:root{--ink:#0b2b33;--brand:#0e6f63;--brand-d:#0a574d;--tx:#1b2a2e;--mut:#566a70;--line:#dde4e6;--alt:#f3f6f7;--card:#fff;--ok:#0a7a4b;--bad:#b3261e;--r:6px;
--cjk:'Hiragino Sans','Yu Gothic UI','Meiryo','Noto Sans JP','PingFang SC','Microsoft YaHei','Noto Sans SC','Malgun Gothic','Noto Sans KR';
--f:'Inter',var(--cjk),'Segoe UI',system-ui,-apple-system,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px;color-scheme:light}
body{margin:0;font:400 16px/1.7 var(--f);background:#fff;color:var(--tx);-webkit-font-smoothing:antialiased;overflow-x:hidden}
:lang(ja) body,:lang(zh) body,:lang(ko) body{line-height:1.9}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}.narrow{max-width:860px}
a{color:var(--brand);text-underline-offset:3px}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #f0b13e;outline-offset:2px}
.skip{position:absolute;left:-999px;top:8px;background:#fff;color:var(--ink);padding:10px 16px;border-radius:var(--r);font-weight:600;z-index:100;border:2px solid var(--brand)}.skip:focus{left:12px}
h1,h2,h3{font-weight:700;line-height:1.25;letter-spacing:-.015em;margin:0 0 .5em;color:var(--ink);text-wrap:balance}
:lang(ja) h1,:lang(ja) h2,:lang(ja) h3,:lang(zh) h1,:lang(zh) h2,:lang(zh) h3,:lang(ko) h1,:lang(ko) h2,:lang(ko) h3{letter-spacing:0;line-height:1.45}
h2{font-size:clamp(1.55rem,3vw,2.1rem)}h3{font-size:1.05rem;letter-spacing:-.005em;line-height:1.4}
p{text-wrap:pretty}
.muted{color:var(--mut)}.sub{color:var(--mut);max-width:66ch;margin:0 0 28px;font-size:1.04rem}

.topbar{background:var(--ink);color:#c3d6d8;font-size:13px}
.topbar .wrap{display:flex;justify-content:flex-end;gap:22px;min-height:36px;align-items:center}
.topbar a{color:#e6f1f2;text-decoration:none}.topbar a:hover{text-decoration:underline}
.top{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s}
.top.scrolled{box-shadow:0 2px 14px rgba(11,43,51,.1)}
.bar{display:flex;align-items:center;gap:18px;min-height:70px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700;font-size:1.05rem;letter-spacing:-.01em;white-space:nowrap}
#nav{display:flex;gap:2px;margin-left:auto;align-items:center}
#nav a{position:relative;color:#33474c;text-decoration:none;font-size:14.5px;font-weight:500;padding:10px 11px;white-space:nowrap;transition:color .15s}
#nav a::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;background:var(--brand);transform:scaleX(0);transition:transform .2s}
#nav a:hover{color:var(--brand)}#nav a:hover::after,#nav a[aria-current=page]::after{transform:scaleX(1)}
#nav a[aria-current=page]{color:var(--brand);font-weight:600}
.right{display:flex;align-items:center;gap:12px}
.burger{display:none;background:#fff;border:1px solid var(--line);color:var(--ink);border-radius:var(--r);font-size:20px;line-height:1;cursor:pointer}
.langsel{position:relative}
.langsel summary{list-style:none;cursor:pointer;color:#33474c;font-size:14px;font-weight:600;padding:8px 12px;border:1px solid var(--line);border-radius:var(--r);white-space:nowrap;transition:border-color .15s}
.langsel summary:hover,.langsel[open] summary{border-color:var(--brand)}
.langsel summary::-webkit-details-marker{display:none}
.langsel summary::after{content:"";display:inline-block;width:6px;height:6px;margin:0 0 3px 8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg)}
.langsel[open] summary::after{transform:rotate(-135deg);margin-bottom:-2px}
.langsel div{position:absolute;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:4px;min-width:140px;box-shadow:0 12px 30px rgba(11,43,51,.15)}
.langsel div a{display:block;color:var(--tx);text-decoration:none;padding:9px 12px;border-radius:4px;font-size:14.5px}
