/* =====================================================
   SHINWOO — Detail Page Stylesheet
   ===================================================== */

/* 폰트는 각 HTML <head>에서 <link> 태그로 로드 (중복 @import 제거) */

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

:root {
  --navy:       #0B1C3D;
  --navy-mid:   #142952;
  --navy-light: #1E3A6E;
  --accent:     #1B4FBF;
  --accent-lt:  #2E66D8;
  --gold:       #C9A84C;
  --white:      #FFFFFF;
  --off-white:  #F7F8FA;
  --gray-100:   #F2F4F7;
  --gray-200:   #E8ECF2;
  --gray-400:   #9AA3B5;
  --gray-600:   #5A6478;
  --gray-300:   #D1D8E5;
  --gray-800:   #2C3347;
  --text:       #1A2236;

  --font-sans:  'Inter', 'Noto Sans KR', sans-serif;
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --shadow-sm:  0 2px 12px rgba(11,28,61,.06);
  --shadow-md:  0 6px 28px rgba(11,28,61,.10);
  --shadow-lg:  0 16px 56px rgba(11,28,61,.16);
  --max-w:      1280px;
  --header-h:   100px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ── Header (shared) ── */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: box-shadow .3s ease, background .3s ease;
}
.header.scrolled {
  background: rgba(255,255,255,.99);
  box-shadow: 0 4px 24px rgba(11,28,61,.12);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto; height: 100%;
  padding: 0 40px; display: flex; align-items: center; gap: 48px;
}
.logo { display: flex; align-items: center; flex-shrink: 0; text-decoration: none; padding-left: 0; margin-right: auto; }
.logo img, .logo-img { height: 42px; width: auto; max-width: 220px; display: block; object-fit: contain; object-position: left center; }
.logo-mark {
  width: 38px; height: 38px; background: var(--navy); color: var(--white);
  font-family: 'Inter', sans-serif; font-weight: 700; font-size: 13px;
  letter-spacing: .06em; display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
}
.logo-mark.small { width: 30px; height: 30px; font-size: 11px; border-radius: 6px; }
.logo-text {
  font-family: 'Inter', sans-serif; font-weight: 700; font-size: 18px;
  letter-spacing: .04em; color: var(--navy);
  display: flex; flex-direction: column; line-height: 1.1;
}
.logo-text em { font-style: normal; font-size: 10px; letter-spacing: .14em; color: var(--gray-400); font-weight: 500; }
.nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 36px; }
.nav-has-drop { position: relative; }
.nav-link {
  font-size: 16px; font-weight: 600; color: var(--gray-600); letter-spacing: .06em;
  padding: 4px 0; position: relative; transition: color var(--transition);
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px; background: var(--accent); transition: width var(--transition);
}
.nav-link:hover { color: var(--navy); }
.nav-link:hover::after { width: 100%; }
.nav-drop {
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%) translateY(-6px); background: var(--white);
  border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg); padding: 8px 0; min-width: 220px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
/* JS로 제어 — drop-open 클래스 방식 */
.nav-has-drop.drop-open .nav-drop { opacity: 1; pointer-events: auto; transform: translateX(-50%) translateY(0); }
/* 상위·하위 메뉴 사이 gap 브리지 (투명 영역) */
.nav-drop::before {
  content: ''; position: absolute;
  top: -12px; left: 0;
  width: 100%; height: 12px;
}
.nav-drop li a { display: block; padding: 10px 20px; font-size: 13.5px; color: var(--gray-600); font-weight: 500; transition: background var(--transition), color var(--transition); }
.nav-drop li a:hover { background: var(--off-white); color: var(--navy); }
.header-cta {
  margin-left: 24px; padding: 10px 24px; background: var(--navy); color: var(--white);
  font-size: 13.5px; font-weight: 600; letter-spacing: .04em; border-radius: 40px;
  transition: background var(--transition), transform var(--transition);
}
.header-cta:hover { background: var(--accent); transform: translateY(-1px); }
.hamburger { display: none; }

/* ── Back Button — 화면 우측 하단 고정 ── */
.back-btn {
  position: fixed;
  bottom: 40px;
  right: 44px;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  background: transparent;
  border: 1.5px solid #ffffff;
  border-radius: 50%;
  color: #ffffff;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
  cursor: pointer;
}
.back-btn svg {
  width: 20px; height: 20px;
  flex-shrink: 0;
  stroke: #ffffff;
  transition: transform var(--transition);
}
.back-btn:hover {
  background: rgba(255,255,255,.15);
}
.back-btn:hover svg { transform: translateX(3px); }

