:root {
  --ink: #101b24;
  --ink-soft: #22313d;
  --blueprint: #0f3f5b;
  --blueprint-light: #176080;
  --signal: #ef6a2e;
  --signal-dark: #b84318;
  --steel: #dfe7ea;
  --steel-dark: #9fb0b8;
  --paper: #f4f5f2;
  --white: #fff;
  --line: rgba(16, 27, 36, .16);
  --container: 1240px;
  --shadow: 0 18px 48px rgba(8, 22, 31, .14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.7;
}
body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
.section { padding: 68px 0; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  z-index: 1000;
  left: 16px;
  top: -80px;
  padding: 10px 16px;
  color: var(--white);
  background: var(--signal-dark);
}
.skip-link:focus { top: 12px; }
.kicker {
  margin: 0 0 8px;
  color: var(--signal-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .2em;
  text-transform: uppercase;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  background: rgba(244, 245, 242, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.nav-shell { display: flex; min-height: 76px; align-items: center; gap: 24px; }
.brand { flex: 0 0 176px; }
.brand img { width: 176px; height: 63px; object-fit: contain; }
.site-nav { display: flex; align-items: center; gap: 25px; margin-left: auto; }
.site-nav a {
  position: relative;
  padding: 26px 0 24px;
  font-size: 14px;
  font-weight: 700;
}
.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 17px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--signal);
  transform: scaleX(0);
  transition: transform .2s ease;
}
.site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); }
.nav-contact {
  display: grid;
  flex: 0 0 auto;
  padding: 8px 14px;
  color: var(--white);
  background: var(--ink);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.25;
}
.nav-contact span { color: #b8c5ca; font-size: 10px; letter-spacing: .13em; }
.nav-toggle { display: none; }

.hero {
  color: var(--white);
  background:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px),
    var(--ink);
  background-size: 38px 38px;
}
.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(440px, .92fr);
  gap: 42px;
  min-height: 620px;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
}
.hero-copy { position: relative; z-index: 2; }
.eyebrow { display: flex; gap: 15px; align-items: center; margin: 0 0 20px; }
.eyebrow span { padding: 5px 9px; color: var(--white); background: var(--signal); font-size: 11px; font-weight: 800; letter-spacing: .17em; }
.eyebrow b { color: #aebbc1; font-size: 12px; letter-spacing: .13em; }
.hero h1 { max-width: 770px; margin: 0; font-size: clamp(36px, 3.5vw, 54px); line-height: 1.12; letter-spacing: -.035em; text-wrap: balance; }
.hero-lead { max-width: 740px; margin: 0; color: #c5ced2; font-size: 16px; }
.hero-phone { margin: 15px 0 0; color: #eef2f3; font-weight: 700; }
.hero-phone a { color: #ff9a6b; font-size: 19px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 0; margin-top: 20px; }
.hero-tags span { padding: 7px 12px; border: 1px solid rgba(255,255,255,.18); color: #cbd4d8; font-size: 13px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button { display: inline-flex; min-height: 47px; align-items: center; justify-content: center; padding: 10px 18px; border: 1px solid transparent; font-weight: 800; transition: background .2s ease, border-color .2s ease, color .2s ease; }
.button-primary { color: var(--white); background: var(--signal); }
.button-primary:hover, .button-primary:focus-visible { background: var(--signal-dark); }
.button-line { color: var(--white); border-color: rgba(255,255,255,.42); }
.button-line:hover, .button-line:focus-visible { color: var(--ink); background: var(--white); }

