body {
  font-family: 'Segoe UI', 'Yu Gothic', 'Meiryo', sans-serif;
  background: #f5f7fa;
  margin: 0;
  padding: 0;
  color: #222;
}
.article-container {
  max-width: 800px;
  margin: 40px auto;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.07);
  padding: 36px 28px 32px 28px;
  border: 1px solid #e1e5ea;
}
.article-meta {
  font-size: 0.95em;
  color: #888;
  margin-bottom: 10px;
}
.article-title {
  font-size: 2rem;
  font-weight: 700;
  color: #1a237e;
  margin: 0 0 18px 0;
  line-height: 1.3;
  letter-spacing: 0.02em;
}
.article-thumb {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 22px;
  background: #e1e5ea;
}
.article-content {
  font-size: 1.13em;
  line-height: 1.85;
  color: #333;
  margin-bottom: 36px;
}
.article-content h2 {
  font-size: 1.3em;
  color: #1a237e;
  margin-top: 2.3em;
  margin-bottom: 0.7em;
  font-weight: 600;
}
.article-content ul, .article-content ol {
  margin-left: 1.2em;
  margin-bottom: 1.5em;
}
.back-link {
  display: inline-block;
  background: #2962ff;
  color: #fff;
  text-decoration: none;
  padding: 8px 20px;
  border-radius: 6px;
  font-size: 1em;
  font-weight: 500;
  transition: background 0.2s;
  box-shadow: 0 2px 8px rgba(41,98,255,0.07);
  margin-top: 14px;
}
.back-link:hover {
  background: #0039cb;
}
.lang-switcher {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255,255,255,0.9);
  padding: 8px 15px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.lang-switcher a {
  margin-left: 12px;
  color: #2962ff;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95em;
}
.lang-switcher a:hover {
  text-decoration: underline;
}
@media (max-width: 600px) {
  .article-container {
    padding: 18px 4vw 22px 4vw;
    margin: 12px 0;
  }
  .article-title {
    font-size: 1.3rem;
  }
  .article-thumb {
    max-height: 180px;
  }
  .lang-switcher {
    top: 10px;
    right: 10px;
    padding: 6px 12px;
  }
}