/* ═══ 디자인 클론: top.gnssign.com ═══
   Primary: #3b4a3f / 배경: #fff / #f8f8f8
   폰트: Pretendard, Noto Sans KR
   카드: 0.75rem, 0 4px 20px rgba(0,0,0,0.08)
   버튼: 0.375rem
   레이아웃: 1200px, 1.5rem~2rem
   헤더: 64px fixed white
   ═══════════════════════════════════ */

:root {
  --primary: #3b4a3f;
  --primary-light: #4d5e51;
  --primary-dark: #2a3a2e;
  --bg-white: #fff;
  --bg-gray: #f8f8f8;
  --text-dark: #1a1a1a;
  --text-muted: #666;
  --card-radius: 0.75rem;
  --btn-radius: 0.375rem;
  --max-width: 1200px;
  --section-padding: 5rem 1.5rem;
  --header-height: 64px;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-header: 0 1px 4px rgba(0,0,0,0.08);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--bg-white);
  word-break: keep-all;
  overflow-wrap: break-word;
  padding-top: var(--header-height);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ─── 레이아웃 컨테이너 ─── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page-wrapper {
  min-height: calc(100vh - var(--header-height));
}

/* ─── 타이포그래피 ─── */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-dark);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.0625rem;
  max-width: 640px;
}

.text-center { text-align: center; }
.text-center .section-desc { margin: 0 auto; }

/* ─── 버튼 ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--btn-radius);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.15s ease;
  border: 2px solid transparent;
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1.0625rem;
}

/* ─── 섹션 공통 ─── */
.section {
  padding: var(--section-padding);
}
.section--gray { background: var(--bg-gray); }
.section--dark {
  background: var(--primary-dark);
  color: #fff;
}
.section--dark h2,
.section--dark h3 { color: #fff; }

/* ─── Header ─── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-white);
  height: var(--header-height);
  box-shadow: var(--shadow-header);
  transition: box-shadow var(--transition);
}

.site-header.is-scrolled {
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex: 1;
}

.header-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-dark);
  transition: color var(--transition);
}

.header-nav a:hover { color: var(--primary); }

.header-cta {
  margin-left: auto;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

/* ─── Hero 섹션 ─── */
.hero-section {
  padding: 0;
  min-height: 560px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: stretch;
}

.hero-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  min-height: 560px;
}

.hero-img-wrapper {
  position: relative;
  overflow: hidden;
}

.hero-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-img-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.52) 0%, rgba(0,0,0,0.18) 100%);
}

.hero-img-wrapper:last-child::after {
  background: linear-gradient(to left, rgba(0,0,0,0.38) 0%, rgba(0,0,0,0.1) 100%);
}

.hero-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 3rem 3rem;
  z-index: 2;
  max-width: 700px;
}

.hero-content h1 {
  color: #fff;
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 1rem;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.hero-slogan {
  color: rgba(255,255,255,0.92);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.6;
  margin-bottom: 2rem;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ─── 페인포인트 섹션 ─── */
.painpoint-section {
  background: var(--bg-gray);
}

.painpoint-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-top: 3rem;
}

.painpoint-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.painpoint-item {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1.25rem;
  background: var(--bg-white);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
}

.painpoint-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  margin-top: 0.1rem;
  color: var(--primary);
}

.painpoint-item p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-dark);
}

.painpoint-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.painpoint-images img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
}

/* ─── 특장점 카드 ─── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  border-top: 3px solid var(--primary);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(59, 74, 63, 0.08);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--primary-dark);
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ─── Before / After 비교 ─── */
.compare-section {
  background: var(--bg-gray);
}

.compare-wrapper {
  max-width: 900px;
  margin: 3rem auto 0;
}

.compare-card {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.compare-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.compare-half {
  position: relative;
  overflow: hidden;
}

.compare-half img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.compare-label {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(0,0,0,0.65);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.75rem;
  border-radius: 0.25rem;
}

.compare-half.after .compare-label {
  background: var(--primary);
}

.compare-divider {
  position: relative;
  display: flex;
  align-items: center;
}

.compare-divider::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  border-top: 2px dashed #ddd;
}

.compare-info {
  padding: 1.5rem 2rem;
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.compare-info-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.compare-info-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
}

.compare-info-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary-dark);
}

/* ─── 시공사례 갤러리 ─── */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.case-card {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.case-card-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}

.case-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.case-card:hover .case-card-thumb img {
  transform: scale(1.04);
}

