@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css");
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+KR:wght@300;400;500;700;900&family=Outfit:wght@400;600;700;800&display=swap');

:root {
  --kt-red: #e60012;
  --kt-red-hover: #b8000e;
  --kt-blue: #0056e0;
  --kt-blue-light: #00c2ff;
  --kt-navy: #000f24;
  --kt-navy-light: #002FA7;
  --kt-bg-dark: #020b18;
  --kt-gray-100: #f8f9fa;
  --kt-gray-200: #e9ecef;
  --kt-gray-300: #dee2e6;
  --kt-gray-600: #6c757d;
  --kt-gray-800: #212529;
  --font-base: Pretendard, system-ui, -apple-system, sans-serif;
  --font-title: Pretendard, system-ui, -apple-system, sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  font-family: var(--font-base);
  background-color: #ffffff;
  color: #333333;
  overflow-x: clip;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

/* Base Layout Modifications */
.main-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.content-body {
  flex-grow: 1;
}

/* Header & Utility styles */
.top-utility-bar {
  background-color: #ffffff;
  border-bottom: none;
  font-size: 11px;
  color: #888888;
  padding: 12px 24px 4px;
  max-width: 1400px;
  margin: 0 auto;
}

.top-utility-bar a {
  color: #888888;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.top-utility-bar a:hover {
  color: #111111;
}

.top-utility-bar span.separator {
  color: #dddddd;
  margin: 0 10px;
}

.main-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  z-index: 1000;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.03);
  transition: var(--transition-smooth);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  font-family: var(--font-base);
  font-weight: 700;
  font-size: 24px;
  text-decoration: none;
  color: #111111;
}

.brand-logo .logo-kt {
  color: var(--kt-red);
  margin-right: 4px;
  font-weight: 900;
}

.brand-logo .logo-ent {
  font-weight: 700;
  color: #111111;
}

.nav-menu-list {
  display: flex;
  list-style: none;
  gap: 50px;
  margin: 0;
  padding: 0;
}

@media (max-width: 1024px) {
  .nav-menu-list {
    display: none;
    /* Toggle handled by responsive JS / bootstrap classes if needed, here we build a custom flex navbar */
  }
}

.nav-menu-list .nav-menu-item a {
  display: inline-block;
  font-size: 16px;
  font-weight: 700;
  color: #111111;
  text-decoration: none;
  position: relative;
  padding: 24px 0;
  transition: var(--transition-smooth);
}

.nav-menu-list .nav-menu-item a:hover {
  color: #002FA7;
}

.nav-menu-list .nav-menu-item a::after {
  content: '';
  position: absolute;
  bottom: 1px;
  left: 0;
  width: 0;
  height: 3px;
  background-color: #002FA7;
  transition: var(--transition-smooth);
}

.nav-menu-list .nav-menu-item a:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-search-icon,
.btn-menu-icon {
  background: none;
  border: none;
  color: #444;
  font-size: 18px;
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  transition: var(--transition-smooth);
}

.btn-search-icon:hover,
.btn-menu-icon:hover {
  background-color: #f1f3f5;
  color: #111;
}

.btn-inquire {
  background-color: #002FA7;
  color: #ffffff;
  border: none;
  border-radius: 4px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-inquire:hover {
  background-color: #00237e;
  color: #ffffff;
}

/* Hero Section Styles */
.hero-section {
  position: relative;
  background: radial-gradient(120% 140% at 78% 12%, rgb(21, 50, 122) 0%, rgb(10, 28, 77) 42%, rgb(5, 15, 48) 100%);
  overflow: hidden;
}

.hero-mesh {
  position: absolute;
  inset: 0px;
  background-image: radial-gradient(rgba(120, 170, 255, 0.16) 1.1px, transparent 1.1px);
  background-size: 26px 26px;
  opacity: 0.7;
}

.hero-glow-1 {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(40, 90, 220, 0.55), transparent 65%);
  filter: blur(10px);
}

.hero-glow-2 {
  position: absolute;
  bottom: -160px;
  left: 40%;
  width: 600px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20, 40, 160, 0.4), transparent 68%);
}

.hero-container {
  position: relative;
  max-width: 1320px;
  margin: 0px auto;
  padding: 108px 32px 116px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 40px;
}

@media (max-width: 991px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 80px 24px;
  }
}

.hero-left {
  animation: 0.7s ease 0s 1 normal both running ktFadeUp;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.4px;
  color: rgb(159, 192, 255);
  border: 1px solid rgba(120, 160, 255, 0.35);
  border-radius: 999px;
  padding: 7px 16px;
}

.hero-title {
  margin: 24px 0px 0px;
  font-size: 54px;
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -1.6px;
  color: rgb(255, 255, 255);
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 38px;
  }
}

.hero-title span {
  color: rgb(125, 166, 255);
}

.hero-description {
  margin: 24px 0px 0px;
  font-size: 18px;
  line-height: 1.65;
  color: rgb(195, 205, 226);
  max-width: 480px;
}

@media (max-width: 991px) {
  .hero-description {
    margin: 24px auto 0px;
  }
}

.hero-buttons {
  margin-top: 38px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 991px) {
  .hero-buttons {
    justify-content: center;
  }
}

.btn-hero-primary.scp3 {
  background: rgb(255, 255, 255);
  color: rgb(10, 28, 77);
  font-size: 15px;
  font-weight: 700;
  padding: 15px 30px;
  border-radius: 5px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
}

.btn-hero-secondary.scp4 {
  background: rgba(255, 255, 255, 0.08);
  color: rgb(255, 255, 255);
  font-size: 15px;
  font-weight: 600;
  padding: 15px 30px;
  border-radius: 5px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  cursor: pointer;
  text-decoration: none;
}

.hero-right {
  position: relative;
  height: 380px;
  animation: 0.9s ease 0s 1 normal both running ktFadeUp;
}

@media (max-width: 991px) {
  .hero-right {
    height: 340px;
    margin-top: 40px;
  }
}

.glass-info-card {
  position: absolute;
  padding: 22px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(150, 180, 255, 0.22);
  backdrop-filter: blur(6px);
}

.glass-info-card-1 {
  top: 12px;
  right: 0px;
  width: 260px;
  animation: 6s ease-in-out 0s infinite normal none running ktFloat;
}

.glass-info-card-2 {
  bottom: 24px;
  left: 8px;
  width: 240px;
  animation: 6s ease-in-out 1.4s infinite normal none running ktFloat;
}

