/* ===== TokenWise site — shared design system ===== */
:root{
  color-scheme:dark;
  --bg:#0a0b0e; --bg-elev:#0f1216; --surface:#14171c; --frame-bg:#0b0d10;
  --border:rgba(255,255,255,.08); --border-strong:rgba(255,255,255,.14);
  --text:#e9edf3; --muted:#9aa4b2; --faint:#6b7482;
  --accent:#8a7cff; --accent-2:#4aa8ff; --accent-soft:rgba(138,124,255,.16);
  --maxw:1120px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent-2);text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
h1,h2,h3{letter-spacing:-.02em;line-height:1.1;margin:0}

/* language show/hide — never mix */
html[data-lang="en"] [data-lang-block="zh"],
html[data-lang="zh"] [data-lang-block="en"]{display:none!important}

/* ===== nav ===== */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);background:rgba(10,11,14,.72);border-bottom:1px solid var(--border)}
.nav .container{display:flex;align-items:center;gap:20px;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:650;letter-spacing:-.01em;color:var(--text)}
.brand img{width:26px;height:26px;border-radius:7px}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:24px}
.nav-links a{color:var(--muted);font-size:15px}
.nav-links a:hover{color:var(--text)}
@media(max-width:720px){.nav-links a.hide-sm{display:none}}

/* language switcher */
.langsw{display:flex;gap:2px;background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:3px}
.langsw button{appearance:none;-webkit-appearance:none;border:0;background:transparent;color:var(--muted);font:inherit;font-size:13px;line-height:1;padding:6px 11px;border-radius:999px;cursor:pointer}
html[data-lang="en"] .langsw .lang-en,html[data-lang="zh"] .langsw .lang-zh{background:var(--accent-soft);color:#cdd4ff}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-size:15px;font-weight:600;padding:13px 22px;border-radius:12px;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease,color .15s ease;border:1px solid transparent;white-space:nowrap}
.btn-appstore{background:#fff;color:#0a0b0e;box-shadow:0 10px 34px -10px rgba(138,124,255,.55)}
.btn-appstore:hover{transform:translateY(-1px);box-shadow:0 14px 40px -10px rgba(138,124,255,.7)}
.btn-appstore svg{width:19px;height:19px}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border-strong)}
.btn-ghost:hover{border-color:var(--accent);color:#fff}
.btn-sm{padding:9px 16px;font-size:14px}

/* ===== hero ===== */
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.gradient{background:linear-gradient(96deg,#8ab0ff,#8a7cff 58%,#b98cff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero{position:relative;padding:78px 0 36px;text-align:center;overflow:hidden}
.hero .glow{position:absolute;inset:0;pointer-events:none;background:radial-gradient(58% 48% at 50% -6%,rgba(138,124,255,.24),transparent 70%),radial-gradient(40% 40% at 82% 18%,rgba(74,168,255,.12),transparent 70%)}
.hero .container{position:relative}
.hero h1{font-size:clamp(34px,6vw,62px);font-weight:720;margin:18px auto 0;max-width:17ch}
.hero .sub{color:var(--muted);font-size:clamp(16px,2.3vw,20px);max-width:60ch;margin:20px auto 0}
.hero .cta{margin-top:30px;display:flex;gap:14px;justify-content:center;align-items:center;flex-wrap:wrap}
.hero .note{margin-top:16px;color:var(--faint);font-size:13.5px}
.hero-visual{position:relative;margin:56px auto 0;max-width:940px}
.hero-visual .shot-overview{position:absolute;left:-18px;bottom:-34px;width:158px}
@media(max-width:640px){.hero-visual .shot-overview{display:none}}

/* ===== window frame / screenshots ===== */
.shot{border-radius:14px;background:var(--frame-bg) center/contain no-repeat;border:1px solid var(--border-strong);
  box-shadow:0 40px 90px -34px rgba(0,0,0,.85),0 0 0 1px rgba(255,255,255,.03),0 0 70px -24px rgba(138,124,255,.28)}
.shot[data-shot="overview"]{aspect-ratio:732/1222}
.shot[data-shot="analysis"],.shot[data-shot="conversations"]{aspect-ratio:1600/1074}
.shot[data-shot="settings"]{aspect-ratio:1200/1200}
html[data-lang="en"] .shot[data-shot="overview"]{background-image:url(en/overview.webp)}
html[data-lang="zh"] .shot[data-shot="overview"]{background-image:url(zh/overview.webp)}
html[data-lang="en"] .shot[data-shot="analysis"]{background-image:url(en/analysis.webp)}
html[data-lang="zh"] .shot[data-shot="analysis"]{background-image:url(zh/analysis.webp)}
html[data-lang="en"] .shot[data-shot="conversations"]{background-image:url(en/conversations.webp)}
html[data-lang="zh"] .shot[data-shot="conversations"]{background-image:url(zh/conversations.webp)}
html[data-lang="en"] .shot[data-shot="settings"]{background-image:url(en/settings.webp)}
html[data-lang="zh"] .shot[data-shot="settings"]{background-image:url(zh/settings.webp)}

