:root{
  --bg:#ffffff; --alt:#f3f6fa; --card:#ffffff; --raise:#f7f9fc;
  --ink:#121820; --muted:#5f6b7d; --line:#dde4ed;
  --navy:#1d5aa6; --deep:#0f3d73; --soft:#e8f0fa; --gold:#ffc72c;
  --band:#0f3d73; --bandrgb:15,61,115;
  --good:#1b7a4b; --warn:#9a5b00; --warnbg:#fff4de;
  --ui:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;
  --maxw:1080px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#12151a; --alt:#171b22; --card:#1b1f26; --raise:#222731;
  --ink:#eaecef; --muted:#9aa3b0; --line:#2f353f;
  --navy:#6fa5e8; --deep:#9cc6f5; --soft:#1a2738;
  --band:#0d2744; --bandrgb:13,39,68; --good:#5fc595;
  --warn:#ffce7a; --warnbg:#332a18; color-scheme:dark;
}}
:root[data-theme="dark"]{
  --bg:#12151a; --alt:#171b22; --card:#1b1f26; --raise:#222731;
  --ink:#eaecef; --muted:#9aa3b0; --line:#2f353f;
  --navy:#6fa5e8; --deep:#9cc6f5; --soft:#1a2738;
  --band:#0d2744; --bandrgb:13,39,68; --good:#5fc595;
  --warn:#ffce7a; --warnbg:#332a18; color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:68px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--ui);line-height:1.6;-webkit-text-size-adjust:100%}
h1,h2,h3{margin:0;line-height:1.15;text-wrap:balance}
p{margin:0}
a{color:var(--navy)}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--navy);outline-offset:2px;border-radius:6px}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}
body[data-lang="vi"] .en{display:none}
body[data-lang="en"] .vi{display:none}

.wrap{max-width:var(--maxw);margin:0 auto;
  padding-left:max(18px,env(safe-area-inset-left,0px));
  padding-right:max(18px,env(safe-area-inset-right,0px))}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:var(--band);border-bottom:1px solid rgba(255,255,255,.1)}
.nav .wrap{display:flex;align-items:center;gap:14px;height:62px}
.lg{display:flex;align-items:center;gap:9px;flex:1 1 auto;min-width:0;text-decoration:none}
.lg span{min-width:0;overflow:hidden}
.lg b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lg img{height:32px;background:#fff;border-radius:7px;padding:4px 6px;display:block}
.lg b{color:#fff;font-size:12px;font-weight:800;letter-spacing:.3px;line-height:1.15;display:block}
.lg i{color:#9dc2ea;font-size:9.5px;font-style:normal;display:block}
.nv{display:flex;gap:4px;margin-left:auto;align-items:center}
.nv a{color:#c6ddf5;text-decoration:none;font-size:13px;font-weight:600;padding:7px 11px;border-radius:8px;white-space:nowrap}
.nv a:hover{background:rgba(255,255,255,.12);color:#fff}
@media(max-width:860px){.nv{display:none}.nv+.lang{margin-left:auto}}
.lang{display:flex;border:1px solid rgba(255,255,255,.3);border-radius:999px;overflow:hidden;flex:none;margin-left:auto}
.nv+.lang{margin-left:6px}
.lang button{border:0;background:transparent;color:#9dc2ea;font-size:11.5px;font-weight:700;padding:6px 10px;cursor:pointer;letter-spacing:.4px;display:flex;align-items:center;gap:6px}
.fl{width:17px;height:11px;display:block;flex:none;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.22)}
.lang button[aria-pressed="true"]{background:#fff;color:#0f3d73}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--band);color:#fff;padding:60px 0 64px;overflow:hidden;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;background:url(img/hero.jpg) center 62%/cover no-repeat}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(105deg,rgba(var(--bandrgb),.97) 0%,rgba(var(--bandrgb),.93) 42%,rgba(var(--bandrgb),.74) 100%)}
.gh{font-size:12px;font-weight:800;letter-spacing:.9px;text-transform:uppercase;color:var(--muted);margin:30px 0 12px}
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.gal figure{margin:0;position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:var(--raise)}
.gal img{display:block;width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.gal figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 12px 11px;font-size:12px;font-weight:600;
  color:#fff;line-height:1.35;background:linear-gradient(to top,rgba(0,0,0,.80) 10%,rgba(0,0,0,.45) 55%,rgba(0,0,0,0))}
.gal.stamp img{aspect-ratio:3/4;object-position:center bottom}
.gal .wide{grid-column:span 2}
.gal .wide img{aspect-ratio:2.72/1}
@media(max-width:760px){.gal{grid-template-columns:repeat(2,1fr);gap:9px}.gal figcaption{font-size:11px;padding:22px 9px 9px}.gal .wide img{aspect-ratio:16/9}}
.hero h1{font-size:clamp(28px,5.4vw,46px);font-weight:800;max-width:17ch}
.hero .sub{color:#a8cbee;font-size:clamp(15px,2.3vw,18px);margin-top:16px;max-width:52ch}
.cta{display:flex;gap:11px;flex-wrap:wrap;margin-top:26px}
.b1,.b2{text-decoration:none;font-size:15px;font-weight:700;padding:13px 22px;border-radius:11px;display:inline-block}
.b1{background:var(--gold);color:#1a1200}
.b2{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.3)}
.b1:hover{filter:brightness(1.07)} .b2:hover{background:rgba(255,255,255,.22)}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:40px;padding-top:26px;border-top:1px solid rgba(255,255,255,.17)}
.facts div b{display:block;font-size:21px;font-weight:800;color:var(--gold)}
.facts div span{font-size:12px;color:#a8cbee;line-height:1.45;display:block;margin-top:2px}
@media(max-width:620px){.facts{grid-template-columns:1fr 1fr;gap:18px}}

