:root {
  --forest: #163b2d;
  --leaf: #2f7d52;
  --moss: #d7e7c6;
  --sun: #f2b84b;
  --ink: #14211b;
  --muted: #5d6f66;
  --paper: #f7f5ee;
  --white: #ffffff;
  --line: rgba(20, 33, 27, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 56px);
  color: var(--white);
  background: linear-gradient(180deg, rgba(12, 28, 22, 0.82), rgba(12, 28, 22, 0));
}

.brand {
  font-size: 18px;
  font-weight: 800;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  opacity: 0.88;
}

.nav-links a:hover {
  opacity: 1;
}

.hero {
  min-height: 92vh;
  display: flex;
  align-items: end;
  padding: 120px clamp(20px, 6vw, 84px) 72px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(9, 31, 23, 0.84) 0%, rgba(9, 31, 23, 0.52) 46%, rgba(9, 31, 23, 0.14) 100%),
    url("https://images.unsplash.com/photo-1535338454770-8be927b5a00b?auto=format&fit=crop&w=1800&q=82") center / cover;
}

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

.eyebrow {
  margin: 0 0 14px;
  color: var(--sun);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 86px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 680px;
  margin-bottom: 32px;
  font-size: clamp(17px, 2.3vw, 22px);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.9);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 6px;
  font-weight: 800;
}

.button.primary {
  color: #163226;
  background: var(--sun);
  border-color: var(--sun);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.section {
  padding: 76px clamp(20px, 6vw, 84px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2,
.action-copy h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.12;
}

.intro-section {
  background: var(--paper);
}

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

.intro-grid article {
  min-height: 230px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.number {
  display: block;
  margin-bottom: 34px;
  color: var(--leaf);
  font-size: 14px;
  font-weight: 900;
}

.intro-grid h3,
.animal-card h3 {
  margin-bottom: 12px;
  font-size: 24px;
}

.intro-grid p,
.animal-card p,
.action-copy p,
.site-footer p {
  color: var(--muted);
  line-height: 1.75;
}

.animals-section {
  color: var(--white);
  background: var(--forest);
}

.animals-section .section-heading h2 {
  color: var(--white);
}

.animal-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.animal-card {
  overflow: hidden;
  border-radius: 8px;
  background: #fdfcf6;
  color: var(--ink);
}

.animal-card img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.card-body {
  padding: 24px;
}

.status {
  margin-bottom: 10px;
  color: var(--leaf);
  font-size: 13px;
  font-weight: 900;
}

.action-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
  background: linear-gradient(180deg, var(--moss), #eef3df);
}

.action-list {
  display: grid;
  gap: 14px;
}

.action-list label {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 14px;
  align-items: start;
  padding: 18px 20px;
  border: 1px solid rgba(22, 59, 45, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  font-weight: 700;
  line-height: 1.55;
}

.action-list input {
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  accent-color: var(--leaf);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 6vw, 84px);
  color: var(--white);
  background: #10251d;
}

.site-footer p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer a {
  font-weight: 800;
  white-space: nowrap;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding-top: 16px;
  }

  .hero {
    min-height: 88vh;
    padding-top: 140px;
    background-position: 58% center;
  }

  .intro-grid,
  .animal-grid,
  .action-section {
    grid-template-columns: 1fr;
  }

  .animal-card img {
    height: 260px;
  }
}

@media (max-width: 560px) {
  .nav-links {
    width: 100%;
    justify-content: space-between;
    gap: 8px;
    font-size: 13px;
  }

  .hero {
    min-height: 94vh;
    padding-bottom: 42px;
  }

  h1 {
    font-size: 40px;
  }

  .section {
    padding-block: 56px;
  }

  .intro-grid article {
    min-height: auto;
  }

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