-dark { color: #ffb28c; }
.eyebrow.on-dark::before { background: var(--accent); }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.3; font-weight: 700; }
.on-dark h1, .on-dark h2, .on-dark h3 { color: #fff; }

.sec-title {
  font-size: clamp(26px, 3.4vw, 40px);
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}
.sec-sub { color: var(--muted); max-width: 640px; }
.on-dark .sec-sub { color: rgba(255, 255, 255, 0.62); }

.num { font-family: var(--num); font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  font-family: var(--font);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(255, 107, 44, 0.35); }
.btn-ghost { border-color: rgba(255, 255, 255, 0.4); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }
.btn-line { border-color: var(--ink); color: var(--ink); }
.btn-line:hover { background: var(--ink); color: #fff; }

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  transition: background 0.3s ease, box-shadow 0.3s ease, height 0.3s ease;
}
.header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header.solid {
  background: rgba(11, 22, 34, 0.92);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--line-dark);
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo svg, .logo .logo-mark { width: 46px; height: 46px; flex: none; object-fit: contain; }
.logo-text { line-height: 1.2; }
.logo-cn { display: block; color: #6D9C2E; font-size: 19px; font-weight: 700; letter-spacing: 0.08em; }
.logo-en { display: block; color: #E3842A; font-size: 10px; letter-spacing: 0.32em; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  padding: 8px 16px;
  letter-spacing: 0.06em;
  transition: color 0.2s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 2px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav a:hover, .nav a.active { color: #fff; }
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }
.nav-cta { margin-left: 16px; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  width: 40px; height: 40px;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 8px; right: 8px;
  height: 2px;
  background: #fff;
  transition: all 0.3s ease;
}
.nav-toggle span:nth-child(1) { top: 13px; }
.nav-toggle span:nth-child(2) { top: 19px; }
.nav-toggle span:nth-child(3) { top: 25px; }
.nav-toggle.open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  overflow: hidden;
  padding-bottom: 96px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url("../img/hero.png") center / cover no-repeat;
  opacity: 0.45;
  transform: scale(1.04);
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(11, 22, 34, 0.95) 20%, rgba(11, 22, 34, 0.55) 60%, rgba(11, 22, 34, 0.35));
}
.hero .container { position: relative; padding-top: var(--header-h); }
.hero-inner { max-width: 720px; padding: 90px 0 110px; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 0.3em;
  border: 1px solid rgba(255, 107, 44, 0.45);
  padding: 8px 18px;
  border-radius: 999px;
  margin-bottom: 30px;
}
.hero-kicker .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.6s infinite;
}
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 44, 0.5); } 50% { box-shadow: 0 0 0 7px rgba(255, 107, 44, 0); } }

.hero h1 {
  color: #fff;
  font-size: clamp(34px, 5.4vw, 62px);
  line-height: 1.22;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead {
  color: rgba(255, 255, 255, 0.72);
  font-size: 17px;
  max-width: 560px;
  margin-bottom: 42px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-strip {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  border-top: 1px solid var(--line-dark);
  background: rgba(11, 22, 34, 0.6);
  backdrop-filter: blur(6px);
}
.hero-strip .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-top: 0; padding-bottom: 0;
}
.hero-stat {
  padding: 26px 0 22px;
  border-left: 1px solid var(--line-dark);
  padding-left: 28px;
}
.hero-stat:first-child { border-left: 0; padding-left: 0; }
.hero-stat .val { font-size: 32px; color: #fff; font-weight: 600; }
.hero-stat .val i { font-style: normal; color: var(--accent); font-size: 20px; margin-left: 2px; }
.hero-stat .lbl { font-size: 13px; color: rgba(255, 255, 255, 0.55); letter-spacing: 0.1em; margin-top: 2px; }

/* ---------- 区块通用 ---------- */
.section { padding: 96px 0; }
.section.dark { background: var(--bg-dark); }
.section.tint { background: #eef1f4; }
.sec-head { margin-bottom: 52px; }
.sec-head.center { text-align: center; }
.sec-head.center .sec-sub { margin: 0 auto; }
.sec-head.row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

