/* ═══════════════════════════════════════════════════════════
   든든 | 사각싱크볼 설치 업체 — 디자인 시스템
   Hero 타입: hero-split / 섹션순서: 패턴B(서비스 우선형)
   그리드: grid-3 / 레이블: label-number / 버튼: btn-square
   Primary 컬러: 파스텔 스틸블루 #A0C4D8 (10종 중 랜덤 선정)
   ═══════════════════════════════════════════════════════════ */

@font-face {
  font-family: "Pretendard";
  src: url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/woff2/PretendardVariable.woff2") format("woff2-variations");
  font-weight: 45 920;
  font-display: swap;
}

:root {
  --primary: #A0C4D8;
  --primary-dark: #7FA8C0;
  --text: #1D2327;
  --text-muted: #667080;
  --bg: #FFFFFF;
  --bg-alt: #F5F8FA;
  --border: #E3E8EC;
  --card-radius: 1.25rem;
  --btn-radius: 6px;
  --max-width: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  font-family: "Pretendard", "Noto Sans KR", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-weight: 400;
  color: var(--text);
  background: var(--bg);
  word-break: keep-all;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 800; line-height: 1.35; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-head { margin-bottom: 2.75rem; max-width: 640px; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.1rem); margin-top: 0.6rem; }
.section-desc { color: var(--text-muted); font-weight: 300; margin-top: 0.75rem; font-size: 1rem; }

/* ── 섹션 레이블: label-number ── */
.section-label {
  display: flex; align-items: baseline; gap: 0.6rem;
  font-size: 0.75rem; font-weight: 700; color: var(--primary-dark);
  text-transform: uppercase; letter-spacing: 0.08em;
}
.section-label::after { content: ""; flex: 1; height: 1px; background: var(--border); margin-left: 0.5rem; }

/* ── 버튼: btn-square ── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  border-radius: var(--btn-radius); padding: 0.85rem 1.85rem; font-weight: 700; font-size: 0.95rem;
  border: none; transition: all 0.25s ease; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #14313F; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary-dark); }
.btn-ghost { background: rgba(255,255,255,0.16); color: #fff; border: 1.5px solid rgba(255,255,255,0.55); backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255,255,255,0.28); }
.btn-row { display: flex; gap: 0.85rem; flex-wrap: wrap; }
.link-more { font-size: 0.875rem; font-weight: 600; color: var(--text-muted); transition: color 0.25s ease; }
.link-more:hover { color: var(--primary-dark); }

/* ── Header ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.82); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 0.55rem; font-weight: 800; font-size: 1.2rem; color: var(--text); }
.logo-mark { width: 34px; height: 34px; border-radius: 9px; background: var(--primary); display: flex; align-items: center; justify-content: center; color: #14313F; font-weight: 800; font-size: 0.95rem; flex-shrink: 0; }
.nav-desktop { display: flex; align-items: center; gap: 2.1rem; }
.nav-desktop a { font-size: 0.95rem; font-weight: 600; color: var(--text); transition: color 0.2s ease; }
.nav-desktop a:hover { color: var(--primary-dark); }
.header-cta { display: flex; align-items: center; gap: 1rem; }
.header-tel { font-weight: 700; font-size: 0.95rem; display: flex; align-items: center; gap: 0.4rem; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 0.4rem; }
.hamburger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; }
.mobile-menu { display: none; flex-direction: column; padding: 1rem 1.25rem 1.5rem; border-top: 1px solid var(--border); background: #fff; }
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 0.75rem 0; font-weight: 600; border-bottom: 1px solid var(--border); }

@media (max-width: 768px) {
  .nav-desktop, .header-tel-text { display: none; }
  .hamburger { display: flex; }
}

