:root{
  --ink:#0e0e12;--paper:#ffffff;--card:#f6f5f3;--line:#e6e3df;
  --pink:#f43da0;--orange:#ff7a18;--blue:#3f8cff;--green:#22c874;--mut:#6c6861;--maxw:1140px;
}
*{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","Noto Sans JP",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 26px}
ul.list{margin:16px 0 0 22px}
ul.list li{margin-bottom:9px}
code{background:#efeae6;padding:2px 7px;border-radius:6px;font-size:.88em}

/* header — bold black brand */
header.site{position:sticky;top:0;z-index:50;background:var(--ink);color:#fff}
.top{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:9px;font-weight:900;font-size:1.25rem}
.logo .mark{background:conic-gradient(from 180deg,var(--pink),var(--orange),var(--green),var(--blue),var(--pink));width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.05rem}
.logo .word span{background:linear-gradient(90deg,var(--pink),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent}
nav.main{display:flex;gap:22px;align-items:center;font-size:.92rem;font-weight:600}
nav.main a{color:#e7e2dc;padding:6px 0;border-bottom:2px solid transparent}
nav.main a:hover,nav.main a.active{color:#fff;border-color:var(--pink)}
.nav-toggle{display:none;background:none;border:0;font-size:1.7rem;color:#fff;cursor:pointer}
.btn{display:inline-block;background:linear-gradient(90deg,var(--pink),var(--orange));color:#fff;padding:13px 30px;border-radius:12px;font-weight:800;font-size:.92rem;box-shadow:0 6px 18px rgba(244,61,160,.3);transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:#fff;color:var(--pink);border:1.6px solid var(--pink);box-shadow:none}
.btn.blue{background:linear-gradient(90deg,var(--blue),var(--green));box-shadow:0 6px 18px rgba(63,140,255,.3)}
.btn.sm{padding:8px 18px;font-size:.86rem}

/* hero — bold split with brand stripes */
.hero{padding:84px 0 70px;background:
  radial-gradient(circle at 90% 8%, #ffe3f2 0, transparent 44%),
  radial-gradient(circle at 8% 92%, #e0f6ff 0, transparent 46%),
  #fff}
.hero .stripes{height:8px;background:linear-gradient(90deg,var(--pink),var(--orange),var(--green),var(--blue),var(--pink));border-radius:999px;width:100%;max-width:520px;margin:0 0 26px}
.hero .eyebrow{display:inline-block;color:var(--pink);font-weight:800;letter-spacing:.14em;font-size:.76rem;margin-bottom:12px}
.hero h1{font-size:clamp(2.6rem,6.8vw,4.4rem);line-height:1.04;font-weight:900;letter-spacing:-.02em}
.hero h1 em{background:linear-gradient(90deg,var(--pink),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent;font-style:normal}
.hero .sub{margin:22px 0 0;max-width:620px;color:#4a4640;font-size:1.08rem}
.hero .cta-row{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.hero .tags{margin-top:34px;display:flex;gap:9px;flex-wrap:wrap}
.hero .tags span{background:var(--card);border:1px solid var(--line);padding:6px 16px;border-radius:999px;font-weight:700;font-size:.84rem;color:#3a362f}

