:root{
  --ink:#1C3D55;
  --ink-60:#5B7788;
  --ink-30:#9DB2BF;
  --paper:#FFFFFF;
  --mist:#F2F9FD;
  --line:#DEEAF1;
  --sky-deep:#3E93C9;
  --sky:#7CC4EA;
  --sky-soft:#BFE3F7;
  --sky-pale:#DDEFFA;
  --cream:#FDF3DE;
  --cream-deep:#F3E1BB;
  --sans:"IBM Plex Sans JP",-apple-system,"Hiragino Kaku Gothic ProN",sans-serif;
  --disp:"Zen Kaku Gothic New","IBM Plex Sans JP",sans-serif;
  --mono:"IBM Plex Mono","IBM Plex Sans JP",monospace;
  --gut:clamp(20px,4vw,56px);
  --sec:clamp(88px,11vw,168px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:15px;line-height:1.95;
  font-feature-settings:"palt" 1;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--sky-soft);color:var(--ink)}
:focus-visible{outline:2px solid var(--sky-deep);outline-offset:3px}

.wrap{max-width:1200px;margin:0 auto;padding:0 var(--gut);position:relative}
.sec{padding:var(--sec) 0;position:relative;overflow:hidden}
section[id]{scroll-margin-top:84px}
.sec>.wrap{z-index:1}
.sec--mist{background:var(--mist)}

/* ---------- type ---------- */
.eyebrow{
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--sky-deep);
  display:flex;align-items:center;gap:11px;line-height:1;
}
/* ロゴのダイヤ形を節の目印に転用 */
.eyebrow::before{content:"";width:9px;height:9px;background:var(--sky);transform:rotate(45deg);flex:none}
.lead{font-size:clamp(15px,1.5vw,17px);line-height:2.15;color:var(--ink-60);max-width:34em}
.h2{font-family:var(--disp);font-weight:900;font-size:clamp(28px,4.4vw,52px);line-height:1.32;letter-spacing:.01em}
.h3{font-family:var(--disp);font-weight:700;font-size:clamp(20px,2.2vw,26px);line-height:1.5}

/* 水色のにじみハイライト（ロゴの水彩から） */
.mk{
  background-image:linear-gradient(var(--sky-soft),var(--sky-soft));
  background-repeat:no-repeat;background-position:0 84%;background-size:0% .34em;
  transition:background-size .85s cubic-bezier(.19,.76,.21,1);
}
.mk.on{background-size:100% .34em}

.rv{opacity:0;transform:translateY(22px);transition:opacity .9s ease,transform .9s cubic-bezier(.19,.76,.21,1)}
.rv.on{opacity:1;transform:none}

/* ---------- header ---------- */
header{position:fixed;inset:0 0 auto 0;z-index:60;background:rgba(255,255,255,.78);backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .3s,background .3s}
header.stuck{border-bottom-color:var(--line);background:rgba(255,255,255,.92)}
.nav{max-width:1200px;margin:0 auto;padding:0 var(--gut);height:74px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:11px}
.brand img{width:30px;height:30px;animation:hover 7s ease-in-out infinite}
.brand b{font-family:var(--disp);font-weight:900;font-size:20px;letter-spacing:.03em;white-space:nowrap}
.brand b span{font-size:.6em;letter-spacing:.02em;margin-right:.3em;color:var(--ink-60)}
@keyframes hover{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-4px) rotate(4deg)}}
.nav ul{list-style:none;display:flex;gap:28px;margin-left:auto}
.nav ul a{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--ink-60);transition:color .2s;position:relative}
.nav ul a:hover{color:var(--ink)}
.nav ul a::after{content:"";position:absolute;left:0;right:0;bottom:-5px;height:3px;background:var(--sky-soft);transform:scaleX(0);transform-origin:left;transition:transform .3s}
.nav ul a:hover::after{transform:scaleX(1)}
.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:.12em;padding:11px 22px;border-radius:999px;background:var(--sky-deep);color:#fff;transition:background .25s,transform .25s}
.btn:hover{background:var(--ink);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn--ghost:hover{background:var(--ink);color:#fff}
.nav .btn{margin-left:8px}
.only-sp{display:none}
.burger{display:none;margin-left:auto;width:44px;height:44px;border:0;background:none;cursor:pointer;-webkit-tap-highlight-color:transparent}
.burger span{display:block;height:1.5px;background:var(--ink);margin:7px auto;width:22px}

