/* K39 — phương án B "Đường chéo K". Sinh trang bằng build.py, không sửa file trong dist/ */
@font-face{font-family:Montserrat;font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/montserrat-vietnamese-500-normal.woff2) format('woff2');unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:Montserrat;font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/montserrat-latin-ext-500-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:Montserrat;font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/montserrat-latin-500-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Montserrat;font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/montserrat-vietnamese-700-normal.woff2) format('woff2');unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:Montserrat;font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/montserrat-latin-ext-700-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:Montserrat;font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/montserrat-latin-700-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Montserrat;font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/montserrat-vietnamese-800-normal.woff2) format('woff2');unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:Montserrat;font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/montserrat-latin-ext-800-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:Montserrat;font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/montserrat-latin-800-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}


:root{
  --ground:#FFFFFF; --ground-2:#F1F2F5; --ink:#161A33; --soft:#2E3350;
  --navy:#1B2044; --navy-2:#262C57; --navy-3:#343B6E; --navy-4:#47508A;
  --red:#D7192A; --red-dark:#A9101E;
  --m:clamp(16px,4vw,56px);
  --cut:28px; /* the motif: the chamfer of the K39 arrow */
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Montserrat,system-ui,sans-serif;background:var(--ground);color:var(--ink);font-size:17px;line-height:1.55;font-weight:500}
img{display:block;width:100%;height:100%;object-fit:cover}
a{color:inherit}
:focus-visible{outline:3px solid var(--red);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.wrap{padding-left:var(--m);padding-right:var(--m)}
/* motif: one chamfered corner, top-right, like the arrow head of the K */
.cut{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%)}
.cut-l{clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut))}
.btn{--cut:14px;display:inline-flex;align-items:center;gap:12px;background:var(--red);color:#fff;text-decoration:none;font:inherit;font-weight:700;padding:18px 30px 18px 26px;border:0;cursor:pointer;transition:background .16s,transform .16s var(--ease)}
.btn:hover{background:var(--red-dark)}.btn:active{transform:scale(.97)}
h2{font-weight:800;letter-spacing:-.03em;line-height:1.04;font-size:clamp(40px,4vw,60px)}

/* ============ HERO: tabbed folder stack ============ */
.hero{background:var(--navy);color:#fff;min-height:100svh;position:relative;overflow:hidden;display:flex;flex-direction:column}
.top{display:flex;align-items:center;justify-content:space-between;padding:20px var(--m);gap:16px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:800;font-size:17px}
.brand img{width:40px;height:40px;object-fit:contain}
.top nav{display:flex;gap:28px;font-size:15px;font-weight:700}
.top nav a{text-decoration:none;opacity:.85;transition:opacity .15s}.top nav a:hover{opacity:1}
.hero h1{text-align:center;font-weight:800;letter-spacing:-.04em;line-height:1.05;font-size:clamp(72px,9.6vw,150px);margin-top:clamp(40px,7vh,90px)}
.hero h1 span{color:var(--red)}
.hero .sub{text-align:center;max-width:52ch;margin:20px auto 0;font-size:clamp(18px,1.4vw,20px);color:#E6E8F2;padding:0 16px}
.stack{position:relative;flex:1;min-height:52svh;margin-top:clamp(28px,5vh,56px)}
.folder{position:absolute;left:7%;right:7%;bottom:0;color:#fff;text-decoration:none}
.folder .tab{position:absolute;top:-40px;height:40px;padding:8px 34px 0 22px;font-size:17px;font-weight:700;white-space:nowrap;clip-path:polygon(0 0,calc(100% - 22px) 0,100% 100%,0 100%);transition:transform .2s var(--ease)}
.folder:hover .tab{transform:translateY(-6px)}
.folder .body{height:100%}
.f1{top:0}.f1,.f1 .tab{background:var(--navy-2)}.f1 .tab{left:0}
.f2{top:64px}.f2,.f2 .tab{background:var(--navy-3)}.f2 .tab{left:18%}
.f3{top:128px}.f3,.f3 .tab{background:var(--navy-4)}.f3 .tab{left:37%}
.f4{top:192px}.f4,.f4 .tab{background:#6A72A8}.f4 .tab{left:56%}
.f5{top:256px;bottom:-40px}.f5,.f5 .tab{background:var(--red)}.f5 .tab{left:75%}
.front{display:grid;grid-template-columns:auto minmax(0,1fr) 38%;gap:32px;padding:32px 0 0 32px;align-items:start;height:100%}
.front .shot{grid-row:1/3;grid-column:3;height:calc(100% + 40px);min-height:260px;--cut:48px}
.front p{grid-column:1/3}
.front .btn{background:#fff;color:var(--ink)}.front .btn:hover{background:#FFE3E5}
.front p{font-size:17px;max-width:46ch;color:#fff}

