:root{
  /* ライトモードのみ。ブランド色 #0F172A 1色＋グレー。ポイント表示だけ青。グラデーションなし */
  --bg:#FFFFFF;--bg2:#F6F7F9;--line:#E3E6EA;
  --ink:#1A1D21;--ink2:#5B636E;--ink3:#6E7682;
  --brand:#0F172A;--brand-h:#1E293B;--pt:#2563EB;
  --max:1120px;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Noto Sans JP","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",system-ui,sans-serif;font-size:16px;line-height:1.85;letter-spacing:.02em;overflow-x:clip;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.45;letter-spacing:.01em;font-feature-settings:"palt" 1;word-break:auto-phrase}
p{margin:0}
a{color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:4px}
.nw{display:inline-block}
.skip{position:absolute;left:16px;top:-60px;background:var(--brand);color:#fff;padding:10px 16px;border-radius:6px;z-index:100;text-decoration:none}
.skip:focus{top:12px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
.num{font-variant-numeric:tabular-nums}
.smp{display:inline-block;font-size:12px;line-height:1;color:var(--ink2);border:1px solid var(--line);border-radius:8px;padding:4px 8px;white-space:nowrap;background:#fff}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 24px;border-radius:8px;font:inherit;font-weight:700;font-size:15px;text-decoration:none;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:background .15s,border-color .15s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-h)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink3)}
.btn svg{width:16px;height:16px}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.logo{display:flex;align-items:center;min-height:44px;gap:10px;text-decoration:none;font-weight:700;font-size:15px;letter-spacing:.04em;white-space:nowrap}
.logo svg{width:28px;height:28px}
.logo small{font-weight:400;color:var(--ink3);font-size:12px;border-left:1px solid var(--line);padding-left:10px}
.nav{display:none;gap:28px;font-size:14px;color:var(--ink2)}
.nav a{text-decoration:none;padding:10px 0}
.nav a:hover{color:var(--ink)}
.hdr .btn{min-height:44px;padding:8px 14px;font-size:14px}
@media (max-width:479px){.logo small{display:none}}

/* sections */
section{padding:80px 0}
.sec-alt{background:var(--bg2)}
.eyebrow{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink3);letter-spacing:.08em;margin-bottom:16px}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--ink3)}
.h2{font-size:26px}
.lead{color:var(--ink2);margin-top:20px;max-width:660px}
.sec-head{margin-bottom:44px}

/* hero */
.hero{padding:48px 0 72px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;gap:48px}
.kicker{display:inline-block;font-size:14px;font-weight:700;border:1px solid var(--line);border-radius:999px;padding:6px 14px;margin-bottom:22px}
.hero h1{font-size:34px;line-height:1.35}
.hero h1 .big{display:block;font-size:1.25em;letter-spacing:-.02em}
.hero-sub{margin-top:24px;color:var(--ink2);font-size:16px;max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.fee{margin-top:36px;border:1px solid var(--ink);border-radius:12px;display:grid;grid-template-columns:1fr 1fr;overflow:hidden;max-width:560px}
.fee div{padding:16px 18px}
.fee div+div{border-left:1px solid var(--line)}
.fee dt{font-size:13px;color:var(--ink2)}
.fee dd{margin:2px 0 0;font-weight:700;font-size:24px;line-height:1.3}
.fee dd small{font-size:13px;font-weight:400;color:var(--ink2);margin-left:2px}
.fee .sep{grid-column:1/-1;border-left:0!important;border-top:1px solid var(--line);font-size:14px;font-weight:700;padding:12px 18px;background:var(--bg2)}

