/* DELTA-PI Co. Ltd - responsive corporate website */
:root{--navy:#102a43;--navy2:#173e5e;--blue:#ed7d18;--cyan:#f5a044;--ink:#172b3a;--muted:#667887;--line:#dce4ea;--paper:#f4f7f9;--white:#fff;--max:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;font-family:"Be Vietnam Pro",sans-serif;color:var(--ink);background:#fff;line-height:1.65}h1,h2,h3,.brand-name{font-family:"Be Vietnam Pro",sans-serif;letter-spacing:-.04em}a{color:inherit;text-decoration:none}.container{width:min(var(--max),calc(100% - 48px));margin:auto}.topbar{background:#0b2033;color:#c8d5df;font-size:12px;letter-spacing:.07em}.topbar-inner,.topbar-right{display:flex;align-items:center;justify-content:space-between}.topbar-inner{min-height:34px}.topbar-right{gap:22px}.topbar a{color:#dce7ef}.language-switch{border:0;border-left:1px solid #496071;background:none;color:#fff;padding:0 0 0 18px;font:700 12px "Be Vietnam Pro";cursor:pointer}.site-header{height:82px;background:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(16,42,67,.08)}.nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;color:var(--navy)}.brand-logo{width:110px;height:110px;object-fit:contain;flex:0 0 auto}.brand-name{font-size:20px;font-weight:800;line-height:1.05;letter-spacing:-.04em}.brand-name span{display:block;font:700 9px "Be Vietnam Pro";letter-spacing:.08em;margin-top:6px;color:var(--blue)}.main-nav{display:flex;align-items:center;gap:29px}.main-nav a{font-size:13px;font-weight:700;color:#455968;transition:.2s}.main-nav a:hover,.main-nav a.active{color:var(--blue)}.main-nav .nav-contact{background:var(--navy);color:#fff;padding:13px 19px}.main-nav .nav-contact:hover{background:var(--blue);color:#fff}.menu-toggle{display:none;border:0;background:none;padding:8px}.menu-toggle i{display:block;width:24px;height:2px;background:var(--navy);margin:5px}
.hero{height:min(690px,calc(100vh - 116px));min-height:570px;position:relative;display:flex;align-items:center;background:var(--navy);color:#fff;overflow:hidden}.hero-image{position:absolute;inset:0;background:url("https://images.unsplash.com/photo-1516937941344-00b4e0337589?auto=format&fit=crop&w=2200&q=90") center 48%/cover no-repeat;transform:scale(1.02)}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,26,43,.94) 0%,rgba(9,35,56,.82) 44%,rgba(9,35,56,.18) 100%),linear-gradient(0deg,rgba(5,22,37,.32),transparent 50%)}.hero-content{position:relative;padding-top:12px}.eyebrow{display:flex;align-items:center;gap:11px;color:var(--blue);font-size:12px;letter-spacing:.17em}.eyebrow>span{width:27px;height:2px;background:currentColor}.eyebrow.light{color:#f5a044}.hero h1{font-size:clamp(48px,6.4vw,82px);line-height:1.06;font-weight:700;max-width:760px;margin:24px 0}.hero-content>p{max-width:570px;color:#d8e2e9;font-size:17px;line-height:1.8}.hero-actions{display:flex;gap:13px;margin-top:32px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:25px;padding:15px 21px;font:700 13px "Be Vietnam Pro";border:1px solid transparent;cursor:pointer;transition:.2s}.btn-primary{background:var(--blue);color:white}.btn-primary:hover{background:#d96a0a;transform:translateY(-2px)}.btn-outline-light{border-color:rgba(255,255,255,.6);color:white}.btn-outline-light:hover{background:white;color:var(--navy)}.hero-note{display:flex;align-items:center;gap:12px;margin-top:65px;font-size:12px;letter-spacing:.2em;color:#c6d4df}.note-line{height:1px;width:42px;background:#f5a044}.hero-index{position:absolute;right:max(24px,calc((100vw - var(--max))/2));bottom:42px;display:flex;align-items:center;gap:10px;font-size:12px;color:#d7e3eb}.hero-index i{width:65px;height:1px;background:#8ca2b2}
.section-pad{padding:112px 0}.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}.intro h2,.section-heading h2,.products h2,.contact h2{font-size:clamp(36px,4.3vw,54px);line-height:1.16;margin:23px 0 0;font-weight:700}.intro h2 em,.section-heading h2 em,.products h2 em,.contact h2 em{font-style:normal;color:var(--blue)}.intro-copy{padding-top:26px;max-width:520px}.intro-copy p{font-size:17px;line-height:1.9;margin:0 0 17px}.muted{color:var(--muted)}.text-link{display:inline-flex;gap:28px;align-items:center;color:var(--blue);font-size:13px;font-weight:700;margin-top:15px;border-bottom:1px solid #f3c28f;padding-bottom:8px}.capability-strip{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:78px;padding:24px 0}.capability-strip div{display:flex;align-items:center;gap:15px;padding-left:20px;border-right:1px solid var(--line)}.capability-strip div:first-child{padding-left:0}.capability-strip div:last-child{border:0}.capability-strip strong{font:700 13px "Be Vietnam Pro";color:var(--blue)}.capability-strip span{font-size:13px;font-weight:700}
