:root{
  --bg:#f5f9fb;--bg2:#e6f0f4;--paper:#ffffff;--ink:#22303a;--muted:#6f818c;--line:#d7e3e9;
  --aqua:#6fa7b8;--aqua2:#a9cfdb;--navy:#1d2c36;
  --cta:#2e6273;--cta-hover:#244f5d;--cta-shadow:rgba(46,98,115,.75);
  --font-head:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic",sans-serif;
  --font-body:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic",sans-serif;
  --font-en:"Jost","Helvetica Neue",Arial,sans-serif;
  --font-num:"Jost","Helvetica Neue",Arial,sans-serif;
}
body{letter-spacing:.05em}
.en{font-family:var(--font-en);font-weight:300;letter-spacing:.24em}
.sec{padding:120px 0;position:relative}
@media (max-width:640px){.sec{padding:84px 0}}
.sec-head{margin-bottom:60px}
.sec-head.c{text-align:center}
.sec-head .en{display:block;font-size:12px;color:var(--aqua);margin-bottom:16px;font-weight:400;letter-spacing:.34em}
.sec-head h2{font-family:var(--font-head);font-weight:500;font-size:clamp(24px,3.2vw,36px);line-height:1.6;letter-spacing:.1em}
.sec-head p{margin-top:20px;color:var(--muted);font-size:14px}

/* header */
.hd{position:absolute;top:0;left:0;right:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:24px 40px}
.hd__logo{font-family:var(--font-en);font-weight:300;font-size:24px;letter-spacing:.42em;text-decoration:none;line-height:1.2}
.hd__logo small{display:block;font-size:9px;letter-spacing:.3em;color:var(--muted);margin-top:4px}
.hd__cta{font-size:12.5px;letter-spacing:.12em;text-decoration:none;padding:10px 22px;border-radius:999px;background:var(--navy);color:#fff}
@media (max-width:640px){.hd{padding:16px 20px}.hd__logo{font-size:20px}.hd__cta{display:none}}
main{position:relative}

/* FV */
.fv{position:relative;min-height:max(740px,100svh);background:radial-gradient(120% 80% at 75% 40%,#ffffff 0%,#eaf3f6 45%,#d6e7ee 100%);overflow:hidden;display:flex;align-items:center}
.fv canvas{position:absolute;inset:0;width:100%;height:100%;z-index:1}
.fv__big{position:absolute;right:-2%;bottom:-6%;font-family:var(--font-en);font-weight:200;font-size:min(30vw,420px);line-height:.8;color:rgba(111,167,184,.12);letter-spacing:-.02em;z-index:0;user-select:none}
.fv__in{position:relative;z-index:2;width:100%;max-width:1240px;margin:0 auto;padding:120px 40px 120px;display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center}
.fv__label{display:inline-flex;align-items:center;gap:12px;font-size:12px;letter-spacing:.16em;color:var(--muted)}
.fv__label .en{color:var(--cta);font-size:12px;font-weight:400}
.fv__label i{width:36px;height:1px;background:var(--aqua)}
.fv h1{font-family:var(--font-head);font-weight:500;font-size:clamp(34px,4.4vw,58px);line-height:1.5;letter-spacing:.08em;margin-top:26px}
.fv h1 .fz{display:inline-block;background:linear-gradient(90deg,var(--cta),var(--aqua));-webkit-background-clip:text;background-clip:text;color:transparent}
.fv__lead{margin-top:26px;font-size:15px;line-height:2.05;color:#43535e;max-width:470px}
.fv__chips{display:grid;grid-template-columns:repeat(4,auto);justify-content:start;gap:10px;margin-top:34px}
.chip{border-radius:14px;background:rgba(255,255,255,.75);border:1px solid var(--line);padding:12px 14px;text-align:center;font-size:11px;line-height:1.5;color:var(--muted);min-width:96px}
.chip b{display:block;font-size:15px;color:var(--ink);font-weight:700;letter-spacing:.04em}
.fv__vis{position:relative;height:620px;display:flex;align-items:center;justify-content:center}
.fv__vis::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.95),rgba(255,255,255,0) 70%)}
.fv__vis img{position:relative;height:560px;filter:drop-shadow(0 30px 30px rgba(30,60,80,.25)) drop-shadow(0 4px 4px rgba(30,60,80,.15));animation:float 6s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-14px) rotate(-2deg)}}
.fv__price{position:absolute;left:0;bottom:70px;background:var(--navy);color:#fff;border-radius:18px;padding:16px 20px;font-size:11.5px;line-height:1.5;box-shadow:0 20px 40px -20px rgba(29,44,54,.8)}
.fv__price b{font-family:var(--font-num);font-weight:400;font-size:34px;letter-spacing:.02em;display:block;line-height:1.15}
.fv__price small{font-size:11px;opacity:.75}
.fv__note{position:absolute;left:0;right:0;bottom:16px;z-index:2;max-width:1240px;margin:0 auto;padding:0 40px}
@media (max-width:900px){
  .fv{min-height:auto;display:block}
  .fv__in{grid-template-columns:1fr;padding:96px 22px 20px;gap:0}
  .fv h1{font-size:clamp(29px,8.4vw,40px);margin-top:18px}
  .fv__lead{font-size:13.5px;margin-top:16px}
  .fv__chips{grid-template-columns:repeat(4,1fr);gap:6px;margin-top:22px}
  .chip{min-width:0;padding:10px 4px;font-size:9.5px}.chip b{font-size:13px}
  .fv__vis{height:420px;margin-top:6px}
  .fv__vis::before{width:300px;height:300px}
  .fv__vis img{height:380px}
  .fv__price{left:0;bottom:40px;padding:12px 16px}.fv__price b{font-size:28px}
  .fv__big{font-size:46vw;bottom:auto;top:52%}
  .fv__note{position:relative;padding:0 22px 22px;bottom:auto}
}

