:root{--grass:#1FA85A;--grass-deep:#15864A;--sky:#3BB4F0;--sky-deep:#1E88E5;--sun:#FFD84D;--ink:#1D2B24;--ink-soft:#5C6B63;--bg:#F6FBF7;--card:#fff}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7}
a{color:var(--sky-deep)}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header.hero{background:linear-gradient(135deg,#4FC3F7 0%,#26B6A6 55%,#1FA85A 100%);color:#fff;padding:48px 0 40px}
header.hero h1{margin:0 0 8px;font-size:2rem;font-weight:900;letter-spacing:.5px}
header.hero p{margin:0;font-weight:600;opacity:.95}
nav{display:flex;gap:16px;flex-wrap:wrap;margin-top:18px}
nav a{color:#fff;text-decoration:none;font-weight:700;background:rgba(255,255,255,.18);padding:6px 14px;border-radius:999px}
main{padding:32px 0 56px}
.card{background:var(--card);border:1px solid rgba(31,168,90,.16);border-radius:22px;padding:22px 24px;margin:0 0 18px;box-shadow:0 8px 18px rgba(21,134,74,.08)}
h2{font-size:1.25rem;margin:0 0 10px;font-weight:900;color:var(--grass-deep)}
h3{font-size:1.05rem;margin:18px 0 6px;font-weight:800}
.tag{display:inline-block;background:#E2F4FD;color:#0B4F73;font-weight:700;font-size:.8rem;padding:2px 10px;border-radius:999px;margin-left:6px;vertical-align:middle}
.btn{display:inline-block;background:linear-gradient(90deg,#34C46E,#12915A);color:#fff;font-weight:900;text-decoration:none;padding:12px 22px;border-radius:999px;box-shadow:0 6px 14px rgba(18,145,90,.3)}
.btn.sky{background:linear-gradient(90deg,#4FC3F7,#1E88E5)}
.muted{color:var(--ink-soft);font-size:.92rem}
footer{border-top:1px solid rgba(31,168,90,.16);padding:20px 0 40px;color:var(--ink-soft);font-size:.85rem}
ul{padding-left:1.2em}
dl dt{font-weight:800;margin-top:12px}
dl dd{margin:2px 0 0 0}