:root{
  --ink:#1f2933; --sub:#52606d; --line:#e4e7eb; --bg:#ffffff; --soft:#f3f7fa; --soft2:#eef3f6;
  --accent:#2f6f8f; --accent2:#245a74; --warm:#fff7ed; --warm-line:#fed7aa; --line-green:#06c755;
  --max:1040px; --text:760px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",system-ui,sans-serif;line-height:1.9;font-size:16px}
a{color:var(--accent)}
img,svg{max-width:100%;height:auto}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
main .wrap{max-width:var(--text)}
main.wide .wrap{max-width:var(--max)}
main{padding:28px 0 56px}
h1{font-size:28px;line-height:1.5;margin:8px 0 10px;text-align:center}
.lead{text-align:center;color:var(--sub);margin:0 0 28px;font-size:15px}
h2{font-size:22px;line-height:1.5;margin:44px 0 14px;padding-bottom:8px;border-bottom:2px solid var(--line)}
h3{font-size:18px;line-height:1.5;margin:28px 0 8px}
h4{font-size:16px;margin:20px 0 6px}
p{margin:0 0 16px}
ul,ol{padding-left:1.4em;margin:0 0 16px}
li{margin-bottom:6px}
strong{font-weight:700}
hr{border:0;border-top:1px solid var(--line);margin:32px 0}
blockquote{margin:0 0 16px;padding:14px 18px;background:var(--soft);border-left:4px solid var(--accent);color:var(--ink)}
table{border-collapse:collapse;width:100%;margin:0 0 18px;font-size:15px}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--soft);font-weight:700}
.note{font-size:13px;color:var(--sub)}
.muted{color:var(--sub)}

/* header */
.hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:saturate(1.2) blur(6px)}
.hd-in{display:flex;align-items:center;justify-content:space-between;height:60px;position:relative}
.brand{font-weight:700;font-size:19px;letter-spacing:.04em;color:var(--ink);text-decoration:none}
.nav{display:flex;gap:4px;align-items:center}
.nav a{color:var(--ink);text-decoration:none;font-size:14px;padding:8px 10px;border-radius:8px}
.nav a:hover{background:var(--soft)}
.nav a.on{color:var(--accent);font-weight:700}
.nav .nav-line{background:var(--line-green);color:#fff;font-weight:700;margin-left:6px;padding:8px 14px}
.menu-chk{display:none}
.menu-btn{display:none;width:40px;height:40px;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.menu-btn span{display:block;width:22px;height:2px;background:var(--ink)}
@media (max-width:860px){
  .menu-btn{display:flex}
  .nav{display:none;position:absolute;left:0;right:0;top:60px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 12px 14px;gap:0}
  .nav a{padding:12px 8px;border-bottom:1px solid var(--line);border-radius:0}
  .nav a:last-child{border-bottom:0}
  .nav .nav-line{margin:10px 0 0;text-align:center;border-radius:999px}
  .menu-chk:checked ~ .nav{display:flex}
}

/* buttons */
.btn{display:inline-block;text-decoration:none;font-weight:700;padding:14px 22px;border-radius:999px;text-align:center;line-height:1.4}
.btn-line{background:var(--line-green);color:#fff}
.btn-line small{display:block;font-weight:400;font-size:12px;opacity:.9}
.btn-ghost{border:2px solid var(--accent);color:var(--accent);background:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-block{display:block;max-width:380px;margin:0 auto}
.cta{margin:28px 0}
.cta .btn{display:block;max-width:380px;margin:0 auto 10px}
.cta .note{text-align:center;margin:6px 0 0}

/* hero (top) */
.hero{background:var(--soft);padding:36px 0 40px;margin:-28px -16px 0;padding-left:16px;padding-right:16px}
.hero-in{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center}
.hero h1{text-align:center;font-size:30px;margin:0 0 12px}
.hero .lead{text-align:center;margin-bottom:22px}
.hero-art{width:100%}
@media (max-width:860px){
  .hero-in{grid-template-columns:1fr;gap:12px}
  .hero-art{order:-1;max-width:420px;margin:0 auto}
  .hero h1{font-size:24px}
}
@media (max-width:360px){ .hero h1{font-size:22px} h1{font-size:24px} }

/* sections on top */
.sec{padding:44px 0 8px}
.sec h2{border:0;text-align:center;font-size:24px;margin:0 0 6px;padding:0}
.sec .sub{text-align:center;color:var(--sub);margin:0 0 24px;font-size:15px}
.sec-alt{background:var(--soft);margin:0 -16px;padding-left:16px;padding-right:16px;padding-bottom:40px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:0 0 10px}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 18px 16px;text-decoration:none;color:var(--ink)}
.card:hover{border-color:var(--accent)}
.card .k{display:inline-block;font-size:12px;color:var(--accent);font-weight:700;margin-bottom:6px}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;font-size:14px;color:var(--sub)}
@media (max-width:860px){ .cards{grid-template-columns:1fr 1fr} }
@media (max-width:560px){ .cards{grid-template-columns:1fr} }
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:0 0 10px}
.step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}
.step .n{display:inline-block;width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;text-align:center;line-height:32px;margin-bottom:8px}
.step h3{margin:0 0 6px;font-size:17px}
.step p{margin:0;font-size:14px}
@media (max-width:760px){ .steps{grid-template-columns:1fr} }
.promise-list{list-style:none;padding:0;margin:0 0 16px}
.promise-list li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:10px}
.promise-list li b{display:block;margin-bottom:2px}
.price{max-width:680px;margin:0 auto}
.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:760px){ .two{grid-template-columns:1fr} }
.box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px}
.box h3{margin-top:0}
.warn{background:var(--warm);border:1px solid var(--warm-line);border-radius:12px;padding:14px 16px;margin:0 0 16px}
.badge{display:inline-block;font-size:11px;font-weight:700;color:#fff;background:var(--sub);border-radius:999px;padding:2px 8px;vertical-align:middle;margin-left:6px}
.guide-list{list-style:none;padding:0;margin:0 0 20px}
.guide-list li{padding:10px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.guide-list li span{color:var(--sub);font-size:13px;white-space:nowrap}
.video{position:relative;padding-top:56.25%;background:var(--soft2);border-radius:12px;overflow:hidden;margin:0 0 8px}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--sub);font-size:14px}

/* footer */
.ft{background:var(--soft);border-top:1px solid var(--line);padding:32px 0 36px;font-size:14px;color:var(--sub)}
.ft-cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:18px}
.ft-brand{font-weight:700;color:var(--ink);font-size:17px;margin-bottom:6px}
.ft a{color:var(--sub);text-decoration:none}
.ft a:hover{text-decoration:underline}
.ft p{margin:0 0 8px}
.copy{margin-top:18px;font-size:12px}
@media (max-width:760px){ .ft-cols{grid-template-columns:1fr} }