:root{
  --ink:#222222; --indigo:#2B4A7A; --indigo-2:#4F7CC0; --paper:#F5F6F8; --white:#FFFFFF;
  --muted:#5B6270; --line:#DDE1E7; --tbd:#B4531F; --tbd-bg:#FFF4EC;
  --w:1080px; --r:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans JP",system-ui,-apple-system,"Hiragino Sans",sans-serif;color:var(--ink);background:var(--white);line-height:1.85;font-size:16px;-webkit-font-smoothing:antialiased;letter-spacing:.02em}
a{color:var(--indigo);text-underline-offset:3px}
img{max-width:100%;display:block}
.wrap{max-width:var(--w);margin:0 auto;padding:0 24px}
.tbd{color:var(--tbd);background:var(--tbd-bg);border-radius:4px;padding:0 4px;font-size:.92em;white-space:nowrap}

/* header */
.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.logo img{height:26px;width:auto}
.nav{display:flex;align-items:center;gap:28px;font-size:14px}
.nav a{color:var(--ink);text-decoration:none}
.nav a:hover,.nav a[aria-current="page"]{color:var(--indigo)}
.nav .btn{color:var(--white)}
.menu-toggle{display:none;background:none;border:0;font:inherit;font-size:14px;color:var(--ink);cursor:pointer;padding:8px}

/* buttons */
.btn{display:inline-block;background:var(--indigo);color:var(--white);text-decoration:none;padding:12px 22px;border-radius:999px;font-weight:700;font-size:15px;line-height:1.4;transition:background .15s}
.btn:hover{background:#223c64}
.btn.ghost{background:transparent;color:var(--indigo);border:1.5px solid var(--indigo)}
.btn.ghost:hover{background:var(--paper)}
.btn.small{padding:8px 16px;font-size:13px}

/* hero */
.hero{padding:96px 0 88px;border-bottom:1px solid var(--line)}
.eyebrow{font-size:13px;font-weight:700;color:var(--indigo);letter-spacing:.12em;margin-bottom:20px}
.hero h1{font-size:clamp(26px,4.2vw,44px);line-height:1.5;font-weight:700;letter-spacing:.01em}
.nb{display:inline-block}
.nw{white-space:nowrap}
.hero p.lead{margin-top:24px;font-size:17px;color:var(--muted);max-width:36em}
.hero .actions{margin-top:36px;display:flex;gap:12px;flex-wrap:wrap}

/* sections */
section{padding:88px 0}
section.alt{background:var(--paper)}
.sec-head{margin-bottom:44px;max-width:40em}
.sec-head .num{font-size:13px;color:var(--indigo);font-weight:700;letter-spacing:.12em}
.sec-head h2{font-size:clamp(22px,2.8vw,30px);line-height:1.5;margin-top:8px}
.sec-head p{margin-top:14px;color:var(--muted)}
.page-head{padding:72px 0 56px;border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(26px,3.6vw,38px);line-height:1.45}
.page-head p{margin-top:16px;color:var(--muted);max-width:38em}

/* grids & cards */
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:28px}
section.alt .card{border-color:transparent}
.card h3{font-size:18px;line-height:1.5;margin-bottom:10px}
.card p{font-size:15px;color:var(--muted)}
.card .tag{display:inline-block;font-size:12px;font-weight:700;color:var(--indigo);background:#E9EEF6;border-radius:999px;padding:2px 10px;margin-bottom:12px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;counter-reset:s;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--white)}
.step{padding:30px 28px;border-right:1px solid var(--line);position:relative}
.step:last-child{border-right:0}
.step .n{font-size:12px;font-weight:700;color:var(--indigo);letter-spacing:.1em}
.step h3{font-size:19px;margin:6px 0 10px;line-height:1.5}
.step p{font-size:15px;color:var(--muted)}
.step .meta{margin-top:16px;font-size:13px;color:var(--ink);border-top:1px dashed var(--line);padding-top:12px}

/* proof (実物) */
.proof{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.doc{background:var(--white);border:1px solid var(--line);border-radius:8px;box-shadow:0 1px 0 rgba(0,0,0,.03),0 12px 32px -18px rgba(34,34,34,.25);font-size:13.5px;overflow:hidden}
.doc .bar{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line);background:#FAFBFC;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;color:var(--muted)}
.doc .bar i{width:8px;height:8px;border-radius:50%;background:var(--line);display:inline-block}
.doc table{width:100%;border-collapse:collapse}
.doc th,.doc td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;line-height:1.6}
.doc th{font-weight:700;background:#FAFBFC;font-size:12px;color:var(--muted)}
.doc tr:last-child td{border-bottom:0}
.doc .mask{background:#E6E8EC;color:transparent;border-radius:3px;user-select:none}
.doc pre{padding:16px 18px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;line-height:1.75;white-space:pre-wrap;color:var(--ink)}
.caption{font-size:13px;color:var(--muted);margin-top:10px}
.checks{list-style:none;margin-top:20px}
.checks li{padding:10px 0 10px 28px;border-bottom:1px solid var(--line);position:relative;font-size:15px}
.checks li::before{content:"";position:absolute;left:4px;top:19px;width:12px;height:3px;background:var(--indigo);border-radius:2px}

