:root {
  --green: #009f45;
  --green-dark: #007836;
  --green-soft: #e8f6ed;
  --ink: #22282b;
  --muted: #65727a;
  --line: #dbe4df;
  --paper: #ffffff;
  --wash: #f6f8f5;
  --steel: #24637c;
  --orange: #ef7a1a;
  --shadow: 0 20px 60px rgba(23, 45, 36, 0.12);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

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

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

button {
  font: inherit;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 28px;
  min-height: 76px;
  padding: 12px clamp(20px, 5vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(219, 228, 223, 0.7);
  backdrop-filter: blur(14px);
}

.site-header.is-scrolled {
  box-shadow: 0 14px 40px rgba(23, 45, 36, 0.08);
}

.brand img {
  width: 132px;
  height: auto;
}

.nav {
  display: flex;
  justify-content: center;
  gap: clamp(18px, 3vw, 34px);
  font-size: 15px;
  color: #2c3437;
  white-space: nowrap;
}

.nav a {
  position: relative;
  padding: 8px 0;
}

.nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
  content: "";
}

.nav a:hover::after,
.nav a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-call {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  color: var(--green-dark);
  font-weight: 700;
  border: 1px solid rgba(0, 159, 69, 0.28);
  border-radius: 999px;
}

.header-call::before {
  width: 8px;
  height: 8px;
  margin-right: 8px;
  background: var(--orange);
  border-radius: 50%;
  content: "";
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  background: var(--green);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: #fff;
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-button[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-button[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-button[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 76svh;
  overflow: hidden;
  isolation: isolate;
  display: flex;
  align-items: center;
  color: #fff;
  background: #122720;
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.94) contrast(1.02);
}

.hero-overlay {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(5, 34, 24, 0.86) 0%, rgba(5, 34, 24, 0.62) 42%, rgba(5, 34, 24, 0.12) 100%),
    linear-gradient(0deg, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.05));
}

.hero-inner {
  padding: 78px 0 70px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #83e4aa;
}

.hero h1 {
  margin: 0;
  max-width: 680px;
  font-size: clamp(48px, 8vw, 92px);
  line-height: 1;
  letter-spacing: 0;
}

.hero-kicker {
  margin: 22px 0 0;
  color: #e6fff0;
  font-size: clamp(24px, 4vw, 45px);
  font-weight: 600;
  line-height: 1.2;
}

.hero-copy {
  max-width: 680px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(16px, 1.8vw, 20px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  font-weight: 800;
  border-radius: 999px;
}

.primary-action {
  color: #06351d;
  background: #fff;
}

.secondary-action {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.quick-stats {
  padding: 30px 0;
  background: var(--green);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.28);
}

.stats-grid article {
  min-height: 118px;
  padding: 20px 18px;
  color: #fff;
  background: var(--green);
}

.stats-grid strong {
  display: block;
  font-size: clamp(27px, 3.2vw, 42px);
  line-height: 1;
}

.stats-grid span {
  display: block;
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 14px;
}

section {
  scroll-margin-top: 96px;
}

.about-section,
.business-section,
.capability-section,
.materials-section,
.trust-section {
  padding: clamp(76px, 9vw, 118px) 0;
}

.about-section {
  background: linear-gradient(180deg, #fff 0%, var(--wash) 100%);
}

.section-heading h2 {
  margin: 0;
  max-width: 780px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading p + h2 {
  margin-top: 4px;
}

.heading-split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.65fr);
  gap: clamp(28px, 6vw, 90px);
  align-items: end;
  margin-bottom: 44px;
}

.heading-split > p {
  margin: 0;
  color: var(--muted);
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.75fr) minmax(320px, 1fr);
  gap: clamp(30px, 6vw, 80px);
  align-items: start;
}

