:root{
  --bg:#080808;--panel:#0d0d10;--panel2:#111116;--text:#f6f7fb;--muted:#989daa;
  --line:rgba(255,255,255,.09);--line2:rgba(255,255,255,.14);--glow:rgba(115,105,255,.22);
  --max:1180px;--header:76px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{
  margin:0;background:
    radial-gradient(900px 480px at 12% 2%,rgba(55,71,255,.11),transparent 62%),
    radial-gradient(740px 520px at 88% 10%,rgba(183,67,255,.08),transparent 62%),
    var(--bg);
  color:var(--text);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
img{max-width:100%}
.site-header{
  height:var(--header);position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);
  background:rgba(8,8,8,.78);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)
}
.header-inner{height:100%;max-width:var(--max);margin:auto;padding:0 24px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:14px;min-width:0}
.brand img{width:160px;height:auto;display:block}
.brand-sep{height:22px;width:1px;background:var(--line2)}
.brand-support{font-size:12px;letter-spacing:.16em;color:#aeb4c1;white-space:nowrap}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.header-link,.lang-toggle,.request-btn{
  min-height:40px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;
  border:1px solid var(--line);padding:0 15px;color:#c9cdd6;font-size:12px;letter-spacing:.05em;
  background:rgba(255,255,255,.018)
}
.header-link:hover,.lang-toggle:hover{border-color:var(--line2);color:#fff}
.request-btn{background:#fff;color:#080808;border-color:#fff;font-weight:750}
.request-btn:hover{opacity:.88}
.lang-toggle{cursor:pointer;gap:5px}
.lang-toggle span{opacity:.45}
.lang-toggle[data-lang="en"] .en,.lang-toggle[data-lang="vi"] .vi{opacity:1;color:#fff}
.mobile-menu{display:none}
.hero{padding:94px 24px 74px;text-align:center;position:relative;overflow:hidden}
.hero:before{
  content:"";position:absolute;left:50%;top:35%;transform:translate(-50%,-50%);
  width:760px;height:420px;border-radius:50%;background:radial-gradient(circle,var(--glow),transparent 68%);
  filter:blur(12px);pointer-events:none
}
.eyebrow{position:relative;font-size:11px;letter-spacing:.28em;color:#9298a7;margin-bottom:18px}
.hero h1{position:relative;margin:0 auto;font-size:clamp(44px,7.5vw,88px);line-height:.92;letter-spacing:-.055em;max-width:980px}
.hero-copy{position:relative;max-width:680px;margin:22px auto 0;color:#a5aab5;line-height:1.72;font-size:16px}
.search-wrap{position:relative;max-width:820px;margin:38px auto 0}
.search-box{
  display:flex;align-items:center;gap:13px;padding:0 18px;border-radius:18px;border:1px solid var(--line2);
  background:rgba(14,14,18,.88);box-shadow:0 24px 80px rgba(0,0,0,.32),0 0 0 1px rgba(255,255,255,.015)
}
.search-icon{font-size:18px;color:#7f8594}
.search-input{width:100%;height:64px;border:0;outline:0;background:transparent;color:#fff;font-size:16px}
.search-input::placeholder{color:#6f7480}
.search-results{
  display:none;position:absolute;top:72px;left:0;right:0;background:#0c0c10;border:1px solid var(--line2);
  border-radius:17px;padding:8px;text-align:left;box-shadow:0 28px 70px rgba(0,0,0,.48);z-index:30
}
.search-results.show{display:block}
.search-result{display:block;padding:14px 15px;border-radius:12px}
.search-result:hover,.search-result.active{background:rgba(255,255,255,.05)}
.search-result b{display:block;font-size:14px;margin-bottom:5px}
.search-result span{font-size:12px;color:#8f95a3;line-height:1.45}
.section{max-width:var(--max);margin:0 auto;padding:72px 24px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
.section-kicker{font-size:11px;letter-spacing:.22em;color:#777e8d;margin-bottom:9px}
.section h2{margin:0;font-size:clamp(30px,4vw,50px);letter-spacing:-.045em}
.section-desc{max-width:540px;color:#8f95a2;line-height:1.65;font-size:14px}
.category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.category-card{
  min-height:170px;padding:26px;border:1px solid var(--line);border-radius:20px;background:
  linear-gradient(145deg,rgba(255,255,255,.035),rgba(255,255,255,.012));
  display:flex;gap:20px;transition:.25s ease
}
.category-card:hover{transform:translateY(-2px);border-color:rgba(147,139,255,.35);box-shadow:0 18px 55px rgba(0,0,0,.24)}
.cat-icon{