.services{background:var(--navy);color:white}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:45px;margin-bottom:48px}.section-heading h2{margin-bottom:0}.section-heading>p{max-width:380px;color:#a9bbc8;font-size:15px;line-height:1.8;margin:0 0 5px}.section-heading .eyebrow{color:#f5a044}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #385168;border-left:1px solid #385168}.service-card{position:relative;min-height:265px;padding:28px 28px 30px;border-right:1px solid #385168;border-bottom:1px solid #385168;transition:.25s}.service-card:hover{background:#173b59;transform:translateY(-3px)}.service-icon{font-size:30px;color:#f5a044;margin-bottom:23px}.card-no{display:block;font-size:12px;letter-spacing:.15em;color:#9fb3c3}.service-card h3{font-size:21px;margin:10px 0}.service-card p{font-size:13px;color:#a9bbc8;line-height:1.8;max-width:290px}.service-card>a{position:absolute;right:27px;bottom:26px;color:#f5a044;font-size:21px}
.solutions{background:var(--paper)}.dark-heading>p{color:#5a6b78}.solution-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:16px}.solution-card{height:365px;position:relative;overflow:hidden;background:var(--navy)}.solution-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s}.solution-card:hover img{transform:scale(1.06)}.solution-card:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(5,24,40,.9),transparent 72%)}.solution-overlay{position:absolute;z-index:1;bottom:26px;left:25px;right:25px;color:white}.solution-overlay span,.project-info span{font-size:12px;letter-spacing:.15em;color:#f5a044}.solution-overlay h3{font-size:26px;margin:8px 0 3px}.solution-overlay p{font-size:12px;color:#d1dce4;margin:0;max-width:300px}
.products-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:100px}.products-intro p,.contact-copy>p{color:var(--muted);font-size:15px;line-height:1.9;max-width:420px;margin:24px 0}.product-list{border-top:1px solid var(--line)}.product-list a{display:grid;grid-template-columns:35px 1fr 28px;gap:12px;align-items:center;padding:21px 5px;border-bottom:1px solid var(--line);transition:.2s}.product-list a:hover{padding-left:13px;color:var(--blue)}.product-list a>span{font-size:12px;color:var(--blue)}.product-list strong{font:700 16px "Be Vietnam Pro"}.product-list small{grid-column:2;font-size:12px;color:var(--muted);margin-top:-9px}.product-list a>b{grid-column:3;grid-row:1/3;color:var(--blue);font-size:19px}
.projects{background:#f4f7f9}.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.project-card{background:white}.project-card img{display:block;width:100%;height:220px;object-fit:cover}.project-info{padding:22px 22px 25px}.project-info span{color:var(--blue);font-size:12px}.project-info h3{font-size:19px;margin:9px 0}.project-info p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}.disclaimer{font-size:12px;color:#84929c;margin-top:18px}
.quality{background:linear-gradient(110deg,#0c263d,#17476b);color:white;padding:77px 0}.quality-inner{display:flex;justify-content:space-between;align-items:center;gap:50px}.quality h2{font-size:clamp(32px,4vw,48px);line-height:1.2;margin:20px 0 0}.quality-points{display:grid;grid-template-columns:1fr 1fr;gap:22px 48px;min-width:390px}.quality-points div{display:flex;gap:13px;align-items:center;border-bottom:1px solid #42617a;padding-bottom:12px}.quality-points b{font-size:12px;color:#f5a044}.quality-points span{font-size:13px;font-weight:600}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:100px}.contact-copy>p{margin-bottom:35px}.contact-detail{border-top:1px solid var(--line);padding:14px 0;display:flex;flex-direction:column;gap:3px}.contact-detail span{font-size:12px;letter-spacing:.15em;color:var(--blue);font-weight:700}.contact-detail a,.contact-detail p{font-size:14px;margin:0}.contact-form{background:var(--paper);padding:37px 40px}.contact-form h3{font-size:26px;margin:0}.contact-form>p{font-size:12px;color:var(--muted);margin:3px 0 23px}.contact-form label{display:flex;flex-direction:column;gap:7px;margin-bottom:15px}.contact-form label span{font-size:12px;font-weight:700;color:#425768}.contact-form input,.contact-form select,.contact-form textarea{width:100%;border:1px solid #d9e2e8;background:white;padding:12px 13px;font:12px "Be Vietnam Pro";color:var(--ink);outline:none;border-radius:0}.