/* Trung tâm Thiết kế số Thăng Long — bố cục: nền xanh than kiểu bản vẽ kỹ thuật, cam làm điểm nhấn, khối nội dung sáng xen kẽ */
:root{
  color-scheme:light;
  --navy-950:#070E1A; --navy-900:#0A1322; --navy-800:#101C30; --navy-700:#18283F; --navy-600:#243652;
  --orange:#F26A1B; --orange-600:#D8570C; --orange-300:#FFB07C; --orange-050:#FFF1E7;
  --cyan:#3CC4D9;
  --paper:#F6F4F1; --card:#FFFFFF; --ink:#131B28; --muted:#5A6577; --rule:#E2DED8;
  --on-dark:#E9EEF6; --on-dark-muted:#9BABC2; --line-dark:rgba(150,180,220,.16);
  --font: "Be Vietnam Pro", "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.65;color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:inherit}
h1,h2,h3,h4{line-height:1.2;margin:0;text-wrap:balance;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.mono{font-family:var(--mono)}
.eyebrow{font-family:var(--mono);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:var(--orange);display:flex;align-items:center;gap:.6em}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor}

/* Header */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--navy-900)}
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:rgba(10,19,34,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-dark);color:var(--on-dark)}
.site-header .wrap{display:flex;align-items:center;gap:24px;min-height:68px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:#fff;min-width:0}
.brand svg{flex:none;width:40px;height:40px}
.brand img{flex:none;height:42px;width:auto;border-radius:4px}
.brand-name{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name b{font-size:.98rem;letter-spacing:.02em}
.brand-name span{font-family:var(--mono);font-size:.66rem;letter-spacing:.12em;color:var(--on-dark-muted);text-transform:uppercase}
.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav a{text-decoration:none;color:var(--on-dark-muted);font-size:.92rem;font-weight:500;padding:8px 12px;border-radius:6px;position:relative;transition:color .15s}
.nav a:hover{color:#fff}
.nav a[aria-current="page"]{color:#fff}
.nav a[aria-current="page"]::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--orange)}
.nav a.nav-cta{color:#fff;background:var(--orange);margin-left:10px;padding:9px 16px}
.nav a.nav-cta:hover{background:var(--orange-600)}
.nav a.nav-cta::after{display:none}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line-dark);color:#fff;border-radius:6px;width:42px;height:42px;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;margin:4px auto}
@media (max-width:920px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--navy-900);border-bottom:1px solid var(--line-dark);flex-direction:column;align-items:stretch;padding:10px max(20px,env(safe-area-inset-right,0px)) 18px max(20px,env(safe-area-inset-left,0px));gap:0}
  .nav.open{display:flex}
  .nav a{padding:13px 4px;border-bottom:1px solid var(--line-dark);border-radius:0}
  .nav a[aria-current="page"]::after{left:0;right:auto;width:3px;height:auto;top:12px;bottom:12px;margin-left:-10px}
  .nav a.nav-cta{margin:14px 0 0;text-align:center;border-radius:6px;border:0}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.6em;font:inherit;font-weight:600;font-size:.95rem;text-decoration:none;padding:12px 20px;border-radius:6px;border:1px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,color .15s}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-600)}
.btn-ghost{border-color:rgba(255,255,255,.28);color:#fff;background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:#fff}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-line:hover{background:var(--ink);color:#fff}
.arrow::after{content:"→";transition:transform .15s}
.arrow:hover::after{transform:translateX(3px)}

/* Dark surfaces + blueprint grid */
.dark{background:var(--navy-900);color:var(--on-dark);position:relative;isolation:isolate}
.dark::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(var(--line-dark) 1px,transparent 1px),linear-gradient(90deg,var(--line-dark) 1px,transparent 1px);
  background-size:64px 64px;mask-image:linear-gradient(180deg,rgba(0,0,0,.55),rgba(0,0,0,.08))}
.dark p{color:var(--on-dark-muted)}

