/* ═══ OneSolve — dark, Apple-pro-page flavored ═══ */
:root{
  --bg:#07070b; --bg2:#0c0c12; --panel:#121218; --line:rgba(255,255,255,.09);
  --txt:#f5f5f7; --txt2:#a1a1aa; --txt3:#6e6e78;
  --blue:#5ac8fa; --violet:#7a5cff; --pink:#ff5ea0; --mint:#34e0a1; --amber:#ffb340;
  --grad:linear-gradient(100deg,#5ac8fa 0%,#7a5cff 45%,#ff5ea0 90%);
  --radius:22px;
  --ease:cubic-bezier(.22,.61,.21,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg); color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px; line-height:1.65; overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
html[lang=ja] body{font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic UI","Noto Sans JP",Meiryo,system-ui,sans-serif}
html[lang=ko] body{font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo",Pretendard,"Noto Sans KR","Malgun Gothic",system-ui,sans-serif}
html[lang=zh-TW] body,html[lang=zh-HK] body{font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC","Microsoft JhengHei",system-ui,sans-serif}
::selection{background:rgba(122,92,255,.45)}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:840px}
.center{text-align:center}
.section{padding:110px 0 40px}
.wide-only{display:none}
@media(min-width:760px){.wide-only{display:inline}}

/* ─── type ─── */
.eyebrow{
  font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--txt3);margin-bottom:14px;
}
h1{font-size:clamp(44px,7.2vw,84px);line-height:1.06;font-weight:700;letter-spacing:-.02em}
html:not([lang^=zh]) h1{font-size:clamp(38px,6.2vw,72px)}
h2{font-size:clamp(32px,4.6vw,52px);line-height:1.12;font-weight:700;letter-spacing:-.018em;margin-bottom:14px}
h3{font-size:20px;font-weight:650;margin-bottom:8px}
.sub{color:var(--txt2);font-size:clamp(17px,2vw,20px)}
.grad{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ─── nav ─── */
.nav{
  position:fixed;inset:0 0 auto;z-index:50;
  transition:background .4s var(--ease),border-color .4s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(9,9,14,.72);
  -webkit-backdrop-filter:saturate(1.6) blur(18px);backdrop-filter:saturate(1.6) blur(18px);
  border-color:var(--line);
}
.nav-inner{
  max-width:1080px;margin:0 auto;padding:0 24px;height:56px;
  display:flex;align-items:center;gap:28px;
}
.brand{display:flex;align-items:center;gap:9px;font-weight:650;font-size:16.5px}
.brand-mark{display:grid;place-items:center}
.brand-name em{font-style:normal;color:var(--txt3);font-weight:500;font-size:.86em;margin-left:2px}
.nav-links{display:none;gap:26px;font-size:14px;color:var(--txt2);margin-left:auto}
.nav-links a{transition:color .25s}
.nav-links a:hover{color:var(--txt)}
@media(min-width:760px){.nav-links{display:flex}}
.nav-cta{
  display:flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;padding:7px 14px;border-radius:99px;
  background:var(--txt);color:#0a0a0f;transition:transform .25s var(--ease),box-shadow .25s;
}
.nav-cta:hover{transform:scale(1.04);box-shadow:0 4px 24px rgba(255,255,255,.25)}
.nav-cta,.lang-switch,.brand-name{white-space:nowrap}
@media(max-width:600px){
  .brand-name em{display:none}
  .nav-inner{gap:12px}
}
.lang-switch-wrap{position:relative;margin-left:auto}
.lang-switch{
  display:flex;align-items:center;gap:5px;cursor:pointer;
  font-size:12.5px;font-weight:600;color:var(--txt2);
  background:transparent;font-family:inherit;
  border:1px solid var(--line);border-radius:99px;padding:5.5px 12px;
  transition:color .25s,border-color .25s;
}
.lang-switch:hover{color:var(--txt);border-color:rgba(255,255,255,.3)}
.lang-menu{
  position:absolute;top:calc(100% + 10px);right:0;min-width:150px;
  display:flex;flex-direction:column;padding:6px;
  background:rgba(16,16,24,.92);border:1px solid var(--line);border-radius:14px;
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  box-shadow:0 18px 50px rgba(0,0,0,.5);
  opacity:0;transform:translateY(-6px);pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease);
}
.lang-switch-wrap.open .lang-menu{opacity:1;transform:none;pointer-events:auto}
.lang-menu a{
  font-size:13.5px;font-weight:550;color:var(--txt2);
  padding:8px 12px;border-radius:9px;transition:background .2s,color .2s;
}
.lang-menu a:hover{background:rgba(255,255,255,.07);color:var(--txt)}
.lang-menu a.active{color:var(--txt);background:rgba(255,255,255,.05)}