/* ---------- hero : 空 ---------- */
.hero{
  position:relative;padding:clamp(148px,19vh,196px) 0 0;
  background:linear-gradient(180deg,#CDE8F8 0%,#E3F3FC 46%,#EFF8FD 100%);
  overflow:hidden;
}
.hero__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.55fr);gap:clamp(24px,5vw,72px);align-items:center;position:relative;z-index:3}
.hero h1{font-family:var(--disp);font-weight:900;font-size:clamp(30px,6.2vw,80px);line-height:1.28;letter-spacing:.005em}
.hero h1 .line{display:block;white-space:nowrap}
.ch{display:inline-block;color:inherit}
.loaded .ch{animation:glow var(--dur,5.4s) ease-in-out var(--d,0s) infinite}
.ch--arrow,.loaded .ch--arrow{animation:none;color:var(--sky-deep);font-size:.72em;margin:0 .1em;vertical-align:.12em}
@keyframes glow{0%{color:var(--ink)}9%{color:var(--tone,#3E93C9)}30%,100%{color:var(--ink)}}
.hero h1{opacity:0;transform:translateY(8px);transition:opacity .55s ease,transform .55s cubic-bezier(.16,.86,.26,1)}
.loaded .hero h1{opacity:1;transform:none}
.hero__en{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--ink-60);margin-top:26px}
.hero__en{opacity:0;transform:translateY(14px);transition:opacity .9s ease,transform .9s cubic-bezier(.16,.86,.26,1)}
.hero__en{transition-delay:.22s}
.loaded .hero__en{opacity:1;transform:none}
.hero__foot{display:flex;align-items:center;gap:16px;margin:clamp(40px,6vw,72px) 0 0;padding:22px 0 clamp(46px,7vw,86px);border-top:1px solid rgba(28,61,85,.14);position:relative;z-index:3}
.hero__foot p{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--ink-30)}
.scrollcue{margin-left:auto;font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--ink-30);display:flex;align-items:center;gap:10px}
.scrollcue::after{content:"";width:34px;height:1px;background:var(--ink-30);animation:cue 2.2s infinite}
@keyframes cue{0%{transform:scaleX(0);transform-origin:left}50%{transform:scaleX(1);transform-origin:left}51%{transform:scaleX(1);transform-origin:right}100%{transform:scaleX(0);transform-origin:right}}

/* ロゴの水彩ダイヤ：ヒーローの主役として、ゆっくり回りながら漂う */
.hero__mark{
  display:flex;align-items:center;justify-content:center;
  opacity:0;transform:scale(.92);
  transition:opacity 1.2s ease .25s,transform 1.4s cubic-bezier(.16,.86,.26,1) .25s;
}
.loaded .hero__mark{opacity:.9;transform:none}
.hero__mark__float{display:block;animation:drift 11s ease-in-out infinite}
/* 周回する語がはみ出さないよう、余白を内側に確保した箱にロゴを収める */
.orbit{
  position:relative;display:block;
  width:min(30vw,330px);aspect-ratio:1;padding:9%;
  margin:0 clamp(24px,3vw,34px);
}
.orbit img{width:100%;animation:spin 32s linear infinite}
/* 4語はロゴと同じ速さで頂点を保ったまま周回し、文字だけは常に正立させる */
.orbit__ring{position:absolute;inset:0;animation:spin 32s linear infinite}
.orbit__w{position:absolute;inset:0;display:flex;justify-content:center;align-items:flex-start;transform:rotate(var(--a))}
.orbit__fix{display:block;transform:rotate(calc(-1 * var(--a)))}
.orbit__fix i{
  display:block;font-style:normal;white-space:nowrap;
  font-family:var(--mono);font-weight:500;font-size:clamp(9.5px,1.05vw,12px);
  letter-spacing:.16em;color:var(--sky-deep);
  animation:spinrev 32s linear infinite;
}
@keyframes drift{0%,100%{transform:translateY(0)}50%{transform:translateY(-20px)}}
@keyframes spin{from{transform:rotate(0)}to{transform:rotate(360deg)}}
@keyframes spinrev{from{transform:rotate(0)}to{transform:rotate(-360deg)}}

