/* Language switch tab for Korean / English versions */
.language-switch{
  position:absolute;
  top:8px;
  right:14px;
  display:inline-flex;
  align-items:center;
  gap:5px;
  padding:5px 10px;
  border:1px solid rgba(0,86,179,.18);
  border-radius:999px;
  background:rgba(255,255,255,.94);
  box-shadow:0 8px 18px rgba(17,39,73,.08);
  font-size:12px;
  font-weight:850;
  line-height:1;
  z-index:1001;
}
.language-switch a{color:var(--brand-2);transition:.18s ease}
.language-switch a:hover{color:var(--accent)}
.language-switch a.active{color:var(--ink)}
.language-switch span{color:#9aa8ba}


:root{
  --brand:#003366;
  --brand-2:#0056b3;
  --brand-3:#0b74d1;
  --accent:#f58220;
  --accent-2:#ffb15f;
  --ink:#172033;
  --muted:#5d6b82;
  --line:#e7eef7;
  --surface:#ffffff;
  --soft:#f5f8fc;
  --soft-blue:#edf6ff;
  --shadow:0 18px 45px rgba(17,39,73,.10);
  --shadow-soft:0 10px 25px rgba(17,39,73,.08);
  --radius:18px;
  --radius-sm:12px;
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family: "Segoe UI", Arial, sans-serif;
  line-height:1.75;
  color:var(--ink);
  background:
    radial-gradient(circle at top left, rgba(0,86,179,.09), transparent 32rem),
    linear-gradient(180deg,#fbfdff 0%,#f2f6fb 55%,#ffffff 100%);
  min-height:100vh;
}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;height:auto}

header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.88);
  backdrop-filter: blur(16px);
  border-bottom:1px solid rgba(0,86,179,.13);
  box-shadow:0 10px 30px rgba(0,0,0,.045);
}
.header-container{max-width:var(--max);margin:0 auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.logo img{height:48px;width:auto;display:block;object-fit:contain}
nav ul{display:flex;align-items:center;gap:4px;position:relative}
nav ul li{position:relative;margin-left:0}
nav ul li a{display:inline-flex;align-items:center;padding:12px 14px;border-radius:999px;color:#2f3c50;font-size:15px;font-weight:700;transition:.22s ease}
nav ul li a:hover{color:var(--brand-2);background:var(--soft-blue)}
.dropdown-menu{display:block;position:absolute;top:calc(100% + 10px);left:0;min-width:250px;background:rgba(255,255,255,.97);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:16px;padding:10px;opacity:0;visibility:hidden;transform:translateY(8px);transition:.2s ease;z-index:50}
.dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-menu li a{display:block;border-radius:10px;padding:10px 12px;font-size:14px;font-weight:650;color:#26364a}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;box-shadow:var(--shadow-soft);cursor:pointer}
.nav-toggle span{width:20px;height:2px;background:var(--brand);border-radius:2px;display:block}

.hero,.sub-hero,.about-hero{
  position:relative;overflow:hidden;color:#fff;text-align:center;padding:108px 22px;background-size:cover;background-position:center;
}
.hero::before,.sub-hero::before,.about-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,33,73,.86),rgba(0,86,179,.70) 48%,rgba(245,130,32,.42));z-index:0}
.hero::after,.sub-hero::after,.about-hero::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;right:-130px;top:-150px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);z-index:0}
.hero > *,.sub-hero > *,.about-hero > *{position:relative;z-index:1;max-width:880px;margin-left:auto;margin-right:auto}
.hero h1,.sub-hero h1,.about-hero h1{font-size:clamp(34px,5vw,58px);line-height:1.08;font-weight:850;letter-spacing:-.03em;margin-bottom:14px;text-wrap:balance}
.hero p,.sub-hero p,.about-hero p{font-size:clamp(16px,2vw,20px);color:#fff !important;opacity:1;font-weight:700;text-shadow:0 2px 10px rgba(0,0,0,.65),0 1px 2px rgba(0,0,0,.85);letter-spacing:.01em}
.page-index .hero{background-image:url('070.jpg')}
.page-about .about-hero{background-image:url('keyphonesystem.jpg')}
.page-contact .sub-hero{background-image:url('keyphonesystem.jpg')}
.page-nbn .sub-hero{background-image:url('nbn.jpg')}
.page-inbound .sub-hero{background-image:url('inbound.jpg')}
.page-070 .sub-hero,.page-voip .sub-hero{background-image:url('voip.jpg')}
.page-keyphone-system .sub-hero{background-image:url('keyphonesystem.jpg')}
.page-keyphone-programming .sub-hero{background-image:url('programming.jpg')}
.page-special-offer .sub-hero{background-image:url('070_ad.jpg')}

