/* ============================================================
   FO&T Website Stylesheet
   Fiber & Optic & Telecommunication INC.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700;900&display=swap');

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:    #0A1628;
  --blue:       #1352A8;
  --blue-light: #1E6FD9;
  --cyan:       #00C4E8;
  --text:       #1A202C;
  --text-muted: #64748B;
  --bg:         #F5F7FA;
  --white:      #FFFFFF;
  --border:     #E2E8F0;
  --nav-h:      72px;
  --shadow-sm:  0 2px 8px rgba(0,0,0,.08);
  --shadow-md:  0 8px 32px rgba(0,0,0,.12);
  --shadow-lg:  0 16px 48px rgba(0,0,0,.16);
  --radius:     8px;
  --radius-lg:  16px;
  --transition: .25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans KR', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }

/* ---- Utility ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container--wide { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.text-blue { color: var(--blue); }
.text-cyan { color: var(--cyan); }

.section { padding: 96px 0; }
.section--gray { background: var(--bg); }
.section--dark { background: var(--primary); color: var(--white); }
.section--blue { background: var(--blue); color: var(--white); }

.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 56px;
}
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn--primary { background: var(--blue); color: var(--white); }
.btn--primary:hover { background: var(--blue-light); }
.btn--outline { background: transparent; border-color: var(--white); color: var(--white); }
.btn--outline:hover { background: var(--white); color: var(--blue); }
.btn--outline-blue { background: transparent; border-color: var(--blue); color: var(--blue); }
.btn--outline-blue:hover { background: var(--blue); color: var(--white); }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(10, 22, 40, .97);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background var(--transition);
}
.nav.scrolled { background: rgba(10, 22, 40, 1); box-shadow: var(--shadow-md); }

.nav__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 48px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav__logo-img {
  height: 40px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.nav__item { position: relative; }

.nav__link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,.8);
  border-radius: 4px;
  transition: var(--transition);
  white-space: nowrap;
}
.nav__link:hover { color: var(--white); background: rgba(255,255,255,.08); }
.nav__link.active { color: var(--white); background: var(--blue); }
.nav__link svg { transition: transform .2s; }
.nav__item:hover .nav__link svg { transform: rotate(180deg); }

/* Dropdown */
.nav__dropdown {
  position: absolute;
  top: 100%;             /* gap 없음 — 마우스 이동 중 hover 끊김 방지 */
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 220px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  padding-top: 16px;     /* 시각적 여백은 패딩으로 */
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
}
.nav__item:hover .nav__dropdown,
.nav__item.dropdown-open .nav__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* Mega dropdown for products */
.nav__dropdown--mega {
  min-width: 220px;
  padding: 8px;
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav__dropdown-col-title {
  grid-column: 1 / -1;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 4px 8px 8px;
}
.nav__dropdown-col-title + .nav__dropdown-col-title { margin-top: 8px; }
.nav__dropdown-divider {
  grid-column: 1 / -1;
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}

.nav__dropdown-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
}
.nav__dropdown-link:hover { background: var(--bg); color: var(--blue); }
.nav__dropdown-link.active { background: #EBF2FF; color: var(--blue); font-weight: 600; border: 1px solid rgba(19,82,168,.25); }
.nav__dropdown-link-icon {
  width: 32px; height: 32px;
  background: var(--bg);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.nav__dropdown-link:hover .nav__dropdown-link-icon { background: #EBF2FF; }
.nav__dropdown-link-info { display: flex; flex-direction: column; line-height: 1.3; }
.nav__dropdown-link-name { font-weight: 600; font-size: 13px; }
.nav__dropdown-link-desc { font-size: 11px; color: var(--text-muted); }

.nav__simple-link {
  display: block;
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
}
.nav__simple-link:hover { background: var(--bg); color: var(--blue); }

.nav__contact {
  margin-left: auto;
  flex-shrink: 0;
  padding: 10px 22px;
  font-size: 13px;
}