/* console mock (商品登録) */
.console{margin:0;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:0 1px 2px rgba(16,24,40,.05);overflow:hidden;font-size:13px;line-height:1.6;position:relative}
.c-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;height:40px;padding:0 12px;border-bottom:1px solid var(--line);background:var(--bg2)}
.c-bar .dots{display:flex;gap:6px}
.c-bar i{display:block;width:9px;height:9px;border-radius:50%;background:var(--line)}
.c-body{display:grid;grid-template-columns:1fr}
.c-side{display:none;border-right:1px solid var(--line);padding:14px 10px;background:#FBFBFC}
.c-side li{padding:6px 10px;border-radius:6px;color:var(--ink2);font-size:12.5px}
.c-side li.on{background:var(--bg2);color:var(--ink);font-weight:700}
.c-main{padding:16px;min-width:0}
.c-main h4{font-size:15px;margin-bottom:10px;display:flex;justify-content:space-between;align-items:center}
.seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-bottom:12px}
.seg span{flex:1;text-align:center;padding:6px 4px;font-size:12px;color:var(--ink2)}
.seg span+span{border-left:1px solid var(--line)}
.seg span.on{background:var(--brand);color:#fff;font-weight:700}
.fld{border:1px solid var(--line);border-radius:6px;padding:6px 10px;margin-top:8px}
.fld label{display:block;font-size:12px;color:var(--ink3)}
.fld-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.ph-up{display:flex;gap:8px;margin-top:8px}
.ph-up span{width:56px;height:56px;border-radius:6px;background:var(--bg2);border:1px dashed #C5CBD3}
.ph-up span:first-child{background:#F3EDE3;border-style:solid;border-color:var(--line)}
.c-sum{margin-top:12px;border-top:1px solid var(--line);padding-top:10px;display:grid;gap:4px}
.c-sum div{display:flex;justify-content:space-between;font-size:12.5px}
.c-sum b{font-weight:700}
.c-act{display:flex;gap:8px;justify-content:flex-end;margin-top:12px}
.mini{display:inline-flex;align-items:center;min-height:34px;padding:0 14px;border-radius:6px;background:var(--brand);color:#fff;font-size:12.5px;font-weight:700}
.mini.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}

/* pricing */
.price-grid{display:grid;gap:32px}
.price-card{border:1px solid var(--ink);border-radius:12px;background:#fff;overflow:hidden}
.pc-row{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:18px 22px;border-bottom:1px solid var(--line)}
.pc-row:last-child{border-bottom:0}
.pc-row span{color:var(--ink2);font-size:15px;flex:none}
.pc-row strong{font-size:26px;line-height:1.25;text-align:right}
.pc-row strong small{font-size:13px;font-weight:400;color:var(--ink2);margin-left:4px}
.pc-row strong.s{font-size:16px}
.pc-row.key{background:var(--bg2)}
.pc-note{font-size:13px;color:var(--ink2);margin-top:14px}
.calc{border:1px solid var(--line);border-radius:12px;background:#fff;padding:24px}
.calc h3{font-size:18px}
.calc p{color:var(--ink2);font-size:14.5px;margin-top:8px}
.calc ul{margin-top:14px;display:grid;gap:8px;font-size:14.5px}
.calc li{display:flex;justify-content:space-between;gap:12px;border-bottom:1px dashed var(--line);padding-bottom:8px}
.calc li b{white-space:nowrap}
.special{margin-top:20px;border-left:3px solid var(--ink);padding:4px 0 4px 16px;font-size:14.5px;color:var(--ink2)}
.special b{color:var(--ink)}

/* sell */
.sell{display:grid;gap:20px}
.scard{border:1px solid var(--line);border-radius:12px;background:#fff;padding:22px}
.scard .k{font-size:13px;color:var(--ink3);letter-spacing:.06em}
.scard h3{font-size:19px;margin-top:4px}
.scard p{color:var(--ink2);font-size:15px;margin-top:8px}
.scard .eg{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--ink3)}

/* invite */
.inv{display:grid;gap:40px}
.steps{border-top:1px solid var(--ink)}
.steps li{display:grid;grid-template-columns:64px 1fr;gap:12px;padding:20px 0;border-bottom:1px solid var(--line)}
.steps .sn{font-size:13px;font-weight:700;color:var(--ink3);padding-top:2px}
.steps h3{font-size:17px}
.steps p{color:var(--ink2);margin-top:4px;font-size:15px}
.frag{border:1px solid var(--line);border-radius:12px;background:#fff;padding:20px;font-size:14px;line-height:1.65;position:relative}
.frag-label{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12px;color:var(--ink3);margin-bottom:12px}
.inv-tbl{font-size:13px}
.inv-tbl th,.inv-tbl td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left}
.inv-tbl thead th{font-size:12px;color:var(--ink3);font-weight:400}
.st{font-size:12px;font-weight:700;white-space:nowrap}
.st.x{color:var(--ink3)}
.inv-sum{margin-top:12px;display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13px}
.inv-sum b{font-weight:700}
.caution{margin-top:20px;border:1px solid var(--line);border-radius:10px;background:var(--bg2);padding:14px 16px;font-size:14.5px}
.caution b{display:block;margin-bottom:2px}

