/* NBRL 荣力气动 · 门户样式（三页共用） */
:root {
  --blue: #17549c;
  --blue-dark: #0f3d73;
  --blue-light: #e8f1fa;
  --ink: #1d2733;
  --muted: #5d6a78;
  --line: #e3e8ee;
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --max: 1080px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --shadow-1: 0 2px 8px rgba(15,61,115,.06);
  --shadow-2: 0 14px 34px rgba(15,61,115,.12);
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

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

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--blue); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 15px; letter-spacing: .5px;
}
.logo-name { font-weight: 700; font-size: 17px; color: var(--blue-dark); }
.logo-name small { display: block; font-weight: 400; font-size: 11px; color: var(--muted); letter-spacing: 1px; }

.main-nav { display: flex; gap: 6px; }
.main-nav a {
  padding: 8px 14px; border-radius: 8px; font-size: 15px; color: var(--muted);
}
.main-nav a:hover { background: var(--bg-soft); color: var(--ink); }
.main-nav a.active { background: var(--blue-light); color: var(--blue); font-weight: 600; }

/* 移动端导航 */
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; cursor: pointer; }
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); margin: 4px 0; }

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; left: 0; right: 0; top: 60px;
    flex-direction: column; background: #fff; border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 10px; font-size: 16px; }
  .logo-name small { display: none; }
}

/* ---------- 首页横幅 ---------- */
.hero {
  background: var(--blue-dark) linear-gradient(135deg, #0f3d73 0%, #17549c 60%, #2b6cb5 100%);
  color: #fff;
  padding: 72px 0 76px;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center; }
.hero h1 { font-size: 34px; line-height: 1.3; font-weight: 700; }
.hero p.sub { margin-top: 14px; font-size: 18px; opacity: .92; }
.hero p.tagline { margin-top: 8px; font-size: 15px; opacity: .75; }
.hero .btns { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 8px; font-size: 16px;
  transition: opacity .15s;
}
.btn:hover { opacity: .88; }
.btn-light { background: #fff; color: var(--blue-dark); font-weight: 600; }
.btn-ghost { border: 1px solid rgba(255,255,255,.65); color: #fff; }
@media (max-width: 720px) {
  .hero { padding: 52px 0 56px; }
  .hero h1 { font-size: 26px; }
  .hero p.sub { font-size: 16px; }
  .hero-grid { grid-template-columns: 1fr; gap: 26px; }
}

/* ---------- 通用区块 ---------- */
.section { padding: 64px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 26px; font-weight: 700; color: var(--ink); }
.section-head .en { margin-top: 4px; font-size: 13px; letter-spacing: 2px; color: var(--muted); text-transform: uppercase; }
.section-head .bar { width: 44px; height: 3px; background: var(--blue); margin: 14px auto 0; border-radius: 2px; }

/* 三大业务卡 */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.biz-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 28px 24px; text-align: center;
}
.biz-card .ico {
  width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 14px;
  background: var(--blue-light); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
}
.biz-card h3 { font-size: 18px; margin-bottom: 8px; }
.biz-card p { font-size: 14.5px; color: var(--muted); }
@media (max-width: 720px) {
  .biz-grid { grid-template-columns: 1fr; }
  .section { padding: 44px 0; }
}

/* 产品速览（首页） */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.prod-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  transition: box-shadow .15s, transform .15s;
}
.prod-card:hover { box-shadow: 0 6px 20px rgba(15,61,115,.10); transform: translateY(-2px); }
.prod-card .thumb {
  height: 150px; background: var(--blue-light);
  display: flex; align-items: center; justify-content: center; color: var(--blue);
}
.prod-card .body { padding: 16px 18px 20px; }
.prod-card h3 { font-size: 17px; margin-bottom: 6px; }
.prod-card p { font-size: 14px; color: var(--muted); }
.more-line { text-align: center; margin-top: 32px; }
@media (max-width: 720px) { .prod-grid { grid-template-columns: 1fr 1fr; gap: 12px; } }
@media (max-width: 480px) { .prod-grid { grid-template-columns: 1fr; } }

/* 优势条 */
.advs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv { text-align: center; padding: 10px; }
.adv .num { font-size: 30px; font-weight: 700; color: var(--blue); }
.adv .num small { font-size: 15px; font-weight: 500; }
.adv p { margin-top: 4px; font-size: 14px; color: var(--muted); }
@media (max-width: 720px) { .advs { grid-template-columns: 1fr 1fr; } }

/* 关于简介块 */
.about-flex { display: grid; grid-template-columns: 1.2fr .8fr; gap: 36px; align-items: center; }
.about-flex p { margin-bottom: 12px; color: var(--muted); }
.about-flex p strong { color: var(--ink); }
.about-box {
  background: var(--blue-light); border-radius: 14px; padding: 26px;
  font-size: 15px;
}
.about-box li { display: flex; gap: 8px; padding: 6px 0; }
.about-box li::before { content: "·"; color: var(--blue); font-weight: 700; }
@media (max-width: 720px) { .about-flex { grid-template-columns: 1fr; } }

/* ---------- 产品中心页 ---------- */
.cats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.cat-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 24px; display: flex; gap: 18px; align-items: flex-start;
}
.cat-card .ico {
  flex: 0 0 52px; width: 52px; height: 52px; border-radius: 12px;
  background: var(--blue-light); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
}
.cat-card h3 { font-size: 17px; margin-bottom: 6px; }
.cat-card p { font-size: 14px; color: var(--muted); }
.cat-card .tags { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; }
.cat-card .tags span {
  font-size: 12.5px; background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 999px; padding: 2px 10px; color: var(--muted);
}
@media (max-width: 720px) { .cats { grid-template-columns: 1fr; } }

.notice {
  margin-top: 28px; background: #fff8ec; border: 1px solid #f0dfbe;
  border-radius: 10px; padding: 16px 18px; font-size: 14px; color: #7a5b16;
}

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 26px;
}
.contact-card .ico {
  width: 46px; height: 46px; border-radius: 12px; margin-bottom: 14px;
  background: var(--blue-light); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
}
.contact-card h3 { font-size: 16px; margin-bottom: 6px; color: var(--muted); font-weight: 500; }
.contact-card .val { font-size: 18px; font-weight: 600; word-break: break-all; }
.contact-card .tip { margin-top: 6px; font-size: 13px; color: var(--muted); }
@media (max-width: 720px) { .contact-grid { grid-template-columns: 1fr; } }

/* ---------- 页脚 ---------- */
.site-footer { background: #16212e; color: #9aa7b5; padding: 36px 0 28px; margin-top: 20px; }
.site-footer .f-grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 10px; }
.site-footer li { font-size: 13.5px; padding: 2px 0; }
.site-footer a:hover { color: #fff; }
.copyright {
  margin-top: 26px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12);
  font-size: 12.5px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap;
}
.copyright a { color: #9aa7b5; }
.copyright a:hover { color: #fff; }

/* 待填占位标记 */
.todo { color: #b45309; background: #fef3c7; border-radius: 4px; padding: 0 4px; }

/* ---------- 子页页头 ---------- */
.page-head {
  background: var(--blue-dark) linear-gradient(135deg, #0f3d73 0%, #17549c 60%, #2b6cb5 100%);
  color: #fff; padding: 44px 0;
}
.page-head h1 { font-size: 26px; }
.page-head p { margin-top: 8px; font-size: 15px; opacity: .85; }

/* ---------- 配套应用 ---------- */
.how-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 26px; }
.how-card { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 22px 24px; }
.how-card h3 { font-size: 16px; color: var(--blue-dark); margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.how-card .step {
  flex: 0 0 24px; width: 24px; height: 24px; border-radius: 50%;
  background: var(--blue); color: #fff; font-size: 13px;
  display: inline-flex; align-items: center; justify-content: center;
}
.how-card p { font-size: 14.5px; color: var(--muted); }
.app-figure { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.app-figure img { width: 100%; height: auto; }
.app-figure figcaption { text-align: center; font-size: 13px; color: var(--muted); margin-top: 8px; }
@media (max-width: 720px) { .how-grid { grid-template-columns: 1fr; } }

