:root{--navy:#1b3557;--navy-d:#12263f;--gold:#c9a96e;--gold-l:#f6efe0;--sky:#4fa3d1;--sky-l:#e6f3fa;--sage:#6fae9d;--sage-l:#e8f4f0;--peach:#ef9f7b;--peach-l:#fdf0e9;--ink:#26323f;--mute:#5d6b7a;--line:#e3e0d8;--bg:#fff;--alt:#f7f5ef}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:112px}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN","Yu Gothic UI","Yu Gothic",Meiryo,sans-serif;color:var(--ink);background:var(--bg);line-height:1.85;font-size:16px;-webkit-text-size-adjust:100%;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy)}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:100}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
h1,h2,h3,h4,h5{color:var(--navy);line-height:1.5;margin:0 0 .6em}
h1{font-size:clamp(28px,5.4vw,52px);font-weight:800;letter-spacing:.02em}
h2{font-size:clamp(22px,3.2vw,34px);font-weight:800;padding-bottom:.35em;background:linear-gradient(90deg,var(--gold),var(--sky)) left bottom/72px 3px no-repeat}
h3{font-size:clamp(18px,2.2vw,22px)}h4{font-size:17px}h5{font-size:16px;margin-bottom:.3em}
p{margin:0 0 1em;overflow-wrap:anywhere}
.eyebrow{margin:0 0 .4em;font-size:12px;letter-spacing:.22em;color:var(--sky);font-weight:700}
.lead2{font-size:clamp(16px,2vw,19px);color:var(--navy);margin-top:1em}
.note,.s{color:var(--mute);font-size:14px}
:focus-visible{outline:3px solid var(--sky);outline-offset:2px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
.header-inner{max-width:1120px;margin:0 auto;padding:6px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.header-logo{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 14px 4px;margin:2px 0;border-radius:10px;transition:transform .3s ease,box-shadow .3s ease,background .3s ease;cursor:pointer;text-decoration:none}
.header-logo:hover,.header-logo:focus-visible{transform:translateY(-3px);background:#fff;box-shadow:0 8px 20px rgba(27,53,87,.16)}
.header-logo img{height:70px;width:auto}
.logo-hint{font-size:11px;line-height:1.3;letter-spacing:.08em;color:#a8863f;white-space:nowrap;border-top:1px solid var(--gold);padding-top:2px}
nav{display:flex;gap:4px}
nav a{padding:8px 12px;text-decoration:none;font-size:14px;color:var(--navy);border-radius:999px;white-space:nowrap;transition:background .2s}
nav a:hover{background:var(--sky-l)}
.menu{display:none;border:1px solid var(--navy);background:#fff;color:var(--navy);padding:8px 14px;border-radius:999px;font:inherit;font-size:14px;cursor:pointer}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(165deg,#fff 0%,#f4f9fc 45%,var(--gold-l) 100%);padding:clamp(40px,7vw,90px) 0 clamp(64px,8vw,100px)}
.blob{position:absolute;border-radius:50%;filter:blur(40px);opacity:.55;pointer-events:none;will-change:transform;transition:transform .5s ease-out}
.b1{width:340px;height:340px;background:#bfe0f3;left:-80px;top:-60px}
.b2{width:300px;height:300px;background:#f6e3bd;right:-60px;top:30%}
.b3{width:240px;height:240px;background:#cfeadf;left:38%;bottom:-100px}
.hero-grid{position:relative;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center}
.hero-sub{font-size:clamp(16px,2vw,20px);color:var(--navy);margin:1.1em 0 .2em;font-weight:700}
.hero-tech{color:var(--mute);font-size:14px;letter-spacing:.04em}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{display:inline-block;background:var(--navy);color:#fff;text-decoration:none;padding:13px 28px;border-radius:999px;font-weight:700;border:2px solid var(--navy);transition:transform .25s,box-shadow .25s,background .25s}
.btn:hover{background:var(--navy-d);transform:translateY(-2px);box-shadow:0 8px 18px rgba(27,53,87,.25)}
.btn.ghost{background:#fff;color:var(--navy);border-color:var(--gold)}.btn.ghost:hover{background:var(--gold-l)}
.hero-visual{display:flex;flex-direction:column;gap:18px;align-items:center}
.hero-logo-card{background:rgba(255,255,255,.85);border:1px solid var(--line);border-radius:24px;padding:clamp(18px,3vw,34px);box-shadow:0 18px 50px rgba(27,53,87,.12);width:min(100%,460px);transition:transform .25s ease-out;transform-style:preserve-3d}
.mini-chain{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 0;justify-content:center}
.mini-chain li{display:flex;align-items:center;font-weight:700;color:var(--navy);font-size:14px}
.mini-chain li a,.mini-chain li span{display:inline-block;background:#fff;border:1px solid var(--line);border-bottom:3px solid var(--gold);padding:6px 16px;border-radius:999px;text-decoration:none;color:var(--navy);min-height:36px}
.mini-chain li a{border-color:var(--sky);border-bottom-color:var(--sky);transition:transform .25s cubic-bezier(.3,1.5,.5,1),background .2s,box-shadow .2s;box-shadow:0 3px 8px rgba(79,163,209,.2)}
.mini-chain li a:hover,.mini-chain li a:focus-visible{background:var(--sky-l);transform:translateY(-3px) scale(1.06);box-shadow:0 8px 16px rgba(79,163,209,.3)}
.mini-chain li.plain span{background:transparent;border-style:dashed;color:var(--mute);font-weight:400}
.chain-hint{margin:-6px 0 0;font-size:13px;color:#a8863f;font-weight:700}
.chain-hint::before{content:"☝ "}
.mini-chain li:not(:last-child)::after{content:"→";color:var(--sky);margin:0 8px}
.scroll-cue{position:absolute;left:50%;bottom:18px;width:26px;height:42px;margin-left:-13px;border:2px solid var(--navy);border-radius:14px;opacity:.5}
.scroll-cue span{position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:var(--navy);animation:cue 1.8s ease-in-out infinite}
@keyframes cue{0%{opacity:0;transform:translateY(0)}40%{opacity:1}100%{opacity:0;transform:translateY(14px)}}

