:root{
  --bg:#fff8f2; --surface:#fff; --ink:#2e211c; --body:#4f3e36; --muted:#7a6054;
  --rose:#b5495a; --rose-dark:#7a2f3a; --rose-pale:#f6dde1;
  --orange:#e08a3e; --orange-ink:#5a3a12; --orange-pale:#fbe6cc;
  --green:#3a5647; --green-pale:#e6ede4; --line:#f0e0d3; --app:#f5efe7;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--body);font-family:"Noto Sans JP",sans-serif;font-size:16px;line-height:1.95;-webkit-font-smoothing:antialiased;padding-bottom:84px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{margin:0;color:var(--ink);text-wrap:balance;line-height:1.5}
p{margin:0;text-wrap:pretty}
ul{margin:0;padding:0;list-style:none}
section{scroll-margin-top:72px}
.nw{white-space:nowrap}
.mk{background:linear-gradient(transparent 60%,var(--rose-pale) 60%);padding:0 2px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:720px;margin:0 auto;padding:0 20px}
.sec{padding:72px 0}
.sec-white{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kick{display:block;font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--rose);margin-bottom:10px}
.h2{font-size:clamp(24px,6.4vw,32px);font-weight:900;margin-bottom:14px}
.center{text-align:center}
.lead{font-size:17px;color:var(--body)}
.cap{font-size:14px;line-height:1.8;color:var(--muted)}
.more{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--rose);border-bottom:1.5px solid currentColor;padding-bottom:1px;line-height:1.6}
.more::after{content:"";width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(-45deg);margin-left:2px}
.btn{display:inline-block;white-space:nowrap;background:var(--green);color:#fff;font-weight:700;font-size:17px;padding:16px 34px;border-radius:999px;box-shadow:0 10px 24px rgba(58,86,71,.28);text-align:center}
.btn-sm{font-size:15px;padding:10px 20px;box-shadow:0 6px 14px rgba(58,86,71,.25)}
.btn-line{display:inline-block;white-space:nowrap;border:1.5px solid var(--rose);color:var(--rose);font-weight:700;font-size:16px;padding:13px 26px;border-radius:999px}

/* header */
.hd{position:sticky;top:0;z-index:30;background:rgba(255,248,242,.94);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hd-in{max-width:1080px;margin:0 auto;padding:0 16px;height:62px;display:flex;align-items:center;gap:12px}
.brand{display:flex;align-items:center;gap:8px;margin-right:auto}
.brand b{font-size:21px;font-weight:900;color:var(--green);letter-spacing:.04em}
.brand small{font-size:12px;color:var(--muted);letter-spacing:.08em}
.hd nav{display:none;gap:22px;font-size:14px;font-weight:700}

/* phone frame */
.phone{position:relative;width:232px;background:#2b211d;border-radius:36px;padding:8px;box-shadow:0 22px 44px rgba(46,33,28,.22),inset 0 0 0 1.5px #4a3b34}
.phone .scr{position:relative;border-radius:28px;overflow:hidden;background:var(--app);aspect-ratio:390/820}
.phone .scr>img{width:100%;height:auto}
.phone.sm{width:168px;border-radius:28px;padding:6px}
.phone.sm .scr{border-radius:22px}
.duo{position:relative;width:min(100%,350px);aspect-ratio:350/515;margin:0 auto}
.duo .phone{position:absolute;width:62%;border-radius:30px;padding:7px}
.duo .phone .scr{border-radius:24px}
.duo .back{left:0;top:0}
.duo .front{right:0;top:11%}
.solo{display:flex;justify-content:center}
.note-img{font-size:12.5px;color:var(--muted);text-align:center;margin-top:10px}