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{border-color:var(--blue)}.contact-form textarea{resize:vertical}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.submit-btn{width:100%;justify-content:space-between;border:0}.contact-form small{display:block;font-size:12px;color:#7d8b95;margin-top:12px}.form-feedback{font-size:13px;color:#176b48;margin-top:10px;min-height:18px}
.footer{background:#091d2e;color:#d6e1e8;padding:55px 0 0}.footer-main{display:grid;grid-template-columns:1fr 1.3fr 1fr;gap:45px;align-items:start;padding-bottom:45px}.brand-light{color:white}.footer-main>p{font-size:13px;color:#9fb0bd;max-width:320px;margin:0}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:13px}.footer-links a{font-size:12px;color:#c0ced8}.footer-links a:hover,.footer-bottom a:hover{color:#f5a044}.footer-bottom{border-top:1px solid #294154;padding:17px 0;display:flex;justify-content:space-between;color:#8397a6;font-size:12px}.footer-bottom a{color:#c6d3dc}
@media(max-width:900px){.main-nav{gap:15px}.main-nav a{font-size:12px}.intro-grid,.products-layout,.contact-grid{gap:45px}.service-card{padding:23px;min-height:285px}.solution-grid{grid-template-columns:1fr 1fr}.solution-large{grid-column:span 2;height:330px}.quality-inner{align-items:flex-start;flex-direction:column}.quality-points{width:100%}}
@media(max-width:700px){.brand-logo{width:43px;height:43px}.brand-name{font-size:18px}.brand-name span{font-size:9px}.container{width:min(100% - 36px,var(--max))}.topbar-inner>span{font-size:12px}.topbar-right{gap:10px}.topbar-right>a{font-size:12px}.site-header{height:70px}.menu-toggle{display:block}.main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:white;padding:15px 22px 22px;box-shadow:0 12px 20px #102a431a;flex-direction:column;align-items:stretch;gap:0}.main-nav.open{display:flex}.main-nav a{padding:13px 4px;border-bottom:1px solid var(--line);font-size:14px}.main-nav .nav-contact{margin-top:12px;text-align:center;border:0}.hero{min-height:620px;height:calc(100svh - 104px);max-height:760px}.hero-shade{background:linear-gradient(90deg,rgba(7,26,43,.93),rgba(9,35,56,.57)),linear-gradient(0deg,rgba(5,22,37,.45),transparent)}.hero h1{font-size:clamp(43px,12vw,65px)}.hero-content>p{font-size:15px}.hero-actions{align-items:flex-start;flex-direction:column}.hero-note{margin-top:47px;font-size:12px}.hero-index{display:none}.section-pad{padding:76px 0}.intro-grid,.products-layout,.contact-grid{grid-template-columns:1fr;gap:25px}.intro-copy{padding-top:0}.intro h2,.section-heading h2,.products h2,.contact h2{font-size:39px}.capability-strip{grid-template-columns:1fr 1fr;row-gap:18px;margin-top:48px}.capability-strip div:nth-child(2){border-right:0}.capability-strip div:nth-child(3){padding-left:0}.section-heading{display:block;margin-bottom:32px}.section-heading>p{margin-top:20px}.service-grid{grid-template-columns:1fr 1fr}.service-card{min-height:280px;padding:19px}.service-card h3{font-size:18px}.service-card p{font-size:12px}.service-icon{margin-bottom:17px}.solution-grid{grid-template-columns:1fr}.solution-large{grid-column:auto;height:330px}.solution-card{height:300px}.products-layout{gap:35px}.project-grid{grid-template-columns:1fr}.project-card img{height:230px}.quality{padding:65px 0}.quality-points{min-width:0;grid-template-columns:1fr 1fr;gap:18px}.contact-form{padding:27px 21px}.footer-links{max-width:300px}.footer-bottom{gap:15px;flex-wrap:wrap}}
@media(max-width:420px){.service-grid{grid-template-columns:1fr}.service-card{min-height:240px}.form-row{grid-template-columns:1fr;gap:0}.topbar-inner>span{max-width:195px}.topbar-right>a{display:none}.quality-points{grid-template-columns:1fr}}

/* ---- Professional refinements ---- */
:root{--blue-dark:#d96a0a;--brand-blue:#1f4e9c}
body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,.brand-name{letter-spacing:-.025em}
