/* ===========================
   RESET & BASE
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Noto Sans KR', 'Roboto', sans-serif;
  color: #222;
  background: #fff;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color .3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===========================
   HEADER
=========================== */
#header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(10,15,25,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s;
}
#header.scrolled { background: rgba(10,15,25,.98); }
.header-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 80px;
}
.logo a { display: flex; flex-direction: column; line-height: 1; gap: 2px; }
.logo-text { font-family: 'Roboto', sans-serif; font-size: 1.7rem; font-weight: 900; color: #fff; letter-spacing: 2px; }
.logo-accent { color: #e8a020; }
.logo-sub { font-size: .65rem; color: #aaa; letter-spacing: 3px; font-weight: 400; }

.nav-desktop ul { display: flex; gap: 36px; }
.nav-desktop ul li a {
  color: #ccc; font-size: .93rem; font-weight: 500; letter-spacing: .5px;
  padding: 6px 0; border-bottom: 2px solid transparent;
  transition: color .3s, border-color .3s;
}
.nav-desktop ul li a:hover { color: #e8a020; border-color: #e8a020; }

.hamburger {
  display: none; flex-direction: column; gap: 5px; padding: 4px;
}
.hamburger span {
  display: block; width: 26px; height: 2px; background: #fff; border-radius: 2px;
  transition: all .3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none; background: rgba(10,15,25,.98); border-top: 1px solid rgba(255,255,255,.1);
}
.nav-mobile.open { display: block; }
.nav-mobile ul { padding: 16px 24px 24px; }
.nav-mobile ul li { border-bottom: 1px solid rgba(255,255,255,.07); }
.nav-mobile ul li a { display: block; padding: 14px 0; color: #ccc; font-size: 1rem; }
.nav-mobile ul li a:hover { color: #e8a020; }

/* ===========================
   BUTTONS
=========================== */
.btn-primary {
  display: inline-block; background: #e8a020; color: #fff;
  padding: 14px 32px; border-radius: 4px; font-weight: 700;
  font-size: .95rem; letter-spacing: .5px;
  transition: background .3s, transform .2s;
}
.btn-primary:hover { background: #cf8d15; transform: translateY(-2px); }
.btn-primary.full-width { width: 100%; text-align: center; }
.btn-outline {
  display: inline-block; border: 2px solid rgba(255,255,255,.7); color: #fff;
  padding: 12px 30px; border-radius: 4px; font-weight: 600;
  font-size: .95rem; transition: all .3s;
}
.btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; }

/* ===========================
   HERO SLIDER
=========================== */
#hero { position: relative; height: 100vh; min-height: 620px; overflow: hidden; }
.slider { position: relative; width: 100%; height: 100%; }
.slide {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0; transition: opacity .9s ease;
}
.slide.active { opacity: 1; }
.slide-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(5,10,20,.8) 0%, rgba(5,10,20,.4) 100%);
}
.slide-content {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  max-width: 760px; width: 90%; text-align: center; color: #fff;
}
.slide-tag {
  font-size: .85rem; letter-spacing: 3px; text-transform: uppercase;
  color: #e8a020; font-weight: 600; margin-bottom: 18px;
  animation: fadeUp .8s ease both;
}
.slide-content h1 {
  font-size: clamp(2rem, 5vw, 3.6rem); font-weight: 300; line-height: 1.25;
  margin-bottom: 20px; animation: fadeUp .8s .1s ease both;
}
.slide-content h1 strong { font-weight: 900; color: #fff; }
.slide-desc {
  font-size: clamp(.9rem, 2vw, 1.1rem); color: rgba(255,255,255,.8);
  line-height: 1.8; margin-bottom: 36px;
  animation: fadeUp .8s .2s ease both;
}
.slide-content .btn-primary,
.slide-content .btn-outline {
  animation: fadeUp .8s .3s ease both; margin: 0 8px;
}

.slider-controls {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 16px; z-index: 10;
}
.slider-btn {
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,255,255,.15); color: #fff; font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,.3);
  transition: background .3s;
}
.slider-btn:hover { background: rgba(232,160,32,.7); }
.slider-dots { display: flex; gap: 8px; }
.dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.4); cursor: pointer;
  transition: background .3s, transform .3s;
}
.dot.active { background: #e8a020; transform: scale(1.3); }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===========================
   STATS
=========================== */
#stats { background: #0a0f1a; padding: 50px 0; }
.stats-inner {
  max-width: 1000px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.stat-item { text-align: center; padding: 16px; }
.stat-num {
  font-size: 2.8rem; font-weight: 900; color: #e8a020;
  font-family: 'Roboto', sans-serif;
}
.stat-plus { font-size: 1.8rem; font-weight: 700; color: #e8a020; }
.stat-label { display: block; color: #aaa; font-size: .9rem; margin-top: 6px; }

