:root {
  color-scheme: light;
  --navy: #0f1b3d;
  --navy-soft: #1a2a4a;
  --green: #2d5a3b;
  --green-bright: #3a7d5a;
  --amber: #c4a46c;
  --paper: #f8f6f1;
  --white: #ffffff;
  --ink: #202722;
  --muted: #66716a;
  --line: #dce4dd;
  --pale-green: #e8efe8;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 76px;
  padding: 12px clamp(20px, 4.5vw, 72px);
  background: rgba(248, 246, 241, 0.94);
  border-bottom: 1px solid rgba(15, 27, 61, 0.1);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 290px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  place-items: center;
  color: var(--white);
  background: var(--green);
  border-radius: 6px;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 14px;
  font-weight: 700;
}

.brand-copy {
  display: grid;
  line-height: 1.25;
}

.brand-copy strong {
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 16px;
}

.brand-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 26px);
  color: #445049;
  font-size: 14px;
  white-space: nowrap;
}

.site-nav a {
  text-decoration: none;
}

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

.site-nav .nav-contact {
  padding: 8px 14px;
  color: var(--white);
  background: var(--green);
  border-radius: 6px;
}

.hero {
  position: relative;
  display: grid;
  min-height: calc(100vh - 76px);
  overflow: hidden;
  color: var(--white);
  background: var(--navy) url("assets/hero-botanical-lab.jpg") center / cover no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 18, 37, 0.96) 0%, rgba(8, 18, 37, 0.81) 42%, rgba(8, 18, 37, 0.18) 74%);
}

.hero-content {
  position: relative;
  z-index: 1;
  align-self: center;
  max-width: 820px;
  padding: 88px clamp(20px, 5vw, 80px) 132px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--amber);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

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

h1,
h2 {
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
}

h1 {
  max-width: 790px;
  margin-bottom: 28px;
  font-size: clamp(48px, 6.8vw, 88px);
  font-weight: 700;
  line-height: 1.14;
}

h2 {
  margin-bottom: 0;
  color: var(--navy);
  font-size: clamp(30px, 4.2vw, 52px);
  line-height: 1.25;
}

h3 {
  margin-bottom: 8px;
  color: var(--navy);
  font-size: 21px;
  line-height: 1.35;
}

.hero-text {
  max-width: 650px;
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 1.8vw, 21px);
}

.hero-en {
  max-width: 620px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 14px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--green-bright);
  border-radius: 6px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: var(--white);
  background: var(--green-bright);
}

.button.ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.52);
  background: rgba(255, 255, 255, 0.08);
}

.hero-note {
  position: absolute;
  right: clamp(20px, 5vw, 80px);
  bottom: 38px;
  z-index: 1;
  display: grid;
  padding-left: 18px;
  border-left: 2px solid var(--amber);
}

.hero-note span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 10px;
}

.hero-note strong {
  font-family: Georgia, serif;
  font-size: 22px;
}

.proof {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 0 clamp(20px, 5vw, 80px);
  color: var(--white);
  background: var(--navy);
}

.proof div {
  display: grid;
  align-content: center;
  min-height: 132px;
  padding: 22px 26px;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.proof div:last-child {
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.proof strong {
  color: var(--amber);
  font-family: Georgia, serif;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.2;
}

.proof span {
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
}

.section {
  padding: 96px clamp(20px, 5vw, 80px);
  border-top: 1px solid var(--line);
}

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

.section-heading.horizontal {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 56px;
  align-items: end;
}

.section-heading.horizontal > p {
  margin-bottom: 2px;
  color: var(--muted);
}

.about {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 56px 80px;
}

.about-copy {
  max-width: 780px;
  color: var(--muted);
  font-size: 17px;
}

.about-copy .lead {
  color: var(--ink);
  font-size: 22px;
  line-height: 1.65;
}

.about-en {
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-family: Georgia, serif;
  font-size: 15px;
  font-style: italic;
}

.mission-grid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.mission-grid article {
  min-height: 210px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.54);
}

.mission-grid span,
.service-no {
  color: var(--green-bright);
  font-size: 12px;
  font-weight: 800;
}

.mission-grid p,
.service-item > p,
.research-intro > p,
.insight-grid p {
  color: var(--muted);
}

.services {
  background: var(--white);
}

.service-list {
  border-top: 1px solid var(--line);
}

.service-item {
  display: grid;
  grid-template-columns: 54px minmax(220px, 0.75fr) minmax(280px, 1.25fr);
  gap: 24px;
  align-items: center;
  min-height: 150px;
  padding: 28px 6px;
  border-bottom: 1px solid var(--line);
  transition: background 180ms ease, padding 180ms ease;
}

.service-item:hover {
  padding-right: 18px;
  padding-left: 18px;
  background: var(--pale-green);
}

.service-item h3 {
  margin-bottom: 2px;
}

.service-item div p {
  margin-bottom: 0;
  color: var(--green-bright);
  font-size: 12px;
}

