@import "https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&family=Outfit:wght@400;500;600;700;800&display=swap";@import "https://fonts.googleapis.com/earlyaccess/nanumgothic.css";html{box-sizing:border-box;-webkit-text-size-adjust:100%;overflow-y:scroll}*,:before,:after{box-sizing:inherit}body,p,h1,h2,h3,h4,h5,h6,ul,ol,li,dl,dt,dd,table,th,td,form,fieldset,legend,input,textarea,button,select,figure,figcaption{margin:0;padding:0}body{color:#4a5568;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f7fafc;font-family:Outfit,Noto Sans KR,Nanum Gothic,sans-serif;font-size:15px;line-height:1.6}body,input,textarea,select,button,table{font-family:inherit;font-size:inherit;line-height:inherit;color:inherit}img{vertical-align:middle;border:0;max-width:100%;height:auto}ul,ol{list-style:none}fieldset{border:none}fieldset legend{visibility:hidden;width:0;height:0;font:0/0 Arial;margin:0;padding:0;position:absolute;overflow:hidden}button{cursor:pointer;background:0 0;border:none}header,hgroup,article,nav,footer,figure,figcaption,canvas,section,time{display:block}hr{clear:both;background:#e2e8f0;border:0;height:1px;margin:20px 0}a{color:#2b6cb0;text-decoration:none;transition:color .2s,background-color .2s,border-color .2s}a:hover,a:active{color:#1a365d;text-decoration:none}table caption{visibility:hidden;width:0;height:0;font:0/0 Arial;margin:0;padding:0;position:absolute;overflow:hidden}input[type=text],input[type=password],input[type=email],select,textarea{border:1px solid #cbd5e0;border-radius:6px;outline:none;padding:10px 14px;transition:border-color .2s,box-shadow .2s}input[type=text]:focus,input[type=password]:focus,input[type=email]:focus,select:focus,textarea:focus{border-color:#3182ce;box-shadow:0 0 0 3px #4299e126}.clear{clear:both}.hide{display:none!important}#wrapper{flex-direction:column;min-height:100vh;display:flex}#container{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:30px 20px 60px}.sub-container{gap:40px;display:flex}@media (width<=991px){.sub-container{flex-direction:column;gap:20px}}#header{z-index:100;background-color:#fff;border-bottom:1px solid #edf2f7;position:sticky;top:0;box-shadow:0 2px 10px #00000005}.top-bar{justify-content:space-between;align-items:center;max-width:1200px;height:80px;margin:0 auto;padding:0 20px;display:flex}.logo .logo-text{color:#2b6cb0;letter-spacing:-1px;font-size:24px;font-weight:800}.nav-container{flex-direction:column;justify-content:center;align-items:flex-end;height:100%;display:flex}.top-menu{gap:15px;margin-bottom:5px;padding-top:5px;display:flex}.top-menu li a{color:#a0aec0;font-size:11px;font-weight:500}.top-menu li a:hover{color:#4a5568}#gnb{display:block}.main-menu-list{gap:35px;display:flex}.main-menu-list>li{padding:10px 0;position:relative}.main-menu-list>li>a{color:#2d3748;padding:10px 0;font-size:16px;font-weight:700;position:relative}.main-menu-list>li.on>a,.main-menu-list>li:hover>a{color:#2b6cb0}.main-menu-list>li>a:after{content:"";background-color:#2b6cb0;width:0;height:3px;transition:width .2s;position:absolute;bottom:-5px;left:0}.main-menu-list>li.on>a:after,.main-menu-list>li:hover>a:after{width:100%}.submenu{opacity:0;background-color:#fff;border:1px solid #edf2f7;border-radius:8px;width:170px;padding:12px 0;transition:opacity .2s;display:none;position:absolute;top:45px;left:50%;transform:translate(-50%);box-shadow:0 10px 25px #00000014}.main-menu-list>li:hover .submenu{opacity:1;display:block}.submenu ul li a{color:#718096;text-align:center;padding:8px 