@media (max-width: 991px) {
  .glass-info-card-1 {
    right: 15%;
  }

  .glass-info-card-2 {
    left: 15%;
  }
}

@media (max-width: 500px) {
  .glass-info-card-1 {
    right: 5%;
    width: 200px;
  }

  .glass-info-card-2 {
    left: 5%;
    width: 200px;
  }
}

.glass-card-tag {
  font-size: 13px;
  color: rgb(159, 192, 255);
  font-weight: 600;
}

.glass-card-value {
  font-size: 40px;
  font-weight: 800;
  color: rgb(255, 255, 255);
  letter-spacing: -1px;
  margin-top: 6px;
}

.glass-card-value span {
  font-size: 20px;
  font-weight: 600;
}

.glass-card-desc {
  font-size: 12.5px;
  color: rgb(182, 194, 219);
  margin-top: 6px;
  line-height: 1.5;
}

/* Core Solutions Section */
.solutions-section {
  padding: 100px 24px;
  background-color: #ffffff;
}

.section-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px;
}

.section-tag {
  color: var(--kt-navy-light);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 15px;
  color: #666666;
}

.solutions-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

@media (max-width: 991px) {
  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .solutions-grid {
    grid-template-columns: 1fr;
  }
}

.solution-card {
  background-color: #ffffff;
  border: 1px solid #eef1f5;
  border-radius: 12px;
  padding: 36px;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 280px;
  cursor: pointer;
}

.solution-card:hover {
  box-shadow: rgba(20, 40, 160, 0.5) 0px 18px 36px -22px;
  transform: translateY(-4px);
}

.solution-card-top {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.solution-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background-color: #f3f6fc;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--kt-navy-light);
  font-size: 20px;
  transition: var(--transition-smooth);
}

.solution-card:hover .solution-icon-wrap {
  background-color: var(--kt-navy-light);
  color: #ffffff;
}

.solution-card-title {
  font-size: 18px;
  font-weight: 700;
  color: #222222;
}

.solution-card-desc {
  font-size: 13px;
  color: #666666;
  line-height: 1.6;
}

.solution-card-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--kt-navy-light);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-smooth);
}

.solution-card-link span {
  font-size: 14px;
}

.solution-card:hover .solution-card-link {
  color: var(--kt-navy);
}

/* Why KT Section */
.why-section {
  margin-top: 72px;
  position: relative;
  background: linear-gradient(120deg, rgb(10, 28, 77), rgb(16, 31, 87) 55%, rgb(21, 42, 110));
  overflow: hidden;
}

.why-mesh {
  position: absolute;
  inset: 0px;
  background-image: radial-gradient(rgba(120, 170, 255, 0.14) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.6;
}

.why-container {
  position: relative;
  max-width: 1320px;
  margin: 0px auto;
  padding: 74px 32px;
}

.why-header {
  text-align: center;
  color: rgb(255, 255, 255);
}

.why-tag {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: rgb(159, 192, 255);
}

.why-title {
  margin: 14px 0px 0px;
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -1px;
}

.why-grid {
  margin-top: 50px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 991px) {
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .why-grid {
    grid-template-columns: 1fr;
  }
}

.why-item {
  text-align: center;
  padding: 8px 12px;
  border-left: 1px solid rgba(150, 180, 255, 0.2);
}

@media (max-width: 500px) {
  .why-item {
    border-left: none;
    border-top: 1px solid rgba(150, 180, 255, 0.2);
    padding: 16px 12px;
  }
}

.why-metric {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -1.5px;
  color: rgb(255, 255, 255);
}

.why-metric-unit {
  font-size: 22px;
  font-weight: 600;
  color: rgb(159, 192, 255);
}

.why-label {
  margin-top: 10px;
  font-size: 15px;
  font-weight: 600;
  color: rgb(219, 227, 244);
}

.why-desc {
  margin-top: 5px;
  font-size: 12.5px;
  color: rgb(154, 166, 196);
}

/* Contact Banner */
.contact-section {
  background-color: #04122c;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 24px;
  color: #ffffff;
}

.contact-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

@media (max-width: 768px) {
  .contact-container {
    flex-direction: column;
    text-align: center;
  }
}

.contact-left {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.contact-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--kt-blue-light);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-title {
  font-size: 24px;
  font-weight: 700;
}

.btn-contact {
  background-color: #ffffff;
  color: #04122c;
  border: none;
  padding: 14px 32px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-contact:hover {
  background-color: var(--kt-red);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Footer Section */
.main-footer {
  background-color: #0b0f19;
  color: #8fa0b5;
  padding: 60px 24px 40px;
  font-size: 13px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-top-row {
  max-width: 1400px;
  margin: 0 auto 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 24px;
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

.footer-links a {
  color: #8fa0b5;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-links a.privacy-link {
  color: #ffffff;
  font-weight: 700;
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-social-btn {
  background: rgb(15, 17, 20);
  border: 1px solid rgb(44, 46, 51);
  border-radius: 5px;
  padding: 9px 16px;
  font-size: 13px;
  color: rgb(207, 211, 217);
  cursor: pointer;
  font-size: 12px;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.footer-social-btn:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.footer-bottom-row {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
}

@media (max-width: 768px) {
  .footer-bottom-row {
    flex-direction: column;
  }
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-logo {
  display: flex;
  align-items: center;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 18px;
  color: #ffffff;
  text-decoration: none;
}

.footer-logo span {
  color: var(--kt-red);
}

.footer-company-details {
  line-height: 1.8;
  color: #5c6f84;
}

.footer-copyright {
  color: #435263;
  margin-top: 12px;
}

.footer-dropdown-wrap {
  position: relative;
  display: inline-block;
}

.footer-dropdown-btn {
  background: rgb(15, 17, 20);
  border: 1px solid rgb(44, 46, 51);
  border-radius: 5px;
  padding: 9px 16px;
  font-size: 13px;
  color: rgb(207, 211, 217);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  transition: var(--transition-smooth);
}

.footer-dropdown-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.footer-dropdown-menu {
  position: absolute;
  bottom: 100%;
  right: 0;
  margin-bottom: 8px;
  background-color: #121824;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  width: 180px;
  box-shadow: 0 -10px 25px rgba(0, 0, 0, 0.3);
  display: none;
  flex-direction: column;
  z-index: 100;
  overflow: hidden;
}

.footer-dropdown-menu.active {
  display: flex;
}

.footer-dropdown-link {
  color: #8fa0b5;
  padding: 10px 16px;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.footer-dropdown-link:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

/* Consultation request modal styling */
.kt-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(2, 11, 24, 0.85);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

