@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/static/fonts/inter-400.woff2") format("woff2");
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/static/fonts/inter-500.woff2") format("woff2");
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/static/fonts/inter-600.woff2") format("woff2");
}
@font-face {
  font-family: "Inter Tight";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/static/fonts/inter-tight-600.woff2") format("woff2");
}
@font-face {
  font-family: "Inter Tight";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/static/fonts/inter-tight-700.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/static/fonts/plex-mono-400.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/static/fonts/plex-mono-500.woff2") format("woff2");
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/static/fonts/noto-sc-400.woff2") format("woff2");
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/static/fonts/noto-sc-500.woff2") format("woff2");
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/static/fonts/noto-sc-700.woff2") format("woff2");
}

:root {
  --bg: #f3f4f6;
  --paper: #fff;
  --ink: #111318;
  --muted: #5c6370;
  --line: #e4e6ea;
  --navy: #0b0f14;
  --navy-2: #161c24;
  --signal: #f0b429;
  --signal-ink: #16120a;
  --white: #fff;
  --wrap-max: 1520px;
  --wrap-pad: 36px;
  --fs: 18px;
  --fs-brand: 34px;
  --fs-brand-sub: 15px;
  --fs-nav: 20px;
  --header-h: 96px;
}
@media (min-width: 1366px) {
  :root {
    --wrap-max: 1600px;
    --wrap-pad: 48px;
    --fs: 18px;
    --fs-brand: 36px;
    --fs-nav: 22px;
    --header-h: 100px;
  }
}
@media (min-width: 1600px) {
  :root {
    --wrap-max: 1760px;
    --wrap-pad: 64px;
    --fs: 19px;
    --fs-brand: 40px;
    --fs-brand-sub: 16px;
    --fs-nav: 24px;
    --header-h: 108px;
  }
}
@media (min-width: 1920px) {
  :root {
    --wrap-max: 1880px;
    --wrap-pad: 80px;
    --fs: 20px;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body {
  font-family: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: var(--fs);
  font-weight: 400;
}
h1, h2, h3, .brand, .hero-title, .page-hero h1 {
  font-family: "Inter Tight", "Noto Sans SC", Inter, sans-serif;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(var(--wrap-max), calc(100% - var(--wrap-pad) * 2)); margin: 0 auto; }
.mono { font-family: "IBM Plex Mono", Inter, monospace; }

.site-header {
  background: rgba(255,255,255,.92);
  color: var(--ink);
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(1.2) blur(16px);
}
.site-header .wrap { position: relative; }
.header-inner, .nav, .lang {
  display: flex;
  align-items: center;
  gap: 28px;
}
.header-inner { justify-content: space-between; min-height: var(--header-h); }
.nav-toggle {
  display: none;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 6px 10px;
  font-size: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: .02em;
  font-size: var(--fs-brand);
  line-height: 1.05;
}
.mark {
  width: 20px;
  height: 20px;
  background: var(--signal);
  flex: 0 0 20px;
}
.brand small {
  display: block;
  font-family: Inter, "Noto Sans SC", sans-serif;
  font-weight: 500;
  letter-spacing: .06em;
  font-size: var(--fs-brand-sub);
  color: var(--muted);
  text-transform: uppercase;
  margin-top: 4px;
}
.nav a {
  color: #3a4150;
  font-size: var(--fs-nav);
  font-weight: 600;
  letter-spacing: .04em;
}
html[lang="en"] .nav a { text-transform: uppercase; }
.nav a.active, .nav a:hover { color: var(--ink); }
.nav a.active { box-shadow: inset 0 -2px 0 var(--signal); padding-bottom: 2px; }
.nav { align-self: stretch; }
.nav-item {
  position: static;
  align-self: stretch;
  display: flex;
  align-items: center;
}
.nav-item > a { display: flex; align-items: center; height: 100%; }
.mega {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: #0b0f14;
  color: #c5cad3;
  padding: 36px 0 40px;
  border-top: 1px solid #1c222c;
  box-shadow: 0 24px 48px rgba(0,0,0,.18);
  z-index: 40;
}
.mega::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -36px;
  height: 36px;
}
.nav-item:hover .mega,
.nav-item:focus-within .mega { display: block; }
.mega-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 28px;
}
.mega-col { display: grid; gap: 8px; align-content: start; }
.mega-h {
  color: #fff !important;
  font-family: "Inter Tight", "Noto Sans SC", sans-serif;
  font-size: 18px;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  text-transform: none !important;
}
.mega-col a {
  color: #9aa3b0;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  line-height: 1.45;
}
.mega-col a:hover { color: #fff; }
.catalog-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
}
.cat-side { border-right: 1px solid var(--line); padding-right: 22px; }
.cat-side a {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 0;
  color: var(--muted);
  font-size: 17px;
}
.cat-side a.fam { color: var(--ink); font-weight: 600; margin-top: 14px; }
.cat-side a.sub { padding-left: 12px; font-size: 16px; }
.cat-side a.on { color: var(--ink); box-shadow: inset 3px 0 0 var(--signal); padding-left: 10px; }
.cat-side a span {
  font-family: "IBM Plex Mono", Inter, monospace;
  font-size: 11px;
  color: #8b93a0;
}
.lang { gap: 10px; }
.lang a {
  border: 1px solid var(--line);
  padding: 7px 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--muted);
}
.lang a.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.header-cta {
  padding: 12px 18px !important;
  font-size: 16px !important;
  margin-left: 8px;
}