/* ---------- sections ---------- */
section{padding:56px 0}
section.alt{background:var(--alt)}
.kick{font-size:11px;font-weight:800;letter-spacing:1.1px;text-transform:uppercase;color:var(--navy)}
h2{font-size:clamp(22px,3.6vw,31px);font-weight:800;margin-top:9px}
.lead{color:var(--muted);font-size:15.5px;margin-top:12px;max-width:62ch}

.grid{display:grid;gap:16px;margin-top:30px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:860px){.g3{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.g3,.g2{grid-template-columns:1fr}}

.svc{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:0;overflow:hidden;display:flex;flex-direction:column}
.svc>img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--raise)}
.svc .bd{padding:17px 18px 19px;display:flex;flex-direction:column;flex:1}
.svc .hd{display:flex;align-items:center;gap:11px;margin-bottom:9px}
.svc .ic{width:36px;height:36px;flex:none;border-radius:10px;background:var(--soft);display:flex;align-items:center;justify-content:center}
.svc .ic svg{width:20px;height:20px;stroke:var(--navy);fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.svc h3{font-size:16.5px;font-weight:700}
.svc p{font-size:14px;color:var(--muted);margin-top:7px}
.svc .tag{display:inline-block;align-self:flex-start;margin-top:auto;font-size:10.5px;font-weight:700;letter-spacing:.4px;color:var(--good);background:rgba(27,122,75,.1);padding:3px 9px;border-radius:999px;margin-top:11px}

