/* SEONGO AI HUB V5 · established blue, navy and white design system */
:root{--ink:#142033;--muted:#637083;--line:#e1e7ef;--soft:#f4f7fb;--blue:#255ee8;--blue2:#1749c7;--navy:#112442;--max:1180px;--radius:24px;--header-height:84px;--font-ko:Pretendard,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",sans-serif}
.v5{margin:0;color:var(--ink);background:#fff;font-family:var(--font-ko);font-size:16px;line-height:1.75;word-break:keep-all;overflow-wrap:break-word;-webkit-font-smoothing:antialiased}
.v5 *{box-sizing:border-box}.v5 [hidden]{display:none!important}.v5 button,.v5 input,.v5 select,.v5 textarea{font:inherit}.v5 button,.v5 a,.v5 input,.v5 select{-webkit-tap-highlight-color:transparent}.v5 button{cursor:pointer}.v5 a{color:inherit;text-decoration:none}.v5 img,.v5 svg{max-width:100%}.v5 img{height:auto}.v5 h1,.v5 h2,.v5 h3,.v5 h4{letter-spacing:-.045em;line-height:1.3;text-wrap:balance}.v5 p{margin:0 0 1.1em}.v5 h1{font-size:clamp(38px,5.25vw,68px);font-weight:800;margin:0;line-height:1.17}.v5 h2{font-weight:800}.v5 h3{font-weight:750}.v5 a:focus-visible,.v5 button:focus-visible,.v5 input:focus-visible,.v5 select:focus-visible,.v5 summary:focus-visible{outline:3px solid #255ee8;outline-offset:5px}.v5 [id]{scroll-margin-top:108px}.v5 ::selection{background:#dae6ff;color:#173b80}.v5 .skip{position:absolute;left:-10000px}.v5 .skip:focus{position:fixed;left:18px;top:12px;z-index:200;background:#fff;border:2px solid var(--blue);padding:12px 18px;border-radius:10px}
.v5 .container{width:min(var(--max),calc(100% - 64px));margin-inline:auto}.v5 .wrap{max-width:var(--max);margin-inline:auto}.v5 .accent{color:var(--blue)}.v5 .muted{color:var(--muted)}.v5 .text-link{color:var(--blue);font-weight:750}.v5 .text-link:hover{text-decoration:underline;text-underline-offset:5px}.v5 .eyebrow,.v5 .section-kicker{display:block;font-size:11px;letter-spacing:.13em;font-weight:800;text-transform:uppercase;color:var(--blue);margin:0 0 17px}.v5 .eyebrow::before,.v5 .section-kicker::before{content:"";display:inline-block;vertical-align:middle;width:6px;height:6px;border-radius:50%;background:currentColor;margin-right:10px}
/* Shared navigation */
.v5 .site-header{position:sticky;top:0;z-index:80;border-bottom:1px solid rgba(218,226,237,.85);background:rgba(255,255,255,.96);backdrop-filter:blur(18px)}.v5 .header-inner{max-width:var(--max);margin:auto;min-height:var(--header-height);display:flex;align-items:center;justify-content:space-between;gap:26px;padding:0 0}.v5 .brand{display:flex;gap:11px;align-items:center;white-space:nowrap;font-size:20px;font-weight:850;letter-spacing:-.055em;line-height:1.18}.v5 .brand-mark{display:flex;align-items:center;justify-content:center;width:37px;height:37px;border-radius:11px;background:var(--blue);color:#fff;font-size:20px;letter-spacing:-.08em;flex:none}.v5 .brand-copy{display:flex;flex-direction:column;gap:5px}.v5 .brand-sub{font-size:8px;letter-spacing:.13em;font-weight:750;color:#7c8899}.v5 .brand small{font-size:8px;letter-spacing:.1em}.v5 .nav{display:flex;align-items:center;justify-content:flex-end;gap:22px;flex:1;font-size:13px;font-weight:700}.v5 .nav-links{display:flex;align-items:center;gap:23px}.v5 .nav-links>a{display:inline-flex;align-items:center;min-height:44px;white-space:nowrap;color:#465269}.v5 .nav-links>a:hover,.v5 .nav-links>a[aria-current="page"]{color:var(--blue)}.v5 .nav-group{display:flex;align-items:center;gap:10px}.v5 .nav-group .btn{padding:11px 16px;font-size:12px}.v5 .nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;color:var(--ink);font-size:19px;flex:none}.v5 .nav-toggle svg{width:21px;height:21px}
/* Buttons */
