:root{
  --bg:#F4F6F9; --surface:#FFFFFF; --line:#D8DEE7;
  --ink:#18202C; --ink2:#4A5566; --ink3:#7A8595;
  --accent:#2A5A8A; --accent-soft:#E2EBF5; --shu:#B53A26; --shu-soft:#F8E6E1;
  --sans:"BIZ UDPGothic","Hiragino Sans","Yu Gothic UI",Meiryo,system-ui,sans-serif;
  --serif:"BIZ UDMincho","Hiragino Mincho ProN","Yu Mincho",serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root{
  color-scheme:dark;
  --bg:#12161D; --surface:#1A2029; --line:#2F3845;
  --ink:#E7EBF1; --ink2:#AEB8C6; --ink3:#7F8A9A;
  --accent:#7FAEDD; --accent-soft:#223246; --shu:#F08A74; --shu-soft:#3A2420;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.8}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:760px;margin:0 auto;padding-inline:20px}
header.site{border-bottom:1px solid var(--line);background:var(--surface)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand img{width:36px;height:36px;border-radius:9px}
.brand span{font-family:var(--serif);font-weight:700;font-size:18px;letter-spacing:.04em}
nav.site{display:flex;gap:18px;font-size:14px}
nav.site a{text-decoration:none;color:var(--ink2)}
nav.site a[aria-current="page"]{color:var(--accent);font-weight:700}
main{padding-block:36px 56px}
.hero{display:flex;gap:22px;align-items:center;flex-wrap:wrap;margin-bottom:36px}
.hero img{width:104px;height:104px;border-radius:24px;box-shadow:0 6px 20px rgba(20,40,70,.18)}
.hero h1{font-family:var(--serif);font-size:30px;line-height:1.35;margin:0 0 6px;letter-spacing:.03em;text-wrap:balance}
.hero p{margin:0;color:var(--ink2)}
h1.page{font-family:var(--serif);font-size:28px;line-height:1.4;margin:0 0 8px;letter-spacing:.03em}
.updated{color:var(--ink3);font-size:13px;margin:0 0 28px}
section{margin-top:34px}
h2{font-size:18px;margin:0 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
h3{font-size:16px;margin:22px 0 6px}
ul,ol{padding-left:1.4em;margin:8px 0}
li{margin:4px 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;padding:0;list-style:none}
.features li{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.features b{display:block;margin-bottom:4px}
.features span{color:var(--ink2);font-size:14px;line-height:1.7}
.mail{display:inline-flex;align-items:center;gap:8px;font-size:17px;font-weight:700;background:var(--accent-soft);padding:10px 16px;border-radius:10px;word-break:break-all}
.copy{border:1px solid var(--line);background:var(--surface);color:var(--ink2);border-radius:8px;padding:4px 10px;font:inherit;font-size:13px;cursor:pointer}
.note{background:var(--shu-soft);border-radius:12px;padding:14px 18px;font-size:14.5px}
.note b{color:var(--shu)}
dl.faq dt{font-weight:700;margin-top:18px}
dl.faq dd{margin:4px 0 0;color:var(--ink2)}
table{border-collapse:collapse;width:100%;font-size:14.5px}
.tablewrap{overflow-x:auto}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--accent-soft);white-space:nowrap}
footer.site{border-top:1px solid var(--line);color:var(--ink3);font-size:13px}
footer.site .wrap{padding-block:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media (max-width:480px){.hero h1{font-size:25px}h1.page{font-size:24px}}