/* boost */
.boost{display:grid;gap:24px}
.boost .ptchip{display:inline-block;font-size:13px;font-weight:700;color:var(--pt);background:var(--bg2);border-radius:8px;padding:4px 10px}
.btbl{font-size:15px;border-top:1px solid var(--line)}
.btbl th,.btbl td{padding:14px 0;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.btbl th{font-weight:700;width:40%;padding-right:16px}
.btbl td{color:var(--ink2)}

/* data */
.data li{display:grid;grid-template-columns:28px 1fr;gap:2px 14px;padding:18px 0;border-bottom:1px solid var(--line)}
.data li:first-child{border-top:1px solid var(--line)}
.data svg{width:22px;height:22px;margin-top:3px;grid-row:span 2}
.data h3{font-size:17px}
.data p{color:var(--ink2);font-size:15px}

/* faq */
.faq{border-top:1px solid var(--line);max-width:820px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:64px;padding:16px 0;font-weight:700}
.faq summary::-webkit-details-marker{display:none}
.faq summary .pm{flex:none;width:20px;height:20px;position:relative}
.faq summary .pm::before,.faq summary .pm::after{content:"";position:absolute;left:3px;right:3px;top:9px;height:2px;background:var(--ink)}
.faq summary .pm::after{transform:rotate(90deg)}
.faq details[open] .pm::after{transform:rotate(0)}
.faq .a{padding:0 36px 22px 0;color:var(--ink2)}

/* final */
.final{padding:0 0 96px}
.final-box{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:40px 24px;display:grid;gap:36px}
.final-box h2{font-size:26px}
.final-list{margin-top:24px;display:grid;gap:8px;font-size:15px;color:var(--ink2)}
.final-list li{padding-left:18px;position:relative}
.final-list li::before{content:"";position:absolute;left:0;top:.8em;width:8px;height:2px;background:var(--ink)}
.form{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px 20px;display:grid;gap:16px}
.form h3{font-size:17px}
.form label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
.form label span{font-weight:400;color:var(--ink3);margin-left:6px;font-size:12px}
.form input,.form select{width:100%;min-height:48px;border:1px solid var(--line);border-radius:8px;padding:10px 12px;font:inherit;font-size:16px;color:var(--ink);background:#fff}
.form input:focus,.form select:focus{outline:2px solid var(--ink);outline-offset:1px;border-color:var(--ink)}
.form .btn{width:100%}
.form-note{font-size:12px;color:var(--ink3)}
.form-done{display:none;padding:14px;border-radius:8px;background:var(--bg2);font-size:14px}
.form.is-done .form-done{display:block}

footer{border-top:1px solid var(--line);padding:32px 0 48px;font-size:13px;color:var(--ink3)}
footer .wrap{display:grid;gap:12px}
footer nav{display:flex;flex-wrap:wrap;gap:4px 20px}
footer a{text-decoration:none;display:inline-block;padding:12px 0}
.legal{margin-top:8px;line-height:1.8}

@media (min-width:768px){
  .wrap{padding:0 32px}
  section{padding:104px 0}
  .h2{font-size:34px}
  .hero{padding:72px 0 96px}
  .hero h1{font-size:40px}
  .c-body{grid-template-columns:132px 1fr}
  .c-side{display:block}
  .price-grid{grid-template-columns:1.1fr 1fr;gap:48px;align-items:start}
  .sell{grid-template-columns:1fr 1fr}
  .inv{grid-template-columns:1fr 1fr;gap:56px;align-items:start}
  .boost{grid-template-columns:1fr 1fr;gap:56px;align-items:start}
  .final-box{grid-template-columns:1.1fr 1fr;padding:56px;gap:56px}
  .final-box h2{font-size:34px}
  footer .wrap{grid-template-columns:1fr auto;align-items:center}
}
@media (min-width:1024px){
  .nav{display:flex}
  .hero-grid{grid-template-columns:5fr 5fr;gap:56px;align-items:center}
  .hero h1{font-size:44px}
  .sell{grid-template-columns:repeat(4,1fr)}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}