:root {
  --green: #009947;
  --green-dark: #04753b;
  --orange: #f08300;
  --ink: #1e2a27;
  --muted: #66736f;
  --line: #e4ece7;
  --soft: #f5f8f6;
  --deep: #14221d;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.6;
  background: var(--white);
}

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

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

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  color: #dcebe4;
  font-size: 14px;
  background: var(--deep);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 38px;
  gap: 16px;
}

.topbar-contact {
  display: flex;
  align-items: center;
  gap: 22px;
  white-space: nowrap;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  min-width: 250px;
  gap: 12px;
}

.brand img {
  width: 58px;
  height: 58px;
  object-fit: contain;
}

.brand strong {
  display: block;
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 0;
}

.brand span {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 28px 13px;
  color: #25322e;
  font-size: 15px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover {
  color: var(--green);
  background: #f0f7f3;
}

.nav-links a.active {
  color: var(--white);
  background: var(--green);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--white);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  background: var(--deep);
}

.hero-slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  background-position: center;
  background-size: cover;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

.hero-slide::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(9, 28, 20, 0.84), rgba(9, 28, 20, 0.48), rgba(9, 28, 20, 0.16));
}

.hero-slide.is-active {
  opacity: 1;
  visibility: visible;
}

.hero-content {
  position: relative;
  z-index: 1;
  color: var(--white);
}

.hero-content p {
  margin: 0 0 14px;
  color: #ccead9;
  font-size: 18px;
}

.hero-content h1,
.hero-content h2 {
  max-width: 760px;
  margin: 0;
  font-size: 48px;
  line-height: 1.18;
  letter-spacing: 0;
}

.hero-content span {
  display: block;
  max-width: 700px;
  margin-top: 18px;
  color: #e8f2ee;
  font-size: 18px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 126px;
  height: 44px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  font-weight: 700;
}

.btn.primary {
  border-color: var(--green);
  background: var(--green);
}

.btn.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.hero-dots {
  position: absolute;
  left: 50%;
  bottom: 28px;
  z-index: 2;
  display: flex;
  gap: 10px;
  transform: translateX(-50%);
}

.hero-dots button {
  width: 34px;
  height: 4px;
  padding: 0;
  border: 0;
  background: rgba(255, 255, 255, 0.58);
}

.hero-dots button.is-active {
  background: var(--orange);
}

.section {
  padding: 76px 0;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 36px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h2 {
  margin: 0 0 18px;
  font-size: 34px;
  line-height: 1.28;
  letter-spacing: 0;
}

.lead,
.section-heading p,
.intro-grid p,
.split p,
.contact-section p {
  color: var(--muted);
}

.intro-band {
  background: var(--soft);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 46px;
}

.stats-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.stats-panel div,
.equipment-strip div {
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
}

.stats-panel strong,
.equipment-strip strong {
  display: block;
  color: var(--green);
  font-size: 34px;
  line-height: 1.1;
}

.stats-panel span,
.equipment-strip span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  background: var(--white);
  border: 1px solid var(--line);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(16, 40, 30, 0.12);
}

.product-card img {
  width: 100%;
  aspect-ratio: 1 / 0.78;
  object-fit: cover;
  background: #eef4f1;
}

.product-card h3 {
  margin: 18px 18px 8px;
  font-size: 20px;
}

.product-card p {
  min-height: 74px;
  margin: 0 18px 20px;
  color: var(--muted);
  font-size: 14px;
}

.capability,
.certificates {
  background: var(--soft);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 46px;
}

.image-stack {
  display: grid;
  grid-template-columns: 1fr 0.75fr;
  align-items: end;
  gap: 16px;
}

.image-stack img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.image-stack img:nth-child(2) {
  height: 260px;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
}

.process-list span {
  padding: 14px 16px;
  color: var(--green-dark);
  font-weight: 700;
  background: var(--white);
  border-left: 4px solid var(--green);
}

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

.workshop-grid figure {
  position: relative;
  min-height: 230px;
  margin: 0;
  overflow: hidden;
  background: var(--soft);
}

.workshop-grid img {
  width: 100%;
  height: 100%;
  min-height: 230px;
  object-fit: cover;
  transition: transform 0.24s ease;
}

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

.workshop-grid figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  padding: 12px 16px;
  color: var(--white);
  font-weight: 700;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.72));
}

.equipment-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.partners {
  background: #fbfdfc;
}

.partner-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: center;
}

.partner-row img {
  width: 100%;
  height: 150px;
  padding: 28px;
  object-fit: contain;
  background: var(--white);
  border: 1px solid var(--line);
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.certificate-grid img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  object-position: top;
  background: var(--white);
  border: 1px solid var(--line);
}

.text-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--green);
  font-weight: 800;
}

.contact-section {
  padding: 72px 0;
  color: var(--white);
  background: linear-gradient(90deg, rgba(6, 61, 34, 0.94), rgba(12, 96, 50, 0.88)), url("assets/ppt/image48.jpeg") center / cover;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 42px;
  align-items: center;
}

.contact-section .eyebrow,
.contact-section p {
  color: #d7efe2;
}

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

.contact-card a,
.contact-card div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  padding: 18px 20px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
}

.contact-card strong {
  color: var(--green-dark);
}

.contact-card span {
  overflow-wrap: anywhere;
}

.site-footer {
  color: #c8d4cf;
  background: #0e1714;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 1.1fr;
  gap: 40px;
  padding: 48px 0;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
}

.footer-brand img {
  width: 54px;
  height: 54px;
  object-fit: contain;
  background: var(--white);
}

.site-footer h3 {
  margin: 0 0 14px;
  color: var(--white);
  font-size: 18px;
}

