/* Layout: white header with blue logo → photo hero with teal/yellow waves (as on the profile cover) → stats → services → tours → events gallery → why us → contact → teal footer */
:root{
  --teal:#00a7af; --teal-d:#00828a; --teal-dd:#05545a; --yellow:#ffb51e; --yellow-soft:#fff3d6;
  --bg:#ffffff; --bg-2:#f2f8f8; --surface:#ffffff; --fg:#17323a; --muted:#587078; --line:#dbe8ea;
  --head:"Quicksand","Be Vietnam Pro",system-ui,sans-serif;
  --body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0b1d21; --bg-2:#10272c; --surface:#132e34; --fg:#e7f3f4; --muted:#9dbcc1; --line:#21434a; --yellow-soft:#3b2f12; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0b1d21; --bg-2:#10272c; --surface:#132e34; --fg:#e7f3f4; --muted:#9dbcc1; --line:#21434a; --yellow-soft:#3b2f12; color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:var(--body);font-size:16px;line-height:1.65}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--teal-d)}
a{color:inherit}
img{display:block;max-width:100%}
h1,h2,h3{font-family:var(--head);line-height:1.2;text-wrap:balance;margin:0;font-weight:700}
.wrap{max-width:1200px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:var(--teal)}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--yellow)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border:0;border-radius:999px;padding:.8rem 1.5rem;font:700 .95rem var(--body);cursor:pointer;text-decoration:none;transition:transform .15s,background .15s}
.btn:hover{transform:translateY(-1px)}
.btn-yellow{background:var(--yellow);color:#2a1d00}
.btn-teal{background:var(--teal);color:#fff}
.btn-teal:hover{background:var(--teal-d)}
.btn-line{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.7)}
:focus-visible{outline:3px solid var(--yellow);outline-offset:2px}

/* Top bar & header */
.topbar{background:var(--teal-d);color:#e9fbfc;font-size:.82rem}
.topbar .wrap{display:flex;flex-wrap:wrap;gap:.3rem 1.5rem;justify-content:space-between;padding-block:.45rem}
.topbar b{color:#fff}
header.site{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:#fff;box-shadow:0 2px 14px rgba(0,80,86,.08)}
header.site .wrap{display:flex;align-items:center;gap:1.4rem;padding-block:.55rem}
.logo img{height:58px;width:auto}
nav.main{margin-left:auto;display:flex;gap:1.5rem;font-weight:600;font-size:.95rem;color:#17323a}
nav.main a{text-decoration:none;padding:.35rem 0;border-bottom:2.5px solid transparent}
nav.main a:hover{color:var(--teal);border-color:var(--yellow)}
.menu-btn{display:none;margin-left:auto;background:var(--teal);color:#fff;border:0;border-radius:10px;padding:.5rem .85rem;font:700 .9rem var(--body)}
@media (max-width:960px){
  nav.main{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;flex-direction:column;gap:0;padding:0 max(16px,env(safe-area-inset-right,0px)) .6rem max(16px,env(safe-area-inset-left,0px));box-shadow:0 10px 20px rgba(0,0,0,.08)}
  nav.main.open{display:flex}
  nav.main a{padding:.75rem 0;border-bottom:1px solid #e4eff0}
  .menu-btn{display:block}
  header.site .call{display:none}
  .logo img{height:48px}
}

/* Hero */
.hero{position:relative;color:#fff;overflow:hidden;background:var(--teal-dd)}
.hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(0,74,80,.88) 0%,rgba(0,110,118,.6) 45%,rgba(0,0,0,.05) 85%)}
.hero .wrap{position:relative;z-index:2;padding-block:5.5rem 8rem}
.hero .tag{font-family:var(--head);font-size:1.15rem;color:var(--yellow);font-weight:700}
.hero h1{font-size:clamp(2.1rem,5vw,3.8rem);margin:.5rem 0 1rem;max-width:16ch}
.hero h1 span{color:var(--yellow)}
.hero p{max-width:54ch;font-size:1.05rem;color:#e3f6f7;margin:0}
.hero .actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}
.wave{position:absolute;left:0;right:0;bottom:-1px;z-index:3;width:100%;height:auto}
.wave .w1{fill:var(--yellow)} .wave .w2{fill:var(--teal)} .wave .w3{fill:var(--bg)}

