:root {
  --ink: #121820;
  --muted: #607083;
  --paper: #f1f6f3;
  --white: #ffffff;
  --line: #d3e2da;
  --blue: #16a34a;
  --blue-dark: #126a38;
  --cyan: #8bf0aa;
  --dark: #07130f;
  --dark-2: #102b20;
  --steel: #263b32;
  --success: #087b57;
  --content: 1320px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 30px;
  min-height: 76px;
  padding: 12px max(28px, calc((100vw - var(--content)) / 2));
  color: var(--white);
  background: rgba(7, 19, 15, .97);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  backdrop-filter: blur(12px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 50px;
  height: 42px;
  color: var(--white);
  background: var(--blue);
  font-size: 18px;
  font-weight: 900;
  border-radius: 4px;
}
.brand-copy strong,
.brand-copy small { display: block; }
.brand-copy strong { font-size: 17px; }
.brand-copy small {
  margin-top: 3px;
  color: #aebdca;
  font-size: 11px;
  text-transform: uppercase;
}
nav {
  display: flex;
  justify-content: center;
  gap: 24px;
  color: #d6e1e9;
  font-size: 13px;
  white-space: nowrap;
}
nav a { padding: 10px 0; }
nav a:hover,
nav a:focus-visible { color: var(--cyan); }
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  color: var(--white);
  background: var(--blue);
  border: 1px solid #3ac76c;
  border-radius: 5px;
  font-size: 13px;
  font-weight: 800;
}
.header-cta:hover,
.header-cta:focus-visible { background: #138a40; }

.hero { background: var(--dark); }
.hero img {
  width: 100%;
  aspect-ratio: 1600 / 920;
  object-fit: cover;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 1480px;
  margin: -1px auto 0;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.trust-strip div {
  min-height: 144px;
  padding: 25px 30px;
  border-right: 1px solid var(--line);
}
.trust-strip div:last-child { border-right: 0; }
.trust-strip .metric,
.trust-strip strong,
.trust-strip small { display: block; }
.trust-strip .metric {
  color: var(--blue);
  font-size: 26px;
  font-weight: 900;
}
.trust-strip strong {
  margin-top: 7px;
  font-size: 16px;
}
.trust-strip small {
  margin-top: 7px;
  color: var(--muted);
  line-height: 1.4;
}

.section,
.packaging-section,
.inquiry-section {
  padding: 86px max(32px, calc((100vw - var(--content)) / 2));
}
.section-heading {
  max-width: 870px;
  margin-bottom: 36px;
}
.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .72fr);
  align-items: end;
  gap: 60px;
  max-width: none;
}
.eyebrow {
  margin: 0 0 13px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}
h1, h2, h3 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: 0;
}
h1 { font-size: clamp(40px, 4vw, 58px); }
h2 { font-size: clamp(34px, 3.4vw, 48px); }
.section-heading > p:not(.eyebrow),
.split-heading > p,
.feature-intro > p:not(.eyebrow),
.inquiry-copy > p:not(.eyebrow) {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.62;
}
.split-heading > p { margin: 0 0 4px; }

