:root {
  --ink: #111514;
  --graphite: #1d2523;
  --mist: #f2f5f1;
  --white: #ffffff;
  --line: rgba(17, 21, 20, 0.12);
  --muted: #62706b;
  --green: #1f8f78;
  --aqua: #21b7a8;
  --copper: #c86f3d;
  --gold: #d4a74f;
  --shadow: 0 28px 70px rgba(17, 21, 20, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--mist);
  font-family: Arial, "Microsoft YaHei", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.module-hidden {
  display: none !important;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 0 5vw;
  color: #fff;
  background: rgba(17, 21, 20, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(18px);
}

.brand,
.header-actions,
.lang-toggle,
.hero-actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  min-width: 230px;
  font-weight: 900;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--ink);
  background: var(--gold);
  border-radius: 8px;
  font-size: 14px;
  overflow: hidden;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
}

.nav {
  display: flex;
  gap: 28px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
}

.nav a:hover {
  color: #fff;
}

.header-actions {
  gap: 10px;
}

.lang-toggle {
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
}

.lang-btn {
  min-width: 48px;
  height: 34px;
  color: rgba(255, 255, 255, 0.72);
  background: transparent;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 800;
}

.lang-btn.active {
  color: var(--ink);
  background: #fff;
}

.mini-cta,
.button,
.product-quote,
.float-contact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 900;
}

.mini-cta {
  min-height: 42px;
  padding: 0 16px;
  color: var(--ink);
  background: var(--aqua);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.42fr);
  gap: 40px;
  align-items: end;
  min-height: 100svh;
  padding: 142px 5vw 86px;
  overflow: hidden;
  color: #fff;
}

.hero-bg,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.15) contrast(1.08);
  transition: opacity 0.35s ease;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(9, 12, 12, 0.92), rgba(9, 12, 12, 0.5) 48%, rgba(9, 12, 12, 0.18)),
    linear-gradient(0deg, rgba(9, 12, 12, 0.82), rgba(9, 12, 12, 0.02) 52%);
}

.hero-copy,
.hero-panel,
.hero-slide-ui {
  position: relative;
  z-index: 1;
}

.hero-slide-ui {
  position: absolute;
  left: 5vw;
  right: 5vw;
  bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: rgba(255, 255, 255, 0.78);
}

.hero-slide-ui p {
  max-width: 620px;
  margin: 0;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero-slide-dots {
  display: flex;
  gap: 8px;
  align-items: center;
}

.hero-slide-dots button {
  width: 38px;
  height: 3px;
  padding: 0;
  background: rgba(255, 255, 255, 0.36);
  border: 0;
  border-radius: 0;
  cursor: pointer;
}

.hero-slide-dots button.active {
  background: var(--aqua);
}

.hero-copy {
  max-width: 860px;
}

.eyebrow {
  margin: 0;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 18px 0 20px;
  max-width: 900px;
  font-size: clamp(42px, 7vw, 88px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 720px;
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 19px;
  line-height: 1.8;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  min-height: 52px;
  padding: 0 24px;
  border: 1px solid rgba(255, 255, 255, 0.34);
}

.button-primary {
  color: var(--ink);
  background: var(--aqua);
  border-color: var(--aqua);
}

.button-ghost {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.hero-panel {
  justify-self: end;
  width: min(420px, 100%);
  margin-top: 42px;
  padding: 26px;
  background: rgba(17, 21, 20, 0.44);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  backdrop-filter: blur(16px);
}

.hero-panel span {
  display: block;
  color: var(--aqua);
  font-weight: 900;
}

.hero-panel strong {
  display: block;
  margin: 10px 0;
  font-size: 24px;
}

.hero-panel p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  line-height: 1.7;
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.stat {
  min-height: 128px;
  padding: 30px 5vw 28px;
  background: #fff;
}

.stat strong {
  display: block;
  font-size: clamp(30px, 4vw, 46px);
}

.stat span {
  color: var(--muted);
}

.company-section {
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.company-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.55fr);
  gap: 48px;
  align-items: stretch;
}

