/* ═══════════════════════════════════════════════════
   WEROLAKER — Solutions Page Shared Stylesheet
═══════════════════════════════════════════════════ */

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

:root {
  --bg:       #000000;
  --surface:  #0e0e0e;
  --surface2: #161616;
  --primary:  #00FFC3;
  --accent:   #FF5C00;
  --white:    #FFFFFF;
  --sub:      #888888;
  --sub2:     #555555;
  --border:   rgba(255,255,255,0.08);
  --fh: 'Inter', sans-serif;
  --fb: 'Pretendard Variable', 'Pretendard', -apple-system, sans-serif;
  --max: 1280px;
  --px:  80px;
  --e:   cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--fb);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ── SCROLL REVEAL ── */
.rv {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s var(--e), transform .7s var(--e);
}
.rv.on { opacity: 1; transform: translateY(0); }
.rv-d1 { transition-delay: .1s; }
.rv-d2 { transition-delay: .2s; }
.rv-d3 { transition-delay: .3s; }
.rv-d4 { transition-delay: .4s; }
.rv-d5 { transition-delay: .5s; }

/* ══════════════════════════════════════
   HEADER
══════════════════════════════════════ */
#hd {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: 68px;
  padding: 0 var(--px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background .3s;
}
#hd.scrolled { background: rgba(0,0,0,0.85); }

.hd-logo {
  font-family: var(--fh);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.hd-logo b { color: var(--primary); }

.hd-nav {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}
.hd-nav a {
  font-family: var(--fb);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.7);
  transition: color .2s;
}
.hd-nav a:hover, .hd-nav a.active { color: var(--white); }

.hd-btn {
  font-family: var(--fb);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 22px;
  background: var(--white);
  color: var(--bg);
  border-radius: 100px;
  transition: opacity .2s, transform .2s;
}
.hd-btn:hover { opacity: .88; transform: translateY(-1px); }

/* ══════════════════════════════════════
   SUB TOP — Page Title Area
══════════════════════════════════════ */
.sub-top {
  padding-top: 120px;
  padding-bottom: 60px;
  padding-left: var(--px);
  padding-right: var(--px);
  max-width: var(--max);
  margin: 0 auto;
}

.sub-top-eyebrow {
  font-family: var(--fb);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.sub-top-eyebrow::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--primary);
}

.sub-top-title {
  font-family: var(--fh);
  font-size: clamp(52px, 7vw, 100px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.sub-top-subtitle {
  font-family: var(--fh);
  font-size: clamp(14px, 1.5vw, 18px);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sub);
  margin-bottom: 24px;
  padding-left: 2px;
}

.sub-top-desc {
  font-family: var(--fb);
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.7;
  color: rgba(255,255,255,0.65);
  max-width: 580px;
}

/* ══════════════════════════════════════
   HERO VISUAL
══════════════════════════════════════ */
.sub-visual {
  width: 100%;
  height: clamp(300px, 42vw, 580px);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}
.sub-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.55) 100%);
}
.sub-visual-scroll {
  position: absolute;
  bottom: 28px;
  right: 40px;
  z-index: 2;
  width: 80px;
  height: 80px;
}
.sub-visual-scroll svg {
  width: 80px;
  height: 80px;
  animation: spin-slow 12s linear infinite;
}
.sub-visual-scroll svg text {
  fill: rgba(255,255,255,0.7);
  font-size: 10.5px;
  font-family: var(--fb);
  letter-spacing: 3px;
}
@keyframes spin-slow { to { transform: rotate(360deg); } }

/* ══════════════════════════════════════
   KEYWORD MARQUEE
══════════════════════════════════════ */
.marquee-wrap {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  overflow: hidden;
}
.marquee-track {
  display: flex;
  gap: 0;
  white-space: nowrap;
  animation: marquee-scroll 28s linear infinite;
}
.marquee-track:hover { animation-play-state: paused; }
.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 28px;
  font-family: var(--fb);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.55);
  border-right: 1px solid var(--border);
  white-space: nowrap;
  flex-shrink: 0;
}
.marquee-item .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}
@keyframes marquee-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ══════════════════════════════════════
   SHARED SECTION WRAPPER
══════════════════════════════════════ */
.sol-section {
  padding: 100px var(--px);
}
.sol-section.surface { background: var(--surface); }
.sol-section.surface2 { background: var(--surface2); }

.sol-section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section-eyebrow {
  font-family: var(--fb);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-eyebrow::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--primary);
}