/* ---------- sections ---------- */
.sec{padding:clamp(52px,7vw,92px) 0}.sec.alt{background:var(--alt)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:20px 0}
.box{background:#fff;border:1px solid var(--line);border-top:3px solid var(--gold);border-radius:10px;padding:16px 20px;min-width:0}
.chips{list-style:none;margin:1em 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}.chips.center{justify-content:center;margin:30px 0}
.chips li{background:#fff;border:1px solid var(--gold);color:var(--navy);padding:4px 14px;border-radius:999px;font-size:14px}
.closing{text-align:center;color:var(--navy);font-weight:700;margin-top:32px}

/* about: 3 horizontal pillars */
.pillars{list-style:none;margin:30px 0 18px;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pillar{position:relative;background:#fff;border-radius:18px;padding:26px 24px 24px;border:1px solid var(--line);overflow:hidden;transition:transform .3s,box-shadow .3s}
.pillar:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(27,53,87,.12)}
.pillar svg{width:46px;height:46px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.pillar .pn{position:absolute;right:16px;top:6px;font-size:54px;font-weight:800;opacity:.12;line-height:1}
.pillar h3{margin:.6em 0 .2em;font-size:22px}.pillar p{margin:0;color:var(--mute)}
.p1{color:var(--sky);border-top:4px solid var(--sky)}.p2{color:var(--sage);border-top:4px solid var(--sage)}.p3{color:#d9a24a;border-top:4px solid var(--gold)}
.pillar h3,.pillar p{color:var(--navy)}.pillar p{color:var(--mute)}

/* expandable */
details.more{background:#fff;border:1px solid var(--line);border-radius:12px;margin-top:10px}
details>summary{cursor:pointer;list-style:none;font-weight:700;color:var(--navy);padding:12px 18px;position:relative;border-radius:12px;min-height:44px;display:flex;align-items:center}
details>summary::-webkit-details-marker{display:none}
details>summary::after{content:"＋";margin-left:auto;color:var(--sky);font-size:20px;transition:transform .25s}
details[open]>summary::after{content:"－"}
details>summary:hover{background:var(--sky-l)}
.more-body{padding:4px 20px 18px;animation:rise .4s ease both}

/* services */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:28px}
.svc{position:relative;background:#fff;border-radius:20px;padding:24px;border:1px solid var(--line);transition:transform .3s,box-shadow .3s;min-width:0}
.svc:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(27,53,87,.12)}
.svc-ico{width:62px;height:62px;border-radius:18px;display:grid;place-items:center;margin-bottom:10px}
.svc-ico svg{width:34px;height:34px;fill:none;stroke:#fff;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.s1 .svc-ico{background:var(--sky)}.s2 .svc-ico{background:var(--gold)}.s3 .svc-ico{background:var(--sage)}.s4 .svc-ico{background:var(--peach)}
.s1{border-bottom:4px solid var(--sky)}.s2{border-bottom:4px solid var(--gold)}.s3{border-bottom:4px solid var(--sage)}.s4{border-bottom:4px solid var(--peach)}
.svc .num{position:absolute;right:20px;top:14px;font-size:38px;font-weight:800;opacity:.12;color:var(--navy)}
.svc h3{margin-bottom:.4em}
.when{background:var(--alt);border-radius:10px;padding:10px 14px;font-size:15px;margin-bottom:10px}
.when b{display:block;font-size:12px;letter-spacing:.1em;color:#a8863f}
.svc details{background:transparent;border:0;margin:0}
.svc summary{padding:8px 0;color:var(--navy)}
.svc ul{margin:.2em 0 .6em;padding-left:1.2em}
.tools{font-size:13px;color:var(--mute);border-top:1px dashed var(--line);padding-top:.7em;margin:0}
.learning{margin-top:26px;background:linear-gradient(90deg,var(--gold-l),var(--sky-l));padding:14px 20px;border-radius:12px;color:var(--navy)}
.learning b{margin-right:1em}

/* background: split */
.bg-sec{background:linear-gradient(180deg,#fff,#f4f9fc)}
.bg-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:26px 0}
.wall,.idea{position:relative;padding:28px;border-radius:20px;border:1px solid #c3d0de;box-shadow:0 10px 28px rgba(27,53,87,.08);overflow:hidden;transition:transform .3s,box-shadow .3s}
.wall:hover,.idea:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(27,53,87,.14)}
.wall::before,.idea::before{content:"";position:absolute;left:0;right:0;top:0;height:5px}
/* Left: deeper blue-grey. Right: lighter, airier blue. Same size, same weight, no solid navy block. */
.wall{background:linear-gradient(160deg,#d3deea 0%,#e3ebf3 100%)}
.wall::before{background:#5f7a99}
.idea{background:linear-gradient(160deg,#f2f8fc 0%,#e4f1f8 100%)}
.idea::before{background:var(--sky)}
.wall h3,.idea h3{color:var(--navy)}
.wall .chips li{background:#fff;border-color:var(--gold);color:var(--navy)}
.human-badge{background:var(--sage-l);border-left:4px solid var(--sage);padding:12px 16px;border-radius:6px;color:var(--navy);font-weight:700;margin:1em 0 0}