/* ===== sources strip ===== */
.sources{padding:24px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--bg-elev)}
.sources .container{display:flex;align-items:center;justify-content:center;gap:10px 30px;flex-wrap:wrap;font-weight:600;font-size:15px}
.sources .lead{color:var(--faint);font-weight:500}
.sources b{color:var(--text);font-weight:600}
.sources .dot{color:var(--accent);opacity:.6}

/* ===== feature rows ===== */
.feature{padding:88px 0}
.feature .row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.feature.rev .figure{grid-column:1;grid-row:1}
.feature.rev .copy{grid-column:2;grid-row:1}
.feature h2{font-size:clamp(26px,3.6vw,40px);font-weight:700;margin-bottom:16px}
.feature .lead{color:var(--muted);font-size:17px;margin:0 0 20px}
.feature ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:11px}
.feature li{display:flex;gap:11px;color:var(--text);font-size:15.5px}
.feature li svg{flex:none;width:18px;height:18px;margin-top:3px;color:var(--accent)}
.figure--narrow{max-width:330px;margin:0 auto}
@media(max-width:820px){
  .feature{padding:56px 0}
  .feature .row{grid-template-columns:1fr;gap:34px}
  .feature.rev .figure,.feature.rev .copy{grid-column:1}
  .feature.rev .figure{grid-row:2}
}

/* ===== privacy band ===== */
.privacy{padding:72px 0}
.privacy .card{position:relative;overflow:hidden;border:1px solid var(--border);border-radius:24px;background:linear-gradient(180deg,rgba(138,124,255,.09),rgba(74,168,255,.04));padding:60px 40px;text-align:center}
.privacy .lock{width:50px;height:50px;margin:0 auto 18px;color:var(--accent)}
.privacy h2{font-size:clamp(24px,3.4vw,36px);margin-bottom:14px}
.privacy p{color:var(--muted);max-width:62ch;margin:0 auto 10px;font-size:16.5px}
.privacy .pill{display:inline-block;margin:18px 8px 0;background:var(--surface);border:1px solid var(--border-strong);border-radius:999px;padding:7px 16px;color:#cdd4ff;font-size:14px;font-weight:600}
.privacy .more-link{display:inline-block;margin-top:20px;font-weight:600}

/* ===== more features grid ===== */
.more{padding:14px 0 88px}
.more h2{text-align:center;font-size:clamp(24px,3.4vw,34px);margin-bottom:40px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:24px;transition:border-color .15s ease,transform .15s ease}
.card:hover{border-color:var(--border-strong);transform:translateY(-2px)}
.card .ic{width:26px;height:26px;color:var(--accent);margin-bottom:13px}
.card h3{font-size:16.5px;margin-bottom:6px}
.card p{color:var(--muted);font-size:14.5px;margin:0}
@media(max-width:820px){.grid{grid-template-columns:1fr 1fr;gap:14px}}
@media(max-width:520px){.grid{grid-template-columns:1fr}}

/* ===== final cta ===== */
.final{padding:56px 0 92px;text-align:center}
.final h2{font-size:clamp(26px,4vw,42px);margin-bottom:12px}
.final p{color:var(--muted);margin:0 0 26px}

/* ===== footer ===== */
.footer{border-top:1px solid var(--border);padding:32px 0;background:var(--bg-elev)}
.footer .container{display:flex;align-items:center;gap:18px;flex-wrap:wrap;color:var(--faint);font-size:14px}
.footer .brand{color:var(--muted);font-weight:600}
.footer .links{display:flex;gap:18px;margin-left:auto}
.footer a{color:var(--muted)}.footer a:hover{color:var(--text)}

/* ===== content pages (privacy / support) ===== */
.doc{max-width:760px;margin:0 auto;padding:52px 24px 96px}
.doc h1{font-size:32px;margin:0 0 6px}
.doc h2{font-size:20px;margin:38px 0 10px;color:#fff}
.doc h3{font-size:16px;margin:22px 0 4px;color:#fff}
.doc .sub{color:var(--muted);margin:0 0 14px}
.doc .badge{display:inline-block;background:var(--accent-soft);color:#cdd4ff;border:1px solid var(--border-strong);border-radius:999px;padding:5px 14px;font-size:13px}
.doc p{color:#c7ced8}.doc strong{color:#fff}
.doc ul{padding-left:20px}.doc li{margin:6px 0;color:#c7ced8}

/* ===== scroll reveal ===== */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}