:root{
  --bg:#f7f9ff;
  --card:#ffffff;
  --ink:#111827;
  --muted:#667085;
  --line:#e4e9f2;
  --navy:#071125;
  --navy2:#0b1730;
  --purple:#7c4dff;
  --blue:#1ec8ff;
  --accent:#7357ff;
  --accent2:#16b7e8;
  --shadow:0 14px 36px rgba(21,33,64,.12);
  --softShadow:0 8px 22px rgba(21,33,64,.08);
  --radius:18px;
  --siteTopHeight:156px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;
  margin:0;
  color:var(--ink);
  background:
    radial-gradient(circle at 15% 0%, rgba(124,77,255,.12), transparent 30%),
    radial-gradient(circle at 90% 18%, rgba(30,200,255,.10), transparent 28%),
    var(--bg);
}
a{color:#6847ff;text-decoration:underline;text-underline-offset:3px;font-weight:700;}
a:hover{text-decoration:none;}
.siteHero{
  position:relative;
  margin:0 0 22px;
  color:#fff;
  background:#081225 url("/header_bg.webp") center/cover no-repeat;
  overflow:hidden;
}
.siteHero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;height:60px;
  background:linear-gradient(180deg,rgba(247,249,255,0),var(--bg));
  pointer-events:none;
}
.siteTop{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:var(--siteTopHeight);
  z-index:2000;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 28px 18px;
  background:rgba(8,18,37,.88);
  border-bottom:1px solid rgba(255,255,255,.14);
  box-shadow:0 10px 28px rgba(0,0,0,.18);
  backdrop-filter:blur(12px);
}
.brand{
  display:flex;
  align-items:center;
  min-width:0;
  text-decoration:none;
  margin-right:0;
}
.brandLogo{
  width:340px;
  max-width:62vw;
  max-height:calc(var(--siteTopHeight) - 44px);
  height:auto;
  object-fit:contain;
  display:block;
  flex:0 1 auto;
  filter:drop-shadow(0 6px 18px rgba(30,200,255,.35));
}
.menuWrap{position:relative;z-index:3;}
.menuButton{
  display:flex;
  align-items:center;
  justify-content:center;
  width:54px;
  height:54px;
  border:1px solid rgba(255,255,255,.20);
  border-radius:16px;
  background:rgba(255,255,255,.08);
  box-shadow:0 8px 24px rgba(0,0,0,.16);
  cursor:pointer;
  backdrop-filter:blur(8px);
}
.menuButton img{width:30px;height:30px;object-fit:contain;}
.menuPanel{
  display:none;
  position:absolute;
  right:0;
  top:0%;
  min-width:230px;
  padding:10px;
  border:1px solid rgba(255,255,255,.18);
  border-radius:16px;
  background:rgba(8,18,37,.94);
  box-shadow:0 16px 40px rgba(0,0,0,.28);
  backdrop-filter:blur(12px);
}
.menuPanel a{
  display:block;
  margin:0;
  padding:11px 12px;
  border-radius:12px;
  color:#fff;
  text-decoration:none;
  font-weight:700;
}
.menuPanel a:hover{background:rgba(255,255,255,.10);}
.menuWrap:hover .menuPanel,
.menuWrap:focus-within .menuPanel{display:block;}
.heroCopy{
  position:relative;
  z-index:1;
  padding:calc(var(--siteTopHeight) + 28px) 28px 120px;
}
.heroCopy h1{
  margin:0;
  font-size:52px;
  line-height:1.14;
  letter-spacing:.01em;
  text-shadow:0 4px 22px rgba(0,0,0,.25);
}
.heroLead{
  max-width:900px;
  margin:18px 0 0;
  color:rgba(255,255,255,.94);
  font-size:18px;
  line-height:1.9;
  font-weight:700;
}
.heroKeywords{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:18px;
}
.heroKeywords span{
  display:inline-flex;
  align-items:center;
  padding:7px 11px;
  border:1px solid rgba(255,255,255,.24);
  border-radius:999px;
  background:rgba(255,255,255,.10);
  color:rgba(255,255,255,.92);
  font-size:13px;
  font-weight:750;
  backdrop-filter:blur(8px);
}
.breadcrumb{
  margin-bottom:12px;
  font-size:14px;
  color:rgba(255,255,255,.82);
  font-weight:700;
}
.breadcrumb a{
  color:rgba(255,255,255,.94);
  text-decoration:none;
}
.breadcrumb a:hover{text-decoration:underline;}
main.pageShell{
  width:min(100%, 1080px);
  margin:-100px auto 42px;
  padding:0 28px;
  position:relative;
  z-index:5;
}
.contentCard{
  background:rgba(255,255,255,.90);
  border:1px solid rgba(228,233,242,.94);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:30px;
  backdrop-filter:blur(16px);
}
.contentCard h2{margin:0 0 14px;font-size:28px;line-height:1.35;}
.contentCard h3{margin:30px 0 10px;font-size:21px;}
.contentCard p{margin:0 0 14px;line-height:1.9;color:#263043;}
.contentCard ul{margin:0 0 16px 1.2em;padding:0;color:#263043;line-height:1.9;}
.contentCard li{margin:4px 0;}
.featureGrid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:14px;
  margin:20px 0 4px;
}
.featureItem{padding:16px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--softShadow);}
.featureItem strong{display:block;margin-bottom:6px;font-size:16px;}
.featureItem span{display:block;color:var(--muted);line-height:1.7;font-size:14px;}
.noticeBox{margin-top:18px;padding:16px;border:1px solid #e7d8a7;border-radius:16px;background:#fffaf0;color:#3f3520;}
.noticeBox p{margin:0;color:#3f3520;}
.linkArea{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px;}
.linkButton{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 16px;
  border-radius:12px;
  text-decoration:none;
  color:#fff;
  background:linear-gradient(135deg,var(--purple),var(--blue));
  box-shadow:0 10px 24px rgba(91,78,255,.22);
}
.linkButton.secondary{color:#111827;background:#fff;border:1px solid var(--line);box-shadow:var(--softShadow);}
.siteFooter{
  width:min(100%, 1080px);
  margin:0 auto 32px;
  padding:0 28px;
  color:var(--muted);
  font-size:13px;
}
.siteFooter nav{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:10px;}

@media (max-width:700px){
  :root{--siteTopHeight:96px;}
  body{font-size:15px;}
  .siteTop{padding:18px 20px 14px;}
  .brandLogo{width:230px;max-width:68vw;}
  .menuButton{width:48px;height:48px;border-radius:14px;}
  .menuButton img{width:28px;height:28px;}
  .menuPanel{top:56px;}
  .heroCopy{padding:calc(var(--siteTopHeight) + 30px) 24px 105px;}
  .heroCopy h1{font-size:34px;line-height:1.22;}
  .heroLead{font-size:15px;line-height:1.8;}
  .heroKeywords{gap:7px;margin-top:14px;}
  .heroKeywords span{font-size:12px;padding:6px 9px;}
  main.pageShell{margin:-86px auto 32px;padding:0 12px;}
  .contentCard{padding:20px;border-radius:16px;}
  .contentCard h2{font-size:24px;}
  .featureGrid{grid-template-columns:1fr;}
  .linkArea{display:block;}
  .linkButton{width:100%;margin-bottom:10px;}
  .siteFooter{padding:0 12px;}
}