/* ---------- rate calculator ---------- */
.calc{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;margin-top:28px}
.ttl{font-size:11px;font-weight:800;letter-spacing:.8px;text-transform:uppercase;color:var(--navy);margin-bottom:12px}
label.f{display:flex;flex-direction:column;gap:5px;min-width:0}
label.f>span{font-size:11.5px;font-weight:600;color:var(--muted)}
input{font:inherit;font-size:16px;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:var(--raise);color:var(--ink);width:100%;min-width:0}
textarea{font:inherit;font-size:15px;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:var(--raise);color:var(--ink);width:100%;resize:vertical}
.g{display:grid;gap:11px}
.g3c{grid-template-columns:repeat(3,minmax(0,1fr))}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.seg label{position:relative;display:block}
.seg input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}
.seg label>span{display:block;height:100%;padding:14px 10px;border:1px solid var(--line);border-radius:11px;background:var(--raise);text-align:center;cursor:pointer}
.seg b span,.seg i span{display:inline;padding:0;border:0;background:none;border-radius:0}
.seg b{display:block;font-size:14.5px;font-weight:700}
.seg i{display:block;font-style:normal;font-size:11px;color:var(--muted);margin-top:2px;white-space:nowrap}
.seg label>input:checked+span{background:var(--soft);border-color:var(--navy)}
.seg label>input:checked+span b{color:var(--deep)}
.seg label>input:focus-visible+span{outline:2px solid var(--navy);outline-offset:2px}
.item{border:1px solid var(--line);border-radius:12px;padding:12px;background:var(--raise);display:grid;gap:10px;margin-bottom:11px}
.ihd{display:flex;align-items:center;gap:8px}
.ihd .n{font-size:11px;font-weight:800;color:var(--navy)}
.ihd .ch{margin-left:auto;font-size:11.5px;font-weight:700;color:var(--good);font-variant-numeric:tabular-nums}
.ihd button{border:0;background:transparent;color:var(--muted);font-size:19px;line-height:1;cursor:pointer;padding:2px 7px;border-radius:7px}
.add{border:1px dashed var(--line);background:transparent;color:var(--navy);font-size:14px;font-weight:650;padding:11px;border-radius:11px;cursor:pointer;width:100%}
.add:hover{background:var(--soft)}
.wq{display:flex;gap:6px;flex-wrap:wrap}
.wq button{border:1px solid var(--line);background:var(--card);color:var(--muted);font-size:11.5px;font-weight:600;padding:5px 10px;border-radius:999px;cursor:pointer}
.wq button:hover{border-color:var(--navy);color:var(--navy)}
.bulky{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);cursor:pointer;user-select:none}
.bulky input{width:17px;height:17px;flex:none;padding:0;accent-color:var(--navy)}
.dims{display:none}.dims.on{display:grid}
.dimnote{font-size:11px;color:var(--muted);line-height:1.5}
.quote{background:var(--band);border-radius:14px;padding:18px;margin-top:14px;color:#fff}
.qr{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:7px 0;font-size:14px}
.qr .l{color:#a8cbee;min-width:0}
.qr .l small{display:block;font-size:10.5px;color:#7ba7d6;margin-top:1px}
.qr .v{font-weight:700;font-variant-numeric:tabular-nums;white-space:nowrap}
.qline{height:1px;background:rgba(255,255,255,.18);margin:7px 0}
.qtot{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding-top:9px}
.qtot .l{font-size:13px;font-weight:700;letter-spacing:.5px;color:var(--gold)}
.qtot .v{font-size:26px;font-weight:800;font-variant-numeric:tabular-nums}
.qvnd{text-align:right;font-size:12.5px;color:#a8cbee;margin-top:3px;font-variant-numeric:tabular-nums}
.qnote{font-size:11px;color:#8fb6e0;line-height:1.5;margin-top:12px}
.qask{background:rgba(255,255,255,.10);border-radius:11px;padding:13px;margin-top:12px;font-size:13px;line-height:1.55;color:#dce9f7}
.qask b{color:var(--gold)}
.flag{background:var(--warnbg);color:var(--warn);border-radius:10px;padding:10px 12px;font-size:12.5px;line-height:1.5;margin-top:11px;font-weight:600}
.rules{font-size:13px;line-height:1.7;color:var(--muted);margin-top:18px;padding-left:0}
.rules li{margin-left:17px;margin-bottom:3px}
.rules b{color:var(--ink)}

.btn{width:100%;border:0;border-radius:12px;padding:14px;font-size:15px;font-weight:700;cursor:pointer;margin-top:10px;text-align:center;text-decoration:none;display:block}
.btn.p{background:var(--navy);color:#fff}
.btn.p:hover{background:var(--band)}
.btn.w{background:#25D366;color:#06331a}
.btn.t{background:#2AABEE;color:#042437}
.btn.s{background:var(--card);color:var(--navy);border:1px solid var(--line)}
.out{width:100%;margin-top:11px;font-size:12.5px;line-height:1.6;font-family:ui-monospace,Menlo,Consolas,monospace;min-height:150px;white-space:pre;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:var(--raise);color:var(--ink);resize:vertical}
.msg{font-size:13px;font-weight:600;padding:11px 13px;border-radius:10px;margin-top:10px;line-height:1.5;background:var(--soft);color:var(--deep)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:520px){.two{grid-template-columns:1fr}}

/* ---------- steps ---------- */
.steps{counter-reset:s;margin-top:30px;display:grid;gap:14px}
.step{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:17px 19px 17px 58px;position:relative}
.step::before{counter-increment:s;content:counter(s);position:absolute;left:17px;top:17px;width:28px;height:28px;border-radius:50%;background:var(--band);color:#fff;font-size:13.5px;font-weight:800;display:flex;align-items:center;justify-content:center}
.step h3{font-size:15.5px;font-weight:700}
.step p{font-size:14px;color:var(--muted);margin-top:5px}

