:root{--ink:#173f3c;--deep:#0d3936;--teal:#1d756e;--mint:#e9f4ef;--gold:#d8b85d;--cream:#fff4d2;--paper:#fffdf8;--line:rgba(23,63,60,.14)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif;line-height:1.65}a{color:inherit;text-decoration:none}em{color:var(--teal);font-family:Georgia,serif;font-weight:400}nav{height:86px;padding:0 7vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:rgba(255,253,248,.95);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:11px}.brand img{width:48px;height:48px;border-radius:50%;object-fit:cover}.brand span{display:flex;flex-direction:column;line-height:1.2}.brand b{font-family:Georgia,serif}.brand small{color:var(--teal);font-size:9px;letter-spacing:.13em;text-transform:uppercase}.navlinks{display:flex;gap:28px;font-size:14px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 24px;border-radius:7px;color:white;background:var(--teal);font-weight:700}.btn.small{padding:8px 18px;font-size:13px}.btn.full{width:100%;margin-top:18px}.hero{min-height:690px;padding:78px 8vw 90px;display:grid;grid-template-columns:1.15fr .85fr;gap:5vw;align-items:center;background:radial-gradient(circle at 84% 20%,#edf7f2 0,transparent 32%),linear-gradient(135deg,#fffdf8 55%,#fff6db)}.overline{color:var(--teal);font-size:12px;font-weight:800;letter-spacing:.18em}.hero h1,.heading h2,.info h2,.method h2,.cta h2{font-family:Georgia,serif;font-weight:500;line-height:1.08}.hero h1{font-size:clamp(48px,6vw,82px);margin:16px 0}.lead{font-size:20px;color:#506967;max-width:680px}.notice{margin-top:24px;padding:15px 18px;background:rgba(233,244,239,.72);border-left:3px solid var(--gold);display:grid}.notice span{color:#607674;font-size:14px}.actions{display:flex;gap:28px;align-items:center;margin-top:26px;font-weight:700}.trust{display:flex;gap:22px;flex-wrap:wrap;margin-top:34px;font-size:13px;color:#59706e}.visual{min-height:500px;position:relative}.logo{position:absolute;top:2%;left:8%;z-index:3;width:90px;height:90px;padding:5px;background:#fff;border-radius:50%}.logo img{width:100%;height:100%;object-fit:cover;border-radius:50%}.hanzi{position:absolute;inset:9% 5% 5% 13%;background:var(--deep);border-radius:160px 160px 16px 16px;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center}.hanzi strong{font-size:210px;color:#fff6de}.hanzi small{margin-top:28px;letter-spacing:.18em;text-transform:uppercase;font-size:10px}.bubble{position:absolute;right:-3%;bottom:3%;z-index:4;padding:19px 25px;background:var(--cream);border:1px solid #ead392;border-radius:9px}.section{padding:100px 8vw}.heading{max-width:760px;margin:0 auto 52px;text-align:center}.heading h2,.info h2,.method h2{font-size:clamp(35px,4.2vw,58px);margin:14px 0 20px}.heading p,.info p{color:#607674;font-size:17px}.features{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.features article{padding:31px 26px;border:1px solid var(--line);border-radius:10px;background:#fff}.features i,.policies i{width:48px;height:48px;display:grid;place-items:center;border-radius:50%;background:var(--mint);font-style:normal}.features h3,.community-card h3{font-family:Georgia,serif}.audience{background:var(--mint)}.checks{max-width:980px;margin:auto;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.checks div{padding:19px 22px;background:rgba(255,255,255,.8);border-radius:7px;font-weight:700}.method{background:var(--deep);color:white;display:grid;grid-template-columns:1.15fr .85fr;gap:10vw;align-items:center}.method p{color:#c9dad8}.gold{color:#e4c96e}.flow{padding:30px;border:1px solid rgba(255,255,255,.18);border-radius:80px}.flow div{height:82px;padding:0 25px;display:flex;align-items:center;gap:20px;background:rgba(255,255,255,.08);border-radius:50px}.flow div+div{margin-top:14px}.flow b{font-family:Georgia,serif;font-size:24px}.curriculum{max-width:1080px;margin:auto;display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.curriculum div{padding:21px 12px;border:1px solid var(--line);background:#fff;text-align:center;border-radius:8px}.curriculum small{display:block;color:var(--gold)}.info{display:grid;grid-template-columns:1fr 1fr;gap:8vw;background:#f8f4e9;align-items:center}.infocard{background:#fff;border-radius:12px;padding:20px 35px}.infocard div{padding:18px 0;display:flex;justify-content:space-between;border-bottom:1px solid var(--line)}.policies{display:grid;grid-template-columns:1fr 1fr;gap:22px}.policies article{padding:45px;border-radius:12px}.record{background:var(--mint)}.copyright{background:var(--cream)}.community-card{max-width:780px;margin:auto;border:1px solid var(--line);border-radius:14px;padding:32px;display:grid;grid-template-columns:68px 1fr;gap:22px;background:linear-gradient(135deg,#fff 55%,#eef7f2)}.community-icon{width:58px;height:58px;border-radius:50%;background:var(--deep);color:#fff;display:grid;place-items:center;font:28px Georgia,serif}.community-link{display:inline-block;margin:8px 8px 0 0;padding:10px 13px;border-radius:7px;background:var(--teal);color:#fff;font-weight:700;font-size:13px}.community-link.secondary{background:#fff;color:var(--teal);border:1px solid var(--teal)}.faq{background:#f4f8f5}.faq details{max-width:850px;margin:auto;padding:20px 4px;border-bottom:1px solid var(--line)}summary{font-family:Georgia,serif;font-size:20px;font-weight:700;cursor:pointer}.cta{text-align:center;color:#fff;background:var(--deep)}.cta h2{font-size:clamp(36px,5vw,62px)}.cta p{color:#c8d9d7}.yellow{color:var(--deep);background:var(--gold);margin:22px auto 12px}.cta small{display:block;color:#a9c1be}footer{padding:35px 8vw;display:flex;justify-content:space-between;align-items:center;font-size:13px}.mobile{display:none}@media(max-width:900px){.navlinks{display:none}.hero{grid-template-columns:1fr}.features{grid-template-columns:1fr 1fr}.checks{grid-template-columns:1fr 1fr}.method,.info{grid-template-columns:1fr}.curriculum{grid-template-columns:repeat(2,1fr)}.policies{grid-template-columns:1fr}}@media(max-width:600px){body{padding-bottom:64px}nav{height:72px;padding:0 18px}nav>.btn{display:none}.hero{padding:48px 22px 65px}.hero h1{font-size:45px}.actions{flex-direction:column;align-items:stretch}.visual{min-height:350px}.hanzi strong{font-size:145px}.section{padding:72px 22px}.features,.checks{grid-template-columns:1fr}.community-card{grid-template-columns:1fr;padding:24px}.mobile{display:flex;position:fixed;bottom:0;left:0;right:0;height:64px;align-items:center;justify-content:center;background:var(--gold);color:var(--deep);font-weight:800;z-index:30}footer{flex-direction:column;align-items:flex-start;gap:16px}}
/* V1.1 funnel patch: secondary research action only; no visual redesign */
.research-secondary{margin:.75rem 0 0;text-align:center;font-size:.9rem}.research-secondary a{text-decoration:underline}
/* V1.1 QA correction: contextual needs form + channel chooser */
.needs-card{margin-top:20px;padding:20px;border-radius:10px;background:var(--mint);border:1px solid var(--line)}
.needs-card h3{margin:7px 0 8px;font-family:Georgia,serif;font-size:22px;line-height:1.25}.needs-card p{margin:0 0 12px;font-size:14px;color:#506967}.needs-kicker{color:var(--teal);font-size:10px;font-weight:800;letter-spacing:.15em}.needs-link{display:inline-block;font-weight:800;color:var(--teal);text-decoration:underline;text-underline-offset:3px}.needs-card small{display:block;margin-top:7px;color:#607674;font-size:12px}.group-modal[hidden]{display:none}.modal-open{overflow:hidden}.group-modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:22px}.group-modal-backdrop{position:absolute;inset:0;background:rgba(13,57,54,.64);backdrop-filter:blur(3px)}.group-modal-panel{position:relative;z-index:1;width:min(620px,100%);padding:34px;border-radius:14px;background:var(--paper);box-shadow:0 24px 80px rgba(0,0,0,.22)}.group-modal-panel h2{margin:10px 34px 10px 0;font-family:Georgia,serif;font-size:32px;line-height:1.15}.group-modal-panel>p{color:#607674}.group-modal-close{position:absolute;right:16px;top:12px;border:0;background:transparent;color:var(--ink);font-size:30px;line-height:1;cursor:pointer}.group-options{display:grid;gap:12px;margin-top:20px}.group-option{display:grid;gap:4px;padding:17px 18px;border:1px solid var(--teal);border-radius:9px;background:#fff}.group-option.primary{background:var(--teal);color:#fff}.group-option span{font-size:13px;opacity:.82}.group-note{margin:16px 0 0!important;font-size:12px!important}.group-modal-panel .overline{font-size:10px}@media(max-width:600px){.group-modal{align-items:end;padding:12px}.group-modal-panel{padding:28px 20px 24px;border-radius:14px 14px 8px 8px}.group-modal-panel h2{font-size:27px}}