.company-section .section-head {
  margin: 0;
}

.company-section .section-head p:not(.eyebrow) {
  max-width: 780px;
  font-size: 17px;
  line-height: 1.9;
}

.company-card {
  display: grid;
  gap: 18px;
  padding: 28px;
  color: #fff;
  background: var(--graphite);
  border-radius: 8px;
}

.company-card h3 {
  margin: 0;
  font-size: 26px;
}

.company-points {
  display: grid;
  gap: 12px;
}

.company-points article {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.company-points span {
  width: 10px;
  height: 10px;
  margin-top: 8px;
  background: var(--aqua);
  border-radius: 50%;
}

.company-points p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
}

.section {
  padding: 92px 5vw;
}

.industries-section {
  background: #fff;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.55fr);
  gap: 20px 44px;
  align-items: start;
  margin-bottom: 32px;
}

.section-head .eyebrow {
  grid-column: 1 / -1;
}

.section-head h2,
.factory-band h2,
.contact-section h2 {
  margin: 0;
  font-size: clamp(30px, 4.8vw, 58px);
  line-height: 1.1;
  letter-spacing: 0;
}

.section-head h2 {
  grid-column: 1;
  max-width: 780px;
}

.section-head p:last-child,
.factory-band p,
.contact-section p {
  color: var(--muted);
  line-height: 1.8;
}

.section-head p:last-child {
  grid-column: 2;
  margin: 6px 0 0;
}

.product-grid {
  display: grid;
  gap: 42px;
}

.product-category-block {
  display: grid;
  gap: 18px;
}

.product-category-head {
  position: relative;
  min-height: 230px;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: var(--graphite);
  border-radius: 8px;
}

.product-category-head::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(17, 21, 20, 0.78), rgba(17, 21, 20, 0.28) 56%, rgba(17, 21, 20, 0.08)),
    linear-gradient(0deg, rgba(17, 21, 20, 0.66), transparent 56%);
}

.product-category-head img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-category-head > div {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding: clamp(24px, 4vw, 42px);
}

.product-category-head span {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.product-category-head h3 {
  margin: 0;
  font-size: clamp(30px, 5vw, 56px);
  line-height: 1.05;
}

.product-category-head p {
  max-width: 620px;
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.72;
}

.product-category-head.plain {
  min-height: 160px;
}

.product-category-products {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.industry-card {
  display: grid;
  gap: 12px;
  padding: 22px;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.industry-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #dce4df;
  border-radius: 8px;
}

.industry-card h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.25;
}

.industry-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.industry-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.55;
}

.product-card {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 36px rgba(17, 21, 20, 0.06);
}

.product-media {
  background: #dce4df;
}

.product-media img {
  width: 100%;
  aspect-ratio: 1.15 / 1;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.product-card:hover img {
  transform: scale(1.04);
}

.product-body {
  display: grid;
  gap: 14px;
  padding: 22px;
}

.product-body span {
  width: fit-content;
  padding: 6px 10px;
  color: var(--green);
  background: rgba(31, 143, 120, 0.1);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 900;
}

.product-body h3,
.system-card h3,
.scene-card h3,
.process-list h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}

.product-body p,
.system-card p,
.scene-card p,
.process-list p,
.faq-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.72;
}

.spec-list {
  display: grid;
  gap: 8px;
}

.spec-list b {
  padding: 9px 10px;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 13px;
}

.product-body ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.5;
}

.product-quote {
  min-height: 44px;
  color: #fff;
  background: var(--green);
}

.systems-section {
  color: #fff;
  background: var(--graphite);
}

.systems-section .section-head p:last-child,
.systems-section .system-card p {
  color: rgba(255, 255, 255, 0.72);
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.system-card {
  min-height: 300px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.06);
}

.system-card span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 62px;
  color: var(--ink);
  background: var(--gold);
  border-radius: 8px;
  font-weight: 900;
}

