/* Khai Long: original charcoal / green identity, responsive PHP rebuild. */
:root{--green:#68be00;--green-dark:#408300;--ink:#242423;--muted:#696d67;--line:#e2e6dc;--paper:#f5f7f2;--dark:#222120;--wrap:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:16px/1.75 Arial,Helvetica,sans-serif;background:#fff}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait}a,button{transition:background .18s,color .18s,border-color .18s}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #009bb9;outline-offset:4px}h1,h2,h3,p{margin:0 0 20px}h1,h2,h3{line-height:1.25}h1{font-size:clamp(32px,3.4vw,48px);letter-spacing:-1.4px}h2{font-size:30px;letter-spacing:-.7px}h3{font-size:24px}p:last-child{margin-bottom:0}.wrap{width:min(var(--wrap),calc(100% - 64px));margin-inline:auto}.section{padding-block:76px}.eyebrow{color:var(--green-dark);font-size:12px;font-weight:700;letter-spacing:2px;line-height:1.5;margin-bottom:16px}.muted{color:var(--muted)}.sr-only,.skip-link:not(:focus){position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link:focus{position:fixed;top:12px;left:12px;z-index:99;background:white;padding:14px}.site-header{background:var(--dark);color:#fff}.topbar{background:var(--green);color:#172506}.topbar-inner{display:flex;align-items:center;justify-content:flex-end;gap:32px;min-height:41px;font-size:12px;font-weight:600}.topbar-inner a:hover{text-decoration:underline}.topbar-inner span[aria-hidden]{font-size:17px;margin-right:5px}.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:32px;min-height:102px}.brand{flex:0 0 231px}.brand img{width:231px;height:auto}.nav-wrap nav{display:flex;align-items:center;gap:32px}.nav-wrap nav a{position:relative;font-size:14px;font-weight:700;padding:36px 0;white-space:nowrap}.nav-wrap nav a:hover,.nav-wrap nav a[aria-current]{color:var(--green)}.nav-wrap nav a[aria-current]::after{content:'';position:absolute;bottom:23px;left:0;width:22px;height:3px;background:var(--green)}.menu-toggle{display:none;background:none;border:1px solid #666;color:white;padding:8px 14px}.hero{position:relative;background:#27352e;color:white}.hero-slide{position:relative;min-height:545px;display:flex;align-items:center}.hero-slide[hidden]{display:none}.hero-image,.hero-shade{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.hero-image{object-position:65% center}.hero-shade{background:linear-gradient(90deg,rgba(10,24,19,.9),rgba(14,26,22,.63) 50%,rgba(12,23,18,.1))}.hero-content{position:relative;z-index:1;padding-block:68px 112px}.hero-content .eyebrow{color:#a4e35a}.hero h1,.hero h2{font-size:clamp(38px,4vw,57px);letter-spacing:-1.7px;line-height:1.17;font-weight:700;margin-bottom:24px}.hero h1 span,.hero h2 span{color:#a4e35a}.hero-content>p:not(.eyebrow){max-width:540px;color:#e1e6e2;font-size:16px;line-height:1.9;margin-bottom:30px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:30px;padding:13px 23px;background:var(--green);border:1px solid var(--green);color:#172308;font-weight:700;font-size:14px;line-height:1.7;border-radius:0}.button:hover{background:#7bd215;border-color:#7bd215}.button span{font-size:21px;line-height:1}.hero-controls{position:absolute;bottom:24px;left:0;right:0;display:flex;align-items:center;justify-content:space-between;z-index:2}.slide-dots{display:flex;gap:10px;align-items:center}.slide-dot{width:24px;height:4px;padding:0;border:0;background:#ffffff60;position:relative}.slide-dot:before{content:'';position:absolute;inset:-14px -2px}.slide-dot.is-active{background:var(--green)}.slide-count{font-size:11px;letter-spacing:2px;margin-left:16px;color:#d2d9d4}.slide-arrow{width:42px;height:42px;border:1px solid #ffffff80;background:transparent;color:white;font-size:21px;margin-left:7px}.slide-arrow:hover{background:var(--green);color:#16210a;border-color:var(--green)}.section-title{text-align:center;margin-bottom:40px}.section-title h2{font-size:32px;text-transform:uppercase;letter-spacing:-.8px;margin-bottom:18px}.section-title