/* ===== Base ===== */
:root{
  --blue-900:#0a2a4a;
  --blue-700:#0d47a1;
  --blue-500:#1976d2;
  --blue-300:#4fc3f7;
  --green-700:#00897b;
  --green-500:#26a69a;
  --green-400:#2ecc71;
  --grad: linear-gradient(135deg,#0d47a1 0%,#1976d2 45%,#26a69a 100%);
  --grad-soft: linear-gradient(135deg,#e3f2fd 0%,#e0f2f1 100%);
  --text:#1a2733;
  --text-sub:#4a5a6a;
  --line:#e3e8ee;
  --bg-soft:#f5f9fc;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans JP",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--text);
  line-height:1.9;
  background:#fff;
  -webkit-font-smoothing:antialiased;
  word-break:normal;
  overflow-wrap:anywhere;
  line-break:strict;
}
p{
  word-break:normal;
  overflow-wrap:break-word;
  line-break:strict;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s;
}
.site-header.scrolled{box-shadow:0 4px 20px rgba(13,71,161,.08)}
.header-inner{
  max-width:1200px;margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:44px;width:auto;object-fit:contain}
.brand-name{
  font-weight:700;font-size:17px;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  letter-spacing:.02em;
}
.nav{display:flex;gap:28px}
.nav a{
  font-size:14px;font-weight:500;color:var(--text);
  position:relative;padding:6px 0;transition:color .2s;
}
.nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--grad);transition:width .3s;
}
.nav a:hover{color:var(--blue-700)}
.nav a:hover::after{width:100%}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--blue-900);transition:.3s}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:78vh;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;color:#fff;padding-top:72px;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:var(--grad);
}
.hero-bg::before,.hero-bg::after{
  content:"";position:absolute;border-radius:50%;
  background:rgba(255,255,255,.08);filter:blur(40px);
}
.hero-bg::before{width:500px;height:500px;top:-100px;left:-100px}
.hero-bg::after{width:600px;height:600px;bottom:-200px;right:-150px;background:rgba(46,204,113,.15)}
.hero-inner{position:relative;z-index:1;text-align:center;padding:40px 24px}
.hero-title{
  font-size:clamp(32px,7vw,72px);font-weight:900;
  letter-spacing:.05em;line-height:1.45;
  text-shadow:0 4px 30px rgba(0,0,0,.2);
  animation:fadeUp 1s ease both;
  word-break:keep-all;
  overflow-wrap:break-word;
}
.hero-title .nowrap{display:inline-block;white-space:nowrap}
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}

/* ===== Sections ===== */
.section{padding:100px 24px}
.section-dark{
  background:linear-gradient(135deg,#0a2a4a 0%,#0d47a1 50%,#00695c 100%);
  color:#fff;
}
.section-soft{background:var(--bg-soft)}
.container{max-width:1100px;margin:0 auto}
.sec-title{
  font-size:clamp(24px,3.5vw,32px);font-weight:700;
  margin-bottom:48px;padding-bottom:16px;
  border-bottom:3px solid transparent;
  border-image:var(--grad) 1;
  display:inline-block;
}
.sec-title-light{color:#fff;border-image:linear-gradient(135deg,#4fc3f7,#2ecc71) 1}

/* ===== Greeting ===== */
.greeting-layout{
  display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:start;
}
.greeting-photo img{
  width:100%;border-radius:12px;
  box-shadow:0 12px 40px rgba(13,71,161,.18);
  border:4px solid #fff;
}
.greeting-text p{margin-bottom:1.2em;color:var(--text-sub)}

/* ===== Philosophy ===== */
.philosophy-text{font-size:clamp(16px,1.8vw,19px);line-height:2.1;max-width:900px}
.philosophy-text p{margin-bottom:1.5em}
.philosophy-text p:first-child{
  font-size:clamp(18px,2.2vw,22px);font-weight:500;
  color:#a7ffeb;
}

/* ===== Policy ===== */
.policy-text{max-width:900px}
.policy-text p{margin-bottom:1.2em;color:var(--text-sub)}
.policy-text p:first-child{
  font-size:18px;font-weight:600;color:var(--blue-700);
  padding-left:16px;border-left:4px solid;
  border-image:var(--grad) 1;
}

