body {
  font-family: Arial, sans-serif;
  max-width: 960px;
  margin: auto;
  padding: 28px 18px;
  background: #071224;
  color: #e5eef8;
  line-height: 1.8;
}
main, header, section {
  background: #0d1b31;
  border: 1px solid #263b58;
  border-radius: 16px;
  padding: 22px;
  margin: 16px 0;
}
main { padding: 12px 22px; }
main section { margin: 16px 0; }
h1 { font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.2; }
h2 { color: #67e8f9; }
h3 { color: #e5eef8; }
a { color: #67e8f9; }
a:focus-visible { outline: 2px solid #67e8f9; outline-offset: 3px; }
.en { color: #67e8f9; font-weight: bold; }
.notice { border-right: 4px solid #67e8f9; padding: 10px 14px; background: #10243c; }
.cta { display: inline-block; padding: 10px 14px; border-radius: 9px; background: #104157; font-weight: bold; }
.seo-hero-image { margin: 18px 0; border: 1px solid #263b58; border-radius: 16px; overflow: hidden; background: #0d1b31; }
.seo-hero-image img { display: block; max-width: 100%; height: auto; }
.seo-hero-image figcaption { padding: 10px 16px; color: #b7c7da; }
.examples { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); gap: 14px; }
.examples article { border: 1px solid #294363; border-radius: 12px; padding: 16px; background: #10243c; }
.examples article h3 { margin-top: 0; }
li { margin: 7px 0; }
@media (max-width: 600px) {
  body { padding: 14px 10px; }
  main, header, section { padding: 16px; }
  main { padding: 7px; }
}