:root{--purple:#532376;--deep:#301340;--cream:#f6f3ed;--ink:#27222b;--muted:#716a75;--line:#ded8df}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);background:#fff;font-family:Arial,Helvetica,sans-serif;font-size:15px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select{outline-offset:5px}button{cursor:pointer}.wrap{max-width:1240px;margin:auto;padding:0 40px}.topbar{background:var(--deep);color:#eee1f4;font-size:11px;letter-spacing:.4px}.topbar .wrap{display:flex;justify-content:space-between;padding-top:8px;padding-bottom:8px}header{background:#fff;position:sticky;top:0;z-index:10;border-bottom:1px solid #eee}.nav{height:94px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;flex-direction:column;color:var(--purple);line-height:1.2}.brand b{font-family:Georgia,serif;font-size:31px;letter-spacing:-1.7px}.brand b span{font-family:Arial;font-size:11px;vertical-align:top;letter-spacing:0}.brand small{font-size:8px;letter-spacing:2px;margin-top:8px}nav{display:flex;gap:28px;align-items:center;font-size:13px}nav a:hover,.text-link:hover{color:#9863b5}.nav-cta{border:1px solid var(--purple);padding:12px 20px;color:var(--purple)}.menu{display:none}.hero{background:var(--cream);overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;min-height:650px;gap:50px}.hero-copy{padding:74px 0 45px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--purple);margin:0 0 25px;display:flex;align-items:center;gap:10px}.eyebrow span{width:7px;height:7px;border-radius:50%;background:var(--purple)}h1,h2{font-family:Georgia,'Times New Roman',serif;font-weight:400;line-height:1.16;letter-spacing:-2px;margin:0}h1{font-size:70px;color:var(--deep)}em{font-weight:400;color:var(--purple)}.intro{max-width:430px;color:var(--muted);margin:26px 0 32px;font-size:15px;line-height:1.9}.actions{display:flex;gap:25px;align-items:center}.btn{display:inline-flex;gap:28px;align-items:center;justify-content:center;background:var(--purple);color:white;padding:16px 22px;border:1px solid var(--purple);font-size:12px;font-weight:600;transition:.2s}.btn:hover{background:var(--deep);color:white;transform:translateY(-2px)}.text-link{font-size:12px;font-weight:600;border-bottom:1px solid #bcb0c3;padding-bottom:7px;display:inline-block}.hero-note{display:flex;align-items:center;gap:14px;margin-top:45px;font-size:11px;color:var(--muted)}.hero-note p{line-height:1.6}.hero-note strong{color:var(--ink);font-weight:500}.seal{border:1px solid #c6b9cc;border-radius:50%;width:42px;height:42px;display:grid;place-items:center;font-family:Georgia;font-size:17px;color:var(--purple)}.hero-art{position:relative;align-self:end;height:590px}.arch{height:525px;width:90%;position:absolute;right:0;bottom:0;border-radius:230px 230px 0 0;background:var(--deep);padding:20px;box-shadow:18px 15px 0 #e9e3da}.arch-inner{height:100%;border:1px solid #b29a7970;border-radius:220px 220px 0 0;background:radial-gradient(ellipse at 50% 35%,#684576,var(--deep) 75%);display:flex;align-items:flex-end}.arch svg{width:100%;height:95%}.art-index{position:absolute;right:0;top:22px;font-size:9px;letter-spacing:2px;color:var(--muted)}.art-caption{position:absolute;left:-25px;bottom:65px;background:#fff;padding:24px 28px;font-family:Georgia;font-size:24px;line-height:1.4;box-shadow:0 10px 30px #160f1710;border-left:3px solid #b59b70}.art-caption i{color:var(--purple)}.service-strip{border-bottom:1px solid var(--line)}.service-strip .wrap{display:flex;align-items:center;justify-content:space-between;height:77px;font-size:10px;letter-spacing:1.5px;font-weight:600}.service-strip