/* 兼容品牌标签 */
.brand-tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 22px; }
.brand-tags span {
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 16px; font-size: 14px; color: var(--muted);
}

/* 规格条（子页复用） */
.spec-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 30px; }
.spec-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 16px; text-align: center; }
.spec-item .k { font-size: 13px; color: var(--muted); }
.spec-item .v { font-size: 16px; font-weight: 600; color: var(--blue-dark); margin-top: 4px; }
@media (max-width: 720px) { .spec-strip { grid-template-columns: 1fr 1fr; } }

/* ---------- 资料下载 ---------- */
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.dl-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 24px; display: flex; flex-direction: column; gap: 10px;
}
.dl-card .ico {
  width: 46px; height: 46px; border-radius: 12px; margin-bottom: 4px;
  background: var(--blue-light); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
}
.dl-card h3 { font-size: 17px; }
.dl-card p { font-size: 14px; color: var(--muted); flex: 1; }
.dl-card .meta { font-size: 13px; color: var(--muted); }
.dl-card .btn { align-self: flex-start; background: var(--blue); color: #fff; padding: 10px 22px; font-size: 15px; }
.dl-note {
  margin-top: 22px; text-align: center; font-size: 13.5px; color: var(--muted);
  background: #fff8ec; border: 1px solid #f0dfbe; border-radius: 10px; padding: 14px 18px;
}
@media (max-width: 720px) { .dl-grid { grid-template-columns: 1fr; } }

/* ---------- 应用行业 ---------- */
.ind-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.ind-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; display: flex; gap: 14px; align-items: flex-start;
}
.ind-card .ico {
  flex: 0 0 44px; width: 44px; height: 44px; border-radius: 11px;
  background: var(--blue-light); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
}
.ind-card h3 { font-size: 16px; margin-bottom: 4px; }
.ind-card p { font-size: 13.5px; color: var(--muted); }
@media (max-width: 720px) { .ind-grid { grid-template-columns: 1fr; } }

/* ---------- 底部 CTA 条 ---------- */
.cta-bar {
  background: var(--blue-dark) linear-gradient(135deg, #0f3d73 0%, #17549c 60%, #2b6cb5 100%);
  color: #fff; padding: 48px 0;
}
.cta-bar .wrap { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.cta-bar h2 { font-size: 24px; }
.cta-bar p { margin-top: 6px; opacity: .88; font-size: 15px; }
.cta-bar .btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 产品页分类锚点 ---------- */
.anchor-nav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 28px; }
.anchor-nav a {
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 18px; font-size: 14.5px; color: var(--muted);
}
.anchor-nav a:hover { border-color: var(--blue); color: var(--blue); }
.anchor-nav a.on { background: var(--blue); border-color: var(--blue); color: #fff; }
.group-title {
  font-size: 18px; color: var(--blue-dark); font-weight: 600;
  padding: 10px 0 14px; border-bottom: 1px solid var(--line); margin: 26px 0 18px;
}
.group-title:first-child { margin-top: 0; }

/* ---------- 侧边悬浮联系条 ---------- */
.float-contact { position: fixed; right: 14px; bottom: 90px; z-index: 60; display: flex; flex-direction: column; gap: 8px; }
.float-contact a {
  width: 46px; height: 46px; border-radius: 10px; background: #fff;
  border: 1px solid var(--line); box-shadow: 0 2px 8px rgba(15,61,115,.10);
  display: flex; align-items: center; justify-content: center; color: var(--blue);
  position: relative;
}
.float-contact a:hover { background: var(--blue); color: #fff; }
.float-contact a .tip {
  position: absolute; right: 54px; top: 50%; transform: translateY(-50%);
  background: var(--ink); color: #fff; font-size: 12.5px; padding: 5px 10px;
  border-radius: 6px; white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity .15s;
}
.float-contact a:hover .tip { opacity: 1; }

/* 移动端底部条 */
.mobile-bar {
  display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  background: #fff; border-top: 1px solid var(--line);
}
.mobile-bar a {
  flex: 1; padding: 11px 0; text-align: center; font-size: 14px;
  display: flex; flex-direction: column; align-items: center; gap: 2px; color: var(--muted);
}
.mobile-bar a.call { background: var(--blue); color: #fff; }
@media (max-width: 720px) {
  .float-contact { display: none; }
  .mobile-bar { display: flex; }
  body { padding-bottom: 58px; }
}

/* ---------- 适配品牌图墙 ---------- */
.brand-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.brand-wall figure {
  margin: 0; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; overflow: hidden;
}
.brand-wall img { width: 100%; height: 150px; object-fit: cover; }
.brand-wall figcaption {
  font-size: 13.5px; text-align: center; padding: 9px 6px; color: var(--ink);
}
@media (max-width: 900px) { .brand-wall { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 720px) { .brand-wall { grid-template-columns: repeat(2, 1fr); } .brand-wall img { height: 120px; } }

/* ---------- 中英对照辅助 ---------- */
.en-sm {
  display: block; font-size: 12px; line-height: 1.4; letter-spacing: .4px;
  color: var(--muted); font-weight: 400; margin-top: 3px;
}
.en-block {
  margin-top: 18px; padding: 16px 18px; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; font-size: 14px; line-height: 1.8; color: var(--muted);
}
.en-block .t {
  font-size: 11.5px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--blue); font-weight: 700; margin-bottom: 6px;
}
.hero p.sub-en { margin-top: 4px; font-size: 13.5px; opacity: .72; letter-spacing: .3px; }

/* ---------- 型号谱系（产品大纲树） ---------- */
.tree-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.tree-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px;
}
.tree-card h3 { font-size: 16.5px; color: var(--ink); }
.tree-card .fit {
  display: inline-block; margin-top: 6px; font-size: 12px; color: var(--blue);
  background: var(--blue-light); border-radius: 999px; padding: 2px 10px;
}
.tree-card .lead { font-size: 13.5px; color: var(--muted); margin-top: 8px; }
.tree-sub { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 8px; }
.tree-sub .chip {
  display: inline-flex; align-items: baseline; gap: 6px;
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: 8px;
  padding: 5px 10px; font-size: 13.5px; color: var(--ink);
}
.tree-sub .chip b { color: var(--blue); font-weight: 700; }
.tree-sub .chip i { font-style: normal; font-size: 11.5px; color: var(--muted); }
.tree-sub .chip.wide { flex: 1 1 100%; justify-content: flex-start; }
@media (max-width: 720px) { .tree-grid { grid-template-columns: 1fr; } }

/* 通用选项：控制方式 / 表面处理 */
.opt-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 18px; }
.opt-box { background: var(--blue-light); border: 1px solid #cfe0f2; border-radius: 12px; padding: 18px 20px; }
.opt-box h4 { font-size: 15px; color: var(--blue-dark); }
.opt-box .row { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px; }
.opt-box .row span {
  background: #fff; border: 1px solid #cfe0f2; border-radius: 999px;
  padding: 4px 14px; font-size: 13.5px; color: var(--ink);
}
.opt-box .row span i { font-style: normal; font-size: 11.5px; color: var(--muted); margin-left: 4px; }
.opt-box .note { margin-top: 10px; font-size: 13px; color: var(--muted); }
@media (max-width: 720px) { .opt-strip { grid-template-columns: 1fr; } }