.hero h1{line-height:1.15}.intro h2,.section-heading h2,.products h2,.contact h2,.quality h2{line-height:1.25}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--navy);color:#fff;padding:10px 16px;z-index:100}.skip-link:focus{left:8px}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
.site-header{box-shadow:0 1px 0 rgba(16,42,67,.06);backdrop-filter:saturate(1.4) blur(8px)}
.main-nav a.active:not(.nav-contact){box-shadow:0 2px 0 var(--blue);padding-bottom:4px}
.hero-image{background:radial-gradient(circle at 78% 42%,#1d4f78 0,transparent 55%),linear-gradient(120deg,#081a2b,#102a43);transform:none}
.hero-image:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 120px)}
.hero-image:after{content:"";position:absolute;inset:0;background:url(assets/delta-pi-mark.png) right 9% center/min(44vw,500px) no-repeat;opacity:.18}
.hero-shade{background:linear-gradient(90deg,rgba(7,26,43,.55),transparent 70%)}
.hero-content>p{font-size:18px}
.service-card p,.solution-overlay p,.project-info p,.product-list small,.contact-detail a,.contact-detail p{font-size:14px}
.service-card p{color:#b8c8d4}.service-icon{width:30px;height:30px;margin-bottom:24px}.service-icon svg{width:100%;height:100%;fill:none;stroke:var(--cyan);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.service-card>a{width:34px;height:34px;display:grid;place-items:center;border:1px solid #385168;border-radius:50%;font-size:17px;right:24px;bottom:24px;transition:.2s}.service-card>a:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.btn-primary{box-shadow:0 8px 20px rgba(237,125,24,.25)}.btn-primary:hover{box-shadow:0 10px 24px rgba(217,106,10,.3)}
.main-nav .nav-contact:hover{background:var(--blue-dark)}
.project-visual{height:220px;position:relative;overflow:hidden;display:flex;align-items:flex-end;padding:20px;background:linear-gradient(135deg,#0c263d,#1d4f78)}
.project-visual:before{content:"";position:absolute;inset:0;background:url(assets/delta-pi-mark.png) right -24px center/190px no-repeat;opacity:.22}
.project-visual span{position:relative;font:700 52px "Be Vietnam Pro";color:var(--cyan);line-height:1}
.project-card{border:1px solid var(--line);transition:.25s}.project-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(16,42,67,.1)}
.project-info span{font-size:12px;font-weight:700}
.map-link{font-size:13px;font-weight:700;color:var(--blue-dark);margin-top:4px}
.contact-form{border-top:3px solid var(--blue)}.contact-form label span{font-size:13px}.contact-form input,.contact-form select,.contact-form textarea{font-size:15px}
.contact-form small{font-size:12px}.form-feedback{font-size:14px}
.footer-bottom{font-size:12px}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}.reveal{opacity:1;transform:none}}
@media(max-width:700px){.hero-image:after{background-position:right -60px bottom 40px;opacity:.1;background-size:300px}.hero-content>p{font-size:16px}.project-visual{height:170px}}

.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.submit-btn:disabled{opacity:.6;cursor:wait}.form-feedback.error{color:#b42318}.form-feedback a{text-decoration:underline}

/* ---- Content update (profile) ---- */
.hero-image{background:url(assets/img/hero.jpg) center 35%/cover no-repeat}.hero-image:before,.hero-image:after{display:none}
.hero-shade{background:linear-gradient(90deg,rgba(7,26,43,.94) 0%,rgba(9,35,56,.8) 46%,rgba(9,35,56,.38) 100%)}
.about-band{display:grid;grid-template-columns:1.15fr .85fr;margin-top:72px;border:1px solid var(--line)}
.about-band img{width:100%;height:100%;min-height:340px;object-fit:cover;display:block}
.company-card{padding:36px 38px;background:var(--paper);display:flex;flex-direction:column;justify-content:center}
.company-card h3{font-size:22px;margin:0 0 8px}.company-card dt{font-size:12px;letter-spacing:.12em;font-weight:700;color:var(--blue-dark);margin-top:16px}.company-card dd{margin:3px 0 0;font-size:15px;line-height:1.6}.company-card dl{margin:0}
.direction{background:var(--paper)}.direction-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.direction-card{background:#fff;padding:34px 30px;border-top:3px solid var(--blue)}.direction-card h3{font-size:23px;margin:0 0 14px}.direction-card p{font-size:15px;color:var(--muted);line-height:1.85;margin:0}
