:root{--bg:#e7e3db;--panel:#f4f2ed;--ink:#25231f;--mute:#6a655b;--gold:#a97a14;--goldf:#d9a62b;--line:#cfc9bc;--on-gold:#1d1608;
box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#1b1a17;--panel:#25231f;--ink:#efece4;--mute:#a7a194;--gold:#e0b04a;--line:#3a372f}}
:root[data-theme="dark"]{--bg:#1b1a17;--panel:#25231f;--ink:#efece4;--mute:#a7a194;--gold:#e0b04a;--line:#3a372f}
html{scroll-behavior:smooth;scroll-padding-top:calc(72px + env(safe-area-inset-top,0px));overflow-x:hidden}
body{overflow-x:hidden}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.65 "Be Vietnam Pro",system-ui,"Segoe UI",Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:3px solid var(--goldf);outline-offset:2px}
.wrap{width:min(1180px,100% - 40px);margin-inline:auto}
h1,h2,h3{font-weight:800;line-height:1.1;letter-spacing:-.02em;margin:0}
h2{font-size:clamp(28px,4.4vw,48px);max-width:18ch}
h3{font-size:19px;letter-spacing:-.01em}
p{margin:0}
.lead{color:var(--mute);max-width:62ch}
section{padding:clamp(56px,9vw,112px) 0}
.btn{display:inline-block;padding:14px 26px;border-radius:2px;font-weight:600;text-decoration:none;border:2px solid var(--ink);cursor:pointer;font:inherit;font-weight:600;background:none;color:var(--ink)}
.btn.gold{background:var(--goldf);border-color:var(--goldf);color:var(--on-gold)}
.btn:hover{filter:brightness(1.08)}
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{font-weight:800;letter-spacing:.06em;text-decoration:none;display:flex;align-items:center;gap:10px}
.brand i{width:14px;height:14px;background:var(--goldf);clip-path:polygon(25% 0,75% 0,100% 50%,75% 100%,25% 100%,0 50%)}
nav{display:flex;gap:22px;font-size:14px;font-weight:600}
nav a{text-decoration:none;color:var(--mute)}nav a:hover{color:var(--ink)}
@media(max-width:820px){nav{display:none}}
.hero{padding:clamp(36px,6vw,72px) 0 0}
.hero h1{font-size:clamp(38px,8vw,104px);max-width:13ch}
.hero .row{display:flex;flex-wrap:wrap;gap:28px 48px;align-items:end;justify-content:space-between;margin-top:28px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.strip{display:flex;gap:6px;height:clamp(180px,32vh,320px);margin-top:36px;overflow:hidden;overflow-x:hidden}
.strip figure{margin:0;flex:1;min-width:0;transition:flex .6s cubic-bezier(.2,.7,.2,1);cursor:pointer;overflow:hidden}
.strip figure:hover,.strip figure:focus-within{flex:3.2}
.strip img{width:100%;height:100%;object-fit:cover}
@media(max-width:700px){.strip figure:nth-child(n+5){display:none}}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));border-bottom:1px solid var(--line)}
.facts div{padding:22px 20px 22px 0;border-right:1px solid var(--line);padding-left:20px}
.facts div:first-child{padding-left:0}.facts div:last-child{border:0}
.facts b{display:block;font-size:22px;font-weight:800}.facts span{color:var(--mute);font-size:14px}
.about{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1.25fr);gap:clamp(24px,5vw,56px);align-items:center;overflow-x:hidden}
@media(max-width:820px){.about{grid-template-columns:1fr}}
.about img{
  width:min(100%,320px);
  max-width:320px;
  aspect-ratio:1/1;
  object-fit:contain;
  object-position:center;
  margin-inline:auto;
  background:var(--panel);
  border-radius:4px;
}
@media(max-width:820px){
  .about img{width:min(100%,240px);max-width:240px}
}
.about p+p{margin-top:14px}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:28px 0}
.filters button{padding:9px 18px;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:999px;font:inherit;font-size:14px;font-weight:600;cursor:pointer}
.filters button[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.carousel{
  position:relative;
  overflow:hidden;
  border-radius:4px;
  background:var(--panel);
  user-select:none;
  touch-action:pan-y;
}
.carousel-viewport{
  overflow:hidden;
  width:100%;
}
.carousel-track{
  display:flex;
  transition:transform .55s cubic-bezier(.22,1,.36,1);
  will-change:transform;
}
.carousel-slide{
  flex:0 0 100%;
  width:100%;
  position:relative;
  aspect-ratio:16/9;
  max-height:min(420px,58vw);
  background:var(--panel);
  cursor:zoom-in;
  border:0;padding:0;margin:0;
  overflow:hidden;
}
.carousel-slide img{
  width:100%;height:100%;
  object-fit:cover;object-position:center;
  display:block;
  pointer-events:none;
}
.carousel-slide em{
  position:absolute;left:0;bottom:0;
  background:var(--ink);color:var(--bg);
  font-style:normal;font-size:12px;font-weight:600;padding:5px 12px;
  z-index:2;
}
.carousel-nav{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:space-between;
  pointer-events:none;padding:0 10px;z-index:3;
}
.carousel-btn{
  pointer-events:auto;
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(6px);
  color:var(--ink);cursor:pointer;
  font-size:20px;font-weight:700;line-height:1;
  display:flex;align-items:center;justify-content:center;
  transition:filter .2s,transform .15s,background .2s;
  box-shadow:0 4px 16px rgba(0,0,0,.18);
}
.carousel-btn:hover{filter:brightness(1.08);background:var(--goldf);color:var(--on-gold);border-color:var(--goldf)}
.carousel-btn:active{transform:scale(.94)}
.carousel-dots{
  display:flex;justify-content:center;gap:7px;flex-wrap:wrap;
  margin-top:14px;padding:0 8px;
}
.carousel-dots button{
  width:8px;height:8px;border-radius:50%;padding:0;border:0;
  background:var(--line);cursor:pointer;transition:transform .2s,background .2s;
}
.carousel-dots button[aria-current=true]{
  background:var(--goldf);transform:scale(1.35);
}
.carousel-counter{
  text-align:center;font-size:13px;color:var(--mute);margin-top:8px;font-weight:600;
}
/* giữ class .gal trống để JS cũ không lỗi nếu còn */
.gal{display:none}