/* V1.1 QA3 — repair needs-card layout inside .infocard.
   The generic .infocard div rule made this nested card a flex row. */
.infocard .needs-card{
  display:block;
  margin-top:22px;
  padding:24px 24px 22px;
  border:1px solid rgba(29,117,110,.18);
  border-bottom:1px solid rgba(29,117,110,.18);
  border-radius:12px;
  background:var(--mint);
}
.infocard .needs-card .needs-kicker{
  display:block;
  margin:0 0 9px;
  color:var(--teal);
  font-size:10px;
  font-weight:800;
  letter-spacing:.15em;
}
.infocard .needs-card h3{
  margin:0 0 10px;
  max-width:560px;
  font-family:Georgia,serif;
  font-size:26px;
  line-height:1.22;
}
.infocard .needs-card p{
  margin:0 0 16px;
  max-width:600px;
  color:#506967;
  font-size:15px;
  line-height:1.6;
}
.infocard .needs-card .needs-link{
  display:inline-flex;
  align-items:center;
  width:auto;
  padding:11px 15px;
  border-radius:7px;
  background:#fff;
  color:var(--teal);
  border:1px solid rgba(29,117,110,.35);
  font-weight:800;
  line-height:1.35;
  text-decoration:none;
}
.infocard .needs-card small{
  display:block;
  margin-top:10px;
  color:#607674;
  font-size:12px;
  line-height:1.45;
}
@media(max-width:600px){
  .infocard{padding:18px 20px}
  .infocard .needs-card{padding:20px 18px}
  .infocard .needs-card h3{font-size:24px}
  .infocard .needs-card .needs-link{display:flex;width:100%;justify-content:center;text-align:center}
}