/* Language toggle */
.nav__lang-wrap {
  position: relative;
  flex-shrink: 0;
}
.nav__lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px;
  color: rgba(255,255,255,.85);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: .04em;
  transition: background .15s, border-color .15s, color .15s;
}
.nav__lang-btn:hover {
  background: rgba(255,255,255,.18);
  border-color: rgba(255,255,255,.4);
  color: #fff;
}
.nav__lang-btn > svg { flex-shrink: 0; opacity: .8; }
.nav__lang-chevron {
  opacity: .7;
  transition: transform .2s;
  flex-shrink: 0;
}
.nav__lang-wrap.is-open .nav__lang-chevron { transform: rotate(180deg); }
.nav__lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 110px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  list-style: none;
  padding: 4px 0;
  z-index: 2000;
}
.nav__lang-dropdown.is-open { display: block; }
.nav__lang-dropdown li button {
  display: block;
  width: 100%;
  padding: 8px 16px;
  background: none;
  border: none;
  text-align: left;
  font-size: 13px;
  color: var(--primary);
  cursor: pointer;
  transition: background .12s;
}
.nav__lang-dropdown li button:hover { background: var(--bg); }
.nav__lang-dropdown li button.active {
  color: var(--blue);
  font-weight: 700;
}

/* Google Translate 상단 툴바 숨김 */
.goog-te-banner-frame,
.skiptranslate { display: none !important; }
body { top: 0 !important; }

/* 영문 모드 — 한국어 전용 보조 텍스트 숨김 */
body.lang-translated .co-en-sub { display: none; }

/* Mobile hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav__toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile nav drawer */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0; bottom: 0;
  background: var(--primary);
  overflow-y: auto;
  padding: 24px;
  z-index: 999;
}
.nav__mobile.open { display: block; }
.nav__mobile-item { border-bottom: 1px solid rgba(255,255,255,.08); }
.nav__mobile-link {
  display: block;
  padding: 16px 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
}
.nav__mobile-sub { padding: 0 8px 12px; }
.nav__mobile-sub a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: rgba(255,255,255,.7);
  border-radius: 4px;
}
.nav__mobile-sub a:hover { color: var(--white); }

/* ============================================================
   HERO (Homepage)
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--primary);
  overflow: hidden;
  padding-top: var(--nav-h);
}

/* Hero video background */
.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  opacity: 0;
  transition: opacity 1s ease;
}
.hero__video.loaded {
  opacity: 1;
}
.hero__video-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(135deg, rgba(10,22,40,.75) 0%, rgba(13,32,68,.60) 100%),
    radial-gradient(ellipse 80% 60% at 70% 50%, rgba(0,196,232,.10) 0%, transparent 60%);
}

.hero__grid { display: none; }

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  width: 100%;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 196, 232, .12);
  border: 1px solid rgba(0, 196, 232, .3);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero__tag-dot { width: 6px; height: 6px; background: var(--cyan); border-radius: 50%; }

.hero__title {
  font-size: clamp(24px, 4.2vw, 64px);
  font-weight: 900;
  line-height: 1.25;
  color: var(--white);
  margin-bottom: 24px;
  letter-spacing: -.02em;
}
.hero__title em { color: var(--cyan); font-style: normal; }

.hero__desc {
  font-size: 17px;
  color: rgba(255,255,255,.65);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 480px;
}

.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }



.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero__visual-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 460px;
}
.hero__visual-screen {
  background: linear-gradient(135deg, #1a3a5c, #0d2240);
  border-radius: 8px;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.hero__visual-screen::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,196,232,.15), rgba(19,82,168,.1));
}
.hero__visual-label {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.hero__visual-badge {
  background: rgba(0, 196, 232, .15);
  border: 1px solid rgba(0, 196, 232, .3);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 11px;
  color: var(--cyan);
  font-weight: 600;
}