@media (max-width: 768px) {
  .back-btn { bottom: 24px; right: 20px; width: 42px; height: 42px; }
}

/* ── Page Hero ── */
.page-hero {
  padding-top: var(--header-h);
  position: relative;
  overflow: visible;
  background-color: var(--navy);
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

/* 배경 이미지 오버레이: 어두운 그라디언트로 텍스트 가독성 확보 */
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  /* 왼쪽은 더 어둡게(텍스트 영역), 오른쪽은 살짝 투명하게(비주얼 영역) */
  background: linear-gradient(
    105deg,
    rgba(8, 18, 40, 0.82) 0%,
    rgba(8, 18, 40, 0.70) 45%,
    rgba(8, 18, 40, 0.50) 100%
  );
  z-index: 0;
}
.page-hero > * { position: relative; z-index: 1; }

/* ── 히어로 우측 하단 뒤로가기 화살표 ── */
.hero-back-arrow {
  position: absolute;
  bottom: 32px;
  right: 40px;
  z-index: 20;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}
.hero-back-arrow:hover {
  background: rgba(255,255,255,0.25);
  border-color: #ffffff;
  transform: translateX(3px);
}
.hero-back-arrow svg { display: block; }

/* 각 사업영역별 배경 이미지 */
.hero-bg-scs        { background-image: url('../images/hero-scs-datacenter.jpg'); }
.hero-bg-cctv       { background-image: url('../images/hero-ai-cctv.jpg'); }
.hero-bg-building   { background-image: url('../images/hero-smart-building.jpg'); }
.hero-bg-construction { background-image: url('../images/hero-construction.jpg'); }
.page-hero-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 96px 40px 96px;  /* 뒤로가기 버튼 높이만큼 상단 여백 추가 */
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.page-hero-breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 12.5px; color: var(--gray-400); font-weight: 500;
  margin-bottom: 20px;
}
.page-hero-breadcrumb a { color: rgba(255,255,255,0.6); transition: color var(--transition); }
.page-hero-breadcrumb a:hover { color: #fff; }
.page-hero-breadcrumb .sep { color: rgba(255,255,255,0.3); }
.page-hero-label {
  font-family: 'Inter', sans-serif;
  font-size: 11.5px; font-weight: 700;
  letter-spacing: .22em; text-transform: uppercase;
  margin-bottom: 16px;
  color: rgba(255,255,255,0.65);
}
.page-hero-title {
  font-family: 'Noto Sans KR', sans-serif;
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700; line-height: 1.2;
  color: #fff; letter-spacing: -.02em;
  margin-bottom: 20px;
  text-shadow: 0 2px 16px rgba(0,0,0,0.3);
}
.page-hero-desc {
  font-size: 16px; line-height: 1.8;
  color: rgba(255,255,255,0.82); margin-bottom: 36px;
  max-width: 480px;
}
.page-hero-chips {
  display: flex; flex-wrap: wrap; gap: 10px;
}
.chip {
  padding: 7px 16px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  font-size: 13px; font-weight: 600;
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(4px);
}

/* Hero right visual */
.page-hero-visual {
  display: flex; justify-content: center; align-items: center;
}
.hero-visual-block {
  width: 100%; max-width: 460px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.18);
  box-shadow: 0 8px 40px rgba(0,0,0,0.40), 0 1px 0 rgba(255,255,255,0.1) inset;
  backdrop-filter: blur(16px);
  background: rgba(10, 20, 48, 0.55);
}
.hero-visual-header {
  padding: 16px 20px;
  display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.05);
}
.dot-r { width: 10px; height: 10px; border-radius: 50%; background: #FF5F57; }
.dot-y { width: 10px; height: 10px; border-radius: 50%; background: #FEBC2E; }
.dot-g { width: 10px; height: 10px; border-radius: 50%; background: #28C840; }
.hero-visual-title { font-size: 12px; font-weight: 600; color: rgba(255,255,255,0.55); margin-left: 8px; letter-spacing: .06em; }
.hero-visual-body { padding: 32px; background: transparent; min-height: 260px; }

/* ── Divider ── */
.page-divider { height: 1px; background: var(--gray-200); }

/* ── Section helpers ── */
.sec { padding: 100px 0; }
.sec-white { background: var(--white); }
.sec-off { background: var(--off-white); }
.sec-navy { background: var(--navy); }