/* mock screens */
.m-bar{height:44px;background:var(--green);color:#fff;font-size:13px;font-weight:700;display:flex;align-items:center;padding:0 14px;gap:8px}
.m-chat{background:#e9e1d7;height:100%;padding:0 0 16px}
.m-chat .m-bar{background:#4a3b34}
.m-day{font-size:10.5px;color:#7a6054;text-align:center;margin:12px 0 8px}
.m-msg{display:flex;gap:6px;align-items:flex-start;padding:0 10px;margin-bottom:10px}
.m-ic{flex:0 0 26px;width:26px;height:26px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center}
.m-bub{background:#fff;border-radius:4px 14px 14px 14px;padding:8px 10px;font-size:11.5px;line-height:1.6;color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.06)}
.m-bub b{color:var(--rose-dark)}
.m-bub u{color:#2f6db3;text-decoration:none}
.m-time{font-size:9.5px;color:#8a776c;align-self:flex-end;white-space:nowrap}
.m-body{padding:16px 14px;font-size:12.5px;color:var(--ink);line-height:1.7}
.m-card{background:#fff;border-radius:14px;padding:14px;box-shadow:0 1px 3px rgba(0,0,0,.05);margin-bottom:12px}
.m-row{display:flex;justify-content:space-between;gap:8px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:12.5px}
.m-row:last-child{border-bottom:0}
.m-tag{display:inline-block;font-size:10px;font-weight:700;background:var(--orange-pale);color:var(--orange-ink);border-radius:999px;padding:1px 8px}

@media (max-width:759px){
  .duo .m-ic,.duo .m-time{display:none}
  .duo .m-bub{font-size:10.5px;padding:7px 8px}
  .duo .m-msg{padding:0 8px}
}
/* hero */
.hero{padding:40px 0 56px}
.hero .kick{letter-spacing:.12em;margin-bottom:12px}
.hero h1{font-size:clamp(30px,8.4vw,48px);font-weight:900;line-height:1.42;letter-spacing:.01em}
.hero .kw{font-size:15.5px;font-weight:700;color:var(--green);margin-top:16px}
.hero .sub{font-size:17px;margin-top:6px;color:var(--body)}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.badge{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px 6px 10px;font-size:14.5px;font-weight:700;color:var(--ink);line-height:1.5}
.badge i{width:20px;height:20px;border-radius:50%;background:var(--green-pale);display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;margin-top:28px}
.hero-art{margin-top:40px}

/* worries */
.wr{display:grid;gap:14px;margin-top:28px}
.wr-c{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;display:flex;gap:14px;align-items:flex-start}
.wr-ic{flex:0 0 46px;width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center}
.tag{display:inline-block;font-size:13px;font-weight:900;color:#fff;border-radius:999px;padding:1px 12px;letter-spacing:.08em;line-height:1.8;margin-bottom:6px}
.t1{background:var(--rose-dark)} .t2{background:var(--orange-ink)} .t3{background:var(--green)}
.wr-c p{font-size:16.5px;line-height:1.8;color:var(--ink)}
.bridge{font-size:20px;font-weight:900;color:var(--ink);text-align:center;margin-top:36px;line-height:1.7}

/* features */
.ft{display:grid;gap:28px;align-items:center;margin-top:56px}
.ft-num{font-size:13px;font-weight:900;letter-spacing:.16em;color:var(--rose)}
.ft h3{font-size:15px;font-weight:700;color:var(--green);margin:6px 0 8px;letter-spacing:.04em}
.ft .catch{font-size:clamp(23px,6vw,28px);font-weight:900;color:var(--ink);line-height:1.5;margin-bottom:12px}
.ft .tx{font-size:16.5px;margin-bottom:16px}
.ft-art{order:-1}
.others{display:grid;gap:12px;margin-top:56px}
.oc{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.oc h3{font-size:17px;font-weight:900;margin-bottom:4px}
.oc p{font-size:15.5px;line-height:1.85}
.oc a{margin-top:8px;font-size:14.5px}

/* students */
.st3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:28px}
.st3 figure{margin:0;display:flex;flex-direction:column;align-items:center}
.st3 .phone{width:100%;max-width:168px;border-radius:22px;padding:5px}
.st3 .phone .scr{border-radius:18px}
.st3 figcaption{margin-top:12px;text-align:center;font-size:15px;font-weight:900;color:var(--ink);line-height:1.5}
.st3 figcaption span{display:block;width:26px;height:26px;margin:0 auto 4px;border-radius:50%;background:var(--rose);color:#fff;font-size:14px;line-height:26px}

