:root{
  --p:#1b2a5e;--p2:#4f6df5;--ink:#161b2e;--paper:#f6f7fb;--card:#ffffff;
  --line:#e3e7f2;--accent:#4f6df5;--accent2:#7b5cff;--mut:#5a6279;--maxw:1120px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;line-height:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
li{color:inherit}
ul.list{margin:14px 0 0 22px}.list li{margin-bottom:10px}

header.site{position:sticky;top:0;z-index:50;background:#ffffff;border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem}
.logo .ai{color:var(--accent);font-weight:900}
.logo img{border-radius:8px}
nav.main{display:flex;gap:20px;align-items:center;font-size:.94rem}
nav.main a{padding:6px 2px;border-bottom:2px solid transparent;font-weight:600;color:#3c4257}
nav.main a:hover,nav.main a.active{color:var(--accent);border-color:var(--accent)}
.nav-toggle{display:none;background:none;border:0;font-size:1.6rem;color:var(--ink);cursor:pointer}

.btn{display:inline-block;background:linear-gradient(120deg,var(--accent),var(--accent2));color:#fff;padding:13px 30px;border-radius:12px;font-weight:700;font-size:.95rem;box-shadow:0 8px 22px rgba(90,105,240,.32);transition:transform .15s}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--accent);border:1.6px solid var(--accent);box-shadow:none}
.btn.light{background:#fff;color:var(--accent);box-shadow:none}
.btn.sm{padding:8px 18px;font-size:.85rem;border-radius:9px}

.hero{padding:78px 0 66px;background:
  radial-gradient(circle at 10% 15%, rgba(79,109,245,.16), transparent 42%),
  radial-gradient(circle at 90% 20%, rgba(123,92,255,.14), transparent 44%),
  linear-gradient(180deg,#ffffff,#f6f7fb)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.eyebrow{display:inline-block;color:var(--accent);font-weight:800;letter-spacing:.14em;font-size:.8rem;margin-bottom:16px;border:1px solid #d8defc;background:#fff;padding:6px 14px;border-radius:999px}
.hero h1{font-size:clamp(2.2rem,5vw,3.4rem);line-height:1.12;font-weight:900;letter-spacing:-.01em}
.hero .sub{margin:22px 0 0;max-width:620px;color:#4a5065;font-size:1.05rem}
.cta-row{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{display:flex;gap:16px;flex-direction:column}
.cv-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:0 14px 40px rgba(30,40,90,.1)}
.cv-card.small{max-width:70%;align-self:flex-end}
.cv-top{display:flex;gap:6px;align-items:center;margin-bottom:12px}
.cv-dot{width:10px;height:10px;border-radius:50%;background:#c9cfe6}
.cv-bar{height:10px;width:90px;border-radius:6px;background:#eef0fb}
.cv-img{border-radius:12px;height:180px}
.grad1{background:linear-gradient(135deg,#4f6df5,#8c6cf0 55%,#e07acc)}
.grad2{background:linear-gradient(135deg,#2fb5c8,#4f6df5)}
.cv-caption{color:var(--mut);font-size:.84rem;margin:12px 0 10px}
.cv-row{display:flex;gap:8px;flex-wrap:wrap}
.chip{background:#f0f2fb;border:1px solid var(--line);padding:5px 13px;border-radius:999px;color:var(--accent);font-weight:600;font-size:.82rem}

.blk{padding:62px 0}
.blk.alt{background:#eef1fb}
h2.sec{font-size:1.7rem;font-weight:900;margin-bottom:12px}
p.sec-sub{color:var(--mut);margin-bottom:32px;max-width:680px}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:0 6px 18px rgba(30,40,90,.05)}
.card h3{font-size:1.12rem;margin-bottom:8px;color:var(--p)}
.card p{color:#4a5065;font-size:.95rem}
.num{font-size:1.05rem;font-weight:900;color:var(--accent);margin-bottom:10px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px}
.ph-line{padding:14px 0;border-bottom:1px dashed var(--line);font-size:.96rem;color:#454b60}
.ph-line:last-child{border-bottom:0}
.ph-line b{display:block;color:var(--p);margin-bottom:3px}
.note{background:#f0f3ff;border-left:4px solid var(--accent);padding:16px 20px;border-radius:10px;color:#454b60;font-size:.93rem;margin-top:26px}
.note a{color:var(--accent);font-weight:700}
.narrow{max-width:840px!important}

.phead{padding:54px 0 30px;border-bottom:1px solid var(--line)}
.phead h1{font-size:clamp(1.9rem,4.4vw,2.8rem);font-weight:900;line-height:1.15}
.lede{margin-top:14px;max-width:700px;color:#4a5065;font-size:1.03rem}
.crumb{font-size:.85rem;color:var(--mut);margin-bottom:16px}
.crumb a{color:var(--accent)}

.steps{display:flex;flex-direction:column;gap:14px;margin-top:10px}
.step{display:flex;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px;align-items:flex-start}
.step b{font-size:1.15rem;font-weight:900;color:var(--accent);background:#eef0fb;border:1px solid var(--line);border-radius:10px;min-width:44px;height:44px;display:flex;align-items:center;justify-content:center}
.step strong{color:var(--p)}
.step p{color:#4a5065;font-size:.94rem;margin-top:3px}

.cta-band{background:linear-gradient(120deg,var(--p),var(--accent));color:#fff;padding:64px 0;text-align:center}
.cta-band .wrap{display:flex;flex-direction:column;align-items:center;max-width:760px}
.cta-band h2{color:#fff;font-size:1.7rem;font-weight:900}
.cta-band p{color:rgba(255,255,255,.9);margin:12px 0 26px}

.faqwrap{display:flex;flex-direction:column;gap:12px}
.faq{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq summary{padding:18px 22px;cursor:pointer;font-weight:800;color:var(--p);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.3rem;color:var(--accent)}
.faq[open] summary::after{content:"–"}
.faq .a{padding:2px 22px 18px;color:#4a5065;font-size:.95rem}

footer.site{border-top:1px solid var(--line);margin-top:60px;padding:42px 0 34px;background:#ffffff;color:var(--mut);font-size:.88rem}
.ft{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.ft p{max-width:400px;margin-top:10px;font-size:.85rem;line-height:1.7}
.ft nav{display:flex;gap:18px;flex-wrap:wrap}
.ft nav a:hover{color:var(--accent)}
.ft .logo{font-weight:800;color:var(--ink)}

@media(max-width:840px){
  .g3{grid-template-columns:1fr}
  .g2{grid-template-columns:1fr}
  .hero-grid{grid-template-columns:1fr}
  .nav-toggle{display:block}
  nav.main{position:fixed;top:66px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:18px 24px;gap:15px;border-bottom:1px solid var(--line);display:none;box-shadow:0 12px 30px rgba(0,0,0,.08)}
  nav.main.open{display:flex}
  nav.main .btn{display:inline-block}
  .hero{padding:52px 0 48px}
  .phead{padding:38px 0 22px}
}