/* FV下CTA */
.fv-cta{background:var(--paper);padding:30px 0 34px;border-bottom:1px solid var(--line)}
.fv-cta .btn-cta{max-width:560px}

/* problem */
.problem{background:var(--paper)}
.problem__grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:center}
.problem__ph{position:relative}
.problem__ph img{border-radius:24px;aspect-ratio:4/5;object-fit:cover;width:100%;filter:saturate(.85) brightness(1.03)}
.problem__ph::after{content:"";position:absolute;right:-22px;bottom:-22px;width:46%;height:46%;border-radius:24px;background:var(--bg2);z-index:-1}
.problem__list li{display:flex;gap:18px;align-items:flex-start;padding:22px 0;border-bottom:1px solid var(--line);font-size:15.5px;line-height:1.75}
.problem__list li:first-child{border-top:1px solid var(--line)}
.problem__list .no{font-family:var(--font-en);font-size:13px;color:var(--aqua);letter-spacing:.1em;padding-top:3px;flex:none;width:34px}
.problem__list small{display:block;font-size:12.5px;color:var(--muted)}
.problem__ans{margin-top:40px;padding:28px 30px;border-radius:20px;background:linear-gradient(120deg,#e9f3f7,#f6fbfc);font-size:15px;line-height:2}
.problem__ans b{font-size:19px;color:var(--cta);font-weight:700;display:block;letter-spacing:.06em;margin-bottom:4px}
@media (max-width:900px){.problem__grid{grid-template-columns:1fr;gap:48px}.problem__ph{width:82%;margin:0 auto}.problem__list li{font-size:14.5px}}

/* why（ダーク） */
.why{background:var(--navy) url(../assets/img/bubbles-dark.jpg) right center/auto 100% no-repeat;color:#e8f1f5;overflow:hidden}
.why::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(29,44,54,1) 35%,rgba(29,44,54,.75) 60%,rgba(29,44,54,.35) 100%)}
.why .wrap{position:relative}
.why .sec-head h2{color:#fff}
.why .sec-head p{color:#a9bcc6}
.why__list{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;max-width:1000px}
.why__item{border:1px solid rgba(169,207,219,.3);border-radius:22px;padding:30px 28px;background:rgba(29,44,54,.55)}
.why__num{font-family:var(--font-en);font-weight:200;font-size:56px;line-height:1;color:var(--aqua2)}
.why__item h3{font-size:19px;font-weight:700;line-height:1.6;margin:18px 0 12px;color:#fff;letter-spacing:.06em}
.why__item p{font-size:13.5px;line-height:2;color:#bcd0d9}
.why__note{margin-top:26px;font-size:11px;color:#8ea5b0}
@media (max-width:900px){.why{background-size:cover;background-position:70% center}.why::before{background:rgba(29,44,54,.86)}.why__list{grid-template-columns:1fr;gap:14px}.why__num{font-size:44px}}