i{font-size:16px;color:#b8a386}.section{padding-top:92px;padding-bottom:92px}h2{font-size:47px;letter-spacing:-1.4px}h3{font-size:19px;font-weight:500;line-height:1.4}.about{display:grid;grid-template-columns:1fr 1fr;gap:100px}.about-copy{padding-top:24px;color:var(--muted)}.about-copy p:first-child{font-size:19px;color:var(--ink);line-height:1.7;margin-top:0}.about-copy .text-link{color:var(--purple);margin-top:14px}.services{background:#f8f7f9}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:45px;gap:30px}.section-heading>p{font-size:13px;color:var(--muted);margin:0 0 5px}.services-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.service-card{padding:30px;background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:.2s;display:block}.service-card:hover{background:var(--deep);color:#fff}.service-card:hover p,.service-card:hover .service-num{color:#d3c3dc}.service-card-top{display:flex;justify-content:space-between;align-items:center;color:var(--purple)}.service-num{font-family:Georgia;font-size:28px;color:#b6a4c1}.service-card-top b{font-weight:400;font-size:25px}.service-card h3{margin:24px 0 12px}.service-card p{font-size:13px;color:var(--muted);margin:0;min-height:66px}.service-bottom{margin-top:24px;font-size:10px;letter-spacing:1px}.process{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px}.process .text-link{margin-top:32px}.process ol{list-style:none;padding:0;margin:0}.process li{display:flex;gap:25px;border-top:1px solid var(--line);padding:25px 0}.process li:last-child{border-bottom:1px solid var(--line)}.process li>span{font-family:Georgia;font-size:24px;color:#a488b7}.process h3{margin:0 0 8px;font-size:18px}.process li p{font-size:13px;color:var(--muted);margin:0}.knowledge{background:var(--cream)}.filters{display:flex;gap:15px;margin-bottom:16px}.search{flex:1;display:flex;align-items:center;background:white;border:1px solid var(--line);padding:10px 20px;gap:14px}.search span{font-size:25px;color:var(--purple)}input{width:100%;border:0;background:transparent;padding:7px;color:var(--ink)}select{padding:12px 20px;border:1px solid var(--line);background:#fff;max-width:300px}.results{font-size:11px;color:var(--muted);margin-bottom:22px}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.article-card{background:#fff;overflow:hidden;border:1px solid #e4dfe6;text-align:left;padding:0;color:var(--ink);display:flex;flex-direction:column}.article-card:hover h3{color:var(--purple)}.article-card img{width:100%;aspect-ratio:1200/630;object-fit:cover;display:block}.article-body{padding:22px}.tag{font-size:9px;text-transform:uppercase;letter-spacing:1.4px;color:var(--purple);font-weight:700}.article-card h3{font-family:Georgia;font-size:21px;margin:12px 0 20px;line-height:1.45}.article-body>span:last-child{font-size:11px;color:var(--purple)}.outline{color:var(--purple);background:transparent;display:flex;margin:35px auto 0}.contact{background:var(--deep);color:white}.contact-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:100px}.contact h2{font-size:48px}.contact em{color:#d8bfdf}.contact .eyebrow{color:#cbb1d3}.contact p{color:#cbbbd1;font-size:13px;margin:24px 0}.light{background:#f5efe5;color:var(--deep);border-color:#f5efe5}.contact-info{border-left:1px solid #ffffff30;padding-left:45px}.contact-info small{display:block;font-size:9px;letter-spacing:2px;color:#c5adcf;margin-bottom:12px}.contact-info>a{display:block;font-family:Georgia;font-size:30px;line-height:1.8}.contact-info small:nth-of-type(2){margin-top:25px}.contact-info .email{font-family:Arial;font-size:18px}.contact-info p{font-size:11px}footer{padding-top:40px}.footer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:35px}.footer-top