:root{
  --bar-height: 56px;
  --content-width: 1120px;
  --border: #e3e8f0;
  --border-strong: #cad5e2;
  --text: #111827;
  --muted: #667085;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --bg-card: #fbfcff;
  --accent: #183a6b;
  --accent-2: #335c99;
  --accent-soft: #eef4ff;
  --shadow-sm: 0 10px 24px rgba(15, 23, 42, .05);
  --shadow-md: 0 20px 48px rgba(15, 23, 42, .10);
  --radius-sm: 16px;
  --radius-md: 24px;
  --radius-lg: 32px;
}

*{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  padding-top:var(--bar-height);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","Yu Gothic","Noto Sans JP",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top right, rgba(24,58,107,.08), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

a{color:inherit;}
img{max-width:100%;}

.cs-utility-bar{
  position:fixed;
  inset:0 0 auto 0;
  height:var(--bar-height);
  background:rgba(9, 14, 24, .92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  display:flex;
  align-items:center;
  gap:24px;
  padding:0 24px;
  z-index:1000;
  border-bottom:1px solid rgba(255,255,255,.08);
}

.cs-utility-bar a{
  position:relative;
  color:#fff;
  text-decoration:none;
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  padding:6px 2px;
  opacity:.88;
  transition:opacity .2s ease;
}

.cs-utility-bar a[aria-current="page"],
.cs-utility-bar a:hover{
  opacity:1;
}

.cs-utility-bar a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-8px;
  width:100%;
  height:2px;
  background:#fff;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s ease;
}

.cs-utility-bar a[aria-current="page"]::after,
.cs-utility-bar a:hover::after{
  transform:scaleX(1);
}

.page-header .inner,
main,
footer{
  width:min(var(--content-width), calc(100% - 40px));
  margin:0 auto;
}

.page-header{
  position:relative;
  overflow:hidden;
  background:
    linear-gradient(180deg, rgba(250,252,255,.98) 0%, rgba(241,246,253,.98) 100%);
  border-bottom:1px solid var(--border);
}

.page-header::before{
  content:"";
  position:absolute;
  right:-80px;
  top:20px;
  width:340px;
  height:340px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(24,58,107,.10) 0%, rgba(24,58,107,0) 70%);
  pointer-events:none;
}

.page-header .inner{
  padding:88px 0 64px;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 18px;
  color:var(--accent);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
}

.eyebrow::before{
  content:"";
  width:40px;
  height:1px;
  background:currentColor;
  opacity:.6;
}

h1{
  margin:0;
  font-size:clamp(42px, 6vw, 76px);
  line-height:1.02;
  letter-spacing:-.03em;
}

.lead{
  max-width:760px;
  margin:20px 0 0;
  color:#344054;
  font-size:17px;
  line-height:1.95;
}

.summary-section{
  padding:34px 0 10px;
}

.summary-card{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:18px;
  padding:24px;
  border:1px solid rgba(24,58,107,.08);
  border-radius:var(--radius-md);
  background:linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  box-shadow:var(--shadow-sm);
}

.summary-item{
  padding:18px 20px;
  border-radius:18px;
  background:var(--bg-soft);
  border:1px solid var(--border);
}

.summary-label{
  margin:0 0 8px;
  color:var(--muted);
  font-size:13px;
  letter-spacing:.06em;
  text-transform:uppercase;
}

.summary-value{
  margin:0;
  font-size:18px;
  font-weight:700;
  color:var(--accent);
}

.member-section{
  padding:56px 0;
}

.member-section + .member-section{
  border-top:1px solid var(--border);
}

.section-head{
  display:flex;
  align-items:end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:26px;
}

.section-title{
  display:flex;
  align-items:center;
  gap:16px;
  margin:0;
  font-size:32px;
  line-height:1.15;
  letter-spacing:-.02em;
}

.section-title::before{
  content:"";
  width:5px;
  height:28px;
  border-radius:999px;
  background:linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 100%);
  box-shadow:0 0 0 6px var(--accent-soft);
  flex:0 0 auto;
}

.section-meta{
  margin:0;
  color:var(--muted);
  font-size:14px;
}

.alumni-grid{
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:18px;
}

.alumni-card{
  position:relative;
  min-height:auto;
  padding:16px 14px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  background:linear-gradient(180deg, #ffffff 0%, #fbfcff 100%);
  box-shadow:var(--shadow-sm);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.alumni-card:hover{
  transform:translateY(-4px);
  border-color:var(--border-strong);
  box-shadow:0 18px 38px rgba(15, 23, 42, .10);
}

.alumni-card.featured{
  border-color:rgba(24,58,107,.18);
  background:
    radial-gradient(circle at top right, rgba(24,58,107,.06), transparent 32%),
    linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%);
}

.alumni-badge{
  display:inline-flex;
  align-items:center;
  min-height:28px;
  padding:0 10px;
  border-radius:999px;
  background:var(--accent-soft);
  color:var(--accent);
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  text-transform:uppercase;
}

.alumni-card h3{
  margin:14px 0 8px;
  font-size:18px;
  line-height:1.2;
  letter-spacing:-.02em;
}

.alumni-course{
  margin:0 0 10px;
  color:#243b63;
  font-weight:700;
}

.alumni-detail,
.alumni-destination{
  margin:0;
  color:var(--muted);
  font-size:14px;
  line-height:1.8;
}

.alumni-destination{
  margin-top:8px;
}

.archive-panel{
  padding:30px;
  border:1px solid rgba(24,58,107,.08);
  border-radius:var(--radius-md);
  background:linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
  box-shadow:var(--shadow-sm);
}

.archive-text{
  margin:0 0 18px;
  color:#344054;
}

.archive-links{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

.archive-links a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:42px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid var(--accent);
  color:var(--accent);
  background:#fff;
  text-decoration:none;
  font-size:14px;
  font-weight:700;
  transition:transform .18s ease, box-shadow .18s ease, background-color .18s ease, color .18s ease;
}

.archive-links a:hover{
  transform:translateY(-1px);
  background:var(--accent);
  color:#fff;
  box-shadow:0 10px 22px rgba(24,58,107,.22);
}

footer{
  width:min(var(--content-width), calc(100% - 40px));
  margin:0 auto;
  padding:30px 0 56px;
  color:var(--muted);
  font-size:14px;
}

@media (max-width: 1080px){
  .alumni-grid{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px){
  .summary-card{
    grid-template-columns:1fr;
  }

  .section-head{
    display:block;
  }

  .section-meta{
    margin-top:8px;
  }
}

@media (max-width: 640px){
  :root{
    --bar-height: 52px;
  }

  .cs-utility-bar{
    gap:16px;
    padding:0 14px;
    overflow-x:auto;
    white-space:nowrap;
  }

  .page-header .inner,
  main,
  footer{
    width:min(var(--content-width), calc(100% - 24px));
  }

  .page-header .inner{
    padding:60px 0 42px;
  }

  .lead{
    font-size:15px;
  }

  .summary-section{
    padding-top:24px;
  }

  .member-section{
    padding:42px 0;
  }

  .section-title{
    gap:12px;
    font-size:24px;
  }

  .section-title::before{
    height:22px;
  }

  .alumni-grid{
    grid-template-columns:1fr;
  }

  .archive-panel{
    padding:22px 18px;
  }
}