/* ============ PROOF: large names on tiles ============ */
section{padding-top:clamp(96px,12vw,180px)}
.proof .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.proof .t{background:var(--ground-2);padding:24px;aspect-ratio:3/2;display:flex;flex-direction:column;justify-content:flex-start}
.proof .head{justify-content:space-between}
.proof .t b{font-size:24px;font-weight:800;line-height:1.15;letter-spacing:-.01em}
.proof .t span{font-size:15px;color:var(--soft)}
.proof .head{grid-column:span 2;background:var(--red);color:#fff;aspect-ratio:auto}
.proof .head p{max-width:40ch}

/* ============ FEATURES: paragraph with picture words ============ */
.para p.big{font-size:clamp(24px,2.5vw,36px);font-weight:700;line-height:1.28;letter-spacing:-.01em;max-width:30em}
.pw{display:inline-block;width:1.9em;height:1em;vertical-align:-.12em;overflow:hidden;--cut:.3em}
.para .after{margin-top:56px;margin-left:50%;display:grid;gap:20px;max-width:44ch;justify-items:start}

/* ============ SERVICES list: two-column menu, photo bullets ============ */
.menu .cat{display:flex;justify-content:space-between;align-items:baseline;margin:0 0 40px}
.menu .cat span{font-size:17px;color:var(--soft)}
.items{display:grid;grid-template-columns:1fr 1fr;gap:40px 64px}
.item{display:grid;grid-template-columns:72px 1fr;gap:20px;text-decoration:none;align-items:start}
.item .ph{width:72px;height:72px;--cut:14px}
.item b{display:flex;justify-content:space-between;gap:12px;font-size:20px;font-weight:800;line-height:1.2}
.item b i{font-style:normal;color:var(--red);transition:transform .2s var(--ease)}
.item:hover b i{transform:translateX(6px)}
.item p{margin-top:6px;font-size:16px;max-width:42ch}
.item small{display:block;margin-top:6px;font-size:15px;color:var(--red);font-weight:700}

/* ============ WORK: staggered tiles, empty cells ============ */
.work .g{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;align-items:start}
.work figure img{transition:transform .5s var(--ease)}
.work figure:hover img{transform:scale(1.04)}
.work figure .fr{overflow:hidden}
.work figcaption{display:flex;justify-content:space-between;gap:12px;font-size:15px;padding-top:10px}
.work figcaption b{font-weight:700}
.work .w2{grid-column:span 2}.work .a32 .fr{aspect-ratio:3/2}.work .a45 .fr{aspect-ratio:4/5}
.work h2.cell{align-self:end;padding-bottom:40px}

/* ============ HOW: many into one ============ */
.how{background:var(--ground-2);margin-top:clamp(96px,12vw,180px);padding-bottom:96px}
.how .intro{max-width:620px}
.how .intro p{margin-top:16px}
.how svg{width:100%;height:auto;margin:48px 0 24px;display:block}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.steps b{display:block;font-size:20px;font-weight:800;margin-bottom:6px}
.steps p{font-size:16px;max-width:34ch}

