:root {
  --ink: #18211f;
  --text: #31403c;
  --muted: #697872;
  --paper: #f5f1e8;
  --panel: #ffffff;
  --line: #d9dfd8;
  --green: #2f6f4e;
  --deep: #12342b;
  --teal: #2c7772;
  --clay: #a65f45;
  --gold: #c39336;
  --blue: #345c7d;
  --steel: #56616b;
  --shadow: 0 24px 70px rgba(24, 33, 31, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Noto Sans CJK SC",
    "Source Han Sans SC",
    Arial,
    sans-serif;
  background: var(--paper);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 14px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid rgba(217, 223, 216, 0.9);
  background: rgba(245, 241, 232, 0.94);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  font-weight: 900;
  background: var(--deep);
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.24;
}

.brand strong {
  font-size: 16px;
}

.brand small {
  color: var(--clay);
  font-size: 12px;
  font-weight: 800;
}

.site-nav {
  display: flex;
  gap: 24px;
  color: var(--text);
  font-size: 14px;
}

.site-nav a {
  padding: 10px 0;
}

.site-nav a:hover {
  color: var(--green);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: clamp(34px, 6vw, 82px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(62px, 8vw, 108px) clamp(18px, 5vw, 72px) 54px;
  background:
    linear-gradient(115deg, rgba(18, 52, 43, 0.08), transparent 42%),
    linear-gradient(180deg, #fffdf8 0%, var(--paper) 100%);
}

.eyebrow,
.section-label {
  margin: 0 0 16px;
  color: var(--clay);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 880px;
  margin-bottom: 26px;
  font-size: clamp(40px, 5.2vw, 68px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.32;
}

p {
  color: var(--muted);
  line-height: 1.82;
}

.english,
.heading-en,
.hero-en,
.card-en {
  color: #5d6d68;
  font-family: Arial, Helvetica, sans-serif;
}

.english {
  margin-top: -6px;
  font-size: 15px;
  line-height: 1.72;
}

.heading-en {
  max-width: 820px;
  margin: -8px 0 18px;
  color: var(--clay);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 800;
  line-height: 1.42;
}

.hero-en {
  max-width: 720px;
  margin: -8px 0 22px;
  color: var(--clay);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 800;
  line-height: 1.32;
}

.card-en {
  margin-top: 6px !important;
  font-size: 13px;
  line-height: 1.42 !important;
  opacity: 0.72 !important;
}

.hero-text {
  max-width: 770px;
  color: var(--text);
  font-size: 18px;
}

.lead {
  max-width: 920px;
  color: var(--text);
  font-size: 20px;
  line-height: 1.76;
}

.lead-en {
  max-width: 920px;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
}

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

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

.button.secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.8);
}

.hero-visual {
  position: relative;
  min-height: 620px;
  overflow: hidden;
  border: 1px solid rgba(217, 223, 216, 0.95);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(24, 33, 31, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(24, 33, 31, 0.05) 1px, transparent 1px),
    linear-gradient(135deg, #fffaf0, #eaf3ef);
  background-size: 34px 34px, 34px 34px, auto;
  box-shadow: var(--shadow);
}

.hero-visual > img {
  position: absolute;
  inset: 50%;
  width: 76%;
  max-width: 500px;
  transform: translate(-50%, -50%);
  opacity: 0.9;
}

.visual-card {
  position: absolute;
  width: min(278px, 48%);
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 8px;
  color: #fff;
  box-shadow: 0 20px 44px rgba(24, 33, 31, 0.18);
}

.visual-card span,
.visual-card strong {
  display: block;
}

.visual-card span {
  margin-bottom: 9px;
  font-size: 12px;
  font-weight: 900;
  opacity: 0.82;
  text-transform: uppercase;
}

.visual-card strong {
  margin-bottom: 8px;
  font-size: 25px;
}

.visual-card p {
  margin: 0;
  color: inherit;
  opacity: 0.86;
  line-height: 1.55;
}

.factory-card {
  top: 52px;
  left: 34px;
  background: var(--clay);
}

.europe-card {
  top: 242px;
  right: 34px;
  background: var(--blue);
}

.logistics-card {
  bottom: 54px;
  left: 48px;
  background: var(--green);
}

.orbit {
  position: absolute;
  border: 3px solid rgba(195, 147, 54, 0.55);
  border-radius: 50%;
}

.orbit.one {
  inset: 132px 90px 126px 90px;
  transform: rotate(-18deg);
}

.orbit.two {
  inset: 172px 126px 166px 126px;
  border-color: rgba(44, 119, 114, 0.45);
  transform: rotate(18deg);
}

.center-point {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 138px;
  height: 138px;
  place-items: center;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(18, 52, 43, 0.16);
  border-radius: 50%;
  color: var(--deep);
  font-size: 15px;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 16px 36px rgba(24, 33, 31, 0.12);
}

.section {
  padding: clamp(68px, 8vw, 112px) clamp(18px, 5vw, 72px);
}

.proof-strip {
  display: grid;
  grid-template-columns: 0.7fr 1fr 1.2fr 1.35fr;
  gap: 1px;
  padding-block: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--line);
}

.proof-strip div {
  min-height: 138px;
  padding: 24px;
  background: #fff;
}

.proof-strip strong,
.proof-strip span {
  display: block;
}

.proof-strip strong {
  margin-bottom: 12px;
  color: var(--deep);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
}