/* import */
.imp{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}
.imp figure{margin:0}
.imp img{border-radius:14px;border:1px solid var(--line);background:#fff}
.imp figcaption{font-size:13.5px;line-height:1.7;color:var(--muted);margin-top:8px}

/* not do */
.nd{background:#fff;border:1px solid var(--line);border-radius:18px;padding:8px 20px;margin-top:24px}
.nd li{display:flex;gap:12px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line);font-size:16.5px;font-weight:700;color:var(--ink);line-height:1.7}
.nd li:last-child{border-bottom:0}
.nd li i{flex:0 0 24px;height:24px;border-radius:50%;background:var(--rose-pale);color:var(--rose);font-style:normal;font-weight:900;font-size:13px;display:flex;align-items:center;justify-content:center;margin-top:2px}

/* price */
.pc{background:#fff;border:1.5px solid var(--green);border-radius:22px;padding:28px 22px;margin-top:24px;box-shadow:0 18px 40px rgba(58,86,71,.1)}
.pc-lb{font-size:14px;font-weight:700;color:var(--green)}
.pc-yen{font-size:46px;font-weight:900;color:var(--ink);line-height:1.3;letter-spacing:.01em}
.pc-yen small{font-size:16px;font-weight:700;color:var(--body);margin-left:4px}
.pc-yr{font-size:15.5px;font-weight:700;color:var(--ink)}
.pc-yr span{color:var(--rose)}
.pc ul{margin:20px 0 4px;border-top:1px solid var(--line);padding-top:12px}
.pc li{display:flex;gap:10px;align-items:flex-start;padding:6px 0;font-size:16px;color:var(--ink);line-height:1.7}
.pc li svg{flex:0 0 auto;margin-top:5px}
.free{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:20px 0 12px}
.free div{border-radius:14px;padding:12px;text-align:center;background:var(--rose-pale);color:var(--rose-dark);font-size:13.5px;font-weight:700;line-height:1.5}
.free div b{display:block;font-size:22px;font-weight:900}
.free div:last-child{background:var(--orange-pale);color:var(--orange-ink)}

/* faq */
.faq{margin-top:24px;display:flex;flex-direction:column;gap:10px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.faq summary{list-style:none;cursor:pointer;display:flex;gap:10px;align-items:flex-start;font-size:16.5px;font-weight:700;color:var(--ink);line-height:1.7}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q";flex:0 0 auto;font-weight:900;color:var(--rose)}
.faq summary::after{content:"";flex:0 0 auto;width:8px;height:8px;margin:8px 2px 0 auto;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:transform .15s}
.faq details[open] summary::after{transform:rotate(-135deg)}
.faq details p{margin-top:10px;padding-left:22px;font-size:16px;line-height:1.9}

/* about */
.ab{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px 22px;margin-top:24px}
.ab-head{display:flex;gap:16px;align-items:center}
.ab-ph{flex:0 0 76px;width:76px;height:76px;border-radius:50%;background:var(--green-pale);display:flex;align-items:center;justify-content:center;border:2px dashed #b9c8bd}
.ab-ph-note{font-size:13px;font-weight:700;color:var(--rose)}
.ab .ph{color:var(--muted);background:repeating-linear-gradient(-45deg,#fff8f2,#fff8f2 6px,#fbefe4 6px,#fbefe4 12px);border-radius:8px;padding:2px 8px;margin-top:6px;font-size:15.5px}
.ab-co{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:15px}

/* footer */
.ft-foot{border-top:1px solid var(--line);padding:36px 0 40px;font-size:14px}
.ft-foot nav{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:14px;color:var(--body)}
.ft-foot nav a{text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:3px}
.sticky{position:fixed;left:0;right:0;bottom:0;z-index:40;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,248,242,.96);border-top:1px solid var(--line)}
.sticky a{display:block;text-align:center;background:var(--green);color:#fff;font-weight:700;font-size:16.5px;line-height:1.35;padding:11px 12px;border-radius:999px;box-shadow:0 8px 18px rgba(58,86,71,.28)}
.sticky a small{display:block;font-size:12px;font-weight:500;opacity:.92}