.kt-modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.kt-modal-container {
  background-color: #0d1726;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  width: 90%;
  max-width: 550px;
  padding: 40px;
  color: #ffffff;
  transform: scale(0.9);
  transition: var(--transition-smooth);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  position: relative;
}

.kt-modal-backdrop.active .kt-modal-container {
  transform: scale(1);
}

.kt-modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  color: #a0aec0;
  font-size: 24px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.kt-modal-close:hover {
  color: #ffffff;
}

.kt-modal-header {
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 16px;
}

.kt-modal-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.kt-modal-desc {
  font-size: 13px;
  color: #a0aec0;
}

.kt-form-group {
  margin-bottom: 20px;
}

.kt-form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #a0aec0;
}

.kt-form-input,
.kt-form-select,
.kt-form-textarea {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  padding: 12px 16px;
  color: #ffffff;
  font-size: 14px;
  transition: var(--transition-smooth);
}

.kt-form-select option {
  background-color: #0d1726;
  color: #ffffff;
}

.kt-form-input:focus,
.kt-form-select:focus,
.kt-form-textarea:focus {
  outline: none;
  border-color: var(--kt-blue-light);
  background-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 4px rgba(0, 194, 255, 0.15);
}

.kt-form-textarea {
  height: 100px;
  resize: none;
}

.kt-form-submit {
  width: 100%;
  background-color: var(--kt-blue);
  color: #ffffff;
  border: none;
  padding: 14px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-smooth);
  margin-top: 10px;
}

.kt-form-submit:hover {
  background-color: var(--kt-red);
}

/* Animations from Design */
@keyframes ktFadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes ktFloat {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

/* Leased Line Page Styles */
.page-wrapper {
  background-color: #ffffff;
  color: #333333;
}

.page-hero {
  position: relative;
  height: 260px;
  background-size: cover;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-leased-line {
  background-image: linear-gradient(to right, rgba(1, 6, 21, 0.95) 0%, rgba(1, 6, 21, 0.7) 40%, rgba(1, 6, 21, 0.2) 100%), url('/images/hero_bg.png');
}

.hero-biz-internet {
  background-image: linear-gradient(to right, rgba(1, 6, 21, 0.95) 0%, rgba(1, 6, 21, 0.7) 40%, rgba(1, 6, 21, 0.2) 100%), url('/images/internet_hero_bg.png');
}

.page-hero-mesh {
  position: absolute;
  inset: 0px;
  background-image: radial-gradient(rgba(120, 170, 255, 0.16) 1.1px, transparent 1.1px);
  background-size: 26px 26px;
  opacity: 0.7;
}

.page-hero-glow {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(40, 90, 220, 0.55), transparent 65%);
  filter: blur(10px);
  pointer-events: none;
}

.page-hero-content {
  position: relative;
  max-width: 1320px;
  width: 100%;
  margin: 0px auto;
  padding: 0px 32px;
  display: flex;
  flex-direction: column;
}

.page-hero-title {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -1px;
  color: #ffffff;
}

.page-hero-subtitle {
  font-size: 18px;
  font-weight: 500;
  color: #ffffff;
  margin-top: 10px;
  letter-spacing: -0.5px;
  opacity: 0.85;
}

/* Sub Navigation Bar */
.page-subnav {
  background-color: #121417;
  border-bottom: 1px solid #222222;
  position: sticky;
  top: 72px;
  z-index: 999;
}

.page-subnav-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}

.page-subnav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  height: 100%;
}

.page-subnav-item {
  height: 100%;
}

.page-subnav-item a {
  display: flex;
  align-items: center;
  padding: 0 24px;
  height: 100%;
  color: #a0a5b0;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.page-subnav-item.active a {
  background-color: #18296d;
  color: #ffffff;
}

.page-subnav-item a:hover:not(.active) {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.05);
}

.page-subnav-actions {
  display: flex;
  gap: 16px;
  color: #a0a0a0;
}

.page-subnav-btn {
  background: none;
  border: none;
  color: #a0a0a0;
  cursor: pointer;
  padding: 4px;
  transition: var(--transition-smooth);
}

.page-subnav-btn:hover {
  color: #ffffff;
}

/* Breadcrumbs */
.page-breadcrumbs-section {
  background-color: #f5f5f5;
  border-bottom: 1px solid #e5e5e5;
  padding: 14px 0;
}

.page-breadcrumbs-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: flex-end;
}

.page-breadcrumbs {
  font-size: 12px;
  color: #777777;
}

.page-breadcrumbs a {
  color: #777777;
  text-decoration: none;
}

.page-breadcrumbs a:hover {
  text-decoration: underline;
}

.page-breadcrumbs span.active {
  color: var(--kt-navy-light);
  font-weight: 700;
}

/* Page Intro */
.page-intro-section {
  padding: 80px 0 60px;
  text-align: center;
  background-color: #ffffff;
}

.page-intro-text {
  max-width: 900px;
  margin: 0 auto;
  font-size: 26px;
  font-weight: 600;
  line-height: 1.6;
  color: #111111;
  word-break: keep-all;
}

/* Service Architecture */
.page-architecture-section {
  padding: 20px 0 80px;
  background-color: #ffffff;
}

.page-section-title {
  font-size: 24px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 24px;
  max-width: 1320px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 32px;
}

.page-cards-grid {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.page-card {
  background-color: #f5f7fc;
  border-radius: 12px;
  padding: 40px;
  border: 1px solid #e9edf5;
  transition: var(--transition-smooth);
}

.page-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.04);
}

.page-card-title {
  font-size: 20px;
  font-weight: 800;
  color: #111111;
  line-height: 1.4;
  margin-bottom: 16px;
  word-break: keep-all;
}

.page-card-title span.highlight {
  color: var(--kt-navy-light);
}

.page-card-desc {
  font-size: 18px;
  color: #555555;
  line-height: 1.6;
  word-break: keep-all;
}

/* Interactive Map Diagram Styles */
.leased-map-container {
  max-width: 1320px;
  margin: 50px auto 0;
  padding: 0 32px;
  position: relative;
  min-height: 500px;
}

.leased-map-bg-svg {
  position: absolute;
  inset: 0px;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.leased-map-bubble {
  position: absolute;
  background-color: #ffffff;
  border: 1.5px solid #e2e8f0;
  border-radius: 50%;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: #4a5568;
  line-height: 1.4;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.03);
  word-break: keep-all;
  z-index: 10;
  transition: var(--transition-smooth);
}

