:root{--blue:#246bfd;--navy:#14213d;--cyan:#18a6c9;--ink:#272c33;--muted:#69727d;--soft:#f4f6f8;--magenta:#d94a8c;--yellow:#f2c94c;--success:#2e9b67;--line:#dce3eb;--shadow:0 16px 42px rgba(20,33,61,.11)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Segoe UI",Arial,Helvetica,sans-serif;color:var(--ink);line-height:1.55;background:#fff}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input,select,textarea{font:inherit}.container{width:min(1160px,calc(100% - 40px));margin:auto}.topline{height:5px;background:linear-gradient(90deg,var(--blue) 0 78%,var(--magenta) 78% 89%,var(--yellow) 89%)}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);box-shadow:0 1px 0 var(--line)}.nav{min-height:76px;display:flex;gap:22px;align-items:center}.brand{line-height:1;font-weight:800;color:var(--navy);letter-spacing:.04em;white-space:nowrap}.brand strong{display:block;color:var(--blue);font-size:18px;margin-top:3px}.brand small{font-size:9px;color:var(--muted);letter-spacing:.12em}.nav-links{display:flex;gap:18px;margin-left:auto;font-size:14px;font-weight:700}.nav-links a:hover,.nav-links a.active{color:var(--blue)}.phone{font-weight:800;color:var(--navy);white-space:nowrap}.btn{border:0;border-radius:7px;padding:12px 18px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:800;font-size:13px;cursor:pointer;letter-spacing:.02em}.btn-primary{background:var(--blue);color:white;box-shadow:0 7px 16px rgba(36,107,253,.22)}.btn-secondary{background:white;color:var(--navy);border:1px solid #bfcbe0}.btn-dark{background:var(--navy);color:#fff}.hamburger{display:none;border:0;background:none;font-size:24px;margin-left:auto}.drawer{display:none}.hero{min-height:570px;color:white;background:linear-gradient(90deg,rgba(20,33,61,.96) 0%,rgba(20,33,61,.81) 42%,rgba(20,33,61,.18) 70%),url('../images/hero-techprint.png') center/cover;display:grid;align-items:center}.eyebrow{display:inline-flex;padding:5px 10px;background:rgba(24,166,201,.18);border:1px solid rgba(255,255,255,.26);border-radius:4px;font-weight:800;font-size:12px;letter-spacing:.1em}.hero h1{font-size:clamp(38px,5vw,64px);line-height:1.05;max-width:650px;margin:18px 0}.hero p{max-width:565px;font-size:18px;color:#eaf1ff}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.hero-card{margin-top:36px;display:flex;gap:24px;font-size:13px;font-weight:600}.hero-card span{border-left:2px solid var(--cyan);padding-left:12px}.section{padding:78px 0}.section-soft{background:var(--soft)}.section-navy{background:var(--navy);color:#fff}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:30px}.section-kicker{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.1em}.section h2{font-size:clamp(28px,3.4vw,40px);line-height:1.15;margin:7px 0 0;color:var(--navy)}.section-navy h2{color:#fff}.section-head p{max-width:470px;margin:0;color:var(--muted)}.grid{display:grid;gap:20px}.three{grid-template-columns:repeat(3,1fr)}.four{grid-template-columns:repeat(4,1fr)}.card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:0 4px 13px rgba(20,33,61,.04)}.visual{height:170px;position:relative;overflow:hidden;background:linear-gradient(135deg,#dfeaff,#f8fbff)}.visual:before,.visual:after{content:"";position:absolute}.visual.laptop:before{width:93px;height:61px;border:8px solid var(--navy);border-radius:5px;left:calc(50% - 46px);top:35px;background:linear-gradient(135deg,#18a6c9,#246bfd)}.visual.laptop:after{width:130px;height:8px;background:var(--navy);left:calc(50% - 65px);top:104px;border-radius:8px}.visual.print:before{width:112px;height:65px;background:#fff;border:8px solid #69727d;left:calc(50% - 56px);top:49px;border-radius:8px;box-shadow:0 -28px 0 -7px #d94a8c}.visual.print:after{width:58px;height:36px;background:linear-gradient(#f2c94c 0 30%,#fff 30% 55%,#18a6c9 55%);left:calc(50% - 29px);top:87px}.visual.network:before{width:118px;height:35px;border-radius:10px;background:var(--navy);left:calc(50% - 59px);top:85px;box-shadow:0 -27px 0 -14px #18a6c9}.visual.network:after{width:4px;height:50px;background:var(--navy);left:calc(50% - 46px);top:39px;box-shadow:92px 0 var(--navy)}.visual.paper:before{width:100px;height:125px;background:#fff;left:calc(50% - 50px);top:23px;box-shadow:14px -8px 0 #d94a8c,28px -16px 0 #f2c94c}.visual.paper:after{width:65px;height:4px;left:calc(50% - 32px);top:64px;background:#18a6c9;box-shadow:0 15px #69727d,0 30px #69727d}.card-body{padding:19px}.card h3{font-size:19px;line-height:1.2;margin:0 0 8px;color:var(--navy)}.card p{margin:0 0 16px;color:var(--muted);font-size:14px}.card-link{font-size:13px;font-weight:800;color:var(--blue)}.need-box{background:#fff;padding:27px;border-radius:10px;box-shadow:var(--shadow);border-top:4px solid var(--blue)}.