.langsel div a:hover{background:var(--alt)}

.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;border:1px solid var(--brand);border-radius:var(--r);padding:13px 26px;font:600 15px/1.2 var(--f);text-decoration:none;cursor:pointer;transition:background .15s,border-color .15s,color .15s,box-shadow .15s,transform .1s}
.btn:hover{background:var(--brand-d);border-color:var(--brand-d);box-shadow:0 4px 12px rgba(10,87,77,.28)}
.btn:active{transform:translateY(1px);box-shadow:none}
.btn.sm{padding:9px 18px;font-size:14px;white-space:nowrap}
.btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn.ghost:hover{background:#fff;color:var(--ink);border-color:#fff;box-shadow:none}
.btn[disabled]{opacity:.65;cursor:wait;transform:none;box-shadow:none}

/* ảnh bìa: ảnh thật Tràng An, phủ tối bên trái để chữ dễ đọc */
.hero{position:relative;color:#fff;background:linear-gradient(90deg,rgba(8,30,36,.9) 0%,rgba(8,30,36,.66) 52%,rgba(8,30,36,.3) 100%),var(--hero-img,none) center/cover no-repeat,var(--ink);padding:clamp(64px,10vw,128px) 0 clamp(64px,9vw,112px)}
.hero .wrap{position:relative}
.eyebrow{margin:0 0 14px;color:#b9dad5;font-size:15px;font-weight:600}
.hero h1{font-size:clamp(2rem,4.8vw,3.4rem);max-width:20ch;color:#fff;font-weight:800;letter-spacing:-.025em;line-height:1.12;margin-bottom:.5em}
:lang(ja) .hero h1,:lang(zh) .hero h1,:lang(ko) .hero h1{max-width:26ch;font-size:clamp(1.8rem,4.2vw,2.9rem);font-weight:700}
.lead{font-size:clamp(1.02rem,1.5vw,1.16rem);color:#e0ecee;max-width:60ch;margin:0 0 30px;line-height:1.75}
.cta{display:flex;flex-wrap:wrap;gap:12px}
.hero.sm{padding:clamp(48px,6.5vw,84px) 0 clamp(48px,6vw,76px)}
.hero.sm h1{font-size:clamp(1.8rem,3.8vw,2.6rem);max-width:26ch}
.hero.sm .lead{margin-bottom:0}
.hero.sm .cta{margin-top:26px}

.statband{border-bottom:1px solid var(--line);background:#fff}
.stats{display:grid;grid-template-columns:repeat(4,1fr);margin:0;padding:0}
.stats>div{padding:26px 24px 24px 24px;border-right:1px solid var(--line)}.stats>div:first-child{padding-left:0}.stats>div:last-child{border-right:0}
.stats dt{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:800;color:var(--brand);line-height:1.15;letter-spacing:-.02em}
.stats dd{margin:5px 0 0;color:var(--mut);font-size:14px;line-height:1.5}
.sec .stats{border:1px solid var(--line);border-radius:var(--r);background:#fff;margin:0 0 8px}
.sec .stats>div{padding:20px 22px}.sec .stats>div:first-child{padding-left:22px}

.sec{padding:clamp(48px,6.5vw,84px) 0}
.sec.alt{background:var(--alt)}
.sec h2{max-width:26ch}.narrow h2,.blk h2{max-width:none}
.topics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.cards4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.cards2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px 22px 20px}
.card h3{margin-bottom:.4em}.card p{margin:0;color:var(--mut);font-size:15px;line-height:1.65}
.ic{display:block;width:30px;height:30px;color:var(--brand);margin-bottom:14px}
.ic svg{width:30px;height:30px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.topic{display:block;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
.topic:hover{border-color:var(--brand);box-shadow:0 6px 20px rgba(11,43,51,.1)}
.topic h3{color:var(--ink)}
.cards3.ctx>.card{border-top:3px solid var(--brand)}
.more{display:inline-flex;align-items:center;margin-top:14px;font-weight:600;color:var(--brand);text-decoration:none}
.more::after{content:"";width:.42em;height:.42em;margin-left:.55em;border-right:2px solid currentColor;border-top:2px solid currentColor;transform:rotate(45deg);transition:transform .15s}