/* ─── App Store chooser ─── */
.store-wrap{position:relative;z-index:12}
.store-wrap button{cursor:pointer;border:0;font-family:inherit}
.store-caret{opacity:.5;margin-left:3px;transition:transform .25s var(--ease)}
.store-wrap.open .store-caret{transform:rotate(180deg)}
.store-menu{
  position:absolute;top:calc(100% + 10px);left:50%;min-width:250px;
  display:flex;flex-direction:column;gap:2px;padding:8px;
  background:rgba(16,16,24,.94);border:1px solid var(--line);border-radius:16px;
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  box-shadow:0 18px 50px rgba(0,0,0,.55);
  opacity:0;transform:translate(-50%,-6px);pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease);
}
.store-wrap.open .store-menu{opacity:1;transform:translate(-50%,0);pointer-events:auto}
.store-menu a{
  display:flex;align-items:center;gap:12px;padding:9px 12px;border-radius:11px;
  font-size:14.5px;font-weight:600;color:var(--txt);transition:background .2s;
}
.store-menu a:hover{background:rgba(255,255,255,.07)}
.store-menu img{width:34px;height:34px;border-radius:8.5px;box-shadow:0 0 0 1px rgba(255,255,255,.12)}
.nav-store .store-menu{left:auto;right:0;transform:translateY(-6px)}
.nav-store.open .store-menu{transform:translateY(0)}
.drop-up .store-menu{top:auto;bottom:calc(100% + 10px);transform:translate(-50%,6px)}
.drop-up.open .store-menu{transform:translate(-50%,0)}

/* ─── products overview (duo) ─── */
.duo{display:grid;gap:18px;margin-top:44px}
@media(min-width:820px){.duo{grid-template-columns:1fr 1fr}}
.duo-card{
  position:relative;overflow:hidden;border-radius:30px;padding:34px 30px 30px;
  border:1px solid rgba(255,255,255,.12);
  transition:transform .45s var(--ease),border-color .45s;
}
.duo-card:hover{transform:translateY(-5px);border-color:rgba(255,255,255,.22)}
.duo-go{background:radial-gradient(130% 120% at 12% 0%,rgba(12,128,96,.28),transparent 60%),var(--bg2)}
.duo-mk{background:radial-gradient(130% 120% at 12% 0%,rgba(91,62,140,.34),transparent 60%),var(--bg2)}
.duo-icon{width:72px;height:72px;border-radius:17px;margin-bottom:18px;box-shadow:0 10px 30px rgba(0,0,0,.45),0 0 0 1px rgba(255,255,255,.1)}
.duo-card h3{font-size:26px;font-weight:700;letter-spacing:-.015em;margin-bottom:8px}
.duo-card p{color:var(--txt2);font-size:15.5px;max-width:420px}
.duo-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:24px}
.btn-store-sm{padding:8px 16px 8px 13px;border-radius:12px;gap:8px}
.btn-store-sm .btn-store-text{font-size:14.5px}
.btn-store-sm .btn-store-text small{font-size:9px}

