:root {
  --teal: #3d9e97;
  --teal-dark: #2f7f7a;
  --teal-deep: #246d69;
  --orange: #e07b30;
  --orange-dark: #c86620;
  --text: #2c3338;
  --muted: #667078;
  --line: #e4e8ea;
  --bg: #ffffff;
  --soft: #f5f7f8;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --serif: "Cormorant Garamond", "Times New Roman", serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 64px;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2 { font-weight: 700; line-height: 1.3; }

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  z-index: 80;
  padding: 8px 12px;
  background: var(--orange);
  color: #fff;
}
.skip:focus { top: 12px; }

.wrap {
  width: min(calc(100% - 48px), 1120px);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 56px;
  padding: 0 28px;
  background: var(--teal);
  color: #fff;
}

.logo {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.menu {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  margin-left: auto;
  font-size: 0.9rem;
}

.menu > a,
.has-sub > a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  color: rgba(255, 255, 255, 0.92);
}

.menu > a:hover,
.has-sub:hover > a,
.menu > a:focus-visible,
.has-sub > a:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.has-sub { position: relative; }

.caret {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
}

.submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 148px;
  padding: 6px 0;
  background: #fff;
  color: var(--text);
  box-shadow: 0 10px 28px rgba(22, 40, 44, 0.16);
}

.submenu a {
  display: block;
  padding: 10px 18px;
  white-space: nowrap;
}

.submenu a:hover,
.submenu a:focus-visible {
  background: var(--teal);
  color: #fff;
}

.has-sub:hover .submenu,
.has-sub:focus-within .submenu {
  display: block;
}

.menu > a.menu-cta { display: none; }

.top-cta {
  padding: 8px 14px;
  background: var(--teal-dark);
  font-size: 0.88rem;
  white-space: nowrap;
}

.top-cta:hover,
.top-cta:focus-visible { background: var(--teal-deep); }

.burger {
  display: none;
  width: 40px;
  height: 40px;
  margin-left: auto;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: transparent;
  cursor: pointer;
}

.burger span {
  display: block;
  width: 16px;
  height: 1.5px;
  margin: 4px auto;
  background: #fff;
}

.hero {
  position: relative;
  min-height: 560px;
  height: 68vh;
  max-height: 720px;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(18, 42, 48, 0.28), rgba(18, 42, 48, 0.42));
}

.hero-copy {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px 20px;
  color: #fff;
  text-shadow: 0 2px 16px rgba(30, 50, 55, 0.35);
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.25rem, 2.6vw, 2rem);
  font-weight: 700;
}

.wordmark {
  margin: 10px 0 6px;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 8.4vw, 6.4rem);
  font-weight: 500;
  letter-spacing: 0.22em;
  line-height: 1;
}

.tag {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-style: italic;
  letter-spacing: 0.04em;
}

.block {
  position: relative;
  padding: 88px 0 72px;
  text-align: center;
  overflow: hidden;
}

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

.pattern {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(61, 158, 151, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 158, 151, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.block h2,
.facts h2,
.footer h2 {
  margin: 0 0 12px;
  font-size: clamp(1.6rem, 2.4vw, 2rem);
}

.lead {
  max-width: 40rem;
  margin: 0 auto 40px;
  color: var(--muted);
}

.sol-grid,
.mosaic {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: stretch;
  text-align: left;
}

.sol-grid figure,
.mosaic figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: #111;
}

.sol-grid img,
.mosaic img,
.campus img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sol-grid img,
.mosaic img {
  height: 280px;
}

.sol-grid figure:last-child:nth-child(odd),
.mosaic figure:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.sol-grid figcaption,
.mosaic figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 8px 12px;
  background: linear-gradient(transparent, rgba(20, 32, 36, 0.72));
  color: #fff;
  font-size: 0.82rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  list-style: none;
  margin: 36px 0 32px;
  padding: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.steps span {
  display: block;
  margin-bottom: 4px;
  color: var(--teal);
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 22px;
  font-size: 0.9rem;
  color: #fff;
}

.btn-orange { background: var(--orange); }
.btn-orange:hover,
.btn-orange:focus-visible { background: var(--orange-dark); }

.btn-teal { background: var(--teal); }
.btn-teal:hover,
.btn-teal:focus-visible { background: var(--teal-dark); }

.facts {
  padding: 64px 0;
  background: var(--bg);
  border-top: 1px solid var(--line);
}

.facts-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.facts-copy p {
  color: var(--muted);
  margin: 0 0 24px;
}

.fact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.fact-nums {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0;
  text-align: center;
}

.fact-nums dt {
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 6px;
}

.fact-nums dd {
  margin: 0;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  font-weight: 700;
  color: var(--teal-dark);
}

.fact-nums a {
  color: var(--teal-dark);
  border-bottom: 1px solid rgba(47, 127, 122, 0.35);
}

.fact-nums a:hover,
.fact-nums a:focus-visible {
  border-bottom-color: var(--teal-dark);
}

.campus {
  position: relative;
  min-height: 320px;
}

.campus img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.campus-label {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  width: min(calc(100% - 32px), 720px);
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.92);
  text-align: center;
  box-shadow: 0 8px 24px rgba(20, 32, 36, 0.12);
}

.campus-label p { margin: 0; }
.campus-label p:first-child {
  color: var(--teal);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}

.footer {
  background: var(--teal-deep);
  color: #e7f3f2;
  padding: 56px 0 28px;
}

.footer-head p {
  margin: 0 0 28px;
  color: rgba(255, 255, 255, 0.72);
}

.registry {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 0 0 28px;
}

.registry dt {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 8px;
}

.registry dd { margin: 0; text-wrap: pretty; }

.registry a {
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.45);
}

.legal {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 980px) {
  .facts-grid,
  .registry,
  .steps {
    grid-template-columns: 1fr;
  }

  .sol-grid img,
  .mosaic img { height: 220px; }

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

@media (max-width: 760px) {
  .topbar { padding: 0 16px; }

  .menu {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--teal-dark);
    padding: 8px 0 12px;
  }

  .menu.open { display: flex; }

  .menu > a,
  .has-sub > a {
    padding: 12px 20px;
  }

  .submenu {
    display: none;
  }

  .has-sub:hover .submenu,
  .has-sub:focus-within .submenu {
    display: none;
  }

  .has-sub { display: none; }
  .menu > a.menu-cta { display: flex; }
  .top-cta { display: none; }
  .burger { display: block; }

  .hero {
    height: auto;
    min-height: 460px;
  }

  .wordmark { letter-spacing: 0.12em; }

  .wrap { width: min(calc(100% - 32px), 1120px); }

  .block { padding: 56px 0; }

  .sol-grid,
  .mosaic {
    grid-template-columns: 1fr;
  }

  .sol-grid img,
  .mosaic img { height: 220px; }

  .sol-grid figure:last-child:nth-child(odd),
  .mosaic figure:last-child:nth-child(odd) {
    grid-column: auto;
  }

  .fact-nums {
    grid-template-columns: 1fr;
    text-align: left;
    margin-top: 12px;
  }

  .campus img { height: 260px; }
}

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