/* ==== Reset & Base ==== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","Segoe UI","Hiragino Kaku Gothic ProN","Hiragino Sans",Meiryo,sans-serif;
  color:#1a2332;
  background:#fafbfc;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:#0a4d8c;text-decoration:none}
a:hover{text-decoration:underline}

/* ==== Layout ==== */
.container{max-width:720px;margin:0 auto;padding:0 20px}
.site-header{
  background:#0a1d3a;
  color:#fff;
  padding:20px 0;
  margin-bottom:40px;
}
.site-header .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.site-header h1{font-size:1.4rem;font-weight:700}
.site-header h1 a{color:#fff}
.site-header nav a{color:#fff;margin-left:20px;font-size:.95rem}

.site-footer{
  background:#0a1d3a;
  color:#aab;
  padding:30px 0;
  margin-top:80px;
  text-align:center;
  font-size:.85rem;
}

/* ==== Article ==== */
article{background:#fff;padding:40px 30px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
article h1{font-size:1.8rem;line-height:1.5;margin-bottom:20px;color:#0a1d3a}
article .meta{color:#888;font-size:.85rem;margin-bottom:30px;border-bottom:1px solid #eee;padding-bottom:20px}
article .lead{font-size:1.05rem;background:#f0f5fa;padding:20px;border-left:4px solid #0a4d8c;margin-bottom:30px;border-radius:4px}
article h2{font-size:1.4rem;margin:50px 0 20px;padding-bottom:10px;border-bottom:2px solid #0a4d8c;color:#0a1d3a}
article h3{font-size:1.15rem;margin:30px 0 15px;color:#0a4d8c}
article p{margin-bottom:1.2em}
article ul,article ol{margin:0 0 1.2em 1.5em}
article li{margin-bottom:.4em}
article img.eyecatch{margin:0 -30px 30px;width:calc(100% + 60px);max-width:none;border-radius:4px}
article blockquote{background:#f7f7f7;border-left:4px solid #ccc;padding:15px 20px;margin:20px 0;color:#555}
article table{width:100%;border-collapse:collapse;margin:20px 0}
article th,article td{padding:10px;border:1px solid #ddd;text-align:left}
article th{background:#0a1d3a;color:#fff}

/* ==== ASP CTA ==== */
.cta{
  background:linear-gradient(135deg,#0a4d8c,#1a6bb8);
  color:#fff;
  padding:24px;
  border-radius:8px;
  margin:30px 0;
  text-align:center;
}
.cta a{
  display:inline-block;
  background:#fff;
  color:#0a4d8c;
  padding:12px 32px;
  border-radius:4px;
  font-weight:700;
  margin-top:12px;
  text-decoration:none;
}
.cta a:hover{background:#f0f5fa}

/* ==== Article List (top page) ==== */
.article-list{list-style:none;margin:0;padding:0}
.article-list li{
  background:#fff;
  padding:20px;
  margin-bottom:16px;
  border-radius:8px;
  box-shadow:0 1px 3px rgba(0,0,0,.06);
  display:flex;
  gap:16px;
  align-items:center;
}
.article-list .thumb{flex:0 0 100px}
.article-list .thumb img{border-radius:4px}
.article-list .info h3{font-size:1.05rem;margin-bottom:6px}
.article-list .info .meta{color:#888;font-size:.8rem}

/* ==== Mobile ==== */
@media (max-width:640px){
  article{padding:24px 18px}
  article h1{font-size:1.4rem}
  article h2{font-size:1.2rem}
  article img.eyecatch{margin:0 -18px 24px;width:calc(100% + 36px)}
  .article-list li{flex-direction:column}
  .article-list .thumb{flex:none;width:100%}
}