/* 产品页子系列小标题 */
.sub-title {
  font-size: 16px; color: var(--blue); font-weight: 600;
  margin: 28px 0 14px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
}
.sub-title .en-sm { display: inline-block; margin-top: 0; }
/* 顶栏 60px，锚点跳转时留出空间 */
.group-title, .sub-title { scroll-margin-top: 78px; }
section[id] { scroll-margin-top: 72px; }
/* 导航条过长时（板块多）压缩间距并允许内部滚动 */
.side-nav { max-height: calc(100vh - 150px); overflow: auto; }
.side-nav::-webkit-scrollbar { width: 0; height: 0; }
@media (min-width: 1301px) { .side-nav { gap: 13px; } }

/* ---------- 左侧章节跳转条（首页） ---------- */
.side-nav {
  position: fixed; left: 18px; top: 50%; transform: translateY(-50%);
  z-index: 55; display: flex; flex-direction: column; gap: 16px;
}
.side-nav .side-item {
  display: flex; align-items: center; gap: 9px;
  font-size: 13px; color: var(--muted); cursor: pointer;
}
.side-nav .side-item .dot {
  flex: 0 0 8px; width: 8px; height: 8px; border-radius: 50%;
  background: #c8d4e1; transition: background .18s, box-shadow .18s, transform .18s;
}
.side-nav .side-item .txt {
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 4px 12px; white-space: nowrap; font-size: 12.5px;
  box-shadow: 0 2px 8px rgba(15,61,115,.08);
  opacity: 0; transform: translateX(-8px); transition: opacity .18s, transform .18s;
}
.side-nav:hover .side-item .txt { opacity: 1; transform: none; }
.side-nav .side-item:hover { color: var(--blue); }
.side-nav .side-item:hover .dot { background: #89a6c6; }
.side-nav .side-item.on { color: var(--blue); font-weight: 600; }
.side-nav .side-item.on .dot {
  background: var(--blue); transform: scale(1.25);
  box-shadow: 0 0 0 4px rgba(23,84,156,.15);
}
.side-nav .side-item.on .txt { opacity: 1; transform: none; border-color: #cfe0f2; }
/* 二级条目（产品页子系列） */
.side-nav .side-item.sub { padding-left: 9px; }
.side-nav .side-item.sub .dot { flex-basis: 6px; width: 6px; height: 6px; background: #d8e1eb; }
.side-nav .side-item.sub .txt { font-size: 12px; padding: 3px 10px; }
.side-nav .side-item.sub.on .dot { background: var(--blue); }
/* 屏幕不够宽时收起，避免压住正文（正文 max-width 1080，需两侧各留 ~120px） */
@media (max-width: 1300px) { .side-nav { display: none; } }

/* =========================================================
   视觉升级：文字设计 + 动效（motion.js 负责开启进场动画）
   ========================================================= */

/* 数字统一等宽，避免计数跳动 */
.adv .num, .cnt { font-variant-numeric: tabular-nums; }

/* ---------- 1. 滚动进场 ---------- */
.motion-on .reveal { opacity: 0; transform: translateY(22px); }
.motion-on .reveal.in {
  opacity: 1; transform: none;
  transition: opacity .75s var(--ease), transform .75s var(--ease);
  transition-delay: var(--d, 0ms);
}
@media (prefers-reduced-motion: reduce) {
  .motion-on .reveal { opacity: 1; transform: none; }
  * { animation: none !important; transition: none !important; }
}

/* ---------- 2. 顶栏：滚动后浮起 ---------- */
.site-header { transition: box-shadow .3s, background .3s; }
.site-header.scrolled { box-shadow: 0 4px 20px rgba(15,61,115,.10); }

/* ---------- 3. 首屏横幅 ---------- */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; left: -10%; right: -10%; top: -25%; height: 150%;
  background:
    radial-gradient(40% 44% at 20% 16%, rgba(96,165,250,.38), transparent 62%),
    radial-gradient(36% 40% at 84% 74%, rgba(56,189,248,.30), transparent 64%);
  animation: heroFloat 20s ease-in-out infinite alternate;
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .14;
  background-image:
    linear-gradient(rgba(255,255,255,.7) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.7) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(72% 72% at 50% 40%, #000 35%, transparent 100%);
          mask-image: radial-gradient(72% 72% at 50% 40%, #000 35%, transparent 100%);
}
@keyframes heroFloat {
  from { transform: translate3d(0,0,0) scale(1); }
  to   { transform: translate3d(3%, -4%, 0) scale(1.10); }
}
.hero .wrap { position: relative; z-index: 2; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 9px; margin-bottom: 18px;
  font-size: 12px; letter-spacing: 3px; text-transform: uppercase;
  color: rgba(255,255,255,.78); border: 1px solid rgba(255,255,255,.30);
  border-radius: 999px; padding: 5px 15px; backdrop-filter: blur(2px);
}
.hero .eyebrow .pulse {
  width: 7px; height: 7px; border-radius: 50%; background: #7dd3fc;
  animation: dotPulse 2.2s infinite;
}
@keyframes dotPulse {
  0%   { box-shadow: 0 0 0 0 rgba(125,211,252,.75); }
  70%  { box-shadow: 0 0 0 11px rgba(125,211,252,0); }
  100% { box-shadow: 0 0 0 0 rgba(125,211,252,0); }
}
.hero h1 .grad {
  background: linear-gradient(94deg, #ffffff 8%, #a8d0ff 52%, #58a6f0 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .btns .btn { transition: transform .2s var(--ease), box-shadow .2s, background .2s; }
.hero .btns .btn-light { box-shadow: 0 12px 26px rgba(0,0,0,.20); }
.hero .btns .btn:hover { transform: translateY(-2px); }
.hero-grid > div:last-child img {
  border-radius: 16px;
  box-shadow: 0 26px 54px rgba(0,0,0,.30);
  animation: heroImg 7.5s ease-in-out infinite alternate;
}
@keyframes heroImg { from { transform: translateY(0); } to { transform: translateY(-11px); } }
@media (min-width: 721px) {
  .hero h1 { font-size: 40px; letter-spacing: -.6px; line-height: 1.28; }
  .hero p.sub { font-size: 19.5px; }
}

/* ---------- 4. 章节标题 ---------- */
.section-head .en { letter-spacing: 3.5px; font-size: 12px; }
.section-head .bar {
  width: 58px; height: 4px; border-radius: 99px;
  background: linear-gradient(90deg, var(--blue), #5aa3ee);
  transform: scaleX(.35); transform-origin: center;
  transition: transform .9s var(--ease);
}
.section-head.in .bar { transform: scaleX(1); }
@media (min-width: 721px) {
  .section-head h2 { font-size: 30px; letter-spacing: -.5px; }
}

/* ---------- 5. 文字设计：荧光笔关键词 ---------- */
.hl {
  background: linear-gradient(180deg, transparent 56%, rgba(23,84,156,.16) 56%, rgba(23,84,156,.08) 100%);
  padding: 0 3px; border-radius: 2px;
}
.hl-y {
  background: linear-gradient(180deg, transparent 56%, rgba(245,158,11,.24) 56%);
  padding: 0 3px; border-radius: 2px;
}
.lead-lg { font-size: 17px; line-height: 1.9; color: var(--muted); }
.en-block { border-left: 3px solid var(--blue); transition: background .3s, box-shadow .3s; }
.en-block:hover { background: #fbfdff; box-shadow: var(--shadow-1); }