.case-card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.case-card-tag {
  font-size: 0.8125rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.case-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.case-card-sub {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: auto;
}

.case-card-link {
  display: block;
  color: inherit;
}

.gallery-hidden {
  display: none;
}

.cases-more-btn {
  margin-top: 2.5rem;
  text-align: center;
}

/* ─── 서비스 카드 ─── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

@media (min-width: 769px) {
  .services-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.service-card {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.service-card-icon {
  width: 52px;
  height: 52px;
  background: rgba(59,74,63,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.service-card h3 {
  font-size: 0.9375rem;
  color: var(--primary-dark);
  line-height: 1.4;
}

.service-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.service-card .btn {
  font-size: 0.8125rem;
  padding: 0.5rem 1rem;
  margin-top: auto;
}

/* ─── 신뢰 카드 ─── */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.trust-card {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.trust-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--primary-light));
}

.trust-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(59,74,63,0.12);
  line-height: 1;
  margin-bottom: 1rem;
}

.trust-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--primary-dark);
}

.trust-card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ─── FAQ 아코디언 ─── */
.faq-section {
  background: var(--bg-gray);
}

.faq-list {
  max-width: 800px;
  margin: 3rem auto 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  transition: color var(--transition);
}

.faq-question:hover { color: var(--primary); }

.faq-question.is-open { color: var(--primary); }

.faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-question.is-open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.faq-answer-inner a {
  color: var(--primary);
  text-decoration: underline;
}

/* ─── CTA 섹션 ─── */
.cta-section {
  background: var(--primary-dark);
  padding: var(--section-padding);
  text-align: center;
}

.cta-section h2 {
  color: #fff;
  margin-bottom: 1rem;
}

.cta-section .section-desc {
  color: rgba(255,255,255,0.8);
  margin: 0 auto 2rem;
}

.cta-btn-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.cta-section .btn-primary {
  background: #fff;
  color: var(--primary-dark);
  border-color: #fff;
}
.cta-section .btn-primary:hover {
  background: rgba(255,255,255,0.9);
  border-color: rgba(255,255,255,0.9);
}

.cta-section .btn-outline {
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.cta-section .btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

.trust-badges {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 2rem;
  padding: 0.5rem 1.25rem;
  color: rgba(255,255,255,0.9);
  font-size: 0.875rem;
  font-weight: 500;
}

.trust-badge svg {
  color: rgba(255,255,255,0.7);
}

/* ─── Footer ─── */
.site-footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.8);
  padding: 3rem 1.5rem 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  gap: 3rem;
  padding-bottom: 2rem;
  flex-wrap: wrap;
}

.footer-brand {
  flex: 1;
  min-width: 200px;
}

.footer-logo {
  display: inline-flex;
  margin-bottom: 0.75rem;
}

.footer-brand-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.5rem;
}

.footer-meta {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 0.25rem;
}

.footer-nav a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}

.footer-nav a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 1.25rem 0;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.4);
}

/* ─── Floating 버튼 ─── */
.floating-cta {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-end;
}

.floating-btn {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.875rem 1.25rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0,0,0,0.18);
  transition: transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.floating-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.22);
}

.floating-btn-primary {
  background: var(--primary);
  color: #fff;
  position: relative;
}

.floating-btn-tel {
  background: #fff;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.pulse-ring {
  position: absolute;
  inset: -4px;
  border-radius: 2rem;
  border: 2px solid var(--primary);
  animation: pulseRing 2s ease-out infinite;
  pointer-events: none;
}

@keyframes pulseRing {
  0%   { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.2); opacity: 0; }
}

/* ─── fade-in-up 애니메이션 ─── */
.fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Contact 페이지 ─── */
.contact-section {
  padding: var(--section-padding);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.step-card {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  text-align: center;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #fff;
  font-size: 1.125rem;
  font-weight: 800;
  border-radius: 50%;
  margin: 0 auto 1.25rem;
}

.step-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.625rem;
  color: var(--primary-dark);
}

.step-card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.contact-cta-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 2.5rem 0;
}

.contact-notice {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.25rem 1.75rem;
  background: rgba(59,74,63,0.06);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
  font-size: 0.9375rem;
  color: var(--text-dark);
}

/* 모바일에서만 SMS 버튼 표시 */
.mobile-only { display: none; }
@media (max-width: 768px) {
  .mobile-only { display: flex; }
  .desktop-only { display: none; }
}