/* ============ ABOUT: inset panel, shaped portrait ============ */
.panel{background:var(--navy);color:#fff;margin:0 20px;position:relative;overflow:hidden;display:grid;grid-template-columns:58% 1fr;padding:56px 56px 0}
.panel h2{color:#fff;max-width:11ch}
.panel .left{display:flex;flex-direction:column;gap:56px}
.panel .portrait{width:44vw;max-width:720px;aspect-ratio:4/3;--cut:96px;margin-bottom:-9%}
.panel .side{grid-column:2;grid-row:1;display:grid;gap:56px;align-content:start;max-width:340px;padding-bottom:56px}
.panel .side h3{font-size:20px;font-weight:800;margin-bottom:8px}
.panel .side p{font-size:16px;color:#E6E8F2}
.panel dl{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:15px}
.panel dt{font-weight:800}

/* ============ CONTACT: clip-out coupon ============ */
.coupon{display:grid;grid-template-columns:46% 1fr;background:var(--red);color:#fff;
  -webkit-mask:radial-gradient(circle 14px at 46% 0,#0000 98%,#000) top/100% 51% no-repeat,radial-gradient(circle 14px at 46% 100%,#0000 98%,#000) bottom/100% 51% no-repeat;
          mask:radial-gradient(circle 14px at 46% 0,#0000 98%,#000) top/100% 51% no-repeat,radial-gradient(circle 14px at 46% 100%,#0000 98%,#000) bottom/100% 51% no-repeat}
.coupon .l{padding:48px;display:flex;flex-direction:column;justify-content:space-between;gap:32px;border-right:5px dotted #fff}
.coupon h2{color:#fff;text-transform:uppercase;font-size:clamp(32px,3vw,44px)}
.coupon .r{padding:40px 48px;display:grid;gap:10px}
.chips{display:grid;grid-template-columns:1fr 1fr;gap:8px;border:0}
.chip{position:relative}.chip input{position:absolute;opacity:0}
.chip label{display:block;background:#B5101F;padding:14px 16px;font-weight:700;font-size:15px;cursor:pointer;transition:background .15s,transform .15s}
.chip label:active{transform:scale(.98)}
.chip input:checked+label{background:#fff;color:var(--ink)}
.chip input:focus-visible+label{outline:3px solid #fff;outline-offset:2px}
.coupon input[type=text],.coupon input[type=tel]{font:inherit;height:52px;background:#B5101F;border:0;color:#fff;padding:0 16px;width:100%}
.coupon input::placeholder{color:#FFD9DC}
.coupon input:focus{background:#fff;color:var(--ink);outline:none}
.coupon button{height:56px;background:var(--ink);color:#fff;font:inherit;font-weight:800;border:0;cursor:pointer;transition:background .15s,transform .15s}
.coupon button:hover{background:#000}.coupon button:active{transform:scale(.98)}
.contact .alt{margin-top:24px;display:flex;gap:32px;flex-wrap:wrap;font-size:17px}
.contact .alt a{font-weight:700}

/* ============ FOOTER: the mark built large ============ */
footer{background:var(--navy);color:#fff;margin-top:120px;padding:56px var(--m) 32px}
.mark{display:block;width:100%;height:34svh;min-height:200px}
.mark div{flex:1;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:clamp(80px,14vw,220px);line-height:1;color:var(--navy);overflow:hidden}
.mark .k{background:#fff;height:100%;clip-path:polygon(0 0,calc(100% - 64px) 0,100% 64px,100% 100%,0 100%)}
.mark .n3{background:var(--red);height:78%;color:#fff}
.mark .n9{background:#6A72A8;height:90%;color:#fff}
.fcols{display:grid;grid-template-columns:repeat(4,1fr) 1.4fr;gap:24px;margin-top:56px;font-size:15px}
.fcols ul{list-style:none;display:grid;gap:6px}
.fcols a{text-decoration:none}.fcols a:hover{color:#FFB3BA}
.fcols b{display:block;margin-bottom:8px;font-size:17px}
.legal{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:48px;font-size:15px;color:#E6E8F2}

.mbar{display:none}

/* ============ motion ============ */
.rv{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.rv.in{opacity:1;transform:none}
.no-js .rv{opacity:1;transform:none}
.folder{animation:rise .9s var(--ease) both}
.f2{animation-delay:.08s}.f3{animation-delay:.16s}.f4{animation-delay:.24s}.f5{animation-delay:.32s}
@keyframes rise{from{transform:translateY(80px);opacity:0}to{transform:none;opacity:1}}
@keyframes ken{from{transform:scale(1)}to{transform:scale(1.08)}}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}.folder,.panel .portrait img{animation:none}}

