/* =============================================
   트리트비즈 (TritBiz) — common.css
   ============================================= */

/* ── CSS 변수 ── */
:root {
  --primary:       #1a5f7a;
  --primary-dark:  #124557;
  --primary-light: #2480a0;
  --accent:        #00c4b4;
  --accent-dark:   #009e91;
  --dark:          #0b1a27;
  --dark-2:        #122333;
  --gray-1:        #f3f7fa;
  --gray-2:        #e4ecf2;
  --gray-3:        #b0c4d4;
  --gray-4:        #5d7d90;
  --text:          #1a2e3d;
  --text-sub:      #486070;
  --text-light:    #85a0b0;
  --white:         #ffffff;
  --shadow-sm:     0 2px 10px rgba(10,30,50,.08);
  --shadow-md:     0 6px 28px rgba(10,30,50,.12);
  --shadow-lg:     0 16px 52px rgba(10,30,50,.18);
  --radius:        10px;
  --radius-lg:     18px;
  --ease:          0.3s cubic-bezier(.4,0,.2,1);
  --header-h:      68px;
}

/* ── 리셋 ── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Noto Sans KR','Malgun Gothic',sans-serif;
  color:var(--text);
  background:var(--white);
  line-height:1.75;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;}
button{cursor:pointer;border:none;background:none;font-family:inherit;}

/* ── 레이아웃 ── */
.container{max-width:1200px;margin:0 auto;padding:0 40px;}
.section{padding:88px 0;}
.section-sm{padding:56px 0;}

/* ── 섹션 헤더 ── */
.section-header{text-align:center;margin-bottom:56px;}
.section-tag{
  display:inline-block;
  font-size:11px;font-weight:700;letter-spacing:2.5px;
  text-transform:uppercase;color:var(--accent);
  background:rgba(0,196,180,.1);
  padding:5px 14px;border-radius:20px;margin-bottom:12px;
}
.section-title{
  font-size:32px;font-weight:800;color:var(--text);
  line-height:1.3;margin-bottom:14px;letter-spacing:-.5px;
}
.section-title span{color:var(--primary);}
.section-desc{
  font-size:15px;color:var(--text-sub);
  max-width:560px;margin:0 auto;line-height:1.85;
}

/* ── 버튼 ── */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 26px;border-radius:var(--radius);
  font-size:14px;font-weight:600;letter-spacing:.2px;
  transition:all var(--ease);cursor:pointer;
}
.btn-primary{background:var(--primary);color:var(--white);box-shadow:0 4px 16px rgba(26,95,122,.3);}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(26,95,122,.4);}
.btn-accent{background:var(--accent);color:var(--white);box-shadow:0 4px 16px rgba(0,196,180,.3);}
.btn-accent:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,196,180,.4);}
.btn-outline{background:transparent;color:var(--white);border:2px solid rgba(255,255,255,.65);}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:var(--white);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--primary);border:2px solid var(--primary);}
.btn-ghost:hover{background:var(--primary);color:var(--white);transform:translateY(-2px);}

/* ═══════════════════════════
   HEADER
═══════════════════════════ */
#site-header{
  position:fixed;top:0;left:0;right:0;
  height:var(--header-h);z-index:1000;
  transition:background var(--ease),box-shadow var(--ease);
}
#site-header.transparent{background:transparent;}
#site-header.solid{
  background:rgba(11,26,39,.96);
  backdrop-filter:blur(12px);
  box-shadow:0 2px 24px rgba(0,0,0,.28);
}

.header-inner{
  max-width:1200px;margin:0 auto;padding:0 40px;
  height:100%;display:flex;align-items:center;justify-content:space-between;
}

/* 로고 */
.logo{display:flex;align-items:center;gap:0;}
.logo-img{
  height:120px;width:auto;
  /* 흰색으로 변경 */
  filter:brightness(0) invert(1);
  transition:opacity var(--ease);
}
.logo:hover .logo-img{opacity:.82;}

/* 푸터용 (어두운 배경) — 원본 색상 유지 */
.logo.logo-original .logo-img{
  filter:none;
  height:74px;
}