p,.footer-top>a:last-child{font-size:12px;color:var(--muted)}.footer-bottom{border-top:1px solid var(--line);padding-top:20px;padding-bottom:20px;display:flex;justify-content:space-between;font-size:10px;color:var(--muted);gap:25px}dialog{width:min(900px,92vw);max-height:90vh;border:0;padding:0;color:var(--ink)}dialog::backdrop{background:#1d0d2bba;backdrop-filter:blur(5px)}.dialog-top{position:sticky;top:0;background:white;border-bottom:1px solid var(--line);padding:16px 28px;display:flex;align-items:center;justify-content:space-between;font-size:9px;letter-spacing:1.5px;color:var(--purple)}.dialog-top button{background:transparent;border:0;font-size:22px;padding:0 8px}#reader-content{padding:35px 50px}#reader-content h2{font-size:34px;line-height:1.4;margin:14px 0 25px}#reader-content p{font-size:15px;line-height:1.9}#reader-content img{width:100%;margin-bottom:20px}.source-note{font-size:11px!important;color:var(--muted);padding:12px;background:var(--cream)}.reader-contact{background:var(--cream);padding:25px 50px;display:flex;align-items:center;justify-content:space-between;gap:20px}
@media(min-width:1450px){.wrap{max-width:1370px}.hero-grid{min-height:710px}.hero-copy{padding-top:95px}.hero-art{height:640px}.arch{height:580px}h1{font-size:82px}}
@media(max-width:1000px){.wrap{padding-left:25px;padding-right:25px}nav{gap:15px;font-size:11px}.nav-cta{padding:10px}.hero-grid{gap:25px}.hero-copy{padding-top:55px}h1{font-size:56px}.actions{align-items:flex-start;flex-direction:column;gap:18px}.hero-art{height:560px}.arch{height:470px}.about,.process,.contact-grid{gap:45px}h2{font-size:39px}.service-card{padding:24px}.contact h2{font-size:40px}.contact-info{padding-left:28px}.contact-info>a{font-size:26px}}
@media(max-width:700px){.topbar .wrap{justify-content:center}.topbar .wrap>span,.desktop{display:none}.nav{height:78px}.menu{display:block;border:0;background:none;color:var(--purple);font-size:23px}nav{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;padding:20px 25px;box-shadow:0 15px 20px #0001;flex-direction:column;align-items:stretch;font-size:14px}nav.open{display:flex}.hero-grid{display:block}.hero-copy{padding-top:45px;padding-bottom:10px}h1{font-size:54px}.intro{font-size:14px;margin-top:22px}.actions{flex-direction:row;align-items:center;gap:16px}.btn{padding:14px 16px;font-size:11px;gap:12px}.text-link{font-size:11px}.hero-note{margin-top:24px}.hero-art{height:380px;width:90%;margin-left:auto}.arch{height:360px;width:85%;padding:14px}.art-index{display:none}.art-caption{bottom:35px;left:-20px;font-size:20px;padding:18px 22px}.service-strip .wrap{overflow:auto;gap:25px;white-space:nowrap;height:65px;font-size:9px}.section{padding-top:58px;padding-bottom:58px}.about,.process,.contact-grid{grid-template-columns:1fr;gap:28px}.about-copy{padding:0}.about-copy p:first-child{font-size:17px}h2{font-size:37px}.section-heading{display:block;margin-bottom:28px}.section-heading>p{margin-top:20px}.services-grid{grid-template-columns:repeat(2,1fr)}.service-card{padding:20px}.service-card h3{font-size:17px}.service-card p{font-size:12px;min-height:95px}.service-card-top b{font-size:20px}.service-num{font-size:23px}.article-grid{grid-template-columns:1fr 1fr;gap:15px}.article-body{padding:15px}.article-card h3{font-size:17px}.filters{flex-direction:column}select{max-width:none}.contact h2{font-size:38px}.contact-info{border-left:0;border-top:1px solid #ffffff30;padding:30px 0 0}.footer-top{flex-wrap:wrap;gap:25px}.footer-top p{display:none}.footer-bottom{flex-direction:column;gap:8px}#reader-content{padding:25px}#reader-content h2{font-size:27px}.reader-contact{padding:25px;display:block}.reader-contact p{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
