:root {
  --green: #008f48;
  --green-dark: #006b38;
  --accent: #f5a400;
  --ink: #17211c;
  --muted: #63706a;
  --line: #dbe5df;
  --paper: #f7faf8;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-logo {
  width: 118px;
  height: 46px;
  object-fit: contain;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
}

.nav-links a:hover,
.nav-links .active {
  color: var(--green-dark);
}

.hero {
  min-height: 82vh;
  display: grid;
  align-items: center;
  background:
    linear-gradient(90deg, rgba(10, 24, 17, 0.82), rgba(10, 24, 17, 0.18)),
    url("assets/factory-gate.png");
  background-size: cover;
  background-position: center;
  color: var(--white);
}

.hero-inner,
.section-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.hero-copy {
  max-width: 680px;
  padding: 72px 0;
}

.eyebrow {
  color: var(--green);
  font-weight: 700;
  letter-spacing: 0;
  margin: 0 0 10px;
}

.hero .eyebrow {
  color: #9ee7bd;
}

h1,
h2,
h3 {
  line-height: 1.16;
  margin: 0;
}

h1 {
  font-size: clamp(40px, 7vw, 76px);
  max-width: 760px;
}

h2 {
  font-size: 34px;
}

h3 {
  font-size: 20px;
}

.lead {
  margin: 22px 0 0;
  max-width: 720px;
  font-size: 18px;
  color: #e7f1eb;
}

.section {
  padding: 78px 0;
}

.section.alt {
  background: var(--paper);
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head p,
.muted {
  color: var(--muted);
}

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

.stat {
  padding: 26px 20px;
  border-right: 1px solid var(--line);
}

.stat:last-child {
  border-right: 0;
}

.stat strong {
  display: block;
  font-size: 32px;
  color: var(--green-dark);
}

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

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

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

.item p {
  color: var(--muted);
  margin-bottom: 0;
}

.image-band {
  min-height: 360px;
  background:
    linear-gradient(rgba(8, 28, 18, 0.2), rgba(8, 28, 18, 0.2)),
    url("assets/factory-aerial.png");
  background-size: cover;
  background-position: center;
}

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

.photo-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
}

.photo-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: block;
  object-fit: cover;
}

.photo-card figcaption {
  padding: 14px 16px;
  color: var(--muted);
  font-size: 14px;
}

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

.certificate-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
}

.certificate-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: block;
  object-fit: contain;
  background: #fbfcfb;
  padding: 10px;
}

.certificate-card.portrait img {
  aspect-ratio: 3 / 4;
}

.certificate-card figcaption {
  min-height: 74px;
  padding: 14px 16px;
  color: var(--muted);
  font-size: 14px;
}

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

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

.product-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: block;
  object-fit: cover;
  background: var(--paper);
}

.product-card .product-copy {
  padding: 16px;
}

.product-card h3 {
  font-size: 17px;
}

.product-card p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.lang-block {
  display: grid;
  gap: 12px;
}

.lang-block p {
  margin: 0;
}

.en {
  color: var(--muted);
}

.page-hero {
  padding: 90px 0 62px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  color: var(--ink);
}

.page-hero .lead {
  color: var(--muted);
}

.two-col {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: start;
}

.list {
  padding-left: 20px;
  color: var(--muted);
}

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

.process-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.step-number {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--green);
  color: var(--green-dark);
  border-radius: 50%;
  font-weight: 700;
}

.product-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.product-table th,
.product-table td {
  text-align: left;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.product-table th {
  color: var(--green-dark);
  background: var(--paper);
}

.contact-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  background: var(--white);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 6px;
  background: var(--green);
  color: var(--white);
  margin-top: 28px;
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 34px 0;
  color: var(--muted);
  background: var(--white);
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

@media (max-width: 820px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px 18px;
  }

  .hero {
    min-height: 720px;
  }

  .stats,
  .grid,
  .grid.two,
  .photo-grid,
  .certificate-grid,
  .product-grid,
  .two-col {
    grid-template-columns: 1fr;
  }

  .stat {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .footer-inner {
    flex-direction: column;
  }
}