/* Home hero */
.hero{overflow:hidden;background:radial-gradient(1100px 620px at 68% 42%,#17325A 0%,var(--navy-900) 62%,var(--navy-950) 100%)}
.hero-stage{position:relative;height:clamp(600px,82vh,800px)}
#bridge{position:absolute;inset:0;touch-action:pan-y}
#bridge canvas{display:block;width:100%;height:100%}
.hero-copy{position:absolute;left:0;right:0;top:0;padding-top:clamp(28px,6vh,64px);pointer-events:none}
.hero-copy .inner{max-width:560px;display:flex;flex-direction:column;gap:18px}
.hero-copy a,.hero-copy button{pointer-events:auto}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.6rem);font-weight:800;color:#fff;letter-spacing:-.025em}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero-copy p{font-size:1.05rem;max-width:46ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.bim-panel{position:absolute;right:max(20px,calc((100vw - var(--wrap))/2 + 20px));bottom:92px;width:340px;max-width:calc(100% - 40px);background:rgba(10,19,34,.82);backdrop-filter:blur(12px);border:1px solid var(--line-dark);border-top:2px solid var(--orange);border-radius:4px;padding:18px 20px 20px;color:var(--on-dark)}
.bim-panel .tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan)}
.bim-panel h2{font-size:1.25rem;margin:6px 0 10px;color:#fff}
.bim-panel p{font-size:.88rem;line-height:1.55}
.bim-props{display:grid;grid-template-columns:auto 1fr;gap:5px 14px;margin:14px 0;padding:12px 0;border-block:1px solid var(--line-dark);font-size:.8rem}
.bim-props dt{font-family:var(--mono);color:var(--on-dark-muted);font-size:.72rem;letter-spacing:.04em}
.bim-props dd{margin:0;color:#fff;font-family:var(--mono);font-size:.76rem;overflow-wrap:anywhere}
.bim-panel a.more{color:var(--orange-300);font-size:.86rem;font-weight:600;text-decoration:none}
.bim-panel a.more:hover{text-decoration:underline}
.bim-note{font-size:.7rem;color:var(--on-dark-muted);margin-top:10px;font-family:var(--mono)}
.bim-bar{position:absolute;left:0;right:0;bottom:0;border-top:1px solid var(--line-dark);background:linear-gradient(180deg,rgba(7,14,26,0),rgba(7,14,26,.85))}
.bim-bar .wrap{display:flex;align-items:center;gap:14px;padding-block:14px}
.bim-bar .lbl{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--on-dark-muted);flex:none}
.chips{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;flex:1;min-width:0;padding:2px}
.chips::-webkit-scrollbar{display:none}
.chip{flex:none;font:inherit;font-size:.8rem;color:var(--on-dark);background:rgba(255,255,255,.04);border:1px solid var(--line-dark);border-radius:999px;padding:6px 13px;cursor:pointer;transition:all .15s}
.chip:hover{border-color:var(--orange-300)}
.chip[aria-pressed="true"]{background:var(--orange);border-color:var(--orange);color:#fff}
.view-tools{display:flex;gap:6px;flex:none}
.view-tools button{width:34px;height:34px;border-radius:6px;border:1px solid var(--line-dark);background:rgba(255,255,255,.04);color:#fff;font-size:1rem;cursor:pointer}
.view-tools button:hover{border-color:var(--orange-300)}
#bim-tip{position:absolute;pointer-events:none;background:var(--orange);color:#fff;font-size:.74rem;font-weight:600;padding:4px 9px;border-radius:3px;transform:translate(14px,14px);white-space:nowrap;z-index:5}
.hint{font-family:var(--mono);font-size:.72rem;color:var(--on-dark-muted);display:flex;align-items:center;gap:8px}
.hint i{width:8px;height:8px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px rgba(242,106,27,.25)}
@media (prefers-reduced-motion:no-preference){.hint i{animation:pulse 1.8s infinite}}
@keyframes pulse{50%{box-shadow:0 0 0 8px rgba(242,106,27,0)}}
@media (max-width:920px){
  .hero-stage{height:auto;display:flex;flex-direction:column}
  .hero-copy{position:static;padding-bottom:8px}
  #bridge{position:relative;inset:auto;height:360px;order:2}
  .bim-bar{position:static;order:3;background:none}
  .bim-bar .lbl{display:none}
  .bim-panel{position:static;order:4;width:auto;max-width:none;margin:4px 20px 28px}
}

