:root{
  --green:#2f6b3f;--green-d:#1f4a2b;--leaf:#8bb174;--sand:#f6f2ea;--ink:#1d2a22;--muted:#5b6b60;--line:#e2ddd0;
  --r:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,sans-serif;color:var(--ink);background:#fff;line-height:1.65}
h1,h2,h3{font-family:'Be Vietnam Pro',system-ui,sans-serif;line-height:1.2}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.logo{font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:1.3rem;color:var(--green-d)}
.logo span{color:var(--leaf)}
.nav nav{display:flex;align-items:center;gap:24px;font-size:.95rem}
.nav nav a:not(.btn):hover{color:var(--green)}
.menu-btn{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer}

.btn{display:inline-block;background:var(--green);color:#fff;padding:13px 26px;border-radius:999px;font-weight:500;border:0;cursor:pointer;font-size:1rem;font-family:inherit;transition:.2s}
.btn:hover{background:var(--green-d);transform:translateY(-1px)}
.btn-sm{padding:8px 18px;font-size:.9rem}
.btn-ghost{background:transparent;color:var(--green-d);border:1.5px solid var(--green)}
.btn-ghost:hover{background:var(--green);color:#fff}

.img{background:linear-gradient(135deg,#a9c79a,#5e8f5f);background-size:cover;background-position:center}

.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center;max-width:1240px;margin:0 auto;padding:56px 24px}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;color:var(--green);font-weight:600;margin-bottom:12px}
.hero h1{font-size:clamp(2rem,4.5vw,3.4rem);color:var(--green-d)}
.lead{margin:18px 0 26px;color:var(--muted);font-size:1.08rem;max-width:520px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-img{height:520px;border-radius:28px}
.stats{display:flex;gap:32px;list-style:none;margin-top:36px;flex-wrap:wrap}
.stats strong{display:block;font-family:'Be Vietnam Pro',sans-serif;font-size:1.6rem;color:var(--green-d)}
.stats span{font-size:.85rem;color:var(--muted)}

.section{padding:84px 0}
.section.alt{background:var(--sand)}
.section h2{font-size:clamp(1.6rem,3vw,2.3rem);color:var(--green-d);margin-bottom:36px;max-width:640px}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(31,74,43,.1)}
.ico{font-size:1.8rem}
.card h3{font-size:1.2rem;margin:12px 0 6px}
.card p{color:var(--muted);font-size:.95rem}

.filters{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap}
.filters button{border:1px solid var(--line);background:#fff;padding:8px 18px;border-radius:999px;cursor:pointer;font-family:inherit;font-size:.9rem}
.filters button.on{background:var(--green);color:#fff;border-color:var(--green)}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.proj{background:#fff;border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.proj .img{height:300px;transition:transform .5s}
.proj:hover .img{transform:scale(1.03)}
.proj{overflow:hidden}
.proj figcaption{padding:16px 20px;display:flex;flex-direction:column;background:#fff;position:relative}
.proj figcaption span{color:var(--muted);font-size:.88rem}
.proj.hide{display:none}

.steps{list-style:none;counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.steps li{counter-increment:s;padding:24px;border-top:3px solid var(--leaf);background:var(--sand);border-radius:0 0 var(--r) var(--r)}
.steps li::before{content:"0" counter(s);font-family:'Be Vietnam Pro',sans-serif;font-size:1.8rem;color:var(--leaf);display:block}
.steps p{color:var(--muted);font-size:.93rem;margin-top:6px}

.about{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-img{height:420px;border-radius:24px}
.about p{color:var(--muted);margin-bottom:16px}
.ticks{list-style:none}
.ticks li::before{content:"✓ ";color:var(--green);font-weight:700}
.ticks li{margin:6px 0}

.contact{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact p{color:var(--muted)}
.info{margin-top:20px;line-height:2;color:var(--ink)!important}
form{background:var(--sand);padding:28px;border-radius:var(--r);display:grid;gap:14px}
label{display:grid;gap:6px;font-size:.9rem;font-weight:500}
input,select,textarea{font:inherit;padding:11px 14px;border:1px solid var(--line);border-radius:10px;background:#fff}
input:focus,select:focus,textarea:focus{outline:2px solid var(--leaf)}
.ok{color:var(--green);font-weight:500}



