:root {
  --steel: #EEF1F3; --steel-2: #FFFFFF; --steel-3: #E4E9EC;
  --ink: #14191E; --ink-2: #1B242C;
  --accent: #D9822B; --accent-2: #2E6E86; --accent-dim: rgba(217, 130, 43, 0.16);
  --muted: #57626C;
  --line: rgba(20, 25, 30, 0.12);
  --heading-font: 'Noto Sans KR', 'Malgun Gothic', sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--steel); color: var(--ink); font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Malgun Gothic', sans-serif; font-size: 16px; line-height: 1.7; }
a { color: inherit; }
p { color: var(--ink); margin: 0 0 18px; }
h1, h2 { font-family: var(--heading-font); font-weight: 900; line-height: 1.3; color: var(--ink-2); }
h1 { font-size: clamp(2.05rem, 6.6vw, 3.1rem); margin: 6px 0 14px; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.42rem, 4.2vw, 1.9rem); margin: 0 0 16px; color: var(--accent-2); }
h3 { font-size: 1.02rem; font-weight: 700; margin: 0; color: var(--ink-2); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.section-inner { max-width: 1120px; margin: 0 auto; padding: 56px 20px; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.94); border-bottom: 3px solid var(--accent); }
.header-inner { max-width: 1280px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; position: relative; }
.logo { font-weight: 800; font-size: 1.1rem; text-decoration: none; color: var(--ink-2); }
.menu-toggle { background: var(--ink-2); border: none; border-radius: 4px; width: 44px; height: 44px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; cursor: pointer; }
.menu-toggle span { width: 20px; height: 2px; background: var(--accent); display: block; }
#primary-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; border-top: 1px solid var(--line); flex-direction: column; padding: 8px 20px 16px; box-shadow: 0 12px 24px rgba(20,25,30,0.10); }
#primary-nav.is-open { display: flex; }
#primary-nav a { display: flex; align-items: center; min-height: 44px; text-decoration: none; color: var(--ink); border-bottom: 1px solid var(--line); }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 14px 28px; border: none; text-decoration: none; font-weight: 800; font-size: 0.96rem; border-radius: 4px; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 18px rgba(217,130,43,0.32); position: relative; }
.btn-primary::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: repeating-linear-gradient(45deg, #fff, #fff 4px, transparent 4px, transparent 8px); opacity: 0.55; }
.btn-ghost { background: transparent; color: var(--ink-2); border: 2px solid var(--ink-2); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 22px; }

.hero { position: relative; background: linear-gradient(180deg, var(--ink-2) 0%, #23323D 62%, var(--steel) 100%); overflow: hidden; }
.dock-circuit { position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.045) 0 2px, transparent 2px 64px),
    radial-gradient(circle at 88% 8%, rgba(217,130,43,0.55), transparent 40%),
    radial-gradient(circle at 6% 82%, rgba(46,110,134,0.55), transparent 44%);
  background-size: 64px 100%, 100% 64px, auto, auto;
}
.dock-circuit::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: 0; height: 46%;
  background-image: repeating-linear-gradient(90deg, rgba(255,255,255,0.10) 0 2px, transparent 2px 46px);
  -webkit-mask-image: linear-gradient(0deg, rgba(0,0,0,0.85), transparent);
  mask-image: linear-gradient(0deg, rgba(0,0,0,0.85), transparent);
}
.hero-inner { position: relative; z-index: 1; padding: 48px 20px 58px; max-width: 720px; margin: 0 auto; text-align: left; }
.eyebrow { font-size: 0.78rem; letter-spacing: 0.13em; color: var(--accent); margin: 0 0 10px; font-weight: 800; text-transform: uppercase; }
h1 { color: #fff; }
.hero-sub { color: #C7D2D9; font-size: 1.02rem; margin-bottom: 0; }

.content-section { border-top: 1px solid var(--line); }
.content-grid { display: block; }
.content-main h2:not(:first-child) { margin-top: 40px; }
.content-main h2 { padding-left: 14px; border-left: 5px solid var(--accent); }
.content-main a { color: var(--accent-2); text-decoration: underline; text-underline-offset: 3px; }
.content-side { margin-top: 40px; }
.fact-box { background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--accent-2); border-radius: 6px; padding: 28px 24px; box-shadow: 0 10px 26px rgba(20,25,30,0.07); }
.fact-box h2 { font-size: 1.35rem; margin-bottom: 18px; border-left: none; padding-left: 0; }
.fact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.fact-list li { padding-left: 24px; position: relative; font-size: 0.95rem; color: var(--ink); }
.fact-list li::before { content: ''; position: absolute; left: 0; top: 6px; width: 10px; height: 10px; background: var(--accent); clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%); }

.related-section { border-top: 1px solid var(--line); }
.related-section ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 12px; }
.related-section li { margin: 0; }
.related-section a {
  display: inline-flex; align-items: center; min-height: 40px;
  padding: 10px 22px; border-radius: 4px;
  background: #fff; border: 1px solid var(--line);
  color: var(--accent-2); text-decoration: none; font-weight: 800; font-size: 0.92rem;
  box-shadow: 0 8px 18px rgba(20,25,30,0.06);
  transition: background 0.15s ease, transform 0.15s ease;
}
.related-section a:hover { background: var(--accent-dim); transform: translateY(-2px); }

.faq-section { background: var(--steel-3); border-top: 1px solid var(--line); }
.accordion-item { border-bottom: 1px solid var(--line); }
.accordion-trigger { width: 100%; text-align: left; min-height: 44px; background: none; border: none; color: var(--ink); font-size: 1rem; font-weight: 800; padding: 16px 4px; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 12px; font-family: inherit; }
.accordion-trigger::after { content: '+'; color: var(--accent); font-size: 1.3rem; }
.accordion-trigger[aria-expanded="true"]::after { content: '\2212'; }
.accordion-panel { padding: 0 4px 18px; }

.cta-section { background: var(--ink-2); border-top: 3px solid var(--accent); }
.cta-section h2 { color: #fff; }
.cta-section p { color: #C7D2D9; }

.site-footer { background: #10151A; padding: 16px 20px; }
address { max-width: 1120px; margin: 0 auto; font-style: normal; color: #8B98A2; font-size: 0.88rem; line-height: 1.8; }
.site-photo-section { max-width: 1000px; margin: 0 auto; padding: 40px 20px; text-align: center; }
.site-photo-grid { display: grid; grid-template-columns: 1fr; gap: 12px; justify-content: center; max-width: 760px; margin: 0 auto; }
.site-photo-grid picture { display: block; aspect-ratio: 4/3; overflow: hidden; border-radius: 6px; }
.site-photo-grid img { width: 100%; height: 100%; object-fit: cover; }

@media (min-width: 640px) { .site-photo-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 768px) {
  #primary-nav { position: static; display: flex !important; flex-direction: row; background: none; border: none; padding: 0; gap: 20px; box-shadow: none; }
  #primary-nav a { border-bottom: none; min-height: auto; }
  .menu-toggle { display: none; }
}
@media (min-width: 1024px) {
  .content-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 48px; align-items: start; }
  .content-side { margin-top: 0; position: sticky; top: 90px; }
}