.leased-map-bubble:hover {
  transform: scale(1.05);
  border-color: var(--kt-navy-light);
  color: var(--kt-navy-light);
  box-shadow: 0 8px 20px rgba(0, 47, 167, 0.15);
}

/* Coordinates matching SVG dashed lines starting/ending points */
.bubble-left-1 {
  left: 120px;
  top: 50px;
}

.bubble-left-2 {
  left: 120px;
  top: 300px;
}

.bubble-right-1 {
  right: 120px;
  top: 50px;
}

.bubble-right-2 {
  right: 120px;
  top: 190px;
}

.bubble-right-3 {
  right: 120px;
  top: 330px;
}

.leased-map-center-overlay {
  position: absolute;
  width: 180px;
  height: 180px;
  background-color: #ffffff;
  border-radius: 50%;
  border: 4px solid var(--kt-blue-light);
  box-shadow: 0 10px 30px rgba(0, 194, 255, 0.2);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 5;
  left: 610px;
  top: 40px;
}

.leased-map-mesh-svg {
  width: 90%;
  height: 90%;
}

/* Why KT Banner */
.page-why-section {
  margin-bottom: 60px;
  padding: 60px 0;
  background-color: #ffffff;
}

.page-why-title {
  text-align: center;
  font-size: 24px;
  font-weight: 700;
  color: #333333;
  margin-bottom: 30px;
  letter-spacing: 0.5px;
}

.page-why-banner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 50px 32px;
  border-radius: 12px;
  background: radial-gradient(120% 120% at 30% 20%, rgb(10, 20, 50) 0%, rgb(2, 6, 20) 70%, rgb(0, 2, 8) 100%);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
  overflow: hidden;
}

.page-why-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.page-why-col {
  text-align: center;
  color: #ffffff;
  position: relative;
  z-index: 2;
}

.page-why-col:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -20px;
  top: 15%;
  height: 70%;
  width: 1px;
  background-color: rgba(255, 255, 255, 0.15);
}

.page-why-col-title {
  font-size: 20px;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 16px;
  word-break: keep-all;
}

.page-why-separator {
  width: 20px;
  height: 2px;
  background-color: rgba(255, 255, 255, 0.3);
  margin: 0 auto 20px;
}

.page-why-col-desc {
  font-size: 15px;
  color: #a0aec0;
  line-height: 1.6;
  word-break: keep-all;
}

/* Related Services */
.page-related-section {
  padding: 60px 0 80px;
  background-color: #ffffff;
}

.page-related-title {
  text-align: center;
  font-size: 24px;
  font-weight: 700;
  color: #333333;
  margin-bottom: 40px;
}

.page-related-grid {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.page-related-card {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
  border: 1px solid #f0f0f0;
  background-color: #ffffff;
  transition: var(--transition-smooth);
}

.page-related-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 15px 30px rgba(0, 47, 167, 0.08);
  border-color: rgba(0, 47, 167, 0.15);
}

.page-related-img-wrap {
  height: 200px;
  position: relative;
  background: linear-gradient(135deg, #051430 0%, #010614 100%);
  display: flex;
  justify-content: center;
  align-items: center;
}

.leased-related-img-overlay {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 15px 15px;
}

.page-related-info {
  padding: 24px;
}

.page-related-card-title {
  font-size: 20px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 12px;
}

.page-related-card-desc {
  font-size: 16px;
  color: #666666;
  line-height: 1.5;
  word-break: keep-all;
}

.page-related-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Insight Section */
.leased-insight-section {
  padding: 60px 0 80px;
  background-color: #ffffff;
}

.leased-insight-title {
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: #333333;
  margin-bottom: 40px;
}

.leased-insight-grid {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.leased-insight-card {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
  border: 1px solid #f0f0f0;
  background-color: #ffffff;
  transition: var(--transition-smooth);
}

.leased-insight-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 47, 167, 0.1);
}

.leased-insight-img-wrap {
  height: 200px;
  overflow: hidden;
}

.leased-insight-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.leased-insight-card:hover .leased-insight-card-img {
  transform: scale(1.05);
}

.leased-insight-info {
  padding: 24px;
}

.leased-insight-tag {
  font-size: 12px;
  color: #888888;
  margin-bottom: 8px;
}

.leased-insight-card-title {
  font-size: 15px;
  font-weight: 700;
  color: #111111;
  line-height: 1.4;
  margin: 0;
  word-break: keep-all;
}

.leased-insight-btn-wrap {
  text-align: center;
  margin-top: 40px;
}

.leased-insight-more-btn {
  border: 1px solid #cccccc;
  background: none;
  color: #333333;
  padding: 10px 32px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.leased-insight-more-btn:hover {
  border-color: var(--kt-navy-light);
  color: var(--kt-navy-light);
}

/* Bottom CTA Banner */
.page-bottom-cta {
  padding: 60px 32px;
  background: linear-gradient(135deg, rgb(1, 6, 20) 0%, rgb(4, 16, 48) 50%, rgb(1, 5, 18) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-bottom-cta-mesh {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(120, 170, 255, 0.05) 1.2px, transparent 1.2px);
  background-size: 24px 24px;
  opacity: 0.6;
}

.page-bottom-cta-container {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.page-bottom-cta-text {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 50px;
  letter-spacing: -0.5px;
}

.page-bottom-cta-btn {
  background-color: #ffffff;
  color: #020818;
  border: none;
  border-radius: 6px;
  padding: 14px 36px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.page-bottom-cta-btn:hover {
  background-color: var(--kt-navy-light);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(0, 47, 167, 0.4);
}
/* ==========================================================================
   Corporate Internet (기업인터넷) Page Styles
   ========================================================================== */
/* GiGA Office row */
.internet-giga-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  max-width: 1200px;
  margin: 60px auto 0;
  padding: 0 32px;
  align-items: center;
}

.internet-giga-img-wrap {
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  border: 1px solid #e2e8f0;
}

.internet-giga-img {
  width: 100%;
  display: block;
}

.internet-giga-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.internet-giga-title {
  font-size: 26px;
  font-weight: 800;
  color: #111111;
  line-height: 1.4;
  margin-bottom: 20px;
  word-break: keep-all;
}

.internet-giga-desc {
  font-size: 16px;
  color: #555555;
  line-height: 1.7;
  word-break: keep-all;
}

/* Success Cases Section */
.internet-success-section {
  background-color: #ffffff;
  padding: 80px 0;
}

.internet-success-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  max-width: 1200px;
  margin: 0 auto 80px;
  padding: 0 32px;
  align-items: center;
}

.internet-success-row.reversed {
  grid-template-columns: 1fr 1.2fr;
}

.internet-video-wrap {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  border: 1px solid #e2e8f0;
}

