/* ---------- 3. How it works: pinned stage, one phone, four scenes ----------
   --q (0..1) = progress inside the current step, --sp (0..1) = overall; set by e-how.js. */
.how{background:var(--soft);padding:var(--pad) 0 calc(var(--pad) * .55)}
.how .sec-head{margin-bottom:clamp(8px,2vw,24px)}
.how-track{position:relative;height:420vh}
.how-stage{--q:0;--sp:0;position:sticky;top:var(--hp-navh);height:calc(100svh - var(--hp-navh));display:grid;align-items:center;overflow:hidden}
.how-in{display:grid;grid-template-columns:minmax(0,.78fr) minmax(0,1.22fr);gap:clamp(28px,6vw,96px);align-items:center;height:100%}
.steps{display:grid;gap:4px;max-width:470px}
.step{position:relative;padding:20px 0 22px 60px;border-top:1px solid var(--line);opacity:.4;transition:opacity .45s}
.step.on{opacity:1}.step.done{opacity:.62}
.s-go{position:absolute;inset:0;z-index:1;border-radius:var(--r-xs)}
.s-num{position:absolute;left:0;top:22px;font-size:14px;font-weight:750;font-variant-numeric:tabular-nums;color:var(--muted)}
.step.on .s-num{color:var(--p-brand)}
.step h3{font-size:clamp(22px,2.2vw,30px);line-height:1.25;letter-spacing:-.045em;font-weight:770}
.step p{max-height:0;overflow:hidden;font-size:16px;line-height:1.62;color:var(--muted);opacity:0;transition:max-height .5s var(--ease),opacity .4s,margin .5s;max-width:30em}
.step.on p{max-height:7em;opacity:1;margin-top:8px}
.s-bar{position:absolute;left:60px;right:0;top:-1px;height:2px;background:var(--p-brand);transform-origin:left;transform:scaleX(0)}
.step.on .s-bar{transform:scaleX(var(--q))}.step.done .s-bar{transform:scaleX(1)}
.scene{position:relative;display:grid;place-items:center;height:100%}
/* progress dial behind the phone: fills through the four steps and closes the circle at 04 */
.ring{position:absolute;left:50%;top:50%;width:min(88svh,760px,100%);aspect-ratio:1;transform:translate(-50%,-50%);pointer-events:none}
.ring svg{width:100%;height:100%;overflow:visible;transform:rotate(-90deg)}
.ring circle{fill:none;vector-effect:none}.r-track{stroke:#1d1d1f14;stroke-width:.14}.r-ticks{stroke:#1d1d1f2e;stroke-width:.6;stroke-dasharray:.05 .772}
.r-fill{stroke:var(--p-brand);stroke-width:.32;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:calc(1 - var(--sp))}
.rm{position:absolute;width:34px;height:34px;margin:-17px 0 0 -17px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:780;font-variant-numeric:tabular-nums;background:#fff;color:var(--muted);box-shadow:0 0 0 1px var(--line);transition:background-color .4s,color .4s}
.rm.m0{left:50%;top:0}.rm.m1{left:100%;top:50%}.rm.m2{left:50%;top:100%}.rm.m3{left:0;top:50%}
.how-stage[data-step="0"] .m0,.how-stage[data-step="1"] :is(.m0,.m1),.how-stage[data-step="2"] :is(.m0,.m1,.m2),.how-stage[data-step="3"] .rm{background:var(--p-brand);color:#fff;box-shadow:none}
.device-zone{position:relative;padding:22px;border-radius:var(--r-room);border:1.5px dashed #582a4952}
.zone-tag{position:absolute;left:28px;top:-12px;padding:3px 10px;border-radius:var(--r-btn);background:var(--soft);font-size:12px;font-weight:750;color:var(--p-brand)}
.phone{position:relative;z-index:1;height:min(66svh,620px);aspect-ratio:9/19.2;border-radius:var(--r-room);background:#fff;overflow:hidden;box-shadow:0 0 0 9px var(--ink),0 0 0 10px #000,0 50px 90px -40px #1d1d1f99}
.ph-top{height:54px;display:flex;align-items:center;justify-content:space-between;padding:16px 18px 0}
.ph-top i{width:22px;height:22px;border-radius:50%;background:var(--soft)}
.logo-pill{font-size:11px;font-weight:780;letter-spacing:.01em;padding:5px 11px;border-radius:var(--r-btn);background:var(--p-brand);color:#fff}