20px;font-size:13px;font-weight:500;display:block}.submenu ul li a:hover,.submenu ul li.active a{color:#2b6cb0;background-color:#f7fafc}.mobile-nav-toggle{cursor:pointer;z-index:110;background:0 0;border:none;flex-direction:column;justify-content:space-between;width:24px;height:18px;display:none}.hamburger-line{background-color:#2d3748;width:100%;height:2px;transition:all .3s}.mobile-drawer-overlay{z-index:1000;opacity:0;background-color:#00000080;width:100%;height:100%;transition:opacity .3s;display:none;position:fixed;top:0;left:0}.mobile-drawer-overlay.active{opacity:1;display:block}.mobile-drawer{z-index:1001;background-color:#fff;flex-direction:column;width:280px;height:100%;padding:20px;transition:right .3s;display:flex;position:fixed;top:0;right:-280px;box-shadow:-5px 0 25px #0000001a}.mobile-drawer-overlay.active .mobile-drawer{right:0}.mobile-drawer-header{border-bottom:1px solid #edf2f7;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:15px;display:flex}.mobile-drawer-header .logo-text{color:#2b6cb0;font-size:20px;font-weight:800}.mobile-drawer-close{color:#a0aec0;cursor:pointer;background:0 0;border:none;font-size:28px}.mobile-menu-list{flex:1;overflow-y:auto}.mobile-menu-item{border-bottom:1px solid #f7fafc;margin-bottom:10px}.mobile-menu-link{color:#2d3748;justify-content:space-between;align-items:center;padding:12px 5px;font-size:16px;font-weight:700;display:flex}.mobile-submenu{margin-bottom:10px;padding-left:15px}.mobile-submenu li a{color:#718096;padding:8px 0;font-size:14px;display:block}.mobile-submenu li.active a{color:#2b6cb0;font-weight:700}@media (width<=991px){.top-menu,#gnb{display:none}.mobile-nav-toggle{display:flex}}.sub-visual{color:#fff;text-align:center;background-color:#2b6cb0;background-image:linear-gradient(135deg,#1a365d 0%,#2b6cb0 100%);justify-content:center;align-items:center;height:180px;display:flex}.sub-visual-overlay h2{letter-spacing:-1px;margin-bottom:8px;font-size:32px;font-weight:800}.sub-visual-overlay p{opacity:.85;font-size:14px}@media (width<=767px){.sub-visual{height:140px}.sub-visual-overlay h2{font-size:26px}.sub-visual-overlay p{font-size:12px}}#lnb{flex-shrink:0;width:240px}.lnb h2{color:#2d3748;border-bottom:2px solid #2d3748;margin-bottom:20px;padding-bottom:10px;font-size:20px;font-weight:800}.lnb ul{background-color:#fff;border:1px solid #edf2f7;border-radius:8px;overflow:hidden}.lnb ul li{border-bottom:1px solid #edf2f7}.lnb ul li:last-child{border-bottom:none}.lnb ul li a{color:#4a5568;padding:14px 20px;font-size:14px;font-weight:600;transition:background-color .2s,color .2s;display:block}.lnb ul li.active a,.lnb ul li a:hover{color:#2b6cb0;background-color:#ebf8ff}.sub-bnr{margin-top:25px}.sidebar-cta{text-align:center;background-color:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:20px;box-shadow:0 4px 6px #00000003}.sidebar-cta h3{color:#718096;margin-bottom:10px;font-size:15px}.sidebar-phone{color:#e53e3e;margin-bottom:10px;font-size:22px;font-weight:800}.sidebar-desc{color:#a0aec0;font-size:12px;line-height:1.5}#contentArea{flex:1}@media (width<=991px){#lnb{width:100%}.lnb h2{display:none}.lnb ul{white-space:nowrap;background:0 0;border:none;padding-bottom:5px;display:flex;overflow-x:auto}.lnb ul li{border-bottom:none;margin-right:10px}.lnb ul li a{background-color:#fff;border:1px solid #e2e8f0;border-radius:30px;padding:10px 20px;font-size:13px}.lnb ul li.active a{color:#fff;background-color:#2b6cb0;border-color:#2b6cb0}.sub-bnr{display:none}}#footer{color:#a0aec0;background-color:#1a202c;border-top:1px