img{margin:auto;max-width:240px;height:auto}.service-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}.service-card{display:block;min-width:0}.service-photo{position:relative;overflow:hidden;background:#e7ece2;aspect-ratio:1/1.08}.service-photo>img{width:100%;height:100%;object-fit:cover;transition:transform .4s}.service-overlay{position:absolute;inset:0;background:rgba(78,150,0,.93);color:white;display:flex;flex-direction:column;justify-content:center;padding:32px;opacity:0;transition:opacity .2s}.service-overlay p{font-size:15px}.service-overlay>span{font-weight:bold;font-size:14px}.service-card:hover .service-overlay,.service-card:focus-visible .service-overlay{opacity:1}.service-card:hover .service-photo>img{transform:scale(1.025)}.service-card h3{display:flex;align-items:center;justify-content:space-between;font-size:24px;padding:21px 0 16px;margin:0;border-bottom:1px solid var(--line)}.service-card h3 span{color:var(--green-dark);font-size:20px}.service-card:hover h3{color:var(--green-dark)}.page-heading{background:var(--paper);padding:46px 0 44px;border-bottom:1px solid var(--line)}.page-heading h1{margin-bottom:12px}.page-heading p:not(.eyebrow){color:var(--muted);max-width:700px}.page-heading .eyebrow{margin-bottom:12px}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:24px}.breadcrumbs a:hover{color:var(--green-dark);text-decoration:underline}.about-layout{display:grid;grid-template-columns: .85fr 1.15fr;gap:70px;align-items:start}.about-image img{width:100%;max-height:590px;object-fit:cover}.values>section{display:flex;gap:23px;border-bottom:1px solid var(--line);padding-bottom:28px;margin-bottom:28px}.number{font-size:14px;color:var(--green-dark);font-weight:700;padding-top:6px}.values h2{font-size:26px;margin-bottom:14px}.values p{color:#545950}.text-link{font-size:14px;color:var(--green-dark);font-weight:700;display:inline-flex;gap:24px;align-items:center}.text-link:hover{text-decoration:underline}.service-intro{margin-top:72px;border-top:1px solid var(--line);padding-top:52px;max-width:880px}.service-detail{display:grid;grid-template-columns: .9fr 1.1fr;gap:70px;align-items:start}.service-detail-photo{width:100%;max-height:570px;object-fit:cover}.service-detail .button{margin-top:24px}.related-services{padding-top:0}.related-services>.service-grid{grid-template-columns:repeat(2,minmax(0,1fr));max-width:760px}.related-services>h2{margin-bottom:28px}.related-services .service-photo{aspect-ratio:1.35}.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:44px 28px}.article-card{border:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.article-cover{display:flex;align-items:center;justify-content:center;background:var(--paper);height:210px;overflow:hidden;border-bottom:1px solid var(--line);padding:15px}.article-cover img{width:100%;height:100%;object-fit:contain}.document-symbol{font-size:100px;color:var(--green-dark);font-weight:normal;line-height:1}.article-card-content{padding:26px;display:flex;flex-direction:column;flex:1}.article-card .eyebrow{font-size:10px;letter-spacing:1.5px;margin-bottom:12px}.article-card h2{font-size:21px;line-height:1.4;letter-spacing:-.3px}.article-card h2 a:hover{color:var(--green-dark)}.article-card p:not(.eyebrow){font-size:14px;color:var(--muted)}.article-card .text-link{margin-top:auto;padding-top:12px}.library-search{max-width:560px;margin:0 0 40px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:72px}.article-body{min-width:0}.article-body h1{font-size:36px;line-height:1.35;letter-spacing:-.8px;margin-bottom:24px}.article-date{font-size:13px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:24px}.prose{font-size:16px;line-height:1.95;overflow-wrap:anywhere}.prose p{margin-bottom:23px}.prose h2{font-size:25px;line-height:1.4;margin:36px 0 18px}.prose img{height:auto;max-width:100%;margin-inline:auto}.prose figure{margin:28px 0;max-width:100%;overflow-x:auto}.prose figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}.prose