.more:hover::after{transform:translateX(3px) rotate(45deg)}
.proj{display:flex;gap:12px;align-items:flex-start}.proj .ic{margin:2px 0 0;flex:none;width:24px;height:24px}.proj .ic svg{width:24px;height:24px}.proj h3{margin:0 0 2px}

/* quy trình: chuỗi bước thật nên đánh số */
.steps{list-style:none;margin:0;padding:0;counter-reset:s;position:relative}
.steps::before{content:"";position:absolute;left:17px;top:8px;bottom:8px;width:2px;background:var(--line)}
.steps li{counter-increment:s;position:relative;display:grid;gap:2px;padding:0 0 24px 58px}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font:700 15px var(--f);box-shadow:0 0 0 5px #fff}
.sec.alt .steps li::before{box-shadow:0 0 0 5px var(--alt)}
.steps strong{font-size:1.05rem;color:var(--ink)}.steps span{color:var(--mut)}

.blk{margin:0 0 42px}.blk h2{font-size:clamp(1.3rem,2.3vw,1.65rem)}
.blk p{max-width:70ch}
.ticks{list-style:none;margin:0 0 14px;padding:0}
.ticks li{position:relative;padding:9px 0 9px 30px;border-bottom:1px solid var(--line);max-width:78ch}
.ticks li::before{content:"";position:absolute;left:4px;top:1.1em;width:12px;height:7px;border-left:2.5px solid var(--brand);border-bottom:2.5px solid var(--brand);transform:rotate(-45deg)}
.tip{background:var(--alt);border-left:4px solid var(--brand);border-radius:0 var(--r) var(--r) 0;padding:14px 18px;margin:18px 0 0;max-width:78ch}
.note{color:var(--mut);font-size:14px;max-width:80ch}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0 34px}
.toc a{text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:8px 14px;font-size:14px;color:var(--tx);font-weight:500;transition:border-color .15s,color .15s}
.toc a:hover{border-color:var(--brand);color:var(--brand)}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff}
table{border-collapse:collapse;width:100%;font-size:14.5px}
th,td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
thead th{background:var(--ink);color:#fff;font-weight:600;font-size:13.5px;white-space:nowrap}
tbody th{font-weight:600}tbody tr:last-child>*{border-bottom:0}
tbody tr:hover{background:var(--alt)}
tr[hidden]{display:none}
.fig{margin:22px 0 0}.fig img{display:block;width:100%;height:auto;border-radius:var(--r);background:var(--alt)}
.fig figcaption{margin-top:8px;font-size:13.5px;color:var(--mut)}

.faq{background:#fff;border:1px solid var(--line);border-radius:var(--r);margin:0 0 10px}
.faq[open]{border-color:var(--brand)}
.faq summary{cursor:pointer;font-weight:600;color:var(--ink);padding:16px 20px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:none;color:var(--brand);font-size:24px;line-height:1;font-weight:400;transition:transform .2s}
.faq[open] summary::after{transform:rotate(45deg)}
.faq p{margin:0;padding:0 20px 18px;color:var(--mut)}

.form{padding:26px}
.form label{display:block;font-weight:600;font-size:14.5px;margin-bottom:14px}
.form .g2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
input,select,textarea{display:block;width:100%;margin-top:6px;font:400 16px var(--f);color:var(--tx);background:#fff;border:1px solid #c3cfd2;border-radius:var(--r);padding:11px 13px;transition:border-color .15s,box-shadow .15s}
input:hover,select:hover,textarea:hover{border-color:#8fa3a8}
input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(14,111,99,.18);outline:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.chk{display:flex!important;gap:10px;align-items:flex-start;font-weight:400!important}
.chk input{width:auto;margin-top:5px;accent-color:var(--brand)}
.form .btn{margin-top:6px}
#lead-msg,#lk-out{margin:12px 0 0;font-weight:600}
.ok{color:var(--ok)}.err,.no{color:var(--bad)}
