:root{--main:#0a7d5c;--dark:#1a2b3c;--bg:#fafbfc;--text:#2d3748;--muted:#718096;--line:#e2e8f0}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",Meiryo,sans-serif;color:var(--text);background:var(--bg);line-height:1.9;font-size:16px}
header{background:var(--dark);padding:14px 20px}
header .inner{max-width:860px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.logo{color:#fff;font-weight:700;font-size:1.25rem;text-decoration:none}
.logo span{color:#4fd1a5}
nav a{color:#cbd5e0;text-decoration:none;font-size:.85rem;margin-left:16px}
nav a:hover{color:#fff}
main{max-width:860px;margin:0 auto;padding:36px 20px}
h1{font-size:1.6rem;line-height:1.5;margin-bottom:20px;color:var(--dark)}
h2{font-size:1.25rem;margin:36px 0 14px;padding:8px 14px;border-left:5px solid var(--main);background:#fff;color:var(--dark)}
h3{font-size:1.05rem;margin:24px 0 10px;color:var(--dark)}
p{margin-bottom:16px}
ul,ol{margin:0 0 16px 24px}
li{margin-bottom:6px}
a{color:var(--main)}
.hero{background:linear-gradient(135deg,var(--dark),#234a63);color:#fff;border-radius:12px;padding:36px 28px;margin-bottom:36px}
.hero h1{color:#fff;margin-bottom:10px}
.hero p{color:#cbd5e0;margin:0;font-size:.95rem}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px;margin-bottom:18px}
.card h3{margin-top:0}
.card a{text-decoration:none;font-weight:700}
.meta{color:var(--muted);font-size:.8rem}
.notice{background:#fff8e6;border:1px solid #f6e2a8;border-radius:8px;padding:14px 18px;font-size:.9rem;margin-bottom:24px}
.ad-label{display:inline-block;background:#edf2f7;color:var(--muted);font-size:.75rem;padding:2px 10px;border-radius:4px;margin-bottom:12px}
footer{border-top:1px solid var(--line);margin-top:60px;padding:28px 20px;text-align:center;font-size:.8rem;color:var(--muted)}
footer a{color:var(--muted);margin:0 8px}
@media(max-width:600px){body{font-size:15px}h1{font-size:1.35rem}.hero{padding:26px 20px}}