solid #2d3748;padding:40px 20px}.footer-container{flex-direction:column;gap:15px;max-width:1200px;margin:0 auto;display:flex}.footer-logo{color:#fff;font-size:18px;font-weight:800}.footer-info{font-size:13px;line-height:1.7}.company-details span{margin-right:15px;display:inline-block}.copyright{color:#718096;font-size:12px}.sub-title{border-bottom:2px solid #2b6cb0;justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:12px;display:flex}.sub-title h2{color:#2d3748;font-size:24px;font-weight:800}.sub-title .path{color:#a0aec0;font-size:12px}.sub-title .path strong{color:#4a5568}@media (width<=767px){.sub-title{flex-direction:column;align-items:flex-start;gap:5px}.sub-title h2{font-size:20px}}.company-intro{font-size:15px;line-height:1.8}.intro-lead{background-color:#ebf8ff;border-left:5px solid #2b6cb0;border-radius:0 8px 8px 0;margin-bottom:30px;padding:25px 30px}.intro-lead h3{color:#2c5282;font-size:20px;font-weight:700;line-height:1.5}.intro-lead span{color:#2b6cb0}.intro-body{color:#4a5568;margin-bottom:35px}.intro-body p{margin-bottom:15px}.intro-features{grid-template-columns:1fr 1fr;gap:25px;margin-bottom:35px;display:grid}@media (width<=767px){.intro-features{grid-template-columns:1fr}}.feature-box{background-color:#fff;border:1px solid #edf2f7;border-radius:10px;padding:25px;box-shadow:0 4px 6px #00000003}.feature-box h4{color:#2b6cb0;margin-bottom:12px;font-size:16px;font-weight:700}.feature-box p{color:#718096;font-size:13.5px}.intro-outro{text-align:center;border-top:1px solid #edf2f7;padding-top:30px}.signature{color:#2d3748;margin-top:15px;font-size:16px}.philosophy-page .intro-lead{color:#7b341e;background-color:#fffaf0;border-left-color:#dd6b20}.philosophy-page .intro-lead span{color:#dd6b20}.ph-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:25px;display:grid}.ph-card{background-color:#fff;border:1px solid #edf2f7;border-radius:12px;padding:30px 25px;position:relative;box-shadow:0 4px 6px #00000003}.ph-icon{color:#edf2f7;font-size:36px;font-weight:800;position:absolute;top:15px;right:20px}.ph-card h4{color:#2b6cb0;margin-bottom:12px;font-size:17px;font-weight:700}.ph-card p{color:#718096;font-size:13.5px;line-height:1.6}.history-page{padding:10px 0}.timeline-container{padding-left:40px;position:relative}.timeline-container:before{content:"";background-color:#e2e8f0;width:2px;position:absolute;top:0;bottom:0;left:15px}.timeline-item{margin-bottom:30px;position:relative}.timeline-badge{color:#fff;z-index:2;background-color:#2b6cb0;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:11px;font-weight:700;display:flex;position:absolute;top:0;left:-40px;box-shadow:0 0 0 4px #ebf8ff}.timeline-panel{background-color:#fff;border:1px solid #edf2f7;border-radius:8px;padding:20px;box-shadow:0 4px 6px #00000003}.timeline-panel h4{color:#2d3748;margin-bottom:8px;font-size:16px;font-weight:700}.timeline-panel p{color:#718096;margin-bottom:5px;font-size:13.5px}.timeline-panel p:last-child{margin-bottom:0}.org-leadership{justify-content:center;gap:30px;margin-bottom:45px;display:flex}.org-node{text-align:center;background-color:#fff;border:1px solid #cbd5e0;border-radius:8px;min-width:140px;padding:15px 30px;box-shadow:0 4px 6px #00000003}.org-node.leader{color:#2b6cb0;background-color:#ebf8ff;border-color:#2b6cb0}.org-node h5{margin:0;font-size:14px;font-weight:700}.org-title-bar{text-align:center;margin-bottom:30px}.org-title-bar h4{color:#2d3748;margin-bottom:5px;font-size:18px;font-weight:700}.org-title-bar