/* ── Hero (hero-split) ── */
.hero { padding: 3.5rem 0 4.5rem; background: var(--bg-alt); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 3.5rem; align-items: center; }
.hero-label { font-size: 0.8rem; font-weight: 700; color: var(--primary-dark); letter-spacing: 0.1em; text-transform: uppercase; }
.hero h1 { font-size: clamp(2rem, 4vw, 2.85rem); margin-top: 0.9rem; letter-spacing: -0.01em; }
.hero-desc { margin-top: 1.25rem; color: var(--text-muted); font-weight: 300; font-size: 1.05rem; max-width: 480px; }
.hero-service-list { margin-top: 1.75rem; display: flex; flex-direction: column; gap: 0.75rem; }
.hero-service-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.9rem 1.1rem; background: #fff; border: 1px solid var(--border); border-radius: 0.85rem; }
.hero-service-item .num { font-weight: 800; color: var(--primary-dark); font-size: 0.9rem; }
.hero-service-item .label { font-weight: 700; font-size: 0.92rem; }
.hero-btn-area { margin-top: 2rem; }
.hero-visual { position: relative; }
.hero-slider { position: relative; border-radius: 1.5rem; overflow: hidden; aspect-ratio: 4/3; box-shadow: 0 24px 60px rgba(20,49,63,0.18); }
.hero-slider img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.9s ease; }
.hero-slider img.active { opacity: 1; }
.hero-visual-caption { margin-top: 1.1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.hero-visual-caption .brand { font-weight: 800; }
.hero-visual-caption .desc { color: var(--text-muted); font-size: 0.85rem; font-weight: 300; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
}

/* ── 서비스 소개 ── */
.service-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; }
@media (max-width: 1024px) { .service-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .service-grid { grid-template-columns: repeat(2, 1fr); } }
.service-card { border: 1px solid var(--border); border-radius: 1rem; overflow: hidden; transition: all 0.3s ease; }
.service-card:hover { transform: translateY(-4px); box-shadow: 0 14px 32px rgba(0,0,0,0.08); border-color: var(--primary); }
.service-thumb { aspect-ratio: 3/4; overflow: hidden; }
.service-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.service-card:hover .service-thumb img { transform: scale(1.06); }
.service-body { padding: 1.1rem; display: flex; flex-direction: column; gap: 0.4rem; }
.service-eyebrow { font-size: 0.65rem; font-weight: 700; color: var(--primary-dark); letter-spacing: 0.08em; text-transform: uppercase; }
.service-name { font-size: 0.98rem; font-weight: 800; }
.service-desc { font-size: 0.82rem; color: var(--text-muted); font-weight: 300; }

/* ── 시공사례 포트폴리오 (grid-3) ── */
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 1024px) { .portfolio-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .portfolio-grid { grid-template-columns: 1fr; } }
.portfolio-card { border: 1px solid var(--border); border-radius: var(--card-radius); overflow: hidden; transition: all 0.3s ease; cursor: pointer; text-decoration: none; display: block; background: #fff; }
.portfolio-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.14); border-color: var(--primary); }
.portfolio-card .card-thumb { aspect-ratio: 4/3; overflow: hidden; }
.portfolio-card .card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.portfolio-card:hover .card-thumb img { transform: scale(1.05); }
.portfolio-card .card-body { padding: 1.25rem; display: flex; flex-direction: column; gap: 0.5rem; }
.card-badge { font-size: 0.65rem; font-weight: 700; letter-spacing: 0.08em; background: var(--primary); color: #14313F; display: inline-block; padding: 0.2rem 0.6rem; border-radius: 0.25rem; align-self: flex-start; }
.card-title { font-weight: 800; font-size: 1.05rem; line-height: 1.4; color: var(--text); }
.card-sub { font-weight: 300; font-size: 0.875rem; color: var(--text-muted); display: flex; align-items: center; gap: 0.35rem; }
.card-more { font-size: 0.875rem; font-weight: 600; color: var(--text-muted); margin-top: 0.25rem; transition: color 0.3s ease; }
.portfolio-card:hover .card-more { color: var(--primary-dark); }
.pin-icon { flex-shrink: 0; }

/* ── 회사소개 ── */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 3.5rem; align-items: center; }
.about-copy p { margin-bottom: 1rem; color: var(--text-muted); font-weight: 300; }
.about-facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 1.75rem; }
.about-fact { background: var(--bg-alt); border-radius: 1rem; padding: 1.4rem; }
.about-fact .num { font-size: 1.9rem; font-weight: 800; color: var(--primary-dark); }
.about-fact .label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.3rem; }
.about-visual img { border-radius: 1.5rem; aspect-ratio: 4/3; object-fit: cover; }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; } .about-visual { order: -1; } }

