*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Malgun Gothic','Apple SD Gothic Neo',Arial,sans-serif;color:#333;line-height:1.6;background:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
:root{--primary:#1e3a5f;--secondary:#2d6a9f;--light:#f5f7fa;--border:#dde3ea;--muted:#666;--shadow:0 2px 12px rgba(0,0,0,.08)}

/* HEADER */
#header{background:var(--primary);position:fixed;top:0;left:0;right:0;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,.3)}
.header-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:68px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark-img{height:44px;width:auto;flex-shrink:0;filter:drop-shadow(0 1px 3px rgba(0,0,0,0.25))}
.logo-name .ko{color:#fff;font-size:14px;font-weight:700;display:block;line-height:1.3}
.logo-name .en{color:rgba(255,255,255,.6);font-size:10px}
#nav ul{display:flex;align-items:center}
#nav ul>li{position:relative}
#nav ul>li>a{display:flex;align-items:center;height:68px;padding:0 15px;color:rgba(255,255,255,.9);font-size:14px;font-weight:500;transition:background .2s;white-space:nowrap}
#nav ul>li>a:hover,#nav ul>li.active>a{background:var(--secondary);color:#fff}
.dropdown{display:none;position:absolute;top:68px;left:0;background:#fff;min-width:170px;border-top:3px solid var(--secondary);box-shadow:0 8px 24px rgba(0,0,0,.15);z-index:200}
#nav ul>li:hover .dropdown{display:block}
.dropdown a{display:block;padding:11px 18px;color:#444;font-size:13px;border-bottom:1px solid #f0f0f0;transition:all .15s}
.dropdown a:hover{background:var(--light);color:var(--secondary);padding-left:22px}
.lang-wrap{display:flex;gap:4px;margin-left:14px}
.lang-btn{padding:5px 11px;font-size:12px;font-weight:700;border-radius:3px;border:1px solid rgba(255,255,255,.35);color:rgba(255,255,255,.65);cursor:pointer;transition:all .2s}
.lang-btn:hover{border-color:rgba(255,255,255,.7);color:rgba(255,255,255,.9)}
.lang-btn.on{background:#fff;color:var(--primary);border-color:#fff}

/* PAGE WRAP */
.page-wrap{padding-top:68px}

/* HERO */
.hero{background:linear-gradient(135deg,var(--primary) 0%,#2d6a9f 60%,#3a8fc9 100%);color:#fff;padding:110px 20px 100px;text-align:center;position:relative;overflow:hidden}
.hero::after{content:'';position:absolute;bottom:-1px;left:0;right:0;height:60px;background:#fff;clip-path:ellipse(55% 100% at 50% 100%)}
.hero-tag{display:inline-block;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);padding:5px 16px;border-radius:20px;font-size:11px;letter-spacing:3px;margin-bottom:24px}
.hero h1{font-size:46px;font-weight:800;margin-bottom:20px;line-height:1.25;text-shadow:0 2px 4px rgba(0,0,0,.2)}
.hero p{font-size:17px;opacity:.88;max-width:540px;margin:0 auto 44px;line-height:1.8}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;padding:13px 30px;border-radius:4px;font-size:15px;font-weight:600;transition:all .2s}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{background:#e8eef5;transform:translateY(-2px)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7)}
.btn-outline:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}

/* SECTION */
.section{padding:80px 20px}
.section-alt{background:var(--light)}
.container{max-width:1200px;margin:0 auto}
.section-head{text-align:center;margin-bottom:52px}
.section-head h2{font-size:30px;color:var(--primary);display:inline-block}
.section-head h2::after{content:'';display:block;width:48px;height:3px;background:var(--secondary);margin:12px auto 0}
.section-head p{color:var(--muted);font-size:15px;margin-top:10px}

/* FEATURE CARDS */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.feat-card{background:#fff;border-radius:8px;padding:38px 28px;text-align:center;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.feat-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.feat-icon{font-size:46px;margin-bottom:16px;display:block}
.feat-card h3{font-size:17px;color:var(--primary);margin-bottom:10px}
.feat-card p{color:var(--muted);font-size:13px;line-height:1.7}

/* PRODUCT PREVIEW */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.prod-card{border-radius:8px;overflow:hidden;box-shadow:var(--shadow);transition:transform .2s}
.prod-card:hover{transform:translateY(-4px)}
.prod-thumb{height:150px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-size:48px}
.prod-body{background:#fff;padding:20px}
.prod-body h3{font-size:15px;color:var(--primary);margin-bottom:8px}
.prod-body p{color:var(--muted);font-size:12px;line-height:1.7;margin-bottom:12px}
.prod-link{color:var(--secondary);font-size:13px;font-weight:700}
.prod-link::after{content:' →'}

/* PAGE BANNER */
.page-banner{background:linear-gradient(135deg,var(--primary) 0%,#2a5a8c 100%);color:#fff;padding:56px 20px;text-align:center}
.page-banner h1{font-size:32px;font-weight:800;margin-bottom:8px}
.breadcrumb{font-size:13px;opacity:.7;margin-top:8px}
.breadcrumb a{color:rgba(255,255,255,.8)}
.breadcrumb .sep{margin:0 8px}