.sec-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 40px;
}
.sec-label {
  font-family: 'Inter', sans-serif;
  font-size: 11.5px; font-weight: 700;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
.sec-label.light { color: rgba(255,255,255,.5); }
.sec-title {
  font-family: 'Noto Sans KR', sans-serif;
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 700; line-height: 1.25;
  color: var(--navy); letter-spacing: -.02em;
  margin-bottom: 16px;
}
.sec-title.light { color: var(--white); }
.sec-sub { font-size: 16px; line-height: 1.75; color: var(--gray-600); max-width: 580px; }

/* ── Service Grid ── */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 52px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.service-card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.service-card-icon svg { width: 24px; height: 24px; }
.service-card h4 { font-size: 17px; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.service-card p { font-size: 14px; line-height: 1.7; color: var(--gray-600); }

/* ── System Diagram Area ── */
.diagram-section { padding: 100px 0; }
.diagram-section .sec-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  align-items: start;
}
.diagram-text { padding-top: 8px; }
.diagram-text .sec-title { margin-bottom: 16px; }
.diagram-body { font-size: 15px; line-height: 1.85; color: var(--gray-600); margin-bottom: 28px; }
.diagram-feature-list { display: flex; flex-direction: column; gap: 12px; }
.diagram-feature {
  display: flex; align-items: center; gap: 12px;
  font-size: 14.5px; color: var(--gray-600);
}
.diagram-feature-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}

/* Diagram canvas placeholder */
.diagram-canvas {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  min-height: 440px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.diagram-canvas-header {
  padding: 20px 28px;
  border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; justify-content: space-between;
}
.diagram-canvas-header .dtitle {
  font-size: 13.5px; font-weight: 700; color: var(--navy); letter-spacing: .04em;
}
.diagram-canvas-header .dbadge {
  padding: 4px 12px; border-radius: 20px;
  background: var(--off-white); font-size: 11.5px; font-weight: 600; color: var(--gray-400);
}
.diagram-canvas-body {
  flex: 1;
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--off-white);
  position: relative;
  min-height: 360px;
}
/* Diagram node system */
.d-flow {
  display: flex; align-items: center; gap: 16px;
  flex-wrap: wrap; justify-content: center; width: 100%;
}
.d-node {
  display: flex; flex-direction: column;
  align-items: center; gap: 10px;
  cursor: default;
}
.d-node-box {
  width: 96px; height: 80px;
  border-radius: var(--radius-md);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 6px;
  font-size: 12.5px; font-weight: 700;
  color: var(--white); letter-spacing: .02em;
  text-align: center; padding: 8px;
  border: 2px solid transparent;
  box-shadow: 0 4px 16px rgba(0,0,0,.1);
  transition: transform .25s ease, box-shadow .25s ease;
}
.d-node-box:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.d-node-box svg { width: 20px; height: 20px; opacity: .9; }
.d-node-label { font-size: 11px; font-weight: 600; color: var(--gray-400); letter-spacing: .04em; text-align: center; }
.d-arrow {
  color: var(--gray-300); font-size: 22px; line-height: 1;
  flex-shrink: 0; display: flex; align-items: center;
}
.d-arrow svg { width: 20px; height: 20px; color: var(--gray-400); }

/* ══════════════════════════════════════════════
   통합 인프라 구성도 — 새 4단계 스텝 레이아웃
   ══════════════════════════════════════════════ */

/* 섹션 배경 재정의 (navy 배경 위에 올라옴) */
.diagram-section.sec-navy { background: var(--navy); }
.diagram-section.sec-navy .sec-inner {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* 섹션 헤더 */
.diag-header {
  text-align: center;
  margin-bottom: 64px;
}
.diag-header .sec-title {
  color: var(--white);
  margin-bottom: 16px;
}
.diag-intro {
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(255,255,255,.55);
  letter-spacing: .01em;
}

/* 4단계 스텝 컨테이너 — 가로 나열 */
.diag-steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: start;
  gap: 0;
}

/* 연결 화살표 */
.diag-connector {
  display: flex;
  align-items: flex-start;
  padding-top: 56px;        /* 스텝 헤더 높이에 맞춤 */
  opacity: .4;
}

/* 개별 스텝 카드 */
.diag-step {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* 스텝 헤더: 번호 + 수직 선 */
.diag-step-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  margin-bottom: 20px;
}
.diag-step-num {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--sc, #1B4FBF);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 20px;
  padding: 4px 14px;
  margin-bottom: 12px;
}
.diag-step-line {
  width: 2px;
  height: 32px;
  background: var(--lc, rgba(255,255,255,.15));
  margin-left: 22px;
  border-radius: 2px;
}