.hero-blueprint {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 36px 18px 18px;
  background:
    linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px),
    var(--blueprint);
  background-size: 25px 25px;
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: var(--shadow);
}
.hero-blueprint figure { margin: 0; overflow: hidden; background: var(--white); }
.blueprint-index { position: absolute; top: 11px; left: 20px; display: flex; gap: 13px; align-items: center; color: #b8d5e2; font-size: 10px; letter-spacing: .16em; }
.blueprint-index strong { color: var(--white); font-size: 13px; }
.hero-main-image { grid-column: 1 / -1; }
.hero-main-image img { width: 100%; height: 310px; object-fit: cover; }
.hero-side-image img, .hero-product-image img { width: 100%; height: 136px; }
.hero-side-image img { object-fit: cover; }
.hero-product-image img { object-fit: contain; }
.hero-blueprint figcaption { display: flex; min-height: 40px; align-items: center; justify-content: space-between; gap: 8px; padding: 7px 9px; color: var(--ink); font-size: 11px; }
.hero-blueprint figcaption span { color: var(--signal-dark); font-size: 9px; letter-spacing: .1em; }
.hero-blueprint figcaption strong { font-size: 13px; }

.capability-strip { color: var(--white); background: var(--blueprint); border-top: 4px solid var(--signal); }
.capability-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)) 1.35fr 1.65fr; }
.capability-grid > div { display: flex; min-height: 122px; flex-direction: column; justify-content: center; padding: 17px 15px; border-right: 1px solid rgba(255,255,255,.15); }
.capability-grid > div:first-child { border-left: 1px solid rgba(255,255,255,.15); }
.capability-grid span { color: #a8c7d4; font-size: 11px; }
.capability-grid strong { font-size: 25px; line-height: 1.25; }
.capability-grid small { padding-left: 3px; font-size: 12px; font-weight: 700; }
.capability-grid .words { font-size: 14px; line-height: 1.55; }

.local-demand { padding: 58px 0; color: var(--white); background: var(--signal); }
.demand-layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); align-items: stretch; }
.demand-code { display: flex; flex-direction: column; justify-content: center; padding: 18px 30px 18px 0; border-right: 1px solid rgba(255,255,255,.4); }
.demand-code span { font-size: 10px; font-weight: 800; letter-spacing: .18em; }
.demand-code strong { font-size: 64px; line-height: 1; }
.demand-code b { margin-top: 8px; font-size: 18px; }
.demand-copy { padding-left: 38px; }
.demand-copy .kicker { color: #50210e; }
.demand-copy h2 { margin: 0 0 12px; font-size: clamp(27px, 3vw, 41px); line-height: 1.25; }
.demand-copy p { max-width: 900px; margin: 0; }
.demand-copy a { display: inline-block; margin-top: 12px; padding-bottom: 2px; border-bottom: 1px solid rgba(255,255,255,.65); font-weight: 800; }

.engineering-section { background: var(--white); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 30px; }
.section-heading h2 { max-width: 750px; margin: 0; font-size: clamp(28px, 3.4vw, 44px); line-height: 1.25; letter-spacing: -.025em; }
.section-heading > p { max-width: 430px; margin: 0; color: #57656d; }
.engineering-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.engineering-grid article { min-height: 205px; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.engineering-grid article:hover { background: #edf3f5; }
.engineering-grid span { display: block; margin-bottom: 25px; color: var(--signal-dark); font-family: Consolas, monospace; font-size: 13px; font-weight: 800; }
.engineering-grid h3 { margin: 0 0 8px; font-size: 18px; }
.engineering-grid p { margin: 0; color: #5c6870; font-size: 14px; }

.workflow-section { padding: 66px 0; color: var(--white); background: var(--ink-soft); }
.workflow-heading { display: grid; grid-template-columns: 1fr 2fr 1.2fr; gap: 25px; align-items: end; margin-bottom: 32px; }
.workflow-heading .kicker { color: #f08b5c; }
.workflow-heading h2 { margin: 0; font-size: clamp(28px, 3.1vw, 42px); line-height: 1.23; }
.workflow-heading > p:last-child { margin: 0; color: #aebbc1; }
.workflow-track { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.2); border-left: 1px solid rgba(255,255,255,.2); }
.workflow-track li { display: grid; grid-template-columns: 44px 1fr; gap: 10px; min-height: 154px; padding: 19px 16px; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.workflow-track li > span { color: #ff8f5c; font-family: Consolas, monospace; font-weight: 800; }
.workflow-track strong { display: block; margin-bottom: 6px; font-size: 17px; }
.workflow-track p { margin: 0; color: #aebbc1; font-size: 13px; }