@media (min-width:921px){.hero-copy{bottom:0;background:linear-gradient(90deg,rgba(8,15,28,.92) 0%,rgba(8,15,28,.7) 30%,rgba(8,15,28,0) 56%)}}
/* Stats strip */
.stats{background:var(--navy-950);color:#fff;border-top:1px solid var(--line-dark)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:28px 20px 28px 0;border-right:1px solid var(--line-dark)}
.stat+.stat{padding-left:28px}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:clamp(1.9rem,3.4vw,2.7rem);font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1.1}
.stat b sup{color:var(--orange);font-size:.55em;margin-left:2px}
.stat span{font-size:.86rem;color:var(--on-dark-muted)}
@media (max-width:760px){.stats .wrap{grid-template-columns:1fr 1fr}.stat{border-bottom:1px solid var(--line-dark);padding:22px 12px 22px 0}.stat+.stat{padding-left:0}.stat:nth-child(even){padding-left:20px;border-right:0}.stat:nth-last-child(-n+2){border-bottom:0}}

/* Sections */
.sec{padding-block:clamp(56px,8vw,104px)}
.sec-head{display:flex;flex-direction:column;gap:14px;max-width:720px;margin-bottom:clamp(30px,4vw,52px)}
.sec-head h2{font-size:clamp(1.65rem,3vw,2.4rem);font-weight:800;letter-spacing:-.02em}
.sec-head p{color:var(--muted);font-size:1.04rem}
.dark .sec-head h2{color:#fff}
.sec-head.row{flex-direction:row;align-items:flex-end;justify-content:space-between;max-width:none;gap:24px;flex-wrap:wrap}
.sec-head.row>div{display:flex;flex-direction:column;gap:14px;max-width:720px}
.white{background:var(--card)}

/* Service cards */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}
.svc{background:var(--card);padding:32px 28px 30px;display:flex;flex-direction:column;gap:14px;text-decoration:none;color:inherit;transition:background .2s;min-width:0}
a.svc:hover{background:var(--orange-050)}
.svc .ico{width:46px;height:46px;color:var(--orange)}
.svc h3{font-size:1.25rem}
.svc p{color:var(--muted);font-size:.95rem}
.svc ul{display:flex;flex-direction:column;gap:7px;font-size:.9rem;margin-top:4px}
.svc li{padding-left:18px;position:relative}
.svc li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:2px;background:var(--orange)}
.svc .go{margin-top:auto;padding-top:10px;font-weight:600;font-size:.9rem;color:var(--orange-600)}
@media (max-width:920px){.svc-grid{grid-template-columns:1fr}}

/* Why us */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.why>div{border-top:1px solid var(--line-dark);padding-top:22px;display:flex;flex-direction:column;gap:10px;min-width:0}
.why .k{font-family:var(--mono);font-size:.72rem;color:var(--orange);letter-spacing:.1em;text-transform:uppercase}
.why h3{font-size:1.15rem;color:#fff}
.why p{font-size:.94rem}
.paper .why>div{border-color:var(--rule)}
.paper .why h3{color:var(--ink)}.paper .why p{color:var(--muted)}
@media (max-width:820px){.why{grid-template-columns:1fr}}