.ph-scr{position:absolute;inset:54px 0 0}
.how .sim{left:auto;right:0;bottom:6%}
.sc{position:absolute;inset:0;padding:8px 16px 16px;opacity:0;visibility:hidden;transition:opacity .45s ease,visibility .45s}
.sc.on{opacity:1;visibility:visible}
.sc-h{font-size:15px;font-weight:780;letter-spacing:-.03em;margin:4px 0 12px}
/* scene 0 — guide draws, checks fill, scan sweeps, results rise */
.cam{position:relative;border-radius:var(--r-card);overflow:hidden;aspect-ratio:3/3.7;background:#e9e6ea}
.cam img{width:100%;height:100%;object-fit:cover}
.cam .gen-tag{left:8px;bottom:8px;font-size:10px;padding:3px 6px}
.guide{position:absolute;inset:4% 6%;width:88%;height:92%;overflow:visible}
.guide ellipse{fill:none;stroke:#fff;stroke-width:.55;vector-effect:none;stroke-dasharray:1;stroke-dashoffset:calc(1 - min(1,var(--q) / .22))}
.guide path{fill:none;stroke:#ffffffc0;stroke-width:2;opacity:min(1,calc(var(--q) * 6))}
.scan{position:absolute;inset:0;background:linear-gradient(to bottom,transparent 72%,#dcaacb55 96%,#fff 100%);
  transform:translateY(calc(-100% + clamp(0,(var(--q) - .36) / .24,1) * 100%));opacity:calc(clamp(0,(var(--q) - .34) * 14,1) * clamp(0,(.66 - var(--q)) * 14,1))}
.chk{display:flex;gap:6px;margin-top:10px}
.chk li{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;font-size:12px;font-weight:720;padding:7px 0;border-radius:var(--r-btn);background:var(--soft)}
.chk li::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--p-brand);opacity:clamp(.15,calc((var(--q) - .2 - var(--n) * .06) * 14),1);box-shadow:0 0 0 3px #582a491f}
.res{position:absolute;left:10px;right:10px;bottom:10px;background:#fff;border-radius:var(--r-card);padding:10px 14px 8px;box-shadow:0 -12px 34px -14px #1d1d1f55;
  transform:translateY(calc((1 - clamp(0,(var(--q) - .58) / .2,1)) * 118%))}
.res p{display:grid;grid-template-columns:76px 1fr 22px;align-items:center;gap:8px;height:21px;font-size:11.5px;font-weight:620}
.res i{height:4px;border-radius:var(--r-xs);background:var(--soft);position:relative;overflow:hidden}
.res i::after{content:'';position:absolute;inset:0;border-radius:var(--r-xs);background:var(--p-brand);transform-origin:left;transform:scaleX(var(--v))}
.res b{font-size:12px;font-weight:760;font-variant-numeric:tabular-nums;text-align:right}
/* scene 1 — used days fill and stay (the mission grid faded; this one keeps) */
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}
.cal i{aspect-ratio:1;border-radius:var(--r-sm);background:var(--soft);display:grid;place-items:center}
.cal i.u::after{content:'';width:46%;aspect-ratio:1;border-radius:50%;background:var(--p-brand);transform:scale(clamp(0,calc(var(--q) * 22 - var(--i)),1))}
.miles{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.miles span{font-size:11px;font-weight:720;padding:5px 10px;border-radius:var(--r-btn);background:#fff;box-shadow:inset 0 0 0 1px var(--line);opacity:clamp(.2,calc((var(--q) - var(--n) * .2) * 6),1)}
.note{margin-top:14px;border-radius:var(--r-card);background:var(--soft);padding:14px;display:grid;gap:7px;position:relative}
.note .pen{position:absolute;right:12px;top:12px;width:16px;height:16px;border-radius:50%;background:#582a4926}
.note s,.home s,.guide-card s,.mall s{display:block;height:7px;border-radius:var(--r-xs);background:#1d1d1f17}
.note s{width:78%;transform-origin:left;transform:scaleX(clamp(0,calc((var(--q) - .58) * 4),1))}
.note s.sh{width:52%;transform:scaleX(clamp(0,calc((var(--q) - .7) * 4),1))}