/* 스텝 바디 */
.diag-step-body {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 16px;
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background .25s, border-color .25s, transform .25s;
}
.diag-step-body:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.18);
  transform: translateY(-4px);
}

/* 아이콘 박스 */
.diag-step-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  flex-shrink: 0;
}

/* 스텝 라벨 (영문 소분류) */
.diag-step-tag {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

/* 스텝 제목 */
.diag-step-title {
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

/* 스텝 설명 */
.diag-step-desc {
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(255,255,255,.5);
}

/* 키워드 태그 */
.diag-step-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}
.diag-step-tags li {
  font-size: 11.5px;
  font-weight: 600;
  color: rgba(255,255,255,.45);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 20px;
  padding: 3px 10px;
  letter-spacing: .02em;
}

/* ── 해시태그 (구성도 스텝 하단) ── */
.diag-hashtags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,.08);
}
.diag-hashtags span {
  font-family: 'Inter', sans-serif;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .06em;
  color: rgba(255,255,255,.28);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 20px;
  padding: 3px 10px;
  transition: color .25s, border-color .25s;
}
.diag-step:hover .diag-hashtags span {
  color: rgba(255,255,255,.55);
  border-color: rgba(255,255,255,.18);
}

/* ── 3열 전용 레이아웃 (diag-steps--3col) ── */
.diag-steps--3col {
  grid-template-columns: 1fr auto 1fr auto 1fr;
}

/* ── 4공종 배지 바 (digital.html 하단) ── */
.diag-trade-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 52px;
  padding: 20px 40px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(200,212,232,.12);
  border-radius: 12px;
}
.diag-trade-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 40px;
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: rgba(200,214,232,.7);
  letter-spacing: .04em;
}
.diag-trade-divider {
  width: 1px;
  height: 28px;
  background: rgba(200,214,232,.15);
  flex-shrink: 0;
}
@media (max-width: 768px) {
  .diag-trade-bar { flex-wrap: wrap; gap: 16px; padding: 20px 24px; }
  .diag-trade-item { padding: 0 16px; }
  .diag-trade-divider { display: none; }
}

/* ── 반응형: 4열(기본) → 2열(태블릿) → 1열(모바일) ── */
@media (max-width: 1100px) {
  /* 4단계(energy) */
  .diag-steps:not(.diag-steps--3col) {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto auto;
    gap: 0 24px;
  }
  .diag-steps:not(.diag-steps--3col) .diag-connector:nth-child(2),
  .diag-steps:not(.diag-steps--3col) .diag-connector:nth-child(4),
  .diag-steps:not(.diag-steps--3col) .diag-connector:nth-child(6) {
    display: none;
  }
  .diag-steps:not(.diag-steps--3col) .diag-step:nth-child(1) { grid-column: 1; grid-row: 1; }
  .diag-steps:not(.diag-steps--3col) .diag-step:nth-child(3) { grid-column: 2; grid-row: 1; }
  .diag-steps:not(.diag-steps--3col) .diag-step:nth-child(5) { grid-column: 1; grid-row: 2; margin-top: 28px; }
  .diag-steps:not(.diag-steps--3col) .diag-step:nth-child(7) { grid-column: 2; grid-row: 2; margin-top: 28px; }

  /* 3단계(plant) */
  .diag-steps--3col {
    grid-template-columns: 1fr 1fr;
    gap: 0 24px;
  }
  .diag-steps--3col .diag-connector {
    display: none;
  }
  .diag-steps--3col .diag-step:nth-child(1) { grid-column: 1; grid-row: 1; }
  .diag-steps--3col .diag-step:nth-child(3) { grid-column: 2; grid-row: 1; }
  .diag-steps--3col .diag-step:nth-child(5) { grid-column: 1; grid-row: 2; margin-top: 28px; }
}
@media (max-width: 640px) {
  .diag-steps,
  .diag-steps--3col {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .diag-step:nth-child(n) {
    grid-column: 1 !important;
    grid-row: auto !important;
    margin-top: 0 !important;
  }
  .diag-connector { display: none; }
  .diag-header { margin-bottom: 40px; }
}

/* ── Specs / Table ── */
.spec-table-wrap {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 52px;
}
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th {
  background: var(--navy); color: var(--white);
  padding: 16px 24px; font-size: 13px; font-weight: 600;
  text-align: left; letter-spacing: .06em;
}
.spec-table td {
  padding: 18px 24px; font-size: 14.5px; color: var(--gray-600);
  border-bottom: 1px solid var(--gray-100); vertical-align: top;
}
.spec-table tr:last-child td { border-bottom: none; }
.spec-table tr:nth-child(even) td { background: var(--off-white); }
.spec-table td:first-child { font-weight: 600; color: var(--navy); width: 28%; }