/* ─── Cases 페이지 ─── */
.page-hero {
  padding: 4rem 1.5rem 3rem;
  text-align: center;
  background: var(--bg-gray);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.page-hero h1 {
  margin-bottom: 0.75rem;
}

.page-hero p {
  color: var(--text-muted);
  font-size: 1.0625rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ─── 포트폴리오 상세 ─── */
.portfolio-detail {
  padding: 3rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.portfolio-info-bar {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  padding: 1.25rem 1.75rem;
  background: var(--bg-gray);
  border-radius: var(--card-radius);
  margin-bottom: 2.5rem;
}

.portfolio-info-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.portfolio-info-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
}

.portfolio-info-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-dark);
}

.portfolio-block {
  margin-bottom: 3rem;
}

.portfolio-block-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 1.25rem;
  padding-bottom: 0.625rem;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}

.portfolio-img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.portfolio-img-grid img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--card-radius);
  cursor: pointer;
  transition: transform var(--transition);
}

.portfolio-img-grid img:hover { transform: scale(1.02); }

.portfolio-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.portfolio-process-steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.process-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
}

.process-step-num {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9375rem;
  flex-shrink: 0;
}

.process-step-content h4 {
  font-size: 1rem;
  margin-bottom: 0.375rem;
  color: var(--primary-dark);
}

.process-step-content p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ─── 포트폴리오 상세: before/after 비교 ─── */
.pf-compare-section {
  padding: 0 0 3rem;
}

.pf-compare-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 1.75rem;
  padding-bottom: 0.625rem;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}

.pf-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.pf-compare-card {
  position: relative;
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.pf-compare-img-wrap {
  aspect-ratio: 3/4;
  overflow: hidden;
}

.pf-compare-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.pf-compare-card:hover .pf-compare-img-wrap img {
  transform: scale(1.03);
}

.pf-compare-badge {
  position: absolute;
  top: 0.875rem;
  left: 0.875rem;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  padding: 0.3rem 0.75rem;
  border-radius: 0.25rem;
  color: #fff;
}

.pf-badge-before {
  background: rgba(0,0,0,0.55);
}

.pf-badge-after {
  background: var(--primary);
}

.portfolio-summary {
  padding: 1.5rem 2rem;
  background: rgba(59,74,63,0.05);
  border-radius: var(--card-radius);
  border-left: 3px solid var(--primary);
  margin-top: 0;
}

.portfolio-summary-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 1rem;
}

.portfolio-summary ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.portfolio-summary li {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--text-dark);
}

.portfolio-summary li svg {
  color: var(--primary);
  flex-shrink: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--primary);
}

.page-hero-sub {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 0.25rem;
}

@media (max-width: 600px) {
  .pf-compare-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .pf-compare-img-wrap {
    aspect-ratio: 4/3;
  }
}

/* ─── NSEO 페이지 ─── */
.sub-hero {
  position: relative;
  min-height: 380px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--primary-dark);
}

.sub-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.sub-hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.sub-hero-content h1 {
  color: #fff;
  margin-bottom: 1rem;
}

.sub-hero-content p {
  color: rgba(255,255,255,0.85);
  font-size: 1.0625rem;
  max-width: 600px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.sub-hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.nseo-about {
  padding: var(--section-padding);
}

.nseo-about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-top: 2rem;
}

.nseo-about-text p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}

.nseo-about-img img {
  width: 100%;
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
}

.nseo-gallery {
  padding: var(--section-padding);
  background: var(--bg-gray);
}

.nseo-gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.nseo-gallery-grid img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--card-radius);
  cursor: pointer;
  transition: transform var(--transition);
}

.nseo-gallery-grid img:hover { transform: scale(1.02); }

.nseo-steps {
  padding: var(--section-padding);
}

.nseo-steps-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 2rem;
  max-width: 720px;
}

.nseo-step-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-white);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
}

.nseo-step-num {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.nseo-step-item p {
  font-size: 0.9375rem;
  color: var(--text-dark);
  padding-top: 0.375rem;
}

.related-services {
  padding: var(--section-padding);
  background: var(--bg-gray);
}

.related-services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.related-card {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition);
  display: block;
}

.related-card:hover { transform: translateY(-3px); }

.related-card h4 {
  font-size: 0.9375rem;
  margin-bottom: 0.375rem;
  color: var(--primary-dark);
}

.related-card p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── Lightbox ─── */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.lightbox-overlay.is-open {
  display: flex;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 0.25rem;
}