/* Stats */
.stats{position:relative;z-index:4;margin-top:-1px;background:var(--bg)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;padding-block:1rem 2.5rem}
.stat{text-align:center;padding:1.1rem .5rem;border-radius:16px;background:var(--bg-2)}
.stat b{display:block;font-family:var(--head);font-size:clamp(1.7rem,3vw,2.3rem);color:var(--teal);font-variant-numeric:tabular-nums;line-height:1.1}
.stat span{font-size:.88rem;color:var(--muted)}
@media (max-width:720px){.stats .wrap{grid-template-columns:1fr 1fr}}

section.block{padding-block:4.5rem}
section.alt{background:var(--bg-2)}
.sec-head{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:1rem 2rem;margin-bottom:2rem}
.sec-head h2{font-size:clamp(1.7rem,3.2vw,2.5rem);margin-top:.4rem}
.sec-head h2 em{font-style:normal;color:var(--teal)}
.sec-head p{color:var(--muted);max-width:54ch;margin:0}

/* About */
.about{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.about .pics{position:relative;padding:0 0 2.5rem 2.5rem}
.about .pics img{border-radius:20px;width:100%;aspect-ratio:4/3;object-fit:cover}
.about .pics img.small{position:absolute;left:0;bottom:0;width:48%;border:6px solid var(--bg);aspect-ratio:1}
.about .pics::before{content:"";position:absolute;right:-14px;top:-14px;width:120px;height:120px;border-radius:24px;background:var(--yellow);z-index:-1}
.about p{color:var(--muted)}
.motto{display:inline-block;margin-top:.5rem;padding:.7rem 1.1rem;border-left:4px solid var(--yellow);background:var(--yellow-soft);font-family:var(--head);font-weight:700;font-size:1.1rem;color:var(--fg);border-radius:0 12px 12px 0}
.values{display:grid;grid-template-columns:1fr 1fr;gap:.6rem 1.2rem;margin:1.3rem 0 0;padding:0;list-style:none}
.values li{display:flex;gap:.55rem;align-items:flex-start;font-weight:600;font-size:.95rem}
.values li::before{content:"";flex:none;margin-top:.45rem;width:9px;height:9px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(0,167,175,.18)}
@media (max-width:860px){.about{grid-template-columns:1fr}.values{grid-template-columns:1fr}}

/* Services */
.svc{display:grid;grid-template-columns:repeat(4,1fr);gap:1.3rem}
.svc article{background:var(--surface);border-radius:18px;overflow:hidden;border:1px solid var(--line);display:flex;flex-direction:column}
.svc article img{aspect-ratio:4/3;object-fit:cover;width:100%}
.svc .b{padding:1.1rem 1.2rem 1.3rem;display:grid;gap:.4rem}
.svc h3{font-size:1.12rem;color:var(--teal-d)}
:root[data-theme="dark"] .svc h3{color:var(--teal)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .svc h3{color:var(--teal)}}
.svc p{margin:0;color:var(--muted);font-size:.92rem}
@media (max-width:980px){.svc{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.svc{grid-template-columns:1fr}}

/* Tours */
.tabs{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1.6rem}
.tabs button{border:1.5px solid var(--line);background:var(--surface);color:var(--fg);border-radius:999px;padding:.5rem 1.1rem;font:600 .9rem var(--body);cursor:pointer}
.tabs button[aria-selected="true"]{background:var(--teal);border-color:var(--teal);color:#fff}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:1.4rem}
.tour{background:var(--surface);border-radius:18px;overflow:hidden;box-shadow:0 6px 22px rgba(0,80,86,.08);display:flex;flex-direction:column;border:1px solid var(--line)}
.tour .pic{position:relative}
.tour .pic img{aspect-ratio:16/10;object-fit:cover;width:100%}
.tour .pic i{position:absolute;top:.8rem;left:.8rem;font-style:normal;font-size:.74rem;font-weight:700;background:var(--yellow);color:#2a1d00;padding:.2rem .7rem;border-radius:999px}
.tour .b{padding:1rem 1.15rem 1.2rem;display:flex;flex-direction:column;gap:.5rem;flex:1}
.tour h3{font-size:1.1rem}
.tour p{margin:0;color:var(--muted);font-size:.9rem}
.tour .f{margin-top:auto;padding-top:.8rem;border-top:1px dashed var(--line);display:flex;justify-content:space-between;align-items:center;gap:.5rem;font-size:.88rem}
.tour .f b{color:var(--teal)}
.tour .f a{font-weight:700;color:var(--teal);text-decoration:none}

/* Events band */
.events{background:linear-gradient(160deg,var(--teal-d),var(--teal-dd));color:#fff;position:relative;overflow:hidden}
.events .eyebrow{color:var(--yellow)}
.events .sec-head p{color:#cdeff1}
.mosaic{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:190px;gap:12px}
.mosaic figure{margin:0;position:relative;border-radius:16px;overflow:hidden}
.mosaic figure img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.mosaic figure:hover img{transform:scale(1.05)}
.mosaic figcaption{position:absolute;left:0;right:0;bottom:0;padding:1.6rem .9rem .7rem;background:linear-gradient(transparent,rgba(0,40,44,.85));font-family:var(--head);font-weight:700}
.mosaic .big{grid-column:span 2;grid-row:span 2}
.mosaic .wide{grid-column:span 2}
@media (max-width:820px){.mosaic{grid-template-columns:1fr 1fr;grid-auto-rows:150px}}