.values{list-style:none;margin:0;padding:0}.values li{padding:12px 0;border-bottom:1px solid var(--line);font-size:16px;font-weight:600}.values li:first-child{padding-top:0}
.why{background:linear-gradient(110deg,#0c263d,#17476b);color:#fff;padding:96px 0}.why h2{font-size:clamp(32px,4vw,48px);line-height:1.25;margin:20px 0 0}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:48px}.why-item{border-top:1px solid #42617a;padding-top:22px}
.why-item b{font-size:13px;color:var(--cyan)}.why-item h3{font-size:20px;margin:10px 0}.why-item p{font-size:15px;line-height:1.8;color:#b8c8d4;margin:0}
.project-card img{height:230px}.gallery-title{font-size:13px;letter-spacing:.15em;color:var(--blue-dark);margin:56px 0 18px}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.gallery button{padding:0;border:0;background:var(--navy);cursor:zoom-in;aspect-ratio:4/3;overflow:hidden}
.gallery img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}.gallery button:hover img{transform:scale(1.06)}
.lightbox{border:0;padding:0;background:transparent;max-width:min(1100px,94vw);overflow:visible}.lightbox::backdrop{background:rgba(5,15,25,.88)}
.lightbox img{max-width:100%;max-height:80vh;display:block;margin:auto}.lightbox p{color:#fff;text-align:center;font-size:15px;margin:12px 0 0}
.lb-close{position:absolute;right:0;top:-44px;background:none;border:0;color:#fff;font-size:34px;cursor:pointer;line-height:1}
.partners{background:#fff}.logo-group+.logo-group{margin-top:48px}.logo-group h3{font-size:13px;letter-spacing:.15em;color:var(--muted);margin:0 0 18px}
.logo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px}
.logo-grid div{height:100px;border:1px solid var(--line);display:grid;place-items:center;padding:18px;background:#fff;transition:.2s}.logo-grid div:hover{box-shadow:0 10px 24px rgba(16,42,67,.09);border-color:#f3c28f}
.logo-grid img{max-width:100%;max-height:56px;object-fit:contain;filter:none;opacity:1;transition:.25s}.logo-grid div:hover img{filter:none;opacity:1}
.footer-main>p{line-height:1.8}
@media(max-width:900px){.about-band{grid-template-columns:1fr}.direction-grid{grid-template-columns:1fr}.why-grid{grid-template-columns:1fr 1fr}.gallery{grid-template-columns:repeat(3,1fr)}}
@media(max-width:700px){.why{padding:72px 0}.why-grid{grid-template-columns:1fr;gap:22px}.gallery{grid-template-columns:1fr 1fr}.about-band{margin-top:48px}.company-card{padding:26px 22px}.logo-grid{grid-template-columns:repeat(2,1fr)}}

/* logo panel, hero, colored partner logos */
.about-band .logo-panel{background:#fff;display:grid;place-items:center;padding:40px 32px;border-right:1px solid var(--line)}
.about-band .logo-panel img{width:min(440px,100%);height:auto;min-height:0;object-fit:contain}
.hero-image{background-position:center 40%}
@media(max-width:900px){.about-band .logo-panel{border-right:0;border-bottom:1px solid var(--line);padding:32px 20px}}


/* Back to top */
.to-top{position:fixed;right:max(18px,env(safe-area-inset-right,0px));bottom:max(18px,env(safe-area-inset-bottom,0px));width:48px;height:48px;border:0;border-radius:50%;background:var(--blue);color:#fff;cursor:pointer;display:grid;place-items:center;box-shadow:0 8px 22px rgba(16,42,67,.28);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s,background .2s;z-index:30}
.to-top.show{opacity:1;visibility:visible;transform:none}.to-top:hover{background:var(--blue-dark);transform:translateY(-3px)}
.to-top svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
@media(max-width:700px){.to-top{width:44px;height:44px}}

/* ---- ver2 updates ---- */
.intro-copy{max-width:580px}
.intro-list{margin:8px 0 0;padding:0;list-style:none}.intro-list li{position:relative;padding:13px 0 13px 30px;border-bottom:1px solid var(--line);font-size:16px;font-weight:500}.intro-list li:before{content:"";position:absolute;left:0;top:23px;width:15px;height:2px;background:var(--blue)}.intro-list li:first-child{border-top:1px solid var(--line)}
.fields{background:var(--paper)}.field-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.field-card{background:#fff;border:1px solid var(--line);overflow:hidden;transition:.25s}.field-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(16,42,67,.1)}
.field-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--navy)}.field-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s}.field-card:hover .field-img img{transform:scale(1.06)}