.wide-image {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}
.color-display { background: #edf3f8; }
.overview { background: #f7f9fb; }
.large-head-series { background: #ffffff; }
.large-head-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(390px, .8fr);
  gap: 20px;
}
.large-head-grid figure {
  margin: 0;
  overflow: hidden;
  background: #f4f7f9;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.large-head-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.large-head-grid figcaption { min-height: 190px; padding: 25px 28px; background: #fff; }
.large-head-grid figcaption span,
.large-head-grid figcaption strong { display: block; }
.large-head-grid figcaption span { color: var(--blue); font-size: 12px; font-weight: 900; text-transform: uppercase; }
.large-head-grid figcaption strong { margin-top: 10px; font-size: 23px; }
.large-head-grid figcaption p { margin: 11px 0 0; color: var(--muted); font-size: 14px; line-height: 1.55; }
.mounting-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 20px;
  background: #284057;
  border: 1px solid #284057;
}
.mounting-facts article { min-height: 170px; padding: 25px; color: #fff; background: var(--dark); }
.mounting-facts span,
.mounting-facts strong { display: block; }
.mounting-facts span { color: var(--cyan); font-size: 12px; font-weight: 900; }
.mounting-facts strong { margin-top: 17px; font-size: 19px; }
.mounting-facts p { margin: 9px 0 0; color: #bccbd6; font-size: 14px; line-height: 1.5; }
.buyer-fit {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 24px;
  background: var(--line);
  border: 1px solid var(--line);
}
.buyer-fit article {
  min-height: 190px;
  padding: 28px;
  background: var(--white);
}
.buyer-fit span,
.buyer-fit strong { display: block; }
.buyer-fit span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}
.buyer-fit strong {
  margin-top: 20px;
  font-size: 21px;
}
.buyer-fit p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.feature-band {
  display: grid;
  grid-template-columns: minmax(0, .7fr) minmax(580px, 1fr);
  gap: 60px;
  align-items: center;
  padding: 88px max(34px, calc((100vw - var(--content)) / 2));
  color: var(--white);
  background: linear-gradient(125deg, #07111b 0%, #102b43 54%, #09131e 100%);
}
.feature-band .eyebrow,
.quality-band .eyebrow,
.inquiry-section .eyebrow { color: var(--cyan); }
.feature-intro > p:not(.eyebrow) { color: #c8d6e1; }
.material-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.material-list li {
  padding: 8px 11px;
  color: #e7f3fa;
  border: 1px solid rgba(255, 255, 255, .18);
  font-size: 12px;
}
.detail-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.detail-list article {
  min-height: 176px;
  padding: 24px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 6px;
}
.detail-list span,
.detail-list strong { display: block; }
.detail-list span {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
}
.detail-list strong {
  margin-top: 17px;
  font-size: 20px;
}
.detail-list p {
  margin: 9px 0 0;
  color: #c5d4df;
  font-size: 14px;
  line-height: 1.5;
}

.detail-visual { background: #eaf0f5; }
.master-detail { margin-bottom: 20px; }
.detail-image-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.detail-card {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.detail-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--dark);
}
.detail-card div { min-height: 190px; padding: 24px; }
.detail-card span,
.detail-card strong { display: block; }
.detail-card span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}
.detail-card strong { margin-top: 11px; font-size: 21px; }
.detail-card p {
  margin: 11px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.specifications { background: var(--white); }
.spec-layout {
  display: grid;
  grid-template-columns: minmax(380px, .72fr) minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
}
.size-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #f7fafc;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.size-visual img { width: 100%; height: 100%; object-fit: contain; }
.spec-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.spec-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 26px;
  color: var(--white);
  background: var(--steel);
}
.spec-header span { color: #c8d6e0; font-size: 13px; text-transform: uppercase; }
.spec-header strong { font-size: 26px; }
.spec-panel dl { margin: 0; }
.spec-panel dl div {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 20px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
}
.spec-panel dt { color: var(--muted); font-size: 14px; font-weight: 700; }
.spec-panel dd { margin: 0; font-size: 14px; font-weight: 800; }
.reference-note {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 20px;
  padding: 20px 24px;
  background: #eef7fd;
}
.reference-note strong { color: var(--blue-dark); font-size: 14px; }
.reference-note span { color: var(--muted); font-size: 13px; line-height: 1.5; }
.quotation-checklist {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding: 18px 22px;
  color: var(--muted);
  background: #f3f7fa;
  border-left: 4px solid var(--blue);
}
.m10-spec-panel {
  margin-top: 24px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.m10-spec-panel dl {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin: 0;
}
.m10-spec-panel dl div {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 18px;
  padding: 19px 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.m10-spec-panel dl div:nth-child(2n) { border-right: 0; }
.m10-spec-panel dt { color: var(--muted); font-size: 13px; font-weight: 700; }
.m10-spec-panel dd { margin: 0; font-size: 14px; font-weight: 800; }
.quotation-checklist strong { margin-right: auto; color: var(--ink); }
.quotation-checklist span {
  padding: 7px 10px;
  color: var(--blue-dark);
  background: var(--white);
  border: 1px solid var(--line);
  font-size: 12px;
  font-weight: 800;
}