.v5 .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;border:1px solid #d6deea;border-radius:11px;padding:13px 21px;font-size:14px;font-weight:750;line-height:1.4;background:#fff;color:#263851;transition:background .18s,border-color .18s,transform .18s;box-shadow:none}.v5 .btn:hover{transform:translateY(-1px);border-color:#9eb7e4;background:#f6f9ff}.v5 .btn-primary,.v5 .btn.blue{background:var(--blue);border-color:var(--blue);color:#fff}.v5 .btn-primary:hover,.v5 .btn.blue:hover{background:var(--blue2);border-color:var(--blue2)}.v5 .btn-secondary{background:#fff;color:#21344f}.v5 .btn.primary{background:var(--navy);color:#fff;border-color:var(--navy)}.v5 .btn.soft{background:#edf3ff;color:#2455ad;border-color:#dce8ff}.v5 .hero-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:30px}.v5 .pill,.v5 .badge{display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border-radius:7px;border:1px solid #dce6f7;background:#f1f6ff;color:#315a9c;font-size:11px;line-height:1.5;font-weight:750;margin:0}.v5 .hero-note,.v5 .note{font-size:12px;line-height:1.85;color:#758195}.v5 .hero-note{margin-top:20px;max-width:680px}
/* Hero */
.v5:not(.legacy) .hero{max-width:none;margin:0;padding:91px 0 79px;background:radial-gradient(ellipse at 95% 4%,#eef4ff 0%,transparent 48%)}.v5 .hero-grid{display:grid;grid-template-columns:minmax(0,1.32fr) minmax(0,.88fr);gap:65px;align-items:center}.v5 .hero-copy{min-width:0}.v5 .hero-copy h1{max-width:760px}.v5 .hero-lead{font-size:17px;line-height:1.95;color:#5a687d;margin-top:25px;max-width:735px;letter-spacing:-.015em}.v5 .hero-panel{background:var(--navy);color:#fff;border:1px solid #203a60;border-radius:25px;padding:30px;position:relative;overflow:hidden;box-shadow:0 22px 60px rgba(23,48,88,.11)}.v5 .hero-panel::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(130,164,222,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(130,164,222,.045) 1px,transparent 1px);background-size:32px 32px}.v5 .hero-panel>*{position:relative}.v5 .hero-panel-top{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-bottom:21px;margin-bottom:3px;border-bottom:1px solid #314361;font-size:11px;letter-spacing:.08em;color:#a9bedc;font-weight:750}.v5 .hero-panel h2{font-size:26px;margin:24px 0 12px}.v5 .hero-panel p{color:#b7c7dc;font-size:13px;line-height:1.85}.v5 .signal-list{display:grid;gap:0}.v5 .signal-item{display:grid;grid-template-columns:32px minmax(0,1fr);gap:14px;align-items:center;padding:19px 0;border-bottom:1px solid #2b4060}.v5 .signal-item:last-child{border:0;padding-bottom:2px}.v5 .signal-no{font-size:11px;font-weight:750;color:#7da5f4;letter-spacing:.04em}.v5 .signal-item strong{display:block;font-size:16px;font-weight:750;line-height:1.5;margin-bottom:4px}.v5 .signal-item span:not(.signal-no),.v5 .signal-item p{display:block;color:#acbed7;font-size:12px;line-height:1.7;margin:0}.v5 .hero-panel .badge{color:#c7dcff;background:#1d3a67;border-color:#345381}
/* Sections and information */
.v5 .section{padding:86px 0}.v5 .section-soft{background:var(--soft)}.v5 .section-dark{background:var(--navy);color:#fff}.v5 .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:35px}.v5 .section-head>div{max-width:810px}.v5 .section-title,.v5 .section h2{font-size:clamp(29px,3.5vw,43px);font-weight:800;line-height:1.25;margin:0 0 16px;letter-spacing:-.045em}.v5 .section-copy{font-size:16px;color:#68758a;line-height:1.9;margin:0;max-width:760px}.v5 .section-head>.btn{flex:none;margin-bottom:4px}.v5 .section-dark .section-kicker{color:#87b0ff}.v5 .section-dark .section-copy{color:#b6c6dc}.v5 .stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border:1px solid var(--line);border-radius:19px;background:#fff;overflow:hidden}.v5 .stat{padding:27px 26px;border-right:1px solid var(--line);min-width:0}.v5 .stat:last-child{border:0}.v5 .stat-value{display:block;font-size:clamp(24px,3vw,36px);letter-spacing:-.055em;line-height:1.25;font-weight:800;color:var(--ink);margin-bottom:9px}.v5 .stat-label{display:block;font-size:12px;color:#728096;line-height:1.7}.v5 .section-dark .stats{background:#1a3151;border-color:#334a6b}.v5 .section-dark .stat{border-color:#334a6b}.v5 .section-dark .stat-value{color:#fff}.v5 .section-dark .stat-label{color:#aebfd6}.v5 .split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:58px;align-items:start}.v5 .prose{max-width:820px}.v5 .prose p{font-size:16px;color:#506077;line-height:1.95;margin:0 0 19px}.v5 .prose h2{font-size:30px;margin-top:45px}.v5 .prose h3{font-size:22px;margin-top:30px}.v5 .prose ul{padding-left:20px;color:#506077;font-size:16px;line-height:1.95}.v5 .prose li{margin:7px 0}.v5 .quote{margin:25px 0;border-left:3px solid var(--blue);padding:22px 25px;background:#f1f6ff;border-radius:0 15px 15px 0;font-size:19px;font-weight:650;line-height:1.8;color:#234979}.v5 .feature-list{display:grid;gap:17px}.v5 .feature{border:1px solid var(--line);border-radius:16px;background:#fff;padding:24px 26px}.v5 .feature h3{font-size:19px;margin:0 0 9px}.v5 .feature p{font-size:14px;color:#647287;line-height:1.85;margin:0}.v5 .feature-list .feature-number{display:block;color:var(--blue);font-size:11px;font-weight:800;margin-bottom:12px}.v5 .step-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;counter-reset:step}.v5 .step{counter-increment:step;border-top:2px solid #b8caec;padding:22px 5px 0}.v5 .step::before{content:counter(step,decimal-leading-zero);font-size:11px;font-weight:800;letter-spacing:.1em;color:var(--blue);display:block;margin-bottom:20px}.v5 .step h3{font-size:19px;line-height:1.5;margin:0 0 10px}.v5 .step p{color:#68758a;font-size:13px;line-height:1.85;margin:0}
/* Six primary services and supporting solution cards */
.v5 .service-grid,.v5 .sector-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.v5 .service-card{display:flex;flex-direction:column;position:relative;min-width:0;min-height:263px;border:1px solid var(--line);border-radius:19px;background:#fff;padding:27px;transition:transform .18s,border-color .18s,box-shadow .18s}.v5 .service-card:hover{transform:translateY(-3px);border-color:#a4bdea;box-shadow:0 13px 30px rgba(31,65,117,.045)}.v5 .service-index{display:block;color:#8a98aa;font-size:11px;font-weight:750;letter-spacing:.08em;margin-bottom:31px}.v5 .service-title,.v5 .service-card h3{font-size:23px;font-weight:750;line-height:1.4;margin:0 0 12px}.v5 .service-desc,.v5 .service-card>p{font-size:14px;color:#68758a;line-height:1.9;margin:0 0 22px}.v5 .service-link{font-size:13px;font-weight:750;color:var(--blue);display:block;margin-top:auto;padding-top:5px}.v5 .service-card .tags{margin:0 0 22px}.v5 .section-dark .service-card{background:#1a3151;border-color:#334a6b}.v5 .section-dark .service-desc,.v5 .section-dark .service-card>p{color:#b6c6dc}.v5 .section-dark .service-link{color:#91b8ff}
/* Portfolio */
.v5 .case-grid,.v5 .related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.v5 .case-card{display:flex;flex-direction:column;position:relative;min-width:0;border:1px solid var(--line);border-radius:19px;background:#fff;padding:26px;min-height:306px;transition:transform .18s,border-color .18s,box-shadow .18s}.v5 .case-card:hover{transform:translateY(-3px);border-color:#a4bdea;box-shadow:0 15px 35px rgba(26,55,101,.06)}.v5 .case-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:23px}.v5 .case-category{font-size:11px;font-weight:800;color:#315eae;line-height:1.45;background:#edf3ff;padding:5px 9px;border-radius:6px}.v5 .case-number{font-size:10px;color:#91a0b3;letter-spacing:.08em;font-weight:750}.v5 .case-title,.v5 .case-card h3{font-size:21px;line-height:1.45;letter-spacing:-.04em;margin:0 0 13px}.v5 .case-title a::after{content:"";position:absolute;inset:0;border-radius:19px}.v5 .case-title a:focus-visible{outline:0}.v5 .case-card:has(.case-title a:focus-visible){outline:3px solid var(--blue);outline-offset:4px}.v5 .case-summary{font-size:13px;color:#68758a;line-height:1.9;margin:0 0 21px}.v5 .case-meta{font-size:11px;line-height:1.65;color:#7a889b;margin:0 0 11px}.v5 .tags{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 18px}.v5 .tag{font-size:10px;color:#778399;background:#f5f7fa;border:1px solid #edf0f5;padding:3px 7px;border-radius:5px;font-weight:650;line-height:1.6}.v5 .case-link{display:flex;align-items:center;justify-content:space-between;gap:14px;border-top:1px solid #e8edf4;padding-top:16px;margin-top:auto;color:#315eae;font-size:12px;font-weight:750}.v5 .case-link::after{content:"↗";font-size:20px;font-weight:400;line-height:1}.v5 .case-art{height:115px;margin:-26px -26px 23px;border-bottom:1px solid #e1e9f7;border-radius:18px 18px 0 0;padding:22px;display:flex;align-items:center;justify-content:space-between;background:linear-gradient(120deg,#edf4ff,#f9fbff);overflow:hidden;color:#2c62c6}.v5 .case-art svg{height:70px;width:70px;stroke-width:1.25}.v5 .case-art>span{font-size:11px;letter-spacing:.12em;font-weight:800;color:#7692bc}.v5 .case-card[data-category~="press"] .case-art{background:linear-gradient(120deg,#eef0fa,#f8faff)}.v5 .case-card[data-category~="homepage"] .case-art{background:linear-gradient(120deg,#eaf5f6,#f8fbfd)}.v5 .case-card[data-category~="marketing"] .case-art{background:linear-gradient(120deg,#edf1f7,#f8faff)}.v5 .case-card[data-category~="military"] .case-art{background:linear-gradient(120deg,#edf4ef,#f8fbf8)}
.v5 .filters{display:flex;flex-wrap:wrap;gap:8px;margin:25px 0 23px}.v5 .filter-button{border:1px solid #d8e1ee;background:#fff;padding:10px 15px;border-radius:8px;font-size:12px;font-weight:700;line-height:1.4;color:#5b6b81;min-height:39px;transition:background .18s,border-color .18s,color .18s}.v5 .filter-button:hover{border-color:#90afe5;color:#255ee8}.v5 .filter-button.active,.v5 .filter-button[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:#fff}.v5 .search-field,.v5 .select-field{display:flex;flex-direction:column;gap:8px;font-size:11px;color:#63748c;font-weight:750}.v5 .search-field{flex:1;min-width:190px}.v5 .search-field input,.v5 .select-field select,.v5 input.search-field,.v5 select.select-field{width:100%;min-height:48px;border:1px solid #d6dfec;background:#fff;border-radius:10px;padding:12px 15px;color:#263851;font-size:14px;line-height:1.5}.v5 .search-field input::placeholder{color:#8a97aa}.v5 .select-field select{min-width:170px;padding-right:30px}.v5 .search-row,.v5 .catalog-search{display:flex;gap:13px;align-items:flex-end}.v5 .results-count{font-size:12px;color:#738198;display:flex;align-items:center;justify-content:space-between;gap:20px;margin:0 0 24px}.v5 .results-count strong{color:#263b59}.v5 #case-reset{border:0;background:transparent;color:var(--blue);font-size:12px;font-weight:700;text-decoration:underline;text-underline-offset:4px;padding:7px 0}.v5 .empty-state{border:1px dashed #b5c8e5;background:#fff;border-radius:18px;text-align:center;padding:60px 25px}.v5 .empty-state h3{margin:0 0 12px;font-size:23px}.v5 .empty-state p{color:#6e7d91;font-size:14px;margin:0}
/* Detail pages */
.v5 .breadcrumb{max-width:var(--max);width:min(var(--max),calc(100% - 64px));margin:0 auto;padding:24px 0 0;color:#8b97a8;font-size:11px;line-height:1.7}.v5 .breadcrumb a:hover{color:var(--blue)}.v5 .detail-hero{padding:49px 0 47px;border-bottom:1px solid var(--line);background:linear-gradient(135deg,#fff 50%,#f4f7fc)}.v5 .detail-hero h1{max-width:980px;font-size:clamp(35px,4.6vw,57px);line-height:1.26}.v5 .detail-hero .hero-lead{max-width:890px;font-size:17px}.v5 .detail-hero .tags{margin-top:23px}.v5 .detail-hero .stats{margin-top:30px}.v5 .detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:66px;align-items:start;padding-top:53px;padding-bottom:25px}.v5 .detail-body{min-width:0}.v5 .detail-body>.article-section:first-child{padding-top:0}.v5 .article-section{padding:0 0 38px;margin:0 0 38px;border-bottom:1px solid var(--line)}.v5 .article-section:last-child{border:0;margin-bottom:0}.v5 .article-section h2{font-size:28px;line-height:1.4;margin:0 0 20px}.v5 .article-section h3{font-size:21px;margin:30px 0 13px}.v5 .article-section p,.v5 .article-section li{font-size:16px;line-height:1.95;color:#526078}.v5 .article-section p{margin:0 0 17px}.v5 .article-section ul{padding-left:20px;margin:0 0 20px}.v5 .article-section li{margin:7px 0}.v5 .detail-aside{position:sticky;top:110px;min-width:0}.v5 .detail-aside>div,.v5 .detail-aside>section{border:1px solid var(--line);border-radius:16px;padding:24px;background:#fff;margin-bottom:18px}.v5 .detail-aside h2,.v5 .detail-aside h3{font-size:13px;color:#5d6e86;letter-spacing:0;margin:0 0 17px}.v5 .detail-aside p{font-size:12px;line-height:1.85;color:#768399;margin:0 0 18px}.v5 .detail-aside .btn{width:100%;font-size:12px;padding:12px}.v5 .toc{display:flex;flex-direction:column;gap:12px}.v5 .toc a{color:#53657d;font-size:12px;line-height:1.75}.v5 .toc a:hover{color:var(--blue)}.v5 .summary-list{margin:0;border-top:2px solid var(--navy)}.v5 .summary-row{display:grid;grid-template-columns:108px minmax(0,1fr);gap:22px;padding:17px 2px;border-bottom:1px solid var(--line)}.v5 .summary-row dt{font-size:13px;font-weight:750;color:#31435d}.v5 .summary-row dd{font-size:14px;line-height:1.85;color:#657389;margin:0}.v5 .summary-row dd ul{margin:0;padding-left:18px;font-size:14px}.v5 .timeline{margin:0;padding-left:18px;border-left:1px solid #cfdbed}.v5 .timeline-item{position:relative;padding:0 0 25px 13px;display:grid;grid-template-columns:114px minmax(0,1fr);gap:18px;color:#52657e;font-size:14px}.v5 .timeline-item::before{content:"";position:absolute;left:-23px;top:8px;background:var(--blue);width:9px;height:9px;border:2px solid #fff;border-radius:50%;box-shadow:0 0 0 1px #bfd0ed}.v5 .timeline-item:last-child{padding-bottom:0}.v5 .timeline-item strong{color:#2b56a0;font-size:12px;font-weight:750}.v5 .timeline-item p{font-size:14px;line-height:1.85;margin:0}.v5 .faq-list{border-top:1px solid var(--line)}.v5 .faq-list details{border-bottom:1px solid var(--line);padding:0}.v5 .faq-list summary{cursor:pointer;list-style:none;position:relative;padding:23px 40px 23px 0;font-weight:750;font-size:16px;line-height:1.65;color:#263b59}.v5 .faq-list summary::-webkit-details-marker{display:none}.v5 .faq-list summary::after{content:"+";position:absolute;right:4px;top:20px;font-size:22px;font-weight:400;color:#657b9b}.v5 .faq-list details[open] summary::after{content:"−"}.v5 .faq-list details>p,.v5 .faq-list details>div{font-size:14px;line-height:1.95;color:#68788f;padding:0 32px 23px 0;margin:0}.v5 .article-section .faq-list summary{font-size:15px}
/* Closing action and footer */
.v5 .cta{border:1px solid #dbe6f9;background:#edf3ff;border-radius:22px;padding:42px 45px;margin:0}.v5 .cta-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:35px}.v5 .cta h2{font-size:31px;line-height:1.35;max-width:780px;margin:0 0 12px}.v5 .cta p{color:#62738e;font-size:14px;line-height:1.9;margin:0;max-width:740px}.v5 .cta .hero-actions{margin-top:0}.v5 .footer{border-top:1px solid var(--line);padding:53px 0 27px;background:#fff}.v5 .footer-grid{width:min(var(--max),calc(100% - 64px));max-width:none;margin:auto;display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:50px}.v5 .footer h3{font-size:15px;letter-spacing:-.02em;margin:0 0 16px}.v5 .footer p,.v5 .footer a{font-size:12px;line-height:1.9;color:#7a879a}.v5 .footer p{margin:0 0 12px}.v5 .footer-links{display:flex;flex-wrap:wrap;gap:6px 20px;align-items:flex-start}.v5 .footer-links a:hover{color:var(--blue)}.v5 .footer-bottom{width:min(var(--max),calc(100% - 64px));max-width:none;margin:30px auto 0;border-top:1px solid var(--line);padding-top:20px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:10px;line-height:1.9;color:#99a3b3}.v5 .footer-service-nav{max-width:var(--max);margin:0 auto 30px;display:flex;flex-wrap:wrap;gap:12px 23px;border-bottom:1px solid var(--line);padding-bottom:24px}
/* Legacy content remains readable within the refreshed shared shell. */
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