:root {
  --bg: #f4f5ee;
  --surface: #ffffff;
  --line: #d9dccb;
  --ink: #152018;
  --ink-muted: #4f5c50;
  --accent: #0f7b6d;
  --accent-strong: #0b5f54;
  --radius-lg: 18px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 10%, rgba(15, 123, 109, 0.14), transparent 32%),
    radial-gradient(circle at 85% 0%, rgba(237, 143, 49, 0.12), transparent 30%),
    var(--bg);
}

a,
button {
  -webkit-tap-highlight-color: transparent;
}

.container {
  width: min(920px, calc(100vw - 24px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(244, 245, 238, 0.92);
  border-bottom: 1px dashed rgba(217, 220, 203, 0.95);
  backdrop-filter: blur(6px);
}

.topbar-wrap {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.back-link {
  text-decoration: none;
  color: var(--accent-strong);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(15, 123, 109, 0.26);
  background: rgba(15, 123, 109, 0.08);
}

.page-tag {
  color: var(--ink-muted);
  font-size: 0.84rem;
}

.detail-main {
  padding: 16px 0 24px;
  display: grid;
  gap: 12px;
}

.hero,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.eyebrow {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.8rem;
  font-weight: 600;
}

h1 {
  margin: 8px 0 10px;
  font-size: clamp(1.45rem, 5.8vw, 2rem);
  line-height: 1.2;
}

h2 {
  margin: 0;
  font-size: 1.08rem;
}

.action-row {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.buy-btn {
  text-decoration: none;
  border-radius: 11px;
  border: 1px solid rgba(11, 95, 84, 0.35);
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #f4faf8;
  font-weight: 600;
  padding: 9px 14px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ghost-link {
  text-decoration: none;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: #f3f2e8;
  color: var(--ink);
  font-weight: 600;
  padding: 9px 14px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

p {
  margin: 8px 0 0;
  color: var(--ink-muted);
}

ul,
ol {
  margin: 10px 0 0;
  padding-left: 18px;
}

li + li {
  margin-top: 6px;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.kv {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.kv div {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 8px;
  font-size: 0.92rem;
}

.kv dt {
  color: var(--ink-muted);
}

.kv dd {
  margin: 0;
}

.feature-box {
  margin-top: 10px;
  border: 1px dashed rgba(15, 123, 109, 0.35);
  border-radius: var(--radius-md);
  background: #f9faf4;
  padding: 10px;
}

.feature-box [hidden] {
  display: none !important;
}

.feature-box img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: min(56vh, 620px);
  margin: 0 auto;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  object-fit: contain;
}

.feature-box img.is-zoomable {
  cursor: zoom-in;
}

.feature-box img.is-zoomable:focus-visible {
  outline: 2px solid rgba(15, 123, 109, 0.35);
  outline-offset: 4px;
}

.img-empty {
  border-radius: 10px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #f1f3e8);
  min-height: 180px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 14px;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.note {
  border-radius: var(--radius-md);
  border: 1px solid rgba(15, 123, 109, 0.3);
  background: rgba(15, 123, 109, 0.08);
  color: var(--ink);
  padding: 12px 14px;
  font-size: 0.9rem;
}

.detail-anchor {
  display: none;
}

body.has-image-preview {
  overflow: hidden;
}

.image-preview {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 18px;
}

.image-preview[hidden] {
  display: none !important;
}

.image-preview-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(21, 32, 24, 0.72);
  backdrop-filter: blur(4px);
}

.image-preview-dialog {
  position: relative;
  z-index: 1;
  width: min(92vw, 1400px);
  max-height: 88vh;
  padding: 14px;
  border-radius: 18px;
  border: 1px solid rgba(217, 220, 203, 0.35);
  background: rgba(244, 245, 238, 0.98);
  box-shadow: 0 18px 48px rgba(21, 32, 24, 0.24);
}

.image-preview-close {
  appearance: none;
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  min-width: 42px;
  min-height: 42px;
  border: 1px solid rgba(15, 123, 109, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
}

.image-preview-close:focus-visible {
  outline: 2px solid rgba(15, 123, 109, 0.35);
  outline-offset: 2px;
}

.image-preview img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: calc(88vh - 28px);
  margin: 0 auto;
  border-radius: 12px;
  object-fit: contain;
  background: #fff;
}

@media (min-width: 760px) {
  .container {
    width: min(920px, calc(100vw - 40px));
  }

  .detail-main {
    padding-top: 20px;
  }

  .hero,
  .card {
    padding: 18px;
  }

  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}