/* ============ phone ============ */
@media (max-width:820px){
  .top nav{display:none}
  .hero h1{font-size:15vw;margin-top:64px}
  .hero .sub{font-size:18px}
  .stack{min-height:62svh}
  .folder{left:0;right:0}
  .f2{top:52px}.f3{top:104px}.f4{top:156px}.f5{top:208px}
  .folder .tab{height:32px;top:-32px;font-size:15px;padding:6px 24px 0 14px}
  .f1 .tab{left:0}.f2 .tab{left:auto;right:0}.f3 .tab{left:30%}.f4 .tab{left:0}.f5 .tab{left:auto;right:0}
  .front{grid-template-columns:1fr;padding:24px 16px}.front .btn{justify-content:center}.front .shot{grid-row:auto;grid-column:auto;height:200px;min-height:0}.front p{grid-column:auto}
  .f1 .tab,.f4 .tab{left:16px}.f2 .tab,.f5 .tab{right:16px}
  .work h2.cell{grid-column:1/-1;font-size:10vw;padding-bottom:0;order:-1}
  .para p.big{font-size:22px}
  .how{margin-top:96px;padding-top:72px}
  .proof .grid{grid-template-columns:1fr 1fr;gap:6px}.proof .head{grid-column:1/-1}
  .proof .t b{font-size:17px}.proof .t{padding:16px}
  .proof .hide-m{display:none}
  .para .after{margin-left:0}
  .items{grid-template-columns:1fr}.item{grid-template-columns:56px 1fr}.item .ph{width:56px;height:56px}
  .work .g{grid-template-columns:1fr 1fr;gap:10px}.work .w2{grid-column:1/-1}.work .sp{display:none}
  .steps{grid-template-columns:1fr}
  .panel{margin:0 10px;grid-template-columns:1fr;padding:28px 20px 0;min-height:0}
  .panel .side{grid-column:1;margin-top:32px;max-width:none;gap:32px}
  .panel .left{display:contents}.panel .portrait{width:86vw;margin:40px auto -18%;order:3}
  .panel .side{grid-row:auto}
  .coupon{grid-template-columns:1fr;-webkit-mask:none;mask:none}
  .coupon .l{border-right:0;border-bottom:5px dotted #fff;padding:28px 20px}.coupon .r{padding:24px 20px}
  .fcols{grid-template-columns:1fr 1fr}
  .mark{height:22svh;min-height:140px}
  .legal{flex-direction:column;align-items:flex-start}
  .mbar{display:grid;grid-template-columns:repeat(3,1fr);position:fixed;left:0;right:0;bottom:0;z-index:50;background:var(--ink)}
  .mbar a{color:#fff;text-decoration:none;text-align:center;padding:14px 4px calc(14px + env(safe-area-inset-bottom));font-weight:700}
  .mbar a:last-child{background:var(--red)}
  body{padding-bottom:64px}
}

/* ===================== DÙNG CHUNG CHO TRANG CON ===================== */
.skip{position:absolute;left:-999px;top:8px;background:#fff;color:var(--ink);padding:10px 16px;z-index:99}
.skip:focus{left:8px}
.top nav a[aria-current=page]{opacity:1;text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}
/* menu điện thoại: <details> không cần JS */
.mnav{display:none}
.mnav summary{list-style:none;cursor:pointer;font-weight:800;font-size:17px;padding:10px 14px;background:var(--red);color:#fff;--cut:10px}
.mnav summary::-webkit-details-marker{display:none}
.mnav[open] summary{background:#fff;color:var(--ink)}
.mnav ul{display:none}
.mnav[open] ul{list-style:none;position:absolute;left:0;right:0;top:100%;background:var(--navy);padding:8px var(--m) 24px;z-index:40;display:grid}
.mnav ul a{display:block;padding:14px 0;font-size:20px;font-weight:800;text-decoration:none;color:#fff}
.mnav ul a[aria-current=page]{color:#FF9AA4}
.hdr{background:var(--navy);color:#fff;position:relative}