.container,.main-container,.main-content,.about-container{max-width:var(--max);margin:64px auto;padding:0 22px}
.about-container,.master-card,.policy-card,.office-info-box,.offer-master-box,.action-area,.hardware-section{
  background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:clamp(28px,4vw,48px);position:relative;overflow:hidden;
}
.about-container::before,.master-card::before,.policy-card::before,.office-info-box::before,.offer-master-box::before,.action-area::before{content:"";position:absolute;left:0;top:0;width:100%;height:5px;background:linear-gradient(90deg,var(--brand-2),var(--accent))}
.section-title,.table-title,.feature-title,.office-info-box h2,h2,h3,.page-header h2{
  color:var(--brand);font-weight:850;letter-spacing:-.015em;
}
.section-title,.table-title,.feature-title,.office-info-box h2,h3{position:relative;margin:34px 0 18px;padding-left:16px;border-left:5px solid var(--accent)}
.section-title:first-child,.table-title:first-child,h3:first-child{margin-top:0}
.page-header{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft);padding:30px;margin-bottom:28px}
.page-header h2{font-size:32px}
.section-intro,p{color:#3f4b5d}
.section-intro{font-size:16px;margin-bottom:34px}

.features-grid,.value-grid,.offer-features-grid,.feature-grid,.hardware-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.feature-card,.value-card,.feature-box,.hw-card,.highlight-box,.notice-box,.info-box,.details-item{
  background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line);border-radius:var(--radius-sm);box-shadow:var(--shadow-soft);padding:24px;transition:.22s ease;
}
.feature-card:hover,.value-card:hover,.feature-box:hover,.hw-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card-image-box{height:210px;border-radius:16px;overflow:hidden;margin-bottom:22px;background:var(--soft-blue)}
.card-image-box img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease}
.feature-card:hover .card-image-box img{transform:scale(1.045)}
.feature-card h3,.value-card h4,.feature-box h4,.hw-card h5,.highlight-box h4{color:var(--brand);font-weight:850;margin-bottom:10px;line-height:1.3}
.card-link,.email-cta-btn,.cta-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(135deg,var(--brand-2),var(--brand-3));color:#fff!important;border-radius:999px;padding:12px 20px;font-weight:800;box-shadow:0 12px 22px rgba(0,86,179,.18);transition:.22s ease;border:0;margin-top:auto}
.card-link:hover,.email-cta-btn:hover,.cta-button:hover{transform:translateY(-2px);background:linear-gradient(135deg,var(--accent),#d85f00)}
.card-link::after{content:"→"}

.table-title{text-transform:uppercase;font-size:20px}
table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow-soft);margin:18px 0 34px}
th,td{padding:15px 17px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px;vertical-align:top;color:#344258}
th{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:800;letter-spacing:.01em}
tr:last-child td{border-bottom:0}
tbody tr:nth-child(even){background:#f9fbfe}
tbody tr:hover{background:#edf6ff}
.price-text{font-size:17px;font-weight:900;color:var(--accent)}
.badge{display:inline-flex;align-items:center;border-radius:999px;padding:4px 10px;color:#fff;font-size:11px;font-weight:850;margin-right:6px}.badge-res{background:#16a765}.badge-biz{background:#1976d2}.badge-gold{background:#8e44ad}