.gallery-section { background: #e9edef; }
.mold-gallery { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 14px; }
.gallery-item { grid-column: span 3; margin: 0; overflow: hidden; background: var(--white); border-bottom: 3px solid transparent; }
.gallery-item:nth-child(1), .gallery-item:nth-child(2) { grid-column: span 6; }
.gallery-item:hover { border-bottom-color: var(--signal); }
.gallery-item img { width: 100%; height: 220px; object-fit: contain; background: #f8f8f6; }
.gallery-item:nth-child(1) img, .gallery-item:nth-child(2) img { height: 320px; object-fit: cover; }
.gallery-equipment img { object-fit: cover; }
.gallery-item figcaption { display: flex; min-height: 54px; align-items: center; gap: 13px; padding: 10px 13px; }
.gallery-item figcaption span { color: var(--signal-dark); font-family: Consolas, monospace; font-size: 11px; }
.gallery-item figcaption strong { font-size: 14px; }

.technical-conditions { color: var(--white); background: var(--blueprint); }
.conditions-layout { display: grid; grid-template-columns: minmax(280px, .75fr) minmax(0, 1.25fr); gap: 58px; }
.conditions-title > span { display: inline-block; margin-bottom: 26px; padding: 6px 9px; color: var(--white); background: var(--signal); font-size: 10px; font-weight: 800; letter-spacing: .15em; }
.conditions-title .kicker { color: #9fc7d8; }
.conditions-title h2 { margin: 0; font-size: clamp(29px, 3.4vw, 45px); line-height: 1.24; }
.conditions-copy > p { margin: 4px 0 24px; color: #d4e1e6; font-size: 16px; }
.condition-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.condition-tags span { padding: 7px 10px; border: 1px solid rgba(255,255,255,.25); color: #d6e6ec; font-size: 12px; }

.equipment-section { background: var(--white); }
.equipment-visuals { display: grid; grid-template-columns: 1.15fr 1fr 1fr; gap: 13px; }
.equipment-visuals figure { position: relative; margin: 0; overflow: hidden; background: #dfe5e8; }
.equipment-visuals img { width: 100%; height: 275px; object-fit: cover; }
.equipment-visuals figure:nth-child(3) img { object-fit: contain; }
.equipment-visuals figcaption { position: absolute; right: 10px; bottom: 10px; padding: 6px 10px; color: var(--white); background: rgba(16,27,36,.85); font-size: 12px; font-weight: 800; }
.equipment-ledger { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); margin-top: 20px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.equipment-ledger > div { padding: 18px 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.equipment-ledger span { color: var(--signal-dark); font-family: Consolas, monospace; font-size: 11px; }
.equipment-ledger strong { display: block; margin: 6px 0; font-size: 18px; }
.equipment-ledger p { margin: 0; color: #5b6870; font-size: 13px; }

.quality-section { background: #dfe7ea; }
.quality-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(420px, .9fr); gap: 45px; align-items: start; }
.quality-copy h2 { margin: 0 0 24px; font-size: clamp(29px, 3.3vw, 44px); line-height: 1.25; }
.quality-data { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(16,27,36,.24); border-left: 1px solid rgba(16,27,36,.24); }
.quality-data > div { padding: 17px; border-right: 1px solid rgba(16,27,36,.24); border-bottom: 1px solid rgba(16,27,36,.24); }
.quality-data span { display: block; color: #53636c; font-size: 12px; }
.quality-data strong { font-size: 28px; }
.quality-data small { padding-left: 3px; font-size: 12px; }
.quality-disclaimer { margin: 18px 0 0; padding-left: 13px; border-left: 4px solid var(--signal); color: #43535c; font-size: 13px; }
.certificate-panel { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.certificate-panel figure { margin: 0; padding: 10px; background: var(--white); box-shadow: 0 10px 28px rgba(16,27,36,.08); }
.certificate-panel img { width: 100%; height: 230px; object-fit: contain; }
.certificate-panel figcaption { padding-top: 9px; border-top: 1px solid var(--line); }
.certificate-panel figcaption span { display: block; color: #68767d; font-size: 10px; }
.certificate-panel figcaption strong { font-size: 13px; }