.about-copy {
  font-size: 18px;
  color: #3f494d;
}

.about-copy p:first-child {
  margin-top: 0;
}

.values-panel {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 14px;
}

.values-panel div {
  min-height: 142px;
  padding: 25px;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 5px solid var(--green);
  border-radius: var(--radius);
  box-shadow: 0 14px 40px rgba(23, 45, 36, 0.06);
}

.values-panel span {
  display: block;
  color: var(--green);
  font-weight: 800;
}

.values-panel strong {
  display: block;
  margin-top: 16px;
  font-size: 19px;
  line-height: 1.55;
}

.business-section {
  background: #fff;
}

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

.business-card {
  position: relative;
  min-height: 276px;
  padding: 28px;
  overflow: hidden;
  background: var(--wash);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.business-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: var(--green);
  content: "";
}

.business-card.is-featured {
  color: #fff;
  background: var(--green-dark);
  border-color: var(--green-dark);
}

.business-card.is-featured::before {
  background: var(--orange);
}

.card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  color: var(--green-dark);
  font-weight: 900;
  background: #fff;
  border: 1px solid rgba(0, 159, 69, 0.26);
  border-radius: 50%;
}

.business-card.is-featured .card-index {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.35);
}

.business-card h3 {
  margin: 24px 0 12px;
  font-size: 22px;
  line-height: 1.35;
}

.business-card p {
  margin: 0;
  color: var(--muted);
}

.business-card.is-featured p {
  color: rgba(255, 255, 255, 0.84);
}

.service-section {
  padding: clamp(72px, 8vw, 108px) 0;
  color: #fff;
  background: #183932;
}

.service-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.8fr) minmax(320px, 1fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
}

.service-visual {
  padding: 26px;
  background: #fff;
  border-radius: var(--radius);
}

.service-section .section-heading h2,
.service-section p {
  color: #fff;
}

.service-section p {
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.chip-list li {
  padding: 8px 12px;
  color: #dfffee;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
}

.capability-section {
  background: var(--wash);
}

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

.process-grid article {
  position: relative;
  min-height: 254px;
  padding: 28px 20px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.process-grid article::after {
  position: absolute;
  top: 49px;
  right: -14px;
  width: 28px;
  height: 2px;
  background: var(--green);
  content: "";
}

.process-grid article:last-child::after {
  display: none;
}

.process-grid span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  color: #fff;
  font-weight: 900;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 0 7px var(--green-soft);
}

.process-grid h3 {
  margin: 28px 0 10px;
  color: var(--green-dark);
  font-size: 21px;
}

.process-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.showcase-section {
  padding: clamp(76px, 9vw, 120px) 0;
  background: #fff;
}

.showcase-section .section-heading {
  margin-bottom: 42px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 20px;
}

.showcase-item {
  min-height: 100%;
  overflow: hidden;
  background: var(--wash);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.showcase-item.large {
  grid-row: span 2;
}

.showcase-item img {
  width: 100%;
  height: auto;
  object-fit: contain;
  background: #fff;
}

.showcase-item.large img {
  height: auto;
}

.showcase-item div {
  padding: 24px 26px 28px;
}

.showcase-item span {
  color: var(--orange);
  font-size: 14px;
  font-weight: 900;
}

.showcase-item h3 {
  margin: 7px 0 10px;
  font-size: 24px;
  line-height: 1.3;
}

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

.materials-section {
  background: #f7faf9;
}

.materials-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(320px, 1fr);
  gap: clamp(34px, 6vw, 86px);
  align-items: center;
}

.materials-layout > div > p {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.advantage-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.advantage-list span {
  padding: 9px 14px;
  color: var(--green-dark);
  font-weight: 800;
  background: #fff;
  border: 1px solid rgba(0, 159, 69, 0.24);
  border-radius: 999px;
}

.materials-gallery {
  display: grid;
  gap: 18px;
}

.materials-gallery img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.media-section {
  padding: clamp(72px, 8vw, 106px) 0;
  background: #fff;
}

.media-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(320px, 1fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
}

.media-layout img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.media-layout p {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
}

