:root {
  color-scheme: light;
  font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  background: #f6f7fb;
  color: #1f2937;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .92), rgba(246, 247, 251, .96)),
    var(--bg, none);
}

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

button,
input,
textarea,
select {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px min(5vw, 56px);
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid #e5e7eb;
  backdrop-filter: blur(14px);
}

.brand {
  font-size: 20px;
  font-weight: 800;
  color: var(--theme);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: #4b5563;
}

nav a:hover,
.product h3 a:hover {
  color: var(--theme);
}

.page {
  width: min(1120px, calc(100% - 28px));
  margin: 22px auto 36px;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px;
  color: #fff;
  background: linear-gradient(135deg, var(--theme), #0f766e);
  border-radius: 8px;
  box-shadow: 0 18px 46px rgba(15, 23, 42, .12);
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 30px;
}

.hero p,
.notice p,
.product p,
.muted {
  color: #6b7280;
}

.hero p {
  margin: 0;
  color: rgba(255, 255, 255, .86);
}

.grid {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.grid.two {
  grid-template-columns: 1.2fr .8fr;
}

.grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.panel {
  padding: 20px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, .05);
}

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

.notice {
  padding: 12px 0;
  border-top: 1px solid #eef2f7;
}

.notice:first-of-type {
  border-top: 0;
}

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

.chips a,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 11px;
  border-radius: 999px;
  background: #eef2ff;
  color: #334155;
}

.chips a.active {
  background: var(--theme);
  color: #fff;
}

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

.product {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  gap: 14px;
  padding: 16px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

.product h3 {
  margin: 10px 0 8px;
}

.buybox {
  display: grid;
  align-content: center;
  gap: 8px;
  text-align: right;
}

.buybox b,
.price {
  color: #dc2626;
  font-size: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 16px;
  border: 0;
  border-radius: 6px;
  background: var(--theme);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

.btn.secondary {
  background: #0f766e;
}

.btn.light {
  background: #fff;
  color: var(--theme);
}

.form-panel {
  max-width: 680px;
  margin-inline: auto;
}

form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: #374151;
}

input,
textarea,
select {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  background: #fff;
}

textarea {
  min-height: 100px;
  resize: vertical;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check input {
  width: auto;
  min-height: 0;
}

.line,
.row,
.pay-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto auto auto;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid #eef2f7;
}

.line {
  grid-template-columns: minmax(0, 1fr) auto;
}

.line small,
.row small {
  display: block;
  margin-top: 4px;
  color: #6b7280;
}

.admin-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.admin-nav a,
.admin-nav button {
  padding: 8px 12px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}

.head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.product-head {
  align-items: flex-start;
}

.search-form {
  display: grid;
  grid-template-columns: minmax(180px, 280px) auto auto;
  gap: 8px;
}

.stat b {
  display: block;
  margin-top: 8px;
  font-size: 28px;
  color: var(--theme);
}

.stat.warn b {
  color: #dc2626;
}

.cards {
  white-space: pre-wrap;
  padding: 14px;
  border-radius: 8px;
  background: #111827;
  color: #f9fafb;
}

.amount-box {
  display: grid;
  gap: 6px;
  padding: 12px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #f8fafc;
}

.amount-box b {
  color: #dc2626;
}

.footer {
  padding: 24px;
  text-align: center;
  color: #6b7280;
}

code {
  padding: 2px 6px;
  border-radius: 4px;
  background: #eef2ff;
}

@media (max-width: 760px) {
  .topbar,
  .hero,
  .head {
    align-items: flex-start;
    flex-direction: column;
  }

  .grid.two,
  .grid.three,
  .product,
  .line,
  .row,
  .pay-row {
    grid-template-columns: 1fr;
  }

  .buybox {
    text-align: left;
  }

  .search-form {
    width: 100%;
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 24px;
  }
}