:root {
  --blue: #1f7fe5;
  --blue-deep: #0c4d8f;
  --red: #f12622;
  --red-deep: #b91512;
  --ink: #152033;
  --muted: #627086;
  --line: #dfe7f1;
  --pale: #f5f8fb;
  --white: #ffffff;
  --accent: #21a67a;
  --shadow: 0 20px 50px rgba(21, 32, 51, 0.14);
  --shadow-strong: 0 32px 80px rgba(8, 24, 45, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  background: var(--white);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 76px;
  padding: 12px clamp(18px, 4vw, 64px);
  border-bottom: 1px solid rgba(223, 231, 241, 0.72);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(24px);
  box-shadow: 0 12px 34px rgba(21, 32, 51, 0.08);
}

.brand {
  display: flex;
  align-items: center;
  min-width: 178px;
}

.brand img {
  display: block;
  width: 178px;
  height: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  color: #334158;
  font-size: 14px;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.main-nav a {
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

select,
input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  color: var(--ink);
  font: inherit;
}

select {
  height: 42px;
  padding: 0 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--red);
  border-radius: 6px;
  background: var(--red);
  color: var(--white);
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}

.button:hover {
  background: var(--red-deep);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.92);
  color: var(--blue-deep);
  border-color: rgba(255, 255, 255, 0.9);
}

.button-small {
  min-height: 42px;
  padding: 0 14px;
  font-size: 14px;
}

.button-inline {
  margin-top: 12px;
}

.hero {
  position: relative;
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: end;
  overflow: hidden;
  background: #081827;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 42%;
  pointer-events: none;
  background: linear-gradient(0deg, rgba(8, 24, 39, 0.72), rgba(8, 24, 39, 0));
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 74% 38%, rgba(241, 38, 34, 0.2), rgba(241, 38, 34, 0) 28%),
    linear-gradient(90deg, rgba(7, 22, 38, 0.96), rgba(18, 65, 111, 0.74) 48%, rgba(9, 35, 61, 0.68)),
    url("assets/chongteng-building.jpg") center center / cover no-repeat;
  filter: saturate(1.02) contrast(1.04);
  transform: scale(1.05);
}

.hero-main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 460px);
  gap: clamp(28px, 5vw, 70px);
  align-items: end;
  width: 100%;
  padding: clamp(92px, 13vw, 180px) clamp(22px, 5vw, 72px) 70px;
}

.hero-content {
  position: relative;
  width: min(980px, 100%);
  color: var(--white);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #9ee6cf;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(54px, 7vw, 104px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 14px;
  font-size: 22px;
  line-height: 1.18;
  letter-spacing: 0;
}

.hero-copy {
  width: min(720px, 100%);
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.48;
}

.hero-subcopy {
  width: min(780px, 100%);
  color: rgba(255, 255, 255, 0.76);
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.6;
}

.hero-signature {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.hero-signature span {
  padding: 9px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

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

.hero-visual {
  position: relative;
  display: grid;
  gap: 14px;
  margin-bottom: 8px;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 34px -22px -24px 34px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  pointer-events: none;
}

.hero-visual-media {
  position: relative;
  min-height: 300px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 36px 90px rgba(0, 0, 0, 0.38);
}

.hero-visual-media img {
  width: 100%;
  height: 100%;
  min-height: 300px;
  display: block;
  object-fit: cover;
  filter: saturate(1.04) contrast(1.04);
}

.hero-visual-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 24, 39, 0), rgba(8, 24, 39, 0.52));
}

.hero-visual-media span {
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 1;
  padding: 9px 12px;
  border-left: 3px solid var(--red);
  background: rgba(8, 24, 39, 0.76);
  color: var(--white);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-visual-panel {
  display: grid;
  grid-template-columns: 1.1fr repeat(3, 0.72fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.18);
  color: var(--white);
  box-shadow: 0 22px 58px rgba(0, 0, 0, 0.25);
}

.hero-visual-panel strong,
.hero-visual-panel div {
  min-height: 92px;
  display: grid;
  align-content: center;
  padding: 16px;
  background: rgba(8, 24, 39, 0.72);
}