/* Project cards */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px}
.filters button{font:inherit;font-size:.88rem;font-weight:500;padding:8px 16px;border-radius:999px;border:1px solid var(--rule);background:var(--card);color:var(--ink);cursor:pointer}
.filters button:hover{border-color:var(--orange)}
.filters button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.proj-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:22px}
.proj{background:var(--card);border:1px solid var(--rule);border-radius:4px;overflow:hidden;display:flex;flex-direction:column;min-width:0;transition:transform .2s,box-shadow .2s,border-color .2s}
.proj:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(16,28,48,.12);border-color:var(--orange-300)}
.proj .thumb{aspect-ratio:16/10;background:var(--navy-800);position:relative;overflow:hidden}
.proj .thumb svg{position:absolute;inset:0;width:100%;height:100%}
.proj .no{position:absolute;left:12px;top:10px;font-family:var(--mono);font-size:.7rem;color:var(--on-dark-muted);letter-spacing:.1em}
.proj .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.proj .cat{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--orange-600)}
.proj h3{font-size:1.08rem}
.proj a{margin-top:auto;padding-top:8px;font-size:.88rem;font-weight:600;color:var(--ink);text-decoration:none}
.proj a:hover{color:var(--orange-600)}
.dark .proj{background:var(--navy-800);border-color:var(--line-dark)}
.dark .proj h3{color:#fff}.dark .proj a{color:var(--orange-300)}

/* News */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news{display:flex;flex-direction:column;gap:10px;padding-top:20px;border-top:2px solid var(--ink);min-width:0;text-decoration:none;color:inherit}
.news .meta{font-family:var(--mono);font-size:.72rem;color:var(--muted);letter-spacing:.06em;display:flex;gap:12px;flex-wrap:wrap}
.news .meta b{color:var(--orange-600);font-weight:500;text-transform:uppercase}
.news h3{font-size:1.14rem;line-height:1.35;transition:color .15s}
a.news:hover h3{color:var(--orange-600)}
.news p{color:var(--muted);font-size:.93rem}
.news .go{font-size:.86rem;font-weight:600;color:var(--orange-600);margin-top:auto}
.news.lead{grid-column:span 2}
.news.lead h3{font-size:clamp(1.3rem,2.4vw,1.8rem)}
@media (max-width:920px){.news-grid{grid-template-columns:1fr}.news.lead{grid-column:auto}}
.linklist{display:flex;flex-direction:column}
.linklist a{display:flex;justify-content:space-between;gap:20px;align-items:baseline;padding:16px 0;border-bottom:1px solid var(--rule);text-decoration:none;font-weight:500}
.linklist a:hover{color:var(--orange-600)}
.linklist span{font-family:var(--mono);font-size:.74rem;color:var(--muted);flex:none}

/* Page hero (inner pages) */
.page-hero{padding-block:clamp(48px,7vw,88px)}
.page-hero .inner{display:flex;flex-direction:column;gap:16px;max-width:780px}
.page-hero h1{font-size:clamp(2rem,4.4vw,3.2rem);font-weight:800;color:#fff;letter-spacing:-.025em}
.page-hero p{font-size:1.08rem;max-width:60ch}
.crumb{font-family:var(--mono);font-size:.72rem;color:var(--on-dark-muted);letter-spacing:.08em}
.crumb a{text-decoration:none}.crumb a:hover{color:#fff}