.q{margin:0 0 18px}.q b{display:block;margin-bottom:8px}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opts label{margin:0;position:relative}
.opts label input{position:absolute;opacity:0;width:1px;height:1px;margin:0}
.opts label span{display:inline-block;border:1px solid #c3cfd2;border-radius:var(--r);padding:9px 16px;cursor:pointer;font-size:15px;transition:background .15s,border-color .15s,color .15s}
.opts label:hover span{border-color:var(--brand)}
.opts label:has(input:checked) span{background:var(--brand);color:#fff;border-color:var(--brand)}
.opts label:has(input:focus-visible) span{outline:3px solid #f0b13e;outline-offset:2px}
#tool-res{margin-top:20px}
.filters{display:flex;flex-wrap:wrap;gap:14px;margin:0 0 12px}
.filters label{font-weight:600;font-size:14px;min-width:180px}.filters .grow{flex:1;min-width:240px}

.cgrid{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:stretch}
.cside{color:#fff;border-radius:var(--r);padding:32px 28px;background:linear-gradient(180deg,rgba(8,30,36,.55),rgba(8,30,36,.9)),var(--hero-img,none) center/cover no-repeat,var(--ink);display:flex;flex-direction:column;justify-content:flex-end;min-height:360px}
.cside h3{color:#fff;font-size:1.25rem}.cside p{margin:0 0 8px;color:#dcebed}.cside a{color:#fff}
.cside .big{font-size:1.5rem;font-weight:700;margin:6px 0 10px}

footer{background:var(--ink);color:#b6cbce;padding:52px 0 30px;font-size:14.5px}
footer a{color:#e6f1f2;text-decoration:none}footer a:hover{text-decoration:underline}footer strong{color:#fff;font-size:1.05rem}
.fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px;margin-bottom:24px}
footer h4{margin:0 0 10px;color:#fff;font:600 14px var(--f)}
footer p{margin:0 0 6px}footer ul{list-style:none;margin:0;padding:0}footer li{margin:0 0 6px}
.disc{font-size:13px;color:#8fa8ac;max-width:92ch;border-top:1px solid rgba(255,255,255,.12);padding-top:16px;margin:0 0 8px}
.fab{position:fixed;right:14px;bottom:14px;z-index:40;display:none;align-items:center;gap:8px;background:var(--brand);color:#fff;text-decoration:none;font-weight:600;font-size:14px;padding:10px 15px;border-radius:var(--r);box-shadow:0 6px 18px rgba(0,0,0,.28)}
.fab:active{transform:scale(.97)}
.fab svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.cards3.ctx+.blk,.cards3.ctx+.card{margin-top:44px}

@media (max-width:1100px){.topics,.cards4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:1400px){#nav a{padding:10px 7px;font-size:13.8px}#nav a::after{left:7px;right:7px}.bar{gap:12px}}
@media (max-width:1200px){
.topbar{display:none}
.top{position:sticky}
.bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;min-height:62px}
.right{display:contents}
.brand{grid-column:2;grid-row:1;justify-self:center}
.burger{grid-column:1;grid-row:1;justify-self:start;width:44px;height:44px;padding:0;display:grid;place-items:center}
.langsel{grid-column:3;grid-row:1;justify-self:end}
.btn.sm{display:none}
#nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;background:#fff;padding:6px 16px 14px;border-bottom:1px solid var(--line);box-shadow:0 14px 24px rgba(11,43,51,.14);margin-left:0}
#nav.open{display:flex;max-height:calc(100vh - 62px);max-height:calc(100dvh - 62px);overflow-y:auto;overscroll-behavior:contain}#nav a{padding:13px 4px;border-bottom:1px solid var(--line);font-size:15.5px}#nav a:last-child{border-bottom:0}#nav a::after{display:none}
.bar{position:relative}
}
@media (max-width:1100px){
.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.stats>div{padding:18px 18px}.stats>div:first-child{padding-left:18px}