/* works */
.works{background:linear-gradient(180deg,#fff,#f3f9fc 55%,#fff)}
.tap-hint{display:inline-block;margin-top:.4em;font-size:14px;color:#a8863f;font-weight:700}
.tap-hint::before{content:"☝ "}
.flowline{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:10px;align-items:center;margin:30px 0 14px}
.arrow{font-size:34px;line-height:1;color:var(--gold);animation:nudge 1.8s ease-in-out infinite}
.arrow:nth-of-type(2){animation-delay:.4s}
@keyframes nudge{0%,100%{transform:translateX(0)}50%{transform:translateX(6px)}}
.tile{position:relative;display:flex;flex-direction:column;align-items:center;gap:2px;background:#fff;border:3px solid var(--line);border-radius:22px;padding:12px 12px 14px;font:inherit;color:var(--ink);cursor:pointer;min-width:0;transition:transform .3s cubic-bezier(.3,1.5,.5,1),box-shadow .3s,border-color .3s}
.tile:hover{transform:translateY(-6px) rotate(-1deg);box-shadow:0 16px 30px rgba(27,53,87,.16)}
.tile.k1:hover,.tile.k3:hover{transform:translateY(-6px) rotate(1deg)}
.k1{--c:var(--navy)}.k2{--c:var(--sky)}.k3{--c:var(--sage)}
.tile:hover,.tile[aria-selected=true]{border-color:var(--c)}
.tile[aria-selected=true]{box-shadow:0 14px 30px rgba(27,53,87,.2);background:#fbfdff}
.tile[aria-selected=true]::after{content:"";position:absolute;left:50%;bottom:-17px;width:20px;height:20px;margin-left:-10px;background:#fff;border-right:3px solid var(--c);border-bottom:3px solid var(--c);transform:rotate(45deg);z-index:2}
.tile-img{display:grid;place-items:center;width:100%;height:128px;border-radius:14px;background:#fff;border:1px solid var(--line);overflow:hidden;margin-bottom:6px}
.tile-img{position:relative}.tile-img img{position:absolute;inset:4px;width:calc(100% - 8px);height:calc(100% - 8px);object-fit:contain}
.tile-img img.contain{inset:8px;width:calc(100% - 16px);height:calc(100% - 16px)}
.tile-no{position:absolute;left:-8px;top:-12px;padding:3px 12px;border-radius:999px;background:var(--c);color:#fff;font-weight:800;font-size:12px;letter-spacing:.08em;line-height:1.5;white-space:nowrap;box-shadow:0 4px 10px rgba(0,0,0,.18)}
.tile b{font-size:20px;color:var(--navy)}.tile small{color:var(--mute);font-size:13px}
.compare-bar{text-align:center;margin:14px 0 26px}
.tile-compare{background:#fff;border:2px dashed var(--gold);color:var(--navy);border-radius:999px;padding:10px 24px;min-height:44px;font:inherit;font-weight:700;cursor:pointer;transition:background .25s,transform .25s}
.tile-compare:hover{background:var(--gold-l);transform:translateY(-2px)}
.tile-compare[aria-selected=true]{background:var(--gold-l);border-style:solid}
.tile-compare::before{content:"⇄ "}
.stage-view{min-height:0}#works-flow{scroll-margin-top:28px}
.panel{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(16px,3vw,30px);box-shadow:0 18px 44px rgba(27,53,87,.1);animation:pop .45s cubic-bezier(.3,1.4,.5,1) both}
.panel[hidden]{display:none}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
.panel figure{margin:0}.panel .fig-3d{width:100%;max-width:380px;margin:0 auto}.panel .fig-order{max-width:440px;margin:0 auto}
.panel .desc p{margin:.4em 0}
.panel .fig-3d .zoom{background:radial-gradient(circle at 50% 40%,#fff,#e9eef3)}
.panel h3{margin:.3em 0 .4em}
.panel-c{grid-template-columns:minmax(0,1.7fr) auto minmax(0,1fr)}
.panel-c .cmp-note{grid-column:1/-1;text-align:center;margin:0;color:var(--mute)}
.cmp-arrow{font-size:30px;color:var(--gold);font-weight:700}
.tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;padding:3px 12px;border-radius:999px;margin-bottom:6px;color:#fff}
.t-a{background:var(--navy)}.t-b{background:var(--sky)}.t-c{background:var(--sage)}
figure{margin:0}figcaption{font-size:13px;color:var(--mute);margin-top:8px;text-align:center}
.zoom{display:block;width:100%;padding:0;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:zoom-in;overflow:hidden;transition:box-shadow .25s,transform .25s}
.zoom:hover{box-shadow:0 10px 24px rgba(27,53,87,.18);transform:translateY(-2px)}
.zoom img{width:100%}
.spec{display:inline-block;background:var(--navy);color:#fff;padding:8px 18px;border-radius:8px;font-weight:700;letter-spacing:.03em}
.all10{margin-top:26px}
.all10 h4{margin:1.4em 0 .4em;padding-left:10px;border-left:4px solid var(--gold)}
.all10 .more-body>h4:first-child{margin-top:.6em}
.terms{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0 0}
.terms div{background:var(--alt);border-radius:10px;padding:8px 14px}
.terms dt{font-weight:700;color:var(--navy)}.terms dd{margin:0;font-size:14px;color:var(--mute)}
.calc{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:12px;align-items:stretch;margin:12px 0}
.calc ul{margin:.3em 0 0;padding-left:1.2em;font-size:15px}
.op{align-self:center;font-size:28px;color:var(--gold);font-weight:700}
.judge{background:var(--peach-l);border-left:4px solid var(--peach);border-radius:8px;padding:12px 18px;margin:12px 0}
.judge p{margin:0}
.legend{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:13px;margin:10px 0}
.legend span::before{content:"";display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px;vertical-align:-1px}
.l1::before{background:var(--navy)}.l2::before{background:#8fb6d3}.l3::before{background:var(--gold)}
.flow{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.flow li{background:#fff;border:1px solid var(--line);border-left:5px solid var(--navy);border-radius:10px;padding:10px 16px;display:grid;grid-template-columns:auto 1fr;column-gap:12px;min-width:0}
.flow li.t2{border-left-color:#8fb6d3}.flow li.t3{border-left-color:var(--gold);background:var(--gold-l)}
.flow i{grid-row:span 2;font-style:normal;font-weight:700;color:var(--gold);font-size:20px;align-self:center}
.flow b{color:var(--navy)}.flow span{font-size:14px;color:var(--mute)}