/* ---------- contact ---------- */
.ct{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:28px;align-items:start}
.chd{font-size:11px;font-weight:800;letter-spacing:.9px;text-transform:uppercase;color:var(--navy);padding-bottom:11px;margin-bottom:4px;border-bottom:2px solid var(--soft)}
.qrbox{margin-top:20px;display:flex;align-items:center;justify-content:center}
@media(max-width:760px){.ct{grid-template-columns:1fr}}
.cbox{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px}
.crow{display:flex;gap:12px;padding:9px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.crow:last-child{border:0}
.crow .t{font-size:11.5px;color:var(--muted);width:92px;flex:none;padding-top:2px;font-weight:600}
.crow .v{font-weight:600;font-size:14.5px;display:flex;flex-direction:column;align-items:flex-start;min-width:0}
.crow .v small{display:block;font-weight:400;color:var(--muted);font-size:12.5px;margin-top:2px}
.ext{color:var(--navy);text-decoration:none;font-weight:600;font-size:14px;word-break:break-all}
.ext:hover{text-decoration:underline}
.mapwrap{margin-top:20px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--raise)}
.mapwrap iframe{display:block;width:100%;height:340px;border:0}
.mapcap{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 16px;border-top:1px solid var(--line);background:var(--card)}
.mapcap b{font-size:14px}
.mapcap small{display:block;font-weight:400;color:var(--muted);font-size:12.5px;margin-top:2px}
.mapcap .dir{margin:0 0 0 auto}
@media(max-width:640px){.mapwrap iframe{height:260px}.mapcap .dir{margin:4px 0 0}}
.dir{display:inline-block;margin-top:7px;align-self:flex-start;font-size:12.5px;font-weight:600;color:var(--navy);text-decoration:none;border:1px solid var(--line);border-radius:8px;padding:5px 10px}
.dir:hover{background:var(--soft);border-color:var(--navy)}
.qrs{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.qrs figure{margin:0;text-align:center}
.qrs img{width:124px;height:124px;display:block;border-radius:10px;border:1px solid var(--line);background:#fff}
.qrs figcaption{font-size:10.5px;font-weight:700;color:var(--muted);margin-top:6px;letter-spacing:.3px}
footer{background:var(--band);color:#8fb6e0;padding:30px 0;font-size:12.5px;line-height:1.7}
.chat{position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px;
  right:max(16px,env(safe-area-inset-right,0px));bottom:max(16px,env(safe-area-inset-bottom,0px))}
.chat a{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 14px rgba(0,0,0,.28);text-decoration:none;position:relative;transition:transform .15s}
.chat a:hover{transform:scale(1.07)}
.chat svg{width:25px;height:25px;stroke:#fff;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.chat .zl{background:#0068FF}.chat .tg{background:#2AABEE}.chat .wa{background:#25D366}
.chat b{position:absolute;right:62px;top:50%;transform:translateY(-50%);background:var(--ink);color:var(--bg);
  font-size:12px;font-weight:700;padding:6px 11px;border-radius:8px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .15s}
.chat a:hover b{opacity:1}
@media(max-width:640px){.chat a{width:48px;height:48px}.chat svg{width:23px;height:23px}.chat b{display:none}}
footer{padding-bottom:90px}

footer b{color:#fff;display:block;font-size:13.5px;margin-bottom:5px}
.nap{color:#a8cbee;font-size:12.5px;margin-top:3px}
.flinks{display:flex;gap:16px;flex-wrap:wrap;margin:9px 0 12px}
.flinks a{color:#c6ddf5;text-decoration:none;font-weight:600;font-size:13px}
.flinks a:hover{color:#fff;text-decoration:underline}
@media(max-width:640px){
  .wq button{font-size:13.5px;padding:9px 14px}
  .bulky{padding:6px 0;font-size:13.5px}
  .bulky input{width:21px;height:21px}
  .add{padding:14px;font-size:15px}
  .seg b{font-size:16px}
  .seg i{font-size:12px;white-space:normal}
  label.f>span{font-size:12.5px}
  .lg b{font-size:11px}
  .lang button{padding:8px 13px;font-size:12.5px}
  section{padding:44px 0}
}