.section-title {
  font-family: var(--fh);
  font-size: clamp(32px, 3.5vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--sub);
  max-width: 600px;
}

/* ══════════════════════════════════════
   INTRODUCTION SECTION
══════════════════════════════════════ */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  margin-bottom: 64px;
}

.intro-left .section-title {
  font-size: clamp(28px, 3vw, 44px);
}

.intro-right p {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255,255,255,0.7);
  margin-bottom: 20px;
}

.key-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.kv-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  background: var(--surface2);
  transition: border-color .3s, transform .3s;
}
.kv-card:hover { border-color: rgba(0,255,195,0.3); transform: translateY(-4px); }

.kv-num {
  font-family: var(--fb);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.kv-title {
  font-family: var(--fh);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
}
.kv-desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--sub);
}

/* ══════════════════════════════════════
   STATS SECTION
══════════════════════════════════════ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  margin-top: 56px;
}
.stat-item {
  background: var(--surface);
  padding: 44px 32px;
  transition: background .3s;
}
.stat-item:hover { background: var(--surface2); }
.stat-num {
  font-family: var(--fh);
  font-size: clamp(36px, 4vw, 58px);
  font-weight: 900;
  line-height: 1;
  color: var(--primary);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.stat-label {
  font-family: var(--fb);
  font-size: 13px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 8px;
}
.stat-desc {
  font-size: 12px;
  line-height: 1.6;
  color: var(--sub);
}

/* ══════════════════════════════════════
   WHAT WE DO SECTION
══════════════════════════════════════ */
.what-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 56px;
  gap: 40px;
}

.what-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}
.what-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 0;
  border-bottom: 1px solid var(--border);
  transition: background .25s;
}
.what-item:last-child { border-bottom: none; }
.what-item:hover { background: var(--surface2); }

.what-num {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 32px 0;
  font-family: var(--fh);
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.06em;
  border-right: 1px solid var(--border);
}
.what-content {
  padding: 32px 36px;
}
.what-title {
  font-family: var(--fh);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.what-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--sub);
}

/* ══════════════════════════════════════
   APPROACH SECTION
══════════════════════════════════════ */
.approach-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  margin-top: 56px;
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}
.step-item {
  padding: 40px 28px;
  border-right: 1px solid var(--border);
  transition: background .25s;
  position: relative;
}
.step-item:last-child { border-right: none; }
.step-item:hover { background: var(--surface2); }

.step-num {
  font-family: var(--fh);
  font-size: 40px;
  font-weight: 900;
  color: rgba(255,255,255,0.06);
  line-height: 1;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}
.step-label {
  font-family: var(--fb);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.step-title {
  font-family: var(--fh);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}
.step-desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--sub);
}

/* ══════════════════════════════════════
   BENEFITS SECTION
══════════════════════════════════════ */
.benefits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  margin-top: 56px;
}
.benefit-item {
  background: var(--surface);
  padding: 44px 40px;
  display: flex;
  gap: 28px;
  transition: background .25s;
}
.benefit-item:hover { background: var(--surface2); }
.benefit-num {
  font-family: var(--fh);
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.06em;
  flex-shrink: 0;
  padding-top: 3px;
}
.benefit-body {}
.benefit-title {
  font-family: var(--fh);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
}
.benefit-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--sub);
}

/* ══════════════════════════════════════
   FAQ SECTION
══════════════════════════════════════ */
.faq-list {
  margin-top: 56px;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.faq-item:last-child { border-bottom: none; }

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 36px;
  cursor: pointer;
  gap: 20px;
  user-select: none;
  transition: background .2s;
}
.faq-q:hover { background: var(--surface2); }
.faq-q-text {
  font-family: var(--fb);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 16px;
  color: var(--primary);
  transition: transform .3s var(--e), background .2s;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: rgba(0,255,195,0.1);
  border-color: rgba(0,255,195,0.3);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s var(--e);
}
.faq-a-inner {
  padding: 0 36px 28px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sub);
}

/* ══════════════════════════════════════
   CTA SECTION
══════════════════════════════════════ */
.cta-section {
  padding: 120px var(--px);
  text-align: center;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.cta-inner {
  max-width: var(--max);
  margin: 0 auto;
}
.cta-label {
  font-family: var(--fb);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 20px;
}
.cta-title {
  font-family: var(--fh);
  font-size: clamp(36px, 4.5vw, 64px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.cta-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--sub);
  max-width: 480px;
  margin: 0 auto 40px;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 40px;
  background: var(--primary);
  color: #000;
  font-family: var(--fb);
  font-weight: 700;
  font-size: 15px;
  border-radius: 100px;
  transition: transform .2s var(--e), box-shadow .2s;
}
.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,255,195,0.25);
}