/* foam（泡の質感） */
.foam{background:var(--bg)}
.foam__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.foam__ph{border-radius:50%;overflow:hidden;aspect-ratio:1;max-width:500px;margin:0 auto;box-shadow:0 30px 60px -30px rgba(30,60,80,.5)}
.foam__ph img{width:100%;height:100%;object-fit:cover;filter:saturate(.8) hue-rotate(-8deg) brightness(1.08)}
.foam__txt h2{font-size:clamp(24px,3vw,34px);font-weight:500;line-height:1.6;letter-spacing:.08em}
.foam__txt p{margin-top:22px;font-size:14.5px;line-height:2.1;color:#43535e}
.ing{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.ing span{font-size:12px;padding:6px 14px;border-radius:999px;background:var(--paper);border:1px solid var(--line)}
@media (max-width:900px){.foam__grid{grid-template-columns:1fr;gap:40px}.foam__ph{width:80%}}

/* how to */
.howto{background:var(--paper)}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.flow li{background:var(--bg);border-radius:22px;padding:30px 22px 28px;text-align:center;position:relative}
.flow li:not(:last-child)::after{content:"";position:absolute;right:-14px;top:50%;width:10px;height:10px;border-top:1.5px solid var(--aqua);border-right:1.5px solid var(--aqua);transform:translateY(-50%) rotate(45deg);z-index:2}
.flow .en{font-size:12px;color:var(--aqua)}
.flow svg{width:84px;height:84px;margin:14px auto 16px;display:block}
.flow h3{font-size:16px;font-weight:700;letter-spacing:.06em}
.flow p{font-size:12.5px;line-height:1.85;color:var(--muted);margin-top:8px}
.howto__caution{margin-top:28px;border:1px solid var(--line);border-radius:14px;padding:16px 20px;font-size:12px;line-height:1.85;color:var(--muted)}
@media (max-width:900px){.flow{grid-template-columns:1fr 1fr;gap:12px}.flow li{padding:22px 12px}.flow li::after{display:none}.flow svg{width:64px;height:64px}.flow h3{font-size:14px}}

/* with ÉLUNE */
.with{background:linear-gradient(180deg,var(--bg2),var(--bg))}
.with__card{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;background:var(--paper);border-radius:28px;padding:50px 56px;max-width:1000px;margin:0 auto}
.with__vis{position:relative;height:300px}
.with__vis img{position:absolute;bottom:20px;filter:drop-shadow(0 16px 14px rgba(30,40,50,.22))}
.with__vis .c{height:270px;left:4%;z-index:3}
.with__vis .l{height:200px;left:34%}
.with__vis .s{height:168px;left:54%}
.with__vis .k{height:72px;left:68%;bottom:16px;z-index:2}
.with__txt .en{font-size:12px;color:var(--aqua)}
.with__txt h2{font-size:clamp(21px,2.6vw,28px);font-weight:500;line-height:1.7;margin:12px 0 18px;letter-spacing:.06em}
.with__txt p{font-size:14px;line-height:2;color:#43535e}
.with__txt a{display:inline-block;margin-top:20px;font-size:13px;color:var(--cta);text-decoration:none;border-bottom:1px solid var(--cta)}
@media (max-width:900px){.with__card{grid-template-columns:1fr;padding:30px 20px;gap:24px}.with__vis{height:240px}.with__vis .c{height:210px}.with__vis .l{height:156px}.with__vis .s{height:130px}.with__vis .k{height:56px}}