/* ── Metrics band ── */
.metrics-band {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--gray-200);
  border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  overflow: hidden; margin-top: 52px;
}
.metric-cell {
  background: var(--white); padding: 36px 28px; text-align: center;
  transition: background var(--transition);
}
.metric-cell:hover { background: var(--off-white); }
.metric-val {
  font-family: 'Inter', sans-serif;
  font-size: 38px; font-weight: 800; color: var(--navy); line-height: 1;
  margin-bottom: 8px;
}
.metric-val sup { font-size: 18px; color: var(--accent); }
.metric-label { font-size: 13px; color: var(--gray-400); font-weight: 500; }

/* ── Case Study / Project Cards ── */
.project-cards {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; margin-top: 52px;
}
.proj-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.proj-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.proj-card-img {
  height: 160px; display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 800; letter-spacing: .06em; color: rgba(255,255,255,.3);
}
.proj-card-body { padding: 24px; }
.proj-card-category {
  font-size: 11px; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 8px;
}
.proj-card h4 { font-size: 16px; font-weight: 700; color: var(--navy); margin-bottom: 8px; line-height: 1.4; }
.proj-card p { font-size: 13.5px; color: var(--gray-400); line-height: 1.6; }

/* ══════════════════════════════════════════════
   주요 수행 프로젝트 — 4대 카테고리 레이아웃
   ══════════════════════════════════════════════ */

.proj-section .sec-sub { margin-bottom: 56px; }

/* 카테고리 블록 */
.proj-cat {
  margin-bottom: 56px;
}

/* 카테고리 라벨 헤더 */
.proj-cat-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--gray-200);
}
.proj-cat-num {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .16em;
  color: var(--accent);
  background: rgba(27,79,191,.08);
  border: 1px solid rgba(27,79,191,.2);
  border-radius: 20px;
  padding: 3px 12px;
}
.proj-cat-title {
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .02em;
}
.proj-cat-badge {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  border-radius: 20px;
  padding: 3px 12px;
}
.proj-cat-badge.core {
  color: #fff;
  background: linear-gradient(90deg, #1B4FBF, #2E66D8);
}

/* ── 삼성전자 HERO 카드 ── */
.proj-hero-card {
  position: relative;
  background: linear-gradient(135deg, #0B1C3D 0%, #142952 60%, #1E3A6E 100%);
  border: 1px solid rgba(74,123,255,.3);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 16px;
  box-shadow: 0 8px 40px rgba(11,28,61,.25);
  transition: box-shadow .3s, transform .3s;
}
.proj-hero-card:hover {
  box-shadow: 0 16px 60px rgba(11,28,61,.38);
  transform: translateY(-3px);
}

/* 좌측 강조 라인 */
.proj-hero-accent {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, #4A7BFF 0%, #2DCEA8 100%);
  border-radius: 4px 0 0 4px;
}

.proj-hero-content {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  padding: 44px 44px 44px 52px;
  align-items: center;
}

/* 왼쪽: 텍스트 영역 */
.proj-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #4A7BFF;
  background: rgba(74,123,255,.12);
  border: 1px solid rgba(74,123,255,.25);
  border-radius: 20px;
  padding: 5px 14px;
  margin-bottom: 20px;
}
.proj-hero-title {
  font-family: 'Noto Sans KR', sans-serif;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  line-height: 1.35;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -.01em;
}
.proj-hero-desc {
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(255,255,255,.6);
  margin-bottom: 24px;
}
.proj-hero-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.proj-hero-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.75);
  line-height: 1.5;
}
.proj-hero-list li svg { flex-shrink: 0; margin-top: 2px; }

/* 오른쪽: 통계 그리드 */
.proj-hero-right {
  display: flex;
  align-items: center;
  justify-content: center;
}
.proj-hero-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
}
.proj-hero-stat {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 14px;
  padding: 20px 16px;
  text-align: center;
  transition: background .2s;
}
.proj-hero-stat:hover { background: rgba(255,255,255,.09); }
.proj-hero-stat-val {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -.02em;
}
.proj-hero-stat-val em {
  font-style: normal;
  font-size: 18px;
  font-weight: 700;
  color: #4A7BFF;
}
.proj-hero-stat-val sup {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,.5);
  vertical-align: super;
}
.proj-hero-stat-label {
  display: block;
  font-size: 11px;
  color: rgba(255,255,255,.4);
  line-height: 1.5;
  font-weight: 500;
}