.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: background var(--transition);
}

.lightbox-close:hover { background: rgba(255,255,255,0.2); }

/* ─── 404 페이지 ─── */
.error-404 {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1.5rem;
  text-align: center;
}

.error-404-code {
  font-size: 6rem;
  font-weight: 800;
  color: rgba(59,74,63,0.12);
  line-height: 1;
  margin-bottom: 1rem;
}

.error-404 h1 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.error-404 p {
  color: var(--text-muted);
  font-size: 1.0625rem;
  margin-bottom: 2rem;
  max-width: 480px;
}

/* ─── 반응형: 768px 이하 ─── */
@media (max-width: 768px) {
  :root {
    --section-padding: 3.5rem 1.25rem;
    --header-height: 56px;
  }

  body { padding-top: var(--header-height); }

  .header-nav { display: none; }
  .header-inner { gap: 1rem; }
  .header-cta { margin-left: auto; }

  .hero-images { grid-template-columns: 1fr; }
  .hero-images .hero-img-wrapper:last-child { display: none; }
  .hero-content { padding: 2rem 1.25rem; }

  .painpoint-grid { grid-template-columns: 1fr; gap: 2rem; }
  .painpoint-images { grid-template-columns: 1fr 1fr; }

  .features-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }

  .compare-split { grid-template-columns: 1fr; }
  .compare-half:last-child { display: none; }
  .compare-info { gap: 1rem; }

  .cases-grid { grid-template-columns: 1fr 1fr; }

  .services-grid { grid-template-columns: repeat(2, 1fr); }

  .steps-grid { grid-template-columns: 1fr; }

  .nseo-about-grid { grid-template-columns: 1fr; }

  .nseo-gallery-grid { grid-template-columns: 1fr; }

  .related-services-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-inner { flex-direction: column; gap: 2rem; }
  .footer-nav { flex-direction: row; flex-wrap: wrap; gap: 1rem; }

  .floating-cta { bottom: 1.25rem; right: 1rem; }
}

@media (max-width: 480px) {
  .cases-grid { grid-template-columns: 1fr; }
  .portfolio-compare { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════
   page-sub.php 전용 스타일
   ═══════════════════════════════════════════════════ */

/* ─── 텍스트 히어로 ─── */
.sub-text-hero {
  background: var(--primary);
  color: #fff;
  padding: 4rem 1.5rem 3.5rem;
}

.sub-text-hero .container {
  max-width: var(--max-width);
}

.sub-text-hero h1 {
  color: #fff;
  font-size: clamp(1.875rem, 4.5vw, 2.75rem);
  margin-bottom: 1rem;
}

.sub-hero-desc {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.85);
  max-width: 640px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.sub-hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ─── 브레드크럼 ─── */
.breadcrumb-nav {
  margin-bottom: 1.25rem;
}

.breadcrumb-nav ol {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  list-style: none;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
}

.breadcrumb-nav a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb-nav a:hover { color: #fff; }

.breadcrumb-nav [aria-current="page"] {
  color: rgba(255,255,255,0.95);
  font-weight: 600;
}

/* ─── 증상 카드 (3-col grid) ─── */
.symptom-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.symptom-card {
  background: var(--bg-white);
  border: 1.5px solid #e8ecec;
  border-radius: var(--card-radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.symptom-card:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,0.12);
  transform: translateY(-2px);
}

.symptom-icon {
  width: 52px;
  height: 52px;
  background: rgba(59,74,63,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.symptom-card p {
  font-size: 0.9375rem;
  color: var(--text-dark);
  line-height: 1.6;
  margin: 0;
}

/* ─── 원인 분석 ─── */
.causes-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
  list-style: none;
}

.cause-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  background: var(--bg-white);
  border-radius: var(--card-radius);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-card);
}

.cause-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(59,74,63,0.12);
  line-height: 1;
  flex-shrink: 0;
  min-width: 3rem;
  user-select: none;
}

.cause-body h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.cause-body p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

/* ─── 해결 방법 ─── */
.solution-box {
  background: var(--bg-white);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
  padding: 2rem 2.25rem;
  box-shadow: var(--shadow-card);
  margin-top: 2rem;
}

.solution-box > p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-dark);
  margin-bottom: 1.5rem;
}

.solution-points {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  list-style: none;
}

.solution-points li {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--primary-dark);
}