[hidden]{display:none!important}

/* Revision: locally bundled fonts with Vietnamese diacritics. */
@font-face{font-family:LuatCongSans;src:url('assets/LuatCongSans.woff') format('woff');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:LuatCongSerif;src:url('assets/LuatCongSerif.woff') format('woff');font-weight:400;font-style:normal;font-display:swap}
body{font-family:LuatCongSans,Arial,sans-serif}
h1,h2,.article-card h3,.art-caption,.contact-info>a{font-family:LuatCongSerif,serif}
h1,h2{line-height:1.35;letter-spacing:-1px}h1 em,h2 em{font-style:normal}
.brand-logo{display:block;width:165px;height:auto;object-fit:contain}
.services-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.service-card{padding:25px}.service-card p{min-height:92px}
@media(max-width:1000px){.services-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.brand-logo{width:145px}}
@media(max-width:700px){h1{font-size:45px}h2{font-size:33px}.contact h2{font-size:33px}.service-card{padding:20px}.service-card p{min-height:110px}.brand-logo{width:135px}}
@media(max-width:380px){.services-grid{grid-template-columns:1fr}.service-card p{min-height:0}.actions{flex-wrap:wrap}}

/* Revision: locally bundled fonts with Vietnamese diacritics. */
@font-face{font-family:LuatCongSans;src:url('assets/LuatCongSans.woff') format('woff');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:LuatCongSerif;src:url('assets/LuatCongSerif.woff') format('woff');font-weight:400;font-style:normal;font-display:swap}
body{font-family:LuatCongSans,Arial,sans-serif}
h1,h2,.article-card h3,.art-caption,.contact-info>a{font-family:LuatCongSerif,serif}
h1,h2{line-height:1.35;letter-spacing:-1px}h1 em,h2 em{font-style:normal}
.brand-logo{display:block;width:165px;height:auto;object-fit:contain}
.services-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.service-card{padding:25px}.service-card p{min-height:92px}
@media(max-width:1000px){.services-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.brand-logo{width:145px}}
@media(max-width:700px){h1{font-size:45px}h2{font-size:33px}.contact h2{font-size:33px}.service-card{padding:20px}.service-card p{min-height:110px}.brand-logo{width:135px}}
@media(max-width:380px){.services-grid{grid-template-columns:1fr}.service-card p{min-height:0}.actions{flex-wrap:wrap}}

/* Revised introduction and contact channels */
.hero-copy h1{font-size:clamp(35px,4.3vw,59px);line-height:1.35}.hero-copy .intro{max-width:490px;margin-top:22px}.hero-copy .intro p{margin:0 0 15px}
.contact-buttons{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:15px}.channel{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid #ffffff70;border-radius:6px;padding:10px 13px;color:#fff;background:transparent;font:inherit;font-size:12px;text-decoration:none;cursor:pointer}.channel svg{width:22px;height:22px;flex:none}.channel:hover{background:#ffffff20}.channel.zalo{background:#0068ff;border-color:#0068ff}.channel.facebook{background:#1877f2;border-color:#1877f2}.channel.phone{background:#f5efe5;color:var(--deep);border-color:#f5efe5}.contact-info .contact-status{font-size:12px;color:#f5efe5;margin:0 0 20px}.contact-status:empty{display:none}
@media(max-width:700px){.hero-copy h1{font-size:39px}.hero-copy{padding-bottom:30px}.hero-grid{min-height:0}.contact-buttons{gap:8px}}

/* V4: compact hero and persistent contact controls. */