.faq-section { background: var(--white); }
.faq-layout { display: grid; grid-template-columns: minmax(240px, .58fr) minmax(0, 1.42fr); gap: 58px; align-items: start; }
.faq-heading { position: sticky; top: 108px; }
.faq-heading h2 { margin: 0 0 14px; font-size: clamp(30px, 3.3vw, 43px); line-height: 1.24; }
.faq-heading > p:not(.kicker) { color: #5b6870; }
.faq-heading a { display: inline-block; margin-top: 8px; padding-bottom: 3px; border-bottom: 2px solid var(--signal); font-weight: 800; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 18px 50px 18px 4px; cursor: pointer; font-size: 17px; font-weight: 800; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; top: 15px; right: 5px; content: "+"; color: var(--signal-dark); font-size: 26px; line-height: 1; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -4px 0 18px; padding: 0 48px 0 4px; color: #56636b; }

.contact-section { padding: 64px 0; color: var(--white); background: var(--ink); }
.contact-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); gap: 60px; align-items: center; }
.contact-layout .kicker { color: #f08b5c; }
.contact-layout h2 { max-width: 780px; margin: 0 0 13px; font-size: clamp(31px, 4vw, 51px); line-height: 1.18; }
.contact-layout > div > p:last-child { max-width: 760px; margin: 0; color: #b9c4c8; }
.contact-card { display: grid; padding: 26px; background: var(--blueprint); border-left: 5px solid var(--signal); }
.contact-card > span { color: #9fc1cf; font-size: 10px; font-weight: 800; letter-spacing: .18em; }
.contact-card > strong { margin-top: 9px; font-size: 20px; }
.contact-card > a:not(.button) { color: #ff9564; font-size: 30px; font-weight: 900; line-height: 1.3; }
.contact-card p { margin: 8px 0 18px; color: #c1d3da; font-size: 12px; }

.site-footer { padding: 42px 0 22px; color: #c4ced2; background: #0a1218; }
.footer-grid { display: grid; grid-template-columns: 1.25fr 1.4fr .9fr .8fr; gap: 35px; }
.footer-grid img { width: 170px; height: 61px; padding: 6px; object-fit: contain; background: var(--white); }
.footer-grid strong { color: var(--white); font-size: 13px; }
.footer-grid p { margin: 8px 0 0; font-size: 12px; }
.footer-grid a { color: #ff9666; }
.footer-bottom { display: flex; justify-content: space-between; margin-top: 28px; padding-top: 15px; border-top: 1px solid rgba(255,255,255,.13); font-size: 11px; }
.mobile-cta { display: none; }