.internet-video-img {
  width: 100%;
  display: block;
  transition: transform 0.5s ease;
}

.internet-video-wrap:hover .internet-video-img {
  transform: scale(1.03);
}

.internet-play-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-smooth);
}

.internet-video-wrap:hover .internet-play-overlay {
  background-color: rgba(0, 0, 0, 0.3);
}

.internet-play-btn {
  width: 60px;
  height: 60px;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-smooth);
}

.internet-video-wrap:hover .internet-play-btn {
  transform: scale(1.1);
}

.internet-play-icon {
  width: 0;
  height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 16px solid #111111;
  margin-left: 4px;
}

.internet-success-info {
  display: flex;
  flex-direction: column;
}

.internet-success-cat {
  font-size: 14px;
  font-weight: 700;
  color: var(--kt-blue-light);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.internet-success-title {
  font-size: 28px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 8px;
}

.internet-success-subtitle {
  font-size: 18px;
  font-weight: 700;
  color: #4a5568;
  margin-bottom: 20px;
  word-break: keep-all;
}

.internet-success-desc {
  font-size: 16px;
  color: #555555;
  line-height: 1.7;
  word-break: keep-all;
}

.internet-architecture-section .page-card-img {
  height: 90px;
  margin-bottom: 20px;
}

.net-diagram-left {
  display: flex;
  align-items: center;
  flex: 1.3;
}

.diagram-node {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 4px solid #5cb3ff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #333333;
  background-color: #ffffff;
  box-shadow: 0 4px 15px rgba(0, 162, 255, 0.1);
  flex-shrink: 0;
}

.diagram-arrows {
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
  margin: 0 10px;
}

.diagram-arrow-row {
  position: relative;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-arrow-row .arrow-pill {
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
  padding: 3px 16px;
  border-radius: 12px;
  z-index: 2;
}

.gray-arrow .arrow-pill {
  background-color: #1a2f6b; /* Dark navy gray */
}

.blue-arrow .arrow-pill {
  background-color: #0b1d3d; /* Dark navy */
}

.arrow-line-right {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #ccd6e0;
  z-index: 1;
}

.arrow-line-right::after {
  content: '';
  position: absolute;
  right: -2px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-top: 2px solid #ccd6e0;
  border-right: 2px solid #ccd6e0;
  transform: rotate(45deg);
}

.blue-arrow .arrow-line-right-double {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #1a2f6b;
  z-index: 1;
}

.blue-arrow .arrow-line-right-double::after {
  content: '';
  position: absolute;
  right: -2px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-top: 2px solid #1a2f6b;
  border-right: 2px solid #1a2f6b;
  transform: rotate(45deg);
}

.blue-arrow-reverse .arrow-line-left {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #1a2f6b;
  z-index: 1;
}

.blue-arrow-reverse .arrow-line-left::after {
  content: '';
  position: absolute;
  left: -2px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-bottom: 2px solid #1a2f6b;
  border-left: 2px solid #1a2f6b;
  transform: rotate(45deg);
}

.net-diagram-right {
  flex: 1;
  margin-left: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.services-box {
  border: 1px solid #ccd6e0;
  background-color: #ffffff;
  border-radius: 12px;
  padding: 30px 40px;
  width: 100%;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
  text-align: center;
}

.services-box-title {
  font-size: 16px;
  font-weight: 700;
  color: #333333;
  margin-bottom: 20px;
}

.services-items {
  font-size: 15px;
  color: #555555;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.services-items .dot {
  color: #a0aec0;
  font-weight: bold;
}

.services-box-caption {
  font-size: 13px;
  color: #718096;
  margin-top: 12px;
  text-align: center;
  font-weight: 500;
}

@media (max-width: 768px) {
  .net-diagram-container {
    flex-direction: column;
    gap: 40px;
  }
  .net-diagram-right {
    margin-left: 0;
    width: 100%;
  }
  .net-diagram-left {
    width: 100%;
  }
}

/* ==========================================================================
   Corporate Internet Architecture Diagram and Card Customization
   ========================================================================== */
.internet-architecture-section .page-card {
  background-color: #f5f6fa;
  border: none;
  box-shadow: none;
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.internet-architecture-section .page-card-img {
  height: 190px;
  width: auto;
  margin-bottom: 24px;
  display: inline-block;
}

.internet-diagram-wrap {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
}

.internet-diagram-title {
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  line-height: 1.4;
  margin-bottom: 12px;
  word-break: keep-all;
}

/* Network Diagram HTML/CSS */
.net-diagram-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1024px;
  margin: 50px auto 20px;
  padding: 0 32px;
}

.net-diagram-left {
  display: flex;
  align-items: center;
  flex: 1.3;
}

.diagram-node {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 4px solid #5cb3ff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #333333;
  background-color: #ffffff;
  box-shadow: 0 4px 15px rgba(0, 162, 255, 0.1);
  flex-shrink: 0;
}

.diagram-arrows {
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
  margin: 0 10px;
}

.diagram-arrow-row {
  position: relative;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-arrow-row .arrow-pill {
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
  padding: 3px 16px;
  border-radius: 12px;
  z-index: 2;
}

.gray-arrow .arrow-pill {
  background-color: #1a2f6b; /* Dark navy gray */
}

.blue-arrow .arrow-pill {
  background-color: #0b1d3d; /* Dark navy */
}

.arrow-line-right {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #ccd6e0;
  z-index: 1;
}

.arrow-line-right::after {
  content: '';
  position: absolute;
  right: -2px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-top: 2px solid #ccd6e0;
  border-right: 2px solid #ccd6e0;
  transform: rotate(45deg);
}

.blue-arrow .arrow-line-right-double {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #1a2f6b;
  z-index: 1;
}

.blue-arrow .arrow-line-right-double::after {
  content: '';
  position: absolute;
  right: -2px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-top: 2px solid #1a2f6b;
  border-right: 2px solid #1a2f6b;
  transform: rotate(45deg);
}

.blue-arrow-reverse .arrow-line-left {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #1a2f6b;
  z-index: 1;
}

.blue-arrow-reverse .arrow-line-left::after {
  content: '';
  position: absolute;
  left: -2px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-bottom: 2px solid #1a2f6b;
  border-left: 2px solid #1a2f6b;
  transform: rotate(45deg);
}

.net-diagram-right {
  flex: 1;
  margin-left: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.services-box {
  border: 1px solid #ccd6e0;
  background-color: #ffffff;
  border-radius: 12px;
  padding: 30px 40px;
  width: 100%;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
  text-align: center;
}