/* ============================================================
   PAGE HEADER (inner pages)
   ============================================================ */
.page-header {
  padding: calc(var(--nav-h) + 60px) 0 60px;
  background: var(--primary);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,.82) 0%, rgba(19,82,168,.55) 100%);
}
.page-header .container { position: relative; }
.page-header__breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.5);
  margin-bottom: 16px;
}
.page-header__breadcrumb a { color: rgba(255,255,255,.5); }
.page-header__breadcrumb a:hover { color: var(--cyan); }
.page-header__breadcrumb span { color: rgba(255,255,255,.25); }
.page-header__title { font-size: clamp(32px, 5vw, 52px); font-weight: 900; margin-bottom: 12px; }
.page-header__sub { font-size: 16px; color: rgba(255,255,255,.6); max-width: 600px; }

/* ============================================================
   CARDS & GRID
   ============================================================ */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.card__img {
  aspect-ratio: 16/9;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  overflow: hidden;
}
.card__img img { width: 100%; height: 100%; object-fit: cover; }

.card__body { padding: 24px; }
.card__tag {
  display: inline-block;
  background: #EBF2FF;
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.card__title { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.card__desc { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 16px; }
.card__link {
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}
.card:hover .card__link { gap: 10px; }

/* Product grid */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.product-grid--2 { grid-template-columns: repeat(2, 1fr); }
.product-grid--3 { grid-template-columns: repeat(3, 1fr); }
.product-grid--4 { grid-template-columns: repeat(4, 1fr); gap: 20px; }
/* 4열 카드 — 이미지 높이·폰트 축소 */
.product-grid--4 .card__img { height: 160px; font-size: 48px !important; }
.product-grid--4 .card__title { font-size: 15px; }
.product-grid--4 .card__desc  { font-size: 13px; -webkit-line-clamp: 3; }

/* ============================================================
   FEATURES LIST
   ============================================================ */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }

.feature {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.feature__icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
  color: #fff;
}
.feature__title { font-size: 17px; font-weight: 700; }
.feature__desc { font-size: 14px; color: var(--text-muted); line-height: 1.7; }


/* ============================================================
   PRODUCT DETAIL
   ============================================================ */
.product-hero {
  padding: calc(var(--nav-h) + 40px) 0 48px;
  background: var(--primary);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--white);
  overflow: hidden;
  position: relative;
}
.product-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,.85) 0%, rgba(19,82,168,.50) 100%);
  pointer-events: none;
}
.product-hero__inner { position: relative; z-index: 1; }
.product-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: end;
  padding-bottom: 0;
}
.product-hero__category {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.product-hero__name {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  margin-bottom: 16px;
  line-height: 1.1;
}
.product-hero__tagline {
  font-size: 16px;
  color: rgba(255,255,255,.7);
  margin-bottom: 32px;
  line-height: 1.7;
}
.product-hero__visual {
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.product-hero__img-wrap {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius-lg);          /* 4개 모서리 모두 라운딩 */
  padding: 32px;
  width: 100%;
  max-width: 440px;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  overflow: hidden;                          /* 이미지 삽입 시 라운딩 유지 */
  backdrop-filter: blur(4px);               /* 배경 영상 위 유리 효과 */
}
/* 이미지 삽입 시 꽉 채우기 */
.product-hero__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 0;
}

/* Specs table */
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table th,
.specs-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.specs-table th {
  background: var(--bg);
  font-weight: 600;
  color: var(--text-muted);
  width: 200px;
}
.specs-table tr:last-child th,
.specs-table tr:last-child td { border-bottom: none; }