.solution-points li svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* ─── 시공 순서 타임라인 ─── */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 2.5rem;
  position: relative;
}

.process-timeline::before {
  content: '';
  position: absolute;
  top: 1.875rem;
  left: calc(100% / 8);
  right: calc(100% / 8);
  height: 2px;
  background: rgba(59,74,63,0.15);
  z-index: 0;
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 1rem 1rem;
  position: relative;
  z-index: 1;
}

.process-step-num {
  width: 3.75rem;
  height: 3.75rem;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(59,74,63,0.3);
}

.process-step-body p {
  font-size: 0.875rem;
  color: var(--text-dark);
  line-height: 1.5;
  margin: 0;
}

/* ─── FAQ 아코디언 ─── */
.sub-faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 2rem;
  list-style: none;
}

.sub-faq-item {
  border: 1.5px solid #e8ecec;
  border-radius: var(--card-radius);
  overflow: hidden;
  background: var(--bg-white);
}

.sub-faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  transition: background var(--transition);
}

.sub-faq-question:hover { background: var(--bg-gray); }

.sub-faq-question[aria-expanded="true"] { background: var(--bg-gray); }

.faq-chevron {
  flex-shrink: 0;
  transition: transform 0.25s ease;
  color: var(--primary);
}

.sub-faq-question[aria-expanded="true"] .faq-chevron {
  transform: rotate(180deg);
}

.sub-faq-answer {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid #e8ecec;
}

.sub-faq-answer p { margin: 0.75rem 0 0; }

/* ─── 관련 세부 서비스 그리드 ─── */
.related-sub-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.related-sub-card {
  background: var(--bg-white);
  border: 1.5px solid #e8ecec;
  border-radius: var(--card-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-decoration: none;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.related-sub-card:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
  transform: translateY(-2px);
  border-color: var(--primary);
}

.related-sub-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0;
}

.related-sub-card p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-sub-link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 0.25rem;
}

/* ─── 사이트맵 페이지 ─── */
.sitemap-layout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.sitemap-group-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
  padding-bottom: 0.625rem;
  border-bottom: 2px solid rgba(59,74,63,0.15);
}

.sitemap-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  list-style: none;
}

.sitemap-links a {
  font-size: 0.9375rem;
  color: var(--text-dark);
  text-decoration: none;
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.sitemap-links a::before {
  content: '–';
  color: var(--primary);
  font-weight: 700;
}

.sitemap-links a:hover { color: var(--primary); }

.sitemap-pending {
  font-size: 0.9375rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.sitemap-pending::before {
  content: '–';
  color: #ccc;
}

/* ─── 반응형: 세부 서비스 (1024px 이하) ─── */
@media (max-width: 1024px) {
  .process-timeline { grid-template-columns: repeat(2, 1fr); }
  .process-timeline::before { display: none; }
  .process-step { flex-direction: row; align-items: flex-start; text-align: left; padding: 1rem 0; }
  .process-step-num { margin-bottom: 0; margin-right: 1rem; flex-shrink: 0; }
  .related-sub-grid { grid-template-columns: repeat(2, 1fr); }
  .sitemap-layout { grid-template-columns: repeat(2, 1fr); }
}

/* ─── 반응형: 세부 서비스 (768px 이하) ─── */
@media (max-width: 768px) {
  .sub-text-hero { padding: 3rem 1.25rem 2.5rem; }
  .sub-hero-actions { flex-direction: column; gap: 0.75rem; }
  .sub-hero-actions .btn { width: 100%; text-align: center; }

  .symptom-cards { grid-template-columns: 1fr; }
  .cause-item { flex-direction: column; gap: 0.75rem; padding: 1.25rem; }
  .cause-num { font-size: 1.75rem; min-width: auto; }

  .solution-box { padding: 1.5rem; }

  .process-timeline { grid-template-columns: 1fr; gap: 1rem; }
  .process-step { flex-direction: row; align-items: flex-start; text-align: left; padding: 0; }
  .process-step-num { width: 2.75rem; height: 2.75rem; font-size: 1rem; margin-right: 1rem; margin-bottom: 0; flex-shrink: 0; }

  .related-sub-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .sitemap-layout { grid-template-columns: 1fr; gap: 2rem; }
}

/* ─── 반응형: 세부 서비스 (480px 이하) ─── */
@media (max-width: 480px) {
  .related-sub-grid { grid-template-columns: 1fr; }
  .symptom-cards { gap: 1rem; }
}