:root{--navy:#14213d;--navy2:#1d2d52;--gold:#b8955a;--ink:#2b2b2b;--mute:#6b6b6b;--ivory:#faf8f3;--line:#e6e0d4}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"Noto Sans JP",system-ui,sans-serif;color:var(--ink);background:#fff;line-height:1.95;letter-spacing:.03em;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3,.brand,.name{font-family:"Noto Serif JP",serif}

.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 32px;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
.brand{font-weight:700;font-size:18px;text-decoration:none;color:var(--navy);letter-spacing:.08em}
.nav nav{display:flex;gap:22px;align-items:center}
.nav nav a{font-size:14px;text-decoration:none;color:var(--mute)}
.nav nav a:hover{color:var(--navy)}
.nav .cta{background:var(--navy);color:#fff!important;padding:7px 18px}

.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 100%);color:#fff;display:grid;grid-template-columns:1.4fr 1fr;align-items:center;gap:40px;padding:90px max(32px,calc((100vw - 1040px)/2)) 90px}
.kicker{font-size:12px;letter-spacing:.35em;color:var(--gold)}
.hero h1{font-size:clamp(34px,5.2vw,54px);font-weight:600;line-height:1.45;margin:14px 0 22px}
.lead{max-width:520px;color:#d6dbe6}
.who{margin-top:30px;font-family:"Noto Serif JP",serif;font-size:18px;border-top:1px solid rgba(184,149,90,.6);padding-top:16px;display:inline-block}
.who small{font-size:13px;color:#b9c1d3;margin-left:6px}
.hero-book img{width:200px;margin:0 auto;box-shadow:0 30px 50px -20px rgba(0,0,0,.7);transform:rotate(-3deg)}

.sec{padding:90px 24px}
.sec.dark{background:var(--navy);color:#e8ebf2}
.sec.soft{background:var(--ivory)}
h2{text-align:center;font-size:clamp(24px,3.4vw,30px);font-weight:600;margin-bottom:46px;color:inherit}
.sec:not(.dark) h2{color:var(--navy)}
h2 span{display:block;font-family:"Noto Sans JP",sans-serif;font-size:12px;letter-spacing:.35em;color:var(--gold);margin-bottom:6px}

.profile{max-width:860px;margin:0 auto;display:grid;grid-template-columns:200px 1fr;gap:40px}
.name{font-size:28px;font-weight:600;color:var(--navy);line-height:1.4}
.name small{display:block;font-family:"Noto Sans JP",sans-serif;font-size:13px;color:var(--mute);letter-spacing:.15em}
.profile p+p{margin-top:12px}
.src{font-size:12px;color:var(--mute)}
.keys{max-width:860px;margin:44px auto 0;list-style:none;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.keys li{text-align:center;padding:22px 10px}
.keys li+li{border-left:1px solid var(--line)}
.keys b{display:block;font-family:"Noto Serif JP",serif;font-size:22px;color:var(--navy)}
.keys span{font-size:13px;color:var(--mute)}

.book{max-width:900px;margin:0 auto;display:grid;grid-template-columns:200px 1fr;gap:44px;align-items:start}
.book img{box-shadow:0 20px 40px -18px rgba(0,0,0,.8)}
.book h3{font-size:22px;font-weight:600;line-height:1.6;color:#fff}
.meta{font-size:13px;color:#aeb7cb;margin:8px 0 16px}
details{margin-top:18px;border:1px solid rgba(255,255,255,.2);padding:12px 16px}
summary{cursor:pointer;color:var(--gold)}
.toc{margin:12px 0 0 1.2em;font-size:14px}
.buy{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.buy a{border:1px solid var(--gold);color:#fff;text-decoration:none;padding:8px 18px;font-size:14px}
.buy a:hover{background:var(--gold)}

.services{max-width:860px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:22px}
.services article{border:1px solid var(--line);padding:30px 28px;border-top:3px solid var(--gold)}
.services h3{font-size:20px;color:var(--navy);margin-bottom:8px}
.center{text-align:center;margin-top:26px}
.small{font-size:13px;color:var(--mute)}

.form{max-width:640px;margin:0 auto;display:grid;gap:18px;background:#fff;padding:36px;border:1px solid var(--line)}
.form label{display:grid;gap:6px;font-weight:500;color:var(--navy);font-size:15px}
.form em{font-style:normal;font-size:11px;background:var(--navy);color:#fff;padding:0 7px;margin-left:8px;justify-self:start;display:inline-block;width:max-content}
.form input[type=text],.form input[type=email],.form select,.form textarea{font:inherit;font-weight:400;border:1px solid #cfc8ba;padding:11px 12px;background:#fff;width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--gold);border-color:var(--gold)}
.form button{justify-self:center;background:var(--navy);color:#fff;border:0;padding:14px 60px;font:inherit;letter-spacing:.15em;cursor:pointer}
.form button:hover{background:var(--navy2)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}

.ft{background:var(--navy);color:#c9cfdc;text-align:center;padding:40px 20px;font-size:14px}
.ft-name{font-family:"Noto Serif JP",serif;font-size:18px;color:#fff}
.copy{font-size:12px;opacity:.7;margin-top:14px}

@media (max-width:760px){
  .nav{padding:12px 16px}
  .nav nav a:not(.cta){display:none}
  .hero{grid-template-columns:1fr;padding:60px 22px;text-align:left;gap:30px}
  .hero-book img{width:150px}
  .sec{padding:64px 20px}
  .profile,.book{grid-template-columns:1fr;gap:20px}
  .book img{width:160px}
  .keys{grid-template-columns:1fr}
  .keys li+li{border-left:0;border-top:1px solid var(--line)}
  .services{grid-template-columns:1fr}
  .form{padding:24px 18px}
}