.stats>div:nth-child(2){border-right:0}.stats>div:nth-child(-n+2){border-bottom:1px solid var(--line)}
.cards3,.cards2{grid-template-columns:minmax(0,1fr)}.fgrid{grid-template-columns:minmax(0,1fr)}.cgrid{grid-template-columns:minmax(0,1fr)}.cside{min-height:240px}
.fab{display:inline-flex}body{padding-bottom:64px}
.hero{background:linear-gradient(180deg,rgba(8,30,36,.82),rgba(8,30,36,.7)),var(--hero-img,none) center/cover no-repeat,var(--ink)}
.cta .btn{flex:1 1 auto}
}
@media (max-width:560px){.topics,.cards4,.form .g2{grid-template-columns:minmax(0,1fr)}.wrap{padding:0 16px}.hero h1{max-width:none;font-size:clamp(1.85rem,8vw,2.3rem)}.sec{padding:42px 0}.card{padding:20px 18px}.cta .btn{width:100%}.form{padding:20px}.brand span{font-size:15px}}
@media (hover:none){.topic:hover{box-shadow:none;border-color:var(--line)}.btn:hover{box-shadow:none}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}html{scroll-behavior:auto}}
@media print{.topbar,.top,.fab{display:none}.hero{background:none;color:#000;padding:20px 0}.hero h1,.lead{color:#000}}
.copy{margin:0;font-size:13px;color:#b6cbce}
/* tránh rơi 1-2 chữ xuống dòng */
h1,h2,h3,h4,.lead,.sub,figcaption,dt,dd,.btn,.fab{text-wrap:balance}
p,li,td,.card p,.tip,.disc,.copy{text-wrap:pretty}
.figs{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}.figs .fig{margin:0}.figs .fig img{aspect-ratio:16/9;object-fit:cover}@media(max-width:700px){.figs{grid-template-columns:minmax(0,1fr)}}
.toc a{max-width:100%;overflow-wrap:anywhere}
.toc a{white-space:normal}
.stats dd,.stats dt{overflow-wrap:anywhere}
@media (max-width:380px){.brand{font-size:.9rem;gap:6px}.brand img{width:28px;height:28px}.burger{width:40px;height:40px}.bar{gap:4px}.langsel summary{padding:8px 9px}}
.chk-att{border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;margin:0 0 14px;background:#f7fafa}
.chk-att b{display:inline-block;margin-right:10px}
.chk-att .chk-rm{background:none;border:1px solid var(--line);border-radius:var(--r);padding:4px 10px;cursor:pointer;font:inherit;font-size:13px;color:var(--tx)}
.chk-att .ticks{margin:8px 0 0}
.chk-att .ticks li{padding:6px 0 6px 26px;font-size:14px}
.tbl{position:relative}.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.badge{display:inline-flex;align-items:center;gap:8px;margin:0 0 18px;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.35);color:#fff;font-size:14px;font-weight:600}
.badge::before{content:"";width:8px;height:8px;border-radius:50%;background:#5fd3a5;box-shadow:0 0 0 0 rgba(95,211,165,.6);animation:pulse 2.2s infinite}
.badge.dark{background:#e7f3f1;border-color:#bfe0da;color:var(--brand-d);margin:0 0 12px}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(95,211,165,0)}100%{box-shadow:0 0 0 0 rgba(95,211,165,0)}}
.band{background:linear-gradient(110deg,var(--brand-d),var(--brand) 60%,#14897a);color:#fff;padding:clamp(34px,4.5vw,52px) 0}
.band .wrap{display:flex;align-items:center;justify-content:space-between;gap:28px}
.band h2{color:#fff;margin:0 0 6px;font-size:clamp(1.3rem,2.4vw,1.7rem)}.band p{margin:0;color:#d8efeb;max-width:66ch}
.btn.light{background:#fff;color:var(--brand-d);border-color:#fff;flex:none}.btn.light:hover{background:#eaf6f4;color:var(--brand-d)}
.btn.ghost-d{background:#fff;color:var(--brand);border-color:var(--brand)}.btn.ghost-d:hover{background:var(--brand);color:#fff}
.tl-h{margin-top:46px;font-size:clamp(1.2rem,2vw,1.45rem)}
.tl{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.tl li{display:grid;grid-template-columns:170px minmax(0,1fr);gap:18px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;position:relative;overflow:hidden}