/* 鳥 */
.birds{position:absolute;inset:0;z-index:2;pointer-events:none;overflow:hidden}
.birds.birds--sec{z-index:0}
/* 水平移動・上下のうねり・傾き・羽ばたきを別々の周期で重ね、規則性を消す */
.bird{position:absolute;left:-170px;animation:fly linear infinite}
.bird__y{animation:bob ease-in-out infinite}
.bird__r{animation:bank ease-in-out infinite}
.bird svg{width:100%;height:auto;display:block;transform-origin:62% 46%;animation:flap ease-in-out infinite}
@keyframes fly{from{transform:translate3d(0,0,0)}to{transform:translate3d(calc(100vw + 260px),0,0)}}
@keyframes bob{0%{transform:translateY(0)}17%{transform:translateY(-32px)}34%{transform:translateY(7px)}55%{transform:translateY(-21px)}78%{transform:translateY(16px)}100%{transform:translateY(0)}}
@keyframes bank{0%{transform:rotate(-5deg)}21%{transform:rotate(4deg)}47%{transform:rotate(-9deg)}72%{transform:rotate(3deg)}100%{transform:rotate(-5deg)}}
/* 数回羽ばたいて、あとは滑空する */
@keyframes flap{
  0%{transform:scaleY(1)}
  4%{transform:scaleY(.54)}
  9%{transform:scaleY(1.03)}
  14%{transform:scaleY(.58)}
  19%{transform:scaleY(1.02)}
  24%{transform:scaleY(.66)}
  30%{transform:scaleY(1)}
  100%{transform:scaleY(1)}
}

/* 雲のスカラップ（名刺裏の意匠） */
.cloudband{position:absolute;left:0;right:0;top:0;z-index:3;pointer-events:none}
.cloudband__bar{height:74px;background:#fff}
.scallop--top{transform:scaleY(-1);animation-duration:92s;animation-direction:reverse}
.scallop{
  position:relative;z-index:3;height:34px;margin-bottom:-1px;
  background:radial-gradient(circle 30px at 50% 100%,#fff 99%,transparent 100%) 0 0/60px 34px repeat-x;
  animation:cloudy 70s linear infinite;
}
@keyframes cloudy{from{background-position:0 0}to{background-position:600px 0}}

/* ---------- equation ---------- */
.eq{display:flex;align-items:stretch;flex-wrap:wrap;gap:clamp(10px,2vw,22px);margin:clamp(32px,5vw,56px) 0 clamp(28px,4vw,48px)}
.eq__t{flex:1 1 180px;background:var(--paper);border:1px solid var(--line);padding:clamp(20px,2.6vw,32px);display:flex;flex-direction:column;justify-content:space-between;min-height:150px}
.eq__t b{font-family:var(--disp);font-weight:900;font-size:clamp(22px,2.9vw,34px);line-height:1.35;display:block}
.eq__t small{font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--ink-30);text-transform:uppercase}
.eq__t--out{background:linear-gradient(150deg,var(--sky) 0%,var(--sky-deep) 100%);border-color:transparent;color:#fff}
.eq__t--out small{color:var(--cream)}
.eq__op{display:flex;align-items:center;font-family:var(--disp);font-weight:700;font-size:clamp(20px,2.4vw,30px);color:var(--sky)}

