/* Sweet Intelligence Limited (Hong Kong). Shared stylesheet. Clean, high-contrast, generous white space. */

:root{
  --black:#0d0d0d;
  --ink:#1f1f1f;
  --body:#3c3c43;
  --muted:#6e6e80;
  --line:#e6e6e6;
  --line-soft:#f0f0f0;
  --surface:#f7f7f8;
  --surface-2:#fbfbfc;
  --white:#ffffff;
  --accent:#0d0d0d;
  --radius-sm:12px;
  --radius:16px;
  --radius-lg:24px;
  --maxw:1120px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--white);
  color:var(--body);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.6;
  font-feature-settings:"cv05" 1,"cv11" 1;
  -webkit-font-smoothing:antialiased;
}
::selection{background:#1f1f1f;color:#fff}
a{color:inherit}
img,svg{max-width:100%}
h1,h2,h3,h4{color:var(--black);margin:0;letter-spacing:-0.02em;font-weight:600;line-height:1.1}
p{margin:0}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
@media (max-width:640px){ .wrap{padding:0 20px} }

.eyebrow{
  font-size:13px;font-weight:500;letter-spacing:.02em;color:var(--muted);
  text-transform:none;margin:0 0 20px;
}
.section{padding:96px 0;border-top:1px solid var(--line-soft)}
.section:first-of-type{border-top:none}
@media (max-width:720px){ .section{padding:64px 0} }
.section-label{
  font-size:13px;font-weight:500;color:var(--muted);margin:0 0 16px;
}
.section-h{font-size:clamp(30px,4vw,44px);max-width:20ch;margin:0 0 16px}
.section-sub{font-size:clamp(17px,1.6vw,19px);color:var(--muted);max-width:60ch;margin:0 0 48px}

/* ---------- Nav ---------- */
.nav{
  position:sticky;top:0;z-index:40;background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line-soft);
}
.nav .bar{display:flex;align-items:center;gap:28px;height:64px;max-width:var(--maxw);margin:0 auto;padding:0 24px}
@media (max-width:640px){ .nav .bar{padding:0 20px;gap:16px} }
.nav a{text-decoration:none}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--black)}
.wordmark{font-size:16px;font-weight:600;letter-spacing:-0.02em;color:var(--black);white-space:nowrap}
.nav .links{display:flex;gap:24px;align-items:center;margin-left:8px}
.nav .links a{font-size:14px;color:var(--body);font-weight:450;transition:color .15s ease}
.nav .links a:hover{color:var(--black)}
@media (max-width:820px){
  .nav .bar{height:auto;flex-wrap:wrap;padding-top:12px;padding-bottom:12px;gap:12px 20px}
  .nav .links{order:3;flex-basis:100%;margin-left:0;gap:18px;overflow-x:auto}
  .nav .links a{font-size:13.5px;white-space:nowrap}
}
.nav .right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav .back{font-size:14px;color:var(--muted)}
.nav .back:hover{color:var(--black)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:500;text-decoration:none;cursor:pointer;
  transition:background .15s ease,color .15s ease,border-color .15s ease,transform .15s ease;
}
.btn-primary{background:var(--black);color:#fff}
.btn-primary:hover{background:#333;transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--black);border-color:var(--line)}
.btn-ghost:hover{background:var(--surface)}
.btn .arrow{font-size:16px;line-height:1}

/* ---------- Hero ---------- */
.hero{padding:88px 0 72px}
@media (max-width:720px){ .hero{padding:56px 0 48px} }
.hero h1{
  font-size:clamp(40px,6.2vw,76px);
  max-width:16ch;margin:0 0 24px;font-weight:600;letter-spacing:-0.03em;
}

.hero .lede{font-size:clamp(18px,1.9vw,21px);color:var(--muted);max-width:52ch;margin:0 0 36px}
.hero .actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:44px}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;padding:7px 14px;border-radius:999px;
  background:var(--surface);color:var(--ink);font-size:14px;font-weight:450;
  border:1px solid var(--line-soft);
}

/* ---------- Cards ---------- */
.grid{display:grid;gap:20px}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media (max-width:980px){ .grid-4{grid-template-columns:repeat(2,1fr)} }
@media (max-width:700px){ .grid-4{grid-template-columns:1fr} }

.card{
  background:var(--surface);border:1px solid var(--line-soft);
  border-radius:var(--radius);padding:28px;
  display:flex;flex-direction:column;
  transition:background .15s ease,transform .15s ease,box-shadow .15s ease;
}
.card:hover{background:var(--surface-2);transform:translateY(-2px);box-shadow:0 6px 24px rgba(13,13,13,.06)}
.card .num{font-size:13px;font-weight:500;color:var(--muted);margin-bottom:16px}
.card h3{font-size:20px;margin:0 0 10px;letter-spacing:-0.01em}
.card p{font-size:15.5px;color:var(--body);margin:0 0 14px}
.card .meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  font-size:14px;color:var(--muted);
}

.closing{
  margin-top:28px;font-size:clamp(18px,2vw,22px);color:var(--black);
  max-width:46ch;font-weight:500;letter-spacing:-0.01em;
}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
@media (max-width:900px){ .steps{grid-template-columns:repeat(2,1fr)} }
@media (max-width:560px){ .steps{grid-template-columns:1fr} }
.step{padding:28px 24px 32px;border-right:1px solid var(--line);display:flex;flex-direction:column}
.step:last-child{border-right:none}
@media (max-width:900px){
  .step{border-bottom:1px solid var(--line)}
  .step:nth-child(2n){border-right:none}
}
@media (max-width:560px){ .step{border-right:none} }
.step .tag-step{font-size:13px;color:var(--muted);margin-bottom:12px}
.step h3{font-size:24px;margin:0 0 12px}
.step p{font-size:15.5px;color:var(--body);margin:0 0 16px}
.step .when{margin-top:auto;font-size:13.5px;color:var(--muted)}