.proof-strip span {
  color: var(--muted);
  line-height: 1.55;
}

.proof-strip small {
  display: block;
  margin-top: 8px;
  color: #7a8782;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  line-height: 1.45;
}

.about,
.services {
  background: #fff;
}

.section-heading {
  max-width: 920px;
  margin-bottom: 36px;
}

.section-heading p {
  font-size: 17px;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.55fr);
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
}

.about-main p:not(.lead) {
  font-size: 17px;
}

.about-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7faf7;
  box-shadow: 0 18px 44px rgba(24, 33, 31, 0.08);
}

.loop {
  color: #fff;
  background: var(--deep);
}

.loop h2,
.loop h3,
.loop .section-label {
  color: #fff;
}

.loop .section-heading p,
.loop-steps p {
  color: rgba(255, 255, 255, 0.74);
}

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

.loop-steps article {
  min-height: 260px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.loop-steps span {
  display: block;
  margin-bottom: 32px;
  color: var(--gold);
  font-size: 24px;
  font-weight: 900;
}

.factory {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
  gap: clamp(34px, 6vw, 78px);
  align-items: center;
  background: #eef5f0;
}

.factory-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.factory-tags span {
  padding: 10px 14px;
  border: 1px solid rgba(47, 111, 78, 0.22);
  border-radius: 8px;
  color: var(--deep);
  background: rgba(255, 255, 255, 0.72);
  font-weight: 800;
}

.image-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(47, 111, 78, 0.18);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.image-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.visual-story {
  display: grid;
  gap: clamp(46px, 7vw, 88px);
  background: #fff;
}

.story-item {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(0, 1fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
}

.story-item.reverse {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
}

.story-item.reverse .image-frame {
  order: 2;
}

.story-item p:not(.section-label) {
  max-width: 760px;
  font-size: 17px;
}

.service-grid,
.advantage-grid {
  display: grid;
  gap: 18px;
}

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

.service-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.service-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8f8f3;
}

.service-card.dark {
  color: #fff;
  border-color: transparent;
  background: var(--blue);
}

.service-card.dark h3,
.service-card.dark .service-top span,
.service-card.dark p,
.service-card.dark li {
  color: #fff;
}

.service-top span {
  display: block;
  margin-bottom: 18px;
  color: var(--clay);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.service-card p {
  font-size: 17px;
}

.service-card ul {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}

.service-card li {
  position: relative;
  padding-left: 24px;
  color: var(--text);
  line-height: 1.6;
}

.service-card li::before {
  position: absolute;
  left: 0;
  color: var(--gold);
  content: "•";
  font-weight: 900;
}

.advantage {
  background: #f8f4ea;
}

.closed-loop {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 30px;
}

.closed-loop span {
  display: grid;
  min-height: 112px;
  place-items: center;
  padding: 16px;
  border: 1px solid rgba(47, 111, 78, 0.18);
  border-radius: 8px;
  color: var(--deep);
  text-align: center;
  font-weight: 900;
  line-height: 1.48;
  background: rgba(255, 255, 255, 0.78);
}

.closed-loop small {
  margin-top: 6px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.25;
  opacity: 0.78;
}

.closed-loop span:nth-child(2) {
  color: #fff;
  background: var(--blue);
}

.closed-loop span:nth-child(3) {
  color: #fff;
  background: var(--green);
}

.closed-loop span:nth-child(4) {
  color: #fff;
  background: var(--clay);
}

.closed-loop span:nth-child(5) {
  background: var(--gold);
}

.advantage-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.advantage-grid article {
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
}

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #fff;
  background: linear-gradient(135deg, var(--deep), #1f4f42);
}

.contact .section-label,
.contact p {
  color: rgba(255, 255, 255, 0.76);
}

.contact h2 {
  max-width: 880px;
}

.contact p {
  max-width: 920px;
  font-size: 17px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px clamp(18px, 5vw, 72px);
  color: var(--muted);
  background: #fff;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1080px) {
  .site-nav {
    position: fixed;
    top: 76px;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
  }

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

  .menu-button {
    display: block;
  }

  .hero,
  .about-layout,
  .factory {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

  .loop-steps,
  .advantage-grid,
  .service-grid.three,
  .closed-loop {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .brand strong {
    font-size: 14px;
  }

  .brand small {
    display: none;
  }

  .hero,
  .section {
    padding-inline: 16px;
  }

  h1 {
    font-size: 35px;
    line-height: 1.16;
  }

  h2 {
    font-size: 30px;
  }

  .hero-text,
  .lead {
    font-size: 17px;
  }

  .hero-actions,
  .contact,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 560px;
  }

  .hero-visual > img {
    width: 100%;
    opacity: 0.42;
  }

  .visual-card {
    width: calc(100% - 40px);
    left: 20px;
    right: auto;
  }

  .factory-card {
    top: 26px;
  }

  .europe-card {
    top: 210px;
  }

  .logistics-card {
    bottom: 28px;
  }

  .orbit,
  .center-point {
    display: none;
  }

  .proof-strip,
  .loop-steps,
  .service-grid,
  .service-grid.three,
  .advantage-grid,
  .closed-loop {
    grid-template-columns: 1fr;
  }

  .proof-strip div {
    min-height: auto;
  }

  .loop-steps article,
  .advantage-grid article {
    min-height: auto;
  }

  .story-item,
  .story-item.reverse {
    grid-template-columns: 1fr;
  }

  .story-item.reverse .image-frame {
    order: 0;
  }
}