.showcase {
  background: #fff;
}

.showcase-row {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 56px;
  align-items: center;
  padding: 84px 5vw;
  border-bottom: 1px solid var(--line);
}

.showcase-row.reverse {
  grid-template-columns: minmax(320px, 0.92fr) minmax(0, 1.08fr);
}

.showcase-row.reverse .showcase-media {
  order: 2;
}

.showcase-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #dbe4df;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.showcase-copy h2 {
  margin: 12px 0 16px;
  font-size: clamp(30px, 4.6vw, 60px);
  line-height: 1.08;
}

.showcase-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.video-section {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(360px, 1.28fr);
  gap: 44px;
  align-items: center;
  padding: 92px 5vw;
  color: #fff;
  background: linear-gradient(135deg, #111514, #203631);
}

.video-copy h2 {
  margin: 12px 0 16px;
  font-size: clamp(30px, 4.6vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

.video-copy p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.8;
}

.video-frame {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #0a0d0c;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.video-frame iframe,
.video-frame video,
.video-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: 0;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.scene-card {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.scene-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #dce4df;
}

.scene-card div {
  display: grid;
  gap: 10px;
  padding: 24px;
}

.factory-band {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(360px, 1.06fr);
  gap: 48px;
  align-items: start;
  padding: 96px 5vw;
  color: #fff;
  background: var(--ink);
}

.factory-band p {
  color: rgba(255, 255, 255, 0.72);
}

.process-list {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  background: rgba(255, 255, 255, 0.16);
}

.process-list article {
  padding: 22px;
  background: rgba(255, 255, 255, 0.06);
}

.factory-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.factory-gallery img {
  width: 100%;
  aspect-ratio: 1 / 0.78;
  object-fit: cover;
  background: #dce4df;
  border-radius: 8px;
}

.faq-section {
  background: #fff;
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.faq-list details {
  padding: 24px;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.faq-list summary {
  cursor: pointer;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.4;
}

.faq-list p {
  margin-top: 16px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 440px);
  gap: 40px;
  align-items: start;
  margin: 0;
  padding: 84px 5vw 96px;
  color: #fff;
  background: linear-gradient(135deg, var(--graphite), #143a31);
}

.contact-section p {
  color: rgba(255, 255, 255, 0.74);
}

.contact-panel {
  display: grid;
  gap: 12px;
}

.contact-panel a,
.contact-panel p {
  margin: 0;
  padding: 18px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.float-contact {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 19;
  min-height: 48px;
  padding: 0 18px;
  color: var(--ink);
  background: var(--gold);
  box-shadow: 0 16px 36px rgba(17, 21, 20, 0.24);
}

@media (max-width: 1100px) {
  .product-category-products,
  .system-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .company-layout {
    grid-template-columns: 1fr;
  }

  .nav {
    gap: 16px;
  }
}

@media (max-width: 820px) {
  .site-header {
    position: sticky;
    flex-wrap: wrap;
    min-height: 0;
    padding: 12px 5vw;
  }

  .brand {
    min-width: 0;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    gap: 8px;
    overflow-x: auto;
    font-size: 14px;
  }

  .header-actions {
    margin-left: auto;
  }

  .mini-cta {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 88vh;
    padding-top: 96px;
    padding-bottom: 86px;
  }

  .hero-slide-ui {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .hero h1 {
    font-size: clamp(38px, 12vw, 56px);
  }

  .hero-panel {
    justify-self: start;
  }

  .quick-stats,
  .industry-grid,
  .product-grid,
  .product-category-products,
  .system-grid,
  .scene-grid,
  .faq-list,
  .factory-gallery {
    grid-template-columns: 1fr;
  }

  .section,
  .factory-band,
  .contact-section {
    padding: 68px 5vw;
  }

  .section-head,
  .company-layout,
  .showcase-row,
  .showcase-row.reverse,
  .video-section,
  .factory-band,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .section-head .eyebrow,
  .section-head h2,
  .section-head p:last-child {
    grid-column: 1;
  }

  .showcase-row.reverse .showcase-media {
    order: 0;
  }
}