p{color:#718096;font-size:13.5px}.org-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;display:grid}.org-card{text-align:center;background-color:#fff;border:1px solid #edf2f7;border-radius:10px;padding:20px;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 6px #00000003}.org-card:hover{transform:translateY(-3px);box-shadow:0 10px 15px #0000000d}.branch-tag{color:#718096;background-color:#f7fafc;border:1px solid #e2e8f0;border-radius:20px;margin-bottom:12px;padding:3px 10px;font-size:11px;font-weight:700;display:inline-block}.org-card h4{color:#2d3748;margin-bottom:10px;font-size:16px;font-weight:700}.org-card .phone a{color:#2b6cb0;font-size:18px;font-weight:800}@media (width<=575px){.org-leadership{flex-direction:column;align-items:center;gap:15px}.org-node{width:100%;max-width:200px}}.business-page .intro-lead{background-color:#ebf8ff;border-left-color:#2b6cb0}.biz-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:25px;margin-bottom:40px;display:grid}.biz-card{background-color:#fff;border:1px solid #edf2f7;border-radius:12px;padding:25px;transition:transform .2s,border-color .2s;box-shadow:0 4px 6px #00000003}.biz-card:hover{border-color:#2b6cb0;transform:translateY(-3px)}.biz-card h4{color:#2b6cb0;border-left:3px solid #2b6cb0;margin-bottom:12px;padding-left:10px;font-size:16px;font-weight:700}.biz-card p{color:#4a5568;font-size:13.5px;line-height:1.6}.biz-footer-note{color:#718096;background-color:#f7fafc;border:1px solid #edf2f7;border-radius:8px;padding:20px;font-size:13.5px}.map-wrapper{overflow:hidden}.address-card{background-color:#fff;border:1px solid #edf2f7;border-radius:12px;justify-content:space-between;align-items:center;gap:30px;padding:25px;display:flex;box-shadow:0 4px 6px #00000003}@media (width<=767px){.address-card{flex-direction:column;align-items:stretch}}.address-info-section h4{color:#2d3748;margin-bottom:15px;font-size:18px;font-weight:700}.address-details-list{list-style:none}.address-details-list li{margin-bottom:10px;font-size:14px;display:flex}.address-details-list li:last-child{margin-bottom:0}.addr-label{color:#718096;flex-shrink:0;width:90px;font-weight:700}.addr-value{color:#4a5568}.map-links{flex-direction:column;flex-shrink:0;gap:12px;width:200px;display:flex}@media (width<=767px){.map-links{flex-direction:row;width:100%}}.map-btn{text-align:center;border-radius:6px;flex:1;padding:12px;font-size:13px;font-weight:700;transition:background-color .2s;display:block}.map-btn.kakao-map{color:#3c1e1e;background-color:#ffeb00}.map-btn.kakao-map:hover{background-color:#fada0a}.map-btn.naver-map{color:#fff;background-color:#2db400}.map-btn.naver-map:hover{background-color:#279b00}.gas-work-page .info-section{margin-bottom:45px}.gas-work-page .info-section h3{color:#2d3748;border-bottom:2px solid #e2e8f0;margin-bottom:15px;padding-bottom:8px;font-size:19px;font-weight:700}.section-lead{color:#4a5568;margin-bottom:25px;font-size:15px;line-height:1.7}.lpg-characteristics{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;display:grid}.char-card{background-color:#fff;border:1px solid #edf2f7;border-radius:10px;padding:20px;box-shadow:0 4px 6px #00000003}.char-card h4{color:#2b6cb0;margin-bottom:8px;font-size:15px;font-weight:700}.char-card p{color:#718096;font-size:13px}.volume-features{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;display:grid}.vf-item{background-color:#fff;border-radius:10px;padding:20px;box-shadow:0 4px 6px #00000003}.vf-item h5{color:#2b6cb0;margin-bottom:8px;font-size:15px;font-weight:700}.vf-item