.tl li::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--brand)}
.tl li.var::before{background:repeating-linear-gradient(180deg,var(--brand) 0 6px,transparent 6px 11px)}
.tl-d{font-weight:800;color:var(--brand);font-size:1.08rem;line-height:1.35}
.tl strong{display:block;color:var(--ink)}.tl span{display:block;color:var(--mut);font-size:14.5px}
.more-row{margin:22px 0 0}
.ins{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.insc{display:flex;flex-direction:column;padding:0;overflow:hidden;text-decoration:none;color:inherit;transition:border-color .2s,box-shadow .2s,transform .2s}
.insc:hover{border-color:var(--brand);box-shadow:0 10px 26px rgba(11,43,51,.12);transform:translateY(-3px)}
.insc-img{display:block;aspect-ratio:16/8;background:var(--alt) center/cover no-repeat;transition:transform .5s}
.insc:hover .insc-img{transform:scale(1.04)}
.insc-b{display:flex;flex-direction:column;gap:8px;padding:18px 20px 20px;flex:1;background:#fff;position:relative}
.insc h3{margin:0;font-size:1.12rem}.insc p{margin:0;color:var(--mut);font-size:15px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.insc .muted{margin-top:auto;font-size:14px;font-weight:600;color:var(--brand)}
.tag{display:inline-block;align-self:flex-start;font-size:12.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--brand);background:#e7f3f1;border-radius:4px;padding:3px 8px}
.tag.light{background:rgba(255,255,255,.15);color:#fff;margin:0 0 14px}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:14px;margin:0 0 18px;color:#b9dad5}.crumbs a{color:#e0ecee}
.meta{margin:18px 0 0;color:#b9dad5;font-size:14.5px}
.rprog{position:fixed;left:0;right:0;top:0;height:3px;z-index:60;pointer-events:none}.rprog span{display:block;height:100%;width:0;background:#5fd3a5}
.art{display:grid;grid-template-columns:250px minmax(0,1fr);gap:48px;align-items:start}
.art-side{position:sticky;top:96px;display:grid;gap:20px}
.toc-side{display:grid;gap:2px;border-left:2px solid var(--line)}
.toc-side b{font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:var(--mut);padding:0 0 8px 16px}
.toc-side a{color:var(--tx);text-decoration:none;font-size:14.5px;padding:6px 0 6px 16px;margin-left:-2px;border-left:2px solid transparent;transition:color .15s,border-color .15s}
.toc-side a:hover,.toc-side a.on{color:var(--brand);border-left-color:var(--brand);font-weight:600}
.side-cta{background:var(--alt);border-radius:var(--r);padding:16px}.side-cta .btn{width:100%}
.art-body{min-width:0}.art-body .blk{scroll-margin-top:90px}.art-body h3{margin-top:22px;font-size:1.1rem}
.keybox{background:#f2f8f7;border:1px solid #cfe5e1;border-radius:var(--r);padding:20px 22px 8px;margin:0 0 40px}
.keybox h2{font-size:1.05rem;text-transform:uppercase;letter-spacing:.05em;color:var(--brand-d)}.keybox .ticks li{border-color:#d8e9e6}
.pit{background:#fff8eb;border:1px solid #f1dcb0;border-left:4px solid #d99a1e;border-radius:0 var(--r) var(--r) 0;padding:12px 16px;margin:14px 0 0}
.pit b{display:block;color:#8a5a00;font-size:13px;text-transform:uppercase;letter-spacing:.04em}.pit p{margin:4px 0 0;font-size:15px}
.ctabox{display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--ink);color:#fff;border-radius:var(--r);padding:22px 24px;margin:0 0 42px}
.ctabox b{font-size:1.1rem}.ctabox p{margin:4px 0 0;color:#c3d6d8;font-size:15px}.ctabox .btn{flex:none}
.steps.big li{padding-bottom:30px}.steps.big .pit{margin-top:10px}
.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.two h3{margin-top:0}
.art-body .stats{margin-bottom:24px}
.cmpc{width:1%;white-space:nowrap}