/* ===========================
   SECTION COMMONS
=========================== */
section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  font-size: .78rem; letter-spacing: 4px; text-transform: uppercase;
  color: #e8a020; font-weight: 700; margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.7rem, 3vw, 2.6rem); font-weight: 700;
  line-height: 1.3; color: #111; margin-bottom: 16px;
}
.section-desc { color: #666; font-size: 1rem; line-height: 1.7; }

/* ===========================
   ABOUT
=========================== */
#about { background: #f8f9fb; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-img { position: relative; border-radius: 8px; overflow: visible; }
.about-img img { border-radius: 8px; width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.about-badge {
  position: absolute; bottom: -20px; right: -20px;
  background: #e8a020; color: #fff; border-radius: 8px;
  padding: 20px 28px; text-align: center; line-height: 1;
  box-shadow: 0 8px 24px rgba(232,160,32,.35);
}
.about-badge strong { display: block; font-size: .8rem; letter-spacing: 2px; margin-bottom: 6px; }
.about-badge span { font-size: 2.2rem; font-weight: 900; font-family: 'Roboto', sans-serif; }

.about-text { padding-left: 8px; }
.about-text .section-tag { text-align: left; display: block; }
.about-text .section-title { text-align: left; }
.about-desc { color: #555; line-height: 1.85; margin-bottom: 16px; font-size: .97rem; }
.about-features { margin: 24px 0 32px; display: flex; flex-direction: column; gap: 12px; }
.about-features li { display: flex; align-items: center; gap: 10px; color: #444; font-size: .95rem; }
.about-features li i { color: #e8a020; font-size: 1.05rem; }

/* ===========================
   PRODUCTS
=========================== */
#products { background: #fff; }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
  border-radius: 10px; overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,.07);
  transition: transform .3s, box-shadow .3s;
  background: #fff; position: relative;
}
.product-card:hover { transform: translateY(-8px); box-shadow: 0 12px 36px rgba(0,0,0,.14); }
.product-card img { width: 100%; height: 200px; object-fit: cover; }
.product-icon {
  position: absolute; top: 168px; right: 20px;
  width: 50px; height: 50px; border-radius: 50%;
  background: #e8a020; color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; box-shadow: 0 4px 14px rgba(232,160,32,.4);
  z-index: 2;
}
.product-info { padding: 28px 24px 24px; }
.product-info h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: #111; }
.product-info p { color: #666; font-size: .9rem; line-height: 1.7; margin-bottom: 18px; }
.product-link {
  color: #e8a020; font-weight: 600; font-size: .88rem;
  display: inline-flex; align-items: center; gap: 6px;
  transition: gap .3s;
}
.product-link:hover { gap: 10px; }

/* ===========================
   INDUSTRIES
=========================== */
#industries { background: #f8f9fb; }
.industries-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.industry-item { border-radius: 8px; overflow: hidden; cursor: pointer; }
.industry-img {
  position: relative; height: 200px;
  background-size: cover; background-position: center;
  transition: transform .4s;
}
.industry-item:hover .industry-img { transform: scale(1.04); }
.industry-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.7) 0%, rgba(0,0,0,.1) 100%);
  transition: background .3s;
}
.industry-item:hover .industry-overlay { background: linear-gradient(to top, rgba(232,160,32,.7) 0%, rgba(0,0,0,.2) 100%); }
.industry-label {
  position: absolute; bottom: 18px; left: 18px;
  display: flex; align-items: center; gap: 8px; color: #fff;
}
.industry-label i { font-size: 1.1rem; }
.industry-label span { font-size: .95rem; font-weight: 600; }