/* ---------- 首页：业务总览 ---------- */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.biz-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 38px 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.biz-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent 70%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.biz-card:hover { transform: translateY(-6px); box-shadow: 0 22px 44px rgba(16, 24, 32, 0.1); border-color: transparent; }
.biz-card:hover::before { transform: scaleX(1); }
.biz-ico {
  width: 56px; height: 56px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #17293a, #0b1622);
  margin-bottom: 22px;
}
.biz-ico svg { width: 28px; height: 28px; stroke: var(--accent); fill: none; stroke-width: 1.6; }
.biz-card h3 { font-size: 20px; margin-bottom: 10px; letter-spacing: 0.03em; }
.biz-card p { font-size: 14.5px; color: var(--muted); }
.biz-card .idx {
  position: absolute;
  right: 22px; top: 24px;
  font-family: var(--num);
  font-size: 40px;
  color: rgba(16, 24, 32, 0.07);
  font-weight: 700;
}

/* ---------- 首页：产品速览 ---------- */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.prod-item {
  background: var(--bg-dark-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: border-color 0.3s, background 0.3s, transform 0.3s;
}
.prod-item:hover { border-color: rgba(255, 107, 44, 0.55); background: #14273a; transform: translateY(-4px); }
.prod-item .tag {
  font-family: var(--num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent);
  display: block;
  margin-bottom: 14px;
}
.prod-item h3 { color: #fff; font-size: 17px; margin-bottom: 10px; }
.prod-item p { color: rgba(255, 255, 255, 0.55); font-size: 13.5px; }

/* ---------- 关于（图文分栏） ---------- */
.split {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
}
.split-media { position: relative; }
.split-media img { border-radius: var(--radius); width: 100%; }
.split-media .stamp {
  position: absolute;
  right: -18px; bottom: -22px;
  background: var(--accent);
  color: #fff;
  padding: 22px 26px;
  border-radius: var(--radius);
  box-shadow: 0 18px 36px rgba(229, 85, 26, 0.35);
}
.split-media .stamp .n { font-family: var(--num); font-size: 34px; font-weight: 700; line-height: 1; }
.split-media .stamp .t { font-size: 12px; letter-spacing: 0.15em; margin-top: 4px; opacity: 0.9; }

.feature-list { margin-top: 28px; display: grid; gap: 18px; }
.feature-list li { display: flex; gap: 16px; align-items: flex-start; }
.feature-list .fi {
  flex: none;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(255, 107, 44, 0.12);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 700;
}
.feature-list b { display: block; color: var(--ink); font-size: 15.5px; }
.feature-list span { font-size: 14px; color: var(--muted); }

/* ---------- 数据带 ---------- */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.metric {
  padding: 44px 20px;
  text-align: center;
  border-left: 1px solid var(--line-dark);
}
.metric:first-child { border-left: 0; }
.metric .v { font-family: var(--num); font-size: 46px; color: #fff; font-weight: 700; line-height: 1.1; }
.metric .v i { font-style: normal; color: var(--accent); font-size: 26px; }
.metric .k { margin-top: 8px; color: rgba(255, 255, 255, 0.55); font-size: 14px; letter-spacing: 0.12em; }

/* ---------- 流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 30px 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.step .no {
  font-family: var(--num);
  font-size: 15px;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 14px;
  display: block;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--muted); }
.step::after {
  content: "→";
  position: absolute;
  right: -20px; top: 50%;
  transform: translateY(-50%);
  color: #b8c2cc;
  font-size: 18px;
  z-index: 1;
}
.step:last-child::after { display: none; }

/* ---------- 案例 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-dark-2);
}
.case-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, opacity 0.4s;
}
.case-card:hover img { transform: scale(1.06); opacity: 0.55; }
.case-card .cap {
  position: absolute;
  inset: auto 0 0 0;
  padding: 24px;
  background: linear-gradient(transparent, rgba(11, 22, 34, 0.92));
  color: #fff;
}
.case-card .cap b { display: block; font-size: 17px; margin-bottom: 4px; }
.case-card .cap span { font-size: 13px; color: rgba(255, 255, 255, 0.7); letter-spacing: 0.06em; }

/* ---------- CTA ---------- */
.cta {
  position: relative;
  background: var(--bg-dark);
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 85% 20%, rgba(255, 107, 44, 0.18), transparent),
    radial-gradient(500px 300px at 10% 90%, rgba(47, 127, 209, 0.15), transparent);
}
.cta-inner {
  position: relative;
  text-align: center;
  padding: 110px 24px;
}
.cta h2 { font-size: clamp(26px, 3.6vw, 42px); color: #fff; letter-spacing: 0.04em; margin-bottom: 16px; }
.cta p { color: rgba(255, 255, 255, 0.6); margin-bottom: 40px; }