/* ---------- 6. 卡片统一质感与 hover ---------- */
.biz-card, .prod-card, .cat-card, .ind-card, .how-card, .dl-card, .contact-card, .tree-card, .opt-box, .spec-item {
  transition: box-shadow .3s var(--ease), transform .3s var(--ease), border-color .3s;
}
.biz-card:hover, .cat-card:hover, .ind-card:hover, .how-card:hover, .dl-card:hover,
.tree-card:hover, .opt-box:hover, .spec-item:hover {
  box-shadow: var(--shadow-2); transform: translateY(-4px); border-color: #cfe0f2;
}
.biz-card .ico, .ind-card .ico, .cat-card .ico, .how-card .step { transition: transform .4s cubic-bezier(.34,1.56,.64,1), background .3s, color .3s; }
.biz-card:hover .ico, .ind-card:hover .ico, .cat-card:hover .ico {
  transform: translateY(-2px) scale(1.08) rotate(-5deg);
  background: var(--blue); color: #fff;
}
.biz-card:hover .ico img, .cat-card:hover .ico img { opacity: .92; }

/* 系列谱系卡片：左侧渐变小条 */
.tree-card { position: relative; overflow: hidden; }
.tree-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--blue), #7db6f0);
  transform: scaleY(0); transform-origin: top; transition: transform .45s var(--ease);
}
.tree-card:hover::before, .tree-card.in::before { transform: scaleY(1); }

/* 产品实拍 / 品牌墙：图片微放大 */
.prod-card .thumb img, .brand-wall img { transition: transform .55s var(--ease); }
.prod-card:hover .thumb img, .brand-wall figure:hover img { transform: scale(1.06); }
.brand-wall figure { transition: transform .3s var(--ease), box-shadow .3s; }
.brand-wall figure:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }

/* ---------- 7. 数字条 ---------- */
@media (min-width: 721px) { .adv .num { font-size: 38px; } }
.adv .num {
  background: linear-gradient(94deg, #17549c 10%, #3f8ee0 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  letter-spacing: -1px;
}
.adv .num small, .adv .num .cnt { -webkit-text-fill-color: initial; }
.adv .num small { color: var(--blue); font-size: 16px; }
.adv:hover .num { filter: brightness(1.08); }

/* ---------- 8. 底部 CTA：流动渐变 ---------- */
.cta-bar {
  position: relative;
  background-image: linear-gradient(120deg, #0f3d73 0%, #17549c 32%, #2f74bd 55%, #0f3d73 100%);
  background-size: 220% 220%;
  animation: ctaShift 16s ease infinite;
}
@keyframes ctaShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ---------- 9. 按钮箭头 ---------- */
.btn-arrow { display: inline-block; transition: transform .28s var(--ease); }
.btn:hover .btn-arrow, .more-line a:hover .btn-arrow { transform: translateX(5px); }

/* ---------- 10. 页脚 ---------- */
.site-footer { background: linear-gradient(180deg, #16212e 0%, #101a25 100%); }

/* ---------- 11. 侧边导航：hover 光晕 ---------- */
.side-nav .side-item:hover .dot { box-shadow: 0 0 0 5px rgba(23,84,156,.12); }

/* ---------- 12. 移动端适配（412px 华为 Mate 50 视口验证过） ---------- */
@media (max-width: 720px) {
  /* 徽章字号收紧，避免超出一行 */
  .hero .eyebrow { font-size: 10.5px; letter-spacing: 1.5px; padding: 4px 12px; gap: 7px; }
  /* 地图 SVG 直接缩放会看不清地名 → 改为横向滑动 */
  .map-figure { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 6px; }
  .map-figure img { min-width: 640px; }
  .map-hint { display: block; }
}
.map-hint { display: none; font-size: 12px; color: var(--muted); text-align: center; margin-top: 6px; }

/* =========================================================
   视觉升级 2.0：全站背景 + 立体感 + CTA 小卡片 + 数字条卡片化
   ========================================================= */

/* 全站底色：不再是大片死白 */
body { background: #f2f5f9; }

/* section 背景：白区带极淡点阵；soft 区带浅蓝渐变 + 点阵 */
.section {
  background-color: rgba(255,255,255,.82); /* 半透明白：底层 bg-texture 隐约透出 */
  background-image: radial-gradient(rgba(23,84,156,.05) 1px, transparent 1.4px);
  background-size: 26px 26px;
}
.section.soft {
  background-color: transparent;
  background-image:
    radial-gradient(rgba(23,84,156,.07) 1px, transparent 1.4px),
    linear-gradient(180deg, rgba(233,240,248,.86) 0%, rgba(243,248,253,.86) 100%); /* 半透明蓝：纹理隐约透出 */
  background-size: 24px 24px, 100% 100%;
}

/* 卡片立体感：默认微阴影 + 顶部高光 */
.biz-card, .prod-card, .cat-card, .ind-card, .how-card, .dl-card,
.contact-card, .tree-card, .opt-box, .spec-item, .app-figure, .about-box, .en-block {
  box-shadow: var(--shadow-1), inset 0 1px 0 rgba(255,255,255,.85);
}

/* ---------- CTA 小卡片（首页 hero 下 / 产品页检索条下） ---------- */
.cta-card-wrap { padding: 46px 0 10px; }
.cta-card {
  max-width: 900px; margin: 0 auto;
  background-image: linear-gradient(120deg, #0f3d73 0%, #17549c 32%, #2f74bd 55%, #0f3d73 100%);
  background-size: 220% 220%;
  animation: ctaShift 16s ease infinite;
  color: #fff; border-radius: 18px; padding: 30px 38px;
  display: flex; justify-content: space-between; align-items: center; gap: 22px; flex-wrap: wrap;
  box-shadow: 0 18px 42px rgba(15,61,115,.28), inset 0 1px 0 rgba(255,255,255,.18);
}
.cta-card h2 { font-size: 22px; letter-spacing: -.3px; }
.cta-card p { margin-top: 6px; opacity: .88; font-size: 14.5px; }
.cta-card > div:first-child { flex: 1 1 300px; min-width: 240px; }
.cta-card .btns { display: flex; gap: 12px; flex-wrap: wrap; flex-shrink: 0; }
.cta-card .btn-ghost { border-color: rgba(255,255,255,.55); }
.cta-card .btn:hover { transform: translateY(-2px); }
@media (max-width: 720px) {
  .cta-card-wrap { padding: 32px 0 4px; }
  .cta-card { padding: 24px 22px; }
}

/* ---------- 数字条：卡片化 ---------- */
.adv {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 22px 14px 18px; position: relative; overflow: hidden;
  box-shadow: var(--shadow-1), inset 0 1px 0 rgba(255,255,255,.9);
  transition: box-shadow .3s var(--ease), transform .3s var(--ease), border-color .3s;
}
.adv::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--blue), #5aa3ee);
}
.adv:hover { box-shadow: var(--shadow-2); transform: translateY(-4px); border-color: #cfe0f2; }
.adv-ico {
  width: 40px; height: 40px; border-radius: 11px; margin: 0 auto 12px;
  background: var(--blue-light); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  transition: transform .4s cubic-bezier(.34,1.56,.64,1), background .3s, color .3s;
}
.adv:hover .adv-ico { transform: translateY(-2px) scale(1.08); background: var(--blue); color: #fff; }
.adv .adv-en { display: block; margin-top: 2px; font-size: 11px; letter-spacing: 1px; text-transform: uppercase; color: #8c99a8; }

/* ---------- 全站背景纹理（AI 生成，低透明固定层） ---------- */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: url("assets/bg-texture.jpg") no-repeat center top / cover;
  opacity: .5;
}

/* ---------- 章节标题层叠在背景纹理固定层之上 ---------- */
.section-head { position: relative; z-index: 1; }

