:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1a1a2e;
  --muted: #6b7280;
  --accent: #e94560;
  --accent-dark: #c23a51;
  --radius: 16px;
  --shadow: 0 8px 32px rgba(17, 20, 32, 0.08);
  --max: 720px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    'PingFang SC',
    'Microsoft YaHei',
    'Helvetica Neue',
    Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 20px 48px;
}

header.hero {
  text-align: center;
  padding: 40px 0 32px;
}

.brand-avatar {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1f2340 0%, #3d4269 100%);
  color: #fff;
  font-size: 28px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.75rem;
  font-weight: 700;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 22px;
  margin-bottom: 20px;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: var(--text);
}

.card p {
  margin: 0 0 12px;
  color: #374151;
  font-size: 0.95rem;
}

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

.lead {
  font-size: 1rem;
  color: #374151;
}

.tagline {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(233, 69, 96, 0.1);
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 600;
}

.qr-block {
  text-align: center;
}

.qr-block .hint {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0 0 16px;
}

.qr-frame {
  display: inline-block;
  padding: 16px;
  background: #fafafa;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
}

.qr-frame img {
  display: block;
  width: 200px;
  height: 200px;
  object-fit: contain;
}

.qr-fallback {
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.5;
}

.steps {
  margin: 0;
  padding-left: 1.2em;
  color: #374151;
  font-size: 0.92rem;
}

.steps li {
  margin-bottom: 8px;
}

.links-grid {
  display: grid;
  gap: 10px;
}

.links-grid a {
  display: block;
  padding: 14px 16px;
  border-radius: 12px;
  background: #fafafa;
  border: 1px solid #e5e7eb;
  color: var(--text);
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}

.links-grid a:hover {
  border-color: var(--accent);
  background: #fff5f6;
  text-decoration: none;
}

.links-grid a span {
  display: block;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--muted);
  margin-top: 4px;
}

footer.site-footer {
  text-align: center;
  padding: 32px 16px;
  font-size: 0.8rem;
  color: var(--muted);
}

footer.site-footer p {
  margin: 6px 0;
}

.footer-operator {
  font-size: 0.85rem;
  color: #4b5563;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}

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

.footer-beian a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* Legal pages */
.legal-page .wrap {
  max-width: 800px;
}

.legal-page h1 {
  font-size: 1.5rem;
  text-align: center;
}

.legal-page .date {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.legal-page h2 {
  font-size: 1.05rem;
  margin: 24px 0 10px;
  color: #111827;
}

.legal-page p,
.legal-page li {
  font-size: 0.95rem;
  color: #374151;
  margin: 0 0 10px;
}

.legal-page ul {
  margin: 0 0 12px;
  padding-left: 1.2em;
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 0.92rem;
}

.sub {
  padding-left: 0.5em;
}

@media (min-width: 640px) {
  .wrap {
    padding: 32px 24px 56px;
  }

  header.hero {
    padding: 56px 0 40px;
  }

  h1 {
    font-size: 2rem;
  }
}