/* tiêu đề trang con: dải xanh than + góc chéo */
.phero{background:var(--navy);color:#fff;padding:24px var(--m) 0;position:relative;overflow:hidden}
.phero .in{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:48px;align-items:end;padding-top:clamp(32px,6vw,80px)}
.crumb{font-size:15px;color:#E6E8F2;margin-bottom:16px}
.crumb a{color:#fff}
.phero h1{font-weight:800;letter-spacing:-.035em;line-height:1.04;font-size:clamp(44px,5.6vw,84px);text-wrap:balance}
.phero .sub{margin-top:20px;font-size:clamp(18px,1.4vw,20px);color:#E6E8F2;max-width:46ch;padding-bottom:clamp(40px,5vw,72px)}
.phero .pic{align-self:end;aspect-ratio:4/3;--cut:64px;max-height:460px}
.phero .pic img{object-position:center 30%}

main section:first-child{padding-top:clamp(72px,8vw,120px)}
.lead2{font-size:clamp(20px,1.7vw,24px);font-weight:700;line-height:1.4;max-width:40ch;letter-spacing:-.01em}

/* hai cột chữ + ảnh */
.split2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,5vw,80px);align-items:start}
.split2 h2{margin-bottom:24px}
.split2 .pic{aspect-ratio:4/5;--cut:56px}
.split2.rev .pic{order:-1}
.prose{max-width:62ch}
.prose p+p{margin-top:16px}
.ticks{list-style:none;display:grid;gap:12px;margin-top:24px}
.ticks li{padding-left:28px;position:relative}
.ticks li::before{content:"";position:absolute;left:0;top:.45em;width:12px;height:12px;background:var(--red);clip-path:polygon(0 0,60% 0,100% 40%,100% 100%,0 100%)}

/* bảng thông tin pháp lý */
.facts{width:100%;border-collapse:collapse;margin-top:24px;border-top:4px solid var(--ink)}
.facts th,.facts td{text-align:left;vertical-align:top;padding:14px 0;border-bottom:1px solid #D9DBE3}
.facts th{font-weight:800;padding-right:32px;white-space:nowrap}
.facts td{overflow-wrap:anywhere}

/* giá trị cốt lõi: dải chữ lớn */
.values{display:flex;flex-wrap:wrap;gap:8px}
.values span{background:var(--ground-2);padding:20px 28px;font-size:clamp(22px,2.2vw,32px);font-weight:800;letter-spacing:-.02em;--cut:16px}
.values span:first-child{background:var(--red);color:#fff}

/* trang dịch vụ: khối "cách K39 làm" */
.flow{display:grid;grid-template-columns:repeat(var(--n,4),minmax(0,1fr));gap:8px;margin-top:40px}
.flow div{background:var(--ground-2);padding:24px;min-height:180px;display:flex;flex-direction:column;gap:10px}
.flow div:last-child{background:var(--navy);color:#fff}
.flow b{font-size:20px;font-weight:800;line-height:1.2}
.flow p{font-size:16px}

/* hỏi đáp */
.faq{max-width:860px}
.faq details{border-top:2px solid var(--ink)}
.faq details:last-child{border-bottom:2px solid var(--ink)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:24px;padding:22px 0;font-size:20px;font-weight:800;line-height:1.3}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--red);font-size:28px;line-height:1;transition:transform .2s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 24px;max-width:62ch}

/* danh sách khách hàng theo khối */
.groups{display:grid;gap:96px}
.grp .cat{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:24px}
.grp .cat span{font-size:17px;color:var(--soft)}
.grp ul{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.grp li{background:var(--ground-2);padding:20px 22px;font-weight:700;font-size:17px;line-height:1.3;min-height:84px}
.grp li small{display:block;font-weight:500;font-size:15px;color:var(--soft);margin-top:6px}
.projects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.projects article{background:var(--navy);color:#fff;padding:32px;display:grid;gap:12px;align-content:start;min-height:220px}
.projects article:nth-child(2n){background:var(--navy-2)}
.projects h3{font-size:22px;font-weight:800;line-height:1.2}