@media (max-width: 1120px) {
  .site-nav { gap: 16px; }
  .nav-contact span { display: none; }
  .hero-layout { grid-template-columns: minmax(0, 1fr) minmax(390px, .78fr); gap: 32px; }
  .capability-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .capability-grid > div:nth-child(4) { border-left: 1px solid rgba(255,255,255,.15); }
  .equipment-ledger { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .container { width: min(100% - 36px, var(--container)); }
  .nav-shell { min-height: 68px; }
  .brand { flex-basis: 150px; }
  .brand img { width: 150px; height: 54px; }
  .nav-contact { margin-left: auto; }
  .nav-toggle { display: grid; width: 42px; height: 42px; place-content: center; gap: 5px; padding: 0; border: 1px solid var(--line); background: transparent; }
  .nav-toggle span:not(.sr-only) { display: block; width: 20px; height: 2px; background: var(--ink); }
  .site-nav { position: fixed; top: 68px; right: 0; bottom: 0; left: 0; display: none; align-items: stretch; padding: 24px; background: var(--paper); }
  .site-nav.is-open { display: grid; align-content: start; }
  .site-nav a { padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 17px; }
  .site-nav a::after { display: none; }
  .hero-layout { grid-template-columns: 1fr; min-height: 0; padding-top: 44px; }
  .hero-copy { max-width: 760px; }
  .hero-blueprint { max-width: 690px; }
  .engineering-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .workflow-heading { grid-template-columns: 1fr; gap: 8px; }
  .workflow-track { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gallery-item, .gallery-item:nth-child(1), .gallery-item:nth-child(2) { grid-column: span 6; }
  .gallery-item img, .gallery-item:nth-child(1) img, .gallery-item:nth-child(2) img { height: 265px; object-fit: contain; }
  .gallery-equipment img { object-fit: cover; }
  .conditions-layout { gap: 34px; }
  .quality-layout { grid-template-columns: 1fr; }
  .certificate-panel { max-width: 650px; }
  .faq-layout { grid-template-columns: 1fr; gap: 25px; }
  .faq-heading { position: static; }
  .contact-layout { grid-template-columns: 1fr; gap: 30px; }
  .contact-card { max-width: 520px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .section { padding: 48px 0; }
  .container { width: min(100% - 28px, var(--container)); }
  .nav-contact { display: none; }
  .hero-layout { gap: 32px; padding-top: 36px; padding-bottom: 36px; }
  .eyebrow { display: grid; gap: 7px; }
  .eyebrow span { width: fit-content; }
  .hero h1 { font-size: clamp(32px, 9.5vw, 43px); }
  .hero-lead { font-size: 15px; }
  .hero-actions { display: grid; }
  .hero-blueprint { padding: 40px 12px 12px; }
  .hero-main-image img { height: 280px; }
  .hero-side-image img, .hero-product-image img { height: 130px; }
  .hero-blueprint figcaption { align-items: flex-start; flex-direction: column; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .capability-grid > div { min-height: 105px; }
  .capability-grid > div:nth-child(odd) { border-left: 1px solid rgba(255,255,255,.15); }
  .demand-layout { grid-template-columns: 1fr; }
  .demand-code { flex-direction: row; align-items: baseline; justify-content: flex-start; gap: 13px; padding: 0 0 16px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.4); }
  .demand-code strong { font-size: 38px; }
  .demand-copy { padding: 20px 0 0; }
  .section-heading { display: grid; gap: 12px; }
  .engineering-grid { grid-template-columns: 1fr; }
  .engineering-grid article { min-height: 0; }
  .engineering-grid span { margin-bottom: 12px; }
  .workflow-track { grid-template-columns: 1fr; }
  .workflow-track li { min-height: 0; }
  .gallery-item, .gallery-item:nth-child(1), .gallery-item:nth-child(2) { grid-column: 1 / -1; }
  .gallery-item img, .gallery-item:nth-child(1) img, .gallery-item:nth-child(2) img { height: 270px; }
  .conditions-layout { grid-template-columns: 1fr; }
  .conditions-title > span { margin-bottom: 14px; }
  .equipment-visuals { grid-template-columns: 1fr; }
  .equipment-visuals img { height: 250px; }
  .equipment-ledger { grid-template-columns: 1fr; }
  .certificate-panel { grid-template-columns: 1fr 1fr 1fr; }
  .certificate-panel img { height: 175px; }
  .contact-card > a:not(.button) { font-size: 25px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { gap: 12px; flex-direction: column; }
  .site-footer { padding-bottom: 78px; }
  .mobile-cta { position: fixed; z-index: 99; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: 1fr 1fr; min-height: 54px; box-shadow: 0 -8px 24px rgba(0,0,0,.15); }
  .mobile-cta a { display: grid; place-items: center; color: var(--white); background: var(--blueprint); font-weight: 800; }
  .mobile-cta a:last-child { background: var(--signal); }
}

@media (max-width: 460px) {
  .capability-grid { grid-template-columns: 1fr; }
  .capability-grid > div { min-height: 90px; border-left: 1px solid rgba(255,255,255,.15); }
  .quality-data { grid-template-columns: 1fr; }
  .certificate-panel { grid-template-columns: 1fr; }
  .certificate-panel img { height: 260px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}