dialog{border:0;padding:0;background:#0e0d0b;color:#efece4;width:min(1100px,96vw);max-height:94vh}
dialog::backdrop{background:rgba(10,9,8,.86)}
dialog img{width:100%;max-height:74vh;object-fit:contain;background:#0e0d0b}
.lb-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;flex-wrap:wrap}
.lb-bar button{background:none;border:1px solid #6a655b;color:#efece4;padding:8px 14px;cursor:pointer;font:inherit;font-size:14px}
.svc{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:0;margin-top:40px;border-top:2px solid var(--ink)}
.svc article{padding:28px 28px 28px 0}
.svc article+article{padding-left:28px;border-left:1px solid var(--line)}
@media(max-width:900px){.svc article,.svc article+article{padding:24px 0;border-left:0;border-bottom:1px solid var(--line)}}
.svc ul{padding-left:18px;color:var(--mute);margin:14px 0 0}
.svc li{margin-bottom:6px}
.pk{margin-top:36px;border-top:2px solid var(--ink)}
.pk div{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.6fr) minmax(0,1.4fr) auto;gap:20px;padding:22px 0;border-bottom:1px solid var(--line);align-items:center}
.pk div.best{background:var(--panel);padding-inline:18px;margin-inline:-18px;border-left:4px solid var(--goldf)}
.pk small{color:var(--mute);font-size:14px;display:block}
@media(max-width:860px){.pk div{grid-template-columns:1fr;gap:8px}}
.steps{list-style:none;margin:40px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;counter-reset:s}
.steps li{counter-increment:s;background:var(--panel);padding:22px;border-top:3px solid var(--goldf)}
.steps li::before{content:counter(s);display:block;font-weight:800;font-size:34px;color:var(--gold);line-height:1}
.steps h3{margin:10px 0 6px}.steps p{color:var(--mute);font-size:15px}
.ref{background:var(--ink);color:var(--bg)}
.ref .num{display:flex;flex-wrap:wrap;gap:12px 56px;margin:32px 0}
.ref .num b{display:block;font-size:clamp(32px,5vw,56px);font-weight:800;line-height:1;color:var(--goldf)}
.ref .num span{font-size:14px;opacity:.75}
.ref p{max-width:68ch;opacity:.85}
.pay{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:36px}
@media(max-width:760px){.pay{grid-template-columns:1fr}}
.pay div{background:var(--panel);padding:24px}
.pay b{font-size:48px;font-weight:800;color:var(--gold);line-height:1;display:block;margin-bottom:8px}
.pay p{color:var(--mute);font-size:15px;margin-top:6px}
.pledge{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:28px 40px;margin-top:36px}
.pledge p{color:var(--mute)}
.contact{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:clamp(28px,6vw,80px)}
@media(max-width:860px){.contact{grid-template-columns:1fr}}
.contact dl{margin:28px 0 0}.contact dt{color:var(--mute);font-size:14px;margin-top:14px}.contact dd{margin:0;font-weight:600}
form{background:var(--panel);padding:clamp(20px,4vw,36px);display:grid;gap:14px}
label{font-size:14px;font-weight:600;display:grid;gap:6px}
input,select,textarea{font:inherit;padding:12px;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:2px;width:100%}
footer{padding:28px 0;border-top:1px solid var(--line);color:var(--mute);font-size:14px}
.zalo{position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:15;background:var(--goldf);color:var(--on-gold);font-weight:800;text-decoration:none;padding:13px 20px;border-radius:999px;box-shadow:0 6px 20px rgba(0,0,0,.25)}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* ========== HIỆU ỨNG HIỂN THỊ CHỮ & KHỐI – CHẬM, NHIỀU LAYER ========== */
.reveal{
  opacity:0;
  transform:translateY(56px);
  filter:blur(6px);
  transition:
    opacity 1.15s cubic-bezier(.22,1,.36,1),
    transform 1.15s cubic-bezier(.22,1,.36,1),
    filter 1.15s cubic-bezier(.22,1,.36,1);
  will-change:opacity,transform,filter;
}
.reveal.revealed{
  opacity:1;
  transform:translateY(0);
  filter:blur(0);
}
.reveal-d1{transition-delay:.12s}
.reveal-d2{transition-delay:.24s}
.reveal-d3{transition-delay:.36s}
.reveal-d4{transition-delay:.48s}
.reveal-d5{transition-delay:.6s}
.reveal-d6{transition-delay:.72s}
.reveal-d7{transition-delay:.84s}
.reveal-d8{transition-delay:.96s}