/* liên hệ */
.cinfo{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.cinfo div{background:var(--ground-2);padding:28px;display:grid;gap:8px;align-content:start}
.cinfo b{font-size:15px;color:var(--soft);font-weight:700}
.cinfo a,.cinfo span{font-size:clamp(20px,1.8vw,26px);font-weight:800;text-decoration:none;overflow-wrap:anywhere}
.cinfo .big{grid-column:1/-1;background:var(--red);color:#fff}
.cinfo .big b{color:#FFE3E5}
.map{display:block;margin-top:8px;background:var(--navy);color:#fff;padding:28px;text-decoration:none;font-weight:800;font-size:20px}
.map:hover{background:var(--navy-2)}

@media (max-width:820px){
  .mnav{display:block}
  .phero .in{grid-template-columns:1fr;gap:28px}
  .phero h1{font-size:clamp(34px,9.6vw,44px)}
  .phero .pic{max-height:none;margin:0 calc(var(--m)*-1)}
  .phero .sub{padding-bottom:0}
  .split2{grid-template-columns:1fr;row-gap:88px}
  .split2 .pic{aspect-ratio:4/3}
  .split2.rev .pic{order:0}
  .flow{grid-template-columns:1fr}
  .flow div{min-height:0}
  .grp ul{grid-template-columns:1fr}
  .grp li{min-height:0}
  .projects,.cinfo{grid-template-columns:1fr}
  .facts th{white-space:normal}
}

/* dải ảnh công trình chạy ngang phía trên phiếu báo giá */
.strip-wrap{overflow:hidden;margin-bottom:48px}
.strip{display:flex;gap:8px;width:max-content;animation:drift 70s linear infinite}
.strip img{height:150px;width:auto;flex:none;--cut:18px}
@keyframes drift{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.strip{animation:none}}
@media (max-width:820px){.strip img{height:110px}}

/* Web Interface Guidelines (Vercel) */
html{scroll-padding-top:16px}
a,button,label,summary{touch-action:manipulation;-webkit-tap-highlight-color:rgba(215,25,42,.18)}
#bao-gia,[id]{scroll-margin-top:16px}
.strip-wrap:hover .strip,.strip-wrap:focus-within .strip{animation-play-state:paused}
h1,h2,h3{text-wrap:balance}
@media (max-width:820px){html{scroll-padding-bottom:80px}}

/* ===== v1.1: chân trang gọn, nét chéo nhẹ (bỏ khối chữ K39 lớn) ===== */
footer{position:relative;margin-top:120px;padding-top:64px}
footer::before{content:"";position:absolute;left:0;top:0;width:min(420px,60%);height:8px;background:var(--red);clip-path:polygon(0 0,100% 0,calc(100% - 8px) 100%,0 100%)}
.fbrand{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.fbrand .brand{font-size:20px}
.fbrand p{color:#E6E8F2;font-size:15px}
.fcols{margin-top:40px}
/* ảnh giữ nguyên tỉ lệ, không cắt mặt người */
.keep{aspect-ratio:auto!important;height:auto!important;margin-bottom:0!important}
.keep img{height:auto;object-fit:contain}
.panel .portrait.keep{margin-bottom:56px!important;width:100%;max-width:none}
/* hình vẽ cho hạng mục chưa có ảnh thật */
.ico svg{display:block;width:100%;height:100%}
.split2.solo{grid-template-columns:minmax(0,1fr)}
.split2.solo .prose{max-width:72ch}

/* dự án nổi bật */
.featured{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:8px;background:var(--navy);color:#fff}
.featured .fimg{aspect-ratio:16/9;--cut:56px}
.featured .ftxt{padding:32px;display:grid;gap:16px;align-content:start}
.featured h3{font-size:clamp(24px,2.2vw,32px);font-weight:800;line-height:1.15}
.fthumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:8px}
.fthumbs img{aspect-ratio:3/4;--cut:16px}
@media (max-width:820px){.featured{grid-template-columns:1fr}.featured .ftxt{padding:24px 20px}}

@media (max-width:820px){.grp .cat{flex-direction:column;align-items:flex-start;gap:4px}}

