:root {
  --background: #ffffff;
  --foreground: #111111;
  --muted: #686868;
  --line: #ececec;
  --panel: #f8f8f8;
  --shadow: 0 20px 40px rgba(17, 17, 17, 0.06);
  --radius-lg: 28px;
  --radius-md: 20px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--background);
  color: var(--foreground);
  font-family:
    "PingFang SC",
    "Hiragino Sans GB",
    "Noto Sans SC",
    "Microsoft YaHei",
    sans-serif;
}

body {
  min-height: 100vh;
}

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

a,
button,
input {
  font: inherit;
}

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

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
}

.page {
  width: min(100%, 520px);
  margin: 0 auto;
  padding: 24px 18px 40px;
}

.brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
}

.brand-mark {
  font-size: 0.75rem;
  letter-spacing: 0.32em;
  color: var(--muted);
}

.brand-link {
  font-size: 0.9rem;
  color: var(--muted);
}

.hero,
.product-card,
.state-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow);
}

.hero {
  padding: 28px 22px;
}

.eyebrow {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.title {
  margin: 14px 0 12px;
  font-size: 2rem;
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.8;
}

.search-card,
.quick-card {
  margin-top: 18px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.search-label,
.quick-title {
  margin: 0 0 12px;
  font-size: 0.95rem;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.search-input {
  width: 100%;
  height: 48px;
  border: 1px solid #d9d9d9;
  border-radius: 14px;
  padding: 0 14px;
  background: #fff;
}

.primary-button,
.secondary-button,
.quick-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 14px;
  border: 1px solid #111111;
  padding: 0 18px;
}

.primary-button {
  background: #111111;
  color: #ffffff;
}

.secondary-button,
.quick-link {
  background: #ffffff;
  color: #111111;
}

.quick-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.product-card,
.state-card {
  overflow: hidden;
}

.product-image-wrap {
  padding: 12px;
  background: #fafafa;
  border-top: 1px solid var(--line);
}

.product-image {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 22px;
  background: #f2f2f2;
}

.product-image-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 1rem;
}

.product-body {
  padding: 20px 18px 24px;
}

.product-image-wrap-bottom {
  margin-top: 4px;
}

.product-thumbs {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.product-thumb {
  flex: 0 0 76px;
  width: 76px;
  height: 96px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #ffffff;
  overflow: hidden;
}

.product-thumb-active {
  border-color: #111111;
}

.product-thumb-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-code {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
}

.product-name {
  margin: 14px 0 18px;
  font-size: 1.7rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.detail-list {
  display: grid;
  gap: 14px;
  margin: 0;
}

.detail-row {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  align-items: start;
}

.detail-label {
  color: var(--muted);
  font-size: 0.92rem;
}

.detail-value {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
}

.product-actions,
.state-actions {
  display: flex;
  gap: 10px;
  margin-top: 24px;
}

.product-actions > a,
.state-actions > a {
  flex: 1;
}

.state-card {
  padding: 28px 22px;
}

.state-title {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.state-text {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.footer-note {
  margin-top: 20px;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

@media (min-width: 768px) {
  .page {
    padding: 36px 24px 56px;
  }

  .title {
    font-size: 2.6rem;
  }

  .product-name {
    font-size: 2.1rem;
  }
}