/* Two-column prose */
.split{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,5vw,72px);align-items:start}
.split>*{min-width:0}
.prose{display:flex;flex-direction:column;gap:18px;max-width:68ch}
.prose p{color:#2B3443}
.prose h2{font-size:1.5rem;margin-top:10px}
.prose h3{font-size:1.15rem;margin-top:6px}
.prose ul{display:flex;flex-direction:column;gap:9px}
.prose li{padding-left:20px;position:relative}
.prose li::before{content:"";position:absolute;left:0;top:.7em;width:10px;height:2px;background:var(--orange)}
.prose a{color:var(--orange-600)}
@media (max-width:860px){.split{grid-template-columns:1fr}}
.vision{border-left:3px solid var(--orange);padding:6px 0 6px 26px;font-size:clamp(1.25rem,2.4vw,1.75rem);font-weight:600;line-height:1.4;color:#fff;max-width:26em}
.facts{display:grid;grid-template-columns:auto 1fr;gap:0;border-top:1px solid var(--rule)}
.facts dt,.facts dd{padding:14px 0;border-bottom:1px solid var(--rule);margin:0}
.facts dt{font-family:var(--mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding-right:28px}
.facts dd{font-weight:500}

/* Lifecycle */
.life{display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:s}
.life li{counter-increment:s;padding:22px 22px 6px 0;border-top:2px solid var(--orange);position:relative;margin-right:14px;display:flex;flex-direction:column;gap:8px}
.life li::before{content:"0" counter(s);font-family:var(--mono);font-size:.74rem;color:var(--orange);letter-spacing:.1em}
.life h3{font-size:1.05rem;color:#fff}
.life p{font-size:.9rem}
@media (max-width:820px){.life{grid-template-columns:1fr 1fr;row-gap:22px}}
@media (max-width:480px){.life{grid-template-columns:1fr}}

/* Service detail blocks */
.svc-block{display:grid;grid-template-columns:4fr 8fr;gap:clamp(24px,5vw,72px);padding-block:clamp(40px,5vw,64px);border-top:1px solid var(--rule)}
.svc-block>*{min-width:0}
.svc-block .left{display:flex;flex-direction:column;gap:14px}
.svc-block .num{font-family:var(--mono);color:var(--orange);font-size:.8rem;letter-spacing:.12em}
.svc-block h2{font-size:clamp(1.5rem,2.6vw,2rem)}
.svc-block .ico{width:56px;height:56px;color:var(--orange)}
.items{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:22px}
.items li{background:var(--card);padding:18px 20px;font-size:.95rem;font-weight:500}
.items li small{display:block;font-weight:400;color:var(--muted);font-size:.86rem;margin-top:4px}
@media (max-width:860px){.svc-block{grid-template-columns:1fr}.items{grid-template-columns:1fr}}
.tools{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tools span{font-family:var(--mono);font-size:.74rem;padding:5px 10px;border:1px solid var(--rule);border-radius:3px;background:var(--card)}

/* CTA */
.cta{background:var(--orange);color:#fff}
.cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;padding-block:clamp(40px,5vw,64px)}
.cta h2{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;max-width:20em}
.cta .btn{background:var(--navy-900);color:#fff}
.cta .btn:hover{background:#000}

/* Contact */
.contact{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,5vw,72px)}
.contact>*{min-width:0}
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px;background:var(--card);border:1px solid var(--rule);padding:clamp(20px,3vw,34px);border-radius:4px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:.84rem;font-weight:600}
.form .full{grid-column:1/-1}
.form input,.form select,.form textarea{font:inherit;padding:11px 12px;border:1px solid #CFCAC2;border-radius:4px;background:#fff;color:var(--ink);width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--orange);outline-offset:0;border-color:var(--orange)}
.form textarea{min-height:130px;resize:vertical}
.form .note{font-size:.84rem;color:var(--muted);font-weight:400}
#form-status{font-size:.9rem;font-weight:500;color:var(--orange-600)}
@media (max-width:860px){.contact{grid-template-columns:1fr}.form{grid-template-columns:1fr}}

/* Article */
.article{max-width:760px}
.article .meta{font-family:var(--mono);font-size:.76rem;color:var(--muted);letter-spacing:.06em;margin-bottom:22px}
.article .prose p{font-size:1.04rem}
.source{margin-top:34px;padding:18px 20px;background:var(--card);border:1px solid var(--rule);border-left:3px solid var(--orange);font-size:.92rem}
.source a{color:var(--orange-600);overflow-wrap:anywhere}