/* ===================== v1.2 (22/10/2026) ===================== */
p,li,dd,figcaption{text-wrap:pretty}
/* logo + tên công ty đầy đủ */
.brand span{display:flex;flex-direction:column;line-height:1.15;font-size:15px;letter-spacing:.01em}
.brand small{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#FF9AA4;margin-top:3px}
.brand img{width:44px;height:44px}
.top{gap:24px}
.top nav{gap:24px;flex-wrap:wrap;justify-content:flex-end}
@media (max-width:1180px){.top nav{gap:16px;font-size:14px}}
/* hero: tiêu đề mới 2 dòng cân đối */
.hero h1{font-size:clamp(48px,7.4vw,118px);line-height:1.02;text-wrap:balance;max-width:14ch;margin-left:auto;margin-right:auto;padding:0 16px}
.hero h1 span{display:inline-block}
.hero .sub{max-width:60ch;text-wrap:balance}
/* khối "Nhận báo giá": lấp đầy, không còn khoảng trống */
.stack{min-height:max(560px,56svh)}
.front{grid-template-columns:minmax(0,1fr) minmax(0,42%);gap:40px;padding:36px 0 0 40px}
.front .fl{display:grid;gap:18px;align-content:start;padding-bottom:40px}
.front .lede{font-size:clamp(22px,2vw,30px);font-weight:800;line-height:1.2;letter-spacing:-.01em;max-width:24ch;color:#fff}
.front .phone{font-size:clamp(34px,3.6vw,56px);font-weight:800;letter-spacing:-.02em;line-height:1;color:#fff;text-decoration:none;white-space:nowrap}
.front .phone:hover{text-decoration:underline;text-underline-offset:6px}
.fticks{list-style:none;display:grid;gap:10px;max-width:52ch}
.fticks li{position:relative;padding-left:26px;font-size:16px;color:#fff}
.fticks li::before{content:"";position:absolute;left:0;top:.42em;width:12px;height:12px;background:#fff;clip-path:polygon(0 0,60% 0,100% 40%,100% 100%,0 100%)}
.facts-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px}
.btn.ghost{background:transparent;color:#fff;box-shadow:inset 0 0 0 2px #fff}
.btn.ghost:hover{background:#fff;color:var(--ink)}
.front .hours{font-size:15px;color:#FFE3E5}
.front .shot{grid-row:1;grid-column:2;height:calc(100% + 40px);min-height:320px}
.front p{grid-column:auto}
/* đơn vị đã tin dùng: ô gọn, không trống */
.proof .phead{display:flex;justify-content:space-between;align-items:end;gap:32px;flex-wrap:wrap;margin-bottom:28px}
.proof .phead p{max-width:52ch;color:var(--soft)}
.proof .phead a{font-weight:700;color:var(--red)}
.names{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.names li{background:var(--ground-2);padding:16px 18px;font-weight:700;font-size:16px;line-height:1.3;border-left:4px solid var(--red);display:flex;align-items:center;min-height:72px}
/* đáp ứng hồ sơ cơ quan */
.steps4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:40px}
.steps4 div{background:#fff;padding:24px;display:grid;gap:8px;align-content:start}
.steps4 b{font-size:19px;font-weight:800;line-height:1.2}
.steps4 p{font-size:16px}
.how{padding-top:clamp(72px,8vw,112px)}
/* đội áo đỏ: hai cột rõ ràng, ảnh không tràn */
.panel{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:56px;padding:56px;align-items:start}
.panel .left{gap:32px;min-width:0}
.panel .portrait,.panel .portrait.keep{width:100%;max-width:none;margin:0!important;--cut:56px}
.panel .side{grid-column:2;grid-row:1;max-width:none;padding-bottom:0}
/* văn phòng + bản đồ */
.visit{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:40px;align-items:stretch}
.visit .vtxt{display:grid;gap:14px;align-content:start}
.visit .vtxt p{font-size:18px}
.mapbox{background:var(--ground-2);min-height:360px;--cut:40px}
.mapbox iframe{display:block;width:100%;height:100%;min-height:360px;border:0}
.mapbox.big,.mapbox.big iframe{min-height:420px;margin-top:8px}
/* chân trang: thông tin pháp lý đầy đủ */
.fbrand .brand span{font-size:17px}
.fcols{grid-template-columns:repeat(3,minmax(0,1fr))}
.fcols li{color:#E6E8F2}
.legal{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:start;border-top:1px solid #3A4170;padding-top:28px;margin-top:40px;font-size:14px;line-height:1.6;color:#D5D8E6}
.legal b{color:#fff}
.copy{margin-top:24px;font-size:13px;color:#AEB3CC}
/* thanh liên hệ cố định bên phải màn hình */
.rail{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:60;display:grid;gap:6px}
.rail a{width:56px;height:56px;display:grid;place-items:center;color:#fff;text-decoration:none;position:relative;box-shadow:0 6px 18px rgba(22,26,51,.25);transition:width .2s var(--ease)}
.rail a svg{width:26px;height:26px}
.rail a span{position:absolute;right:62px;background:var(--ink);color:#fff;font-size:14px;font-weight:700;padding:6px 10px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .15s}
.rail a:hover span,.rail a:focus-visible span{opacity:1}
.rail .r-call{background:var(--red)}
.rail .r-zalo{background:#0068FF}.rail .r-zalo b{font-size:13px;font-weight:800;letter-spacing:.02em}
.rail .r-fb{background:#1877F2}
@media (prefers-reduced-motion:no-preference){.rail .r-call svg{animation:ring 2.6s ease-in-out infinite}}
@keyframes ring{0%,80%,100%{transform:rotate(0)}84%{transform:rotate(-14deg)}88%{transform:rotate(12deg)}92%{transform:rotate(-8deg)}96%{transform:rotate(4deg)}}