.cmpb{font:600 13px var(--f);color:var(--brand);background:#fff;border:1px solid var(--brand);border-radius:999px;padding:5px 12px;cursor:pointer;transition:background .15s,color .15s}
.cmpb:hover{background:#e7f3f1}.cmpb[aria-pressed=true]{background:var(--brand);color:#fff}
#lf-table tr.sel>*{background:#f2f8f7}
.tray{position:fixed;left:50%;bottom:18px;z-index:45;transform:translate(-50%,160%);display:flex;align-items:center;gap:14px;background:var(--ink);color:#fff;border-radius:999px;padding:10px 12px 10px 22px;box-shadow:0 12px 30px rgba(11,43,51,.3);transition:transform .3s;max-width:calc(100% - 32px)}
.tray.show{transform:translate(-50%,0)}.tray b{color:#5fd3a5}
.tray button{font:600 14px var(--f);border-radius:999px;padding:8px 16px;cursor:pointer;border:1px solid #fff;background:#fff;color:var(--ink)}
.tray button.x{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.cmpd{border:0;border-radius:10px;padding:0;width:min(980px,calc(100% - 24px));max-height:calc(100vh - 40px);box-shadow:0 20px 60px rgba(0,0,0,.35)}
.cmpd::backdrop{background:rgba(8,30,36,.55)}
.cmpd-h{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:1}
.cmpd-h h2{margin:0;font-size:1.2rem}
.cmpd-h button{font:600 14px var(--f);background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:6px 12px;cursor:pointer}
.cmpd-b{padding:16px 20px 20px}.cmpd table th[scope=row]{width:22%;color:var(--mut);font-weight:600}
.cmpd-f{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.cmp-msg{color:var(--bad);font-size:14px;margin:8px 0 0;min-height:1.2em}
.rv{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}.rv.in{opacity:1;transform:none}
.totop{position:fixed;right:18px;bottom:18px;z-index:44;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink);font-size:20px;cursor:pointer;box-shadow:0 6px 18px rgba(11,43,51,.15);opacity:0;pointer-events:none;transition:opacity .25s}
.totop.show{opacity:1;pointer-events:auto}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}.badge::before{animation:none}}
@media (max-width:1100px){.totop{display:none}.ins{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:900px){.art{grid-template-columns:minmax(0,1fr);gap:24px}.art-side{position:static}.side-cta{display:none}.toc-side{border-left:0;display:flex;flex-wrap:wrap;gap:8px}.toc-side b{width:100%;padding:0}.toc-side a{border:1px solid var(--line);border-radius:var(--r);margin:0;padding:6px 12px;font-size:14px}.toc-side a.on{border-color:var(--brand)}
.band .wrap{flex-direction:column;align-items:flex-start}.ctabox{flex-direction:column;align-items:flex-start}.two{grid-template-columns:minmax(0,1fr)}}
@media (max-width:700px){.ins{grid-template-columns:minmax(0,1fr)}.tl li{grid-template-columns:minmax(0,1fr);gap:4px}.tray{bottom:80px;border-radius:12px;flex-wrap:wrap;justify-content:center;padding:10px 14px}.cmpd-b{padding:12px}}
.pgrid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.pcard{padding:0;overflow:hidden;display:flex;flex-direction:column;transition:box-shadow .25s,transform .25s}
.pcard:hover{box-shadow:0 10px 28px rgba(11,43,51,.12);transform:translateY(-3px)}
.pcard .ph{aspect-ratio:8/5;background:linear-gradient(135deg,#0e6f63,#0b2b33);overflow:hidden;display:grid;place-items:center}
.pcard .ph img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.pcard:hover .ph img{transform:scale(1.04)}
.ph-none .ic{width:56px;height:56px;margin:0;color:rgba(255,255,255,.75)}.ph-none .ic svg{width:56px;height:56px;stroke:currentColor}
.pcard .pb{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px;flex:1}
.ptag{align-self:flex-start;font-size:12px;font-weight:600;color:var(--brand-d);background:#e7f3f1;border-radius:999px;padding:3px 10px}