/* Why */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:1.3rem}
.why div{padding:1.4rem;border-radius:18px;background:var(--surface);border:1px solid var(--line)}
.why svg{width:40px;height:40px;color:var(--teal);margin-bottom:.6rem}
.why h3{font-size:1.1rem;margin-bottom:.35rem}
.why p{margin:0;color:var(--muted);font-size:.92rem}
@media (max-width:900px){.why{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.why{grid-template-columns:1fr}}
.airlines{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.6rem}
.airlines span{padding:.45rem .95rem;border-radius:999px;background:var(--yellow-soft);font-weight:600;font-size:.88rem}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1.3rem;counter-reset:s;padding:0;margin:0}
.steps li{list-style:none;counter-increment:s;padding-top:3.3rem;position:relative}
.steps li::before{content:counter(s);position:absolute;top:0;left:0;width:2.6rem;height:2.6rem;border-radius:50%;background:var(--teal);color:#fff;font:700 1.1rem var(--head);display:grid;place-items:center;box-shadow:0 0 0 5px rgba(255,181,30,.35)}
.steps b{display:block;font-family:var(--head);font-size:1.05rem}
.steps span{color:var(--muted);font-size:.92rem}
@media (max-width:780px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:440px){.steps{grid-template-columns:1fr}}

/* Contact */
.contact{display:grid;grid-template-columns:.95fr 1.05fr;gap:2.5rem;align-items:start}
.cinfo{display:grid;gap:.9rem;margin-top:1.4rem}
.cinfo div{display:flex;gap:.9rem;align-items:flex-start;padding:1rem 1.1rem;background:var(--surface);border-radius:14px;border:1px solid var(--line)}
.cinfo svg{flex:none;width:38px;height:38px;padding:8px;border-radius:10px;background:var(--teal);color:#fff}
.cinfo small{display:block;font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:700}
.cinfo b{font-size:1.02rem;user-select:all}
form.cf{background:var(--surface);border-radius:20px;padding:1.7rem;display:grid;gap:.95rem;box-shadow:0 12px 36px rgba(0,80,86,.12);border-top:5px solid var(--yellow)}
form.cf h3{font-size:1.35rem}
form.cf .row{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
form.cf label{display:grid;gap:.3rem;font-size:.82rem;font-weight:600;color:var(--muted)}
form.cf input,form.cf select,form.cf textarea{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:.7rem .85rem;font:inherit;font-size:.95rem;background:var(--bg);color:var(--fg)}
form.cf input:focus,form.cf select:focus,form.cf textarea:focus{border-color:var(--teal);outline:none}
.ok{background:var(--yellow-soft);border-radius:12px;padding:.8rem 1rem;font-size:.92rem}
@media (max-width:860px){.contact{grid-template-columns:1fr}}
@media (max-width:480px){form.cf .row{grid-template-columns:1fr}}

