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

:root {
  --ink: #17232c;
  --muted: #5f7180;
  --line: #e3edf4;
  --blue: #2d81bd;
  --pink: #f6a8bd;
  --soft: #f7fafb;
  --footer: #172028;
}

body {
  background: #fff;
  color: var(--ink);
  font-family: Arial, "Helvetica Neue", sans-serif;
  overflow-x: hidden;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6vw;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(227, 237, 244, .86);
  backdrop-filter: blur(14px);
}

.logo img {
  height: 46px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #2d3c46;
  font-size: 14px;
}

.main-nav a:hover {
  color: var(--blue);
}

.mobile-menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  box-shadow: 0 8px 20px rgba(31, 67, 92, .08);
  cursor: pointer;
}

.mobile-menu-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: var(--blue);
  transition: transform .2s ease, opacity .2s ease;
}

body.nav-open .mobile-menu-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

body.nav-open .mobile-menu-toggle span:nth-child(2) {
  opacity: 0;
}

body.nav-open .mobile-menu-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.lang-link {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.hero {
  position: relative;
  min-height: 720px;
  padding: 160px 6vw 80px;
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #f8fbfc;
}

.sub-hero {
  position: relative;
  min-height: 430px;
  padding: 140px 6vw 70px;
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #f8fbfc;
}

.sub-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(255,255,255,.96) 0%, rgba(255,255,255,.84) 48%, rgba(255,255,255,.2) 100%);
}

.sub-hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sub-hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.sub-hero h1 {
  font-size: clamp(42px, 5.2vw, 68px);
  line-height: 1.08;
  font-weight: 600;
}

.sub-hero p {
  max-width: 640px;
  margin-top: 22px;
  color: #536875;
  font-size: 18px;
  line-height: 1.75;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,.98) 0%, rgba(255,255,255,.92) 43%, rgba(255,255,255,.28) 100%);
  z-index: 1;
}

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

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 690px;
}

.eyebrow {
  display: block;
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 13px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(44px, 6vw, 78px);
  line-height: 1.02;
  font-weight: 600;
  letter-spacing: 0;
}

.hero p {
  max-width: 620px;
  margin-top: 26px;
  color: #536875;
  font-size: 19px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid var(--blue);
  color: var(--blue);
  font-size: 15px;
  font-weight: 600;
}

.btn.primary {
  background: var(--blue);
  color: #fff;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.trust-row span {
  padding: 7px 12px;
  border: 1px solid #cfe3ef;
  border-radius: 999px;
  color: #31586f;
  background: rgba(255,255,255,.72);
  font-size: 14px;
}

.section {
  padding: 96px 6vw;
}

.section.soft {
  background: var(--soft);
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(320px, .7fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 38px;
}

.section h2 {
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.12;
  font-weight: 500;
}

.section-head p,
.lead {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.category-card,
.feature-card,
.faq-item,
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 18px 45px rgba(31,67,92,.045);
}

.category-card img {
  width: 100%;
  height: 190px;
  object-fit: contain;
  padding: 20px;
  background: linear-gradient(135deg, #fbfdfe, #f1f7f9);
}

.category-card div {
  padding: 22px;
}

.category-card small,
.feature-card small {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.category-card h3,
.feature-card h3,
.contact-card h3 {
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 21px;
  line-height: 1.35;
  font-weight: 500;
}

.category-card p,
.feature-card p,
.contact-card p,
.faq-item p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.product-family {
  display: grid;
  grid-template-columns: minmax(280px, .85fr) minmax(0, 1.15fr);
  gap: 34px;
  align-items: stretch;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 45px rgba(31,67,92,.045);
}

.product-family + .product-family {
  margin-top: 20px;
}

.family-media {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
  border-radius: 8px;
  background: linear-gradient(135deg, #fbfdfe, #eef6fa);
  overflow: hidden;
}

.family-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 18px;
}

.family-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.family-content h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 3vw, 42px);
}

.family-content p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 20px 0 24px;
}

.product-tags span {
  padding: 7px 10px;
  border: 1px solid #cfe3ef;
  border-radius: 999px;
  color: #31586f;
  background: #f7fbfd;
  font-size: 13px;
}

.buyer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.buyer-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.buyer-card strong {
  display: block;
  margin-bottom: 9px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 500;
}