/* ===========================
   WHY US
=========================== */
#why { padding: 0; }
.why-bg {
  background: linear-gradient(135deg, #0a0f1a 0%, #111b2e 100%);
  padding: 100px 0;
}
.section-header.light .section-title { color: #fff; }
.section-header.light .section-desc { color: #aaa; }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; margin-top: 60px; }
.why-item {
  text-align: center; padding: 40px 24px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 10px; transition: border-color .3s, background .3s;
}
.why-item:hover { border-color: rgba(232,160,32,.5); background: rgba(232,160,32,.05); }
.why-icon {
  width: 72px; height: 72px; border-radius: 50%;
  background: rgba(232,160,32,.15); color: #e8a020;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.7rem; margin: 0 auto 20px;
}
.why-item h3 { color: #fff; font-size: 1.05rem; font-weight: 700; margin-bottom: 12px; }
.why-item p { color: #aaa; font-size: .88rem; line-height: 1.75; }

/* ===========================
   PARTNERS
=========================== */
#partners { background: #fff; overflow: hidden; }
.partners-track-wrap {
  overflow: hidden; position: relative;
  mask-image: linear-gradient(to right, transparent, #fff 10%, #fff 90%, transparent);
}
.partners-track {
  display: flex; gap: 32px; width: max-content;
  animation: scrollTrack 22s linear infinite;
}
.partner-logo {
  min-width: 160px; height: 70px;
  display: flex; align-items: center; justify-content: center;
  background: #f4f5f7; border-radius: 6px;
  font-family: 'Roboto', sans-serif; font-weight: 700;
  font-size: 1rem; letter-spacing: 2px; color: #888;
  border: 1px solid #e8e9eb;
  transition: color .3s, border-color .3s;
}
.partner-logo:hover { color: #e8a020; border-color: #e8a020; }
@keyframes scrollTrack {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ===========================
   CONTACT
=========================== */
#contact { background: #f8f9fb; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 60px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 28px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon {
  min-width: 44px; height: 44px; border-radius: 50%;
  background: #e8a020; color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
}
.contact-item strong { display: block; font-size: .85rem; color: #888; font-weight: 500; margin-bottom: 4px; letter-spacing: .5px; }
.contact-item p { color: #333; font-size: .97rem; line-height: 1.6; }

.contact-form {
  background: #fff; border-radius: 12px; padding: 48px 40px;
  box-shadow: 0 4px 30px rgba(0,0,0,.08);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.form-group label { font-size: .88rem; font-weight: 600; color: #444; }
.form-group label span { color: #e8a020; }
.form-group input,
.form-group select,
.form-group textarea {
  border: 1.5px solid #dde0e6; border-radius: 6px;
  padding: 12px 14px; font-size: .93rem; font-family: inherit;
  color: #333; transition: border-color .3s;
  background: #fafbfc;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none; border-color: #e8a020; background: #fff;
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ===========================
   FOOTER
=========================== */
#footer { background: #080d18; color: #aaa; }
.footer-top { padding: 64px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1.5fr; gap: 48px; }
.footer-brand .logo-text { font-size: 1.5rem; }
.footer-brand p { margin-top: 16px; font-size: .88rem; line-height: 1.8; color: #888; }
.footer-links h4, .footer-contact h4 { color: #fff; font-size: .95rem; font-weight: 700; margin-bottom: 20px; letter-spacing: 1px; }
.footer-links ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links ul li a { color: #888; font-size: .88rem; transition: color .3s; }
.footer-links ul li a:hover { color: #e8a020; }
.footer-contact p { font-size: .88rem; color: #888; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.footer-contact p i { color: #e8a020; width: 14px; }
.footer-bottom {
  padding: 24px 0; display: flex; flex-direction: column;
  background: rgba(0,0,0,.3);
}
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.footer-bottom p { font-size: .82rem; color: #555; }

/* ===========================
   SCROLL TO TOP
=========================== */
.scroll-top {
  position: fixed; bottom: 32px; right: 32px; z-index: 900;
  width: 46px; height: 46px; border-radius: 50%;
  background: #e8a020; color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; box-shadow: 0 4px 16px rgba(232,160,32,.4);
  opacity: 0; pointer-events: none;
  transition: opacity .3s, transform .3s;
}
.scroll-top.visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover { transform: translateY(-4px); }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-badge { bottom: -16px; right: -10px; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .hamburger { display: flex; }
  #hero { height: 100svh; }
  .slide-content .btn-primary,
  .slide-content .btn-outline { display: block; margin: 0 auto 12px; max-width: 220px; text-align: center; }
  .about-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 32px 24px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
  section { padding: 72px 0; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
}