:root {
  --font-sans: "Alibaba PuHuiTi 3", "Alibaba PuHuiTi 2.0", "Alibaba PuHuiTi", "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, Helvetica, sans-serif;
}

@font-face {
  font-family: "Alibaba PuHuiTi 3";
  src: url("assets/fonts/AlibabaPuHuiTi-3-55-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Alibaba PuHuiTi 3";
  src: url("assets/fonts/AlibabaPuHuiTi-3-75-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Alibaba PuHuiTi 3";
  src: url("assets/fonts/AlibabaPuHuiTi-3-85-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Alibaba PuHuiTi 3";
  src: url("assets/fonts/AlibabaPuHuiTi-3-95-ExtraBold.woff2") format("woff2");
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7f4;
  --bg-muted: #eef3ed;
  --surface: #ffffff;
  --ink: #122018;
  --ink-strong: #07130d;
  --muted: #5f6c62;
  --line: #dce4dc;
  --accent: #155334;
  --accent-2: #287047;
  --accent-soft: #dcecdf;
  --charcoal: #202624;
  --shadow: 0 22px 60px rgba(18, 32, 24, 0.12);
  --radius: 8px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  letter-spacing: 0;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
  letter-spacing: 0;
}

.site-header {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 96px;
  padding: 0 clamp(44px, 4.5vw, 88px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(220, 228, 220, 0.7);
  backdrop-filter: blur(18px);
  transition: box-shadow 180ms ease, min-height 180ms ease;
}

.site-header.is-scrolled {
  min-height: 82px;
  box-shadow: 0 12px 40px rgba(18, 32, 24, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--ink-strong);
  font-size: 30px;
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
}

.brand-mark svg {
  width: 30px;
  height: 30px;
  fill: currentColor;
}

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  gap: clamp(32px, 3vw, 54px);
  color: #161f1a;
  font-size: 18px;
  font-weight: 600;
}

.desktop-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 100%;
  line-height: 1;
}

.desktop-nav a,
.site-footer nav a {
  transition: color 160ms ease;
}

.desktop-nav a.is-active {
  color: var(--accent);
}

.desktop-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 22px;
  height: 3px;
  background: var(--accent);
}

.desktop-nav a:hover,
.site-footer nav a:hover {
  color: var(--accent);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 7px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.mobile-nav {
  position: fixed;
  z-index: 25;
  inset: 76px 16px auto 16px;
  display: none;
  flex-direction: column;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.mobile-nav a {
  padding: 14px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-weight: 700;
}

.mobile-nav a:last-child {
  border-bottom: 0;
}

.mobile-nav.is-open {
  display: flex;
}

.section,
.hero {
  scroll-margin-top: 96px;
}

.section-inner {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  min-height: 760px;
  padding: 170px 0 34px;
  background: #fff;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(520px, 1.05fr);
  align-items: center;
  gap: clamp(48px, 6vw, 92px);
}

.hero-copy h1 {
  max-width: 650px;
  margin: 0;
  color: var(--ink-strong);
  font-size: clamp(48px, 5vw, 72px);
  line-height: 1.12;
  font-weight: 800;
}

.hero-copy p {
  max-width: 590px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: nowrap;
  gap: 16px;
  margin-top: 44px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  gap: 18px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--accent);
  color: #fff;
}

.button.primary:hover {
  background: var(--accent-2);
}

.button.secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}

.button.secondary:hover {
  border-color: var(--accent);
}

.hero-media {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  transform: translateY(-26px);
}

.hero-media::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 9% 2% 3% 16%;
  border-radius: var(--radius);
  background: var(--accent-soft);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 1.18;
  object-fit: cover;
  transform: scale(1.12);
  border-radius: var(--radius);
  box-shadow: none;
}

.section {
  padding: 104px 0;
}

.section-heading {
  margin-bottom: 44px;
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.65fr);
  gap: 40px;
  align-items: end;
}

.centered {
  max-width: 760px;
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-heading h2,
.oem-copy h2,
.factory-copy h2 {
  margin: 0;
  color: var(--ink-strong);
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.06;
  font-weight: 800;
}

.section-heading p,
.oem-copy p,
.factory-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.advantages-section {
  scroll-margin-top: 96px;
  padding: 66px 0 72px;
  background: #fff;
  border-top: 1px solid var(--line);
}

.advantages-heading {
  margin-bottom: 34px;
}

.advantages-heading h2 {
  font-size: clamp(34px, 4vw, 46px);
}

.advantages-heading p {
  max-width: 720px;
  margin: 16px auto 0;
  color: var(--muted);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  background: transparent;
  border: 0;
}