p{color:#718096;font-size:13px}.contract-benefits{flex-direction:column;gap:20px;display:flex}.cb-block{background-color:#fff;border:1px solid #edf2f7;border-radius:10px;padding:20px}.cb-block h5{color:#2d3748;margin-bottom:8px;font-size:15px;font-weight:700}.cb-block p{color:#718096;font-size:13.5px}.tank-benefits{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-bottom:40px;display:grid}.tb-card{background-color:#fff;border:1px solid #edf2f7;border-radius:10px;padding:25px;box-shadow:0 4px 6px #00000003}.tb-num{color:#2b6cb0;margin-bottom:10px;font-size:26px;font-weight:800}.tb-card h4{color:#2d3748;margin-bottom:10px;font-size:16px;font-weight:700}.tb-card p{color:#718096;font-size:13.5px}.tank-steps-flow{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;display:grid}.ts-flow-card{background-color:#fff;border:1px solid #edf2f7;border-radius:10px;align-items:flex-start;gap:15px;padding:20px;display:flex;box-shadow:0 4px 6px #00000003}.ts-flow-num{color:#fff;background-color:#2b6cb0;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:12px;font-weight:700;display:flex}.ts-flow-info h5{color:#2d3748;margin-bottom:5px;font-size:14px;font-weight:700}.ts-flow-info p{color:#718096;font-size:12px;line-height:1.5}.services-list-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;display:grid}.service-list-card{background-color:#fff;border:1px solid #edf2f7;border-radius:10px;padding:25px;box-shadow:0 4px 6px #00000003}.service-list-card h4{color:#2b6cb0;margin-bottom:10px;font-size:16px;font-weight:700}.service-list-card p{color:#718096;font-size:13.5px}.pilot-features{flex-direction:column;gap:20px;display:flex}.pf-card{background-color:#fff;border:1px solid #edf2f7;border-radius:10px;padding:25px;box-shadow:0 4px 6px #00000003}.pf-card h4{color:#2d3748;margin-bottom:8px;font-size:16px;font-weight:700}.pf-card p{color:#718096;font-size:13.5px}.main-visual{align-items:center;height:400px;display:flex;position:relative}.main-visual-overlay{background-color:#00000073;align-items:center;width:100%;height:100%;padding:0 20px;display:flex;position:absolute;top:0;left:0}.main-visual-text{color:#fff;width:100%;max-width:1200px;margin:0 auto}.main-visual-text h2{letter-spacing:-1px;margin-bottom:15px;font-size:38px;font-weight:800}.main-visual-text p{opacity:.9;font-size:16px}@media (width<=767px){.main-visual{height:250px}.main-visual-text h2{font-size:26px}.main-visual-text p{font-size:13px}}.section{grid-template-columns:repeat(3,1fr);gap:30px;display:grid}@media (width<=991px){.section{grid-template-columns:1fr;gap:30px}}.column h2{color:#2d3748;border-bottom:2px solid #2d3748;margin-bottom:15px;padding-bottom:8px;font-size:18px;font-weight:700}.notice-zone{background-color:#fff;border:1px solid #edf2f7;border-radius:12px;min-height:250px;padding:25px;position:relative;box-shadow:0 4px 6px #00000003}.notice-zone ul li{border-bottom:1px solid #f7fafc;justify-content:space-between;padding:10px 0;font-size:13.5px;display:flex}.notice-zone ul li a{color:#4a5568;text-overflow:ellipsis;white-space:nowrap;margin-right:15px;overflow:hidden}.notice-zone ul li a:hover{color:#2b6cb0}.notice-zone ul li span{color:#a0aec0;flex-shrink:0;font-size:11px}.notice-zone .more{color:#2b6cb0;font-size:12px;font-weight:700;position:absolute;bottom:25px;right:25px}.project-zone{background-color:#fff;border:1px solid #edf2f7;border-radius:12px;padding:25px;position:relative;overflow:hidden;box-shadow:0 4px 6px #00000003}.slider{border-radius:8px;width:100%;position:relative;overflow:hidden}.project-text-overlay{color:#fff;text-align:center;background-color:#000000b3;width:100%;padding:8px;font-size:13.5px;font-weight:700;position:absolute;bottom:0;left:0}.pagination{justify-content:center;gap:8px;margin-top:15px;display:flex}.pagination li{cursor:pointer;background-color:#cbd5e0;border-radius:50%;width:8px;height:8px}.pagination li.current{background-color:#2b6cb0;border-radius:10px;width:20px}.cc-zone{background-color:#fff;border:1px solid #edf2f7;border-radius:12px;flex-direction:column;padding:25px;display:flex;box-shadow:0 4px 6px #00000003}.cc-content{flex:1}.cc-content p{color:#718096;margin-bottom:15px;font-size:13px}.cc-phone a{color:#e53e3e;margin-bottom:15px;font-size:28px;font-weight:800;display:block}.link-inquiry{color:#fff;text-align:center;background-color:#2b6cb0;border-radius:6px;width:100%;margin-top:15px;padding:12px;font-size:14px;font-weight:700;transition:background-color .2s;display:block}.link-inquiry:hover{color:#fff;background-color:#1a365d}.board-container{width:100%}.board-info{color:#718096;margin-bottom:15px;font-size:13.5px}.board-info span{color:#2b6cb0;font-weight:700}.board-list{border-collapse:collapse;border-top:2px solid #2d3748;width:100%}.board-list th,.board-list td{text-align:center;border-bottom:1px solid #e2e8f0;padding:15px 10px;font-size:14px}.board-list th{color:#2d3748;background-color:#f7fafc;font-weight:700}.board-list td{color:#4a5568}.board-list td.title{text-align:left;font-weight:600}.board-list td.title a{color:#2d3748}.board-list td.title a:hover{color:#2b6cb0}.board-list tr:hover td{background-color:#fcfdfd}@media (width<=767px){.board-list thead{display:none}.board-list tr{border-bottom:1px solid #e2e8f0;padding:15px 5px;display:block;position:relative}.board-list td{color:#a0aec0;border-bottom:none;padding:2px 0;font-size:12px;display:inline-block}.board-list td.num{display:none}.board-list td.title{margin-bottom:6px;padding:0;font-size:14px;font-weight:700;display:block}.board-list td.author:after,.board-list td.date:after{content:" | ";margin:0 5px}.board-list td.status{display:block;position:absolute;top:15px;right:5px}}.board-view-container{background-color:#fff;border:1px solid #edf2f7;border-radius:12px;padding:30px;box-shadow:0 4px 6px #00000003}.board-view-header{border-bottom:1px solid #edf2f7;margin-bottom:20px;padding-bottom:15px}.board-view-header h3{color:#2d3748;margin-bottom:10px;font-size:20px;font-weight:800;line-height:1.4}.post-meta{color:#a0aec0;gap:20px;font-size:12.5px;display:flex}.post-meta strong{color:#718096}.board-view-content{color:#4a5568;min-height:200px;padding-bottom:30px;font-size:14.5px;line-height:1.8}.board-view-footer{border-top:1px solid #edf2f7;justify-content:space-between;padding-top:20px;display:flex}@media (width<=575px){.board-view-container{padding:20px}.board-view-header h3{font-size:17px}.post-meta{flex-wrap:wrap;gap:8px 15px}}.btn{text-align:center;cursor:pointer;border-radius:6px;padding:10px 20px;font-size:13.5px;font-weight:700;transition:background-color .2s,border-color .2s;display:inline-block}.btn-primary{color:#fff;background-color:#2b6cb0;border:1px solid #2b6cb0}.btn-primary:hover{color:#fff;background-color:#1a365d;border-color:#1a365d}.btn-secondary{color:#4a5568;background-color:#fff;border:1px solid #cbd5e0}.btn-secondary:hover{background-color:#f7fafc;border-color:#cbd5e0}.btn-danger{color:#fff;background-color:#e53e3e;border:1px solid #e53e3e}.btn-danger:hover{background-color:#c53030;border-color:#c53030}.btn-sm{padding:6px 12px;font-size:12px}