/* ── 프로세스 ── */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
@media (max-width: 900px) { .process-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .process-grid { grid-template-columns: 1fr; } }
.process-step { background: #fff; border: 1px solid var(--border); border-radius: 1.1rem; padding: 1.6rem 1.3rem; position: relative; }
.process-step .step-num { font-size: 1.6rem; font-weight: 800; color: var(--primary); }
.process-step h3 { font-size: 1.02rem; margin-top: 0.6rem; }
.process-step p { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.5rem; font-weight: 300; }

/* ── 서비스 지역 ── */
.area-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
@media (max-width: 768px) { .area-grid { grid-template-columns: 1fr; } }
.area-card { border: 1px solid var(--border); border-radius: 1.1rem; padding: 1.75rem; background: #fff; }
.area-card h3 { font-size: 1.1rem; display: flex; align-items: center; gap: 0.5rem; }
.area-card ul { margin-top: 0.9rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.area-card li { font-size: 0.82rem; color: var(--text-muted); background: var(--bg-alt); padding: 0.35rem 0.7rem; border-radius: 0.4rem; }

/* ── FAQ ── */
.faq-list { display: flex; flex-direction: column; gap: 0.75rem; max-width: 780px; }
.faq-item { border: 1px solid var(--border); border-radius: 0.9rem; overflow: hidden; background: #fff; }
.faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.25rem 1.5rem; background: none; border: none; text-align: left; font-weight: 700; font-size: 0.98rem; }
.faq-q .plus { flex-shrink: 0; transition: transform 0.3s ease; color: var(--primary-dark); }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-item.open .faq-a { max-height: 400px; }
.faq-a-inner { padding: 0 1.5rem 1.25rem; color: var(--text-muted); font-weight: 300; font-size: 0.92rem; }

/* ── CTA ── */
.cta-section { background: linear-gradient(135deg, #14313F 0%, #1D4A5F 100%); color: #fff; padding: 5rem 0; }
.cta-section .section-desc { color: rgba(255,255,255,0.7); }
.cta-title { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.cta-badges { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin: 2.25rem 0 2.5rem; }
@media (max-width: 768px) { .cta-badges { grid-template-columns: repeat(2, 1fr); } }
.cta-badge { display: flex; align-items: center; gap: 0.6rem; font-size: 0.85rem; font-weight: 600; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); border-radius: 0.7rem; padding: 0.9rem 1rem; }

/* ── Footer ── */
.site-footer { background: #F0F3F5; border-top: 1px solid var(--border); padding: 3.5rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2.5rem; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 2rem; } }
.footer-brand .logo { margin-bottom: 0.9rem; }
.footer-brand p { color: var(--text-muted); font-size: 0.88rem; font-weight: 300; max-width: 320px; }
.footer-col h4 { font-size: 0.85rem; margin-bottom: 1rem; color: var(--text-muted); }
.footer-col ul { display: flex; flex-direction: column; gap: 0.65rem; }
.footer-col a { font-size: 0.88rem; font-weight: 500; }
.footer-col a:hover { color: var(--primary-dark); }
.footer-biz { margin-top: 2.5rem; padding-top: 1.75rem; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 0.78rem; line-height: 1.9; }

/* ── Floating buttons ── */
.floating-wrap { position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 200; display: flex; flex-direction: column; gap: 0.65rem; }
.floating-btn { display: flex; align-items: center; gap: 0.5rem; padding: 0.85rem 1.1rem; border-radius: 999px; font-weight: 700; font-size: 0.85rem; box-shadow: 0 10px 28px rgba(0,0,0,0.18); }
.floating-btn.call { background: var(--primary); color: #14313F; }
.floating-btn.sms { background: #14313F; color: #fff; }