.applications { background: #f7f9fb; }
.application-tags {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  margin-top: 18px;
  border: 1px solid var(--line);
}
.large-application {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr);
  margin-top: 20px;
  overflow: hidden;
  color: #fff;
  background: var(--dark);
  border-radius: 6px;
}
.large-application img { width: 100%; height: 100%; min-height: 430px; object-fit: cover; }
.large-application > div { align-self: center; padding: 42px; }
.large-application h3 { font-size: 32px; }
.large-application p { color: #c3d1dc; line-height: 1.6; }
.large-application ul { margin: 22px 0 0; padding-left: 20px; color: #d7e3eb; line-height: 1.8; }
.application-tags span {
  padding: 16px 10px;
  text-align: center;
  background: var(--white);
  border-right: 1px solid var(--line);
  font-size: 13px;
  font-weight: 800;
}
.application-tags span:last-child { border-right: 0; }
.safety-note {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  margin-top: 18px;
  padding: 22px 24px;
  color: #d7e3ec;
  background: var(--dark);
}
.safety-note strong { color: var(--cyan); }
.safety-note p { margin: 0; line-height: 1.5; }

.quality-band {
  padding: 88px max(34px, calc((100vw - var(--content)) / 2));
  color: var(--white);
  background: linear-gradient(112deg, #06110d, #153d2b 68%, #091a13);
}
.light-heading p:not(.eyebrow) { color: #c4d3df; }
.quality-flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, .17);
  border: 1px solid rgba(255, 255, 255, .17);
}
.quality-flow article {
  min-height: 210px;
  padding: 28px;
  background: rgba(7, 19, 15, .74);
}
.quality-flow span,
.quality-flow strong { display: block; }
.quality-flow span { color: var(--cyan); font-size: 13px; font-weight: 900; }
.quality-flow strong { margin-top: 25px; font-size: 21px; }
.quality-flow p { margin: 11px 0 0; color: #bdccd7; font-size: 14px; line-height: 1.55; }

.packaging-section { background: #edf2f6; }
.packaging-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 18px;
}
.packaging-grid article {
  min-height: 168px;
  padding: 25px;
  background: var(--white);
  border-top: 4px solid var(--blue);
}
.packaging-grid span,
.packaging-grid strong { display: block; }
.packaging-grid span { color: var(--blue); font-size: 12px; font-weight: 900; }
.packaging-grid strong { margin-top: 17px; font-size: 22px; }
.packaging-grid p { margin: 10px 0 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
.packaging-image { background: var(--dark); }
.order-flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin-top: 18px;
  background: var(--white);
  border: 1px solid var(--line);
}
.order-flow div {
  min-height: 142px;
  padding: 22px;
  border-right: 1px solid var(--line);
}
.order-flow div:last-child { border-right: 0; }
.order-flow span,
.order-flow strong,
.order-flow small { display: block; }
.order-flow span { color: var(--blue); font-size: 20px; font-weight: 900; }
.order-flow strong { margin-top: 13px; font-size: 15px; }
.order-flow small { margin-top: 8px; color: var(--muted); line-height: 1.4; }