/* Real STL viewer (Codex version's flange-viewer.js, used unchanged). Only the frame/buttons are styled here. */
.flange-viewer{min-width:0;background:#f1f5f1;border:1px solid var(--line);border-radius:14px;padding:12px}
.flange-canvas{width:100%;height:320px;position:relative;overflow:hidden;border-radius:9px}
.flange-canvas canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}
.flange-canvas canvas:active{cursor:grabbing}
.flange-fallback{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;z-index:1;pointer-events:none}
/* The site-wide img{display:block} would otherwise defeat the [hidden] attribute that flange-viewer.js sets once 3D is running. */
.flange-fallback[hidden],.flange-image-link[hidden]{display:none}
.flange-tools{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin:10px 0 4px}
.flange-tools[hidden]{display:none}
.flange-tools button{background:#fff;color:var(--navy);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font:inherit;font-size:13px;min-height:40px;min-width:40px;cursor:pointer;transition:background .2s}
.flange-tools button:hover{background:var(--sky-l)}
.flange-status{font-size:12px;margin:8px 0 4px;line-height:1.7;color:var(--mute);text-align:center}
.flange-image-link{display:block;margin:0 auto;background:none;border:0;padding:4px 8px;font:inherit;font-size:12px;color:var(--navy);text-decoration:underline;text-underline-offset:4px;cursor:zoom-in;min-height:32px}
.panel-c .flange-canvas{height:300px}
.sum-sub{display:block;font-size:12px;font-weight:400;color:var(--mute);margin-top:2px}
details>summary:has(.sum-sub){flex-wrap:wrap}
.human-note{margin:1.6em 0 0;background:var(--sage-l);border-left:4px solid var(--sage);border-radius:8px;padding:12px 18px;color:var(--navy)}
.human-note b{display:block;margin-bottom:.2em}
@media(max-width:600px){.flange-canvas{height:260px}.panel-c .flange-canvas{height:240px}}
@media(max-width:350px){.flange-canvas{height:230px}.panel-c .flange-canvas{height:210px}.flange-tools{gap:4px}.flange-tools button{padding:6px 10px;font-size:12px}}

/* BACKGROUND: 6-step experience (blue-grey, matches the two cards above) */
.bg-explore{margin:36px 0 8px}
.bg-explore-head h3{margin:.1em 0 .2em}
.bg-explore-head .hint-line{margin:0 0 4px}
.bg-steps{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:14px;margin:16px 0 18px}
.bg-step{position:relative;text-align:left;background:#fff;border:1px solid #c3d0de;border-radius:16px;padding:16px 12px 14px;min-height:112px;font:inherit;color:var(--navy);cursor:pointer;box-shadow:0 6px 18px rgba(27,53,87,.06);transition:transform .25s,box-shadow .25s,border-color .25s,background .25s}
.bg-step:hover{transform:translateY(-4px);box-shadow:0 12px 24px rgba(27,53,87,.14);border-color:#8aa0b9}
.bg-step b{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#e3ebf3;color:#4a6585;font:700 12px/1 Arial,sans-serif;transition:background .25s,color .25s}
.bg-step span{display:block;margin-top:14px;font-weight:700;font-size:14px;line-height:1.5}
.bg-step::after{content:"→";position:absolute;right:-13px;top:42%;color:var(--gold);font-size:18px;font-weight:700;z-index:2}
.bg-step:last-child::after{content:none}
.bg-step[aria-selected=true]{border:2px solid #5f7a99;background:linear-gradient(160deg,#d3deea,#e9f0f7);box-shadow:0 12px 26px rgba(95,122,153,.28);transform:translateY(-3px)}
.bg-step[aria-selected=true] b{background:#5f7a99;color:#fff;animation:ping .55s ease}
.bg-step[aria-selected=true]::before{content:"";position:absolute;left:50%;bottom:-17px;width:16px;height:16px;margin-left:-8px;background:#e9f0f7;border-right:2px solid #5f7a99;border-bottom:2px solid #5f7a99;transform:rotate(45deg);z-index:3}
@keyframes ping{0%{transform:scale(.7)}60%{transform:scale(1.18)}100%{transform:scale(1)}}
.bg-panel{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px;align-items:center;background:linear-gradient(160deg,#f2f6fa,#e4edf5);border:1px solid #c3d0de;border-left:5px solid #5f7a99;border-radius:20px;padding:26px;min-height:330px;animation:pop .45s cubic-bezier(.3,1.4,.5,1) both}
.bg-panel[hidden]{display:none}
.bg-count{margin:0;font:700 12px/1.5 Arial,sans-serif;letter-spacing:.19em;color:#a8863f}
.bg-copy h4{font-size:clamp(20px,2.6vw,28px);margin:.4em 0 .5em}
.bg-copy p{margin:0 0 .8em}
.bg-visual{position:relative;min-height:250px;border-radius:14px;background:#fff;border:1px solid #c9d6e3;display:grid;place-items:center;overflow:hidden;padding:16px 16px 28px}
.bg-visual .zoom{position:relative;z-index:1;width:auto;max-width:100%;border:0;background:transparent}
.bg-visual .zoom img{width:auto;max-width:100%;max-height:220px;margin:0 auto;border-radius:6px}
.bg-visual #bgpanel-1 .zoom img{max-height:240px}
.bg-legend{position:absolute;right:14px;bottom:9px;font:700 10px/1 Arial,sans-serif;letter-spacing:.15em;color:#7f97b0}
.bg-link{position:relative;z-index:1;display:flex;align-items:center;justify-content:center;width:100%;padding-top:20px}
.bg-link .node{background:#fff;border:2px solid #5f7a99;color:var(--navy);padding:12px 14px;border-radius:14px;font-weight:700;text-align:center;font-size:14px;line-height:1.4;animation:slideIn .6s both}
.bg-link .node small{display:block;font-weight:400;font-size:11px;color:var(--mute)}
.bg-link .n2{border-color:var(--sky);animation-delay:.25s}
.bg-link .wire{flex:1 1 50px;min-width:50px;height:3px;border-radius:3px;background:linear-gradient(90deg,#5f7a99,var(--sky));position:relative;transform-origin:left;animation:draw .7s .15s both}
.bg-link .wire i{position:absolute;left:50%;top:-24px;transform:translateX(-50%);font-style:normal;font-size:11px;font-weight:700;color:#4a6585;white-space:nowrap}
@keyframes draw{from{transform:scaleX(0)}to{transform:none}}
@keyframes slideIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.bg-dims{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px;position:relative;z-index:1;width:100%}
.bg-dims li{background:var(--sky-l);border:1px solid #b9d9ea;border-radius:12px;padding:14px 10px;text-align:center;color:var(--navy);animation:pop .5s both}
.bg-dims li:nth-child(2){animation-delay:.1s}.bg-dims li:nth-child(3){animation-delay:.2s}.bg-dims li:nth-child(4){animation-delay:.3s}
.bg-dims small{display:block;font-size:11px;color:var(--mute)}
.bg-calc{position:relative;z-index:1;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px}
.bg-calc span{padding:12px 14px;border-radius:12px;font-weight:700;color:var(--navy);animation:pop .5s both}
.bg-calc .c1{background:#d3deea}.bg-calc .c2{background:var(--gold-l);animation-delay:.15s}.bg-calc .c3{background:var(--sage-l);border:2px solid var(--sage);animation-delay:.3s}
.bg-calc em{font-style:normal;font-size:22px;color:var(--gold);font-weight:700}
@media(max-width:900px){
  .bg-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px 12px}
  .bg-step:nth-child(3)::after{content:none}
  .bg-step{min-height:100px}
  .bg-panel{grid-template-columns:1fr;gap:18px;padding:20px;min-height:0}
  .bg-visual{min-height:220px}
}
@media(max-width:360px){
  .bg-steps{gap:12px 8px}.bg-step{padding:12px 8px}.bg-step span{font-size:12px}.bg-step::after{right:-10px;font-size:14px}
  .bg-panel{padding:16px}.bg-link .node{font-size:12px;padding:10px 8px}.bg-link .wire i{font-size:10px}
}
.bg-step span{text-wrap:balance}
@media(max-width:600px){
  .bg-step span{font-size:12.5px}
  .bg-link{flex-direction:column;padding-top:0}
  .bg-link .wire{flex:none;width:3px;height:56px;min-width:0;background:linear-gradient(180deg,#5f7a99,var(--sky));transform-origin:top;animation:drawY .7s .15s both}
  .bg-link .wire i{left:14px;top:50%;transform:translateY(-50%)}
  .bg-link .node{min-width:150px}
}
@keyframes drawY{from{transform:scaleY(0)}to{transform:none}}
/* BACKGROUND heading: even gaps around "から"; phrases wrap as units so nothing overflows on phones */
.h-part{display:inline-block;white-space:nowrap}
.h-part:not(:last-child){margin-right:.7em}