.advantage-item {
  min-height: 210px;
  padding: 12px 30px 0;
  background: transparent;
  text-align: center;
  border-right: 1px solid var(--line);
}

.advantage-item:last-child {
  border-right: 0;
}

.line-icon {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  margin: 0 auto 22px;
  border: 0;
  border-radius: 0;
  color: var(--accent);
}

.line-icon img {
  width: 64px;
  height: 64px;
  object-fit: contain;
}

.advantage-item h3,
.variant h3,
.factory-points h3,
.quality-flow h3,
.service-list h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 20px;
  line-height: 1.25;
}

.advantage-item p,
.variant p,
.factory-points p,
.quality-flow p,
.service-list p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.variant,
.rfq-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.product-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.variant {
  padding: 0 0 20px;
  text-align: center;
  overflow: hidden;
}

.variant-image {
  display: grid;
  place-items: center;
  width: 100%;
  height: 252px;
  margin-bottom: 22px;
  border-radius: 7px;
  border-bottom: 0;
  background: #fff;
  overflow: hidden;
}

.variant-image img {
  width: 100%;
  height: 100%;
  object-fit: fill;
}

.variant h3,
.variant p {
  padding: 0 18px;
}

.oem-section,
.quality-section {
  background: var(--bg-soft);
}

.oem-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(420px, 1.22fr);
  gap: 72px;
  align-items: start;
}

.oem-copy p {
  margin-top: 24px;
}

.text-link {
  display: inline-flex;
  margin-top: 28px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 800;
  border-bottom: 2px solid currentColor;
}

.oem-table {
  border-top: 1px solid var(--line);
}

.oem-table div {
  display: grid;
  grid-template-columns: 145px 1fr;
  gap: 26px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.oem-table span {
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
}

.oem-table strong {
  color: var(--ink);
  font-size: 18px;
  line-height: 1.45;
}

.factory-grid {
  display: grid;
  grid-template-columns: 0.72fr 1.32fr 1.1fr;
  gap: 34px;
  align-items: start;
}

.factory-gallery {
  display: grid;
  gap: 26px;
}

.factory-gallery img,
.factory-feature img {
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.factory-feature,
.factory-gallery figure {
  margin: 0;
}

.factory-feature img {
  aspect-ratio: 1.18;
}

.factory-gallery img {
  aspect-ratio: 1.78;
}

figcaption {
  margin-top: 10px;
  color: var(--ink);
  font-size: 15px;
  text-align: center;
}

.factory-copy p {
  margin-top: 24px;
}

.factory-points {
  display: grid;
  gap: 22px;
  margin-top: 36px;
}

.factory-points div {
  padding-left: 20px;
  border-left: 3px solid var(--accent);
}

.quality-flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: 0;
  background: transparent;
  gap: 28px;
}

.quality-flow article {
  position: relative;
  min-height: 0;
  padding: 0;
  background: transparent;
  text-align: left;
}

.quality-flow article:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 70px;
  right: -24px;
  width: 26px;
  height: 2px;
  background: var(--accent);
}

.quality-flow article:not(:last-child)::before {
  content: "";
  position: absolute;
  top: 65px;
  right: -27px;
  border-left: 10px solid var(--accent);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
}

.process-thumb {
  width: 144px;
  height: 144px;
  margin: 0 auto 18px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  padding: 5px;
  background: #fff;
  overflow: hidden;
}

.process-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.quality-flow span {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin: 0 8px 12px 0;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.quality-flow h3 {
  display: inline;
  font-size: 18px;
}

.export-section {
  background: #fff;
  color: var(--ink);
}

.export-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(460px, 0.94fr);
  gap: 62px;
  align-items: start;
}

.export-copy h2,
.rfq-panel h2 {
  margin: 0;
  color: var(--accent);
  font-size: clamp(38px, 4.5vw, 56px);
  line-height: 1.08;
  font-weight: 800;
}

.export-copy p,
.rfq-panel p {
  margin: 18px 0 0;
  color: #3f4d45;
  font-size: 17px;
  line-height: 1.55;
}

.buyer-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 28px;
}

.buyer-list span {
  min-height: 104px;
  padding: 58px 18px 0 0;
  border-right: 1px solid var(--line);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.2;
  font-weight: 800;
}

.export-support-title {
  margin: 38px 0 20px;
  color: var(--accent);
  font-size: 24px;
}