/* ---------- services ---------- */
.svc{border-top:1px solid var(--line)}
.svc__row{display:grid;grid-template-columns:120px minmax(0,1fr) minmax(0,1.25fr);gap:clamp(16px,3vw,48px);padding:clamp(30px,4vw,54px) 0;border-bottom:1px solid var(--line);transition:background .35s}
.svc__row:hover{background:var(--mist)}
.svc__code{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--sky-deep);padding-top:.65em}
.svc__row p{color:var(--ink-60);line-height:2.1;font-size:14.5px}
.svc__more{margin-top:14px}
.svc__row p.svc__more{line-height:1.6}
.svc__row .h3{position:relative;display:inline-block}
.svc__row:hover .h3{background-image:linear-gradient(var(--sky-soft),var(--sky-soft));background-repeat:no-repeat;background-position:0 82%;background-size:100% .3em}

/* ---------- media ---------- */
.prod{display:grid;gap:clamp(48px,7vw,104px);margin-top:clamp(40px,6vw,72px)}
.prod__item{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(24px,4.5vw,64px);align-items:center}
.prod__item:nth-child(even) .prod__vis{order:2}
.prod__vis{position:relative;background:var(--sky-pale);aspect-ratio:16/11;overflow:hidden}
.prod__vis img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.19,.76,.21,1)}
.prod__item:hover .prod__vis img{transform:scale(1.04)}
.prod__vis figcaption{position:absolute;left:0;top:0;background:var(--cream);color:#8A6F3E;font-family:var(--mono);font-size:10px;letter-spacing:.16em;padding:7px 13px;text-transform:uppercase}
.prod__body .h3{margin:14px 0 12px}
.prod__body p{color:var(--ink-60);font-size:14.5px;line-height:2.1}
.prod__body .link{display:inline-flex;align-items:center;gap:9px;margin-top:22px;font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--sky-deep)}
.prod__body .link::after{content:"→";transition:transform .3s}
.prod__body .link:hover::after{transform:translateX(6px)}

/* ---------- works ---------- */
.works{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:clamp(32px,5vw,56px)}
.works a{background:var(--paper);padding:clamp(22px,3vw,38px);display:flex;flex-direction:column;gap:16px;transition:background .3s}
.works a:hover{background:var(--mist)}
.works img{width:56px;height:56px;object-fit:contain;background:var(--mist)}
.works b{font-family:var(--disp);font-weight:700;font-size:15px;line-height:1.5}
.works small{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--ink-30);margin-top:auto;text-transform:uppercase}

/* ---------- news ---------- */
.news{border-top:1px solid var(--line);margin-top:clamp(30px,4vw,48px)}
.news a{display:grid;grid-template-columns:130px 110px minmax(0,1fr);gap:clamp(12px,2vw,28px);align-items:baseline;padding:24px 0;border-bottom:1px solid var(--line);transition:padding-left .3s}
.news a:hover{padding-left:10px}
.news time{font-family:var(--mono);font-size:12px;color:var(--ink-30);letter-spacing:.08em}
.news em{font-style:normal;font-family:var(--mono);font-size:10px;letter-spacing:.14em;border:1px solid var(--line);padding:4px 9px;color:var(--ink-60);justify-self:start}
.news p{font-size:14.5px;font-weight:500}

/* ---------- contact + 名刺 ---------- */
.cta__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.86fr);gap:clamp(36px,6vw,88px);align-items:center}
.cta .h2{font-size:clamp(30px,5vw,58px);margin:20px 0 24px}
.cta__acts{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}