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.field label{font-weight:700;font-size:13px;display:block;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;border:1px solid #cfd8e4;border-radius:6px;padding:11px;background:#fff;color:var(--ink)}.result{display:none;margin-top:20px;padding:18px;border-radius:7px;background:#edf4ff;border-left:4px solid var(--blue)}.result.show{display:block}.recommendations{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:12px}.recommend{background:#fff;padding:12px;border:1px solid #d7e4fb;border-radius:6px;font-weight:700;font-size:14px}.product-img{height:180px;background:linear-gradient(145deg,#edf3fb,#c8d9ee);display:grid;place-items:center}.product-icon{font-size:64px;filter:grayscale(.1)}.tag{font-size:10px;font-weight:800;color:var(--blue);letter-spacing:.08em}.specs{font-size:13px;color:var(--muted);min-height:43px}.price{font-size:19px;font-weight:800;color:var(--navy);margin:10px 0}.availability{font-size:12px;color:var(--success);font-weight:700}.service-card{padding:22px;background:#fff;border-radius:10px;border:1px solid var(--line)}.service-icon{width:45px;height:45px;display:grid;place-items:center;background:#e8f1ff;border-radius:9px;color:var(--blue);font-size:23px}.service-card h3{margin:15px 0 4px;color:var(--navy)}.service-card p{font-size:13px;color:var(--muted);margin:0 0 13px}.service-meta{font-size:12px;font-weight:700;color:var(--navy)}.calc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:25px;box-shadow:var(--shadow)}.calc-result{background:var(--navy);color:#fff;padding:23px;border-radius:8px;margin-top:20px}.calc-result strong{font-size:28px}.disclaimer{font-size:12px;color:var(--muted);margin-top:15px}.b2b{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}.b2b-visual{min-height:320px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--navy));position:relative;overflow:hidden}.b2b-visual:before{content:"B2B";position:absolute;font-size:120px;font-weight:800;color:rgba(255,255,255,.12);right:-12px;bottom:-35px}.b2b-visual:after{content:"Thiết bị · Setup · In ấn";position:absolute;color:#fff;font-size:21px;font-weight:800;left:30px;bottom:32px}.checklist{list-style:none;padding:0}.checklist li{padding:8px 0;border-bottom:1px solid var(--line)}.checklist li:before{content:'✓';color:var(--cyan);font-weight:800;margin-right:10px}.process{counter-reset:step}.process-item{position:relative;padding:22px 16px 0 65px}.process-item:before{counter-increment:step;content:'0' counter(step);position:absolute;left:0;top:15px;color:var(--cyan);font-size:25px;font-weight:800}.process-item h3{margin:0;color:var(--navy)}.process-item p{font-size:13px;color:var(--muted)}.notice{padding:17px;border-left:4px solid var(--yellow);background:#fff9e9;border-radius:4px;font-size:14px}.footer{background:#101a31;color:#dbe5f8;padding:52px 0 28px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:35px}.footer h3{color:#fff}.footer a{display:block;margin:8px 0;font-size:14px}.footer small{display:block;border-top:1px solid rgba(255,255,255,.15);margin-top:30px;padding-top:20px}.page-hero{padding:70px 0;background:linear-gradient(135deg,#e9f2ff,#fff)}.page-hero h1{font-size:43px;color:var(--navy);margin:9px 0}.filters{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.filter{padding:8px 13px;border:1px solid var(--line);background:#fff;border-radius:20px;font-weight:700;font-size:13px;cursor:pointer}.filter.active,.filter:hover{background:var(--blue);color:#fff;border-color:var(--blue)}.sort{margin-left:auto}.hidden{display:none!important}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}.main-product-photo{min-height:360px;border-radius:12px;background:linear-gradient(145deg,#dfefff,#f9fcff);display:grid;place-items:center;font-size:130px}.thumbs{display:flex;gap:10px;margin-top:12px}.thumb{border:2px solid transparent;border-radius:5px;padding:8px;background:#edf3f9;cursor:pointer}.thumb.active{border-color:var(--blue)}.quote-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:30px}.privacy{font-size:13px;background:#eef8f5;border-left:4px solid var(--success);padding:14px}.modal{position:fixed;inset:0;z-index:50;background:rgba(8,16,35,.62);display:none;place-items:center;padding:20px}.modal.show{display:grid}.modal-box{max-width:480px;background:#fff;border-radius:12px;padding:32px;text-align:center;box-shadow:var(--shadow)}.mobile-cta{display:none}@media(max-width:900px){.nav-links,.phone,.nav>.btn{display:none}.hamburger{display:block}.drawer.open{display:block;position:fixed;top:81px;left:0;right:0;background:#fff;border-top:1px solid var(--line);box-shadow:var(--shadow);padding:14px 20px}.drawer a{display:block;padding:13px 0;font-weight:800;border-bottom:1px solid var(--line)}.drawer .btn{margin-top:14px;width:100%}.three,.four{grid-template-columns:repeat(2,1fr)}.form-grid,.detail-grid,.quote-layout,.b2b{grid-template-columns:1fr}.recommendations{grid-template-columns:repeat(2,1fr)}.mobile-cta{display:flex;position:fixed;z-index:30;bottom:0;left:0;right:0;padding:9px 20px;background:#fff;border-top:1px solid var(--line);justify-content:space-between;gap:12px}.mobile-cta .btn{flex:1}.footer{padding-bottom:85px}}@media(max-width:560px){.container{width:min(100% - 28px,1160px)}.hero{min-height:590px;background-position:63% center}.hero h1{font-size:39px}.section{padding:55px 0}.three,.four,.recommendations{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:14px}.hero-card{gap:10px}.form-grid{gap:11px}.footer-grid{grid-template-columns:1fr}.page-hero{padding:48px 0}.page-hero h1{font-size:33px}}