ul,.prose ol{padding-left:24px;margin-block:22px}.prose li{margin-bottom:9px}.prose a{color:var(--green-dark);text-decoration:underline}.prose table{width:100%;border-collapse:collapse;font-size:14px}.prose td,.prose th{padding:10px 14px;border:1px solid var(--line);vertical-align:top}.prose tr:first-child{background:var(--paper)}.prose blockquote{border-left:3px solid var(--green);margin:24px 0;padding:8px 24px;background:var(--paper)}.missing-illustration{display:block;font-size:12px;color:#73766f;padding:14px;border:1px dashed var(--line);text-align:center}.video-link{display:block;background:var(--paper);padding:20px;margin:24px 0}.back-link{border-top:1px solid var(--line);padding-top:30px;margin-top:40px}.article-sidebar section{background:var(--paper);padding:26px;margin-bottom:24px;border-top:3px solid var(--green)}.article-sidebar h2{font-size:23px;line-height:1.4}.article-sidebar p{font-size:14px;color:var(--muted)}.article-sidebar .eyebrow{color:var(--green-dark)}.article-sidebar .button{width:100%;justify-content:center;gap:15px}.newsletter label{font-size:13px}.newsletter input{margin:6px 0 16px;width:100%}.newsletter .form-note{margin-top:14px}.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:90px}.contact-details h2{font-size:34px;margin-bottom:25px;line-height:1.3}.contact-details>p{font-size:14px;font-weight:bold;max-width:380px}.contact-details dl{margin:32px 0}.contact-details dt{font-size:12px;color:var(--muted);letter-spacing:1px;text-transform:uppercase;margin:22px 0 6px}.contact-details dd{margin:0;max-width:400px;overflow-wrap:anywhere}.contact-details dd a:hover{color:var(--green-dark)}.contact-panel{border:1px solid var(--line);padding:36px}.contact-panel h2{font-size:26px}.contact-panel>.muted{font-size:13px}.contact-form{display:flex;flex-direction:column}.contact-form label{font-size:14px;font-weight:bold;margin:0 0 7px}.contact-form input,.contact-form textarea{margin-bottom:21px}.contact-form textarea{resize:vertical;min-height:130px}.contact-form button{align-self:flex-start}.form-note{font-size:12px!important;color:var(--muted)}input,textarea{min-width:0;border:1px solid #cdd2c7;background:white;padding:11px 13px;border-radius:0;color:var(--ink)}input:focus,textarea:focus{border-color:var(--green-dark)}.honeypot{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.form-message{padding:16px;margin-bottom:24px;font-size:14px;border-left:3px solid var(--green-dark);background:#eef7e5}.form-message.error{background:#fff1ed;border-color:#b44724}.form-message.notice{background:#edf6fb;border-color:#2582b4}.site-footer{background:var(--dark);color:#d5d5d1}.footer-grid{display:grid;grid-template-columns:1.5fr .85fr 1fr;gap:70px;padding-block:48px 40px}.site-footer h2{color:var(--green);font-size:22px;letter-spacing:0;padding-bottom:13px;margin-bottom:20px;border-bottom:1px solid #456328}.site-footer p{font-size:13px;line-height:1.95;margin-bottom:17px}.site-footer a:hover{color:var(--green)}.company-name{font-weight:bold;color:white;font-size:13px!important;line-height:1.8!important}.footer-services>a{display:flex;justify-content:space-between;font-size:14px;padding:8px 0;border-bottom:1px solid #ffffff12}.search-form{display:flex;gap:0}.search-form input{width:100%;flex:1}.search-form button{border:1px solid var(--green);background:var(--green);color:#172308;font-weight:bold;padding:10px 18px;white-space:nowrap}.search-form button:hover{background:#7bd215}.site-footer .search-form input{background:transparent;border-color:#696d62;color:white;font-size:13px}.site-footer input::placeholder{color:#b4b7ae}.site-footer .footer-hours{margin-top:20px;color:#a4a69f}.footer-bottom{border-top:1px solid #ffffff20;display:flex;justify-content:space-between;gap:20px;padding:20px 0}.footer-bottom p,.footer-bottom a{font-size:11px;margin:0;color:#9c9f96}.zalo-button{position:fixed;right:22px;bottom:24px;background:#1599ee;box-shadow:0 0 0 7px #47b8ff30,0 4px 16px #0002;border-radius:50%;width:55px;height:55px;display:flex;align-items:center;justify-content:center;z-index:5}.zalo-button:hover{background:#0879c2}.zalo-button img{width:39px;height:auto}.narrow{max-width:850px;min-height:450px}.search-large{margin-bottom:30px}.search-result{padding:25px 0;border-bottom:1px solid var(--line)}.search-result h2{font-size:25px}.search-result p{color:var(--muted);font-size:15px}.search-result .eyebrow{font-size:11px;color:var(--green-dark);margin-bottom:10px}.search-result a:hover{color:var(--green-dark)}.empty-state{text-align:center;min-height:470px;padding-block:110px}.empty-state .button{margin-top:15px}
@media(min-width:1500px){.hero-slide{min-height:600px}}
@media(max-width:1050px){.nav-wrap{gap:22px}.nav-wrap nav{gap:24px}.brand{flex-basis:200px}.brand img{width:200px}.topbar-inner{justify-content:center;gap:22px}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{gap:36px;grid-template-columns:minmax(0,1fr) 250px}.footer-grid{gap:35px}.about-layout,.service-detail{gap:40px}.contact-layout{gap:40px}.service-card h3{font-size:21px}.service-overlay{padding:22px}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.topbar-inner{justify-content:space-between;min-height:38px;gap:8px;font-size:10px}.topbar-inner .hours{display:none}.topbar-inner span[aria-hidden]{font-size:13px;margin-right:2px}.nav-wrap{min-height:87px;flex-wrap:wrap;gap:0}.brand{flex-basis:197px}.brand img{width:197px}.menu-toggle{display:block;font-size:12px}.menu-toggle span{font-size:17px;margin-right:6px}.nav-wrap nav{display:none;flex-basis:100%;flex-direction:column;gap:0;align-items:stretch;padding:4px 0 20px}.nav-wrap nav.is-open{display:flex}.nav-wrap nav a{padding:12px 0;border-top:1px solid #ffffff16}.nav-wrap nav a[aria-current]::after{display:none}.section{padding-block:50px}.hero-slide{min-height:525px}.hero-content{padding-block:48px 100px}.hero h1,.hero h2{font-size:42px;letter-spacing:-1.2px}.hero-content>p:not(.eyebrow){font-size:15px;max-width:500px}.hero-content .eyebrow{font-size:10px;letter-spacing:1.6px}.hero-shade{background:linear-gradient(90deg,#102019ed,#10201990)}.hero-controls{bottom:22px}.section-title{margin-bottom:30px}.section-title h2{font-size:26px}.service-grid{gap:22px}.service-card h3{font-size:18px;line-height:1.35;padding:14px 0}.service-card h3 span{display:none}.service-photo{aspect-ratio: .75}.service-overlay{display:none}.page-heading{padding-block:34px}.page-heading h1{font-size:34px;letter-spacing:-.7px}.page-heading p:not(.eyebrow){font-size:14px}.about-layout,.service-detail,.contact-layout,.article-layout{grid-template-columns:1fr;gap:36px}.about-image img{max-height:380px;object-fit:contain;background:var(--paper)}.values h2{font-size:25px}.values>section{gap:18px}.service-detail-photo{max-height:430px;width:auto;margin:auto}.service-detail .eyebrow{margin-top:0}.service-intro{margin-top:46px;padding-top:40px}.related-services{padding-top:0}.article-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:20px}.article-sidebar section{margin:0}.article-body h1{font-size:30px}.article-card-content{padding:22px}.article-card h2{font-size:20px}.article-cover{height:180px}.contact-details h2{font-size:30px}.contact-details dl{display:grid;grid-template-columns:100px 1fr;gap:15px 20px}.contact-details dt,.contact-details dd{margin:0}.contact-panel{padding:26px}.footer-grid{grid-template-columns:1.2fr 1fr;gap:30px;padding-block:38px}.company-info{grid-column:1/-1;max-width:550px}.site-footer h2{font-size:20px}.footer-bottom{padding-bottom:35px}.footer-bottom a{padding-right:25px}.zalo-button{right:16px;bottom:18px;width:48px;height:48px}.zalo-button img{width:34px}}
