:root {
  color-scheme: light;
  --ink: #20302b;
  --muted: #67736d;
  --paper: #f7f4eb;
  --mist: #e7f0ec;
  --leaf: #2f6b4f;
  --leaf-dark: #1d4a39;
  --water: #397b92;
  --clay: #b76d4f;
  --line: rgba(32, 48, 43, 0.14);
  --shadow: 0 24px 70px rgba(30, 52, 45, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

button,
a {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 54px);
  color: #fff;
  transition: background 220ms ease, color 220ms ease, box-shadow 220ms ease;
}

.site-header.scrolled {
  color: var(--ink);
  background: rgba(247, 244, 235, 0.92);
  box-shadow: 0 12px 40px rgba(30, 52, 45, 0.12);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.2;
}

.brand small {
  margin-top: 3px;
  font-size: 11px;
  opacity: 0.78;
}

.nav {
  display: flex;
  gap: 8px;
}

.nav a {
  color: inherit;
  text-decoration: none;
  padding: 8px 11px;
  border-radius: 999px;
  font-size: 14px;
}

.nav a:hover {
  background: rgba(255, 255, 255, 0.22);
}

.site-header.scrolled .nav a:hover {
  background: rgba(47, 107, 79, 0.1);
}

.hero {
  position: relative;
  min-height: 92vh;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 150px clamp(22px, 6vw, 90px) 82px;
  color: #fff;
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-image {
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(13, 33, 29, 0.78), rgba(13, 33, 29, 0.28) 54%, rgba(13, 33, 29, 0.12)),
    linear-gradient(0deg, rgba(13, 33, 29, 0.64), rgba(13, 33, 29, 0.02) 42%);
}

.hero-content {
  position: relative;
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--water);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #d5ede4;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 8vw, 86px);
  line-height: 1.04;
  font-weight: 800;
  max-width: 760px;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(29px, 4vw, 48px);
  line-height: 1.16;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.lead {
  max-width: 680px;
  margin-bottom: 32px;
  font-size: 18px;
  color: rgba(255, 255, 255, 0.88);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 700;
}

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

.button.ghost {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.58);
}

.hero-stats {
  position: absolute;
  right: clamp(18px, 5vw, 72px);
  bottom: 34px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
  max-width: 520px;
}

.hero-stats span {
  min-width: 142px;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(12px);
}

.hero-stats b {
  margin-right: 6px;
  font-size: 28px;
  line-height: 1;
}

.section {
  padding: clamp(76px, 9vw, 128px) clamp(20px, 5vw, 76px);
}

.section-title {
  max-width: 900px;
  margin: 0 auto 36px;
}

.section-title p:not(.eyebrow) {
  max-width: 760px;
  color: var(--muted);
  font-size: 17px;
}

.intro-grid,
.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.86fr) minmax(320px, 1.14fr);
  gap: clamp(22px, 4vw, 54px);
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
}

.text-panel {
  padding: clamp(24px, 4vw, 42px);
  border-left: 4px solid var(--leaf);
  background: rgba(255, 255, 255, 0.54);
}

.text-panel p,
.journey-card p,
.space-item p {
  color: var(--muted);
}

.image-frame,
.image-card,
.mini-image,
.gallery-item,
.board-preview {
  overflow: hidden;
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.image-frame img,
.image-card img,
.mini-image img,
.gallery-item img,
.board-preview img {
  height: 100%;
  object-fit: cover;
  transition: transform 420ms ease;
}

.image-frame figcaption {
  padding: 12px 16px 16px;
  color: var(--muted);
  font-size: 13px;
  background: #fff;
}

.band {
  background: var(--mist);
}

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

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

.image-card {
  position: relative;
  min-height: 260px;
  padding: 0;
  color: #fff;
  text-align: left;
}

.image-card::after,
.gallery-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(15, 34, 29, 0.68), transparent 58%);
}

.image-card span,
.gallery-item span {
  position: absolute;
  z-index: 1;
  left: 18px;
  right: 18px;
  bottom: 16px;
  font-size: 20px;
  font-weight: 700;
}

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

.mini-image {
  min-height: 210px;
  padding: 0;
}

.split {
  align-items: start;
}

.journey {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1180px;
  margin: 42px auto 0;
}

.journey-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.journey-card img {
  height: 220px;
  object-fit: cover;
}

.journey-card h3,
.journey-card p {
  padding-left: 22px;
  padding-right: 22px;
}

.journey-card h3 {
  margin-top: 20px;
}

.journey-card p {
  margin-bottom: 24px;
}

.space-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto 28px;
}

.space-item {
  display: flex;
  gap: 18px;
  padding: 26px;
  border: 1px solid rgba(47, 107, 79, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.64);
}

.number {
  flex: 0 0 auto;
  color: var(--clay);
  font-size: 24px;
  font-weight: 800;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 260px;
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.gallery-item {
  position: relative;
  padding: 0;
  color: #fff;
  text-align: left;
}

.gallery-item.large,
.gallery-video-card.large {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-video-card {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: #10231d;
  box-shadow: var(--shadow);
}

.gallery-video-card video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-video-card span {
  position: absolute;
  z-index: 1;
  left: 18px;
  bottom: 16px;
  pointer-events: none;
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.42);
}

.board-section {
  background: #f3eadc;
}

.ppt-button {
  margin-top: 10px;
  color: #fff;
  background: var(--water);
}

.board-preview {
  display: block;
  width: min(100%, 980px);
  max-height: 760px;
  margin: 0 auto;
  padding: 0;
}

.board-preview img {
  height: auto;
}

.image-card:hover img,
.mini-image:hover img,
.gallery-item:hover img,
.board-preview:hover img {
  transform: scale(1.04);
}

.footer {
  padding: 28px 20px 34px;
  color: #fff;
  text-align: center;
  background: var(--leaf-dark);
}

.footer p {
  margin: 0;
}

.lightbox {
  position: fixed;
  z-index: 60;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 64px clamp(16px, 4vw, 46px);
  background: rgba(9, 18, 16, 0.86);
}

.lightbox.open {
  display: flex;
}

.lightbox img {
  width: auto;
  max-width: 100%;
  max-height: 100%;
  border-radius: 8px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.45);
}

.lightbox-close {
  position: absolute;
  top: 22px;
  right: 26px;
  width: 44px;
  height: 44px;
  color: #fff;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  font-size: 32px;
  line-height: 1;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 640ms ease, transform 640ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }

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

  .hero {
    min-height: 860px;
    padding-top: 180px;
  }

  .hero-stats {
    left: 22px;
    right: 22px;
    justify-content: flex-start;
  }

  .intro-grid,
  .split,
  .cards.three,
  .basis-grid,
  .journey,
  .space-list,
  .form-grid,
  .gallery {
    grid-template-columns: 1fr;
  }

  .gallery {
    grid-auto-rows: 240px;
  }

  .gallery-item.large {
    grid-column: span 1;
    grid-row: span 1;
  }
}

@media (max-width: 560px) {
  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .hero {
    min-height: 820px;
    padding-left: 18px;
    padding-right: 18px;
  }

  h1 {
    font-size: 40px;
  }

  .hero-stats span {
    width: 100%;
  }

  .section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .space-item {
    flex-direction: column;
  }
}