/* ============================================================
   CONTACT BAND
   ============================================================ */
.contact-band {
  background: var(--primary);
  color: var(--white);
  padding: 80px 0;
  text-align: center;
}
.contact-band__title { font-size: clamp(24px, 4vw, 36px); font-weight: 800; margin-bottom: 12px; }
.contact-band__sub { font-size: 16px; color: rgba(255,255,255,.6); margin-bottom: 40px; }
.contact-band__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: #060E1A;
  color: rgba(255,255,255,.6);
  padding: 64px 0 32px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer__logo-name { font-size: 22px; font-weight: 900; color: var(--white); margin-bottom: 4px; }
.footer__logo-sub { font-size: 11px; letter-spacing: .1em; color: rgba(255,255,255,.35); text-transform: uppercase; margin-bottom: 16px; }
.footer__desc { font-size: 13px; line-height: 1.8; max-width: 280px; }
.footer__heading { font-size: 13px; font-weight: 700; color: var(--white); letter-spacing: .08em; text-transform: uppercase; margin-bottom: 20px; }
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__links a { font-size: 13px; transition: color var(--transition); }
.footer__links a:hover { color: var(--white); }
.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  margin-bottom: 10px;
}
.footer__contact-icon { font-size: 15px; margin-top: 2px; opacity: .7; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  flex-wrap: wrap;
  gap: 12px;
}
.footer__bottom a:hover { color: var(--white); }

/* ============================================================
   TABS (for product sections)
   ============================================================ */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--border); margin-bottom: 48px; }
.tab-btn {
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.tab-btn.active { color: var(--blue); border-bottom-color: var(--blue); }
.tab-btn:hover { color: var(--text); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============================================================
   HIGHLIGHT BOX
   ============================================================ */
.highlight-box {
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  border-radius: var(--radius-lg);
  padding: 48px;
  color: var(--white);
  display: flex;
  gap: 48px;
  align-items: center;
}
.highlight-box__num { font-size: 72px; font-weight: 900; line-height: 1; color: var(--cyan); }
.highlight-box__title { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.highlight-box__desc { font-size: 15px; color: rgba(255,255,255,.75); }

/* ============================================================
   ESG / PATENT SECTIONS
   ============================================================ */
.esg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.esg-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
}
.esg-card:hover { box-shadow: var(--shadow-md); border-color: var(--blue); }
.esg-card__icon { font-size: 48px; margin-bottom: 20px; }
.esg-card__title { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.esg-card__desc { font-size: 14px; color: var(--text-muted); line-height: 1.8; }

.patent-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.patent-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: var(--transition);
}
.patent-item:hover { border-color: var(--blue); box-shadow: var(--shadow-sm); }
.patent-item__badge {
  width: 48px; height: 48px;
  background: #EBF2FF;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.patent-item__title { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.patent-item__meta { font-size: 12px; color: var(--text-muted); }

/* ============================================================
   COMPANY PAGE
   ============================================================ */
.history-timeline { position: relative; padding-left: 32px; }
.history-timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
}
.history-item {
  position: relative;
  margin-bottom: 40px;
}
.history-item::before {
  content: '';
  position: absolute;
  left: -38px; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--blue);
  border: 2px solid var(--white);
  box-shadow: 0 0 0 2px var(--blue);
}
.history-item__year { font-size: 13px; font-weight: 700; color: var(--blue); margin-bottom: 8px; }
.history-item__events { display: flex; flex-direction: column; gap: 6px; }
.history-item__event { font-size: 14px; color: var(--text-muted); }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: none;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .product-hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .product-hero__visual { display: none; }
  .product-grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav__menu, .nav__contact { display: none; }
  .nav__toggle { display: flex; }
  .nav__lang-wrap { margin-left: auto; }

  .hero__content { grid-template-columns: 1fr; gap: 48px; }
  .hero__visual { display: none; }

  .product-grid, .product-grid--2, .product-grid--3, .product-grid--4 { grid-template-columns: 1fr; }
  .product-grid--4 .card__img { height: 140px; }
  .esg-grid { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .highlight-box { flex-direction: column; gap: 24px; text-align: center; padding: 32px; }
}

/* ============================================================
   FONT AWESOME — 진한 배경에서 아이콘 흰색
   ============================================================ */

/* 파란 그라데이션 박스 (.feature__icon) */
.feature__icon i { color: #fff; }

/* 다크 네이비 섹션들 */
.hero i,
.product-hero i,
.page-header i,
.contact-band i { color: #fff; }

/* 푸터 — 연락처 아이콘만 시안 유지, 나머지 흰색 */
.footer i { color: rgba(255,255,255,.75); }
.footer__contact-icon i { color: var(--cyan); }

