:root{
  --bg:#f3fbff;
  --card:#ffffff;
  --text:#08101c;
  --muted:#6b778c;
  --line:rgba(12, 74, 110, .14);
  --accent:#06b6d4;
  --accent2:#38bdf8;
  --shadow:0 12px 28px rgba(2,132,199,.14);
  --radius:18px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,Roboto,Helvetica,Arial,"Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",sans-serif;
  color:var(--text);
  background:
    radial-gradient(1100px 650px at 10% -15%, rgba(6,182,212,.16), transparent 62%),
    radial-gradient(900px 600px at 90% 0%, rgba(56,189,248,.14), transparent 58%),
    linear-gradient(180deg,#f7feff 0%, var(--bg) 62%, #f7feff 100%);
  font-size:16px;
  line-height:1.65;
}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1100px;margin:0 auto;padding:22px 16px 72px}

/* ===== Header ===== */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,254,255,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{
  max-width:1100px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 16px;
}
.brand{display:flex;align-items:center;gap:10px;min-width:220px}
.badge{
  width:40px;height:40px;border-radius:14px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 10px 18px rgba(2,132,199,.18);
}
.brand b{display:block;font-size:20px;letter-spacing:.02em;line-height:1.05}
.brand small{display:block;font-size:12px;color:var(--muted);margin-top:2px}

/* Desktop nav */
.nav-desktop{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav-desktop a{
  font-weight:800;font-size:14px;
  padding:10px 14px;border-radius:999px;
  border:1px solid rgba(215,238,240,.95);
  background:rgba(255,255,255,.90);
  box-shadow:0 10px 22px rgba(2,132,199,.10);
}
.nav-desktop a[aria-current="page"]{
  background:linear-gradient(135deg, rgba(6,182,212,.22), rgba(56,189,248,.18));
  border-color:rgba(6,182,212,.35);
}

/* Mobile nav (JSなし) */
.nav-mobile{display:none;position:relative}
.nav-mobile summary{
  list-style:none;
  cursor:pointer;
  width:44px;height:44px;border-radius:14px;
  border:1px solid rgba(215,238,240,.95);
  background:rgba(255,255,255,.92);
  box-shadow:0 10px 22px rgba(2,132,199,.10);
  display:flex;align-items:center;justify-content:center;
}
.nav-mobile summary::-webkit-details-marker{display:none}
.hamburger{
  width:20px;height:2px;background:rgba(8,16,28,.75);border-radius:2px;position:relative;
}
.hamburger::before,.hamburger::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:rgba(8,16,28,.75);border-radius:2px;
}
.hamburger::before{top:-6px}
.hamburger::after{top:6px}

.nav-mobile .panel{
  position:absolute;right:0;top:52px;
  width:min(360px, calc(100vw - 32px));
  background:rgba(255,255,255,.96);
  border:1px solid rgba(215,238,240,.95);
  border-radius:16px;
  box-shadow:var(--shadow);
  padding:10px;
}
.nav-mobile a{
  display:block;
  padding:12px 12px;border-radius:12px;
  border:1px solid rgba(215,238,240,.90);
  background:rgba(255,255,255,.90);
  font-weight:800;
  margin:8px 0;
}

/* ===== Sections / Cards ===== */
.hero{
  margin-top:18px;
  display:flex;
  gap:18px;
  align-items:stretch;
}
.hero > .box{
  flex:1;
  background:rgba(255,255,255,.94);
  border:1px solid rgba(215,238,240,.95);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:18px;
}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;
  color:rgba(8,16,28,.72);
  background:rgba(230,255,251,.92);
  border:1px solid rgba(215,238,240,.95);
  padding:6px 10px;border-radius:999px;
}
h1{margin:10px 0 8px;font-size:34px;line-height:1.15}
.lead{margin:0;color:var(--muted)}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 16px;border-radius:14px;
  border:1px solid rgba(215,238,240,.95);
  background:rgba(255,255,255,.94);
  font-weight:800;
  box-shadow:0 14px 28px rgba(2,132,199,.12);
}
.btn.primary{
  border-color:transparent;
  background:linear-gradient(135deg, rgba(6,182,212,.95), rgba(56,189,248,.90));
  color:#052225;
}

.section{margin-top:22px}
.section h2{margin:0 0 10px;font-size:22px;padding-left:12px;border-left:5px solid var(--accent)}
.cards{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:14px;
}
.card{
  background:rgba(255,255,255,.94);
  border:1px solid rgba(215,238,240,.95);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:16px;
}
.card h3{margin:0 0 6px;font-size:18px}
.card p{margin:0;color:var(--muted)}

.two{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:14px;
}

footer{margin-top:26px;text-align:center;color:var(--muted);font-size:12px}

/* ===== Responsive ===== */
@media (max-width:980px){
  .nav-desktop{display:none}
  .nav-mobile{display:block}
  .hero{flex-direction:column}
  .cards{grid-template-columns:1fr}
  .two{grid-template-columns:1fr}
}
@media (min-width:981px){
  .nav-mobile{display:none}
}
/* Services tabs (hide radio controls & show panels) */
.tabs{position:relative}
.tabs .tab-input{position:absolute;opacity:0;pointer-events:none}
.tabs .tablist{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 18px}
.tabs .tab{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;
  border:1px solid rgba(215,238,240,.95);background:rgba(255,255,255,.75);font-weight:900;cursor:pointer}
.tabs .tab-panels .tab-panel{display:none}
#tab-personal:checked ~ .tab-panels .panel-personal{display:block}
#tab-business:checked ~ .tab-panels .panel-business{display:block}
#tab-personal:checked ~ .tablist .tab-personal,
#tab-business:checked  ~ .tablist .tab-business{
  background:rgba(230,255,251,.95);border-color:rgba(6,182,212,.28)
}