.pcard h3{font-size:17px;margin:2px 0 0}
.pwhere{display:flex;gap:8px;align-items:flex-start;margin:0;font-size:14px;color:var(--tx);line-height:1.5}.pwhere small{color:var(--mut);font-size:13px}
.pwhere .ic{flex:none;width:18px;height:18px;margin:1px 0 0}.pwhere .ic svg{width:18px;height:18px}
.pcard dl{margin:6px 0 0;padding-top:10px;border-top:1px solid var(--line);font-size:14px;line-height:1.5}
.pcard dt{color:var(--mut);font-size:12.5px;text-transform:uppercase;letter-spacing:.04em}.pcard dd{margin:0 0 8px;overflow-wrap:break-word}.pcard dd:last-child{margin:0}
.pgrid+.note{margin-top:22px}
@media (max-width:1100px){.pgrid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.pgrid{grid-template-columns:minmax(0,1fr)}}
@media (prefers-reduced-motion:reduce){.pcard,.pcard .ph img{transition:none}.pcard:hover,.pcard:hover .ph img{transform:none}}
/* trên máy tính đã có nút "Nhận tư vấn" tới #contact: ẩn mục Liên hệ để menu đủ chỗ cho "Dự án"; menu điện thoại vẫn có */
@media (min-width:1201px){#nav .nav-c{display:none}}
.partners{margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}.partners h3{font-size:18px;margin:0 0 4px}.partners .sub{margin:0 0 16px}
.plogos{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:16px}
.plogos li{background:#fff;border:1px solid var(--line);border-radius:var(--r);width:220px;max-width:100%;height:96px;display:grid;place-items:center;padding:16px 22px}
.plogos img{max-width:100%;max-height:52px;width:auto;height:auto;display:block}
@media (max-width:560px){.plogos li{width:calc(50% - 8px);height:80px;padding:12px}.plogos img{max-height:40px}}
button.ph{border:0;padding:0;margin:0;width:100%;cursor:zoom-in;position:relative;font:inherit;color:inherit}a.ph{display:grid}
.pcount{position:absolute;right:10px;bottom:10px;background:rgba(11,43,51,.78);color:#fff;font-size:12.5px;font-weight:600;border-radius:999px;padding:3px 10px;pointer-events:none}
.pcard h3 a{color:inherit;text-decoration:none}.pcard h3 a:hover{color:var(--brand)}
html.lb-open{overflow:hidden}
.lb{border:0;padding:0;background:transparent;max-width:none;max-height:none;width:100vw;height:100vh;height:100dvh;margin:0;inset:0}
.lb::backdrop{background:rgba(6,20,24,.92)}
.lb-in{position:relative;width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:56px 72px 28px;box-sizing:border-box}
.lb-t{color:#fff;font-weight:600;margin:0 0 12px;text-align:center;max-width:90%}
.lb figure{margin:0;display:flex;flex-direction:column;align-items:center;min-height:0;flex:1;justify-content:center;width:100%}
.lb img{max-width:100%;max-height:calc(100dvh - 160px);width:auto;height:auto;object-fit:contain;border-radius:4px;background:#0b2b33}
.lb-n{color:#cfe0de;font-size:14px;margin-top:10px}
.lb button{position:absolute;background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.3);border-radius:50%;width:48px;height:48px;font-size:28px;line-height:1;cursor:pointer;display:grid;place-items:center}
.lb button:hover{background:rgba(255,255,255,.24)}
.lb-x{top:12px;right:12px}.lb-p{left:12px;top:50%;transform:translateY(-50%)}.lb-nx{right:12px;top:50%;transform:translateY(-50%)}
.lb.one .lb-p,.lb.one .lb-nx,.lb.one .lb-n{display:none}
@media (max-width:600px){.lb-in{padding:60px 8px 72px}.lb-p,.lb-nx{top:auto;bottom:12px;transform:none}.lb-p{left:calc(50% - 60px)}.lb-nx{right:calc(50% - 60px)}.lb img{max-height:calc(100dvh - 190px)}}
.pgrid.g3{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
@media (max-width:1100px){.pgrid.g3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.pgrid.g3{grid-template-columns:minmax(0,1fr)}}