/* TABS */
.tab-nav{display:flex;border-bottom:2px solid var(--border);margin-bottom:40px;flex-wrap:wrap}
.tab-btn{padding:12px 22px;font-size:14px;font-weight:600;color:#888;cursor:pointer;border:none;background:none;border-bottom:3px solid transparent;margin-bottom:-2px;transition:all .2s;font-family:inherit;white-space:nowrap}
.tab-btn:hover{color:var(--secondary)}
.tab-btn.on{color:var(--primary);border-bottom-color:var(--primary)}
.tab-pane{display:none}
.tab-pane.on{display:block}

/* TIMELINE */
.timeline{position:relative;padding-left:36px;max-width:720px}
.timeline::before{content:'';position:absolute;left:10px;top:10px;bottom:10px;width:2px;background:linear-gradient(to bottom,var(--secondary),#ccc)}
.tl-item{position:relative;padding-bottom:38px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:-30px;top:7px;width:18px;height:18px;border-radius:50%;background:var(--secondary);border:3px solid #fff;box-shadow:0 0 0 2px var(--secondary)}
.tl-year{font-size:20px;font-weight:800;color:var(--primary)}
.tl-month{font-size:14px;color:var(--secondary);font-weight:600}
.tl-text{font-size:15px;color:#555;line-height:1.7}

/* CERT CARDS */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:22px;margin-bottom:24px}
.cert-card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:26px;display:flex;gap:18px;align-items:flex-start;box-shadow:var(--shadow);transition:transform .2s}
.cert-card:hover{transform:translateY(-3px)}
.cert-badge{width:64px;height:64px;background:var(--primary);color:#fff;border-radius:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-weight:900;text-align:center;line-height:1.2;flex-shrink:0}
.cert-badge .big{font-size:16px}
.cert-badge .sm{font-size:12px}
.cert-info h3{font-size:18px;color:var(--primary);margin-bottom:6px}
.cert-info p{color:var(--muted);font-size:13px}
.cert-note{padding:16px 20px;background:var(--light);border-left:4px solid var(--secondary);border-radius:4px;font-size:13px;color:#555}

/* MATERIAL CARDS */
.mat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px;margin-bottom:32px}
.mat-card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:18px;border-top:3px solid var(--secondary)}
.mat-badge{display:inline-block;background:var(--primary);color:#fff;padding:3px 10px;border-radius:4px;font-size:12px;font-weight:700;margin-bottom:8px}
.mat-card p{font-size:12px;color:var(--muted);line-height:1.65}

/* SPEC TABLE */
.spec-table-wrap{overflow-x:auto;border-radius:8px;border:1px solid var(--border);margin-top:8px}
.spec-table{width:100%;border-collapse:collapse;font-size:14px;min-width:280px}
.spec-table th{background:var(--primary);color:#fff;padding:11px 20px;text-align:center;white-space:nowrap;font-size:13px}
.spec-table td{padding:9px 20px;text-align:center;border-bottom:1px solid #f0f0f0}
.spec-table tr:last-child td{border-bottom:none}
.spec-table tr:nth-child(even) td{background:#f8f9fb}
.spec-table tr:hover td{background:#eef2f7}
.spec-group-hd td{background:var(--primary)!important;color:#fff;font-size:12px;font-weight:700;padding:7px 20px;text-align:left;letter-spacing:.5px}
.spec-grp-sep{border-left:2px solid rgba(255,255,255,0.35)}
.spec-table td.spec-grp-sep{border-left:2px solid #d0d8e4}
.spec-grp-798{border-left:2px solid rgba(255,255,255,0.35)}
.spec-table td.spec-grp-798{border-left:2px solid #d0d8e4}
.spec-note{font-size:12px;color:#888;margin-top:10px;line-height:1.6}
.spec-h{font-size:16px;font-weight:700;color:var(--primary);margin:28px 0 10px;padding-bottom:8px;border-bottom:2px solid var(--border)}

/* ROPE STRUCTURES */
.struct-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-bottom:32px}
.struct-card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:18px 12px;text-align:center;box-shadow:var(--shadow)}
.struct-svg{margin:0 auto 10px;display:block}
.struct-name{font-size:17px;font-weight:800;color:var(--primary);margin-bottom:4px}
.struct-range{font-size:12px;color:var(--secondary);font-weight:600;margin-bottom:8px}
.struct-desc{font-size:11px;color:var(--muted);line-height:1.6;text-align:left}

/* PRODUCT INTRO */
.prod-intro{display:flex;gap:36px;align-items:flex-start;margin-bottom:36px}
.prod-intro-img{width:230px;height:170px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;flex-direction:column;align-items:center;justify-content:center;color:rgba(255,255,255,.85);flex-shrink:0;font-size:50px}
.prod-intro-img span{font-size:13px;margin-top:8px;opacity:.8}
.prod-intro-text h2{font-size:24px;color:var(--primary);margin-bottom:14px;padding-bottom:14px;border-bottom:2px solid var(--border)}
.prod-intro-text p{font-size:15px;color:#555;line-height:1.9}