.buyer-card span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.process-card {
  position: relative;
  min-height: 210px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 45px rgba(31,67,92,.04);
}

.process-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--pink));
}

.process-card small {
  display: block;
  margin-bottom: 16px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
}

.process-card strong {
  display: block;
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 19px;
  line-height: 1.35;
  font-weight: 500;
}

.process-card span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.inquiry-box {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 45px rgba(31,67,92,.045);
}

.inquiry-list {
  display: grid;
  gap: 12px;
}

.inquiry-list li {
  list-style: none;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  line-height: 1.7;
  background: #fbfdfe;
}

.contact-form-grid {
  display: grid;
  grid-template-columns: minmax(0, .75fr) minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.contact-info-list {
  display: grid;
  gap: 14px;
}

.contact-info-card,
.form-panel {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 45px rgba(31,67,92,.045);
}

.contact-info-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 500;
}

.contact-info-card a,
.contact-info-card span {
  color: var(--blue);
  font-size: 16px;
  line-height: 1.7;
}

.contact-info-card p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.form-row {
  margin-bottom: 16px;
}

.form-row label {
  display: block;
  margin-bottom: 8px;
  color: #40535f;
  font-size: 14px;
  font-weight: 600;
}

.form-row input,
.form-row textarea {
  width: 100%;
  border: 1px solid #dce8ef;
  border-radius: 8px;
  padding: 13px 14px;
  color: var(--ink);
  font: inherit;
  outline: none;
}

.form-row input:focus,
.form-row textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(45,129,189,.12);
}

.form-row textarea {
  min-height: 150px;
  resize: vertical;
}

.form-tip {
  display: none;
  margin-top: 12px;
  color: var(--blue);
  font-size: 14px;
  line-height: 1.6;
}

.factory-gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.factory-shot {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 45px rgba(31,67,92,.04);
}

.factory-shot img {
  width: 100%;
  height: 210px;
  object-fit: cover;
}

.factory-shot div {
  padding: 18px;
}

.factory-shot strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 500;
}

.factory-shot span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  padding: 28px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1fr);
  gap: 52px;
  align-items: center;
}

.split img {
  width: 100%;
  aspect-ratio: 1.45 / 1;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.split-list {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.split-list li {
  list-style: none;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  line-height: 1.7;
}

.split-list strong {
  display: block;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 4px;
}

.oem {
  color: #fff;
  background: linear-gradient(135deg, #172028, #223744);
}

.oem .eyebrow,
.oem p {
  color: #b7c7d1;
}

.oem h2 {
  color: #fff;
}

.oem-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.oem-grid span {
  padding: 18px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 8px;
  color: #e8f0f4;
  background: rgba(255,255,255,.05);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.faq-item {
  padding: 24px;
}

.faq-item h3 {
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 500;
}

.geo-summary-en {
  padding: 46px 6vw;
  background: #f8fbfc;
  border-top: 1px solid var(--line);
}

.geo-summary-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.geo-summary-item {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.geo-summary-item strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.4;
  font-weight: 600;
}

.geo-summary-item p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
}

.contact-band {
  padding: 76px 6vw;
  background: #fff;
}

.contact-card {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
}

.contact-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.footer {
  background: var(--footer);
  color: #aebbc3;
  padding: 54px 6vw 28px;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto 38px;
  display: grid;
  grid-template-columns: minmax(220px, .95fr) repeat(4, minmax(130px, 1fr));
  gap: 30px;
}

.footer-brand img {
  width: 250px;
  max-height: 145px;
  object-fit: contain;
  object-position: left center;
  margin-bottom: 16px;
}

.footer-brand p,
.copyright {
  color: #95a4ad;
  font-size: 14px;
  line-height: 1.8;
}

.footer h4 {
  margin-bottom: 18px;
  color: #fff;
  font-size: 16px;
}

.footer li {
  list-style: none;
  margin-bottom: 12px;
}

.footer a {
  color: #aebbc3;
  font-size: 14px;
}

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

.copyright {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,.08);
  text-align: center;
}

