:root {
  --came: #1a6f7c;
  --pink: #e84b8a;
  --bg: #f4efe8;
  --ink: #222;
  --muted: #5c5c5c;
  --line: #e4ddd4;
  --card: #fff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--came); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }

.top {
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  min-height: 72px;
  height: auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 16px;
  padding: 10px 22px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.plate { background: transparent; padding: 0; display: block; }
.plate img { height: 28px; width: auto; display: block; }

.titles { display: flex; flex-direction: column; line-height: 1.2; }
.titles b { font-size: 20px; font-weight: 800; color: #1a1a1a; }
.titles span { font-size: 13px; color: var(--came); }

nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-left: auto;
  font-size: 14px;
  font-weight: 600;
}
nav a { color: var(--ink); }
nav a:hover, nav a.active { color: var(--came); text-decoration: none; }

.buy {
  color: #fff !important;
  background: var(--pink);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}
.buy:hover { background: #d63d79; text-decoration: none; }

.lang {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #f8f6f2;
}
.lang a {
  color: var(--muted);
  padding: 8px 14px;
  text-decoration: none;
}
.lang a.on, .lang a:hover {
  color: #fff;
  background: var(--came);
  text-decoration: none;
}

.note {
  margin: 0 0 16px;
  padding: 10px 14px;
  border-left: 4px solid var(--came);
  background: #fff;
  border-radius: 0 8px 8px 0;
  color: var(--muted);
  font-size: 14px;
}

.sku-card .sku-shop {
  display: inline-block;
  margin-top: 14px;
  padding: 8px 12px;
  border-radius: 8px;
  background: #eef6f7;
  font-size: 13px;
  font-weight: 700;
}
.sku-card .sku-shop:hover { text-decoration: none; background: #dceef1; }

.hero { padding: 48px 0 32px; background: var(--bg); }
.kicker { color: var(--came); font-size: 13px; }
h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.15;
  color: #1a1a1a;
  margin: 8px 0 14px;
}
.lead { font-size: 18px; color: var(--muted); max-width: 720px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
  background: #fff;
}
.btn:hover { text-decoration: none; border-color: var(--came); }
.btn-primary {
  background: var(--pink);
  color: #fff;
  border-color: var(--pink);
}
.btn-primary:hover { background: #d63d79; }

section { padding: 40px 0; border-top: 1px solid var(--line); }
h2 { font-size: 22px; font-weight: 800; color: #1a1a1a; margin: 0 0 16px; }
h3 { font-size: 18px; font-weight: 700; margin: 28px 0 10px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); }
strong { color: #1a1a1a; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}
.card strong { display: block; margin-bottom: 6px; }

.board-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}
.board-fig {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}
.board-fig img {
  width: 100%;
  height: auto;
  display: block;
  background: #ece8e2;
  border-radius: 8px;
}
.board-fig figcaption {
  margin-top: 10px;
  font-size: 14px;
  color: var(--muted);
}
.frame-fig img {
  width: 100%;
  height: auto;
  display: block;
  background: #1a1a1a;
  border-radius: 8px;
}
.pair-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
@media (max-width: 1000px) {
  .pair-grid { grid-template-columns: 1fr; }
}

.sku-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.sku-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 18px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}
.sku-card .sku {
  font-family: Consolas, "SF Mono", Menlo, monospace;
  font-size: 14px;
  font-weight: 700;
  color: var(--came);
  letter-spacing: 0.02em;
}
.sku-card h3 { margin: 8px 0 12px; }
.sku-card dl {
  margin: 0;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 5px 10px;
  font-size: 14px;
}
.sku-card dt { color: var(--muted); }
.sku-card dd { margin: 0; }
@media (max-width: 1000px) {
  .sku-grid { grid-template-columns: 1fr; }
}
.callout {
  border-left: 4px solid var(--pink);
  padding: 12px 16px;
  background: #fff;
  border-radius: 0 10px 10px 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

table { width: 100%; border-collapse: collapse; font-size: 15px; background: #fff; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

pre, code {
  font-family: Consolas, "SF Mono", Menlo, monospace;
  font-size: 13.5px;
}
pre {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  overflow: auto;
  color: #222;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.foot {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
  background: #fff;
}
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }

@media (max-width: 900px) {
  .brand { height: auto; min-height: 72px; flex-wrap: wrap; padding: 12px 22px; }
  nav { margin-left: 0; width: 100%; }
}

.steps { display: grid; gap: 16px; }
.step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 24px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}
.step-num {
  color: var(--came);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.step h2 { margin: 6px 0 12px; }
.step ol { margin: 0 0 14px; padding-left: 20px; }
.step select {
  display: block;
  width: min(420px, 100%);
  margin: 8px 0 14px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font: 15px/1.3 "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}
.pkg-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  margin-top: 8px;
}
.file-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 4px 0 12px;
}
.file-row input[type="file"] { display: none; }
.file-btn {
  display: inline-block;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 18px;
  font: 700 14px/1.2 "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  cursor: pointer;
}
.file-btn:hover { border-color: var(--came); }
.step-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 8px 0 0; }
.step-actions button,
.tool-actions button {
  background: var(--came);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 10px 18px;
  font: 700 14px/1.2 "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  cursor: pointer;
}
.step-actions button.primary,
.tool-actions button.primary { background: var(--pink); }
.step-actions button.primary:hover,
.tool-actions button.primary:hover { background: #d63d79; }
.step-actions button:hover,
.tool-actions button:hover { filter: brightness(1.05); }
.step-actions button:disabled,
.tool-actions button:disabled { opacity: 0.45; cursor: not-allowed; filter: none; }

.pill {
  display: inline-block;
  border-radius: 8px;
  padding: 6px 10px;
  font: 12px Consolas, monospace;
  margin-right: 8px;
  background: rgba(255, 255, 255, 0.88);
  color: #222;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}
.pill.ok { color: var(--came); }
.pill.bad { color: #c0392b; }

#log {
  min-height: 280px;
  max-height: 640px;
}