/* ---------- 页脚 ---------- */
.footer {
  background: #08111b;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding: 72px 0 56px;
}
.footer h4 { color: #fff; font-size: 15px; letter-spacing: 0.12em; margin-bottom: 22px; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { color: rgba(255, 255, 255, 0.6); transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }
.footer .logo { margin-bottom: 20px; }
.footer-about { max-width: 300px; line-height: 1.9; }
.footer-contact li { display: flex; gap: 12px; margin-bottom: 14px; line-height: 1.7; }
.footer-contact .ic { color: var(--accent); flex: none; }
.footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ---------- 页头（内页） ---------- */
.page-hero {
  background: var(--bg-dark);
  padding: calc(var(--header-h) + 90px) 0 80px;
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.25;
  mask-image: linear-gradient(90deg, transparent, #000 70%);
}
.page-hero .container { position: relative; }
.page-hero h1 { color: #fff; font-size: clamp(30px, 4vw, 48px); letter-spacing: 0.06em; }
.page-hero .crumb { color: rgba(255, 255, 255, 0.5); font-size: 13px; letter-spacing: 0.14em; margin-bottom: 18px; }
.page-hero .crumb i { font-style: normal; color: var(--accent); margin: 0 10px; }
.page-hero p { color: rgba(255, 255, 255, 0.6); max-width: 620px; margin-top: 16px; }

/* ---------- 产品详情页 ---------- */
.cat-block { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 64px 0; }
.cat-block + .cat-block { border-top: 1px solid var(--line); }
.cat-block.rev .cat-media { order: 2; }
.cat-media img { border-radius: var(--radius); box-shadow: 0 24px 48px rgba(16, 24, 32, 0.14); }
.cat-media img.plain { box-shadow: none; border: 1px solid var(--line); }
.chip-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.chip {
  font-size: 13px;
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--body);
}
.spec-table { width: 100%; border-collapse: collapse; margin-top: 24px; font-size: 14px; }
.spec-table th, .spec-table td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.spec-table th { background: #eef1f4; color: var(--ink); font-weight: 600; width: 130px; }

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 56px;
}
.info-cards { display: grid; gap: 18px; }
.info-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  display: flex;
  gap: 18px;
}
.info-card .ic {
  flex: none;
  width: 46px; height: 46px;
  border-radius: 8px;
  background: linear-gradient(135deg, #17293a, #0b1622);
  display: grid;
  place-items: center;
}
.info-card .ic svg { width: 22px; height: 22px; stroke: var(--accent); fill: none; stroke-width: 1.7; }
.info-card b { display: block; color: var(--ink); font-size: 15px; margin-bottom: 4px; }
.info-card p { font-size: 14px; color: var(--muted); }

.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 13.5px; color: var(--ink); font-weight: 600; letter-spacing: 0.04em; }
.form-field input, .form-field textarea, .form-field select {
  font-family: var(--font);
  font-size: 14.5px;
  padding: 13px 15px;
  border: 1px solid #d5dbe1;
  border-radius: 4px;
  background: #fafbfc;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  resize: vertical;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.14);
  background: #fff;
}
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 14px; }
.form-ok {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 4px;
  background: #e8f6ec;
  border: 1px solid #bfe5cb;
  color: #22753c;
  font-size: 14px;
}
.map-box {
  margin-top: 56px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}
.map-box .bar { padding: 18px 26px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.map-box .bar b { color: var(--ink); }
.map-box .bar a { color: var(--accent); font-size: 14px; }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.2s; }
.reveal.d3 { transition-delay: 0.3s; }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: 0;
  cursor: pointer;
  font-size: 18px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: all 0.3s ease;
  z-index: 90;
  box-shadow: 0 10px 24px rgba(255, 107, 44, 0.4);
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }

/* ---------- 列数工具类（优先于默认栅格） ---------- */
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1024px) {
  .cols-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .cols-2, .cols-3 { grid-template-columns: 1fr; }
}