footer{background:var(--teal);color:#eafcfd;font-size:.92rem;position:relative}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem;padding-block:3rem 1.4rem}
footer .flogo{height:70px;width:auto;margin-bottom:.8rem}
footer h4{color:var(--yellow);margin:0 0 .7rem;font-family:var(--head);font-size:1.05rem}
footer ul{list-style:none;padding:0;margin:0;display:grid;gap:.4rem}
footer a{text-decoration:none}
footer a:hover{color:var(--yellow)}
footer p{margin:0}
footer .copy{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.25);padding-top:1rem;font-size:.82rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem}
@media (max-width:780px){footer .wrap{grid-template-columns:1fr}}
.float-call{position:fixed;right:calc(16px + env(safe-area-inset-right,0px));bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:30;box-shadow:0 8px 24px rgba(0,0,0,.25)}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Ưu đãi */
.nav-hot{color:var(--teal-d)!important;font-weight:700;position:relative}
.nav-hot::after{content:"HOT";position:absolute;top:-.55rem;right:-1.6rem;font-size:.58rem;font-weight:800;background:#e8432e;color:#fff;padding:.05rem .3rem;border-radius:4px;letter-spacing:.04em}
@media (max-width:960px){.nav-hot::after{position:static;margin-left:.4rem}}
.promo-band{background:var(--yellow-soft)}
.promo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:1.4rem}
.promo{background:var(--surface);border-radius:18px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 8px 26px rgba(0,80,86,.10);border:1px solid var(--line)}
.promo-pic{position:relative}
.promo-pic img{width:100%;aspect-ratio:16/9;object-fit:cover}
.promo-tag{position:absolute;top:.8rem;left:.8rem;background:#e8432e;color:#fff;font-weight:700;font-size:.78rem;padding:.25rem .75rem;border-radius:999px}
.promo-body{padding:1.1rem 1.2rem 1.3rem;display:flex;flex-direction:column;gap:.55rem;flex:1}
.promo-time{align-self:flex-start;font-size:.78rem;font-weight:700;color:var(--teal-d);background:rgba(0,167,175,.12);padding:.2rem .65rem;border-radius:999px}
.promo h3{font-size:1.2rem}
.promo p{margin:0;color:var(--muted);font-size:.93rem}
.promo ul{margin:0;padding-left:1.1rem;font-size:.9rem;display:grid;gap:.2rem}
.promo-price{display:flex;gap:.6rem;align-items:baseline}
.promo-price s{color:var(--muted);font-size:.9rem}
.promo-price b{font-family:var(--head);font-size:1.4rem;color:#e8432e}
.promo .btn{margin-top:auto;align-self:flex-start}
.promo-empty{grid-column:1/-1;color:var(--muted);text-align:center;padding:2rem 1rem;background:var(--surface);border-radius:16px;margin:0}
.page-hero{background:linear-gradient(120deg,var(--teal-d),var(--teal));color:#fff;position:relative;overflow:hidden}
.page-hero .wrap{padding-block:3.5rem 4.5rem}
.page-hero h1{font-size:clamp(2rem,4.5vw,3rem);margin:.4rem 0 .6rem}
.page-hero p{margin:0;max-width:56ch;color:#e3f6f7}
.page-hero .eyebrow{color:var(--yellow)}
.err{background:#fde7e3}
:root[data-theme="dark"] .promo-time{color:var(--teal)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .promo-time{color:var(--teal)}}

/* Form báo giá: đầu – giữa – cuối trang */
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:2.5rem;align-items:center}
.hero-text{min-width:0}
.quote-card{background:#fff;color:#17323a;border-radius:20px;padding:1.5rem;display:grid;gap:.75rem;box-shadow:0 24px 60px rgba(0,40,44,.35);border-top:5px solid var(--yellow);scroll-margin-top:110px}
.quote-card h2{font-size:1.45rem;color:var(--teal-d)}
.quote-card .sub{margin:-.3rem 0 .2rem;font-size:.88rem;color:#587078}
.quote-card label,.qb-form label{display:grid;gap:.25rem;font-size:.8rem;font-weight:600;color:#587078}
.quote-card input,.quote-card select,.qb-form input,.qb-form select{width:100%;border:1.5px solid #dbe8ea;border-radius:11px;padding:.65rem .8rem;font:inherit;font-size:.95rem;background:#f7fbfb;color:#17323a}
.quote-card input:focus,.quote-card select:focus,.qb-form input:focus,.qb-form select:focus{border-color:var(--teal);outline:none;background:#fff}
.quote-card .row{display:grid;grid-template-columns:1.3fr .7fr;gap:.7rem}
.quote-card .btn{width:100%;padding-block:.9rem;font-size:1rem}
.quote-card .ok{color:#17323a}
.quote-card .safe{margin:0;font-size:.75rem;color:#7a8f95;text-align:center}
.quote-card.flash{animation:flash 1.2s ease}
@keyframes flash{0%,100%{box-shadow:0 24px 60px rgba(0,40,44,.35)}35%{box-shadow:0 0 0 6px var(--yellow),0 24px 60px rgba(0,40,44,.35)}}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}.hero .wrap.hero-grid{padding-block:3rem 7rem}}
.quote-band{background:linear-gradient(120deg,var(--yellow) 0%,#ffc94d 100%);color:#2a1d00}
.quote-band .wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:2rem;align-items:center;padding-block:3rem}
.quote-band .eyebrow{color:var(--teal-dd)}
.quote-band .eyebrow::before{background:var(--teal)}
.quote-band h2{font-size:clamp(1.5rem,2.8vw,2.1rem);margin:.4rem 0 .5rem;color:#1c2a10}
.quote-band p{margin:0;color:#4a3a10}
.qb-form{background:#fff;border-radius:18px;padding:1.2rem;display:grid;grid-template-columns:1fr 1fr;gap:.75rem;box-shadow:0 14px 34px rgba(120,80,0,.18)}
.qb-form .btn{grid-column:1/-1;background:var(--teal);color:#fff;padding-block:.85rem}
.qb-form .btn:hover{background:var(--teal-d)}
.qb-form .ok{grid-column:1/-1;color:#17323a}
@media (max-width:860px){.quote-band .wrap{grid-template-columns:1fr}}
@media (max-width:480px){.qb-form{grid-template-columns:1fr}.quote-card .row{grid-template-columns:1fr}}