  width:46px;height:46px;border:1px solid var(--line2);border-radius:14px;display:grid;place-items:center;
  font-size:18px;background:rgba(255,255,255,.025);flex:none
}
.category-card h3{margin:2px 0 8px;font-size:19px;letter-spacing:-.02em}
.category-card p{margin:0;color:#8f95a3;line-height:1.55;font-size:13px}
.card-meta{display:flex;align-items:center;gap:8px;margin-top:18px;font-size:11px;color:#6f7583;letter-spacing:.08em;text-transform:uppercase}
.popular-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line)}
.popular-link{padding:20px 22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);font-size:14px;display:flex;justify-content:space-between;gap:12px;align-items:center}
.popular-link:hover{background:rgba(255,255,255,.025)}
.popular-link span:last-child{color:#6f7583}
.cta{
  margin:44px auto 80px;max-width:calc(var(--max) - 48px);padding:42px;border:1px solid rgba(139,128,255,.22);
  border-radius:24px;background:
  radial-gradient(600px 200px at 50% 120%,rgba(88,85,255,.16),transparent 70%),
  rgba(255,255,255,.02);display:flex;align-items:center;justify-content:space-between;gap:24px
}
.cta h3{margin:0 0 8px;font-size:28px;letter-spacing:-.04em}.cta p{margin:0;color:#9096a4;line-height:1.6}
.cta .request-btn{min-height:48px;padding:0 22px;white-space:nowrap}
.footer{border-top:1px solid var(--line);padding:34px 24px 46px;color:#777d89;font-size:12px}
.footer-inner{max-width:var(--max);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:22px}
.footer-links{display:flex;gap:22px;flex-wrap:wrap}.footer a:hover{color:#fff}
.breadcrumbs{max-width:var(--max);margin:0 auto;padding:34px 24px 0;color:#7c8290;font-size:12px}
.breadcrumbs a:hover{color:#fff}
.page-hero{max-width:var(--max);margin:auto;padding:44px 24px 42px}
.page-hero h1{font-size:clamp(38px,6vw,68px);letter-spacing:-.05em;line-height:.98;margin:0 0 16px;max-width:900px}
.page-hero p{max-width:720px;margin:0;color:#979daa;line-height:1.7}
.article-list{max-width:var(--max);margin:auto;padding:0 24px 80px}
.article-row{display:block;padding:20px 0;border-bottom:1px solid var(--line)}
.article-row h3{margin:0 0 7px;font-size:17px}.article-row p{margin:0;color:#858b99;line-height:1.5;font-size:13px}
.article-layout{max-width:var(--max);margin:auto;padding:18px 24px 84px;display:grid;grid-template-columns:minmax(0,760px) 280px;gap:74px}
.article-main h1{font-size:clamp(38px,5.4vw,64px);line-height:1.02;letter-spacing:-.05em;margin:14px 0 18px}
.article-excerpt{font-size:17px;line-height:1.7;color:#9ea4b0;border-bottom:1px solid var(--line);padding-bottom:28px;margin-bottom:34px}
.article-section{margin:0 0 34px}.article-section h2{font-size:22px;margin:0 0 12px;letter-spacing:-.025em}
.article-section p{margin:0;color:#b3b7c1;line-height:1.82;font-size:15px}
.article-note{border:1px solid var(--line);border-radius:16px;padding:18px;margin-top:38px;color:#8f95a2;font-size:13px;line-height:1.6;background:rgba(255,255,255,.018)}
.article-side{position:sticky;top:104px;align-self:start}
.side-card{border:1px solid var(--line);border-radius:18px;padding:18px;background:rgba(255,255,255,.018)}
.side-title{font-size:11px;letter-spacing:.18em;color:#737987;margin-bottom:10px}
.side-link{display:block;padding:11px 9px;border-radius:10px;font-size:13px;color:#aeb3bf}
.side-link:hover{background:rgba(255,255,255,.04);color:#fff}
.feedback{margin-top:36px;border-top:1px solid var(--line);padding-top:24px;display:flex;align-items:center;gap:10px;color:#8e94a1;font-size:13px}
.feedback button{border:1px solid var(--line);background:transparent;color:#aaa;border-radius:999px;padding:8px 13px;cursor:pointer}
.feedback button:hover{border-color:var(--line2);color:#fff}
.feedback .thanks{display:none;color:#bfc4cf}
.contact-shell{max-width:860px;margin:auto;padding:56px 24px 90px}
.contact-shell h1{font-size:clamp(42px,7vw,72px);letter-spacing:-.05em;margin:0 0 18px}
.contact-shell>p{color:#969ca9;line-height:1.7;max-width:700px}
.contact-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:34px}
.contact-card{padding:24px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.018)}
.contact-card h3{margin:0 0 8px}.contact-card p{margin:0;color:#8e94a2;font-size:13px;line-height:1.6}