/* ─── QR modal ─── */
.qr-modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:24px}
.qr-modal[hidden]{display:none}
.qr-backdrop{position:absolute;inset:0;background:rgba(4,4,8,.66);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.qr-box{
  position:relative;width:min(340px,92vw);border-radius:26px;padding:30px 26px 24px;
  background:rgba(18,18,26,.97);border:1px solid rgba(255,255,255,.14);
  box-shadow:0 40px 100px rgba(0,0,0,.7);text-align:center;
  animation:qrIn .35s var(--ease);
}
@keyframes qrIn{from{opacity:0;transform:translateY(14px) scale(.97)}to{opacity:1;transform:none}}
.qr-close{
  position:absolute;top:14px;right:14px;width:30px;height:30px;border-radius:50%;cursor:pointer;
  display:grid;place-items:center;color:var(--txt2);background:rgba(255,255,255,.07);border:0;
  transition:background .2s,color .2s;
}
.qr-close:hover{background:rgba(255,255,255,.14);color:var(--txt)}
.qr-card{display:none}
.qr-card.show{display:block}
.qr-app-icon{width:64px;height:64px;border-radius:15px;margin:0 auto 12px;box-shadow:0 10px 28px rgba(0,0,0,.5),0 0 0 1px rgba(255,255,255,.1)}
.qr-card b{font-size:17.5px;font-weight:650}
.qr-img-wrap{
  width:200px;height:200px;margin:18px auto 0;border-radius:18px;background:#fff;
  display:grid;place-items:center;
}
.qr-img-wrap img{width:176px;height:176px;image-rendering:pixelated}
.qr-hint{margin-top:14px;font-size:13.5px;color:var(--txt2)}
.qr-ios-note{display:none;margin-top:14px;font-size:14px;color:var(--txt2)}
.qr-web{
  display:inline-flex;align-items:center;gap:6px;margin-top:12px;
  font-size:13px;font-weight:600;color:var(--blue);
}
.qr-web:hover{text-decoration:underline}
.qr-modal.no-qr .qr-img-wrap,.qr-modal.no-qr .qr-hint{display:none}
.qr-modal.no-qr .qr-ios-note{display:block}

/* ─── hero ─── */
.hero{position:relative;padding:170px 0 60px}
.hero-glow{
  position:absolute;top:-320px;left:50%;transform:translateX(-50%);
  width:1200px;height:780px;pointer-events:none;
  background:
    radial-gradient(38% 42% at 32% 55%,rgba(90,200,250,.20),transparent 70%),
    radial-gradient(40% 46% at 62% 40%,rgba(122,92,255,.22),transparent 70%),
    radial-gradient(30% 36% at 78% 66%,rgba(255,94,160,.14),transparent 70%);
  filter:blur(10px);
}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(60% 55% at 50% 40%,#000 30%,transparent 100%);
  mask-image:radial-gradient(60% 55% at 50% 40%,#000 30%,transparent 100%);
}
.hero-inner{
  position:relative;max-width:1080px;margin:0 auto;padding:0 24px;
  display:grid;gap:56px;align-items:center;
}
@media(min-width:920px){.hero-inner{grid-template-columns:1.15fr .85fr}}
.lede{color:var(--txt2);font-size:clamp(17px,2.1vw,21px);margin:22px 0 34px}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.center-row{justify-content:center;margin-top:30px}
.hero-note{margin-top:26px;font-size:13.5px;color:var(--txt3)}

.btn-store{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--txt);color:#0a0a0f;border-radius:14px;padding:10px 20px 10px 16px;
  transition:transform .3s var(--ease),box-shadow .3s;
}
.btn-store:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 10px 40px rgba(255,255,255,.22)}
.btn-store-text{display:flex;flex-direction:column;line-height:1.15;font-weight:650;font-size:17px}
.btn-store-text small{font-size:10.5px;font-weight:500;opacity:.72;letter-spacing:.01em}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:550;color:var(--blue);
  padding:11px 16px;border-radius:14px;border:1px solid rgba(90,200,250,.28);
  transition:background .3s,border-color .3s,transform .3s var(--ease);
}
.btn-ghost:hover{background:rgba(90,200,250,.1);border-color:rgba(90,200,250,.5);transform:translateY(-2px)}
.btn-ghost svg{transition:transform .3s}
.btn-ghost:hover svg{transform:translateY(2px)}