.hero-visual-panel strong {
  font-size: 15px;
  line-height: 1.35;
}

.hero-visual-panel span {
  font-size: 18px;
  font-weight: 900;
}

.hero-visual-panel small {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 11px;
  line-height: 1.3;
}

.premium-capability-band {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 1px;
  overflow-x: auto;
  padding: 0 clamp(22px, 5vw, 72px) 18px;
  scrollbar-width: thin;
}

.premium-capability-band span {
  flex: 0 0 auto;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-strip {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
  color: var(--white);
}

.hero-strip span {
  min-height: 76px;
  display: flex;
  align-items: center;
  padding: 18px clamp(16px, 3vw, 34px);
  background: rgba(6, 34, 63, 0.58);
  font-weight: 700;
}

.cinematic-proof {
  position: relative;
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(380px, 1.28fr);
  gap: clamp(32px, 6vw, 86px);
  align-items: center;
  background: #081827;
  color: var(--white);
  overflow: hidden;
}

.cinematic-proof::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.42;
}

.cinematic-proof > * {
  position: relative;
}

.cinematic-copy p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 18px;
  line-height: 1.7;
}

.cinematic-grid {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  grid-template-rows: 250px 250px;
  gap: 14px;
}

.cinematic-grid figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  background: #10263d;
  box-shadow: var(--shadow-strong);
}

.cinematic-grid img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  filter: saturate(1.04) contrast(1.03);
  transition: transform 700ms ease;
}

.cinematic-grid figure:hover img {
  transform: scale(1.04);
}

.cinematic-large {
  grid-row: span 2;
}

.cinematic-grid figcaption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  padding: 10px 12px;
  border-left: 3px solid var(--red);
  background: rgba(8, 24, 39, 0.72);
  color: var(--white);
  font-size: 13px;
  font-weight: 800;
}

section {
  padding: clamp(70px, 9vw, 120px) clamp(20px, 5vw, 72px);
}

.position-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(360px, 1.28fr);
  gap: clamp(32px, 6vw, 76px);
  align-items: start;
  background: #ffffff;
}

.position-grid {
  display: grid;
  gap: 14px;
}

.position-grid article {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 8px 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--pale);
}

.position-grid span {
  grid-row: span 2;
  color: var(--accent);
  font-weight: 800;
}

.position-grid h3 {
  margin-bottom: 0;
}

.position-grid p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.6;
}

.buyer-value-section {
  background:
    linear-gradient(135deg, rgba(241, 38, 34, 0.12), rgba(241, 38, 34, 0) 42%),
    #10263d;
  color: var(--white);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms ease, transform 700ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.buyer-value-section .section-head {
  margin-bottom: 34px;
}

.buyer-value-section .text-link {
  color: #9ee6cf;
}

.buyer-value-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.buyer-value-grid article {
  min-height: 230px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.buyer-value-grid strong {
  margin-bottom: 12px;
  font-size: 21px;
}

.buyer-value-grid p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.6;
}

.gift-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(32px, 6vw, 76px);
  align-items: center;
  background: var(--white);
}

.gift-copy p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}

.gift-grid {
  display: grid;
  gap: 12px;
}

.gift-grid article {
  display: grid;
  gap: 8px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--pale);
}

.gift-grid strong {
  font-size: 21px;
}

.gift-grid span {
  color: var(--muted);
  line-height: 1.6;
}

.faq-section {
  background: var(--pale);
}

.faq-section h2 {
  width: min(920px, 100%);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.faq-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.faq-grid h3 {
  font-size: 21px;
}

.faq-grid p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.62;
}

.market-hero {
  min-height: 620px;
  display: grid;
  align-content: end;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(9, 38, 72, 0.96), rgba(16, 79, 140, 0.82) 54%, rgba(12, 45, 80, 0.7)),
    url("assets/chongteng-building.jpg") center center / cover no-repeat;
}

.market-hero .section-kicker {
  color: #9ee6cf;
}

.intro-section,
.solutions-section,
.rfq-section {
  background: var(--pale);
}

.intro-grid,
.rfq-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(34px, 7vw, 90px);
  align-items: start;
}