.hero {
  background:
    radial-gradient(circle at 78% 30%, rgba(240,180,41,.16), transparent 26%),
    linear-gradient(180deg, #f7f8fa 0%, #eef0f3 100%);
  color: var(--ink);
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}
.kicker {
  font-family: "IBM Plex Mono", Inter, monospace;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 18px;
}
.hero h1, .hero-title {
  font-size: clamp(44px, 5.4vw, 76px);
  max-width: 14ch;
  margin: 0 0 18px;
}
.hero p { max-width: 48ch; color: var(--muted); font-size: 1.15em; margin: 0; }
.actions { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 20px;
  border: 0;
  cursor: pointer;
  font: 600 16px/1 Inter, "Noto Sans SC", sans-serif;
  letter-spacing: .06em;
}
html[lang="en"] .btn { text-transform: uppercase; }
.btn-primary { background: var(--signal); color: var(--signal-ink); }
.btn-primary:hover { filter: brightness(.96); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid #c8ccd3; }
.btn-ghost:hover { border-color: var(--ink); }
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 48px;
  border-top: 1px solid #d8dbe1;
}
.stat { padding: 16px 16px 0 0; }
.stat b {
  display: block;
  font-family: "Inter Tight", "Noto Sans SC", sans-serif;
  font-size: 26px;
  letter-spacing: -0.03em;
  margin-top: 4px;
}
.stat span {
  font-family: "IBM Plex Mono", Inter, monospace;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-visual {
  position: relative;
  min-height: 420px;
  background:
    radial-gradient(circle at 50% 48%, #fff 0 28%, transparent 29%),
    repeating-linear-gradient(0deg, transparent 0 17px, rgba(17,19,24,.05) 17px 18px),
    repeating-linear-gradient(90deg, transparent 0 17px, rgba(17,19,24,.05) 17px 18px),
    #eceef1;
  border: 1px solid var(--line);
  overflow: hidden;
}
.hero-ghost {
  position: absolute;
  right: -4%;
  bottom: -12%;
  font-family: "Inter Tight", sans-serif;
  font-size: 220px;
  font-weight: 700;
  color: rgba(17,19,24,.06);
  letter-spacing: -.06em;
  line-height: .8;
  pointer-events: none;
}
.actuator {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 240px;
  height: 280px;
  transform: translate(-50%, -54%);
}
.act-body {
  position: absolute;
  left: 36px; top: 88px;
  width: 168px; height: 118px;
  background: linear-gradient(160deg, #3a4250 0%, #1a2029 55%, #0f1319 100%);
  box-shadow: 0 22px 48px rgba(11,15,20,.22);
  clip-path: polygon(8% 0, 92% 0, 100% 14%, 100% 100%, 0 100%, 0 14%);
}
.act-body:before {
  content: "";
  position: absolute;
  left: 16px; right: 16px; top: 22px;
  height: 54px;
  background: repeating-linear-gradient(90deg, transparent 0 8px, rgba(255,255,255,.07) 8px 10px);
}
.act-body:after {
  content: "";
  position: absolute;
  right: 18px; top: 40px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(240,180,41,.2);
}
.act-neck {
  position: absolute;
  left: 104px; top: 64px;
  width: 32px; height: 30px;
  background: linear-gradient(#4b5563, #2a313c);
}
.act-wheel {
  position: absolute;
  left: 82px; top: 10px;
  width: 76px; height: 76px;
  border: 8px solid #1b212b;
  border-radius: 50%;
  background:
    linear-gradient(#d9dde3, #d9dde3) center/10px 10px no-repeat,
    repeating-conic-gradient(#1b212b 0 12deg, #eef0f3 12deg 28deg);
  box-shadow: 0 8px 18px rgba(0,0,0,.12);
}
.act-flange {
  position: absolute;
  left: 58px; top: 204px;
  width: 124px; height: 16px;
  background: #2a313c;
  box-shadow: 0 10px 0 #111318;
}
.hero-chips {
  position: absolute;
  left: 20px;
  bottom: 20px;
  display: flex;
  gap: 8px;
}
.hero-chips span {
  font-family: "IBM Plex Mono", Inter, monospace;
  font-size: 13px;
  letter-spacing: .08em;
  background: #fff;
  border: 1px solid var(--line);
  padding: 6px 8px;
}