/* ===== Business ===== */
.biz-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:32px;
}
.biz-card{
  background:#fff;padding:40px 32px;border-radius:14px;
  border-top:5px solid transparent;
  border-image:var(--grad) 1;
  box-shadow:0 8px 30px rgba(13,71,161,.08);
  transition:transform .3s, box-shadow .3s;
}
.biz-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(13,71,161,.15)}
.biz-heading{
  font-size:20px;font-weight:700;margin-bottom:20px;
  color:var(--blue-700);
}
.biz-card p{margin-bottom:1em;color:var(--text-sub);font-size:15px}

/* ===== Company ===== */
.company-table{max-width:900px;border-top:1px solid var(--line)}
.company-row{
  display:grid;grid-template-columns:200px 1fr;gap:24px;
  padding:24px 8px;border-bottom:1px solid var(--line);
}
.company-row dt{
  font-weight:700;color:var(--blue-700);
  position:relative;padding-left:18px;
}
.company-row dt::before{
  content:"";position:absolute;left:0;top:.7em;
  width:8px;height:8px;border-radius:50%;
  background:var(--grad);
}
.company-row dd{color:var(--text-sub)}
.affiliation-text{margin-bottom:20px;font-weight:600;color:var(--text)}
.affiliation-logo{
  max-width:520px;padding:24px;background:#fff;
  border:1px solid var(--line);border-radius:12px;
  box-shadow:0 6px 20px rgba(13,71,161,.08);
}
.affiliation-logo img{width:100%}

/* ===== Footer ===== */
.site-footer{
  background:var(--blue-900);padding:40px 24px;
  display:flex;justify-content:center;
}
.footer-inner{display:flex;justify-content:center;align-items:center}
.footer-logo{height:64px;width:auto;object-fit:contain;filter:brightness(0) invert(1) opacity(.9)}

/* ===== Scroll reveal ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s, transform .8s}
.reveal.visible{opacity:1;transform:none}

/* ===== Responsive ===== */
@media (max-width: 820px){
  .nav{
    position:fixed;top:68px;left:0;right:0;
    background:#fff;flex-direction:column;gap:0;
    border-top:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .3s;
  }
  .nav.open{max-height:400px;box-shadow:0 8px 20px rgba(0,0,0,.1)}
  .nav a{padding:16px 24px;border-bottom:1px solid var(--line)}
  .nav a::after{display:none}
  .nav-toggle{display:flex}
  .brand-name{font-size:13px}
  .brand-logo{height:36px}
  .section{padding:70px 20px}
  .greeting-layout{grid-template-columns:1fr;gap:28px}
  .greeting-photo{max-width:260px;margin:0 auto}
  .company-row{grid-template-columns:1fr;gap:8px;padding:18px 4px}
  .company-row dt{font-size:14px}

  /* モバイル時の改行最適化 */
  .hero{min-height:64vh;padding-top:80px}
  .hero-title{
    font-size:clamp(30px,9vw,44px);
    line-height:1.55;letter-spacing:.03em;
  }
  /* 段落内の明示的な <br> はスマホでは無効化し、自然な折り返しに任せる */
  .greeting-text br,
  .philosophy-text br,
  .policy-text br,
  .biz-card p br{display:none}
  /* 段落の読みやすさ調整 */
  .greeting-text p,
  .policy-text p,
  .biz-card p{line-height:1.95;font-size:15px}
  .philosophy-text{font-size:16px;line-height:2}
  .philosophy-text p:first-child{font-size:18px}
  .sec-title{margin-bottom:32px;font-size:22px}
  .affiliation-logo{padding:16px}
}

@media (max-width: 480px){
  .header-inner{padding:12px 16px;gap:12px}
  .brand-name{display:none} /* 極小画面ではロゴのみに */
  .brand-logo{height:34px}
  .hero-title{font-size:clamp(28px,8.5vw,38px)}
  .section{padding:60px 16px}
  .biz-card{padding:28px 22px}
}