.contact-actions{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.secondary-btn{min-height:48px;padding:0 20px;border-radius:999px;border:1px solid var(--line2);display:inline-flex;align-items:center}
.secondary-btn:hover{border-color:#fff}
.not-found{text-align:center;min-height:72vh;display:grid;place-items:center;padding:60px 24px}
.not-found h1{font-size:clamp(62px,12vw,150px);letter-spacing:-.06em;margin:0}
.not-found h2{font-size:28px;margin:8px 0 12px}.not-found p{color:#8d93a0;margin:0 0 26px}
[data-lang-copy]{display:none}
html[data-lang="en"] [data-lang-copy="en"],html[data-lang="vi"] [data-lang-copy="vi"]{display:block}
html[data-lang="en"] [data-inline-en],html[data-lang="vi"] [data-inline-vi]{display:inline}
[data-inline-en],[data-inline-vi]{display:none}
@media(max-width:900px){
  :root{--header:68px}
  .brand img{width:134px}.brand-support{display:none}.brand-sep{display:none}
  .header-link{display:none}.category-grid,.popular-grid,.contact-cards{grid-template-columns:1fr}
  .article-layout{grid-template-columns:1fr;gap:34px}.article-side{position:static}
  .section-head,.cta{align-items:flex-start;flex-direction:column}
}
@media(max-width:620px){
  .header-inner{padding:0 16px;gap:10px}.brand img{width:122px}
  .request-btn{padding:0 12px;font-size:11px}.lang-toggle{padding:0 11px}
  .hero{padding:68px 18px 56px}.hero h1{font-size:45px}.search-input{height:58px}
  .section{padding:56px 18px}.category-card{padding:21px;min-height:154px}.cat-icon{width:42px;height:42px}
  .breadcrumbs,.page-hero,.article-list,.article-layout{padding-left:18px;padding-right:18px}
  .cta{margin-left:18px;margin-right:18px;padding:28px}.footer-inner{align-items:flex-start;flex-direction:column}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.category-card{transition:none}}


/* ===== DEDICATED SUPPORT REQUEST FORM ===== */
.support-form-page{
  max-width:1180px;
  margin:0 auto;
  padding:64px 24px 92px;
}
.support-form-hero{
  max-width:860px;
  margin:0 auto 34px;
  text-align:center;
}
.support-form-hero h1{
  margin:8px 0 18px;
  font-size:clamp(44px,7vw,78px);
  line-height:.96;
  letter-spacing:-.055em;
}
.support-form-hero p{
  max-width:760px;
  margin:0 auto;
  color:#989eab;
  line-height:1.75;
  font-size:15px;
}
.support-form-tips{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:9px;
  margin-top:24px;
}
.support-form-tips span{
  display:inline-flex;
  align-items:center;
  min-height:34px;
  padding:0 13px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(255,255,255,.02);
  color:#aeb4bf;
  font-size:11px;
  letter-spacing:.04em;
}
.support-form-card{
  overflow:hidden;
  border:1px solid var(--line2);
  border-radius:24px;
  background:#0b0b0e;
  box-shadow:0 34px 90px rgba(0,0,0,.34);
}
.support-form-topbar{
  min-height:58px;
  padding:0 18px;
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  color:#858b98;
  font-size:10px;
  letter-spacing:.14em;
}
.support-form-topbar>div{
  display:flex;
  align-items:center;
  gap:9px;
}
.support-form-status-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:#b9c4ff;
  box-shadow:0 0 12px rgba(145,160,255,.72);
}
.support-form-topbar a{
  color:#aeb4c0;
  letter-spacing:.06em;
}
.support-form-topbar a:hover{
  color:#fff;
}
.support-form-frame-wrap{
  position:relative;
  width:100%;
  min-height:1080px;
  background:#fff;
}
.support-form-frame{
  display:block;
  width:100%;
  min-height:1080px;
  height:1080px;
  border:0;
  background:#fff;
}
.support-form-fallback{
  padding:28px;
  text-align:center;
}
.support-form-note{
  max-width:850px;
  margin:34px auto 0;
  padding:24px 26px;
  border:1px solid var(--line);
  border-radius:18px;
  background:rgba(255,255,255,.016);
}
.support-form-note h2{
  margin:0 0 10px;
  font-size:13px;
  letter-spacing:.15em;
}
.support-form-note p{
  margin:0;
  color:#8e95a2;
  font-size:13px;
  line-height:1.7;
}
@media(max-width:700px){
  .support-form-page{padding:44px 16px 70px}
  .support-form-hero{margin-bottom:24px}
  .support-form-card{border-radius:18px}
  .support-form-topbar{
    align-items:flex-start;
    flex-direction:column;
    padding:16px;
  }
  .support-form-frame-wrap,
  .support-form-frame{
    min-height:1200px;
    height:1200px;
  }
  .support-form-note{padding:20px}
}