/* V1.1.1 — research CTA discoverability micro-UX patch.
   Keeps research secondary in hierarchy, but makes the action unmistakably clickable. */
.infocard .needs-card{
  background:linear-gradient(135deg,#eef8f3 0%,#fff4d2 100%);
  border:2px solid rgba(216,184,93,.72);
  box-shadow:0 8px 22px rgba(13,57,54,.08);
}
.infocard .needs-card .needs-kicker{
  color:var(--deep);
  font-size:11px;
}
.infocard .needs-card .needs-link{
  min-height:48px;
  padding:13px 20px;
  background:var(--teal);
  color:#fff;
  border:2px solid var(--teal);
  box-shadow:0 5px 14px rgba(29,117,110,.18);
  font-size:15px;
  cursor:pointer;
  transition:transform .15s ease,box-shadow .15s ease,background .15s ease;
}
.infocard .needs-card .needs-link:hover,
.infocard .needs-card .needs-link:focus-visible{
  background:var(--deep);
  border-color:var(--deep);
  box-shadow:0 7px 18px rgba(13,57,54,.22);
  transform:translateY(-1px);
  outline:none;
}
@media(max-width:600px){
  .infocard .needs-card .needs-link{min-height:52px;font-size:16px}
}

/* V1.1.3.3 — YouTube trust/content-evidence patch; no funnel redesign */
.youtube-proof{background:#fffdf8}.youtube-card{max-width:820px;margin:auto;padding:32px;border:1px solid var(--line);border-radius:14px;background:linear-gradient(135deg,#fff 55%,#fff6db);display:grid;grid-template-columns:68px 1fr;gap:22px}.youtube-mark{width:58px;height:58px;border-radius:50%;background:var(--deep);color:#fff;display:grid;place-items:center;font-size:21px;padding-left:3px}.youtube-card h3{margin:0 0 7px;font-family:Georgia,serif;font-size:25px}.youtube-card p{margin:0 0 16px;color:#607674}.youtube-topics{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px}.youtube-topics span{padding:7px 10px;border-radius:999px;background:var(--mint);color:var(--deep);font-size:12px;font-weight:700}.youtube-link{display:inline-flex;align-items:center;padding:11px 15px;border-radius:7px;background:var(--teal);color:#fff;font-weight:800;font-size:13px}.youtube-link:hover,.youtube-link:focus-visible{background:var(--deep);outline:none}@media(max-width:600px){.youtube-card{grid-template-columns:1fr;padding:24px}.youtube-link{display:flex;width:100%;justify-content:center;text-align:center;min-height:48px}.youtube-topics{gap:7px}}

/* V1.1.3.5 — community channel visibility: Telegram primary, Signal/Zalo alternatives */
.community-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}.community-actions .community-link{margin:0;display:grid;gap:2px;min-width:190px}.community-actions .community-link b{font-size:13px}.community-actions .community-link span{font-size:12px;font-weight:600;opacity:.9}@media(max-width:600px){.community-actions{display:grid;grid-template-columns:1fr}.community-actions .community-link{width:100%;min-width:0}}

/* V1.1.3.7 — Windows 11 Chromium text-render compatibility candidate.
   Regression evidence: Vietnamese glyphs partially disappeared on one Dell/Windows 11
   across Edge, Chrome and GanJing Browser while source text remained intact.
   Keep layout/content unchanged; avoid Segoe UI + Georgia paths on this candidate. */
html, body, button, input, select, textarea {
  font-family: Arial, "Helvetica Neue", "Noto Sans", sans-serif;
  font-synthesis: none;
  text-rendering: auto;
}
.hero h1,
.heading h2,
.info h2,
.method h2,
.cta h2,
.brand b,
.features h3,
.community-card h3,
.flow b,
summary,
.community-icon,
.needs-card h3,
.infocard .needs-card h3,
.group-modal-panel h2,
.youtube-card h3,
em {
  font-family: Cambria, "Times New Roman", serif;
  font-synthesis: none;
  text-rendering: auto;
}