.card{perspective:1400px;width:100%;max-width:400px;margin-inline:auto;aspect-ratio:1.655}
.card__in{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform 1.15s cubic-bezier(.3,.8,.25,1)}
.card.flip .card__in{transform:rotateY(180deg)}
.card__f,.card__b{position:absolute;inset:0;backface-visibility:hidden;overflow:hidden;border-radius:3px;box-shadow:0 14px 34px rgba(28,61,85,.14)}
.card__f{background:linear-gradient(155deg,#9FD5F0 0%,#7CC4EA 52%,#A9DCF3 100%)}
.card__b{background:linear-gradient(155deg,#7CC4EA 0%,#5FB2E2 100%);transform:rotateY(180deg)}
.card__mark{position:absolute;left:50%;top:50%;width:47%;transform:translate(-50%,-50%);opacity:.62}
.card__name{position:absolute;left:7%;bottom:12%;font-family:var(--disp);font-weight:700;color:var(--cream);font-size:clamp(13px,1.5vw,17px);letter-spacing:.06em;line-height:1.5}
.card__name span{display:block;font-size:.62em;font-weight:500;letter-spacing:.12em;opacity:.85}
.card__bird{position:absolute;width:15%;opacity:.92}
.card__cloudlet{position:absolute;background:var(--cream);border-radius:50%;opacity:.92}
.card__cloud{position:absolute;right:0;top:0;bottom:0;width:32%;background:#fff}
.card__cloud::before{content:"";position:absolute;right:100%;top:0;bottom:0;width:22px;background:radial-gradient(circle 11px at 100% 50%,#fff 99%,transparent 100%) 0 0/22px 22px repeat-y}
.card__info{position:absolute;left:8%;top:22%;color:#fff;line-height:2.05}
.card__info b{display:block;font-family:var(--disp);font-weight:700;font-size:clamp(13px,1.5vw,16px);letter-spacing:.06em;margin-bottom:10px}
.card__info small{display:block;font-family:var(--mono);font-size:clamp(8px,.85vw,10px);letter-spacing:.08em;opacity:.95;line-height:1.9}
.card__hint{text-align:center;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:var(--ink-30);margin-top:18px}

footer{border-top:1px solid var(--line);padding:clamp(44px,6vw,72px) 0 32px}
.foot{display:flex;flex-wrap:wrap;gap:32px;justify-content:space-between;align-items:flex-start}
.foot nav{display:flex;gap:26px;flex-wrap:wrap}
.foot nav a{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--ink-60)}
.foot nav a:hover{color:var(--ink)}
.copy{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--ink-30);margin-top:40px}


/* ---------- 下層ページ共通 ---------- */
.phead{position:relative;padding:clamp(150px,19vh,192px) 0 0;background:linear-gradient(180deg,#CDE8F8 0%,#E3F3FC 46%,#EFF8FD 100%);overflow:hidden}
.phead .wrap{padding-bottom:clamp(46px,7vw,84px);z-index:3}
.phead__t{font-family:var(--disp);font-weight:900;font-size:clamp(32px,5.4vw,64px);line-height:1.3;letter-spacing:.01em;margin:20px 0 0}
.phead__t .line{display:block}
.phead__lead{margin-top:22px;color:var(--ink-60);max-width:32em;font-size:clamp(14.5px,1.4vw,16px);line-height:2.1}

.link{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--sky-deep)}
.link::after{content:"→";transition:transform .3s}
.link:hover::after{transform:translateX(6px)}
.nav ul a.on{color:var(--ink)}
.nav ul a.on::after{transform:scaleX(1)}

.ctable{border-top:1px solid var(--line);margin-top:clamp(28px,4vw,44px)}
.ctable div{display:grid;grid-template-columns:220px minmax(0,1fr);gap:clamp(12px,2vw,32px);padding:20px 0;border-bottom:1px solid var(--line)}
.ctable dt{font-size:12.5px;letter-spacing:.08em;color:var(--ink-30);padding-top:.35em}
.ctable dd{font-size:15px;line-height:2}
.ctable .todo{color:var(--ink-30)}

