:root {
  --color-bg: #ffffff;
  --color-text: #1f2a1f;
  --color-subtle: #5b6b5c;
  --color-accent: #dff1e3;
  --color-accent-strong: #4f8a5b;
  --color-card: #ffffff;
  --color-border: #e8eee9;
  --color-shadow: 0 10px 30px rgba(31, 42, 31, 0.08);
  --radius-large: 18px;
  --radius-medium: 12px;
  --radius-small: 8px;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --content-width: 1120px;
  --transition-fast: 180ms ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Noto Sans SC", "PingFang SC", "Segoe UI", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

.site-shell {
  width: min(100% - 2rem, var(--content-width));
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-xl);
  padding-block: var(--space-xl);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.site-title {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: 0.01em;
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: #f7faf8;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3rem;
}

.language-button {
  border: 0;
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  font-size: 0.9rem;
  cursor: pointer;
  background: transparent;
  color: var(--color-subtle);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.language-button[aria-pressed="true"] {
  background: var(--color-accent);
  color: var(--color-text);
}

.plants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.preview-helper {
  grid-column: 1 / -1;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  padding: var(--space-xl);
  background: #fafdfb;
  box-shadow: var(--color-shadow);
}

.preview-helper h2 {
  margin: 0 0 var(--space-sm);
}

.preview-helper p {
  margin: 0;
  color: var(--color-subtle);
}

.preview-helper-button {
  margin-top: var(--space-md);
  border: 0;
  border-radius: 999px;
  padding: 0.65rem 1rem;
  background: var(--color-accent);
  color: var(--color-text);
  font-weight: 600;
  cursor: pointer;
}

.preview-helper-feedback {
  margin-top: var(--space-sm) !important;
  color: #b54747 !important;
}

.plant-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  box-shadow: var(--color-shadow);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.plant-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(31, 42, 31, 0.12);
}

.card-image-wrapper {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #f3f6f4;
  overflow: hidden;
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-bottom: 1px solid var(--color-border);
  cursor: zoom-in;
  transition: transform var(--transition-fast);
}

.plant-card:hover .card-image {
  transform: scale(1.03);
}

.sold-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: #1f2a1f;
  color: #ffffff;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-small);
  font-size: 0.8rem;
  font-weight: 600;
}

.card-thumbnails {
  display: flex;
  gap: 0.45rem;
  padding: var(--space-sm) var(--space-sm) 0;
}

.card-thumbnail-button {
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  padding: 0;
  background: transparent;
  width: 3.1rem;
  height: 3.1rem;
  cursor: pointer;
  overflow: hidden;
  flex: 0 0 auto;
}

.card-thumbnail-button.is-active {
  border-color: var(--color-accent-strong);
  box-shadow: 0 0 0 2px rgba(79, 138, 91, 0.18);
}

.card-thumbnail-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-content {
  padding: var(--space-lg);
}

.plant-name {
  margin: 0;
  font-size: 1.2rem;
}

.plant-price {
  margin: var(--space-xs) 0 var(--space-md);
  color: var(--color-accent-strong);
  font-weight: 700;
}

.plant-description {
  margin: 0 0 var(--space-md);
  color: var(--color-subtle);
}

.plant-meta {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.35rem;
}

.meta-label {
  font-weight: 600;
  margin-right: 0.25rem;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
  color: var(--color-subtle);
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  margin-top: var(--space-sm);
}

.site-footer a {
  color: var(--color-accent-strong);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.contact-email-button {
  display: inline-block;
  margin-left: 0.45rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: var(--color-accent);
  border: 1px solid #cfe6d5;
  color: #224028;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-email-button:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(31, 42, 31, 0.12);
}

.contact-email-button:focus-visible {
  outline: 2px solid var(--color-accent-strong);
  outline-offset: 2px;
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(15, 20, 15, 0.84);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  z-index: 1000;
}

.lightbox.open {
  display: flex;
}

.lightbox-image {
  margin: 0 auto;
  max-width: min(92vw, 1000px);
  max-height: 88vh;
  border-radius: var(--radius-medium);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
}

.lightbox-close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 2.2rem;
  height: 2.2rem;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: #253025;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100% - 1.2rem, var(--content-width));
    padding-block: var(--space-lg);
    gap: var(--space-lg);
  }

  /* 手机端改为两列，避免一屏只看到一棵植物。 */
  .plants-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-md);
  }

  .card-content {
    padding: var(--space-md);
  }

  .card-thumbnails {
    padding: var(--space-xs) var(--space-xs) 0;
    gap: 0.35rem;
  }

  .card-thumbnail-button {
    width: 2.6rem;
    height: 2.6rem;
  }

  .plant-name {
    font-size: 1.05rem;
  }

  .plant-price,
  .plant-description,
  .plant-meta {
    font-size: 0.9rem;
  }
}

@media (max-width: 420px) {
  .site-shell {
    width: min(100% - 0.8rem, var(--content-width));
  }

  .card-content {
    padding: 0.85rem;
  }

  .contact-email-button {
    margin-left: 0;
    margin-top: 0.45rem;
  }
}