.site-footer a,
.site-footer p {
  display: block;
  margin: 6px 0;
}

.copyright {
  padding: 16px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.page-banner {
  padding: 82px 0;
  color: var(--white);
  background: linear-gradient(90deg, rgba(9, 34, 25, 0.86), rgba(7, 92, 46, 0.66)), url("assets/ppt/image95.jpeg") center / cover;
}

.page-banner p {
  margin: 0 0 8px;
  color: #cdebd9;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0;
}

.page-banner h1 {
  margin: 0;
  font-size: 42px;
  line-height: 1.2;
  letter-spacing: 0;
}

.page-banner span {
  display: block;
  margin-top: 12px;
  color: #e7f4ed;
  font-size: 17px;
}

.news-page {
  background: #f7faf8;
}

.news-list-section {
  padding: 64px 0 82px;
}

.news-shell {
  padding: 44px 54px 28px;
  background: var(--white);
  border: 1px solid var(--line);
}

.news-title-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.news-title-row h2 {
  margin-bottom: 0;
}

.news-title-row span {
  color: #8b9692;
  font-size: 14px;
  white-space: nowrap;
}

.news-tabs {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-bottom: 34px;
}

.news-tabs a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
  height: 38px;
  border: 1px solid #1f2a26;
  color: #17211d;
  font-size: 18px;
  font-weight: 700;
  background: var(--white);
}

.news-tabs a.active {
  border-color: var(--green);
  color: var(--white);
  background: var(--green);
}

.news-list {
  display: grid;
}

.news-item {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 120px;
  gap: 28px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px dotted #cfd8d3;
}

.news-thumb {
  display: block;
  overflow: hidden;
  background: var(--soft);
}

.news-thumb img {
  width: 100%;
  aspect-ratio: 1.58 / 1;
  object-fit: cover;
  transition: transform 0.24s ease;
}

.news-item:hover .news-thumb img {
  transform: scale(1.04);
}

.news-copy {
  min-width: 0;
}

.news-title {
  display: block;
  margin-top: 2px;
  color: #101b17;
  font-size: 23px;
  line-height: 1.45;
  transition: color 0.2s ease;
}

.news-title:hover {
  color: var(--green);
}

.news-copy p {
  max-width: 720px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.news-item time {
  color: #8b9692;
  font-size: 18px;
  text-align: right;
  white-space: nowrap;
}

.article-shell {
  margin-top: 56px;
  margin-bottom: 78px;
  padding: 42px 58px 54px;
  background: var(--white);
  border: 1px solid var(--line);
}

.article-shell h1 {
  max-width: 980px;
  margin: 0 auto 18px;
  color: #0d1713;
  font-size: 34px;
  line-height: 1.38;
  text-align: center;
  letter-spacing: 0;
}

.article-meta {
  margin-bottom: 34px;
  color: #8a9692;
  font-size: 15px;
  text-align: center;
}

.article-shell p {
  margin: 0 0 20px;
  color: #161f1b;
  font-size: 18px;
  line-height: 2;
  text-align: justify;
}

.article-shell img {
  width: min(860px, 100%);
  max-height: 520px;
  margin: 22px auto 26px;
  object-fit: cover;
}

.back-link {
  display: inline-flex;
  margin-top: 16px;
  color: var(--green);
  font-weight: 800;
}

@media (max-width: 980px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 8px 0;
  }

  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 82px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: var(--white);
    border-bottom: 1px solid var(--line);
  }

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

  .nav-links a {
    padding: 14px 24px;
    border-top: 1px solid var(--line);
  }

  .hero {
    min-height: 500px;
  }

  .hero-content h1,
  .hero-content h2 {
    font-size: 36px;
  }

  .intro-grid,
  .split,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .product-grid,
  .workshop-grid,
  .equipment-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .news-shell {
    padding: 32px 28px 18px;
  }

  .news-item {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 20px;
  }

  .news-item time {
    grid-column: 2;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 24px, 1180px);
  }

  .topbar-contact {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .brand {
    min-width: 0;
  }

  .brand img {
    width: 48px;
    height: 48px;
  }

  .brand strong {
    font-size: 17px;
  }

  .brand span {
    display: none;
  }

  .hero {
    min-height: 520px;
  }

  .hero-content h1,
  .hero-content h2 {
    font-size: 30px;
  }

  .hero-content p,
  .hero-content span {
    font-size: 16px;
  }

  .section {
    padding: 54px 0;
  }

  h2 {
    font-size: 27px;
  }

  .stats-panel,
  .product-grid,
  .workshop-grid,
  .equipment-strip,
  .partner-row,
  .certificate-grid,
  .process-list {
    grid-template-columns: 1fr;
  }

  .image-stack {
    grid-template-columns: 1fr;
  }

  .image-stack img,
  .image-stack img:nth-child(2) {
    height: 240px;
  }

  .contact-card a,
  .contact-card div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .page-banner {
    padding: 56px 0;
  }

  .page-banner h1 {
    font-size: 32px;
  }

  .news-list-section {
    padding: 32px 0 54px;
  }

  .news-shell {
    padding: 24px 16px 10px;
  }

  .news-title-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .news-title-row span {
    white-space: normal;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .news-item time {
    grid-column: auto;
    font-size: 15px;
  }

  .news-title {
    font-size: 20px;
  }

  .news-tabs {
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
  }

  .news-tabs a {
    width: 100%;
  }

  .article-shell {
    margin-top: 32px;
    margin-bottom: 54px;
    padding: 26px 16px 34px;
  }

  .article-shell h1 {
    font-size: 25px;
    text-align: left;
  }

  .article-meta {
    text-align: left;
  }

  .article-shell p {
    font-size: 16px;
    line-height: 1.9;
  }
}