.services-box-title {
  font-size: 16px;
  font-weight: 700;
  color: #333333;
  margin-bottom: 20px;
}

.services-items {
  font-size: 15px;
  color: #555555;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.services-items .dot {
  color: #a0aec0;
  font-weight: bold;
}

.services-box-caption {
  font-size: 13px;
  color: #718096;
  margin-top: 12px;
  text-align: center;
  font-weight: 500;
}

@media (max-width: 768px) {
  .net-diagram-container {
    flex-direction: column;
    gap: 40px;
  }
  .net-diagram-right {
    margin-left: 0;
    width: 100%;
  }
  .net-diagram-left {
    width: 100%;
  }
}

/* ==========================================================================
   Enterprise 5G (기업전용5G) Page Styles
   ========================================================================== */

/* 5G Hero Overlay */
.hero-biz-5g {
  background-image: linear-gradient(to right, rgba(1, 6, 21, 0.95) 0%, rgba(1, 6, 21, 0.75) 45%, rgba(0, 47, 167, 0.4) 100%), url('/images/hero_bg.png');
}

/* Subnav Phone Contact */
.subnav-phone-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #4facfe;
  font-weight: 700;
  font-size: 14px;
  margin-right: 15px;
}

.subnav-phone-icon {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* Service Configuration 5G Cards */
.biz5g-cards-container {
  display: flex;
  flex-direction: column;
  gap: 36px;
  max-width: 1200px;
  margin: 0 auto 50px;
  padding: 0 20px;
}

.biz5g-cards-row {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.biz5g-card {
  flex: 1 1 320px;
  max-width: 360px;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 40px 24px 30px;
  position: relative;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.biz5g-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 47, 167, 0.08);
}

.biz5g-card-num {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #002FA7;
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 2px;
  box-shadow: 0 2px 6px rgba(0, 47, 167, 0.2);
}

.biz5g-card-title {
  font-size: 19px;
  font-weight: 700;
  color: #002FA7;
  margin-bottom: 8px;
  margin-top: 10px;
}

.biz5g-card-subtitle {
  font-size: 15px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 12px;
}

.biz5g-card-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
}

/* Network Diagram (구성도) */
.biz5g-diagram-outer {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.02);
  overflow: hidden;
  max-width: 1100px;
  margin: 0 auto;
}

.biz5g-diagram-header {
  background-color: #12285a;
  color: #ffffff;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  padding: 16px;
}

.biz5g-diagram-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr 1.2fr;
  gap: 10px;
  padding: 60px 40px;
  position: relative;
}

@media (max-width: 991px) {
  .biz5g-diagram-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 20px;
  }
}

.diagram-column {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  gap: 30px;
  position: relative;
}

.diagram-entity {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  width: 100%;
}

.entity-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
  transition: transform 0.3s ease;
}

.entity-circle:hover {
  transform: scale(1.05);
}

.entity-circle svg {
  width: 36px;
  height: 36px;
}

.entity-circle.blue {
  background-color: #e6f3ff;
  border: 2px solid #63b3ed;
  color: #2b6cb0;
}

.entity-circle.gray {
  background-color: #f7fafc;
  border: 2px solid #cbd5e0;
  color: #718096;
}

.entity-label {
  font-size: 14px;
  font-weight: 700;
  color: #333333;
}

.entity-icon-tower {
  width: 50px;
  height: 50px;
  background-color: #ffffff;
  border: 1.5px solid #2b6cb0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #2b6cb0;
  margin-bottom: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.entity-icon-tower svg {
  width: 24px;
  height: 24px;
}

.entity-icon-tower.gray {
  border-color: #718096;
  color: #718096;
}

/* Connection Lines for Desktop Grid */
@media (min-width: 992px) {
  .column-antenna .entity-row-1 .connector-line-blue {
    position: absolute;
    right: 75%;
    top: 25px;
    width: 140px;
    height: 1.5px;
    background-color: #63b3ed;
  }
  
  .column-antenna .entity-row-2 .connector-line-blue {
    position: absolute;
    right: 75%;
    top: 25px;
    width: 140px;
    height: 1.5px;
    background-color: #63b3ed;
  }
  
  .column-antenna .entity-row-3 .connector-line-gray {
    position: absolute;
    right: 75%;
    top: 25px;
    width: 140px;
    height: 1.5px;
    background-color: #cbd5e0;
  }
  
  .column-antenna .entity-row-1 .connector-line-blue-diag-down {
    position: absolute;
    left: 70%;
    top: 25px;
    width: 120px;
    height: 1.5px;
    background-color: #63b3ed;
    transform: rotate(20deg);
    transform-origin: left top;
  }
  
  .column-antenna .entity-row-2 .connector-line-blue-diag-up {
    position: absolute;
    left: 70%;
    top: 25px;
    width: 120px;
    height: 1.5px;
    background-color: #63b3ed;
    transform: rotate(-20deg);
    transform-origin: left bottom;
  }
  
  .column-antenna .entity-row-3 .connector-line-gray {
    position: absolute;
    left: 70%;
    top: 25px;
    width: 120px;
    height: 1.5px;
    background-color: #cbd5e0;
  }
  
  .column-gateways .gateway-enterprise .connector-line-blue {
    position: absolute;
    left: 100%;
    top: 40px;
    width: 110px;
    height: 1.5px;
    background-color: #63b3ed;
  }
  
  .column-gateways .gateway-general .connector-line-gray {
    position: absolute;
    left: 100%;
    top: 40px;
    width: 110px;
    height: 1.5px;
    background-color: #cbd5e0;
  }
}

.entity-sub-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* No Access Blocking Element */
.no-access-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: absolute;
  top: 38%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
  width: 100%;
}

.no-access-indicator {
  background-color: #ffffff;
  border: 1px solid #fed7d7;
  border-radius: 20px;
  padding: 4px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 8px rgba(229, 62, 62, 0.15);
  margin-bottom: 8px;
}

.no-access-text {
  color: #e53e3e;
  font-size: 11px;
  font-weight: 700;
}

.no-access-icon {
  width: 16px;
  height: 16px;
  color: #e53e3e;
  display: flex;
  align-items: center;
  justify-content: center;
}

.no-access-vertical-line {
  width: 1.5px;
  height: 70px;
  background-image: linear-gradient(to bottom, #cbd5e0 30%, rgba(255,255,255,0) 0%);
  background-position: right;
  background-size: 1.5px 8px;
  background-repeat: repeat-y;
}

