:root {
  --navy: #1b2d4f;
  --navy-2: #2c4a7c;
  --accent: #2f7de1;
  --ink: #1f2430;
  --muted: #5d6475;
  --line: #e3e7ef;
  --bg-soft: #f4f6fb;
  --white: #fff;
  --radius: 12px;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.4; margin: 0 0 .6em; }
p { margin: 0 0 1em; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 800; letter-spacing: .08em; font-size: 22px; color: var(--navy); text-decoration: none; }
.nav { display: flex; gap: 28px; }
.nav a { color: var(--ink); text-decoration: none; font-size: 13px; letter-spacing: .1em; font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent); }
.nav-toggle { display: none; background: none; border: 0; font-size: 24px; cursor: pointer; color: var(--navy); }

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--white);
         flex-direction: column; gap: 0; border-bottom: 1px solid var(--line); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 20px; border-top: 1px solid var(--line); }
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, var(--accent) 100%);
  color: var(--white);
  padding: 110px 0 100px;
  text-align: center;
}
.hero h1 { font-size: clamp(28px, 5vw, 48px); font-weight: 800; letter-spacing: .02em; }
.hero p { font-size: clamp(15px, 2vw, 18px); opacity: .9; margin-top: 12px; }
.page-hero { padding: 72px 0 60px; }
.page-hero .eyebrow { display: block; font-size: 13px; letter-spacing: .25em; opacity: .8; margin-bottom: 8px; }

/* Sections */
section { padding: 80px 0; }
.section-soft { background: var(--bg-soft); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title .en { display: block; color: var(--accent); font-size: 13px; letter-spacing: .25em; font-weight: 700; }
.section-title h2 { font-size: clamp(22px, 3vw, 30px); margin-top: 6px; }
.lead { max-width: 760px; margin: 0 auto 1em; text-align: center; color: var(--muted); }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
.card h3 { font-size: 18px; color: var(--navy); }
.card .num { font-size: 13px; font-weight: 800; color: var(--accent); letter-spacing: .1em; display: block; margin-bottom: 4px; }
.card .tag { font-size: 11px; color: var(--muted); letter-spacing: .15em; text-transform: uppercase; display: block; margin-bottom: 8px; }
.card p:last-child { margin-bottom: 0; }
.card ul { margin: 0; padding-left: 1.2em; }

a.card { text-decoration: none; color: inherit; transition: box-shadow .2s, transform .2s; }
a.card:hover { box-shadow: 0 10px 30px rgba(27,45,79,.12); transform: translateY(-2px); }
.card .more { color: var(--accent); font-weight: 700; font-size: 14px; }

/* Buttons / CTA */
.btn {
  display: inline-block; background: var(--accent); color: var(--white);
  padding: 14px 36px; border-radius: 999px; text-decoration: none; font-weight: 700;
  letter-spacing: .05em; transition: opacity .2s;
}
.btn:hover { opacity: .85; }
.btn-outline { background: transparent; border: 2px solid var(--white); }
.cta { background: var(--navy); color: var(--white); text-align: center; }
.cta h2 { font-size: clamp(20px, 3vw, 28px); }
.cta p { opacity: .85; }

/* Steps */
.steps { counter-reset: step; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.step { background: var(--white); border-radius: var(--radius); padding: 24px; border-top: 4px solid var(--accent); }
.step::before { counter-increment: step; content: "STEP " counter(step); font-size: 12px; font-weight: 800; color: var(--accent); letter-spacing: .1em; }
.step h3 { font-size: 17px; margin-top: 6px; }
.step p { font-size: 14px; color: var(--muted); margin: 0; }

/* Table */
.info-table { width: 100%; border-collapse: collapse; }
.info-table th, .info-table td { text-align: left; padding: 16px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.info-table th { width: 30%; color: var(--navy); font-weight: 700; white-space: nowrap; }

/* Team */
.member .role { color: var(--accent); font-weight: 700; font-size: 14px; margin-bottom: 8px; display: block; }

/* FAQ */
details { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 12px; }
summary { cursor: pointer; padding: 18px 22px; font-weight: 700; list-style: none; position: relative; padding-right: 48px; }
summary::-webkit-details-marker { display: none; }
summary::before { content: "Q"; color: var(--accent); margin-right: 10px; font-weight: 800; }
summary::after { content: "+"; position: absolute; right: 22px; top: 14px; font-size: 22px; color: var(--accent); }
details[open] summary::after { content: "−"; }
details .answer { padding: 0 22px 18px; color: var(--muted); }

/* Works */
.works li { padding: 12px 0; border-bottom: 1px solid var(--line); list-style: none; }
.works ul { padding: 0; margin: 0; }
.works strong { color: var(--navy); }

.badge { display: inline-block; background: #ffe9a8; color: #6b4b00; font-weight: 700; font-size: 13px; padding: 4px 14px; border-radius: 999px; margin-bottom: 12px; }
.note { font-size: 13px; color: var(--muted); }

/* Form */
.form-wrap { background: var(--white); border-radius: var(--radius); border: 1px solid var(--line); overflow: hidden; }
.form-wrap iframe { width: 100%; height: 1350px; border: 0; display: block; }

/* Footer */
.site-footer { background: #111a2e; color: #c4cad6; padding: 48px 0 32px; font-size: 14px; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; }
.site-footer a { color: #c4cad6; text-decoration: none; }
.site-footer a:hover { color: var(--white); }
.site-footer .logo { color: var(--white); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.copyright { width: 100%; border-top: 1px solid #263252; padding-top: 20px; margin-top: 8px; font-size: 12px; }