/* ---------- 标准地图 + 节点覆盖层 ---------- */
.stdmap { position: relative; min-width: 640px; }
.stdmap img { display: block; width: 100%; height: auto; border-radius: 10px; }
.stdmap-lines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.stdmap-lines .main { stroke: rgba(23,84,156,.38); stroke-width: 1.6; vector-effect: non-scaling-stroke; }
.stdmap-lines .flow {
  stroke: #2f74bd; stroke-width: 1.6; vector-effect: non-scaling-stroke;
  stroke-dasharray: 8 14; animation: dashFlow 2.6s linear infinite;
}
@keyframes dashFlow { to { stroke-dashoffset: -22; } }
.stdmap .nd {
  position: absolute; transform: translate(-50%,-50%);
  display: flex; align-items: center; gap: 4px; pointer-events: none;
}
.stdmap .nd i {
  width: 9px; height: 9px; border-radius: 50%; background: var(--blue); display: block;
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px rgba(23,84,156,.35);
}
.stdmap .nd em {
  font-style: normal; font-size: 12px; font-weight: 600; color: var(--blue-dark);
  background: rgba(255,255,255,.88); padding: 1px 6px; border-radius: 6px; white-space: nowrap;
  box-shadow: 0 1px 4px rgba(15,45,84,.18);
}
.stdmap .nd.hub i {
  width: 12px; height: 12px; background: #e0752a;
  box-shadow: 0 0 0 2px #fff, 0 0 0 5px rgba(224,117,42,.35);
}
.stdmap .nd.hub em { background: #e0752a; color: #fff; }
.stdmap .rp {
  position: absolute; left: 50%; top: 50%; width: 12px; height: 12px; margin: -6px 0 0 -6px;
  border-radius: 50%; border: 2px solid rgba(224,117,42,.75); animation: stdRipple 2.4s ease-out infinite;
}
.stdmap .rp2 { animation-delay: 1.2s; }
@keyframes stdRipple { 0% { opacity: .8; transform: scale(1); } 100% { opacity: 0; transform: scale(3.2); } }
@media (prefers-reduced-motion: reduce) {
  .stdmap-lines .flow, .stdmap .rp { animation: none; }
}

/* ---------- 服务网络：工程图纸工业风 ---------- */
.industrial .draw-card {
  position: relative; padding: 12px 12px 10px; border-radius: 12px;
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(47,116,189,.20), transparent 55%),
    linear-gradient(160deg, #182430 0%, #21334a 55%, #182430 100%);
  border: 1px solid #2e4256;
  box-shadow: var(--shadow-2), inset 0 1px 0 rgba(255,255,255,.07);
}
/* 顶部危险条纹 */
.industrial .hz {
  height: 5px; border-radius: 3px; margin-bottom: 8px;
  background: repeating-linear-gradient(-55deg, #e0752a 0 9px, #1b2836 9px 18px);
  opacity: .9;
}
/* 图纸编号栏 */
.industrial .draw-head, .industrial .draw-foot {
  display: flex; justify-content: space-between; gap: 10px;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 10.5px; letter-spacing: 1.2px; color: #8fb4d9;
  padding: 2px 4px; text-transform: uppercase; white-space: nowrap; overflow: hidden;
}
.industrial .draw-head { padding-bottom: 8px; }
.industrial .draw-foot {
  padding-top: 8px; border-top: 1px dashed rgba(143,180,217,.28); margin-top: 8px;
  color: #6d93b8;
}
/* 图纸四角标记（工程图角标） */
.industrial .stdmap { position: relative; min-width: 640px; margin: 0 2px; }
.industrial .stdmap::before, .industrial .stdmap::after {
  content: ""; position: absolute; width: 14px; height: 14px; pointer-events: none; z-index: 2;
  border-color: rgba(224,117,42,.65); border-style: solid;
}
.industrial .stdmap::before { top: 4px; left: 4px; border-width: 2px 0 0 2px; }
.industrial .stdmap::after  { bottom: 4px; right: 4px; border-width: 0 2px 2px 0; }
.industrial .stdmap img { border-radius: 6px; outline: 1px solid rgba(23,84,156,.25); }
/* 琥珀色流动线（工业警示色） */
.industrial .stdmap-lines .main { stroke: rgba(224,117,42,.30); }
.industrial .stdmap-lines .flow { stroke: #e0752a; filter: drop-shadow(0 0 2px rgba(224,117,42,.55)); }
/* 机械风节点 */
.industrial .stdmap .nd i {
  width: 10px; height: 10px; border-radius: 2px; background: #2f74bd; transform: rotate(45deg);
  box-shadow: 0 0 0 2px #fff, 0 0 0 3.5px rgba(23,84,156,.4);
}
.industrial .stdmap .nd em {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 11px; letter-spacing: .5px; color: #d7e6f5;
  background: rgba(24,36,48,.88); padding: 2px 7px; border-radius: 3px;
  border-left: 2px solid #e0752a; white-space: nowrap;
}
.industrial .stdmap .nd.hub i {
  width: 13px; height: 13px; border-radius: 3px; background: #e0752a; transform: rotate(45deg);
  box-shadow: 0 0 0 2px #fff, 0 0 0 4.5px rgba(224,117,42,.4);
}
.industrial .stdmap .nd.hub em { background: #e0752a; color: #fff; border-left-color: #fff; }
/* 图注：规格条样式 */
.industrial figcaption {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 11.5px; letter-spacing: .3px; color: #5b7286;
  background: #eef3f8; border: 1px solid #dbe5ee; border-radius: 8px;
  padding: 8px 14px; text-align: center;
}
.industrial figcaption .map-hint { font-size: 11px; }
@media (prefers-reduced-motion: reduce) {
  .industrial .stdmap-lines .flow { animation: none; }
}

/* 顶栏：公司全称较长，宽度自适应 */
.logo-name { font-size: 16px; line-height: 1.25; }
@media (min-width: 721px) { .logo-name { font-size: 16.5px; } }
@media (max-width: 720px) {
  .logo-name { font-size: 14px; white-space: normal; }
  .logo img, .logo-mark { flex-shrink: 0; }
}
@media (max-width: 400px) { .logo-name { font-size: 12.5px; } }

/* ---------- 产品目录：卡片式多级下钻 ---------- */
.catalog-sec { min-height: 520px; }
.crumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-size: 13px; color: var(--muted); margin-bottom: 18px;
}
.crumb a { color: var(--blue); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
.crumb .sep { opacity: .5; }
.crumb .cur { font-weight: 600; color: var(--ink); }

/* 分类 / 系列卡片 */
.pc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.pc-card {
  position: relative; display: flex; gap: 16px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 16px; text-decoration: none; color: inherit; overflow: hidden;
  box-shadow: var(--shadow-1), inset 0 1px 0 rgba(255,255,255,.85);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;
}
.pc-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--blue), #5aa3ee);
  opacity: 0; transition: opacity .25s;
}
.pc-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); border-color: rgba(23,84,156,.35); }
.pc-card:hover::before { opacity: 1; }
.pc-img {
  flex: 0 0 92px; width: 92px; height: 92px; border-radius: 10px; overflow: hidden;
  background: #f0f5fa; display: flex; align-items: center; justify-content: center;
}
.pc-img img { width: 100%; height: 100%; object-fit: cover; }
.pc-img svg { width: 40px; height: 40px; color: var(--blue); opacity: .55; }
.pc-card.big .pc-img { flex-basis: 132px; width: 132px; height: 118px; }
.pc-body { flex: 1; min-width: 0; }
.pc-body h2 { font-size: 20px; margin: 0 0 6px; }
.pc-body h3 { font-size: 16.5px; margin: 0 0 6px; }
.pc-body p { font-size: 13.5px; color: var(--muted); margin: 0 0 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pc-meta { font-size: 12px; color: var(--blue); font-weight: 600; letter-spacing: .3px; }
.pc-arrow {
  flex: 0 0 auto; font-size: 26px; line-height: 1; color: var(--blue); opacity: .35;
  transition: transform .25s var(--ease), opacity .25s;
}
.pc-card:hover .pc-arrow { transform: translateX(4px); opacity: 1; }
.en-sm { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: .8px; margin-top: 2px; }