/* ESG 기둥 비주얼 (다크 배경 위) */
.esg-pillar__visual i { color: #fff; }

/* ESG 카드 아이콘 (흰 카드 위 — 시안 유지) */
.esg-card__icon i { color: var(--cyan); }

/* 네비게이션 드롭다운 (밝은 배경 — 파란색 유지) */
.nav__dropdown-link-icon i { color: var(--blue); }
.nav__dropdown-link:hover .nav__dropdown-link-icon i { color: var(--blue); }

/* 특허·인증 뱃지/카드 아이콘 (밝은 배경) */
.patent-item i,
.cert-card i { color: var(--blue); }

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; }
  .btn { justify-content: center; }
  .tabs { overflow-x: auto; }
}

/* ============================================================
   LED 제품 인트로 섹션 (.prod-intro)
   ============================================================ */
.prod-intro {
  background: var(--primary);
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.prod-intro__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 64px;
  align-items: center;
}
.prod-intro__name {
  font-size: clamp(32px, 4.5vw, 56px);
  font-weight: 900;
  color: #fff;
  line-height: 1;
  letter-spacing: -.03em;
  white-space: nowrap;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.prod-intro__name-sub {
  font-size: clamp(11px, 1.2vw, 14px);
  font-weight: 500;
  color: rgba(255,255,255,.45);
  letter-spacing: .02em;
  white-space: nowrap;
}
.prod-intro__right {
  border-left: 1px solid rgba(255,255,255,.14);
  padding-left: 48px;
}
.prod-intro__cat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 20px;
}
.prod-intro__sub {
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,.5);
  margin-bottom: 14px;
}
.prod-intro__tagline {
  font-size: clamp(15px, 1.8vw, 20px);
  font-weight: 800;
  color: #fff;
  line-height: 1.35;
  white-space: nowrap;
  margin-bottom: 10px;
}
.prod-intro__desc {
  font-size: 13px;
  color: rgba(255,255,255,.45);
  line-height: 1.8;
  letter-spacing: .01em;
}
@media (max-width: 768px) {
  .prod-intro { padding: 12px 0; }
  .prod-intro__inner { grid-template-columns: 1fr; gap: 24px; }
  .prod-intro__right {
    border-left: none;
    border-top: 1px solid rgba(255,255,255,.14);
    padding-left: 0;
    padding-top: 24px;
  }
}

/* ============================================================
   Product Sticky Sub-nav
   히어로가 화면 위로 사라지면 nav 아래에 배지/버튼 고정
   ============================================================ */
.product-sticky-bar {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  z-index: 990;
  background: rgba(18, 40, 68, .97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,.13);
  padding: 10px 0;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform .22s ease, opacity .22s ease;
}
.product-sticky-bar.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.product-sticky-bar .container {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.product-sticky-bar__category {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px 5px 14px;
  background: var(--blue-light);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
}
.product-sticky-bar__category svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  opacity: .75;
}
.product-sticky-bar__divider {
  width: 1px;
  height: 16px;
  background: rgba(255,255,255,.2);
  flex-shrink: 0;
  align-self: center;
}
.product-sticky-bar__badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1;
}
.product-sticky-bar__badges .hero-badge-row,
.product-sticky-bar__badges .sj-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0;
}
.product-sticky-bar__actions {
  flex-shrink: 0;
  margin-left: auto;
}
.product-sticky-bar__actions .hero-btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0;
}
.product-sticky-bar .btn {
  padding: 8px 18px;
  font-size: 13px;
  min-height: 0;
  height: auto;
}

@media (max-width: 768px) {
  .product-sticky-bar .container { gap: 8px; }
  .product-sticky-bar .btn { padding: 7px 14px; font-size: 12px; }
  .product-sticky-bar__category { font-size: 11px; padding: 4px 10px 4px 12px; }
  .product-sticky-bar__badges .hero-badge,
  .product-sticky-bar__badges .sj-badge { padding: 5px 10px; font-size: 11px; }
}