/* Footer */
.site-footer{background:var(--navy-950);color:var(--on-dark-muted);font-size:.9rem}
.site-footer .top{display:grid;grid-template-columns:5fr 2fr 2fr 3fr;gap:36px;padding-block:56px 40px}
.site-footer .top>*{min-width:0}
.site-footer h4{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:#fff;margin-bottom:14px;font-weight:500}
.site-footer ul{display:flex;flex-direction:column;gap:8px}
.site-footer a{text-decoration:none}.site-footer a:hover{color:#fff}
.site-footer .about{display:flex;flex-direction:column;gap:14px;max-width:38ch}
.site-footer .bottom{border-top:1px solid var(--line-dark);padding-block:18px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:var(--mono);font-size:.72rem}
@media (max-width:860px){.site-footer .top{grid-template-columns:1fr 1fr}.site-footer .about{grid-column:1/-1}}
@media (max-width:480px){.site-footer .top{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}}

/* === Giao diện sáng: nền trắng cho nội dung và menu; chỉ khung cầu 3D (kèm dải số liệu) và chân trang giữ nền xanh than === */
:root{--paper:#FFFFFF;--tint:#F5F3EF;--orange-text:#C2500A}
body::before{background:#fff}
.site-header{background:rgba(255,255,255,.95);border-bottom:1px solid var(--rule);color:var(--ink)}
.site-header .brand{color:var(--ink)}
.site-header .brand-name span{color:var(--muted)}
.site-header .nav a{color:var(--muted)}
.site-header .nav a:hover,.site-header .nav a[aria-current="page"]{color:var(--ink)}
.site-header .nav a.nav-cta,.site-header .nav a.nav-cta:hover{color:#fff}
.nav-toggle{border-color:var(--rule);color:var(--ink)}
@media (max-width:920px){.nav{background:#fff;border-bottom:1px solid var(--rule)}.site-header .nav a{border-bottom-color:var(--rule)}}
.eyebrow,.why .k,.life li::before{color:var(--orange-text)}
.dark{background:var(--tint);color:var(--ink)}
.dark::before{background-image:linear-gradient(rgba(19,27,40,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(19,27,40,.055) 1px,transparent 1px)}
.dark p{color:var(--muted)}
.dark .sec-head h2,.page-hero h1,.life h3,.why h3,.vision{color:var(--ink)}
.crumb{color:var(--muted)}.crumb a:hover{color:var(--ink)}
.why>div{border-color:var(--rule)}
.dark .proj{background:#fff;border-color:var(--rule)}.dark .proj h3,.dark .proj a{color:var(--ink)}.dark .proj a:hover{color:var(--orange-600)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.stats{background:var(--tint);color:var(--ink);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.stat{border-color:var(--rule)}.stat span{color:var(--muted)}
.page-hero{border-bottom:1px solid var(--rule)}
.sec:not(.dark)+.sec:not(.dark){border-top:1px solid var(--rule)}
/* Khung cầu 3D giữ nền tối */
.hero{background:radial-gradient(1100px 620px at 68% 42%,#17325A 0%,var(--navy-900) 62%,var(--navy-950) 100%);color:var(--on-dark)}
.hero::before{background-image:linear-gradient(var(--line-dark) 1px,transparent 1px),linear-gradient(90deg,var(--line-dark) 1px,transparent 1px)}
.hero p{color:var(--on-dark-muted)}
.hero .eyebrow{color:var(--orange)}
.hero .btn-ghost{border-color:rgba(255,255,255,.28);color:#fff;background:rgba(255,255,255,.03)}
.hero .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff}
.hero+.stats{background:var(--navy-950);color:#fff;border-color:var(--line-dark)}
.hero+.stats .stat{border-color:var(--line-dark)}.hero+.stats .stat span{color:var(--on-dark-muted)}
.dark p.vision{color:var(--ink)}