/* profile */
.profile{display:grid;grid-template-columns:220px 1fr;gap:48px;align-items:start}
.portrait{aspect-ratio:4/5;background:var(--paper);border-radius:var(--r);display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;text-align:center;padding:16px}
.timeline{list-style:none;border-left:2px solid var(--line);margin-top:8px}
.timeline li{padding:0 0 18px 20px;position:relative;font-size:15px}
.timeline li::before{content:"";position:absolute;left:-6px;top:9px;width:10px;height:10px;border-radius:50%;background:var(--white);border:2px solid var(--indigo)}
.timeline b{display:inline-block;min-width:6.5em;color:var(--indigo);font-weight:700}

/* table */
.spec{width:100%;border-collapse:collapse;font-size:15px}
.spec th,.spec td{padding:16px 0;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec th{width:10em;color:var(--muted);font-weight:500}

/* price */
.price{font-size:22px;font-weight:700;color:var(--ink);margin-top:14px}
.price small{font-size:13px;font-weight:400;color:var(--muted)}

/* cta band */
.cta{background:var(--indigo);color:var(--white);padding:72px 0}
.cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta h2{font-size:clamp(22px,2.8vw,28px);line-height:1.5}
.cta p{color:#D5DEEC;margin-top:8px}
.cta .btn{background:var(--white);color:var(--indigo)}
.cta .btn:hover{background:var(--paper)}

/* form */
.form{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:32px}
.field{margin-bottom:28px}
.field > label,.field > .label{display:block;font-weight:700;margin-bottom:10px}
.field .hint{font-size:13px;color:var(--muted);font-weight:400;margin-left:6px}
.opts{display:flex;flex-wrap:wrap;gap:10px}
.opts label{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14px;cursor:pointer;background:var(--white)}
.opts input{accent-color:var(--indigo)}
.opts label:has(input:checked){border-color:var(--indigo);background:#E9EEF6}
input[type=text],input[type=email],textarea{width:100%;font:inherit;font-size:15px;padding:12px 14px;border:1px solid var(--line);border-radius:8px;background:var(--white);color:var(--ink)}
input:focus,textarea:focus{outline:2px solid var(--indigo-2);outline-offset:1px;border-color:transparent}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.note{font-size:13px;color:var(--muted)}
.notice{border:1px dashed var(--tbd);background:var(--tbd-bg);color:var(--tbd);border-radius:8px;padding:12px 16px;font-size:13px;margin-bottom:24px}
.side-list{list-style:none}
.side-list li{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}

/* prose */
.prose h2{font-size:20px;margin:40px 0 12px}
.prose p,.prose li{font-size:15px;color:var(--ink)}
.prose ul{padding-left:1.2em}

/* footer */
.site-footer{background:var(--ink);color:#C9CDD4;padding:56px 0 40px;font-size:14px}
.site-footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.site-footer img{height:22px;width:auto;margin-bottom:16px}
.site-footer a{color:#C9CDD4;text-decoration:none}
.site-footer a:hover{color:var(--white)}
.site-footer ul{list-style:none}
.site-footer li{padding:4px 0}
.site-footer .copy{grid-column:1/-1;border-top:1px solid #3A3D42;padding-top:20px;font-size:12px;color:#8C929B}

/* responsive */
@media (max-width:860px){
  .g3,.g2,.steps,.proof,.profile{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--line)}
  .step:last-child{border-bottom:0}
  .profile .portrait{max-width:200px}
  .site-footer .wrap{grid-template-columns:1fr}
}
@media (max-width:760px){
  .wrap{padding:0 16px}
  .menu-toggle{display:block}
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--white);flex-direction:column;align-items:stretch;gap:0;border-bottom:1px solid var(--line);padding:8px 16px 16px}
  .nav a{padding:12px 0;border-bottom:1px solid var(--line)}
  .nav .btn{margin-top:12px;text-align:center;border-bottom:0}
  .nav.open{display:flex}
  .hero{padding:64px 0 56px}
  section{padding:64px 0}
  .row2{grid-template-columns:1fr}
  .spec th{width:7em}
  .form{padding:22px}
}