/* contact */
.flow3{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;counter-reset:f}
.flow3 li{background:#fff;border:1px solid var(--line);border-top:4px solid var(--sky);border-radius:14px;padding:18px;display:flex;flex-direction:column;gap:4px}
.flow3 li:nth-child(2){border-top-color:var(--gold)}.flow3 li:nth-child(3){border-top-color:var(--sage)}
.flow3 i{font-style:normal;color:var(--gold);font-weight:800;font-size:24px}.flow3 b{color:var(--navy)}.flow3 span{font-size:14px;color:var(--mute)}
.window{max-width:520px;margin:0 auto;text-align:center;background:#fff;border:2px dashed var(--gold);border-radius:16px;padding:18px}
.window p{margin:.2em 0}
footer{background:var(--navy);color:#fff;text-align:center;padding:28px 20px}footer p{margin:.2em 0}

/* reveal (only when JS is on) */
.js .rv{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease}
.js .rv.in{opacity:1;transform:none}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- dialogs ---------- */
dialog{border:0;padding:0;color:var(--ink)}
dialog::backdrop{background:rgba(18,38,63,.6);backdrop-filter:blur(3px)}
.pr-dialog{width:min(640px,calc(100vw - 24px));max-height:calc(100dvh - 24px);border-radius:20px;background:linear-gradient(180deg,#fff 0%,#f6f9fc 60%,#fbf6ea 100%);box-shadow:0 24px 70px rgba(18,38,63,.4);border-top:5px solid var(--gold);overflow:auto}
.pr-dialog[open]{animation:prIn .45s cubic-bezier(.2,.7,.2,1)}
.pr-dialog[open]::backdrop{animation:fade .4s ease}
@keyframes prIn{from{opacity:0;transform:translateY(18px) scale(.97)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}
.pr-close,.lb-close{position:sticky;display:block;margin:10px 10px 0 auto;top:10px;min-height:44px;padding:0 18px;border-radius:999px;border:1px solid var(--navy);background:#fff;color:var(--navy);font:inherit;font-size:15px;font-weight:700;cursor:pointer;z-index:2;transition:background .2s}
.pr-close:hover,.lb-close:hover{background:var(--navy);color:#fff}
.pr-content{padding:6px 28px 32px;text-align:center}
.pr-logo{width:min(480px,100%);height:auto;margin:0 auto 14px;border-radius:12px}
.pr-dialog[open] .pr-logo{animation:logoIn .7s .1s ease both}
@keyframes logoIn{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}
.pr-name{font-size:26px;margin:0;color:var(--navy);background:none}
.pr-title{margin:.2em 0 .1em;color:#a8863f;font-weight:700;letter-spacing:.08em}
.pr-person{margin:0;color:var(--navy);font-size:18px}
.pr-catch{margin:18px 0;padding:14px 12px;border-top:1px solid var(--gold);border-bottom:1px solid var(--gold);color:var(--navy);font-size:clamp(16px,4.4vw,19px);font-weight:700}
.pr-mail{margin:0;font-size:15px;word-break:break-all}
.lightbox{width:min(96vw,1200px);max-height:96dvh;background:#fff;border-radius:12px;overflow:auto}
.lightbox[open]{animation:fade .3s ease}
.lightbox img{width:100%;max-height:86dvh;object-fit:contain;padding:8px}
body.pr-open{overflow:hidden}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr}.hero-visual{order:-1}
  .pillars{grid-template-columns:1fr}
  .bg-grid,.two{grid-template-columns:1fr}
  .panel{grid-template-columns:1fr}
  .panel-c{grid-template-columns:1fr}.panel-c .cmp-arrow{text-align:center;transform:rotate(90deg);height:30px}
  .calc{grid-template-columns:1fr}.op{text-align:center;font-size:24px}
  .flow3{grid-template-columns:1fr}
}
@media(max-width:760px){
  .menu{display:block}
  nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:8px 12px;gap:0}
  nav.open{display:flex}nav a{padding:12px;font-size:16px;border-radius:8px}
  .header-logo{padding:4px 8px 3px}.header-logo img{height:62px}
  .svc-grid,.flow,.terms{grid-template-columns:1fr}
  .scroll-cue{display:none}
  .flowline{gap:4px;margin-top:24px}
  .arrow{font-size:20px}
  .tile{padding:8px 6px 10px;border-width:2px;border-radius:16px}
  .tile-img{height:84px;margin-bottom:4px}
  .tile b{font-size:14px;text-align:center}.tile small{display:none}
  .tile-no{left:-3px;top:-10px;padding:2px 7px;font-size:10px;letter-spacing:.04em}
  .tile[aria-selected=true]::after{bottom:-13px;width:14px;height:14px;margin-left:-7px}
  .panel,.panel-c{grid-template-columns:1fr;gap:16px;padding:16px;border-radius:18px}
  .cmp-arrow{text-align:center;transform:rotate(90deg);height:30px}
  .panel .fig-3d{max-width:300px}
  .tile-compare{font-size:14px;padding:10px 16px}
}
@media(max-width:360px){
  .wrap{padding:0 16px}.header-inner{padding:4px 12px}.header-logo img{height:54px}.logo-hint{font-size:10px;letter-spacing:.04em}.menu{padding:8px 10px}
  .btn{padding:12px 20px}.pr-content{padding:6px 18px 26px}.panel{padding:16px}
  .wall,.idea{padding:20px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.js .rv{opacity:1;transform:none}}