/* details page */
.crumb{font-size:13px;color:var(--muted);padding:14px 0 0}
.crumb a{text-decoration:underline;text-underline-offset:3px}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.toc a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:14.5px;font-weight:700;color:var(--ink)}
.dsec{padding:56px 0;border-top:1px solid var(--line)}
.dsec h2{font-size:clamp(22px,5.8vw,28px);font-weight:900;margin-bottom:10px}
.dgrid{display:grid;gap:28px;margin-top:20px;align-items:start}
.dl li{padding:14px 0;border-bottom:1px solid var(--line)}
.dl li:last-child{border-bottom:0}
.dl h3{font-size:17.5px;font-weight:900;margin-bottom:4px}
.dl p{font-size:16px;line-height:1.9}
.dl p+p{margin-top:6px}
.dl b{color:var(--ink)}
.cards{display:grid;gap:14px;margin-top:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}
.card h3{font-size:17.5px;font-weight:900;margin-bottom:6px}
.card p{font-size:16px;line-height:1.9}
.card p+p{margin-top:6px}
.case{overflow:hidden;padding:0}
.case img{width:100%;aspect-ratio:16/10;object-fit:cover}
.case .in{padding:20px}
.case .ans{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.case .ans b{display:block;color:var(--rose);font-size:16.5px;margin-bottom:4px}
.tbl{overflow-x:auto;margin-top:18px;background:#fff;border:1px solid var(--line);border-radius:14px}
.tbl table{border-collapse:collapse;min-width:640px;width:100%;font-size:14.5px}
.tbl th,.tbl td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;line-height:1.6}
.tbl th{white-space:nowrap;font-size:13px;color:var(--muted);font-weight:700}
.tbl td:first-child{font-weight:900;color:var(--ink);position:sticky;left:0;background:#fff}
.tbl tr:last-child td{border-bottom:0}
.pill{display:inline-block;font-size:12.5px;font-weight:700;border-radius:999px;padding:2px 10px;white-space:nowrap}
.p-yes{background:var(--green-pale);color:#2f4434} .p-part{background:var(--orange-pale);color:var(--orange-ink)} .p-hero{background:var(--rose);color:#fff}
.chk{display:grid;gap:22px;margin-top:20px}
.chk li{display:flex;gap:10px;align-items:flex-start;font-size:15.5px;line-height:1.7;color:var(--ink);padding:5px 0}
.chk li::before{content:"";flex:0 0 auto;width:12px;height:7px;border-left:2.4px solid var(--rose);border-bottom:2.4px solid var(--rose);transform:rotate(-45deg);margin:8px 4px 0 2px}
.steps{display:grid;gap:12px;margin-top:20px}
.steps .card{display:flex;gap:14px}
.steps .n{flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:var(--green);color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center}

@media (min-width:760px){
  body{padding-bottom:0}
  .sticky{display:none}
  .sp{display:none}
  .hd-in{padding:0 28px;height:68px}
  .hd nav{display:flex}
  .wrap{padding:0 28px}
  .sec{padding:96px 0}
  .hero{padding:72px 0 88px}
  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
  .hero-art{margin-top:0}
  .wr{grid-template-columns:repeat(3,1fr)}
  .wr-c{flex-direction:column}
  .ft{grid-template-columns:1fr 1fr;gap:56px;margin-top:88px}
  .ft-art{order:0}
  .ft.rev .ft-art{order:-1}
  .others{grid-template-columns:repeat(2,1fr)}
  .st3{gap:28px}
  .phone{width:250px}
  .duo{width:min(100%,420px)}
  .cards{grid-template-columns:1fr 1fr}
  .chk{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .steps .card{flex-direction:column}
  .dgrid{grid-template-columns:1.3fr 1fr;gap:48px}
  .dgrid.rev>:first-child{order:2}
}
@media (max-width:380px){
  .phone{width:208px}
  .badge{font-size:13.5px}
}