.lvl-head { margin: 4px 0 20px; }
.lvl-head h2 { font-size: 24px; margin: 0 0 8px; }
.lvl-head p { color: var(--muted); font-size: 14.5px; margin: 0; }
.lvl-note { margin-top: 8px !important; font-size: 13.5px; color: var(--blue-dark); background: #e9f1fa; border: 1px solid #d3e3f3; border-radius: 8px; padding: 8px 14px; display: inline-block; }

/* 结构形式标签 */
.type-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
.type-chip {
  text-decoration: none; color: var(--ink); font-size: 13.5px; font-weight: 600;
  background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 7px 16px;
  box-shadow: 0 1px 3px rgba(15,45,84,.06); transition: all .2s;
}
.type-chip small { font-weight: 400; color: var(--muted); margin-left: 5px; font-size: 11.5px; }
.type-chip:hover, .type-chip.on { background: var(--blue); border-color: var(--blue); color: #fff; }
.type-chip:hover small, .type-chip.on small { color: rgba(255,255,255,.8); }

/* 型号卡片 */
.pm-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 16px; }
.pm-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  text-decoration: none; color: inherit; display: flex; flex-direction: column;
  box-shadow: var(--shadow-1), inset 0 1px 0 rgba(255,255,255,.85);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.pm-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }
.pm-img { margin: 0; height: 168px; background: #f4f8fc; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.pm-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s var(--ease); }
.pm-card:hover .pm-img img { transform: scale(1.05); }
.pm-img.ph { flex-direction: column; gap: 8px; color: #9fb4c9; }
.pm-img.ph svg { width: 42px; height: 42px; }
.pm-img.ph span { font-size: 12px; }
.pm-body { padding: 12px 14px 14px; }
.pm-body h3 { font-size: 15.5px; margin: 0 0 4px; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; letter-spacing: .2px; }
.pm-note { font-size: 12px; color: var(--muted); margin: 0 0 6px; }
.pm-go { font-size: 12.5px; color: var(--blue); font-weight: 600; }

/* 详情页 */
.pd { display: grid; grid-template-columns: minmax(280px, 460px) 1fr; gap: 28px; align-items: start; }
.pd-media { position: relative; }
.pd-media .pm-img { height: auto; aspect-ratio: 1 / 1; border-radius: 14px; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-1); }
.pd-badges { position: absolute; left: 12px; bottom: 12px; display: flex; gap: 8px; }
.bdg { background: var(--blue); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 999px; box-shadow: 0 2px 6px rgba(15,45,84,.25); }
.bdg.alt { background: #2f855a; }
.bdg.alt2 { background: rgba(24,36,48,.85); }
.pd-info h1 { font-size: 27px; margin: 0 0 4px; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; letter-spacing: .3px; }
.pd-sub { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
.pd-h3 { font-size: 15.5px; margin: 22px 0 10px; }
.pd-tip { font-size: 13px; color: var(--muted); background: #f2f7fc; border-left: 3px solid var(--blue); border-radius: 0 8px 8px 0; padding: 8px 12px; margin: 12px 0 0; }
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; font-size: 13.5px; }
.spec-table th, .spec-table td { padding: 9px 14px; border-bottom: 1px solid #edf2f7; text-align: left; vertical-align: top; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { width: 96px; color: var(--muted); font-weight: 600; background: #f8fafc; white-space: nowrap; }
.spec-table.mat { margin-top: 12px; }
.spec-table.mat th { width: 96px; }
.opt-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font-size: 12.5px; color: var(--blue-dark); background: #e9f1fa; border: 1px solid #d3e3f3; border-radius: 999px; padding: 5px 12px; }
.pd-btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

@media (max-width: 860px) {
  .pd { grid-template-columns: 1fr; gap: 18px; }
  .pc-card.big .pc-img { flex-basis: 96px; width: 96px; height: 96px; }
  .pc-body h2 { font-size: 17px; }
  .pm-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
  .pm-img { height: 130px; }
  .pm-body h3 { font-size: 14px; }
}
.btn-solid { background: var(--blue); color: #fff; font-weight: 600; }
.btn-solid:hover { background: var(--blue-dark); color: #fff; }
.pd-btns .btn-ghost { border-color: rgba(23,84,156,.45); color: var(--blue-dark); }
.pd-btns .btn-ghost:hover { background: #e9f1fa; color: var(--blue-dark); }

/* ================= 产品目录 · 工业科技风视觉层 v2 ================= */
.catalog-sec {
  background-color: transparent;
  background-image:
    radial-gradient(rgba(23,84,156,.07) 1px, transparent 1.3px),
    linear-gradient(180deg, #eaf1f8 0%, #f4f8fc 60%, #eef4fa 100%);
  background-size: 22px 22px, 100% 100%;
  position: relative;
}
.catalog-sec::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
  background: repeating-linear-gradient(90deg, var(--blue) 0 26px, #e0752a 26px 38px);
  opacity: .75;
}

/* 面包屑：机械铭牌 */
.crumb { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 12.5px; letter-spacing: .4px; }
.crumb a { color: var(--muted); border-bottom: 1px dashed rgba(23,84,156,.35); }
.crumb a:hover { color: var(--blue); text-decoration: none; border-bottom-color: var(--blue); }
.crumb .sep { color: #b3c4d6; }
.crumb .cur {
  background: linear-gradient(180deg, #fff, #eef4fa); border: 1px solid #cddbe8;
  border-left: 3px solid #e0752a; border-radius: 4px; padding: 3px 10px; color: var(--ink);
  box-shadow: 0 1px 3px rgba(15,45,84,.10);
}

/* 层级标题：工业栏 */
.lvl-head { border-left: 4px solid #e0752a; padding-left: 14px; }
.lvl-head h2 { font-size: 24px; margin: 0 0 6px; letter-spacing: .3px; }
.lvl-head h2::after {
  content: ""; display: block; width: 64px; height: 2px; margin-top: 8px;
  background: linear-gradient(90deg, var(--blue), rgba(23,84,156,0));
}
.lvl-note {
  background: linear-gradient(180deg, #eaf2fb, #e2ecf7) !important;
  border: 1px solid #cddbe8 !important; border-left: 3px solid var(--blue) !important;
  border-radius: 6px !important; font-size: 13.5px !important;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.85);
}

/* 结构形式标签：斜切工业按钮 */
.type-chip {
  position: relative; border-radius: 4px; letter-spacing: .5px;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 12.5px;
  background: linear-gradient(180deg, #fff, #f1f6fb); border: 1px solid #cddbe8;
  box-shadow: 0 1px 0 rgba(255,255,255,.9) inset, 0 2px 5px rgba(15,45,84,.07);
  padding: 8px 18px 8px 20px;
}
.type-chip::before {
  content: ""; position: absolute; left: 8px; top: 50%; margin-top: -3px;
  width: 6px; height: 6px; background: #c3d3e4; transform: rotate(45deg); transition: background .2s;
}
.type-chip small { font-family: inherit; font-size: 11px; opacity: .8; }
.type-chip:hover::before, .type-chip.on::before { background: #ffd9b0; }
.type-chip.on, .type-chip:hover {
  background: linear-gradient(180deg, #1c5da8, #123f77); border-color: #123f77; color: #fff;
  box-shadow: 0 3px 10px rgba(15,45,84,.28), inset 0 1px 0 rgba(255,255,255,.18);
}