.hero-copy{padding-top:60px;padding-bottom:40px}.hero-copy .intro{max-width:450px;line-height:1.8;margin:22px 0 28px}.hero-grid{min-height:570px}.hero-art{height:540px}.arch{height:500px}
.floating-contact{position:fixed;left:max(16px,env(safe-area-inset-left));bottom:max(16px,env(safe-area-inset-bottom));z-index:40;display:flex;flex-direction:column;align-items:flex-start;gap:9px;max-width:calc(100vw - 32px)}
.floating-contact .contact-buttons{display:flex;flex-direction:column;align-items:flex-start;gap:8px;margin:0}.floating-contact .channel{min-width:126px;min-height:46px;justify-content:flex-start;border-radius:24px;box-shadow:0 4px 18px #20102925;font-size:12px;padding:10px 16px}.floating-contact .phone{background:#397849;border-color:#397849;color:#fff}.contact-toggle{display:flex;align-items:center;gap:8px;min-height:44px;border:1px solid #ded8df;background:#fff;color:var(--purple);padding:8px 14px;border-radius:25px;box-shadow:0 4px 18px #20102920;font-size:11px}.toggle-symbol{font-size:23px;line-height:1}.contact-toggle:hover{background:var(--cream)}.floating-contact .contact-status{max-width:260px;background:white;color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:12px;font-size:12px;box-shadow:0 4px 20px #20102925;margin:0}.floating-contact .contact-status:empty{display:none}
footer{padding-bottom:70px}
@media(max-width:700px){
 .topbar .wrap{padding-top:5px;padding-bottom:5px;font-size:10px;line-height:20px}.nav{height:66px}nav{top:66px}.brand-logo{width:130px}
 /* svh uses the viewport with browser controls visible; hero + header fit the first screen. */
 .hero-grid{height:calc(100svh - 97px);min-height:0;display:grid;grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr);gap:10px;padding:20px 24px 0;overflow:hidden}
 .hero-copy{padding:0}.hero-copy .eyebrow{font-size:9px;letter-spacing:1.5px;margin-bottom:12px}.hero-copy h1{font-size:clamp(27px,7.6vw,39px);line-height:1.3;letter-spacing:-.8px}.hero-copy .intro{font-size:12px;line-height:1.65;margin:12px 0 15px;max-width:420px}.hero-copy>.btn{padding:11px 16px;min-height:42px;font-size:11px}
 .hero-art{align-self:stretch;justify-self:end;height:100%;min-height:0;width:78%;margin:0}.arch{height:100%;width:90%;padding:10px;border-radius:160px 160px 0 0;box-shadow:10px 8px 0 #e9e3da}.arch-inner{border-radius:150px 150px 0 0}.arch svg{height:95%;width:100%}.art-caption{font-size:clamp(13px,3.8vw,18px);padding:10px 14px;bottom:22px;left:-25px;line-height:1.4}.art-index{display:none}
 .floating-contact{left:max(10px,env(safe-area-inset-left));bottom:max(10px,env(safe-area-inset-bottom));gap:7px}.floating-contact .channel{min-width:0;width:44px;height:44px;min-height:44px;padding:10px;justify-content:center}.floating-contact .channel>span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.floating-contact .channel svg{width:24px;height:24px}.contact-toggle{min-height:44px;padding:8px 11px}.toggle-label{font-size:10px}.floating-contact .contact-status{max-width:230px}
}
@media(max-width:700px) and (max-height:650px){.hero-grid{padding-top:12px;gap:7px}.hero-copy .eyebrow{margin-bottom:6px}.hero-copy h1{font-size:28px}.hero-copy .intro{margin:8px 0 10px;font-size:11px}.hero-copy>.btn{min-height:38px;padding:8px 13px}.art-caption{font-size:13px;bottom:12px}}
/* For very short landscape viewports or large accessibility text, allow scrolling instead of clipping content. */
@media(max-width:700px) and (max-height:430px){.hero-grid{height:auto;min-height:calc(100svh - 97px);overflow:visible;grid-template-columns:1.2fr 1fr;grid-template-rows:auto;padding-bottom:15px;align-items:center}.hero-art{min-height:200px;width:100%}.art-caption{display:none}}