/* hero board */
.hero-board{display:flex;justify-content:center}
.board-frame{
  position:relative;width:min(380px,86vw);aspect-ratio:1;padding:18px;
  border-radius:28px;
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);
  box-shadow:0 30px 80px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.board-frame svg{width:100%;height:100%;display:block}
.board-chip{
  position:absolute;top:-14px;right:18px;display:flex;align-items:center;gap:7px;
  font-size:12.5px;font-weight:600;color:var(--txt);
  background:rgba(18,18,26,.9);border:1px solid var(--line);border-radius:99px;padding:6px 13px;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  transition:opacity .4s;
}
.chip-dot{width:7px;height:7px;border-radius:50%;background:var(--grad);animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}

/* ─── product ─── */
.product-head{display:flex;gap:24px;align-items:flex-start;margin-bottom:54px;flex-wrap:wrap}
.app-icon{
  width:96px;height:96px;border-radius:22px;
  box-shadow:0 14px 44px rgba(0,0,0,.5),0 0 0 1px rgba(255,255,255,.1);
}
.product-head .sub{margin-top:6px;max-width:560px}
.head-store{margin-top:20px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{
  font-size:12.5px;font-weight:600;color:var(--txt2);
  border:1px solid var(--line);border-radius:99px;padding:4px 12px;
  background:rgba(255,255,255,.03);
}

.feature-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:640px){.feature-grid{grid-template-columns:1fr 1fr}}
@media(min-width:960px){.feature-grid{grid-template-columns:1fr 1fr 1fr}}
.card{
  background:linear-gradient(170deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px 28px;
  transition:transform .45s var(--ease),border-color .45s,background .45s;
}
.card:hover{transform:translateY(-5px);border-color:rgba(255,255,255,.2);background:linear-gradient(170deg,rgba(255,255,255,.08),rgba(255,255,255,.03))}
.card p{color:var(--txt2);font-size:15px}
.card-ico{width:40px;height:40px;margin-bottom:16px}
.card-ico svg{width:100%;height:100%}

/* ─── coach ─── */
.coach-card{
  position:relative;border-radius:32px;padding:clamp(30px,5vw,60px);
  display:grid;gap:44px;align-items:center;overflow:hidden;
  background:
    radial-gradient(120% 130% at 8% 0%,rgba(122,92,255,.16),transparent 55%),
    radial-gradient(110% 130% at 95% 100%,rgba(255,94,160,.12),transparent 55%),
    var(--bg2);
  border:1px solid rgba(255,255,255,.12);
}
@media(min-width:900px){.coach-card{grid-template-columns:1.1fr .9fr}}
.coach-copy p{color:var(--txt2);margin-bottom:14px}
.coach-copy strong{color:var(--txt);font-weight:600}
.chip-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.chip{
  font-size:13px;font-weight:600;padding:7px 14px;border-radius:99px;
  border:1px solid rgba(122,92,255,.4);color:#cfc4ff;background:rgba(122,92,255,.1);
}
.coach-visual{display:flex;flex-direction:column;gap:18px;align-items:center}
.voice-bubble{
  display:flex;align-items:center;gap:14px;max-width:340px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:20px;padding:16px 20px;
  box-shadow:0 18px 50px rgba(0,0,0,.4);
}
.voice-bubble p{font-size:15px;font-weight:550}
.voice-bars{display:flex;gap:3.5px;align-items:center;height:26px;flex-shrink:0}
.voice-bars i{
  width:3.5px;border-radius:3px;background:var(--grad);height:8px;
  animation:vb 1.1s ease-in-out infinite;
}
.voice-bars i:nth-child(2){animation-delay:.15s}
.voice-bars i:nth-child(3){animation-delay:.3s}
.voice-bars i:nth-child(4){animation-delay:.45s}
.voice-bars i:nth-child(5){animation-delay:.6s}
@keyframes vb{0%,100%{height:7px}50%{height:24px}}
.pip-frame{
  position:relative;width:200px;border-radius:20px;padding:12px;
  background:rgba(10,10,16,.85);border:1px solid rgba(255,255,255,.14);
  box-shadow:0 18px 50px rgba(0,0,0,.5);
}
.pip-label{
  position:absolute;top:-10px;left:14px;font-size:11px;font-weight:650;letter-spacing:.06em;
  background:var(--grad);color:#fff;border-radius:99px;padding:2.5px 10px;
}
.pip-target{animation:pulse 1.6s ease-in-out infinite;transform-origin:center}

