:root {
  --green: #15803d; --green-dark: #166534; --green-light: #dcfce7;
  --teal: #0f766e; --bg: #f0fdf4; --text: #1f2937; --muted: #4b5563;
  --white: #fff; --border: #bbf7d0; --shadow: 0 8px 24px rgba(21, 128, 61, 0.08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text); background: var(--bg); line-height: 1.7;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1100px, 92%); margin: 0 auto; }
.site-header {
  background: var(--white); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .75rem 0; }
.logo { display: flex; align-items: center; gap: .6rem; color: var(--green-dark); font-weight: 700; text-decoration: none; }
.logo img { width: 2.2rem; height: 2.2rem; border-radius: .55rem; object-fit: cover; }
.logo-text { font-size: .95rem; }
.site-nav { display: flex; flex-wrap: wrap; gap: .35rem .9rem; }
.site-nav a { color: var(--muted); font-size: .92rem; padding: .25rem 0; }
.site-nav a.active, .site-nav a:hover { color: var(--green); font-weight: 600; text-decoration: none; }
.nav-toggle { display: none; background: var(--green); color: #fff; border: 0; border-radius: .4rem; padding: .4rem .7rem; font-size: 1.1rem; }
.hero {
  background: linear-gradient(135deg, #15803d, #0f766e 55%, #065f46);
  color: #fff; padding: 3.5rem 0 3rem; text-align: center;
}
.hero h1 { margin: 0 0 .5rem; font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: .04em; }
.hero p { margin: 0; opacity: .95; font-size: 1.15rem; }
.page-hero {
  background: linear-gradient(135deg, #15803d, #0f766e);
  color: #fff; padding: 2rem 0 1.6rem;
}
.page-hero h1 { margin: .4rem 0 0; font-size: clamp(1.5rem, 3vw, 2rem); }
.page-hero .back { color: #ecfdf5; font-size: .95rem; }
.section { padding: 2.5rem 0; }
.section.alt { background: var(--white); }
.section h2 { color: var(--green-dark); margin: 0 0 1.2rem; font-size: 1.55rem; text-align: center; }
.section h3 { color: var(--green); margin: 1rem 0 .5rem; }
.cards-2, .cards-3, .cards-4 { display: grid; gap: 1.2rem; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--white); border: 1px solid var(--border); border-radius: .85rem;
  padding: 1.25rem; box-shadow: var(--shadow);
}
.card.center { text-align: center; }
.card h3 { margin-top: 0; color: var(--green-dark); }
.card-thumb {
  width: 100%; height: 140px; object-fit: cover; border-radius: .6rem; margin-bottom: .8rem;
  background: linear-gradient(135deg, #bbf7d0, #99f6e4);
}
.thumb-placeholder {
  width: 100%; height: 140px; border-radius: .6rem; margin-bottom: .8rem;
  background: linear-gradient(135deg, #bbf7d0, #99f6e4);
  display: flex; align-items: center; justify-content: center; color: var(--green-dark); font-weight: 600;
}
.btn {
  display: inline-block; background: var(--green); color: #fff !important; padding: .55rem 1.1rem;
  border-radius: .5rem; font-weight: 600; text-decoration: none !important; border: 0; cursor: pointer;
}
.btn:hover { background: var(--green-dark); }
.prose { max-width: 48rem; margin: 0 auto; color: var(--muted); }
.prose ul { padding-left: 1.2rem; }
.prose li { margin: .35rem 0; }
.species-list { display: grid; gap: 1.25rem; }
.species {
  background: var(--white); border: 1px solid var(--border); border-radius: .85rem;
  padding: 1.25rem 1.4rem; box-shadow: var(--shadow);
}
.species h3 { margin-top: 0; }
.species-grid { display: grid; grid-template-columns: 220px 1fr; gap: 1.2rem; align-items: start; }
.species-photo {
  width: 100%; border-radius: .6rem; object-fit: cover; max-height: 180px;
  background: linear-gradient(135deg, #bbf7d0, #a7f3d0);
}
.toc { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; margin-bottom: 1.5rem; }
.toc a {
  background: var(--green-light); color: var(--green-dark); padding: .35rem .75rem;
  border-radius: 999px; font-size: .9rem; text-decoration: none;
}
.table-wrap { overflow-x: auto; border-radius: .75rem; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; background: #fff; min-width: 560px; }
th { background: var(--green); color: #fff; text-align: left; padding: .85rem 1rem; }
td { padding: .85rem 1rem; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:nth-child(even) td { background: #f7fef9; }
.note { margin-top: 1rem; color: var(--muted); font-size: .95rem; }
.price-box {
  background: #ecfdf5; border: 1px dashed var(--green); border-radius: .75rem;
  padding: 1rem 1.2rem; margin: 1rem 0;
}
.figure { margin: 1rem 0; text-align: center; }
.price-img, .flow-img, .content-img {
  max-width: 100%; height: auto; border-radius: .6rem; box-shadow: var(--shadow);
}
.price-img { max-width: min(720px, 100%); }
.qr-img { width: 128px; height: 128px; object-fit: cover; border-radius: .5rem; margin-top: .5rem; }
.float-qr { width: 96px; height: 96px; object-fit: cover; border-radius: .4rem; display: block; margin: .4rem auto 0; }
.img-placeholder {
  background: linear-gradient(135deg, #bbf7d0, #99f6e4); border-radius: .6rem;
  min-height: 120px; display: flex; align-items: center; justify-content: center;
  color: var(--green-dark); font-weight: 600; padding: 1rem; text-align: center;
}
.about-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 1.5rem; align-items: center; }
.about-photo { width: 100%; border-radius: .85rem; object-fit: cover; max-height: 360px; box-shadow: var(--shadow); }
.contact-section { background: var(--green-light); }
.site-footer {
  background: #1f2937; color: #d1d5db; text-align: center; padding: 2rem 0; font-size: .92rem;
}
.site-footer a { color: #a7f3d0; }
.float-contact { position: fixed; right: 1.1rem; bottom: 1.1rem; z-index: 200; }
.float-btn {
  width: 3.6rem; height: 3.6rem; border-radius: 999px; border: 0;
  background: var(--green); color: #fff; font-weight: 700; box-shadow: 0 8px 20px rgba(21,128,61,.35); cursor: pointer;
}
.float-panel {
  background: #fff; border-radius: .75rem; padding: 1rem; width: 15rem; margin-bottom: .6rem;
  box-shadow: var(--shadow); border: 1px solid var(--border); font-size: .9rem;
}
.float-panel[hidden] { display: none; }
.lead { font-size: 1.05rem; color: var(--muted); }
@media (max-width: 900px) {
  .cards-4, .cards-3 { grid-template-columns: 1fr 1fr; }
  .logo-text { display: none; }
  .species-grid, .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: #fff; flex-direction: column; padding: .8rem 1rem 1rem;
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
  }
  .site-nav.open { display: flex; }
  .cards-2, .cards-3, .cards-4 { grid-template-columns: 1fr; }
  .header-inner { position: relative; }
}