@media (max-width: 991px) {
  .no-access-block {
    position: relative;
    top: auto;
    left: auto;
    transform: none;
    margin: 20px 0;
  }
  .no-access-vertical-line {
    height: 40px;
  }
}

/* Expected Effects Banner Section */
.biz5g-effect-banner {
  position: relative;
  background: linear-gradient(135deg, #020b18 0%, #0d1e3a 100%);
  border-radius: 8px;
  padding: 80px 40px;
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  box-shadow: 0 15px 35px rgba(2, 11, 24, 0.25);
  overflow: hidden;
}

@media (max-width: 991px) {
  .biz5g-effect-banner {
    grid-template-columns: repeat(2, 1fr);
    padding: 50px 30px;
    gap: 40px 30px;
  }
}

@media (max-width: 576px) {
  .biz5g-effect-banner {
    grid-template-columns: 1fr;
  }
}

.biz5g-effect-mesh {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1.1px, transparent 1.1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.biz5g-effect-col {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.biz5g-effect-col-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  word-break: keep-all;
}

.biz5g-effect-separator {
  width: 24px;
  height: 1.5px;
  background-color: #63b3ed;
  margin: 16px auto;
}

.biz5g-effect-col-desc {
  font-size: 14px;
  color: #a0aec0;
  line-height: 1.6;
  word-break: keep-all;
}

/* Pricing Section */
.biz5g-pricing-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 16px;
  border-bottom: 2px solid #2d3748;
  padding-bottom: 12px;
}

.biz5g-pricing-title {
  font-size: 18px;
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 0;
}

.biz5g-vat-note {
  font-size: 13px;
  color: #718096;
}

.biz5g-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin-bottom: 30px;
  border-bottom: 1px solid #cbd5e0;
}

.biz5g-table th {
  background-color: #f7fafc;
  color: #4a5568;
  font-weight: 700;
  padding: 16px 20px;
  border-top: 1.5px solid #cbd5e0;
  border-bottom: 1px solid #cbd5e0;
  text-align: center;
}

.biz5g-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #e2e8f0;
  color: #4a5568;
  text-align: center;
}

.biz5g-table tr:hover td {
  background-color: #f8fafc;
}

.biz5g-table td.bold-text {
  font-weight: 600;
  color: #2d3748;
}

.biz5g-table td.price-text {
  font-weight: 700;
  color: #002FA7;
}

/* Sub-lines pricing table styles */
.biz5g-table td.note-cell {
  text-align: left;
  line-height: 1.6;
}

.biz5g-table td.category-cell {
  background-color: #fafbfc;
  vertical-align: middle;
  font-weight: 700;
  color: #1a202c;
  border-right: 1px solid #e2e8f0;
}

.price-net {
  font-size: 13px;
  color: #718096;
  margin-top: 2px;
}

.price-val {
  font-weight: 700;
  color: #2d3748;
}

.biz5g-table.sub-lines-table td {
  border-right: 1px solid #e2e8f0;
}

.biz5g-table.sub-lines-table td:last-child {
  border-right: none;
}

.biz5g-table.sub-lines-table th {
  border-right: 1px solid #cbd5e0;
}

.biz5g-table.sub-lines-table th:last-child {
  border-right: none;
}

/* ==========================================================================
   Enterprise IoT (사물인터넷) Page Styles
   ========================================================================== */

/* Hero Banner */
.hero-enterprise-iot {
  background-image: linear-gradient(to right, rgba(1, 6, 21, 0.95) 0%, rgba(1, 6, 21, 0.75) 45%, rgba(0, 47, 167, 0.4) 100%), url('/images/hero_bg.png');
}

/* Service Intro Badge */
.iot-intro-badge {
  display: inline-block;
  border: 1px solid #718096;
  border-radius: 6px;
  padding: 6px 18px;
  font-size: 14px;
  font-weight: 700;
  color: #4a5568;
  text-align: center;
  margin: 0 auto;
}

.iot-intro-title {
  font-size: 32px;
  font-weight: 800;
  margin-top: 20px;
  text-align: center;
  color: #1a202c;
}

.iot-intro-title .highlight-blue {
  color: #002FA7;
}

/* Section Title */
.iot-section-title {
  font-size: 28px;
  font-weight: 800;
  text-align: center;
  color: #1a202c;
  line-height: 1.4;
  word-break: keep-all;
}

/* Case Targets (꼭 필요합니다) */
.iot-target-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1100px;
  margin: 0 auto;
}

@media (max-width: 991px) {
  .iot-target-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
  }
}

.iot-target-card {
  background-color: #ffffff;
  border-radius: 16px;
  padding: 50px 30px 40px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.iot-target-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 47, 167, 0.06);
}

.avatar-container {
  width: 96px;
  height: 96px;
  margin: 0 auto 24px;
}

.avatar-svg {
  width: 100%;
  height: 100%;
}

.iot-target-desc {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.7;
  font-weight: 500;
}

/* Diagram (서비스 구성) */
.iot-diagram-outer {
  background-color: #121625;
  border-radius: 12px;
  padding: 60px 40px;
  position: relative;
  overflow: hidden;
  max-width: 1000px;
  margin: 0 auto;
}

.iot-diagram-mesh {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1.1px, transparent 1.1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.iot-diagram-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 2;
}

@media (max-width: 991px) {
  .iot-diagram-flex {
    flex-direction: column;
    gap: 40px;
  }
}

.iot-diagram-node-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 110px;
}

.iot-diagram-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.node-circle {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background-color: #1a2035;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  color: #cbd5e0;
}

.node-circle svg {
  width: 32px;
  height: 32px;
}

.node-circle.border-blue {
  border: 2px solid #3182ce;
  background-color: rgba(49, 130, 206, 0.15);
  color: #63b3ed;
}

.node-circle.border-gray {
  border: 2px solid #4a5568;
  background-color: rgba(74, 85, 104, 0.15);
  color: #cbd5e0;
}

.node-label {
  font-size: 13px;
  font-weight: 700;
  color: #e2e8f0;
  line-height: 1.4;
  word-break: keep-all;
}

/* Connecting Lines */
.iot-connector-dotted {
  flex-grow: 1;
  height: 1px;
  border-top: 2px dotted #4a5568;
  margin: 0 10px;
}

.iot-connector-dotted-short {
  width: 40px;
  height: 1px;
  border-top: 2px dotted #3182ce;
  margin: 0 5px;
}

@media (max-width: 991px) {
  .iot-connector-dotted,
  .iot-connector-dotted-short,
  .iot-sub-connector-fork {
    display: none !important;
  }
}