/* sections */
section.blk{padding:62px 0}
section.blk.alt{background:#f2f1ef}
section.blk.dark{background:var(--ink);color:#fff}
section.blk.dark h2.sec{color:#fff}
section.blk.dark p.sec-sub{color:#b6b0a6}
h2.sec{font-size:clamp(1.6rem,3.6vw,2.2rem);font-weight:900;margin-bottom:12px}
p.sec-sub{color:var(--mut);margin-bottom:34px;max-width:680px;font-size:.98rem}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:0 8px 24px rgba(20,16,12,.05)}
.card h3{font-size:1.13rem;margin-bottom:8px;font-weight:800}
.card .ico{width:38px;height:38px;border-radius:10px;background:var(--card);color:var(--pink);display:flex;align-items:center;justify-content:center;font-size:1.15rem;margin-bottom:13px}
.card.green .ico{color:var(--green);background:#eefbf3}
.card.blue .ico{color:var(--blue);background:#eaf3ff}
.card.orange .ico{color:var(--orange);background:#fff2e8}
.card p{color:#4a4640;font-size:.94rem}
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:50px;align-items:center}
.panel{background:var(--ink);color:#fff;border-radius:18px;padding:34px}
.panel h3{font-size:1.15rem;margin-bottom:16px;font-weight:800}
.ph-line{padding:14px 0;border-bottom:1px solid #2c2c34;font-size:.92rem}
.ph-line:last-child{border-bottom:0}
.ph-line b{display:block;color:#fff;margin-bottom:3px}
.ph-line span{color:#a8a29a}
.note{background:#f7eef4;border-left:4px solid var(--pink);padding:16px 20px;border-radius:10px;color:#4a4640;font-size:.9rem;margin-top:26px}
.narrow{max-width:820px!important}

/* feature rows */
.feat{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;margin-bottom:14px}
.feat .fx{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px}
.feat .fx h3{font-size:1.15rem;font-weight:800;margin-bottom:8px}
.feat .fx p{color:#4a4640;font-size:.94rem}
.tool-pill{display:inline-block;background:var(--card);border:1px solid var(--line);padding:6px 14px;border-radius:999px;color:#3a362f;font-size:.84rem;font-weight:700;margin:4px 4px 0 0}

/* table */
table.tb{width:100%;border-collapse:collapse;font-size:.92rem;background:#fff;border:1px solid var(--line)}
.tb th,.tb td{padding:13px 16px;border-bottom:1px solid var(--line);text-align:left}
.tb th{background:#f2f1ef;font-weight:800}
.tb tr:last-child td{border-bottom:0}

/* faq */
.faqwrap{display:flex;flex-direction:column;gap:12px}
.faq{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq summary{padding:18px 22px;cursor:pointer;font-weight:700;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(--pink)}
.faq[open] summary::after{content:"–"}
.faq .a{padding:4px 22px 18px;color:#4a4640;font-size:.93rem}

/* cta band */
.cta-band{background:conic-gradient(from 180deg,var(--pink),var(--orange),var(--blue),var(--green),var(--pink));color:#fff;border-radius:20px;padding:54px 48px;text-align:center}
.cta-band h2{font-size:1.7rem;font-weight:900;text-shadow:0 2px 8px rgba(0,0,0,.2)}
.cta-band p{color:rgba(255,255,255,.94);margin:12px 0 26px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-band .btn{background:#fff;color:var(--ink);box-shadow:none}

/* page header */
.phead{padding:62px 0 34px;border-bottom:1px solid var(--line)}
.phead h1{font-size:clamp(2rem,4.6vw,3.1rem);font-weight:900;line-height:1.12}
.phead h1 em{background:linear-gradient(90deg,var(--pink),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent;font-style:normal}
.phead .lede{margin-top:16px;max-width:720px;color:var(--mut);font-size:1.04rem}
.crumb{font-size:.85rem;color:var(--mut);margin-bottom:18px}
.crumb a{color:var(--pink)}

/* footer */
footer.site{border-top:1px solid var(--line);margin-top:70px;padding:44px 0 36px;color:var(--mut);font-size:.88rem;background:#f2f1ef}
.ft{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.ft .brand{font-weight:900;color:var(--ink);font-size:1.05rem}
.ft .brand span{background:linear-gradient(90deg,var(--pink),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent}
.ft nav{display:flex;gap:20px;flex-wrap:wrap}
.ft nav a:hover{color:var(--pink)}

@media(max-width:880px){
  .g3,.g2{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:28px}
  .feat{grid-template-columns:1fr}
  .nav-toggle{display:block}
  nav.main{position:fixed;top:66px;left:0;right:0;background:#16161c;flex-direction:column;align-items:flex-start;padding:20px 26px;gap:16px;border-top:1px solid #2c2c34;display:none}
  nav.main.open{display:flex}
  .hero{padding:60px 0 52px}
  .cta-band{padding:40px 26px}
}