/* Pingzhou Trading - company site for SP-API private developer application.
   Trust-first, light theme locked. One accent color, one radius scale (8px). */

:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --ink: #1b1f24;
  --muted: #55606c;
  --line: #e5e8ec;
  --accent: #0f5ea8;
  --accent-deep: #0c4b88;
  --radius: 8px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent); }
a:hover { color: var(--accent-deep); }

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  row-gap: 8px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16.5px;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 16px;
  height: 16px;
  border-radius: 5px;
  background: var(--accent);
}

.site-header nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 22px;
}

.site-header nav a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--ink);
}

/* Hero */

.hero {
  padding: 72px 0 64px;
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.12;
  max-width: 660px;
}

.hero-sub {
  margin: 0 0 30px;
  font-size: 18px;
  color: var(--muted);
  max-width: 58ch;
}

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s ease, transform 0.05s ease;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-deep);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(1px);
}

/* Sections */

.section {
  padding: 72px 0;
  border-top: 1px solid var(--line);
}

.section-soft {
  background: var(--bg-soft);
}

.section h2 {
  margin: 0 0 28px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.012em;
}

/* About: text + facts */

.split {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 56px;
  align-items: start;
}

.split-main p {
  margin: 0 0 16px;
  color: var(--muted);
  max-width: 62ch;
}

.split-main p:last-child { margin-bottom: 0; }

.facts { margin: 0; }

.fact {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.fact:first-child { border-top: none; padding-top: 4px; }

.fact dt {
  font-size: 13.5px;
  color: var(--muted);
}

.fact dd {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
}

/* What we do: rows */

.rows {
  list-style: none;
  margin: 0;
  padding: 0;
}

.row {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.row:first-child { border-top: none; padding-top: 0; }

.row h3 {
  margin: 0 0 6px;
  font-size: 17.5px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.row p {
  margin: 0;
  color: var(--muted);
  font-size: 15.5px;
  max-width: 62ch;
}

/* SP-API note */

.note {
  background: var(--bg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 32px;
}

.note h2 { margin-bottom: 14px; }

.note p {
  margin: 0;
  color: var(--muted);
  max-width: 68ch;
}

/* Contact */

.contact-facts { max-width: 640px; }

.contact-note {
  margin-top: 22px;
  font-size: 14px;
  color: var(--muted);
}

/* Legal pages */

.legal { padding: 64px 0 88px; }

.legal .container { max-width: 760px; }

.legal h1 {
  margin: 0 0 8px;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.legal-meta {
  margin: 0 0 32px;
  font-size: 14px;
  color: var(--muted);
}

.legal h2 {
  margin: 34px 0 10px;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.legal p {
  margin: 0 0 12px;
  color: var(--muted);
}

.legal ul {
  margin: 0 0 12px;
  padding-left: 22px;
  color: var(--muted);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 26px 0;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
  color: var(--muted);
}

.footer-row nav {
  display: flex;
  gap: 20px;
}

.footer-row nav a {
  color: var(--muted);
  text-decoration: none;
}

.footer-row nav a:hover { color: var(--ink); }

/* Focus visibility */

a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Mobile */

@media (max-width: 760px) {
  .hero { padding: 48px 0 48px; }

  .hero-sub { font-size: 16.5px; }

  .section { padding: 56px 0; }

  .split { grid-template-columns: 1fr; gap: 32px; }

  .site-header nav { gap: 16px; }
  .site-header nav a { font-size: 13.5px; }

  .fact { grid-template-columns: 110px 1fr; }

  .note { padding: 22px 20px; }
}