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

.media-tags span {
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 8px 13px;
  color: #113228;
  background: var(--green-soft);
  border-left: 4px solid var(--green);
}

.trust-section {
  background: var(--wash);
}

.trust-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) 390px;
  gap: clamp(30px, 5vw, 70px);
  align-items: start;
}

.trust-layout p {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.certificates {
  width: 100%;
  margin-top: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.partner-panel {
  padding: 30px;
  color: #fff;
  background: var(--steel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.partner-panel h3 {
  margin: 0;
  font-size: 30px;
}

.partner-panel p {
  color: rgba(255, 255, 255, 0.84);
}

.partner-panel img {
  width: 100%;
  margin-top: 28px;
  border-radius: var(--radius);
}

.site-footer {
  padding: clamp(54px, 8vw, 90px) 0;
  color: #fff;
  background: var(--green);
}

.footer-layout {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(320px, 0.9fr);
  gap: 28px;
  align-items: end;
}

.footer-kicker {
  margin: 0 0 18px;
  color: rgba(255, 255, 255, 0.82);
}

.site-footer h2 {
  margin: 0;
  font-size: clamp(40px, 6vw, 70px);
  line-height: 1;
}

.site-footer p {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.84);
}

address {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  font-style: normal;
}

address img {
  width: 108px;
  height: 108px;
  padding: 6px;
  background: #fff;
}

address div {
  display: grid;
  gap: 4px;
}

address a {
  font-size: 20px;
  font-weight: 800;
}

address span {
  color: rgba(255, 255, 255, 0.84);
}

@media (max-width: 1040px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
  }

  .nav {
    position: fixed;
    top: 76px;
    right: 18px;
    left: 18px;
    display: grid;
    gap: 0;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease;
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    padding: 13px 12px;
  }

  .header-call {
    justify-self: end;
  }

  .menu-button {
    display: inline-block;
  }

  .stats-grid,
  .business-map {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .process-grid article::after {
    display: none;
  }

  .trust-layout {
    grid-template-columns: 1fr;
  }

  .partner-panel {
    max-width: 620px;
  }
}

@media (max-width: 780px) {
  .section-inner {
    width: min(100% - 28px, var(--max));
  }

  .site-header {
    min-height: 70px;
    gap: 14px;
    padding: 10px 14px;
  }

  .brand img {
    width: 112px;
  }

  .header-call {
    display: none;
  }

  .nav {
    top: 70px;
  }

  .hero {
    min-height: 82svh;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(5, 34, 24, 0.82) 0%, rgba(5, 34, 24, 0.7) 58%, rgba(5, 34, 24, 0.42) 100%),
      rgba(0, 0, 0, 0.08);
  }

  .hero-inner {
    padding: 58px 0 52px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    max-width: 310px;
  }

  .stats-grid,
  .values-panel,
  .business-map,
  .process-grid,
  .showcase-grid,
  .materials-layout,
  .media-layout,
  .footer-layout,
  .about-layout,
  .service-layout,
  .heading-split {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    gap: 1px;
  }

  .stats-grid article {
    min-height: 100px;
  }

  .values-panel {
    margin-top: 0;
  }

  .business-card {
    min-height: auto;
  }

  .process-grid article {
    min-height: auto;
  }

  .showcase-item.large {
    grid-row: auto;
  }

  .showcase-item img,
  .showcase-item.large img {
    height: auto;
  }

  .media-tags {
    grid-template-columns: 1fr;
  }

  address {
    justify-content: flex-start;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 52px;
  }

  .hero-kicker {
    font-size: 28px;
  }

  .hero-copy {
    font-size: 16px;
  }

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

  .section-heading h2 {
    font-size: 31px;
  }

  .about-section,
  .business-section,
  .capability-section,
  .materials-section,
  .trust-section,
  .showcase-section,
  .service-section,
  .media-section {
    padding: 62px 0;
  }

  address {
    display: grid;
  }
}