/* ── 서브 카드 행 (2열) ── */
.proj-sub-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.proj-sub-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  padding: 24px;
  transition: box-shadow .25s, transform .25s, border-color .25s;
}
.proj-sub-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,.08);
  transform: translateY(-3px);
  border-color: var(--gray-300);
}
.proj-sub-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 1px solid;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.proj-sub-body { flex: 1; min-width: 0; }
.proj-sub-cat {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.proj-sub-body h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.4;
  margin-bottom: 6px;
}
.proj-sub-body p {
  font-size: 13px;
  color: var(--gray-400);
  line-height: 1.65;
}

/* ── 반응형 ── */
@media (max-width: 960px) {
  .proj-hero-content {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 36px 36px 36px 44px;
  }
  .proj-hero-stat-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
@media (max-width: 640px) {
  .proj-sub-row { grid-template-columns: 1fr; }
  .proj-hero-stat-grid { grid-template-columns: 1fr 1fr; }
  .proj-hero-content { padding: 28px 24px 28px 32px; }
  .proj-cat-label { flex-wrap: wrap; }
}
/* ─────────────────────────────────────────
   CTA BANNER  (메인 Contact Us 스타일 통일)
───────────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, #0B1C3D 0%, #1B4FBF 55%, #0D6F9E 100%);
  position: relative;
  overflow: hidden;
  padding: 0;
}
/* 골드 글로우 (우하단) */
.cta-banner::before {
  content: '';
  position: absolute;
  bottom: -120px; right: -120px;
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(201,168,76,.18) 0%, transparent 65%);
  pointer-events: none;
}
/* 화이트 글로우 (좌상단) */
.cta-banner::after {
  content: '';
  position: absolute;
  top: -80px; left: -80px;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(255,255,255,.06) 0%, transparent 65%);
  pointer-events: none;
}

.cta-banner-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 40px;
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 72px;
  align-items: center;
  position: relative;
  z-index: 1;
}

/* 좌측 텍스트 */
.cta-text-col { display: flex; flex-direction: column; }
.cta-label {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: rgba(0,180,255,.85);
  margin-bottom: 16px;
}
.cta-title {
  font-family: 'Noto Sans KR', sans-serif;
  font-size: clamp(22px, 2.6vw, 36px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.35;
  letter-spacing: -.02em;
  margin-bottom: 14px;
}
.cta-sub {
  font-size: 15px;
  color: rgba(255,255,255,.5);
  line-height: 1.75;
  margin-bottom: 0;
}

/* 우측 폼 */
.cta-form {
  background: rgba(255,255,255,.06);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.cta-form-row { display: flex; gap: 12px; }
.cta-field { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.cta-field.full { flex: unset; width: 100%; }
.cta-field label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: rgba(255,255,255,.42);
}
.cta-field label .req { color: var(--gold); margin-left: 2px; }
.cta-input {
  height: 44px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 8px;
  padding: 0 13px;
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 13.5px;
  color: var(--white);
  outline: none;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}
.cta-input::placeholder { color: rgba(255,255,255,.22); }
.cta-input:focus {
  border-color: rgba(100,160,255,.6);
  background: rgba(255,255,255,.1);
  box-shadow: 0 0 0 3px rgba(27,79,191,.22);
}
.cta-input.cta-textarea {
  height: auto;
  min-height: 90px;
  padding: 11px 13px;
  resize: vertical;
  line-height: 1.6;
}
.cta-input:invalid:not(:placeholder-shown) { border-color: rgba(255,80,80,.5); }

/* 전송 버튼 */
.cta-submit {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  background: var(--gold);
  color: var(--navy);
  font-family: 'Noto Sans KR', sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .05em;
  border: none;
  border-radius: 40px;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}
.cta-submit:hover {
  opacity: .88;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201,168,76,.35);
}
.cta-submit:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.cta-submit-icon { transition: transform var(--transition); }
.cta-submit:hover .cta-submit-icon { transform: translateX(3px); }

/* 결과 메시지 */
.cta-success {
  font-size: 13px;
  color: #5DD98A;
  background: rgba(26,115,64,.18);
  border: 1px solid rgba(26,115,64,.3);
  border-radius: 8px;
  padding: 11px 14px;
}
.cta-error {
  font-size: 13px;
  color: #FF8A8A;
  background: rgba(191,27,27,.15);
  border: 1px solid rgba(191,27,27,.28);
  border-radius: 8px;
  padding: 11px 14px;
}
.cta-error a { color: var(--gold); }