/* scene 2 — past records rise, the brand's usage guide slides in beside them */
.entry{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--r-btn);background:var(--soft);margin-bottom:8px;
  opacity:clamp(0,calc((var(--q) - var(--n) * .13) * 6),1);transform:translateY(calc((1 - clamp(0,(var(--q) - var(--n) * .13) * 6,1)) * 16px))}
.entry .d{width:40px;font-size:11px;font-weight:760;font-variant-numeric:tabular-nums;color:var(--muted)}
.entry .mb{flex:1;display:flex;align-items:flex-end;gap:4px;height:28px}
.entry .mb i{flex:1;height:calc(var(--v) * 100%);border-radius:var(--r-xs);background:var(--p-brand);opacity:.82}
.guide-card{position:absolute;left:16px;right:16px;bottom:16px;border-radius:var(--r-card);background:#fff;padding:14px 16px 16px;display:grid;gap:8px;
  box-shadow:inset 3px 0 0 var(--p-brand),0 22px 40px -18px #1d1d1f66;transform:translateX(calc((1 - clamp(0,(var(--q) - .5) / .28,1)) * 112%))}
.guide-card p{font-size:13px;font-weight:780;color:var(--p-brand)}
.guide-card s.sh,.home s.sh,.mall s.sh{width:58%}
/* scene 3 — home → product card → tap → (virtual) official mall */
.home{padding-top:6px}.home s{margin:9px 0}.home .hh{height:14px;width:56%}
.prod{margin:16px 0;border-radius:var(--r-card);background:var(--soft);padding:12px;display:grid;grid-template-columns:56px 1fr;gap:4px 12px;align-items:center}
.prod .sw{grid-row:span 2}.prod span{font-size:13px;font-weight:780}.prod s{width:70%}
.sw{display:block;width:56px;height:56px;border-radius:var(--r-btn);background:linear-gradient(145deg,var(--p-brand),#8e5a7d)}
.go{grid-column:1/-1;position:relative;margin-top:8px;text-align:center;font-size:12px;font-weight:760;padding:10px;border-radius:var(--r-btn);background:var(--ink);color:#fff}
.tap{position:absolute;left:50%;top:50%;width:40px;height:40px;margin:-20px 0 0 -20px;border-radius:50%;background:#ffffff40;box-shadow:0 0 0 2px #fff;
  opacity:calc(clamp(0,(var(--q) - .24) * 10,1) * clamp(0,(.5 - var(--q)) * 10,1));transform:scale(calc(1.3 - clamp(0,(var(--q) - .26) * 5,1) * .5))}
.mall{position:absolute;inset:0;background:#fff;padding:8px 16px 16px;box-shadow:-24px 0 40px -24px #1d1d1f66;transform:translateX(calc((1 - clamp(0,(var(--q) - .46) / .3,1)) * 104%))}
.mall-h{font-size:12px;font-weight:760;color:var(--muted);padding:6px 0 10px;border-bottom:1px solid var(--line)}
.sw.big{width:100%;height:44%;border-radius:var(--r-card);margin:14px 0}
.mall s{margin:9px 0}.cart{display:block;height:42px;border-radius:var(--r-btn);background:var(--ink);margin-top:16px}
.flow-note{margin-top:28px;font-size:13px;line-height:1.6;color:var(--muted);max-width:56em}
/* reduced motion: no pin, step buttons switch the scene */
.how.static .how-track{height:auto}
.how.static .how-stage{position:relative;top:0;height:auto;padding:24px 0}
.how.static .scene{height:auto}

/* ---------- 4. Products: three cards unfold from the Fonday hub ---------- */
.products{padding:var(--pad) 0;background:var(--bg);overflow:hidden}
.fan{--e:0;position:relative}
.hub{position:relative;width:128px;aspect-ratio:1;margin:0 auto clamp(48px,6vw,84px);display:grid;place-items:center;z-index:2}
.hub .dial{position:absolute;inset:0}
.hub .disc{fill:var(--soft)}.hub .ticks{stroke:#1d1d1f33;stroke-width:2.2;stroke-dasharray:.35 4.41}.hub .core{fill:#fff;stroke:#1d1d1f1a;stroke-width:.4}
.hub span{position:relative;font-size:21px;font-weight:850;letter-spacing:-.075em}
.js .hub .dial{animation:spin 90s linear infinite}
.wires{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:0}