.inquiry-section {
  display: grid;
  grid-template-columns: minmax(0, .7fr) minmax(560px, 1fr);
  gap: 70px;
  align-items: start;
  color: var(--white);
  background: var(--dark);
}
.inquiry-copy > p:not(.eyebrow) { color: #c4d2dd; }
.factory-contact {
  margin-top: 35px;
  padding: 23px 0 0;
  border-top: 1px solid rgba(255, 255, 255, .16);
}
.factory-contact strong,
.factory-contact span { display: block; }
.factory-contact strong { margin-bottom: 12px; font-size: 18px; }
.factory-contact span { margin-top: 7px; color: #aebfcb; font-size: 13px; line-height: 1.45; }
.inquiry-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: 28px;
  color: var(--ink);
  background: var(--white);
  border-radius: 6px;
}
.inquiry-form label > span,
.message-preview > span {
  display: block;
  margin-bottom: 8px;
  color: var(--steel);
  font-size: 12px;
  font-weight: 800;
}
.inquiry-form input,
.inquiry-form select,
.inquiry-form textarea {
  width: 100%;
  padding: 13px 14px;
  color: var(--ink);
  background: #f7f9fb;
  border: 1px solid #cfdbe4;
  border-radius: 4px;
  outline: 0;
}
.inquiry-form input,
.inquiry-form select { min-height: 48px; }
.inquiry-form textarea { resize: vertical; line-height: 1.5; }
.inquiry-form input:focus,
.inquiry-form select:focus,
.inquiry-form textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(6, 127, 216, .12); }
.full-field { grid-column: 1 / -1; }
.inquiry-form button {
  min-height: 49px;
  padding: 0 22px;
  color: var(--white);
  background: var(--blue);
  border: 0;
  border-radius: 4px;
  font-weight: 900;
}
.inquiry-form button:hover,
.inquiry-form button:focus-visible { background: #078de9; }
.copy-status {
  display: flex;
  align-items: center;
  color: var(--success);
  font-size: 13px;
  font-weight: 800;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 28px max(32px, calc((100vw - var(--content)) / 2));
  color: #99aab7;
  background: #04090e;
}
footer div:last-child { text-align: right; }
footer strong,
footer span { display: block; }
footer strong { color: var(--white); }
footer span { margin-top: 5px; font-size: 12px; }

@media (max-width: 1150px) {
  .topbar { grid-template-columns: auto 1fr; }
  nav { display: none; }
  .header-cta { justify-self: end; }
  .buyer-fit,
  .quality-flow { grid-template-columns: repeat(2, 1fr); }
  .feature-band,
  .spec-layout,
  .inquiry-section,
  .large-head-grid,
  .large-application { grid-template-columns: 1fr; }
  .mounting-facts { grid-template-columns: repeat(2, 1fr); }
  .application-tags { grid-template-columns: repeat(3, 1fr); }
  .application-tags span:nth-child(3) { border-right: 0; }
  .application-tags span:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .order-flow { grid-template-columns: repeat(3, 1fr); }
  .order-flow div:nth-child(3) { border-right: 0; }
  .order-flow div:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 780px) {
  .topbar {
    position: static;
    grid-template-columns: 1fr auto;
    gap: 15px;
    padding: 11px 16px;
  }
  .brand { min-width: 0; }
  .brand-mark { width: 44px; }
  .brand-copy small { display: none; }
  .header-cta { min-height: 40px; padding: 0 12px; }
  .hero img { aspect-ratio: 1600 / 920; object-fit: contain; }
  .trust-strip { grid-template-columns: repeat(2, 1fr); }
  .trust-strip div { min-height: 132px; padding: 21px; border-bottom: 1px solid var(--line); }
  .section,
  .feature-band,
  .quality-band,
  .packaging-section,
  .inquiry-section { padding: 60px 20px; }
  .split-heading { grid-template-columns: 1fr; gap: 18px; }
  .split-heading > p { margin: 0; }
  .buyer-fit,
  .detail-list,
  .detail-image-grid,
  .quality-flow,
  .packaging-grid,
  .mounting-facts,
  .m10-spec-panel dl { grid-template-columns: 1fr; }
  .m10-spec-panel dl div { grid-template-columns: 1fr; gap: 6px; border-right: 0; }
  .buyer-fit article,
  .quality-flow article { min-height: 0; }
  .spec-panel dl div,
  .reference-note { grid-template-columns: 1fr; gap: 5px; }
  .quotation-checklist { flex-wrap: wrap; }
  .quotation-checklist strong { width: 100%; }
  .application-tags { grid-template-columns: repeat(2, 1fr); }
  .application-tags span { border-bottom: 1px solid var(--line); }
  .application-tags span:nth-child(2n) { border-right: 0; }
  .safety-note { grid-template-columns: 1fr; }
  .order-flow { grid-template-columns: 1fr; }
  .order-flow div,
  .order-flow div:nth-child(3) { border-right: 0; border-bottom: 1px solid var(--line); }
  .inquiry-form { grid-template-columns: 1fr; padding: 22px; }
  .full-field { grid-column: auto; }
  footer,
  footer div:last-child { flex-direction: column; text-align: left; }
}