:root {
  --ink: #11252c;
  --muted: #5f6f76;
  --line: #dce8e7;
  --paper: #ffffff;
  --soft: #eef7f5;
  --soft-blue: #eaf3fb;
  --teal: #0d7f78;
  --blue: #276a9f;
  --gold: #b58a45;
  --shadow: 0 20px 55px rgba(17, 37, 44, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 8px clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(220, 232, 231, 0.9);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: 176px;
  height: 54px;
}

.brand-logo {
  width: 176px;
  height: 54px;
  object-fit: contain;
  object-position: left center;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 28px);
  color: #294047;
  font-size: 15px;
}

.site-nav a {
  padding: 8px 0;
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: calc(100vh - 68px);
  display: grid;
  align-items: end;
  padding: clamp(52px, 8vw, 110px) clamp(18px, 5vw, 72px);
  overflow: hidden;
}

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

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: linear-gradient(90deg, rgba(8, 30, 36, 0.88) 0%, rgba(8, 30, 36, 0.62) 44%, rgba(8, 30, 36, 0.14) 100%);
}

.hero-content {
  max-width: 760px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #e6c17d;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(40px, 6vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.35;
}

.hero-copy {
  max-width: 680px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 2vw, 21px);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 20px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  font-weight: 700;
}

.btn.primary {
  color: #fff;
  background: var(--teal);
  border-color: var(--teal);
}

.btn.ghost {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.section {
  padding: clamp(58px, 8vw, 104px) clamp(18px, 5vw, 72px);
}

.section-heading {
  max-width: 980px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-heading.narrow {
  max-width: 790px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 36px;
  max-width: 1180px;
  margin: 0 auto;
  align-items: start;
}

.intro-copy {
  color: #30464d;
  font-size: 18px;
}

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

.stats div,
.feature-card,
.project-grid article,
.expert-grid article,
.strength-list article,
.timeline article,
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(17, 37, 44, 0.06);
}

.stats div {
  padding: 24px;
}

.stats strong {
  display: block;
  color: var(--teal);
  font-size: 33px;
  line-height: 1.15;
}

.stats span {
  color: var(--muted);
}

.image-band {
  padding-top: 0;
  background: linear-gradient(180deg, #fff 0%, var(--soft) 100%);
}

.image-strip {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1fr;
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.image-strip img,
.gallery-grid img,
.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.image-strip img {
  aspect-ratio: 4 / 3;
}

.card-grid {
  display: grid;
  max-width: 1180px;
  margin: 0 auto;
  gap: 18px;
}

.card-grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-card {
  min-height: 280px;
  padding: 26px;
}

.card-index {
  display: block;
  margin-bottom: 34px;
  color: var(--gold);
  font-weight: 800;
}

.feature-card p,
.project-grid p,
.strength-list p,
.expert-grid p,
.timeline p {
  margin-bottom: 0;
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  background: var(--soft-blue);
}

.split-media img {
  aspect-ratio: 5 / 4;
}

.split-content {
  max-width: 640px;
}

.split-content > p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.pill-list span {
  padding: 8px 12px;
  color: #1c535d;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
}

.muted {
  background: var(--soft);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.project-grid article {
  padding: 24px;
}

.strength-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 1060px;
  margin: 0 auto;
}

.strength-list article {
  padding: 26px 28px;
}

.experts {
  background: #0f2930;
  color: #fff;
}

.experts .section-heading .eyebrow {
  color: #e6c17d;
}

.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.expert-grid article {
  min-height: 230px;
  padding: 24px;
  color: var(--ink);
}

.timeline-section {
  background: linear-gradient(180deg, #fff 0%, #f8fbfb 100%);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.timeline article {
  position: relative;
  padding: 28px;
}

.timeline article::before {
  display: block;
  width: 42px;
  height: 4px;
  margin-bottom: 24px;
  background: var(--teal);
  border-radius: 999px;
  content: "";
}

.timeline span {
  color: var(--gold);
  font-weight: 800;
}

.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 0.8fr 1fr;
  grid-auto-rows: 250px;
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.gallery-grid img:nth-child(2) {
  grid-row: span 2;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 440px);
  gap: 36px;
  align-items: center;
  padding: clamp(58px, 8vw, 104px) clamp(18px, 5vw, 72px);
  color: #fff;
  background: linear-gradient(135deg, #0f2930 0%, #115f62 100%);
}

.contact-section h2 {
  max-width: 900px;
}

.contact-card {
  padding: 26px;
  color: var(--ink);
}

.contact-card p {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.contact-card p:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.contact-card span {
  color: var(--muted);
  text-align: right;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(18px, 5vw, 72px);
  color: #d8e6e6;
  background: #071b20;
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer a {
  color: inherit;
}

@media (max-width: 1100px) {
  .card-grid.four,
  .project-grid,
  .expert-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-nav {
    gap: 14px;
    font-size: 14px;
  }
}

@media (max-width: 820px) {
  .site-header {
    min-height: 66px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 66px;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 12px;
    border-radius: 8px;
  }

  .site-nav a:hover {
    background: var(--soft);
  }

  .hero {
    min-height: 690px;
    align-items: center;
    padding-top: 86px;
  }

  .hero::after {
    background: linear-gradient(180deg, rgba(8, 30, 36, 0.86) 0%, rgba(8, 30, 36, 0.68) 58%, rgba(8, 30, 36, 0.42) 100%);
  }

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

  .image-strip,
  .strength-list,
  .timeline,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-auto-rows: auto;
  }

  .gallery-grid img,
  .gallery-grid img:nth-child(2) {
    grid-row: auto;
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 560px) {
  .brand {
    width: 142px;
    height: 44px;
  }

  .brand-logo {
    width: 142px;
    height: 44px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 28px;
  }

  .hero {
    min-height: 650px;
  }

  .hero-actions,
  .btn {
    width: 100%;
  }

  .stats,
  .card-grid.four,
  .project-grid,
  .expert-grid {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .expert-grid article {
    min-height: 0;
  }

  .section-heading {
    text-align: left;
  }

  .contact-card p,
  .site-footer {
    display: block;
  }

  .contact-card span {
    display: block;
    margin-top: 4px;
    text-align: left;
  }

  .site-footer a {
    display: inline-block;
    margin-top: 10px;
  }
}