.field-img:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(5,24,40,.55),transparent 55%)}.field-img b{position:absolute;z-index:1;left:18px;bottom:12px;color:#fff;font:700 23px "Be Vietnam Pro"}
.field-text{padding:22px 22px 26px}.field-text h3{font-size:20px;margin:0 0 8px}.field-text p{font-size:15px;line-height:1.75;color:var(--muted);margin:0}
.news{background:#fff}.tabs{display:flex;border-bottom:1px solid var(--line);margin-bottom:32px}
.tabs button{background:none;border:0;padding:14px 28px;font:700 16px "Be Vietnam Pro";color:#5a6b78;cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-1px;transition:.2s}.tabs button:hover{color:var(--navy)}.tabs button[aria-selected=true]{color:var(--navy);border-color:var(--blue)}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.post{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column}
.post img{width:100%;height:200px;object-fit:cover;display:block}.post-in{padding:22px 24px 26px}.post-meta{font-size:13px;color:var(--blue-dark);font-weight:700;letter-spacing:.06em}
.post h3{font-size:20px;margin:8px 0 10px;line-height:1.35}.post p{font-size:15px;color:var(--muted);line-height:1.8;margin:0}.post-body p+p{margin-top:10px}
details summary{cursor:pointer;color:var(--blue-dark);font-weight:700;font-size:14px;margin-top:14px}.post-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:700;color:var(--blue-dark)}
.job{background:#fff;border:1px solid var(--line);border-left:3px solid var(--blue);padding:26px 28px;margin-bottom:14px;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:start}
.job h3{font-size:21px;margin:0}.chips span{display:inline-block;font-size:13px;font-weight:600;background:var(--paper);padding:4px 11px;margin:10px 8px 0 0}
.job p{font-size:15px;color:var(--muted);line-height:1.8;margin:12px 0 0}.job h4{font-size:14px;margin:14px 0 0;color:var(--navy)}.job ul{margin:6px 0 0 18px;padding:0;font-size:15px;color:var(--muted);line-height:1.8}
.empty{background:var(--paper);border:1px dashed #c0cdd7;padding:44px 24px;text-align:center;color:var(--muted);font-size:16px;line-height:1.8;grid-column:1/-1}.empty a{color:var(--blue-dark);font-weight:700}
@media(max-width:1100px){.main-nav{gap:20px}.field-grid{grid-template-columns:1fr 1fr}.post-grid{grid-template-columns:1fr 1fr}}
@media(max-width:1100px){.site-header{height:70px}.menu-toggle{display:block}.main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;padding:15px 22px 22px;box-shadow:0 12px 20px #102a431a;flex-direction:column;align-items:stretch;gap:0}.main-nav.open{display:flex}.main-nav a{padding:13px 4px;border-bottom:1px solid var(--line);font-size:14px}.main-nav .nav-contact{margin-top:12px;text-align:center;border:0}}
@media(max-width:700px){.field-grid,.post-grid{grid-template-columns:1fr}.field-img{aspect-ratio:16/10}.tabs button{flex:1;padding:14px 8px}.job{grid-template-columns:1fr;padding:22px 20px}}

/* ---- ver3: larger text, profile card, Zalo ---- */
body{font-size:17px}
.profile-card{display:grid;grid-template-columns:auto 1fr auto;gap:34px;align-items:center;margin-top:64px;padding:28px 38px;background:linear-gradient(100deg,#eaf1fa,#fff 70%);border:1px solid var(--line);border-left:4px solid var(--blue)}
.profile-card img{width:116px;height:auto;display:block;box-shadow:0 12px 26px rgba(16,42,67,.28);transform:rotate(-3deg)}
.profile-card h3{font-size:25px;margin:0 0 8px}.profile-card p{margin:0;font-size:16px;color:var(--muted);line-height:1.75;max-width:560px}
.profile-meta{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--blue-dark);margin-top:10px}
.profile-actions{display:flex;gap:12px;flex-wrap:wrap}.profile-actions .btn{gap:10px;padding:14px 24px}
.profile-actions svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.btn-navy{background:var(--navy);color:#fff}.btn-navy:hover{background:var(--navy2);transform:translateY(-2px)}
.btn-outline-dark{border-color:var(--navy);color:var(--navy);background:#fff}.btn-outline-dark:hover{background:var(--navy);color:#fff}
.zalo-float{position:fixed;right:max(14px,env(safe-area-inset-right,0px));top:50%;transform:translateY(-50%);width:56px;height:56px;z-index:31;display:block;border-radius:50%;filter:drop-shadow(0 6px 14px rgba(0,104,255,.4));transition:transform .2s}