/* ===== CAD AUTOMATION (追加: 変更用コピー) ===== */
.draft-ribbon{position:fixed;left:0;bottom:0;z-index:50;background:var(--peach);color:#fff;font-size:12px;font-weight:700;letter-spacing:.04em;padding:5px 14px;border-radius:0 10px 0 0;box-shadow:0 2px 10px rgba(0,0,0,.18);pointer-events:none}
.cad-jump{display:inline-block;margin-top:10px;font-weight:700;color:var(--navy);border-bottom:2px solid var(--gold);padding-bottom:1px}
.cad-block{margin-top:64px;padding-top:44px;border-top:1px solid var(--line);scroll-margin-top:24px}
.cad-head h3{font-size:clamp(21px,3vw,28px);color:var(--navy);margin:.2em 0 .1em;line-height:1.5}
.cad-badge{display:inline-block;vertical-align:middle;margin-left:12px;font-size:12px;font-weight:700;letter-spacing:.06em;color:#fff;background:var(--peach);border-radius:999px;padding:3px 12px}
.cad-sub{font-size:clamp(18px,2.4vw,22px);color:var(--navy);margin:52px 0 16px;padding-left:12px;border-left:5px solid var(--gold)}
.cad-flow{list-style:none;margin:30px 0 8px;padding:0;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px;counter-reset:cad}
.cad-flow li{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px 14px 40px;box-shadow:0 8px 22px rgba(27,53,87,.07);display:flex;flex-direction:column;gap:6px}
.cad-flow li:not(:last-child)::after{content:"➜";position:absolute;right:-13px;top:44%;color:var(--gold);font-size:16px;z-index:2;background:#fff;border-radius:50%;line-height:1}
.cad-flow i{font-style:normal;font-size:12px;font-weight:700;color:var(--gold);letter-spacing:.1em}
.cad-flow b{color:var(--navy);font-size:15px;line-height:1.5}
.cad-flow span{font-size:13px;color:var(--mute);line-height:1.65}
.cad-flow .st{position:absolute;left:14px;bottom:12px;font-style:normal;font-size:11px;font-weight:700;border-radius:999px;padding:2px 10px}
.st.ok{background:var(--sage-l);color:#2f6e5c;border:1px solid var(--sage)}.st.half{background:var(--sky-l);color:#276a8e;border:1px solid var(--sky)}.st.tbd{background:var(--peach-l);color:#b4592f;border:1px solid var(--peach)}
.cad-branch{text-align:center;color:var(--navy);margin:20px 0 6px;font-size:clamp(15px,2vw,17px)}
.cad-compare{display:grid;grid-template-columns:minmax(0,1.7fr) auto minmax(0,1fr);gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(14px,2.6vw,26px);box-shadow:0 18px 44px rgba(27,53,87,.1)}
.cad-compare figure{margin:0;min-width:0}
.cad-compare .zoom{display:block;width:100%;background:#fff;border:1px solid var(--line);border-radius:12px;padding:0;overflow:hidden}
.cad-compare .zoom img{display:block;width:100%;height:auto}
.cad-compare figcaption{font-size:12.5px;color:var(--mute);margin-top:8px;line-height:1.6}
.cad-compare .cad-3d{max-width:none}
.cad-compare .flange-canvas{height:340px}
.cad-facts{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:8px}
.cad-facts li{background:var(--alt);border-radius:12px;padding:10px 16px;font-size:14px;color:var(--ink);line-height:1.7}
.cad-facts li b{display:inline-block;min-width:8.5em;color:var(--navy);margin-right:8px}
.cad-facts li.note{background:var(--peach-l)}
.cad-pair{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(14px,2.6vw,26px);box-shadow:0 14px 36px rgba(27,53,87,.08)}
.cad-pair.rev{grid-template-columns:minmax(0,1fr) minmax(0,.9fr)}
.cad-pair figure{margin:0;min-width:0}
.cad-pair .zoom{display:block;width:100%;border:1px solid var(--line);border-radius:12px;padding:0;overflow:hidden;background:#fff}
.cad-pair .zoom img{display:block;width:100%;height:auto}
.cad-pair .fig-order{max-width:340px;margin:0 auto}
.cad-pair figcaption{font-size:12.5px;color:var(--mute);margin-top:8px}
.cad-text h5{font-size:17px;color:var(--navy);margin:0 0 .5em;line-height:1.55}
.cad-text ul{margin:.4em 0 .8em;padding-left:1.2em;font-size:14.5px;line-height:1.8}
.cad-text .spec{font-weight:700;color:var(--navy);background:var(--gold-l);border-radius:10px;padding:8px 14px;display:inline-block}
.cad-honest{font-size:13.5px;color:var(--ink);background:var(--alt);border-left:4px solid var(--gold);border-radius:6px;padding:8px 12px;margin:.6em 0;line-height:1.75}
.cad-status{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:40px}
.cad-status>div{border-radius:20px;padding:18px 22px;border:1px solid var(--line)}
.cad-status .ok{background:var(--sage-l);border-color:var(--sage)}.cad-status .tbd{background:var(--peach-l);border-color:var(--peach)}
.cad-status h5{margin:0 0 .5em;font-size:16px;color:var(--navy)}
.cad-status ul{margin:0;padding-left:1.2em;font-size:14px;line-height:1.85}
.cad-dl{margin-top:30px;text-align:center}
.cad-dl-title{font-size:13.5px;color:var(--mute);margin:0 0 10px}
.cad-dl .btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.cad-notice{margin-top:40px;background:var(--navy);color:#fff;border-radius:22px;padding:clamp(20px,3.4vw,32px);border:2px solid var(--gold);text-align:center}
.cad-notice-lead{font-size:clamp(18px,2.8vw,24px);font-weight:700;color:var(--gold-l);margin:0 0 .6em;line-height:1.6}
.cad-notice p{margin:.4em auto;max-width:44em;line-height:1.85;font-size:14.5px}
@media(max-width:1000px){.cad-flow{grid-template-columns:repeat(3,minmax(0,1fr))}.cad-flow li:nth-child(3n)::after{display:none}.cad-flow li:not(:last-child)::after{right:-12px}}
@media(max-width:820px){.cad-compare{grid-template-columns:minmax(0,1fr)}.cad-compare .cmp-arrow{justify-self:center;transform:rotate(90deg)}.cad-pair,.cad-pair.rev{grid-template-columns:minmax(0,1fr)}.cad-pair.rev .fig-order{order:2}.cad-status{grid-template-columns:1fr}}