.reveal-left{
  opacity:0;
  transform:translateX(-52px);
  filter:blur(5px);
  transition:opacity 1.1s cubic-bezier(.22,1,.36,1),transform 1.1s cubic-bezier(.22,1,.36,1),filter 1.1s cubic-bezier(.22,1,.36,1);
}
.reveal-left.revealed{opacity:1;transform:translateX(0);filter:blur(0)}

.reveal-right{
  opacity:0;
  transform:translateX(52px);
  filter:blur(5px);
  transition:opacity 1.1s cubic-bezier(.22,1,.36,1),transform 1.1s cubic-bezier(.22,1,.36,1),filter 1.1s cubic-bezier(.22,1,.36,1);
}
.reveal-right.revealed{opacity:1;transform:translateX(0);filter:blur(0)}

.reveal-scale{
  opacity:0;
  transform:scale(.9) translateY(36px);
  filter:blur(4px);
  transition:opacity 1.2s cubic-bezier(.22,1,.36,1),transform 1.2s cubic-bezier(.22,1,.36,1),filter 1.2s cubic-bezier(.22,1,.36,1);
}
.reveal-scale.revealed{opacity:1;transform:scale(1) translateY(0);filter:blur(0)}

/* Chữ từng từ – chậm, mượt */
.fx-word{
  display:inline-block;
  opacity:0;
  transform:translateY(1.1em) rotateX(40deg);
  filter:blur(4px);
  transition:
    opacity .85s cubic-bezier(.22,1,.36,1),
    transform .85s cubic-bezier(.22,1,.36,1),
    filter .85s cubic-bezier(.22,1,.36,1);
  transform-origin:50% 100%;
  will-change:opacity,transform,filter;
}
.fx-word.show{
  opacity:1;
  transform:translateY(0) rotateX(0);
  filter:blur(0);
}

/* Chữ từng ký tự – slow elegant */
.fx-char{
  display:inline-block;
  opacity:0;
  transform:translateY(0.7em) scale(.85);
  filter:blur(3px);
  transition:
    opacity .7s cubic-bezier(.22,1,.36,1),
    transform .7s cubic-bezier(.22,1,.36,1),
    filter .7s cubic-bezier(.22,1,.36,1);
  will-change:opacity,transform,filter;
}
.fx-char.show{
  opacity:1;
  transform:translateY(0) scale(1);
  filter:blur(0);
}
.fx-space{display:inline-block;width:.28em}

/* Line underline sweep khi hiện */
.fx-line{
  position:relative;
  display:inline-block;
}
.fx-line::after{
  content:"";
  position:absolute;left:0;bottom:-2px;height:2px;width:0;
  background:linear-gradient(90deg,var(--goldf,#d9a62b),transparent);
  transition:width 1.1s cubic-bezier(.22,1,.36,1) .35s;
  border-radius:1px;
}
.fx-line.show::after{width:100%}

/* Soft glow khi chữ hiện xong */
.fx-glow.show{
  text-shadow:0 0 24px rgba(217,166,43,.25);
  transition:text-shadow 1.2s ease;
}

/* Fade clip mask từ dưới lên */
.fx-clip{
  opacity:0;
  clip-path:inset(100% 0 0 0);
  transition:opacity 1s cubic-bezier(.22,1,.36,1), clip-path 1.15s cubic-bezier(.22,1,.36,1);
}
.fx-clip.show{
  opacity:1;
  clip-path:inset(0 0 0 0);
}

@media(prefers-reduced-motion:reduce){
  .reveal,.reveal-left,.reveal-right,.reveal-scale,
  .fx-word,.fx-char,.fx-clip{
    opacity:1!important;transform:none!important;filter:none!important;
    clip-path:none!important;transition:none!important
  }
  .fx-line::after{width:100%!important;transition:none!important}
}

/* Ảnh about luôn hiện, không bị reveal ẩn */
.about img.about-photo,
.about-photo{
  opacity:1!important;
  transform:none!important;
  filter:none!important;
  visibility:visible!important;
}

/* Tăng tốc: browser bỏ qua layout section chưa vào viewport */
section{content-visibility:auto;contain-intrinsic-size:1px 800px}
.hero,header.top,section.ref{content-visibility:visible}
.carousel-slide img{
  background:var(--line);
  content-visibility:auto;
}
.about img.about-photo{
  aspect-ratio:1/1;
  object-fit:contain;
  width:min(100%,320px);
  max-width:320px;
}