@media(max-width:480px){.wrap{width:calc(100% - 36px)}.hero h1,.hero h2{font-size:36px}.hero-slide{min-height:530px}.hero-content>p:not(.eyebrow){font-size:14px}.service-grid{grid-template-columns:1fr;gap:30px}.service-photo{aspect-ratio:1.18}.service-card h3{font-size:24px}.service-card h3 span{display:block}.service-grid .service-photo>img{object-position:center 42%}.article-grid,.article-sidebar{grid-template-columns:1fr}.article-cover{height:225px}.article-card h2{font-size:22px}.article-layout{padding-top:32px}.article-body h1{font-size:28px}.prose{font-size:15px}.prose h2{font-size:23px}.related-services>.service-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:28px}.company-info{grid-column:auto}.footer-bottom{flex-direction:column;gap:8px}.site-footer h2{margin-bottom:15px}.footer-services{display:none}.contact-details dl{grid-template-columns:1fr;gap:5px}.contact-details dt{margin-top:15px}.contact-panel{padding:22px}.search-form button{padding-inline:14px}.service-intro .prose img{max-height:360px;object-fit:contain}.empty-state{padding-block:75px}.eyebrow{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}
@media print{.site-header,.site-footer,.zalo-button,.article-sidebar,.back-link{display:none}.article-layout{display:block}.wrap{width:100%}.section{padding:0}.prose a{color:inherit}.article-body h1{font-size:26px}}

/* Original green/charcoal theme: spacing and legibility refinements only. */
.topbar-inner{font-size:12px;min-height:40px;font-weight:500}
.nav-wrap{min-height:88px}.brand{flex-basis:211px}.brand img{width:211px}
.nav-wrap nav a{padding-block:29px}.nav-wrap nav a[aria-current]::after{bottom:18px}
.hero-slide{min-height:410px}.hero-content{padding-block:55px 80px}
.hero h1,.hero h2{font-size:40px;line-height:1.2;letter-spacing:-.6px;margin-bottom:22px;color:white}
.hero-content>p:not(.eyebrow){max-width:570px;line-height:1.9;font-size:15px;margin-bottom:26px}
.hero-shade{background:linear-gradient(90deg,#171c18db,#171c1870 55%,#171c181a)}
.hero .button{border:1px solid #ffffffb3;background:transparent;color:white;padding:11px 21px}
.hero .button:hover{background:var(--green);border-color:var(--green);color:#152108}
.hero-controls{bottom:18px}.slide-arrow{border-radius:50%;width:36px;height:36px;font-size:18px}
.section{padding-block:62px}.section-title{margin-bottom:32px}.section-title h2{font-size:29px;letter-spacing:0}
.service-grid{gap:36px}.service-photo{border-radius:5px;aspect-ratio:1/1.04}
.service-card h3{justify-content:center;padding:18px 8px;border:0;font-size:24px;transition:background .2s,color .2s}
.service-card h3>span{display:none}.service-card:hover h3{background:var(--green);color:#172308}
.service-overlay{background:#66b900dc;padding:28px}.service-overlay p{line-height:1.9}
.site-footer h2{font-size:21px}.footer-grid{padding-block:38px;gap:48px}
.site-footer p{font-size:13px}.footer-bottom{padding-block:17px}
@media(max-width:1050px){.service-grid{gap:28px}.service-card h3{font-size:22px}}
@media(max-width:760px){.nav-wrap{min-height:82px}.brand{flex-basis:197px}.brand img{width:197px}.nav-wrap nav a{padding-block:12px}.topbar-inner{font-size:10px;min-height:34px}.hero-slide{min-height:380px}.hero-content{padding-block:40px 75px}.hero h1,.hero h2{font-size:34px}.hero-content>p:not(.eyebrow){font-size:14px;line-height:1.85}.section{padding-block:45px}.section-title h2{font-size:25px}.service-grid{gap:20px}.service-card h3{font-size:19px;padding-inline:0}.footer-grid{gap:28px}}
@media(max-width:480px){.hero-slide{min-height:430px}.hero-content{padding-top:35px}.hero h1,.hero h2{font-size:32px}.hero-content>p:not(.eyebrow){font-size:14px}.section-title h2{font-size:24px}.service-grid{gap:25px}.service-photo{aspect-ratio:1.12}.service-card h3{font-size:24px;padding:17px}.footer-grid{padding-block:32px}}

/* Preserve the existing emblem and wordmark, with the updated company identity. */
.brand-logo{display:block;position:relative}
.brand-logo img{clip-path:polygon(0 0,100% 0,100% 58%,34% 58%,34% 100%,0 100%)}
.brand-tagline{position:absolute;left:38.1%;right:0;top:60%;display:flex;justify-content:space-between;color:#fff;font:10px/1 Arial,Helvetica,sans-serif;white-space:nowrap}