@media(max-width:560px){.cad-flow{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.cad-flow li:nth-child(3n)::after{display:block}.cad-flow li:nth-child(2n)::after{display:none}.cad-flow li{padding:12px 12px 38px}.cad-flow b{font-size:14px}.cad-flow span{font-size:12.5px}.cad-compare .flange-canvas{height:260px}.cad-badge{display:block;margin:8px 0 0;width:max-content}.cad-facts li b{display:block;min-width:0}}
@media(max-width:350px){.cad-flow{grid-template-columns:minmax(0,1fr)}.cad-flow li::after{display:none!important}.cad-compare .flange-canvas{height:230px}}
/* ===== STEP 02 redo: 縦3段(DXF/DWG/3D) + 図面ビューア + 3方向の矢印 ===== */
.arrow.fan{display:block;width:44px;height:128px;align-self:start;margin-top:15px;font-size:0;line-height:0}
.arrow.fan svg{display:block;width:100%;height:100%;overflow:visible}
.tile-img.tri{display:grid;grid-template-rows:repeat(3,minmax(0,1fr));gap:3px;padding:3px;place-items:stretch}
.tile-img.tri .tri-row{position:relative;display:flex;align-items:center;gap:6px;min-height:0;border-radius:8px;background:#fff;overflow:hidden}
.tile-img.tri img,.tile-img.tri img.contain{position:static;inset:auto;width:auto;height:100%;max-width:72%;object-fit:contain;flex:0 1 auto}
.tile-img.tri em{font-style:normal;font-size:11px;font-weight:800;letter-spacing:.06em;color:var(--navy);margin-left:auto;padding-right:8px}
.panel.panel-s2{display:block}.panel.panel-s2[hidden]{display:none}
.s2-intro h3{margin:.3em 0 .4em}.s2-intro p{margin:.4em 0}
.s2-flow{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;font-size:13px;color:var(--navy);margin-top:10px}
.s2-flow b{background:var(--alt);border:1px solid var(--line);border-radius:999px;padding:3px 12px}.s2-flow i{font-style:normal;color:var(--gold);font-weight:700}.s2-flow .sp{flex-basis:0;width:14px}
.s2-tier{--c:var(--navy);border:1px solid var(--line);border-left:6px solid var(--c);border-radius:18px;padding:16px clamp(12px,2.4vw,22px) 18px;margin-top:18px;background:#fff}
.s2-tier.t-dxf{--c:var(--navy)}.s2-tier.t-dwg{--c:var(--gold)}.s2-tier.t-3d{--c:var(--sky)}
.s2-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 12px;margin-bottom:10px}
.s2-no{background:var(--c);color:#fff;font-size:12px;font-weight:800;border-radius:999px;padding:2px 12px;letter-spacing:.06em}
.s2-head h4{margin:0;font-size:19px;color:var(--navy)}.s2-sub{font-size:12.5px;color:var(--mute)}
.s2-points{margin:12px 0 0;padding-left:1.2em;font-size:14px;line-height:1.85}.s2-points li.warn{color:#9b4a25}
.s2-points .s2-evidence.zoom{display:inline-block;width:auto;padding:2px 12px;border-radius:999px;margin-left:6px;font:inherit;font-size:12.5px;color:var(--navy);border:1px solid var(--sky);background:var(--sky-l);cursor:zoom-in;transform:none;box-shadow:none}
.s2-dl{margin:12px 0 0}
.s2-3d-grid{display:grid;grid-template-columns:minmax(0,380px) minmax(0,1fr);gap:24px;align-items:center}
.s2-3d-grid .fig-3d{margin:0}.s2-3d-grid .desc p{margin:.4em 0}
.s2-3d-note{background:var(--sage-l);border-radius:10px;padding:8px 12px;font-size:13.5px}
.cadv{display:block;min-width:0}
.cadv-fallback{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:12px;background:#fff}
.cadv-bar{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.cadv-btn{min-height:40px;padding:6px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--navy);font:inherit;font-size:13.5px;font-weight:700;cursor:pointer;transition:background .2s}
.cadv-btn:hover{background:var(--sky-l)}.cadv-btn.sq{min-width:44px;padding:6px 0;font-size:18px;line-height:1}.cadv-btn.touch{margin-left:auto;border-style:dashed}.cadv-btn.touch[aria-pressed=true]{background:var(--gold-l);border-style:solid}
@media(hover:hover) and (pointer:fine){.cadv-btn.touch{display:none}}
.cadv-stage{position:relative;aspect-ratio:503/266;max-height:78vh;width:100%;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;cursor:grab;touch-action:pan-y}
.cadv-stage.grab{cursor:grabbing}.cadv-stage.touch-on{touch-action:none}
.cadv-svg{position:absolute;inset:0;width:100%;height:100%;display:block;user-select:none;-webkit-user-select:none}
.cadv-svg text{font-family:"Yu Gothic","Meiryo","Hiragino Sans","Noto Sans JP",sans-serif;user-select:none;pointer-events:none}
.cadv-hits .hit{cursor:pointer}
.cadv-sel{stroke:#d9534f!important;stroke-width:3.2px!important}text.cadv-sel{fill:#d9534f!important;stroke:none!important}
.cadv-info{font-size:13px;color:var(--mute);margin:8px 0 2px;line-height:1.7;min-height:1.7em}
.cadv-info.on{color:var(--navy);font-weight:700;background:var(--gold-l);border-radius:8px;padding:4px 10px}
.cadv-facts{font-size:12.5px;color:var(--mute);margin:2px 0 0}
.cadv-layers{margin-top:6px;font-size:13px}.cadv-layers summary{cursor:pointer;color:var(--navy);min-height:32px;display:flex;align-items:center}
.cadv-layerlist{display:flex;flex-wrap:wrap;gap:4px 16px;padding:6px 0}.cadv-layer{display:flex;gap:4px;align-items:center}
@media(max-width:820px){.s2-3d-grid{grid-template-columns:minmax(0,1fr)}.s2-3d-grid .fig-3d{max-width:380px;margin:0 auto}}
@media(max-width:600px){.arrow.fan{width:26px;height:84px;margin-top:11px}.tile-img.tri em{font-size:9px;padding-right:4px}.tile-img.tri{gap:2px;padding:2px}.cadv-stage{aspect-ratio:4/3}.s2-tier{border-left-width:4px;padding:12px 12px 14px}}
@media(max-width:600px){.sm-hide{display:none}.tile-img.tri img,.tile-img.tri img.contain{max-width:58%}.tile-img.tri em{font-size:8px;padding-right:2px;letter-spacing:0}.tile-img.tri .tri-row{gap:2px}}