/* DH-WIRE */
.dhwire-badge{display:inline-block;background:#c0392b;color:#fff;padding:4px 12px;border-radius:4px;font-size:12px;font-weight:700;margin-bottom:16px;letter-spacing:.5px}
.spec-kv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:20px 0 32px}
.spec-kv{background:var(--light);border-radius:8px;padding:18px;border-left:4px solid var(--secondary);text-align:center}
.spec-kv .k{font-size:12px;color:var(--muted);margin-bottom:6px}
.spec-kv .v{font-size:16px;font-weight:800;color:var(--primary)}
.use-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:32px}
.use-card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:22px;text-align:center;box-shadow:var(--shadow)}
.use-card .use-img{width:100%;height:160px;object-fit:contain;border-radius:6px;margin-bottom:14px;display:block}
.use-card h3{font-size:15px;color:var(--primary);margin-bottom:8px}
.use-card p{font-size:12px;color:var(--muted);line-height:1.65}
.coated-img{width:100%;max-width:700px;border-radius:8px;display:block;margin:24px 0;object-fit:contain}

/* LOCATION */
.loc-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.loc-map{border-radius:10px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border)}
.loc-map iframe{width:100%;height:400px;display:block;border:none;border-radius:10px 10px 0 0}
.loc-map-links{display:flex;gap:8px;padding:10px 12px;background:#f5f7fa;border-top:1px solid var(--border);border-radius:0 0 10px 10px}
.map-link-btn{display:inline-flex;align-items:center;padding:6px 14px;border-radius:4px;font-size:12px;font-weight:700;color:#fff;transition:opacity .2s}
.map-link-btn:hover{opacity:.85}
.map-link-btn.naver{background:#03c75a}
.map-link-btn.kakao{background:#fee500;color:#3c1e1e}
.loc-info h2{font-size:20px;color:var(--primary);margin-bottom:20px}
.loc-list{list-style:none;padding:0;margin:0}
.loc-list li{display:flex;gap:14px;padding:13px 0;border-bottom:1px solid #eee;font-size:14px}
.loc-list li:last-child{border-bottom:none}
.loc-label{color:#888;font-size:12px;font-weight:700;width:52px;flex-shrink:0;padding-top:2px}
.loc-val{color:#333;line-height:1.6}
.loc-val a{color:var(--secondary)}
.loc-dir-item{display:flex;align-items:flex-start;gap:10px;padding:8px 0;font-size:13px;color:#555;line-height:1.6}
.loc-dir-icon{font-size:18px;flex-shrink:0}

/* FOOTER */
#footer{background:#111;color:#888}
.footer-top{padding:48px 20px}
.footer-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.footer-logo{margin-bottom:12px}
.footer-logo-img{height:36px;width:auto;margin-bottom:12px;filter:drop-shadow(0 1px 3px rgba(0,0,0,0.4))}
.footer-brand .fname{color:#ccc;font-size:14px;font-weight:700;margin-bottom:10px}
.footer-brand p{font-size:12px;margin-bottom:5px;line-height:1.7}
.footer-brand a{color:#888}
.footer-brand a:hover{color:#ccc}
.footer-links h4{color:#aaa;font-size:11px;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:12px}
.footer-links li{margin-bottom:7px}
.footer-links a{font-size:13px;color:#666;transition:color .2s}
.footer-links a:hover{color:#ccc}
.footer-bottom{border-top:1px solid #222;text-align:center;padding:18px 20px;font-size:12px;color:#555}

/* RESPONSIVE */
@media(max-width:1024px){.struct-grid{grid-template-columns:repeat(3,1fr)}.prod-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:960px){.feat-grid{grid-template-columns:1fr 1fr}.loc-grid{grid-template-columns:1fr}.loc-map iframe{height:300px}.prod-intro{flex-direction:column}.prod-intro-img{width:100%;height:150px}.spec-kv-grid{grid-template-columns:1fr}.use-grid{grid-template-columns:1fr}}
@media(max-width:768px){.header-inner{height:auto;padding:10px 16px;flex-wrap:wrap}.logo{order:1}.lang-wrap{order:2}#nav{order:3;width:100%;overflow-x:auto}#nav ul{min-width:max-content}#nav ul>li>a{height:46px;padding:0 10px;font-size:13px}.page-wrap{padding-top:110px}.hero h1{font-size:28px}.hero p{font-size:14px}.section{padding:50px 16px}.section-head h2{font-size:24px}.prod-grid{grid-template-columns:1fr 1fr}.struct-grid{grid-template-columns:repeat(2,1fr)}.mat-grid{grid-template-columns:1fr 1fr}.feat-grid{grid-template-columns:1fr}}
@media(max-width:480px){.prod-grid{grid-template-columns:1fr}.struct-grid{grid-template-columns:1fr}.mat-grid{grid-template-columns:1fr}.cert-grid{grid-template-columns:1fr}.use-grid{grid-template-columns:1fr}}