.zalo-float:hover{transform:translateY(-50%) scale(1.08)}.zalo-float svg{width:100%;height:100%;display:block}
.zalo-float:before{content:"";position:absolute;inset:0;border-radius:50%;background:#0068ff;opacity:.45;animation:zaloPulse 2.2s ease-out infinite;z-index:-1}
@keyframes zaloPulse{0%{transform:scale(1);opacity:.45}100%{transform:scale(1.7);opacity:0}}
.zalo-tip{position:absolute;right:66px;top:50%;transform:translateY(-50%);background:var(--navy);color:#fff;font:700 13px "Be Vietnam Pro";padding:7px 12px;white-space:nowrap;opacity:0;pointer-events:none;transition:.2s}
.zalo-float:hover .zalo-tip,.zalo-float:focus-visible .zalo-tip{opacity:1}
@media(max-width:900px){.profile-card{grid-template-columns:auto 1fr}.profile-actions{grid-column:1/-1}}
@media(max-width:700px){.profile-card{grid-template-columns:1fr;text-align:center;padding:26px 22px;gap:22px;justify-items:center}.profile-card p{margin:auto}.profile-actions{justify-content:center;width:100%}.profile-actions .btn{flex:1;min-width:130px}.zalo-float{width:50px;height:50px}.zalo-tip{display:none}}
@media(prefers-reduced-motion:reduce){.zalo-float:before{animation:none;display:none}}

/* ---- ver4: projects carousel + modal, Zalo popup, footer ---- */
.proj-carousel{position:relative}
.proj-track{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:8px 2px 24px;scrollbar-width:none;cursor:grab}
.proj-track::-webkit-scrollbar{display:none}.proj-track.dragging{scroll-snap-type:none;scroll-behavior:auto;cursor:grabbing;user-select:none}
.proj-card{flex:0 0 calc((100% - 36px)/3);scroll-snap-align:start;text-align:left;background:#fff;border:1px solid var(--line);padding:0;cursor:pointer;display:flex;flex-direction:column;font:inherit;color:inherit;transition:transform .25s,box-shadow .25s}
.proj-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(16,42,67,.12)}
.proj-img{position:relative;display:block;aspect-ratio:4/3;overflow:hidden;background:var(--navy)}
.proj-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s;-webkit-user-drag:none}.proj-card:hover .proj-img img{transform:scale(1.06)}
.proj-badge{display:inline-block;font-size:12px;font-weight:700;padding:5px 12px;color:#fff;background:#1a7f4b;letter-spacing:.03em}.proj-badge.ongoing{background:var(--blue-dark)}
.proj-img .proj-badge{position:absolute;left:14px;top:14px}
.proj-info{display:flex;flex-direction:column;gap:6px;padding:20px 22px 24px;flex:1}
.proj-cat{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--blue-dark)}
.proj-info strong{font:700 19px/1.4 "Be Vietnam Pro";color:var(--ink);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.proj-client{font-size:14px;color:var(--muted)}.proj-more{margin-top:auto;padding-top:10px;font-size:14px;font-weight:700;color:var(--blue-dark)}
.proj-nav{position:absolute;top:34%;width:46px;height:46px;border-radius:50%;border:0;background:#fff;box-shadow:0 6px 18px rgba(16,42,67,.28);cursor:pointer;font-size:26px;line-height:1;z-index:2;color:var(--navy);transition:.2s}
.proj-nav:hover{background:var(--blue);color:#fff}.proj-nav.prev{left:-16px}.proj-nav.next{right:-16px}.proj-nav:disabled{opacity:.35;cursor:default;background:#fff;color:var(--navy)}
.proj-modal{border:0;padding:0;width:min(1120px,94vw);max-height:92vh;background:#fff;overflow:hidden}
.proj-modal[open]{display:grid;grid-template-columns:1.3fr .7fr}.proj-modal::backdrop{background:rgba(5,15,25,.84)}
.pm-gallery{background:#0b2033;display:flex;flex-direction:column;min-width:0}
.pm-main{position:relative;flex:1;min-height:340px;display:grid;place-items:center;background:#000}
.pm-main img{width:100%;height:100%;max-height:70vh;object-fit:contain;display:block}
.pm-arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;border:0;background:rgba(255,255,255,.9);font-size:26px;line-height:1;cursor:pointer;color:var(--navy)}.pm-arrow.prev{left:12px}.pm-arrow.next{right:12px}.pm-arrow:hover{background:var(--blue);color:#fff}
.pm-count{position:absolute;left:12px;bottom:12px;background:rgba(0,0,0,.6);color:#fff;font-size:13px;padding:4px 10px}
.pm-thumbs{display:flex;gap:8px;padding:10px 12px;overflow-x:auto}.pm-thumbs button{flex:0 0 82px;height:58px;padding:0;border:2px solid transparent;background:none;opacity:.6;cursor:pointer;transition:.2s}