/* Wireless Box Container */
.iot-wireless-box {
  border: 1px dashed rgba(99, 179, 237, 0.4);
  background-color: rgba(26, 32, 53, 0.5);
  border-radius: 12px;
  padding: 24px 30px;
  position: relative;
}

.iot-wireless-box-title {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #ffffff;
  color: #1a202c;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.iot-wireless-grid {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 10px;
}

.iot-wireless-subcol {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* Fork Line Connector */
.iot-sub-connector-fork {
  display: flex;
  position: relative;
  width: 30px;
  height: 120px;
}

.fork-line-top {
  position: absolute;
  top: 20px;
  right: 0;
  left: 0;
  height: 1.5px;
  background-color: #3182ce;
  transform: rotate(-35deg);
  transform-origin: right top;
}

.fork-line-bottom {
  position: absolute;
  bottom: 20px;
  right: 0;
  left: 0;
  height: 1.5px;
  background-color: #3182ce;
  transform: rotate(35deg);
  transform-origin: right bottom;
}

.fork-line-main {
  position: absolute;
  top: 50%;
  right: 0;
  width: 15px;
  height: 1.5px;
  background-color: #3182ce;
  transform: translateY(-50%);
}

/* Signal Tower Animation Wave */
@keyframes signalPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(99, 179, 237, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(99, 179, 237, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(99, 179, 237, 0);
  }
}

.node-circle.signal-wave {
  animation: signalPulse 2s infinite;
}

/* Alternating Features Rows (왜 사용해야 할까요) */
.iot-features-wrapper {
  display: flex;
  flex-direction: column;
  gap: 60px;
  max-width: 1100px;
  margin: 0 auto;
}

.iot-feature-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: center;
}

.iot-feature-row.reversed {
  grid-template-columns: 1.2fr 1fr;
}

@media (max-width: 768px) {
  .iot-feature-row,
  .iot-feature-row.reversed {
    grid-template-columns: 1fr;
    gap: 30px;
    text-align: center;
  }
}

.iot-feature-img-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.feature-ill-svg {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
}

.feature-ill-img {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: 12px;
  object-fit: contain;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
}

.iot-feature-text-wrap {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.iot-feature-num {
  font-size: 16px;
  font-weight: 700;
  color: #3182ce;
  margin-bottom: 8px;
}

.iot-feature-title {
  font-size: 24px;
  font-weight: 800;
  color: #1a202c;
  margin-bottom: 16px;
}

.iot-feature-desc {
  font-size: 15px;
  color: #4a5568;
  line-height: 1.8;
  word-break: keep-all;
}

/* Why KT (선택해야 할까요) */
.iot-why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1100px;
  margin: 0 auto;
}

@media (max-width: 991px) {
  .iot-why-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
  }
}

.iot-why-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 45px 30px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0,0,0,0.01);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.iot-why-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 47, 167, 0.05);
}

.why-icon-box {
  width: 72px;
  height: 72px;
  background-color: #f7fafc;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: #2b6cb0;
}

.why-icon-svg {
  width: 40px;
  height: 40px;
}

.iot-why-card-title {
  font-size: 20px;
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 12px;
}

.iot-why-card-desc {
  font-size: 14px;
  color: #718096;
  line-height: 1.6;
}

/* Pricing Tabs for IoT */
.pricing-tabs-container {
  border-bottom: 2px solid #e2e8f0;
  margin-bottom: 15px;
  display: flex;
  justify-content: center;
}

.pricing-tabs-menu {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 40px;
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
}

.pricing-tabs-menu::-webkit-scrollbar {
  display: none; /* Safari and Chrome */
}

.pricing-tab {
  padding: 16px 20px;
  font-size: 18px;
  font-weight: 600;
  color: #718096;
  cursor: pointer;
  position: relative;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.pricing-tab:hover {
  color: #002FA7;
}

.pricing-tab.active {
  color: #002FA7;
  font-weight: 700;
}

.pricing-tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: #002FA7;
  border-radius: 2px 2px 0 0;
}

.pricing-vat-note {
  text-align: right;
  font-size: 13px;
  color: #718096;
  margin-bottom: 12px;
  font-weight: 500;
}

.pricing-info-notes {
  margin-top: 25px;
  background-color: #f8fafc;
  border-radius: 6px;
  padding: 20px 24px;
  border: 1px solid #e2e8f0;
  text-align: left;
}

.pricing-info-notes p {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.8;
  margin-bottom: 6px;
}

.pricing-info-notes p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Enterprise Centrex (기업인터넷전화) Page Styles
   ========================================================================== */

/* Hero Banner */
.hero-biz-centrex {
  background-image: linear-gradient(to right, rgba(1, 6, 21, 0.9) 0%, rgba(1, 6, 21, 0.7) 45%, rgba(0, 47, 167, 0.3) 100%), url('/images/centrex_hero_bg.png');
}

/* Animations */
@keyframes bounce-slow {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

@keyframes float-slow {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-8px) scale(1.05);
  }
}

.centrex-float-circle {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  user-select: none;
  cursor: pointer;
}

.centrex-float-circle:hover {
  transform: scale(1.08) translateY(-3px);
}

.centrex-float-circle.green:hover {
  box-shadow: 0 15px 30px rgba(49, 151, 149, 0.4);
}

.centrex-float-circle.blue:hover {
  box-shadow: 0 15px 30px rgba(49, 130, 206, 0.4);
}

@media (max-width: 991px) {
  .centrex-visual-container {
    height: auto !important;
    flex-direction: column !important;
    gap: 40px !important;
    margin: 40px auto !important;
  }
  .centrex-visual-container svg {
    display: none !important;
  }
  .centrex-platform-base {
    position: relative !important;
    bottom: auto !important;
    transform: none !important;
    width: 260px !important;
    height: 60px !important;
    order: 2;
  }
  .centrex-phone-object {
    position: relative !important;
    bottom: auto !important;
    order: 1;
  }
  .centrex-visual-container div[style*="position: absolute"] {
    position: relative !important;
    top: auto !important;
    left: auto !important;
    right: auto !important;
    bottom: auto !important;
    margin: 0 !important;
  }
  .centrex-visual-container div[style*="left: 30px"],
  .centrex-visual-container div[style*="right: 30px"] {
    position: relative !important;
    left: auto !important;
    right: auto !important;
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    justify-content: center !important;
    gap: 15px !important;
    height: auto !important;
  }
  .centrex-float-circle {
    width: 90px !important;
    height: 90px !important;
    font-size: 12px !important;
  }
}