.building-photo {
  width: 100%;
  margin-top: 24px;
  border-radius: 8px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.production-section {
  display: grid;
  grid-template-columns: minmax(340px, 1.12fr) minmax(280px, 0.88fr);
  gap: clamp(30px, 6vw, 76px);
  align-items: center;
}

.production-media img {
  width: 100%;
  min-height: 430px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.production-copy p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}

.production-points {
  display: grid;
  gap: 10px;
  margin-top: 26px;
}

.production-points span {
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--pale);
  color: #34445a;
  font-weight: 700;
}

.rich-copy p,
.oem-content p,
.proof-copy p,
.rfq-section p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.text-link {
  color: var(--blue-deep);
  font-weight: 800;
}

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

.product-card {
  min-height: 310px;
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 32px rgba(21, 32, 51, 0.06);
  transition: transform 260ms ease, box-shadow 260ms ease, border-color 260ms ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(241, 38, 34, 0.32);
  box-shadow: var(--shadow);
}

.product-card p {
  color: var(--muted);
  line-height: 1.62;
}

.product-card a {
  margin-top: auto;
  color: var(--blue);
  font-weight: 800;
}

.product-code {
  margin-bottom: 34px;
  color: var(--accent);
  font-weight: 800;
}

.gate-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(34px, 7vw, 80px);
  align-items: center;
  background:
    linear-gradient(115deg, rgba(8, 24, 39, 0.96), rgba(16, 38, 61, 0.92)),
    url("assets/chongteng-production-line.jpg") center center / cover no-repeat;
  color: var(--white);
}

.gate-section h2 {
  width: min(760px, 100%);
}

.gate-section p {
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
  line-height: 1.72;
}

.gate-steps {
  display: grid;
  gap: 12px;
}

.gate-steps div {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 8px 18px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.gate-steps span {
  grid-row: span 2;
  color: #9ee6cf;
  font-weight: 800;
}

.gate-steps strong {
  font-size: 19px;
}

.gate-steps p {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.55;
}

.solutions-section h2 {
  width: min(980px, 100%);
}

.solution-list {
  margin-top: 34px;
  border-top: 1px solid var(--line);
}

.solution-list div {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

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

.support-section {
  background:
    linear-gradient(180deg, #ffffff, #f5f8fb);
}

.support-timeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.support-timeline article {
  min-height: 270px;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 14px 36px rgba(21, 32, 51, 0.08);
}

.support-timeline span {
  margin-bottom: auto;
  color: var(--accent);
  font-weight: 800;
}

.support-timeline strong {
  margin: 34px 0 10px;
  font-size: 19px;
  line-height: 1.2;
}

.support-timeline p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.oem-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1fr);
  gap: clamp(34px, 7vw, 80px);
  align-items: center;
  background: #ffffff;
}

.oem-flow {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}

.oem-flow span {
  min-height: 54px;
  display: flex;
  align-items: center;
  padding: 12px 14px;
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--pale);
  color: #34445a;
  font-weight: 800;
}

.capability-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 26px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(241, 38, 34, 0.14), rgba(241, 38, 34, 0) 40%),
    #10263d;
  box-shadow: var(--shadow-strong);
}

.capability-panel span {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
  color: var(--white);
  font-weight: 800;
  text-align: center;
}

.certificate-section {
  background:
    linear-gradient(135deg, rgba(31, 127, 229, 0.08), rgba(31, 127, 229, 0) 36%),
    var(--pale);
}

.certificate-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(360px, 1.18fr);
  gap: clamp(20px, 4vw, 46px);
  align-items: stretch;
}

.certificate-summary,
.certificate-table {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 18px 46px rgba(21, 32, 51, 0.08);
}

.certificate-summary {
  display: grid;
  align-content: end;
  min-height: 330px;
  padding: clamp(24px, 4vw, 34px);
  background:
    linear-gradient(145deg, rgba(8, 24, 39, 0.86), rgba(16, 38, 61, 0.76)),
    url("assets/chongteng-company-poster.png") center top / cover no-repeat;
  color: var(--white);
}

