*, *::before, *::after { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif;
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  color: #1a1a1a;
  line-height: 1.7;
  background: #fff;
}
.back { font-size: 0.85rem; margin-bottom: 32px; }
.back a { color: #007aff; text-decoration: none; }
.back a:hover { text-decoration: underline; }
.app-header { display: flex; align-items: center; gap: 16px; margin-bottom: 8px; }
.app-icon { width: 64px; height: 64px; border-radius: 16px; overflow: hidden; background: #e0e0e0; flex-shrink: 0; }
.app-icon img { width: 100%; height: 100%; object-fit: cover; display: block; }
h1 { font-size: 1.6rem; margin: 0 0 4px; }
.app-tagline { color: #666; font-size: 0.9rem; margin: 0; }
.btn-appstore {
  display: inline-block;
  background: #1a1a1a;
  color: #fff !important;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: 10px;
  text-decoration: none;
  margin: 16px 0 0;
}
.btn-appstore:hover { background: #333; }
hr { border: none; border-top: 1px solid #e0e0e0; margin: 40px 0; }
h2 { font-size: 1.1rem; color: #333; margin-top: 0; }
.contact-box {
  background: #f5f5f7;
  border-radius: 12px;
  padding: 24px;
  margin: 16px 0;
}
.contact-box p { margin: 0 0 12px; }
.contact-link {
  display: inline-block;
  background: #007aff;
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}
.reply-note { font-size: 0.9rem; color: #555; margin-top: 12px !important; }
.faq-item { margin-bottom: 2em; }
.faq-item h2 { font-size: 1rem; color: #1a1a1a; margin-bottom: 4px; }
.faq-item p { margin: 0; color: #444; }
footer { font-size: 0.82rem; color: #aaa; text-align: center; margin-top: 60px; }
footer a { color: #aaa; }