.section { padding: 96px 0; }
.section-head { margin-bottom: 36px; }
.section-head h2 { margin: 0 0 12px; font-size: clamp(32px, 4vw, 48px); }
.lead { color: var(--muted); margin: 0; max-width: 64ch; font-size: 1.05em; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card, .panel {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 22px;
}
.card { display: block; transition: transform .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-3px); border-color: #111318; }
.card h3 { margin: 0 0 8px; font-size: 24px; }
.meta { color: var(--muted); font-size: 16px; margin: 0; }
.card-spec {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: "IBM Plex Mono", Inter, monospace;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--ink);
}
.card-spec span { color: var(--muted); letter-spacing: .12em; text-transform: uppercase; margin-right: 8px; }
.more {
  display: inline-flex;
  margin-top: 14px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--ink);
}
html[lang="en"] .more { text-transform: uppercase; }
.more:after { content: " →"; color: #c9a227; }

.product-card { padding: 0; overflow: hidden; }
.product-card .card-body { padding: 20px 20px 22px; }
.thumb {
  position: relative;
  aspect-ratio: 1 / 1;
  height: auto;
  background: #f4f5f7;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
}
.thumb:has(img) .thumb-code { display: none; }
.thumb-code {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  font-family: "Inter Tight", sans-serif;
  font-size: 28px;
  line-height: 1.15;
  letter-spacing: -0.04em;
  color: var(--ink);
}
.thumb-cat {
  position: absolute;
  right: 14px; top: 14px;
  font-family: "IBM Plex Mono", Inter, monospace;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  background: #fff;
  border: 1px solid var(--line);
  padding: 4px 7px;
}

.sol-card { min-height: 220px; display: flex; flex-direction: column; justify-content: flex-end; }
.sol-no {
  font-family: "IBM Plex Mono", Inter, monospace;
  font-size: 14px;
  letter-spacing: .16em;
  color: var(--muted);
  margin-bottom: 18px;
}

.page-hero {
  background: var(--navy);
  color: #fff;
  padding: 56px 0 48px;
}
.page-hero .kicker { color: rgba(255,255,255,.5); }
.page-hero h1 { margin: 0; font-size: clamp(36px, 5vw, 60px); color: #fff; }
.page-hero .lead { color: rgba(255,255,255,.72); margin-top: 12px; }
.page-hero .crumb, .page-hero .crumb a { color: rgba(255,255,255,.78); }
.page-hero .btn-ghost { color: #fff; border-color: rgba(255,255,255,.45); }
.page-hero .actions { margin-top: 28px; }