/* 기업 연락처 정보 */
.cta-contact-info {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,.1);
}
.cta-contact-item {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: rgba(255,255,255,.5);
}
.cta-contact-item svg { flex-shrink: 0; opacity: .65; }
.cta-contact-item a { color: rgba(255,255,255,.6); text-decoration: none; transition: color var(--transition); }
.cta-contact-item a:hover { color: var(--white); }

/* 반응형 */
@media (max-width: 1024px) {
  .cta-banner-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 64px 40px;
  }
}
@media (max-width: 768px) {
  .cta-banner-inner { padding: 56px 20px; gap: 36px; }
  .cta-form { padding: 24px 18px; }
  .cta-form-row { flex-direction: column; gap: 0; }
  .cta-submit { width: 100%; justify-content: center; }
  .cta-title { font-size: clamp(20px, 5.5vw, 28px); }
}
@media (max-width: 640px) {
  .cta-banner-inner { padding: 48px 16px; }
  .cta-form { padding: 20px 14px; border-radius: 12px; }
}

/* ── Footer ── */
.footer { background: var(--gray-800); }
.footer-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 64px 40px 40px;
  display: grid; grid-template-columns: 1.2fr 2fr; gap: 80px;
}
.footer-brand .footer-logo { display: block; margin-bottom: 16px; }
.footer-logo-img { height: 36px; width: auto; display: block; object-fit: contain; }
.footer-brand p { font-size: 13.5px; color: rgba(255,255,255,.35); line-height: 1.6; }
.footer-brand .logo-text { color: var(--white); }
.footer-brand .logo-text em { color: rgba(255,255,255,.3); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col strong { font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: rgba(255,255,255,.5); margin-bottom: 6px; }
.footer-col a { font-size: 14px; color: rgba(255,255,255,.35); transition: color var(--transition); }
.footer-col a.footer-address { font-size: 11px; white-space: normal; word-break: keep-all; overflow-wrap: break-word; }
.footer-col a:hover { color: rgba(255,255,255,.75); }
.footer-bottom { max-width: var(--max-w); margin: 0 auto; padding: 20px 40px 24px; border-top: 1px solid rgba(255,255,255,.07); }
.footer-bottom p { font-size: 12.5px; color: rgba(255,255,255,.2); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .diagram-section .sec-inner { grid-template-columns: 1fr; gap: 48px; }
  .page-hero-inner { grid-template-columns: 1fr; }
  .page-hero-visual { display: none; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-band { grid-template-columns: repeat(2, 1fr); }
  .project-cards { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .spec-table-wrap { overflow-x: auto; }
  .proj-hero-content { grid-template-columns: 1fr; gap: 28px; }
  .proj-hero-stat-grid { grid-template-columns: repeat(4, 1fr); }
  .proj-sub-row { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --header-h: 60px; }
  .header-inner { padding: 0 20px; gap: 16px; }
  .nav, .header-cta { display: none; }
  .hamburger { display: flex; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; margin-left: auto; padding: 4px; }
  .hamburger span { width: 24px; height: 2px; background: var(--navy); border-radius: 2px; display: block; transition: transform .25s, opacity .25s; }
  /* 햄버거 active 상태 X 변환 */
  .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger.active span:nth-child(2) { opacity: 0; }
  .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* 모바일 네비 드롭다운 */
  .nav.open {
    display: flex !important;
    flex-direction: column;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(16px);
    padding: 16px 0 24px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 8px 32px rgba(11,28,61,.12);
    z-index: 999;
    animation: navSlideDown .2s ease;
  }
  @keyframes navSlideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  .nav.open .nav-list {
    flex-direction: column;
    gap: 0;
    align-items: stretch;
    padding: 0 20px;
  }
  .nav.open .nav-link {
    display: block;
    padding: 13px 0;
    font-size: 15px;
    font-weight: 600;
    border-bottom: 1px solid var(--gray-100);
    color: var(--navy);
  }
  .nav.open .nav-has-drop .nav-drop {
    display: flex !important;
    position: static;
    box-shadow: none;
    border: none;
    background: var(--off-white);
    border-radius: 8px;
    padding: 8px 0;
    margin: 6px 0 10px;
    min-width: unset;
  }
  .nav.open .nav-drop li a {
    padding: 9px 16px;
    font-size: 14px;
    color: var(--gray-600);
  }