/* ---------- Entity panel ---------- */
.entity{background:var(--surface);border-radius:var(--radius-lg);padding:56px 48px}
@media (max-width:720px){ .entity{padding:36px 24px} }
.entity-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:start}
@media (max-width:820px){ .entity-grid{grid-template-columns:1fr;gap:32px} }
.entity .mark{color:var(--black)}
.entity .mark .brand-lockup{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.entity .mark .wordmark{font-size:24px;letter-spacing:-0.025em}
.entity .blurb{font-size:19px;color:var(--black);max-width:34ch;letter-spacing:-0.01em}
.entity dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:10px 24px;font-size:15px}
.entity dt{color:var(--muted)}
.entity dd{margin:0;color:var(--ink)}

/* ---------- Footer ---------- */
.foot{border-top:1px solid var(--line);margin-top:96px;padding:56px 0 40px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
@media (max-width:820px){ .foot-grid{grid-template-columns:1fr 1fr;gap:32px} }
@media (max-width:560px){ .foot-grid{grid-template-columns:1fr} }
.foot .mark{color:var(--black)}
.brand-lockup{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot .addr{font-size:14px;color:var(--muted);line-height:1.7}
.foot h4{font-size:13px;color:var(--black);font-weight:600;margin:0 0 14px;letter-spacing:0}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.foot ul a{font-size:14px;color:var(--muted);text-decoration:none}
.foot ul a:hover{color:var(--black)}
.foot-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line-soft);
  font-size:13px;color:var(--muted);
}
.foot-legal nav a{text-decoration:none;color:var(--muted);margin-left:20px}
.foot-legal nav a:first-child{margin-left:0}
.foot-legal nav a:hover{color:var(--black)}

/* ---------- Long-form documents (privacy, terms, article) ---------- */
.doc-head{padding:72px 0 40px;border-bottom:1px solid var(--line-soft)}
.doc-head h1{font-size:clamp(34px,5vw,54px);max-width:18ch;margin:0 0 18px;letter-spacing:-0.03em}
.doc-head .meta{font-size:14px;color:var(--muted)}
.doc{max-width:760px;margin:0 auto;padding:0 24px}
.doc-body{padding:40px 0 24px}
.doc-body .lede,
.doc-head .lede,
.article-body .lede{font-size:20px;color:var(--black);margin:0 0 36px;letter-spacing:-0.01em}
.doc-head .lede{margin:0;max-width:56ch}
.article-body .lede{margin:36px 0 34px}
.doc-body h2{font-size:22px;margin:44px 0 14px}
.doc-body h3{font-size:18px;margin:28px 0 10px}
.doc-body p{margin:0 0 16px;font-size:16.5px}
.doc-body ul{margin:0 0 18px;padding-left:20px}
.doc-body li{margin-bottom:10px;font-size:16.5px}
.doc-body a{color:var(--black);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line)}
.doc-body a:hover{text-decoration-color:var(--black)}
.callout{
  background:var(--surface);border:1px solid var(--line-soft);
  border-radius:var(--radius-sm);padding:20px 24px;margin:28px 0;font-size:15.5px;
}
.callout p{margin:0}
.callout strong{color:var(--black)}
.notes{margin-top:56px;padding-top:24px;border-top:1px solid var(--line-soft);font-size:14px;color:var(--muted)}
.notes h3{font-size:13px;color:var(--black);margin:0 0 12px}
.notes ol{padding-left:20px;margin:0}
.notes li{margin-bottom:10px;font-size:14px}

/* ---------- Insights ---------- */
.post-card{
  display:grid;grid-template-columns:1fr;gap:40px;align-items:center;
  background:var(--surface);border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);padding:40px;
}
@media (max-width:820px){ .post-card{grid-template-columns:1fr;padding:28px;gap:24px} }
.post-card .kicker{font-size:13px;color:var(--muted);margin-bottom:14px}
.post-card h2{font-size:clamp(24px,3vw,34px);margin:0 0 14px}
.post-card h2 a{text-decoration:none}
.post-card h2 a:hover{color:var(--muted)}
.post-card .excerpt{font-size:16.5px;color:var(--body);margin:0 0 18px}
.post-card .byline{font-size:14px;color:var(--muted);margin-bottom:22px}

.article-body{max-width:760px;margin:0 auto;padding:0 24px}
.article-body p{margin:0 0 20px;font-size:17.5px;line-height:1.75}
.article-body h2{font-size:24px;margin:48px 0 14px}
.article-body ul{margin:0 0 20px;padding-left:20px}
.article-body li{margin-bottom:12px;font-size:17px;line-height:1.7}
.article-body blockquote{
  margin:36px 0;padding:24px 28px;background:var(--surface);
  border-radius:var(--radius);font-size:20px;color:var(--black);
  font-weight:500;letter-spacing:-0.01em;line-height:1.4;
}

.cta-band{
  background:var(--surface);border-radius:var(--radius-lg);
  padding:56px 48px;margin-top:64px;
}
@media (max-width:720px){ .cta-band{padding:36px 24px} }
.cta-band h2,
.cta-band h3{font-size:clamp(24px,3vw,34px);max-width:22ch;margin:0 0 14px}
.cta-band p{font-size:17px;color:var(--muted);max-width:52ch;margin:0 0 26px}

@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}