/* ── 공통: 뒤로가기, 요약바, before/after, 인용구 ── */
.back-link { display: inline-flex; align-items: center; gap: 0.4rem; font-weight: 600; font-size: 0.9rem; color: #fff; opacity: 0.9; }
.detail-hero { position: relative; padding: 7.5rem 0 3.5rem; color: #fff; background-size: cover; background-position: center; }
.detail-hero::before { content: ""; position: absolute; inset: 0; background: rgba(15,25,32,0.5); }
.detail-hero .container { position: relative; z-index: 1; }
.detail-hero h1 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin-top: 1rem; text-shadow: 0 2px 12px rgba(0,0,0,0.35); }
.detail-hero .loc { margin-top: 0.6rem; font-weight: 500; opacity: 0.92; }
.summary-bar { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--border); border-radius: 1rem; overflow: hidden; margin-top: -3.25rem; position: relative; z-index: 2; background: #fff; box-shadow: 0 18px 40px rgba(0,0,0,0.08); }
@media (max-width: 768px) { .summary-bar { grid-template-columns: repeat(2, 1fr); } }
.summary-item { padding: 1.4rem; border-right: 1px solid var(--border); }
.summary-item:last-child { border-right: none; }
.summary-item .k { font-size: 0.75rem; color: var(--text-muted); }
.summary-item .v { font-weight: 700; margin-top: 0.35rem; font-size: 0.95rem; }
.ba-grid { display: flex; flex-direction: column; gap: 2.5rem; max-width: 640px; margin: 0 auto; }
.ba-block img { border-radius: 1rem; aspect-ratio: 4/3; object-fit: cover; object-position: center 70%; margin-bottom: 1.25rem; width: 100%; }
.ba-block h2 { font-size: 1.15rem; }
.ba-block p { color: var(--text-muted); font-weight: 300; margin-top: 0.9rem; font-size: 0.92rem; }
.summary-list { display: flex; flex-direction: column; gap: 0.6rem; }
.summary-list li { display: flex; gap: 0.6rem; font-size: 0.92rem; color: var(--text-muted); }
.summary-list li strong { color: var(--text); }
.quote-block { border-left: 3px solid var(--primary); padding: 0.5rem 0 0.5rem 1.5rem; }
.quote-block p { font-size: 1.02rem; font-weight: 500; }
.quote-block .sig { margin-top: 1rem; font-size: 0.85rem; color: var(--text-muted); }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
@media (max-width: 640px) { .related-grid { grid-template-columns: 1fr; } }

/* ── NSEO 배너 ── */
.promo-banner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; background: var(--bg-alt); border-radius: 1.25rem; padding: 2.25rem 2.5rem; }
.promo-banner h2 { font-size: 1.3rem; }
.promo-banner p { color: var(--text-muted); margin-top: 0.4rem; font-size: 0.9rem; }

/* ── 상담 페이지 ── */
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
@media (max-width: 640px) { .guide-grid { grid-template-columns: 1fr; } }
.guide-card img { border-radius: 1rem; object-fit: cover; width: 100%; }
.guide-card:nth-child(1) img { aspect-ratio: 3/4; }
.guide-card:nth-child(2) img { aspect-ratio: 1/1; }
.guide-card h3 { margin-top: 1rem; font-size: 1rem; }
.guide-card p { margin-top: 0.4rem; font-size: 0.85rem; color: var(--text-muted); font-weight: 300; }
.step-row { display: flex; flex-direction: column; gap: 1rem; }
.step-item { display: flex; gap: 1.1rem; align-items: flex-start; background: #fff; border: 1px solid var(--border); border-radius: 1rem; padding: 1.4rem; }
.step-item .step-num { font-size: 1.4rem; font-weight: 800; color: var(--primary-dark); flex-shrink: 0; }
.step-item h3 { font-size: 1rem; }
.step-item p { font-size: 0.88rem; color: var(--text-muted); margin-top: 0.35rem; font-weight: 300; }

/* ── 사이트맵 페이지 ── */
.sitemap-badge { display: inline-block; background: var(--primary); color: #14313F; font-weight: 700; font-size: 0.85rem; padding: 0.5rem 1rem; border-radius: 999px; }
.sitemap-search { width: 100%; max-width: 420px; padding: 0.85rem 1.1rem; border: 1px solid var(--border); border-radius: 0.7rem; font-size: 0.95rem; font-family: inherit; }
.sitemap-cats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 2.5rem; }
@media (max-width: 900px) { .sitemap-cats { grid-template-columns: 1fr; } }
.sitemap-cat h3 { font-size: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); margin-bottom: 0.9rem; }
.sitemap-cat ul { display: flex; flex-direction: column; gap: 0.55rem; }
.sitemap-cat a { font-size: 0.9rem; color: var(--text-muted); }
.sitemap-cat a:hover { color: var(--primary-dark); }
.sitemap-cat[data-cat] { display: block; }
.sitemap-cat.hidden { display: none; }