@media (max-width:1100px){
  .front{grid-template-columns:minmax(0,1fr) minmax(0,38%);gap:28px;padding-left:28px}
  .names{grid-template-columns:repeat(3,minmax(0,1fr))}
  .steps4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:820px){
  .brand span{font-size:12px;max-width:58vw}
  .brand small{font-size:9.5px}
  .brand img{width:36px;height:36px}
  .hero h1{font-size:clamp(40px,12vw,64px);margin-top:48px}
  .stack{min-height:0;height:auto;display:flex;flex-direction:column;gap:0;margin-top:56px}
  .folder{position:relative;top:auto!important;bottom:auto!important;left:0;right:0;height:52px;animation:none}
  .folder .tab{top:-32px}
  .f5{height:auto;margin-top:32px}
  .front{grid-template-columns:1fr;padding:24px 16px 28px;gap:20px}
  .front .shot{grid-row:auto;grid-column:auto;height:220px;min-height:0}
  .front .fl{padding-bottom:0}
  .front .phone{font-size:34px}
  .facts-row .btn{flex:1;justify-content:center}
  .names{grid-template-columns:1fr 1fr;gap:6px}
  .names li{font-size:14px;padding:12px 12px;min-height:64px}
  .names .hide-m{display:none}
  .steps4{grid-template-columns:1fr}
  .panel{grid-template-columns:1fr;gap:32px;padding:28px 20px}
  .panel .left{display:grid}
  .panel .side{grid-column:1;grid-row:auto}
  .panel .portrait,.panel .portrait.keep{width:100%;margin:0!important}
  .visit{grid-template-columns:1fr}
  .fcols{grid-template-columns:1fr 1fr}
  .legal{grid-template-columns:1fr}
  .rail{display:none}
  .mbar{grid-template-columns:repeat(4,1fr)}
  .mbar a:nth-child(3){background:#1877F2}
}
@media (max-width:820px){.fcols{grid-template-columns:repeat(2,minmax(0,1fr))}.fcols>div:last-child{grid-column:1/-1}}
/* v1.2 sửa sau kiểm thử: khối báo giá đủ cao, thanh liên hệ cách mép, chữ pháp lý ≥15px */
@media (min-width:821px){.stack{min-height:max(720px,66svh)}}
.rail{right:16px}
.rail a span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);opacity:1}
.legal{font-size:15px}
.copy{font-size:14px}
@media (max-width:820px){.work ul.ticks{columns:1!important}}