/* ─── privacy stats ─── */
.stat-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:52px}
@media(min-width:720px){.stat-row{grid-template-columns:repeat(4,1fr)}}
.stat{
  text-align:center;padding:30px 12px;border-radius:var(--radius);
  border:1px solid var(--line);background:linear-gradient(170deg,rgba(255,255,255,.045),rgba(255,255,255,.01));
}
.stat b{
  display:block;font-size:clamp(34px,4.5vw,46px);font-weight:700;letter-spacing:-.02em;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat b i{font-style:normal;font-size:.42em;font-weight:650;margin-left:3px}
.stat span{display:block;margin-top:10px;font-size:13.5px;color:var(--txt3);font-weight:550}

/* ─── screenshots ─── */
.shots-scroll{
  display:flex;gap:22px;overflow-x:auto;padding:46px max(24px,calc((100vw - 1080px)/2 + 24px)) 30px;
  scroll-snap-type:x mandatory;scrollbar-width:none;
}
.shots-scroll::-webkit-scrollbar{display:none}
.shot{
  flex:0 0 auto;scroll-snap-align:center;margin:0;
  width:min(272px,70vw);border-radius:24px;overflow:hidden;
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 24px 70px rgba(0,0,0,.55);
  transition:transform .5s var(--ease);
}
.shot:hover{transform:translateY(-8px)}
.shot img{width:100%;height:auto;display:block}

/* ─── lineup (roadmap product cards) ─── */
.lineup{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px 14px;
  max-width:820px;margin:48px auto 10px;
}
@media(min-width:760px){.lineup{grid-template-columns:repeat(6,1fr)}}
.lineup-item{
  display:flex;flex-direction:column;align-items:center;gap:9px;text-align:center;
  transition:transform .4s var(--ease);
}
.lineup-item img{
  width:100%;max-width:92px;height:auto;
  filter:drop-shadow(0 10px 24px rgba(0,0,0,.45));
}
.lineup-item:not(.live){opacity:.8}
.lineup-item.live:hover{transform:translateY(-5px)}
.lineup-item b{font-size:14px;font-weight:600;margin-top:2px}
.lineup-tag{
  font-size:11.5px;font-weight:600;color:var(--txt3);
  border:1px solid var(--line);border-radius:99px;padding:2.5px 10px;
}
.lineup-tag.on{
  color:#7ee2c3;border-color:rgba(18,163,126,.55);background:rgba(12,128,96,.16);
}

/* ─── footer ─── */
.footer{border-top:1px solid var(--line);margin-top:90px;padding:46px 0 40px;background:var(--bg2)}
.footer-inner{display:flex;flex-wrap:wrap;gap:28px;justify-content:space-between;align-items:flex-start}
.footer-brand p{color:var(--txt3);font-size:13.5px;margin-top:6px}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--txt2)}
.footer-links a{transition:color .25s}
.footer-links a:hover{color:var(--txt)}
.footer-legal{margin-top:34px;padding-top:22px;border-top:1px solid var(--line)}
.footer-legal p{font-size:12.5px;color:var(--txt3)}

/* ─── reveal ─── */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .voice-bars i,.chip-dot,.pip-target{animation:none}
}