.detail {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 36px;
  align-items: start;
}
.detail-visual { min-height: 0; }
.detail h1 { margin: 0 0 12px; font-size: clamp(32px, 4vw, 52px); }
.specs:empty { display: none; }
.specs { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 22px 0; background: var(--line); border: 1px solid var(--line); }
.spec { background: #fff; padding: 14px 16px; }
.spec:last-child:nth-child(odd) { grid-column: 1 / -1; }
.spec span {
  display: block;
  font-family: "IBM Plex Mono", Inter, monospace;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.spec b { font-family: "IBM Plex Mono", Inter, monospace; font-weight: 500; font-size: 16px; }
.panel-body { white-space: pre-wrap; color: #2b313c; }

form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin: 14px 0 6px;
  color: #3d4450;
}
html[lang="zh"] label { letter-spacing: .06em; }
input, textarea, select {
  width: 100%;
  padding: 12px 0;
  border: 0;
  border-bottom: 1px solid #cfd3da;
  border-radius: 0;
  font: inherit;
  background: transparent;
}
input:focus, textarea:focus, select:focus {
  outline: 0;
  border-bottom-color: var(--ink);
}
textarea { min-height: 110px; }
.flash { background: #e9f7ee; color: #146c36; padding: 12px 14px; margin-bottom: 12px; }
.flash-bad { background: #fde8e8; color: #9b1c1c; }
.quoting { margin: 18px 0 0; font-weight: 600; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--signal);
  color: var(--signal-ink);
  padding: 8px 12px;
  z-index: 50;
}
.skip:focus { top: 12px; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}
.spec a { color: inherit; border-bottom: 1px solid var(--line); }
.crumb { font-family: "IBM Plex Mono", Inter, monospace; font-size: 14px; letter-spacing: .06em; margin-bottom: 18px; }
.crumb a { color: var(--muted); }

.site-footer {
  background: var(--navy);
  color: #b7bec8;
  padding: 48px 0 28px;
  font-size: 16px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
}
.site-footer strong {
  display: block;
  color: #fff;
  font-family: "Inter Tight", "Noto Sans SC", sans-serif;
  font-size: 22px;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}
.site-footer a { color: #d5dae1; }
.site-footer a:hover { color: #fff; }
.foot-links { display: grid; gap: 8px; }
.foot-meta { margin-top: 28px; padding-top: 18px; border-top: 1px solid #222833; color: #7d8694; font-size: 14px; }

.admin-body { background: #eef1f4; }
.admin-nav {
  background: #0b0f14;
  color: #fff;
  min-height: 100vh;
  width: 220px;
  padding: 22px 16px;
  position: fixed;
}
.admin-nav a { display: block; color: #d5deea; padding: 8px 0; }
.admin-nav a:hover { color: #fff; }
.admin-main { margin-left: 220px; padding: 24px; }
.table { width: 100%; border-collapse: collapse; background: #fff; }
.table th, .table td { border-bottom: 1px solid #eee; padding: 10px; text-align: left; font-size: 14px; }
.dual { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.col-en { background: #f7f5f0; }
.col-zh { background: #eef5f1; }

@media (max-width: 1180px) {
  .header-cta { display: none !important; }
  .nav-toggle { display: inline-flex; font-size: 22px; }
  .nav-item { display: block; }
  .nav-item > a { height: auto; }
  .mega::before { display: none; }
  .mega {
    position: static;
    display: block;
    padding: 8px 0 4px 8px;
    background: transparent;
    color: inherit;
    box-shadow: none;
    border-top: 0;
  }
  .mega-h { color: var(--ink) !important; font-size: 16px; }
  .mega-col a { color: var(--muted); font-size: 15px; }
  .mega-col a:hover { color: var(--ink); }
  .mega-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .catalog-layout { grid-template-columns: 1fr; }
  .cat-side { border-right: 0; border-bottom: 1px solid var(--line); padding: 0 0 16px; }
  .nav {
    display: none;
    position: absolute;
    left: 0; right: 0; top: var(--header-h);
    background: #fff;
    flex-direction: column;
    padding: 12px 16px 20px;
    gap: 14px;
    border-bottom: 1px solid var(--line);
  }
  body.nav-open .nav { display: flex; }
  .hero-grid, .detail, .footer-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 300px; }
}
@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
  .card:hover { transform: none; }
}
@media (max-width: 860px) {
  .grid, .stats, .row, .dual, .specs { grid-template-columns: 1fr; }
  .admin-nav { position: relative; width: auto; min-height: auto; }
  .admin-main { margin-left: 0; }
}