.steps{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:clamp(28px,4vw,48px);grid-template-columns:repeat(4,1fr)}
.steps article{background:var(--paper);padding:clamp(22px,2.6vw,32px);display:flex;flex-direction:column;gap:12px}
.steps span{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--sky-deep)}
.steps b{font-family:var(--disp);font-weight:700;font-size:17px;line-height:1.5}
.steps p{font-size:14px;color:var(--ink-60);line-height:2}

.detail{border-top:1px solid var(--line);margin-top:clamp(28px,4vw,48px)}
.detail article{padding:clamp(34px,4.5vw,58px) 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.3fr);gap:clamp(20px,4vw,60px)}
.detail h2{font-family:var(--disp);font-weight:900;font-size:clamp(24px,3vw,36px);line-height:1.4}
.detail .eyebrow{margin-bottom:14px}
.detail p{color:var(--ink-60);font-size:15px;line-height:2.1}
.detail ul{margin-top:20px;list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.detail li{font-family:var(--mono);font-size:11px;letter-spacing:.1em;border:1px solid var(--line);border-radius:999px;padding:6px 14px;color:var(--ink-60)}

.worklist{border-top:1px solid var(--line);margin-top:clamp(28px,4vw,48px)}
.worklist article{display:grid;grid-template-columns:120px minmax(0,1fr) minmax(0,1.1fr);gap:clamp(16px,3vw,48px);padding:clamp(28px,3.6vw,46px) 0;border-bottom:1px solid var(--line);align-items:start}
.worklist img{width:72px;height:72px;object-fit:contain;background:var(--mist)}
.worklist small{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--ink-30);text-transform:uppercase;margin-top:8px}
.worklist p{color:var(--ink-60);font-size:14.5px;line-height:2.05}


/* ---------- お問い合わせフォーム ---------- */
.form{margin-top:clamp(26px,4vw,44px);max-width:820px}
.form__row{display:grid;grid-template-columns:210px minmax(0,1fr);gap:clamp(12px,2vw,32px);padding:22px 0;border-bottom:1px solid var(--line)}
.form__row:first-child{border-top:1px solid var(--line)}
.form__row>.lbl{font-size:13.5px;font-weight:500;display:flex;align-items:flex-start;gap:9px;padding-top:13px}
.badge{font-family:var(--mono);font-size:9px;letter-spacing:.06em;color:#fff;background:var(--sky-deep);border-radius:3px;padding:4px 6px;line-height:1;margin-top:3px;flex:none}
.badge--opt{background:var(--ink-30)}
.form input[type=text],.form input[type=email],.form input[type=tel],.form textarea{
  width:100%;font-family:inherit;font-size:15px;color:var(--ink);background:var(--paper);
  border:1px solid var(--line);border-radius:4px;padding:13px 14px;line-height:1.7;
  transition:border-color .2s,box-shadow .2s;
}
.form textarea{min-height:180px;resize:vertical}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--sky-deep);box-shadow:0 0 0 3px rgba(62,147,201,.16)}
.form input::placeholder,.form textarea::placeholder{color:var(--ink-30)}
.form input.ng,.form textarea.ng{border-color:#C2643F}
.checks{display:flex;flex-wrap:wrap;gap:9px}
.checks label{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:999px;padding:10px 17px;font-size:13.5px;cursor:pointer;background:var(--paper);transition:border-color .2s,background .2s}
.checks input{accent-color:var(--sky-deep);width:15px;height:15px;margin:0}
.checks label:hover{border-color:var(--sky)}
.err{color:#B3543A;font-size:12.5px;margin-top:8px;display:none}
.err.on{display:block}
.form__foot{margin-top:clamp(26px,3.4vw,40px);display:flex;flex-direction:column;align-items:center;gap:18px;text-align:center}
.agree{display:inline-flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-60);cursor:pointer}
.agree input{accent-color:var(--sky-deep);width:16px;height:16px;margin:0}
.submit{border:0;cursor:pointer;font-family:var(--mono);font-size:13px;letter-spacing:.14em;padding:17px 48px;border-radius:999px;background:var(--sky-deep);color:#fff;transition:background .25s,transform .25s}
.submit:hover{background:var(--ink);transform:translateY(-1px)}
.form__note{font-size:12px;color:var(--ink-30);line-height:1.9;max-width:34em}
.done{display:none;border:1px solid var(--line);background:var(--paper);padding:clamp(38px,5vw,64px);text-align:center;margin-top:clamp(26px,4vw,44px)}
.done.on{display:block}
.done b{display:block;font-family:var(--disp);font-weight:900;font-size:clamp(20px,2.4vw,28px);margin-bottom:14px}
.done p{color:var(--ink-60);font-size:14.5px;line-height:2.05}