  .sec-inner, .cta-banner-inner { padding: 0 20px; }
  .sec { padding: 64px 0; }
  .service-grid { grid-template-columns: 1fr; gap: 16px; }
  .service-card { padding: 24px 20px; }
  .service-card h4 { font-size: 15.5px; }
  .metrics-band { grid-template-columns: 1fr 1fr; }
  .metric-cell { padding: 28px 16px; }
  .metric-val { font-size: 30px; }
  .project-cards { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .d-flow { gap: 10px; }
  .d-node-box { width: 80px; height: 68px; font-size: 11px; }

  /* Hero Section 모바일 대응 */
  .page-hero { background-position: center top; }
  .page-hero::before {
    background: linear-gradient(180deg,
      rgba(8,18,40,.88) 0%,
      rgba(8,18,40,.80) 100%
    );
  }
  .page-hero-inner {
    grid-template-columns: 1fr;
    padding: 72px 20px 56px;
    gap: 32px;
  }
  .page-hero-visual { display: none; }
  .page-hero-title { font-size: clamp(26px, 7vw, 40px); }
  .page-hero-desc { font-size: 14.5px; margin-bottom: 24px; }
  .page-hero-chips { gap: 8px; }
  .chip { font-size: 12px; padding: 6px 13px; }

  /* 섹션 타이틀 */
  .sec-title { font-size: clamp(22px, 5.5vw, 32px); }
  .sec-sub { font-size: 14.5px; }

  /* 프로젝트 카드 */
  .proj-hero-content {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 28px 20px;
  }
  .proj-hero-stat-grid { grid-template-columns: 1fr 1fr; }
  .proj-hero-stat-val { font-size: 22px; }
  .proj-sub-row { grid-template-columns: 1fr; }
  .proj-cat-label { flex-wrap: wrap; gap: 8px; }

  /* 스펙 테이블 */
  .spec-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .spec-table th, .spec-table td { padding: 14px 16px; font-size: 13px; }
}

@media (max-width: 640px) {
  .sec { padding: 56px 0; }
  .sec-inner { padding: 0 16px; }
  .page-hero-inner { padding: 64px 16px 48px; }

  /* 서비스 카드 */
  .service-card { padding: 20px 16px; }
  .service-card h4 { font-size: 15px; }
  .service-card p { font-size: 13px; }

  /* 매트릭스 밴드 */
  .metrics-band { grid-template-columns: 1fr 1fr; }
  .metric-val { font-size: 26px; }
  .metric-val sup { font-size: 14px; }
  .metric-label { font-size: 12px; }

  /* 프로젝트 카드 */
  .proj-hero-stat-grid { grid-template-columns: 1fr 1fr; }
  .proj-hero-stat { padding: 14px 10px; }
  .proj-hero-stat-val { font-size: 20px; }
  .proj-cat-title { font-size: 15px; }
  .proj-sub-card { padding: 18px 14px; gap: 12px; }
  .proj-sub-icon { width: 40px; height: 40px; border-radius: 10px; }
  .proj-sub-body h4 { font-size: 14px; }
  .proj-sub-body p { font-size: 12.5px; }

  /* 푸터 */
  .footer-inner { padding: 40px 16px 28px; }
  .footer-links { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { padding: 14px 16px 18px; }
  .footer-bottom p { font-size: 11.5px; }

  /* CTA 배너 */
  .cta-banner-inner { padding: 48px 16px; }
  .cta-form { padding: 20px 14px; border-radius: 12px; }
  .cta-title { font-size: clamp(20px, 6vw, 26px); }
  .cta-submit { width: 100%; justify-content: center; }

  /* Hero Section */
  .page-hero-title { font-size: clamp(24px, 8vw, 36px); }
  .page-hero-desc { font-size: 14px; }

  /* 다이어그램 */
  .diag-header .sec-title { font-size: clamp(20px, 6vw, 28px); }
  .diag-intro { font-size: 13.5px; }
  .diag-step-title { font-size: 14.5px; }
  .diag-step-desc { font-size: 12.5px; }
  .diag-step-body { padding: 22px 18px 20px; }

  /* 스펙 테이블 */
  .spec-table th { font-size: 12px; padding: 12px 14px; }
  .spec-table td { font-size: 13px; padding: 12px 14px; }

  /* 헤더 CTA */
  .hero-back-arrow { bottom: 20px; right: 16px; width: 42px; height: 42px; }
  .back-btn { bottom: 20px; right: 16px; width: 42px; height: 42px; }
}