.service-item > p {
  margin-bottom: 0;
}

.research {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 70px;
  color: var(--white);
  background: var(--navy-soft);
}

.research h2 {
  color: var(--white);
}

.research-intro > p {
  margin-top: 26px;
  color: rgba(255, 255, 255, 0.68);
}

.research-capabilities {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.13);
}

.research-capabilities div {
  display: grid;
  align-content: space-between;
  min-height: 150px;
  padding: 22px;
  background: rgba(15, 27, 61, 0.78);
}

.research-capabilities span {
  color: var(--amber);
  font-size: 12px;
}

.research-capabilities strong {
  font-size: 16px;
}

.insights {
  background: var(--pale-green);
}

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

.insight-grid article {
  min-height: 250px;
  padding: 28px;
  border: 1px solid rgba(45, 90, 59, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.insight-grid time {
  display: inline-block;
  margin-bottom: 44px;
  color: var(--green-bright);
  font-weight: 700;
}

.credentials {
  background: var(--white);
}

.credential-layout {
  display: grid;
  grid-template-columns: minmax(220px, 340px) minmax(0, 1fr);
  gap: 30px;
}

.license-preview {
  display: grid;
  align-content: center;
  justify-items: center;
  min-height: 320px;
  margin: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.license-preview img {
  width: min(100%, 260px);
  height: auto;
}

.license-preview figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.registration-list,
.contact-list {
  display: grid;
  gap: 1px;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.registration-list div,
.contact-list div {
  display: grid;
  grid-template-columns: 165px 1fr;
  gap: 20px;
  padding: 20px 22px;
  background: var(--white);
}

.registration-list dt,
.contact-list dt {
  color: var(--muted);
}

.registration-list dd,
.contact-list dd {
  margin: 0;
  font-weight: 650;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 70px;
  background: var(--paper);
}

.contact-copy > p:not(.section-kicker) {
  max-width: 570px;
  margin: 24px 0 30px;
  color: var(--muted);
}

.contact-list a {
  color: var(--green);
  text-decoration: none;
}

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  padding: 40px clamp(20px, 5vw, 80px);
  color: rgba(255, 255, 255, 0.68);
  background: var(--navy);
}

.site-footer > div {
  display: grid;
}

.site-footer strong {
  color: var(--white);
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 18px;
}

.site-footer span,
.site-footer a {
  font-size: 12px;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.68);
  text-decoration: none;
}

.footer-meta {
  justify-items: end;
}

@media (max-width: 1050px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: 760px;
  }
}

@media (max-width: 820px) {
  .site-header {
    position: static;
  }

  .brand {
    min-width: 0;
  }

  .site-nav {
    flex-wrap: wrap;
    gap: 18px;
    overflow: visible;
    white-space: normal;
  }

  .hero {
    min-height: 720px;
    background-position: 61% center;
  }

  .hero-overlay {
    background: linear-gradient(90deg, rgba(8, 18, 37, 0.96), rgba(8, 18, 37, 0.66));
  }

  .hero-content {
    align-self: end;
    padding-top: 110px;
    padding-bottom: 120px;
  }

  h1 {
    font-size: clamp(40px, 12vw, 58px);
  }

  .hero-note {
    right: 20px;
    bottom: 28px;
  }

  .proof,
  .mission-grid,
  .insight-grid,
  .research-capabilities {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof {
    padding: 0 20px;
  }

  .proof div:nth-child(3) {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
  }

  .proof div:nth-child(4) {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    border-right: 1px solid rgba(255, 255, 255, 0.12);
  }

  .section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .about,
  .section-heading.horizontal,
  .research,
  .credential-layout,
  .contact {
    grid-template-columns: 1fr;
  }

  .service-item {
    grid-template-columns: 42px 1fr;
  }

  .service-item > p {
    grid-column: 2;
  }
}

@media (max-width: 520px) {
  .brand-copy strong {
    font-size: 14px;
  }

  .site-nav {
    gap: 10px 16px;
    font-size: 13px;
  }

  .site-nav .nav-contact {
    padding: 6px 10px;
  }

  .hero {
    min-height: 680px;
  }

  .hero-content {
    padding-right: 20px;
    padding-left: 20px;
  }

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

  .hero-en {
    display: none;
  }

  .proof,
  .mission-grid,
  .insight-grid,
  .research-capabilities {
    grid-template-columns: 1fr;
  }

  .proof div,
  .proof div:nth-child(3),
  .proof div:nth-child(4) {
    min-height: 104px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    border-right: 1px solid rgba(255, 255, 255, 0.12);
  }

  .service-item {
    grid-template-columns: 34px 1fr;
    gap: 12px;
  }

  .registration-list div,
  .contact-list div {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-meta {
    justify-items: start;
  }
}

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

  .button,
  .service-item {
    transition: none;
  }
}