@media (max-width: 980px) {
  .main-nav {
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 18px 18px;
    background: rgba(255, 255, 255, .98);
    border-top: 1px solid var(--line);
    box-shadow: 0 18px 36px rgba(31, 67, 92, .12);
    max-height: calc(100vh - 66px);
    overflow: auto;
  }

  body.nav-open .main-nav {
    display: flex;
  }

  .main-nav a {
    padding: 14px 4px;
    border-bottom: 1px solid #edf3f6;
    font-size: 16px;
  }

  .main-nav .lang-link {
    margin-top: 10px;
    justify-content: center;
    text-align: center;
    border: 1px solid var(--line);
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .hero {
    min-height: 640px;
  }

  .section-head,
  .split,
  .product-family,
  .inquiry-box,
  .contact-form-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .category-grid,
  .feature-grid,
  .faq-grid,
  .buyer-grid,
  .process-grid,
  .factory-gallery,
  .geo-summary-grid,
  .oem-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  body {
    padding-bottom: 76px;
  }

  .site-header {
    height: 66px;
    padding: 0 18px;
  }

  .logo img {
    height: 38px;
  }

  .hero {
    min-height: auto;
    padding: 96px 18px 34px;
  }

  .sub-hero {
    min-height: auto;
    padding: 96px 18px 42px;
  }

  .hero::before,
  .sub-hero::before {
    background: linear-gradient(180deg, rgba(255,255,255,.96) 0%, rgba(255,255,255,.9) 58%, rgba(255,255,255,.64) 100%);
  }

  .hero img,
  .sub-hero img {
    object-fit: contain;
    object-position: center top;
    opacity: .42;
  }

  .hero-content,
  .sub-hero-content {
    max-width: none;
  }

  .hero h1 {
    font-size: 34px;
    line-height: 1.08;
  }

  .sub-hero h1 {
    font-size: 34px;
    line-height: 1.12;
  }

  .hero p,
  .sub-hero p,
  .section-head p,
  .lead {
    font-size: 16px;
    line-height: 1.65;
  }

  .hero-actions {
    margin-top: 22px;
  }

  .trust-row {
    gap: 8px;
    margin-top: 20px;
  }

  .trust-row span {
    font-size: 12px;
    padding: 6px 9px;
  }

  .section,
  .contact-band {
    padding: 44px 18px;
  }

  .section-head {
    gap: 14px;
    margin-bottom: 24px;
  }

  .section h2 {
    font-size: 30px;
    line-height: 1.16;
  }

  .category-grid,
  .feature-grid,
  .faq-grid,
  .buyer-grid,
  .process-grid,
  .factory-gallery,
  .geo-summary-grid,
  .oem-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 22px;
  }

  .category-card,
  .feature-card,
  .faq-item {
    padding: 18px;
  }

  .category-card img {
    height: 150px;
  }

  .category-card p,
  .feature-card p,
  .faq-item p {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .split img,
  .product-family img {
    max-height: 240px;
    object-fit: contain;
    background: #fff;
  }

  .footer {
    padding-bottom: 96px;
  }
}

.service {
  position: fixed;
  right: 28px;
  bottom: 42px;
  z-index: 9999;
  pointer-events: auto;
}

.service-box {
  width: 118px;
  padding: 8px;
  border-radius: 18px;
  background: rgba(255, 255, 255, .82);
  border: 1px solid rgba(210, 226, 235, .78);
  box-shadow: 0 22px 58px rgba(31, 67, 92, .13);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.service-box p {
  margin: 0 0 4px;
  text-align: center;
  color: var(--muted);
  font-size: 11px;
}

.service-box a {
  display: block;
  min-height: 36px;
  line-height: 36px;
  padding: 0 12px;
  border-radius: 12px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  transition: background .2s ease, color .2s ease, transform .2s ease;
}

.service-box a:hover {
  background: rgba(45, 129, 189, .1);
  color: var(--blue);
  transform: translateY(-1px);
}

@media (max-width: 620px) {
  .service {
    right: 14px;
    left: 14px;
    bottom: 14px;
  }

  .service-box {
    width: auto;
    max-width: 360px;
    margin: 0 auto;
    padding: 6px;
    border-radius: 999px;
    flex-direction: row;
    justify-content: center;
  }

  .service-box p {
    display: none;
  }

  .service-box a {
    min-height: 34px;
    line-height: 34px;
    padding: 0 13px;
    border-radius: 999px;
    font-size: 12px;
  }
}