.formhead{margin-top:clamp(44px,5vw,72px)}
.mailto{color:var(--sky-deep);border-bottom:1px solid rgba(62,147,201,.3);padding-bottom:2px}
.mailto:hover{border-bottom-color:var(--sky-deep)}
.contactbox{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.86fr);gap:clamp(36px,6vw,80px);align-items:start;margin-top:0}

/* ---------- タブレット ---------- */
@media(max-width:900px){
  .hero__grid{grid-template-columns:1fr;align-items:start}
  .hero__mark{margin-top:36px}
  .orbit{width:46vw}
  .loaded .hero__mark{opacity:.8}
  .svc__row{grid-template-columns:1fr;gap:12px}
  .svc__code{padding-top:0}
  .prod__item{grid-template-columns:1fr}
  .prod__item:nth-child(even) .prod__vis{order:0}
  .works{grid-template-columns:repeat(2,1fr)}
  .news a{grid-template-columns:1fr;gap:8px}
  .cta__grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .detail article{grid-template-columns:1fr;gap:16px}
  .worklist article{grid-template-columns:1fr;gap:14px}
  .contactbox{grid-template-columns:1fr}

  .nav ul,.nav .btn{display:none}
  .burger{display:block}
  .only-sp{display:list-item}
  .nav.open ul{display:flex;position:absolute;top:74px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:6px var(--gut) 20px}
  .nav.open ul a{display:block;padding:15px 0;font-size:13.5px}
  .nav.open .only-sp a{color:var(--sky-deep)}
}

/* ---------- スマートフォン（MFI基準の主戦場） ---------- */
@media(max-width:600px){
  :root{--gut:22px;--sec:clamp(68px,15vw,92px)}
  body{font-size:15px;line-height:1.9}
  section[id]{scroll-margin-top:70px}

  /* ヘッダー：高さを下げ、指で押せる大きさを確保 */
  .nav{height:62px}
  .brand img{width:26px;height:26px}
  .brand b{font-size:17px}
  .brand b span{font-size:.56em}
  .nav.open ul{top:62px}

  /* 雲：画面幅に対して大きすぎたので粒を小さく */
  .cloudband__bar{height:62px}
  .scallop{height:22px;background:radial-gradient(circle 20px at 50% 100%,#fff 99%,transparent 100%) 0 0/40px 22px repeat-x}

  /* ファーストビュー：1画面で見出しとロゴが収まる高さに */
  .hero{padding-top:112px}
  .hero h1{font-size:clamp(30px,10vw,46px);line-height:1.34}
  .hero__en{font-size:11px;letter-spacing:.14em;margin-top:20px;line-height:1.9}
  .hero__mark{margin-top:26px}
  .orbit{width:52vw}
  .orbit__fix i{font-size:10px;letter-spacing:.12em}
  .hero__foot{margin-top:30px;padding:16px 0 40px}
  .hero__foot p{font-size:9.5px;letter-spacing:.12em}
  .scrollcue{font-size:9.5px}