/* ---------- 寄语 / 致辞 ---------- */
.quote-sec {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0b1622 0%, #16283a 55%, #0b1622 100%);
}
.quote-sec::before {
  content: "\201C";
  position: absolute;
  top: -60px;
  left: 4%;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 300px;
  line-height: 1;
  color: rgba(255, 107, 44, 0.09);
  pointer-events: none;
}
.quote-inner {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 92px 0;
}
.quote-tag {
  text-align: center;
  color: #fff;
  font-size: clamp(22px, 3vw, 34px);
  letter-spacing: 0.22em;
  font-weight: 700;
  margin-bottom: 8px;
}
.quote-tag em { font-style: normal; color: var(--accent); }
.quote-sub {
  text-align: center;
  color: rgba(255, 255, 255, 0.42);
  font-size: 12.5px;
  letter-spacing: 0.3em;
  margin-bottom: 40px;
}
.quote-text {
  color: rgba(255, 255, 255, 0.8);
  font-size: 16.5px;
  line-height: 2.15;
  text-align: justify;
  padding: 0 4px;
}
.quote-text p + p { margin-top: 18px; }
.quote-src {
  margin-top: 34px;
  text-align: right;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.16em;
}

/* ---------- 工艺图示 ---------- */
.diagram-fig {
  margin: 36px 0 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 20px 10px;
  box-shadow: 0 18px 36px rgba(16, 24, 32, .08);
}
.diagram-fig img { width: 100%; display: block; }
.diagram-fig figcaption { font-size: 13px; color: var(--muted); text-align: center; padding: 14px 8px 10px; line-height: 1.7; }
.diagram-fig + .dev-wall { margin-top: 18px; }

/* ---------- 器件实拍墙 ---------- */
.dev-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 36px; }
.dev-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .4s ease, box-shadow .4s ease;
}
.dev-card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px rgba(16, 24, 32, .13); }
.dev-card .ph { aspect-ratio: 4 / 3; overflow: hidden; background: #eef1f4; }
.dev-card .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s ease; }
.dev-card:hover .ph img { transform: scale(1.06); }
.dev-card .tx { padding: 16px 18px 20px; }
.dev-card .tag { display: inline-block; font-size: 11px; letter-spacing: .14em; color: var(--accent); margin-bottom: 8px; }
.dev-card .tx h3 { font-size: 15px; color: var(--ink); margin-bottom: 6px; letter-spacing: .02em; }
.dev-card .tx p { font-size: 13px; color: var(--muted); line-height: 1.7; }

/* 品牌平台卡（深色） */
.dev-card.brand-card {
  background: linear-gradient(160deg, #122436, #0b1622);
  border-color: #1c2c3d;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 214px;
}
.dev-card.brand-card .bc-body { padding: 24px; text-align: center; }
.dev-card.brand-card .tag { color: var(--accent); opacity: .9; }
.dev-card.brand-card h3 {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .06em;
  margin: 4px 0 10px;
}
.dev-card.brand-card p {
  font-size: 12px;
  color: rgba(255, 255, 255, .52);
  letter-spacing: .1em;
}
.dev-card.brand-card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px rgba(16, 24, 32, .18); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .biz-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
  .hero-strip .container { grid-template-columns: repeat(2, 1fr); row-gap: 0; }
  .hero-stat:nth-child(3) { border-left: 0; padding-left: 0; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .split, .cat-block, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .cat-block.rev .cat-media { order: 0; }
  .split-media .stamp { right: 12px; }
  .dev-wall { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .section { padding: 68px 0; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(11, 22, 34, 0.98);
    backdrop-filter: blur(12px);
    padding: 16px 24px 28px;
    gap: 2px;
    border-top: 1px solid var(--line-dark);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 14px 4px; border-bottom: 1px solid var(--line-dark); font-size: 16px; }
  .nav a::after { display: none; }
  .nav-cta { margin: 18px 0 0; }
  .nav-toggle { display: block; }
  .hero { min-height: 0; padding-bottom: 0; }
  .hero-inner { padding: 60px 0 140px; }
  .hero-strip { position: relative; background: var(--bg-dark); }
  .hero-strip .container { grid-template-columns: 1fr 1fr; }
  .hero-stat { padding: 18px 0 14px; }
  .hero-stat:nth-child(odd) { border-left: 0; padding-left: 0; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metric:nth-child(3) { border-left: 0; }
  .metric { border-top: 1px solid var(--line-dark); }
  .metric:nth-child(-n+2) { border-top: 0; }
  .biz-grid, .case-grid, .prod-grid, .steps { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 36px; padding: 52px 0 40px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-card { padding: 28px 22px; }
  .hero-stat .val { font-size: 24px; }
}

/* 正文中公司名品牌绿高亮 */
.brand-name { color: #6D9C2E; font-weight: 600; font-style: normal; }