/* offer */
.offer{background:var(--navy);color:#fff}
.offer .sec-head h2{color:#fff}
.offer .sec-head p{color:#a9bcc6}
.offer__wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px;align-items:center;max-width:1040px;margin:0 auto}
.offer__vis{position:relative;height:520px;display:flex;align-items:center;justify-content:center}
.offer__vis::before{content:"";position:absolute;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(169,207,219,.35),transparent 70%)}
.offer__vis img{position:relative;height:470px;filter:drop-shadow(0 26px 26px rgba(0,0,0,.4))}
.offer__vis .gift{position:absolute;right:4%;bottom:40px;height:120px;filter:drop-shadow(0 10px 10px rgba(0,0,0,.3))}
.offer__vis .gift-l{position:absolute;right:0;bottom:24px;font-size:10.5px;background:#fff;color:var(--navy);border-radius:999px;padding:3px 10px;font-weight:700}
.plans{display:grid;gap:14px}
.plan{position:relative;border:1.5px solid rgba(169,207,219,.35);border-radius:20px;padding:24px 26px;cursor:pointer;transition:.25s;background:rgba(255,255,255,.04)}
.plan.is-active{border-color:var(--aqua2);background:rgba(169,207,219,.14)}
.plan:focus-visible{outline:2px solid var(--aqua2);outline-offset:2px}
.plan__radio{position:absolute;top:26px;right:24px;width:22px;height:22px;border-radius:50%;border:1.5px solid rgba(255,255,255,.4)}
.plan.is-active .plan__radio{border-color:var(--aqua2);background:radial-gradient(circle,var(--aqua2) 0 6px,transparent 7px)}
.plan__rec{display:inline-block;background:var(--aqua2);color:var(--navy);font-size:11px;font-weight:700;padding:2px 12px;border-radius:999px;margin-bottom:8px}
.plan__name{font-size:16px;font-weight:700;letter-spacing:.06em}
.plan__price{font-family:var(--font-num);font-weight:300;font-size:46px;line-height:1.15;margin-top:4px}
.plan__price small{font-family:var(--font-body);font-size:12px;opacity:.7;margin-left:4px}
.plan__off{display:inline-block;font-family:var(--font-body);font-size:12px;font-weight:700;background:#fff;color:var(--navy);padding:2px 10px;border-radius:4px;margin-left:8px;vertical-align:middle}
.plan ul{font-size:12.5px;line-height:1.85;color:#bcd0d9;margin-top:6px}
.plan ul li::before{content:"・";color:var(--aqua2)}
.offer__guard{display:flex;gap:8px;margin:22px 0 26px;flex-wrap:wrap}
.offer__guard li{flex:1;min-width:120px;text-align:center;border-radius:12px;background:rgba(255,255,255,.07);padding:12px 6px;font-size:12px;line-height:1.5}
.offer__guard b{display:block;font-size:14px}
.offer .btn-cta{background:#fff;color:var(--navy);max-width:none}
.offer .btn-cta .arrow{background:var(--navy)}
.offer .btn-cta:hover{background:#eaf4f7}
.offer .btn-cta-sub,.offer .note{color:#8ea5b0}
@media (max-width:900px){.offer__wrap{grid-template-columns:1fr;gap:10px}.offer__vis{height:360px}.offer__vis img{height:330px}.offer__vis .gift{height:90px}.plan__price{font-size:40px}}

/* faq */
.faq{background:var(--bg)}
.faq__list{max-width:820px;margin:0 auto}
.faq details{background:var(--paper);border-radius:16px;margin-bottom:10px}
.faq summary{list-style:none;cursor:pointer;padding:22px 54px 22px 26px;position:relative;font-size:15px;font-weight:500;line-height:1.7}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-family:var(--font-en);font-weight:300;font-size:26px;color:var(--aqua);transition:.3s}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq details p{padding:0 26px 24px;font-size:13.5px;line-height:2;color:#43535e}

/* final */
.final{position:relative;text-align:center;padding:120px 0 130px;background:radial-gradient(100% 90% at 50% 100%,#d6e7ee,#f5f9fb 60%);overflow:hidden}
.final canvas{position:absolute;inset:0;width:100%;height:100%}
.final .wrap{position:relative}
.final h2{font-size:clamp(24px,3.4vw,38px);font-weight:500;line-height:1.7;letter-spacing:.1em}
.final p{margin:20px auto 38px;font-size:14px;color:#43535e}

.ft{background:var(--navy);color:#a9bcc6;padding:56px 0 120px;font-size:12px;text-align:center}
.ft__logo{font-family:var(--font-en);font-weight:300;font-size:22px;letter-spacing:.42em;color:#fff}
.ft nav{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 24px;margin:24px 0}
.ft nav a{text-decoration:none}
.ft small{color:#6f818c}

/* --- 調整 --- */
.fv h1{font-size:clamp(29px,3.5vw,50px)}
.why{background-size:cover;background-position:right center}
.foam__txt p.note{font-size:11px;line-height:1.7;margin-top:14px;color:var(--muted)}
.with__txt h2{font-size:clamp(20px,2.2vw,25px)}
.problem__ph img{object-position:50% 30%}
.offer__vis .gift{height:170px;right:8%}@media (max-width:900px){.offer__vis .gift{height:110px}}
@media (max-width:900px){.fv__vis{justify-content:flex-start;padding-left:10%}.fv__price{left:auto;right:0;bottom:30px}}