.certificate-summary strong {
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.02;
}

.certificate-summary p {
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 17px;
  line-height: 1.65;
}

.certificate-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.certificate-badges span {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 13px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 900;
}

.certificate-table {
  display: grid;
  overflow: hidden;
}

.certificate-table div {
  display: grid;
  grid-template-columns: minmax(160px, 0.52fr) minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  min-height: 86px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}

.certificate-table div:last-child {
  border-bottom: 0;
}

.certificate-table strong {
  color: var(--ink);
  font-size: 19px;
}

.certificate-table span {
  color: var(--muted);
  line-height: 1.55;
}

.proof-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.66fr) minmax(320px, 1.34fr);
  gap: clamp(28px, 5vw, 60px);
  align-items: center;
  background: #f9fbfe;
}

.proof-gallery {
  display: grid;
  grid-template-columns: 0.85fr 0.85fr 1.15fr;
  gap: 14px;
  align-items: stretch;
}

.proof-gallery img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  border: 1px solid var(--line);
  border-radius: 8px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.proof-gallery img:nth-child(2) {
  object-position: center center;
}

.proof-gallery img:nth-child(3) {
  object-position: center top;
}

.contact-block {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.contact-block p {
  margin-bottom: 8px;
  font-size: 16px;
}

.contact-block a {
  color: var(--blue-deep);
}

.rfq-form {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.rfq-form label {
  display: grid;
  gap: 7px;
  color: #35445c;
  font-weight: 700;
}

.rfq-form input,
.rfq-form select,
.rfq-form textarea {
  padding: 12px;
}

.partner-hero {
  position: relative;
  min-height: 520px;
  display: grid;
  align-content: end;
  padding-top: 130px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(9, 38, 72, 0.96), rgba(16, 79, 140, 0.88) 54%, rgba(12, 45, 80, 0.7)),
    url("assets/chongteng-building.jpg") center center / cover no-repeat;
}

.partner-hero .section-kicker {
  color: #9ee6cf;
}

.catalog-hero {
  min-height: 520px;
  display: grid;
  align-content: end;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(9, 38, 72, 0.96), rgba(16, 79, 140, 0.86) 54%, rgba(12, 45, 80, 0.7)),
    url("assets/chongteng-production-line.jpg") center center / cover no-repeat;
}

.catalog-hero .section-kicker {
  color: #9ee6cf;
}

.catalog-section {
  background: var(--pale);
}

.catalog-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  margin-bottom: 28px;
}

.catalog-toolbar p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.catalog-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.catalog-controls {
  display: grid;
  gap: 10px;
  justify-items: end;
}

.catalog-controls input {
  width: min(360px, 100%);
  height: 42px;
  padding: 0 14px;
}

.catalog-filters button {
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.catalog-filters button.is-active,
.catalog-filters button:hover {
  border-color: var(--blue);
  background: var(--blue);
  color: var(--white);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.catalog-card {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  min-height: 208px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
}

.catalog-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #10263d;
  color: #9ee6cf;
  font-size: 24px;
  font-weight: 800;
}

.catalog-card-body {
  display: flex;
  flex-direction: column;
  padding: 18px;
}

.catalog-card-body span {
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.catalog-card-body h3 {
  font-size: 19px;
  line-height: 1.2;
}

.catalog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 12px;
}

.catalog-tags span {
  margin: 0;
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--pale);
  color: #34445a;
  font-size: 11px;
  text-transform: none;
}

.catalog-card-body p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.catalog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
}

.catalog-card-footer small {
  color: var(--muted);
  font-weight: 800;
}

.catalog-card-footer a {
  color: var(--blue);
  font-weight: 800;
}

.partner-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(340px, 1.22fr);
  gap: clamp(30px, 6vw, 76px);
  align-items: start;
  background: var(--pale);
}

.review-panel {
  position: sticky;
  top: 110px;
}

.review-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.review-list p {
  margin: 0;
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--white);
  color: var(--muted);
  line-height: 1.55;
}

.showroom-card {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 30px rgba(21, 32, 51, 0.08);
}