/* 分类 / 系列卡片：图纸金属板 */
.pc-grid { counter-reset: pcc; }
.pc-card {
  position: relative; overflow: hidden; border-radius: 12px;
  border: 1px solid #cbdbea; padding: 16px 16px 16px 18px;
  background-color: #fff;
  background-image: linear-gradient(115deg, transparent 40%, rgba(47,116,189,.10) 50%, transparent 60%);
  background-size: 250% 100%; background-position: -70% 0;
  box-shadow: 0 2px 6px rgba(15,45,84,.07), 0 10px 24px -14px rgba(15,45,84,.22), inset 0 1px 0 #fff;
  transition: background-position .75s var(--ease), transform .25s var(--ease), box-shadow .25s, border-color .25s;
  counter-increment: pcc;
}
.pc-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; opacity: .9;
  background: linear-gradient(180deg, #2f74bd 0%, #17549c 55%, #e0752a 100%);
}
.pc-card::after {
  content: "CAT-" counter(pcc, decimal-leading-zero);
  position: absolute; top: 10px; right: 12px; z-index: 2;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 10px;
  letter-spacing: 1.2px; color: #8ea8c2; background: #f2f7fc;
  border: 1px solid #dbe6f0; border-radius: 3px; padding: 1px 6px;
}
.pc-card:hover {
  background-position: 170% 0; transform: translateY(-4px);
  border-color: rgba(23,84,156,.4);
  box-shadow: 0 6px 14px rgba(15,45,84,.12), 0 18px 34px -16px rgba(15,45,84,.35), inset 0 1px 0 #fff;
}
.pc-img {
  flex: 0 0 96px; width: 96px; height: 96px; border-radius: 8px;
  border: 1px solid #d8e4ef; background-color: #f4f8fc;
  background-image: radial-gradient(rgba(23,84,156,.12) 1px, transparent 1.2px);
  background-size: 14px 14px;
  box-shadow: inset 0 0 12px rgba(15,45,84,.06);
}
.pc-card.big .pc-img { flex-basis: 140px; width: 140px; height: 124px; }
.pc-card .pc-arrow { opacity: .28; color: var(--blue); font-size: 24px; }
.pc-meta { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 11.5px; letter-spacing: .6px; color: var(--blue); }
.pc-body h2, .pc-body h3 { letter-spacing: .3px; }
.en-sm { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; text-transform: uppercase; letter-spacing: 1.1px; font-size: 10.5px !important; }

/* 型号卡片：带序号铭牌 */
.pm-grid { counter-reset: pmc; }
.pm-card {
  position: relative; overflow: hidden; border-radius: 10px; border: 1px solid #cbdbea;
  background: #fff;
  box-shadow: 0 2px 6px rgba(15,45,84,.07), inset 0 1px 0 #fff;
  counter-increment: pmc;
  transition: transform .25s var(--ease), box-shadow .25s, border-color .25s;
}
.pm-card::before {
  content: ""; position: absolute; inset: 0; z-index: 3; pointer-events: none;
  background: linear-gradient(115deg, transparent 42%, rgba(255,255,255,.55) 50%, transparent 58%);
  background-size: 260% 100%; background-position: -80% 0; opacity: 0;
  transition: opacity .3s, background-position .8s var(--ease);
}
.pm-card:hover::before { opacity: 1; background-position: 180% 0; }
.pm-card::after {
  content: counter(pmc, decimal-leading-zero);
  position: absolute; top: 8px; left: 8px; z-index: 4;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 10px; letter-spacing: 1px;
  color: #fff; background: rgba(15,45,84,.62); border-radius: 3px; padding: 2px 6px;
  box-shadow: 0 1px 4px rgba(15,45,84,.3);
}
.pm-card:hover { transform: translateY(-5px); border-color: rgba(23,84,156,.42); box-shadow: 0 10px 22px -8px rgba(15,45,84,.35); }
.pm-img {
  height: 172px; position: relative; background-color: #f5f9fd;
  background-image:
    linear-gradient(180deg, rgba(255,255,255,.85), rgba(240,246,252,.6)),
    radial-gradient(rgba(23,84,156,.10) 1px, transparent 1.2px);
  background-size: 100% 100%, 16px 16px;
  border-bottom: 1px solid #dae5ef;
}
.pm-img::after {
  content: ""; position: absolute; right: 8px; bottom: 8px; width: 14px; height: 14px;
  border-right: 2px solid rgba(224,117,42,.55); border-bottom: 2px solid rgba(224,117,42,.55);
  opacity: 0; transition: opacity .25s;
}
.pm-card:hover .pm-img::after { opacity: 1; }
.pm-img.ph { color: #93a9c0; background-image: radial-gradient(rgba(23,84,156,.10) 1px, transparent 1.2px); }
.pm-body { padding: 11px 13px 13px; background: linear-gradient(180deg, #fff, #fafdff); }
.pm-body h3 { font-size: 15px; letter-spacing: .3px; }
.pm-go { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 11.5px; letter-spacing: .5px; }
.pm-body h3 + .pm-go { display: inline-block; margin-top: 2px; }

/* 详情页：图纸框 + 扫描线 */
.pd-media {
  padding: 14px; border: 1px solid #cbdbea; border-radius: 12px; position: relative;
  background-color: #f6f9fd;
  background-image: radial-gradient(rgba(23,84,156,.10) 1px, transparent 1.2px);
  background-size: 18px 18px;
  box-shadow: inset 0 1px 0 #fff, 0 4px 14px -8px rgba(15,45,84,.35);
}
.pd-media::before, .pd-media::after {
  content: ""; position: absolute; width: 16px; height: 16px; z-index: 2;
  border-color: rgba(23,84,156,.55); border-style: solid;
}
.pd-media::before { top: 6px; left: 6px; border-width: 2px 0 0 2px; }
.pd-media::after { bottom: 6px; right: 6px; border-width: 0 2px 2px 0; }
.pd-media .pm-img {
  aspect-ratio: 1 / 1; background: #fff; border: 1px solid #dfe8f1; border-radius: 8px;
  overflow: hidden; position: relative;
  box-shadow: inset 0 0 20px rgba(15,45,84,.06);
}
.pd-media .pm-img::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px; z-index: 2;
  background: linear-gradient(90deg, transparent, rgba(90,163,238,.75), transparent);
  animation: pdScan 5s ease-in-out infinite;
}
@keyframes pdScan { 0% { transform: translateY(0); opacity: 0; } 8% { opacity: 1; } 92% { opacity: 1; } 100% { transform: translateY(430px); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .pd-media .pm-img::before { animation: none; opacity: .55; top: 50%; } }
.pd-badges { left: 22px; bottom: 22px; }
.bdg {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 11px; letter-spacing: 1px;
  border-radius: 3px; padding: 4px 11px;
}
.bdg.alt2 { background: rgba(24,36,48,.9); }

/* 规格表：铭牌质感 */
.pd-info h1 {
  letter-spacing: .5px; position: relative; padding-bottom: 10px;
}
.pd-info h1::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--blue) 0%, rgba(23,84,156,.25) 45%, transparent 100%);
}
.pd-sub { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 12.5px; letter-spacing: .6px; color: #6d8aa6; }
.pd-h3 { font-size: 14.5px; letter-spacing: .5px; }
.pd-h3::before { content: "▎"; color: #e0752a; margin-right: 4px; }
.spec-table {
  border: 1px solid #cbdbea; border-radius: 8px; box-shadow: 0 2px 6px rgba(15,45,84,.06), inset 0 1px 0 #fff;
  font-size: 13.5px;
}
.spec-table tr:not(:last-child) th, .spec-table tr:not(:last-child) td { border-bottom: 1px dashed #e3ebf3; }
.spec-table th {
  background: linear-gradient(180deg, #f7fafd, #eef4fa); color: #5a7a99;
  color: #5a7a99; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 12px; letter-spacing: .4px; white-space: nowrap;
}
.spec-table td { color: #1f3550; }
.spec-table.mat th { background: linear-gradient(180deg, #f8fafd, #f0f5fa); }
.opt-chips .chip {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 12px; letter-spacing: .3px;
  border-radius: 4px; padding: 6px 12px; color: #1c477e;
  background: linear-gradient(180deg, #f3f8fd, #e7f0f9); border: 1px solid #cbdbea;
  box-shadow: inset 0 1px 0 #fff, 0 1px 3px rgba(15,45,84,.06);
}
.pd-btns .btn {
  border-radius: 4px; font-weight: 600; letter-spacing: .5px; padding: 11px 24px;
  box-shadow: 0 3px 10px -4px rgba(15,45,84,.5), inset 0 1px 0 rgba(255,255,255,.22);
}
.pd-btns .btn-solid { background: linear-gradient(180deg, #1f63b0, #14406f); }
.pd-btns .btn-solid:hover { background: linear-gradient(180deg, #17549c, #0f3459); }
.pd-btns .btn-ghost { background: linear-gradient(180deg, #fff, #f2f7fc); }