@media(max-width:860px){
  .hero,.about,.contact{grid-template-columns:1fr}
  .hero-img{height:320px}
  .cards{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .menu-btn{display:block}
  .nav nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:20px;border-bottom:1px solid var(--line)}
  .nav nav.open{display:flex}
}
@media(max-width:560px){
  .cards,.grid,.steps{grid-template-columns:1fr}
  .section{padding:56px 0}
}

.faq{max-width:820px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px}
.faq summary{font-weight:600;color:var(--green-d);cursor:pointer}
.faq details p{color:var(--muted);margin-top:10px}

.nav nav a.active:not(.btn){color:var(--green);font-weight:600}
.page-hero{background:var(--sand);padding:64px 0 56px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(1.9rem,4vw,2.8rem);color:var(--green-d);margin-bottom:10px}
.page-hero p:last-child{color:var(--muted);max-width:560px}
.more{margin-top:24px;font-weight:600;color:var(--green)}
.cta-band{background:var(--green-d);color:#fff;text-align:center;padding:64px 0}
.cta-band h2{color:#fff;margin:0 auto 10px;font-size:clamp(1.5rem,3vw,2.1rem)}
.cta-band p{color:#cfe0c8;margin-bottom:22px}
.btn-light{background:#fff;color:var(--green-d)}
.btn-light:hover{background:var(--sand)}
.stats.big strong{font-size:2.2rem}
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff;transition:.25s}
.post:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(31,74,43,.1)}
.post .img{height:200px}
.pbody{padding:20px}
.pbody h3{font-size:1.1rem;margin:8px 0}
.pbody p{color:var(--muted);font-size:.93rem}
.tag{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--green);font-weight:600}
.footer{background:var(--green-d);color:#cfe0c8;padding:48px 0 0;font-size:.92rem}
.footer .logo{color:#fff}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:32px}
.fgrid b{display:block;color:#fff;margin-bottom:10px}
.fgrid a:not(.logo){display:block;margin:4px 0}
.fgrid a:hover{color:#fff}
.fgrid p{margin-top:10px}
.copy{text-align:center;border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding:18px 20px}
@media(max-width:860px){.posts,.fgrid{grid-template-columns:1fr}}

.fab{position:fixed;right:16px;bottom:20px;z-index:50;display:flex;flex-direction:column;gap:12px}
.fab-btn{width:54px;height:54px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 6px 18px rgba(0,0,0,.25);transition:transform .2s}
.fab-btn:hover{transform:scale(1.08)}
.fab-zalo{background:#0068ff;font-weight:700;font-size:.8rem}
.fab-call{background:#e53935;animation:ring 2s infinite}
@keyframes ring{0%,100%{box-shadow:0 0 0 0 rgba(229,57,53,.5)}50%{box-shadow:0 0 0 12px rgba(229,57,53,0)}}

.hero-video{position:relative;min-height:640px;display:flex;align-items:center;overflow:hidden;background:#1f4a2b}
.hero-video video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hv-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,40,22,.78) 0%,rgba(15,40,22,.45) 55%,rgba(15,40,22,.2) 100%)}
.hv-content{position:relative;z-index:1;padding-top:80px;padding-bottom:80px;color:#fff}
.hv-content h1{color:#fff;font-size:clamp(2rem,5vw,3.6rem);max-width:720px}
.hv-content .eyebrow{color:#bfe0a8}
.hv-content .lead{color:#e6efe0;max-width:560px;margin:18px 0 26px}
.hv-content .stats span{color:#d6e6cf}
.hv-content .stats strong{color:#fff}
.btn-outline-light{background:transparent;color:#fff;border:1.5px solid #fff}
.btn-outline-light:hover{background:#fff;color:var(--green-d)}
@media(prefers-reduced-motion:reduce){.hero-video video{display:none}.hero-video{background:#1f4a2b url(images/hero.jpg) center/cover}}
@media(max-width:860px){.hero-video{min-height:560px}}

.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.err{color:#c62828;font-weight:500}