.showroom-card img {
  width: 96px;
  height: 96px;
  border-radius: 6px;
  object-fit: cover;
}

.showroom-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
}

.showroom-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.partner-form {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.partner-form label:last-of-type,
.partner-form button {
  grid-column: 1 / -1;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 30px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer div {
  display: grid;
  gap: 4px;
}

body.is-rtl {
  direction: rtl;
}

body.is-rtl .hero-bg {
  transform: scale(1.02);
}

.legal-page,
.thank-you-page {
  max-width: 880px;
  margin: 0 auto;
  padding-top: 120px;
}

.legal-page p,
.thank-you-page p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}

.legal-page h2 {
  margin-top: 36px;
  font-size: 28px;
}

.thank-you-page {
  min-height: 100vh;
  display: grid;
  align-content: center;
}

.thank-you-page img {
  width: 220px;
  margin-bottom: 42px;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .main-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero-strip,
  .hero-main,
  .cinematic-proof,
  .cinematic-grid,
  .product-grid,
  .position-section,
  .buyer-value-grid,
  .gift-section,
  .faq-grid,
  .support-timeline,
  .intro-grid,
  .production-section,
  .oem-section,
  .proof-section,
  .proof-gallery,
  .certificate-layout,
  .rfq-section,
  .catalog-toolbar,
  .gate-section,
  .partner-section {
    grid-template-columns: 1fr;
  }

  .catalog-filters {
    justify-content: flex-start;
  }

  .catalog-controls {
    justify-items: start;
  }

  .catalog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .review-panel {
    position: static;
  }

  .support-timeline article {
    min-height: auto;
  }

  .support-timeline span {
    margin-bottom: 26px;
  }

  .support-timeline strong {
    margin-top: 0;
  }

  .hero-content {
    padding-bottom: 0;
  }

  .hero-main {
    padding-bottom: 42px;
  }

  .hero-visual {
    width: min(620px, 100%);
  }

  .hero-visual-panel {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-visual-panel strong {
    grid-column: 1 / -1;
    min-height: auto;
  }

  .cinematic-grid {
    grid-template-rows: none;
  }

  .cinematic-large {
    grid-row: auto;
  }

  .hero-strip span {
    min-height: 64px;
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: auto;
    gap: 16px;
  }

  .brand {
    min-width: 150px;
  }

  .brand img {
    width: 150px;
  }

  .header-actions {
    width: 100%;
  }

  .header-actions select {
    flex: 1;
  }

  .button-small {
    flex: 1;
  }

  .hero {
    min-height: 760px;
  }

  h1 {
    font-size: clamp(44px, 13vw, 64px);
  }

  .hero-main {
    padding-top: 74px;
  }

  .hero-actions .button {
    width: 100%;
  }

  .hero-visual-media,
  .hero-visual-media img {
    min-height: 220px;
  }

  .hero-visual-panel {
    grid-template-columns: 1fr;
  }

  .hero-visual::before {
    display: none;
  }

  .premium-capability-band {
    padding-bottom: 12px;
  }

  .hero-strip {
    grid-template-columns: 1fr;
  }

  .section-head,
  .site-footer {
    display: grid;
  }

  .solution-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .capability-panel {
    grid-template-columns: repeat(2, 1fr);
    padding: 16px;
  }

  .oem-flow {
    grid-template-columns: 1fr;
  }

  .partner-form {
    grid-template-columns: 1fr;
  }

  .gate-steps div {
    grid-template-columns: 1fr;
  }

  .position-grid article {
    grid-template-columns: 1fr;
  }

  .gate-steps span {
    grid-row: auto;
  }

  .showroom-card {
    grid-template-columns: 84px minmax(0, 1fr);
  }

  .showroom-card img {
    width: 84px;
    height: 84px;
  }

  .support-timeline article {
    min-height: auto;
  }

  .support-timeline span {
    margin-bottom: 26px;
  }

  .support-timeline strong {
    margin-top: 0;
  }

  .catalog-grid,
  .catalog-card {
    grid-template-columns: 1fr;
  }

  .certificate-table div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .catalog-thumb {
    min-height: 76px;
  }
}