/* ══════════════════════════════════════
   FOOTER
══════════════════════════════════════ */
.sol-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 0 var(--px);
}
.sol-footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  padding: 40px 0 36px;
}
.sol-footer-left { flex: 1; max-width: 600px; }
.sol-footer-logo-lg {
  font-family: var(--fh);
  font-size: 72px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--white);
  display: block;
  line-height: 1;
  margin-bottom: 16px;
  text-decoration: none;
}
.sol-footer-logo-lg b { color: var(--primary); }
.sol-footer-right { display: flex; gap: 60px; flex-shrink: 0; }
.sol-ft-col-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.01em;
  margin-bottom: 16px;
}
.sol-ft-col-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sol-ft-col-nav a {
  font-size: 14px;
  color: var(--sub);
  text-decoration: none;
  transition: color .2s;
}
.sol-ft-col-nav a:hover { color: var(--white); }
.sol-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
}
.sol-footer-copy { font-size: 12px; color: var(--sub2); }

/* ══════════════════════════════════════
   NAV BACK STRIP
══════════════════════════════════════ */
.sol-nav-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-family: var(--fb);
  font-size: 12px;
  font-weight: 600;
  color: var(--sub);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 28px;
  transition: color .2s;
}
.sol-nav-back:hover { color: var(--white); }
.sol-nav-back::before {
  content: '←';
  font-size: 14px;
}

/* ══════════════════════════════════════
   OTHER SOLUTIONS NAV
══════════════════════════════════════ */
.other-sol {
  padding: 80px var(--px);
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.other-sol-inner {
  max-width: var(--max);
  margin: 0 auto;
}
.other-sol-label {
  font-family: var(--fb);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--sub);
  text-transform: uppercase;
  margin-bottom: 32px;
}
.other-sol-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.other-sol-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  background: var(--surface);
  transition: border-color .3s, transform .3s;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.other-sol-card:hover { border-color: rgba(0,255,195,0.25); transform: translateY(-3px); }
.other-sol-card.active {
  border-color: rgba(0,255,195,0.4);
  background: rgba(0,255,195,0.04);
  pointer-events: none;
}
.osc-num {
  font-family: var(--fb);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--primary);
  text-transform: uppercase;
}
.osc-title {
  font-family: var(--fh);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}
.osc-arrow {
  font-size: 16px;
  color: var(--sub);
  margin-top: auto;
  transition: transform .2s, color .2s;
}
.other-sol-card:hover .osc-arrow { transform: translateX(4px); color: var(--primary); }

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media (max-width: 1024px) {
  :root { --px: 40px; }
  .intro-grid { grid-template-columns: 1fr; gap: 48px; }
  .key-values { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .approach-steps { grid-template-columns: 1fr 1fr; }
  .approach-steps .step-item:nth-child(2) { border-right: none; }
  .benefits-grid { grid-template-columns: 1fr; }
  .other-sol-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  :root { --px: 20px; }
  .hd-nav { display: none; }
  .key-values { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .what-item { grid-template-columns: 56px 1fr; }
  .approach-steps { grid-template-columns: 1fr; }
  .approach-steps .step-item { border-right: none; border-bottom: 1px solid var(--border); }
  .approach-steps .step-item:last-child { border-bottom: none; }
  .other-sol-grid { grid-template-columns: 1fr 1fr; }
  .sol-footer { flex-direction: column; text-align: center; }
  .what-header { flex-direction: column; align-items: flex-start; }
}

/* ══════════════════════════════════════
   BIZ FOOTER — 사업자 정보
══════════════════════════════════════ */
.biz-footer {
  background: #080808;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 32px var(--px);
}
.biz-footer-inner {
  max-width: var(--max);
  margin: 0 auto;
}
.biz-info {
  font-size: 12.5px;
  color: rgba(255,255,255,0.45);
  line-height: 2;
}
.biz-info .sep { margin: 0 8px; opacity: 0.4; }
.biz-divider { display: none; }
.biz-disclaimer {
  font-size: 12px;
  color: rgba(255,255,255,0.3);
  line-height: 1.85;
}