.service-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: transparent;
  border: 0;
}

.service-list div {
  padding: 0 18px 0 0;
  border-right: 1px solid var(--line);
  background: transparent;
}

.service-list h3 {
  color: var(--ink);
  font-size: 16px;
}

.service-list p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.export-photo {
  display: grid;
  grid-template-columns: 0.38fr 0.62fr;
  align-items: end;
  margin-top: 34px;
  overflow: hidden;
}

.export-photo img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.export-photo img:first-child {
  object-position: center;
}

.export-photo img:last-child {
  object-position: center;
}

.rfq-panel {
  padding: 40px 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 16px 50px rgba(18, 32, 24, 0.08);
}

.rfq-form {
  display: grid;
  gap: 16px;
  margin-top: 26px;
  padding: 0;
  border: 0;
  box-shadow: none;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

label {
  display: grid;
  grid-template-columns: 145px 1fr;
  gap: 8px;
  align-items: center;
}

label span {
  color: #314039;
  font-size: 13px;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  font-size: 15px;
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(21, 83, 52, 0.12);
}

.form-status {
  min-height: 22px;
  margin: 0;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

.site-footer {
  padding: 44px 0;
  background: linear-gradient(135deg, #123d28, #062516);
  border-top: 0;
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.95fr) minmax(220px, 0.7fr) minmax(420px, 1.2fr);
  gap: 44px;
  align-items: center;
}

.footer-brand {
  margin-bottom: 14px;
  color: #fff;
}

.site-footer p {
  max-width: 520px;
  margin: 0;
  color: #e4efe7;
  line-height: 1.6;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 18px;
  color: #eaf3ed;
  font-size: 14px;
  font-weight: 700;
}

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

.footer-contact a {
  display: grid;
  gap: 4px;
  color: #fff;
  font-weight: 700;
}

.footer-contact span {
  color: #cde3d4;
  font-size: 13px;
}

.footer-records {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  color: #c7d2cc;
  font-size: 14px;
  line-height: 16px;
}

.footer-records > span,
.footer-records a {
  display: inline-flex;
  align-items: center;
  min-height: 16px;
  line-height: 16px;
}

.footer-records a {
  color: #c7d2cc;
}

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

.footer-records img {
  display: block;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  object-fit: contain;
}

.copyright-mark {
  display: inline-flex;
  align-items: center;
  width: auto;
  height: 16px;
  color: #fff;
  font-size: 14px;
  line-height: 16px;
  font-weight: 700;
}

@media (max-width: 1060px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
  }

  .desktop-nav,
  .header-cta {
    display: none;
  }

  .menu-button {
    display: block;
    justify-self: end;
  }

  .hero-grid,
  .oem-grid,
  .factory-grid,
  .export-contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-media {
    grid-column: auto;
    grid-row: auto;
  }

  .hero {
    min-height: auto;
  }

  .hero-copy h1 {
    max-width: 880px;
  }

  .hero-media img {
    max-height: 620px;
  }

  .split-heading {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .advantages-grid,
  .quality-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .quality-flow article::before,
  .quality-flow article::after {
    display: none;
  }

  .buyer-list,
  .service-list,
  .footer-contact {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 68px;
    padding: 0 18px;
  }

  .brand {
    gap: 12px;
    font-size: 28px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .mobile-nav {
    inset: 68px 12px auto 12px;
  }

  .section-inner {
    width: min(100% - 28px, var(--container));
  }

  .hero {
    padding: 108px 0 44px;
  }

  .hero-grid {
    gap: 36px;
  }

  .hero-actions {
    flex-wrap: wrap;
  }

  .hero-actions .button {
    width: min(100%, 360px);
  }

  .hero-copy h1 {
    font-size: clamp(36px, 11vw, 48px);
    line-height: 1.06;
  }

  .hero-copy p {
    font-size: 16px;
    line-height: 1.62;
  }

  .advantages-grid,
  .quality-flow,
  .product-list,
  .field-row,
  .footer-grid,
  .buyer-list,
  .service-list,
  .footer-contact {
    grid-template-columns: 1fr;
  }

  label {
    grid-template-columns: 1fr;
  }

  .advantage-item,
  .quality-flow article {
    min-height: auto;
  }

  .section {
    padding: 72px 0;
  }

  .section-heading {
    margin-bottom: 32px;
  }

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

  .footer-grid {
    align-items: start;
  }

  .footer-records {
    flex-wrap: wrap;
    gap: 8px 10px;
  }

  .site-footer nav {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}