.wires path{vector-effect:none;fill:none;stroke:#1d1d1f2e;stroke-width:1.3;stroke-dasharray:1;stroke-dashoffset:calc(1 - var(--e))}
.cards{position:relative;z-index:1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.card{display:grid;grid-template-rows:subgrid;grid-row:span 7;gap:0;background:#fff;border-radius:var(--r-card);padding:24px 24px 26px;box-shadow:0 0 0 1px var(--line),0 34px 60px -44px #1d1d1f66;transform-origin:50% 0;will-change:transform;scroll-margin-top:90px}
.c-name{display:flex;align-items:center;gap:12px;font-size:23px;line-height:1.2;letter-spacing:-.05em;font-weight:790}
.c-ico{width:40px;height:40px;border-radius:var(--r-btn);background:var(--c);color:#fff;display:grid;place-items:center;flex:none}
.c-ico svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.c-meta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0 14px;padding-top:14px;border-top:1px solid var(--line)}
.c-meta dt,.c-what dt{font-size:12px;font-weight:650;color:var(--muted)}
.c-meta dd{margin:3px 0 0;font-size:14px;font-weight:720}
.badge{display:inline-block;font-size:12px;font-weight:750;padding:3px 9px;border-radius:var(--r-btn)}
.badge.on{background:color-mix(in srgb,var(--c) 13%,#fff);color:var(--c)}.badge.soon{background:#fff3df;color:#8a5a00}
.c-vis{position:relative;height:210px;border-radius:var(--r-card);background:color-mix(in srgb,var(--c) 8%,#fff);overflow:hidden;display:grid;place-items:center;margin-bottom:18px}
.c-vis .mini{position:relative;width:118px;height:178px;border-radius:var(--r-card);background:#fff;box-shadow:0 0 0 5px var(--ink),0 24px 40px -22px #1d1d1f80;padding:14px 12px;display:grid;align-content:start;gap:8px;overflow:hidden}
.c-vis .logo-pill{justify-self:start;font-size:9px;padding:3px 8px}
.c-vis .r{display:block;height:20px;border-radius:var(--r-xs);background:color-mix(in srgb,var(--c) 14%,#fff)}.c-vis .r.s{width:66%}
.v-me .mini{padding:0}.v-me img{width:100%;height:100%;object-fit:cover}
.v-me .oval{position:absolute;left:24%;top:16%;width:52%;height:46%;border:1.5px solid #fff;border-radius:50%}
.v-me .six{position:absolute;left:8px;right:8px;bottom:8px;display:grid;grid-template-columns:repeat(6,1fr);gap:3px}.v-me .six i{height:5px;border-radius:var(--r-xs);background:#ffffffd9}
.tab{position:relative;width:190px;height:128px;border-radius:var(--r-btn);background:#fff;box-shadow:0 0 0 5px var(--ink),0 24px 40px -22px #1d1d1f80;display:grid;grid-template-columns:30px 1fr;grid-auto-rows:min-content;gap:8px 10px;padding:12px}
.tab .side{grid-row:span 5;border-radius:var(--r-xs);background:color-mix(in srgb,var(--c) 18%,#fff)}
.tab .h{height:10px;width:60%;border-radius:var(--r-xs);background:#1d1d1f26}.tab .l{height:6px;border-radius:var(--r-xs);background:#1d1d1f14}.tab .l.s{width:70%}
.tab .bars{display:grid;gap:5px}.tab .bars i{height:7px;width:calc(var(--w) * 100%);border-radius:var(--r-xs);background:color-mix(in srgb,var(--c) 55%,#fff)}
.c-line{font-size:19px;line-height:1.42;letter-spacing:-.04em;font-weight:760;margin-bottom:12px}
.c-what dd{display:grid;gap:6px;margin:6px 0 0;font-size:15px;line-height:1.62;color:var(--muted)}
.c-what b{color:var(--ink);font-weight:720}.c-what small{font-size:13px}
.c-scope{margin-top:14px;padding-top:12px;border-top:1px dashed #1d1d1f26;font-size:12.5px;line-height:1.6;color:var(--muted)}
.c-btn{grid-row:7;align-self:end;margin-top:20px;min-height:50px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-btn);background:var(--c);color:#fff;font-size:15px;font-weight:720}
.c-btn.ghost{background:transparent;color:var(--c);box-shadow:inset 0 0 0 1.5px var(--c)}