  /* 見出し・本文：読める大きさを優先 */
  .h2{font-size:26px;line-height:1.45}
  .h3{font-size:19px}
  .lead{font-size:15px;line-height:2.05}
  .svc__row p,.prod__body p{font-size:15px;line-height:2.05}
  .svc__row{padding:26px 0}
  .eyebrow{font-size:10px;letter-spacing:.18em}

  /* 数式ブロック：横並びだと潰れるため縦積みに */
  .eq{flex-direction:column;gap:10px;margin:28px 0 26px}
  .eq__t{min-height:0;padding:18px 20px;flex:none}
  .eq__t b{font-size:24px}
  .eq__op{justify-content:center;font-size:20px;line-height:1}

  /* 一覧系：指で押せる余白を確保 */
  .works{grid-template-columns:repeat(2,1fr)}
  .works a{padding:20px 16px;gap:12px}
  .works img{width:46px;height:46px}
  .works b{font-size:14px}
  .news a{padding:18px 0}
  .news p{font-size:15px;line-height:1.8}
  .prod__body .link{margin-top:16px;padding:8px 0;font-size:12.5px}
  .prod__vis{aspect-ratio:16/10}

  /* ボタン：44px以上のタップ領域 */
  .btn{padding:14px 22px;font-size:12px}
  .cta__acts{gap:10px}
  .cta__acts .btn{flex:1 1 100%;justify-content:center}

  /* 名刺：文字が潰れないよう再調整 */
  .card{max-width:100%}
  .card__name{font-size:15px}
  .card__info b{font-size:14px}
  .card__info small{font-size:9.5px;line-height:1.85}
  .card__hint{font-size:9.5px;margin-top:14px}


  .phead{padding-top:112px}
  .phead__t{font-size:clamp(28px,9vw,40px)}
  .phead__lead{font-size:15px;margin-top:18px}
  .ctable div{grid-template-columns:1fr;gap:2px;padding:16px 0}
  .ctable dt{padding-top:0}
  .steps{grid-template-columns:1fr}
  .worklist img{width:56px;height:56px}

  /* --- タップ領域を44px以上に --- */
  .brand{padding:6px 0}
  .link{padding:11px 0}
  .mailto{display:inline-block;padding:10px 0}
  .agree{padding:10px 0}
  .news a{padding:20px 0}
  /* --- 小さすぎるラベルの底上げ --- */
  .eyebrow{font-size:11px;letter-spacing:.16em}
  .works small,.worklist small,.news em{font-size:11px}
  .orbit__fix i{font-size:11px;letter-spacing:.1em}
  .brand b span{font-size:.62em}
  .card__hint{font-size:10.5px}
  .scrollcue{font-size:10.5px}
  .eq__t small{font-size:10.5px}
  /* --- FV下部：長い英字ラベルは畳んで、余白も詰める --- */
  .hero__foot p{display:none}
  .scrollcue{margin-left:0}
  .hero__foot{margin-top:22px;padding:14px 0 34px}
  .hero__mark{margin-top:14px}
  .hero__en{line-height:2}
  .form__row{grid-template-columns:1fr;gap:8px;padding:18px 0}
  .form__row>.lbl{padding-top:0}
  .submit{width:100%;padding:17px 0}
  .checks label{padding:11px 15px;font-size:13px}


  footer{padding:40px 0 28px}
  .foot{gap:22px}
  .foot nav{gap:18px 20px}
  .copy{margin-top:26px}
}

/* ---------- 小型端末 ---------- */
@media(max-width:360px){
  .hero h1{font-size:29px}
  .works{grid-template-columns:1fr}
  .hero__foot p{display:none}
  .scrollcue{margin-left:0}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
  .hero h1{opacity:1;transform:none}
  .hero h1 .ch{color:var(--ink)}
  .hero__en{opacity:1;transform:none}
  .loaded .hero__mark{opacity:.9;transform:none}
  .cloudband,.scallop{animation:none}
  .mk{background-size:100% .34em}
}