.pm-thumbs button[aria-current=true]{border-color:var(--cyan);opacity:1}.pm-thumbs img{width:100%;height:100%;object-fit:cover;display:block}
.pm-caption{color:#c8d5df;font-size:14px;margin:0;padding:0 14px 14px;min-height:20px}
.pm-info{padding:36px 32px 32px;overflow:auto;max-height:92vh}.pm-info h3{font-size:24px;line-height:1.4;margin:14px 0 20px}
.pm-info dl{margin:0 0 16px}.pm-info dt{font-size:12px;letter-spacing:.1em;font-weight:700;color:var(--blue-dark)}.pm-info dd{margin:2px 0 14px;font-size:16px;font-weight:600}
.pm-summary{font-size:15px;line-height:1.8;color:var(--muted);margin:0 0 18px}.pm-info h4{font-size:12px;letter-spacing:.12em;color:var(--navy);margin:0 0 6px}
.pm-scope{list-style:none;margin:0 0 26px;padding:0}.pm-scope li{position:relative;padding:9px 0 9px 24px;border-bottom:1px solid var(--line);font-size:15px}.pm-scope li:before{content:"";position:absolute;left:0;top:19px;width:12px;height:2px;background:var(--blue)}
.pm-close{position:absolute;top:10px;right:12px;z-index:5;width:40px;height:40px;border:0;border-radius:50%;background:rgba(255,255,255,.95);font-size:26px;line-height:1;cursor:pointer;color:var(--navy)}.pm-close:hover{background:var(--blue);color:#fff}
.zalo-wrap{position:fixed;right:max(18px,env(safe-area-inset-right,0px));bottom:max(18px,env(safe-area-inset-bottom,0px));z-index:31;transition:bottom .3s}
body.top-visible .zalo-wrap{bottom:calc(max(18px,env(safe-area-inset-bottom,0px)) + 62px)}
.zalo-wrap .zalo-float{position:relative;top:auto;right:auto;transform:none;width:52px;height:52px;border:0;padding:0;background:none;display:block;border-radius:50%;cursor:pointer}
.zalo-wrap .zalo-float:hover{transform:scale(1.08)}
.zalo-pop{position:absolute;right:64px;bottom:0px;width:270px;background:#fff;padding:22px 20px 20px;text-align:center;box-shadow:0 16px 40px rgba(16,42,67,.3);border-top:3px solid #0068ff}
.zalo-pop h4{font-size:16px;margin:0 0 12px;padding-right:20px}.zalo-pop img{width:180px;height:180px;display:block;margin:0 auto 10px;border:1px solid var(--line)}
.zalo-pop p{font-size:13px;color:var(--muted);margin:0 0 12px;line-height:1.6}.zalo-open{width:100%;background:#0068ff;color:#fff;padding:12px}.zalo-open:hover{background:#0053cc}
.zalo-num{font-size:14px;font-weight:700;margin-top:10px;color:var(--navy)}
.zalo-close{position:absolute;top:6px;right:8px;border:0;background:none;font-size:24px;cursor:pointer;color:#667887;line-height:1}
@media(max-width:1100px){.proj-card{flex-basis:calc((100% - 18px)/2)}}
@media(max-width:860px){.proj-modal[open]{display:block;overflow-y:auto}.pm-main{min-height:240px}.pm-main img{max-height:52vh}.pm-info{max-height:none;padding:24px 20px 26px}}
@media(max-width:700px){.proj-card{flex-basis:84%}.proj-nav{display:none}.zalo-wrap .zalo-float{width:48px;height:48px}body.top-visible .zalo-wrap{bottom:calc(max(18px,env(safe-area-inset-bottom,0px)) + 58px)}.zalo-pop{width:min(270px,calc(100vw - 36px))}}

/* ---- WhatsApp button (above Zalo) ---- */
.wa-wrap{bottom:calc(max(18px,env(safe-area-inset-bottom,0px)) + 62px)}
body.top-visible .wa-wrap{bottom:calc(max(18px,env(safe-area-inset-bottom,0px)) + 124px)}
.wa-wrap .zalo-pop{border-top-color:#25d366}.wa-open{background:#25d366!important;color:#fff}.wa-open:hover{background:#1da851!important}
.wa-wrap .zalo-float{filter:drop-shadow(0 6px 14px rgba(37,211,102,.4))}
@media(max-width:700px){.wa-wrap{bottom:calc(max(18px,env(safe-area-inset-bottom,0px)) + 58px)}body.top-visible .wa-wrap{bottom:calc(max(18px,env(safe-area-inset-bottom,0px)) + 116px)}}


/* Logo chân trang lớn hơn */
.footer .brand-logo{width:100px;height:100px}
.footer .brand-name{font-size:26px}
.footer .brand-name span{font-size:11px}
@media(max-width:700px){
  .footer .brand-logo{width:68px;height:68px}
  .footer .brand-name{font-size:22px}
}
/* Fix: footer 3 cột gây tràn ngang trên mobile */
html,body{overflow-x:clip}
@media(max-width:900px){
  .footer-main{grid-template-columns:1fr 1fr;gap:32px}
  .footer-main>:first-child{grid-column:1/-1}
}
@media(max-width:700px){
  .footer-main{grid-template-columns:1fr;gap:28px}
  .footer-links{max-width:100%;grid-template-columns:1fr 1fr}
  .footer-links a{overflow-wrap:anywhere;min-width:0}
}