.guide-list,.policy-list,.sub-list,.sub-ordered-list{margin:14px 0 24px 22px;list-style:disc}.sub-list{list-style:lower-alpha}.sub-ordered-list{list-style:decimal}
.guide-list li,.policy-list li,.sub-list li,.sub-ordered-list li{margin-bottom:9px;color:#425168}.guide-list li::marker{color:var(--accent)}
.info-box,.notice-box{background:#fffaf3;border-color:#ffd8ad}
.formula-box{background:var(--soft-blue);border:1px solid #cfe5ff;border-radius:12px;padding:16px;color:var(--brand);font-weight:800;text-align:center;margin:16px 0}
.details-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin-bottom:28px}.details-item strong{display:block;color:var(--brand);margin-bottom:4px}
.offer-image-container{border-radius:22px;overflow:hidden;box-shadow:var(--shadow);margin:22px auto 42px;max-width:1000px}.offer-image-container img{width:100%;display:block}
.action-banner{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-radius:var(--radius);padding:30px;margin-top:28px}.action-banner *{color:#fff!important}

footer{background:linear-gradient(180deg,#101826,#07111f);color:#c5cfdd;padding:54px 22px;margin-top:70px;border-top:5px solid var(--brand-2)}
.footer-container{max-width:var(--max);margin:0 auto;text-align:center;display:flex;flex-direction:column;gap:18px}.footer-info p{color:#c5cfdd;margin:4px 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;width:100%}.footer-copyright{color:#8fa0b7;font-size:13px;margin-bottom:10px}.footer-policy-links{display:flex;gap:10px 16px;justify-content:center;flex-wrap:wrap}.footer-policy-links a{color:#dbe5f2;font-size:13px}.footer-policy-links a:hover{color:var(--accent-2)}.policy-separator{color:#58677d}

.policy-card h2{font-size:30px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:22px}.company-subtitle{color:var(--muted);font-weight:800;margin-bottom:26px}.clause{margin:12px 0;color:#3f4b5d}

@media (max-width:900px){
 .header-container{padding:10px 16px}.logo img{height:42px}.nav-toggle{display:flex}header nav{position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:12px;display:none}.nav-open header nav{display:block}nav ul{display:block}nav ul li a{width:100%;border-radius:12px;padding:12px}.dropdown-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;background:#f6f9fd;min-width:0;margin:3px 0 8px;padding:6px;display:block}.dropdown-menu li a{font-size:13px}.hero,.sub-hero,.about-hero{padding:78px 18px}.container,.main-container,.main-content,.about-container{margin:42px auto;padding:0 16px}.about-container,.master-card,.policy-card,.office-info-box,.offer-master-box,.action-area,.hardware-section{padding:24px;border-radius:16px}.features-grid,.value-grid,.offer-features-grid,.feature-grid,.hardware-grid{grid-template-columns:1fr}table{display:block;overflow-x:auto;white-space:normal}th,td{min-width:130px}.details-list{grid-template-columns:1fr}
}
@media (max-width:520px){.hero h1,.sub-hero h1,.about-hero h1{font-size:32px}.card-image-box{height:170px}.page-header h2,.policy-card h2{font-size:24px}}


@media (max-width:900px){
 .language-switch{top:6px;right:10px;font-size:11px;padding:5px 8px}
 .header-container{padding-top:26px}
}

/* Registration/Application buttons */
.action-button-group{
  display:flex;
  justify-content:center;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  margin-top:10px;
}
.apply-cta-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  background:linear-gradient(135deg,var(--accent),#d85f00);
  color:#fff!important;
  border-radius:999px;
  padding:12px 20px;
  font-weight:800;
  box-shadow:0 12px 22px rgba(245,130,32,.22);
  transition:.22s ease;
  border:0;
}
.apply-cta-btn:hover{
  transform:translateY(-2px);
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));
}
@media (max-width:520px){
  .action-button-group a{width:100%;}
}