@media (max-width: 860px) {
  .pc-card .pc-arrow { display: none; }
  .pc-img { flex-basis: 78px; width: 78px; height: 78px; }
  .pc-card.big .pc-img { flex-basis: 92px; width: 92px; height: 88px; }
}

/* 目录 v2 微调 */
.pc-meta { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.pc-grid.home { max-width: 1060px; margin: 0 auto; }
.pc-grid.home .pc-card { padding: 22px; }
.pc-grid.home .pc-img { flex-basis: 150px; width: 150px; height: 130px; }
.pc-grid.home .pc-body h2 { font-size: 21px; }
.pc-grid.home .pc-body p { font-size: 14px; }
.pc-grid.home .pc-card.big .pc-img { flex-basis: 150px; width: 150px; height: 130px; }
@media (max-width: 720px) {
  .pc-card::after { display: none; }
  .crumb { font-size: 11.5px; gap: 6px; }
  .crumb .cur { padding: 2px 8px; }
  .catalog-sec::before { opacity: .5; }
}

/* ================= 结构与零件构成（CAD / 3D） ================= */
.cad {
  margin-top: 22px; border: 1px solid var(--line); border-radius: 12px;
  background: linear-gradient(180deg, #ffffff, #f7f9fc);
  overflow: hidden;
}
.cad-3d {
  position: relative; height: 300px; border-bottom: 1px solid var(--line);
  background: radial-gradient(120% 120% at 50% 0%, #eef3f9 0%, #e3eaf3 60%, #dbe4ee 100%);
}
.cad-3d canvas { display: block; width: 100%; height: 100%; cursor: grab; }
.cad-3d canvas:active { cursor: grabbing; }
.cad-3d-tip {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 12.5px; color: var(--muted); letter-spacing: .04em;
}
.cad-3d-tip.err { color: #b0452c; }

.cad-draw { padding: 16px 16px 10px; }
.cad-tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.cad-tab {
  font: inherit; font-size: 12.5px; letter-spacing: .02em; cursor: pointer;
  padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: #fff; color: var(--muted); transition: all .18s var(--ease);
}
.cad-tab:hover { border-color: var(--blue); color: var(--blue); }
.cad-tab.on { background: var(--blue); border-color: var(--blue); color: #fff; box-shadow: var(--shadow-1); }
.cad-stage {
  border: 1px solid var(--line); border-radius: 10px; background: #f4f6f8;
  padding: 10px; display: flex; align-items: center; justify-content: center; min-height: 220px;
}
.cad-stage img { max-width: 100%; max-height: 380px; display: block; }
.cad-cap { margin-top: 8px; font-size: 12px; color: var(--muted); text-align: center; }

.cad-parts { padding: 4px 16px 18px; }
.cad-parts h4 {
  font-size: 14px; letter-spacing: .04em; margin-bottom: 10px;
  display: flex; align-items: baseline; gap: 10px;
}
.cad-parts h4 span { font-size: 11.5px; font-weight: 400; color: var(--muted); letter-spacing: .02em; }
.part-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.part-chips li {
  font-size: 12.5px; padding: 5px 12px; border-radius: 8px;
  border: 1px dashed #c9d4e2; background: #fff; color: var(--ink);
  display: flex; align-items: center; gap: 8px;
}
.part-chips li.asm { border-style: solid; border-color: var(--blue); background: var(--blue-light); color: var(--blue-dark); }
.part-chips li i { font-style: normal; font-size: 10.5px; padding: 1px 6px; border-radius: 4px; background: var(--blue); color: #fff; }
.part-chips li em { font-style: normal; font-size: 10.5px; color: #8a97a6; letter-spacing: .02em; }
.cad-note {
  margin-top: 12px; font-size: 11.5px; line-height: 1.75; color: var(--muted);
  padding: 9px 12px; border-left: 3px solid var(--blue); background: #f0f5fb; border-radius: 0 6px 6px 0;
}
.pm-img.is-cad img { padding: 6px; background: #f4f6f8; }
@media (max-width: 640px) {
  .cad-3d { height: 240px; }
  .cad-stage { min-height: 180px; }
  .part-chips li { font-size: 12px; }
}
.cad-actions { margin-top: 12px; }
.cad-actions .btn { font-size: 13px; padding: 8px 16px; }
.cad-pending {
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  padding: 10px 16px; font-size: 12.5px; color: var(--muted);
  border-bottom: 1px solid var(--line); background: #fbfcfe;
}
.cad-pending .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--blue);
  box-shadow: 0 0 0 3px rgba(23,84,156,.14); flex: none;
}
.cad-pending a { color: var(--blue); text-decoration: none; }
.cad-pending a:hover { text-decoration: underline; }
.pd-dim { margin-top: 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; padding: 10px; }
.pd-dim img { display: block; width: 100%; border-radius: 6px; }
.pd-dim figcaption { margin-top: 6px; font-size: 11.5px; color: var(--muted); text-align: center; }

/* ---------- 微信二维码 ---------- */
.cta-qr {
  display: inline-flex; flex-direction: column; align-items: center; gap: 8px;
  background: #fff; border-radius: 14px; padding: 10px 10px 8px;
  text-decoration: none; flex-shrink: 0;
  box-shadow: 0 10px 24px rgba(4,22,44,.35);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.cta-qr:hover { transform: translateY(-3px); box-shadow: 0 16px 32px rgba(4,22,44,.42); }
.cta-qr img { display: block; width: 104px; height: 104px; border-radius: 8px; }
.cta-qr span { font-size: 12px; letter-spacing: .06em; color: var(--blue-dark); font-weight: 600; }
.wx-qr {
  display: block; width: 180px; height: 180px; margin-top: 12px;
  border: 1px solid var(--line); border-radius: 12px; padding: 8px; background: #fff;
  box-shadow: var(--shadow-1);
}
@media (max-width: 720px) {
  .cta-qr { align-self: center; }
  .cta-qr img { width: 96px; height: 96px; }
  .wx-qr { width: 160px; height: 160px; }
}

/* ---------- 详情页多图相册 ---------- */
.pd-thumbs {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 10px; margin-top: 14px;
}
.pd-thumb {
  padding: 0; border: 2px solid var(--line); border-radius: 10px;
  background: #fff; cursor: pointer; overflow: hidden; aspect-ratio: 1 / 1;
  transition: border-color .18s var(--ease), transform .18s var(--ease), box-shadow .18s var(--ease);
}
.pd-thumb img { display: block; width: 100%; height: 100%; object-fit: cover; }
.pd-thumb:hover { border-color: #9dbde0; transform: translateY(-2px); }
.pd-thumb.on { border-color: var(--blue); box-shadow: 0 4px 12px rgba(23,84,156,.18); }
.pd-badges.in-flow { position: static; margin-top: 10px; }

/* LOGO 当封面：按图标呈现，完整显示不裁切 */
.pc-img img.logo, .pm-img img.logo { object-fit: contain; background: #fff; }
.pc-img img.logo { padding: 8px; }
.pm-img img.logo { padding: 12px; }