/* STEP 02 fine-tune: tighter drawing stage (content-fit, centered) */
.s2-tier .cadv-stage{aspect-ratio:100/46;margin-inline:auto}
@media(max-width:600px){.s2-tier .cadv-stage{aspect-ratio:100/60}}

/* STEP 02 tile fine-tune: bigger drawings, labels close, centered (sample-image layout) */
.flowline{--tri-h:210px}
.tile.k2 .tile-img.tri{height:var(--tri-h)}
.arrow.fan{height:var(--tri-h)}
.tile-img.tri .tri-row{justify-content:center;gap:clamp(8px,1.6vw,18px);padding:0 6px}
.tile-img.tri img,.tile-img.tri img.contain{max-width:68%;height:100%;width:auto}
.tile-img.tri em{margin-left:0;padding-right:0;font-size:clamp(13px,1.5vw,17px);min-width:2.4em;text-align:left}
@media(max-width:600px){.flowline{--tri-h:120px}.tile-img.tri .tri-row{gap:5px;padding:0 2px}.tile-img.tri img,.tile-img.tri img.contain{max-width:64%}.tile-img.tri em{font-size:10px;min-width:2em}}
@media(max-width:600px){.tile-img.tri img,.tile-img.tri img.contain{max-width:56%}.tile-img.tri em{font-size:9px;min-width:0}.tile-img.tri .tri-row{gap:4px;padding:0 3px}}
@media(min-width:601px){.tile-img.tri em{font-size:clamp(16px,1.7vw,21px);font-weight:800;letter-spacing:.03em;min-width:2.6em}.tile-img.tri img,.tile-img.tri img.contain{max-width:70%}}

/* PROCESS 03: live rotating 3D inside the explorer panel (same viewer as 制作実績) */
#bgpanel-3 .bg-visual{display:block;padding:10px 10px 30px}
#bgpanel-3 .flange-viewer{border:0;background:#f1f5f1;padding:8px}
#bgpanel-3 .flange-canvas{height:280px}
@media(max-width:600px){#bgpanel-3 .flange-canvas{height:240px}}

/* Open/close marker: filled circle so the plus is easy to see and clearly clickable */
details>summary::after{content:"+";flex:none;display:grid;place-items:center;width:30px;height:30px;margin-left:auto;border-radius:50%;background:var(--sky);color:#fff;font-size:22px;font-weight:700;line-height:1;box-shadow:0 2px 6px rgba(70,150,200,.35);transition:transform .25s,background .2s}
details[open]>summary::after{content:"\2212";background:var(--navy);box-shadow:none}
details>summary:hover::after{transform:scale(1.12)}
/* Gentle attention pulse on the closed "+" marker (stops when open / reduced-motion) */
@keyframes plusPulse{0%,100%{box-shadow:0 2px 6px rgba(70,150,200,.35),0 0 0 0 rgba(70,150,200,.45);transform:scale(1)}50%{box-shadow:0 2px 6px rgba(70,150,200,.35),0 0 0 9px rgba(70,150,200,0);transform:scale(1.14)}}
details:not([open])>summary::after{animation:plusPulse 2s ease-in-out infinite}
details>summary:hover::after{animation:none;transform:scale(1.2)}
@media(prefers-reduced-motion:reduce){details:not([open])>summary::after{animation:none}}
/* Hand-off caution (data given to the machinist) */
.cad-handoff{max-width:44em;margin:16px auto 6px;text-align:left;background:rgba(255,255,255,.1);border:1px solid var(--gold);border-left:6px solid var(--gold);border-radius:12px;padding:14px 18px}
.cad-handoff b{display:block;color:var(--gold-l);font-size:16px;margin-bottom:.3em}
.cad-handoff p{margin:.3em 0;text-align:left}
.cad-handoff ul{margin:.4em 0 .2em 1.3em;padding:0;line-height:1.85;font-size:14.5px}
.dl-note{font-size:13px;line-height:1.7;color:#8a4b00;background:var(--gold-l);border-radius:8px;padding:6px 10px;margin:8px 0 0}