/* GNB */
.gnb{display:flex;align-items:center;gap:2px;}
.gnb>li{position:relative;}
.gnb>li>a{
  display:flex;align-items:center;gap:5px;
  padding:9px 15px;font-size:14px;font-weight:500;
  color:rgba(255,255,255,.82);border-radius:var(--radius);
  transition:all var(--ease);white-space:nowrap;
}
.gnb>li>a i.arrow{font-size:9px;transition:transform var(--ease);}
.gnb>li:hover>a,.gnb>li>a.active{color:#fff;background:rgba(255,255,255,.1);}
.gnb>li:hover>a i.arrow{transform:rotate(180deg);}

/* 드롭다운 */
.dropdown{
  position:absolute;top:calc(100% + 6px);left:0;
  background:#fff;border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);min-width:200px;
  padding:8px 0;
  opacity:0;visibility:hidden;
  transform:translateY(-10px);
  transition:all var(--ease);z-index:200;
  border:1px solid var(--gray-2);
}
.gnb>li:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0);}
.dropdown li a{
  display:flex;align-items:center;gap:9px;
  padding:10px 20px;font-size:13px;font-weight:400;
  color:var(--text-sub);transition:all var(--ease);
}
.dropdown li a i{color:var(--accent);width:14px;font-size:12px;}
.dropdown li a:hover{color:var(--primary);background:var(--gray-1);padding-left:26px;}

/* 헤더 우측 */
.header-right{display:flex;align-items:center;gap:16px;}
.header-tel{
  display:flex;align-items:center;gap:7px;
  font-size:13px;font-weight:600;color:var(--accent);
}
.header-tel i{font-size:12px;}

/* 햄버거 */
.hamburger{
  display:none;flex-direction:column;gap:5px;
  padding:7px;cursor:pointer;
}
.hamburger span{
  display:block;width:23px;height:2px;
  background:#fff;border-radius:2px;transition:all var(--ease);
}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;transform:scaleX(0);}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 모바일 메뉴 */
.mobile-nav{
  display:none;position:fixed;
  top:var(--header-h);left:0;right:0;bottom:0;
  background:rgba(11,26,39,.98);backdrop-filter:blur(14px);
  overflow-y:auto;z-index:999;
  padding:10px 0 40px;
  border-top:1px solid rgba(255,255,255,.07);
}
.mobile-nav.open{display:block;}
.mobile-nav-item>a{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 28px;font-size:15px;font-weight:600;
  color:rgba(255,255,255,.88);border-bottom:1px solid rgba(255,255,255,.06);
  transition:all var(--ease);
}
.mobile-nav-item>a:hover,.mobile-nav-item>a.active{color:var(--accent);}
.mobile-nav-item>a i{font-size:10px;transition:transform var(--ease);}
.mobile-nav-item.open>a i{transform:rotate(180deg);}
.mobile-sub{display:none;background:rgba(255,255,255,.04);}
.mobile-nav-item.open .mobile-sub{display:block;}
.mobile-sub a{
  display:flex;align-items:center;gap:8px;
  padding:11px 28px 11px 44px;
  font-size:13px;color:rgba(255,255,255,.6);
  border-bottom:1px solid rgba(255,255,255,.04);
  transition:all var(--ease);
}
.mobile-sub a i{color:var(--accent);width:14px;font-size:11px;}
.mobile-sub a:hover{color:var(--accent);padding-left:50px;}

/* ═══════════════════════════
   서브페이지 히어로
═══════════════════════════ */
.page-hero{
  padding:calc(var(--header-h) + 56px) 0 60px;
  background:linear-gradient(135deg,var(--dark) 0%,var(--dark-2) 55%,var(--primary-dark) 100%);
  position:relative;overflow:hidden;
  /* 헤더(z-index:1000)보다 낮게 설정하여 겹침 방지 */
  z-index:1;
}
/* 배경 이미지 오버레이 패턴 */
.page-hero::before{
  content:'';position:absolute;inset:0;
  background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.025'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/svg%3E");
  z-index:0;
}
/* 배경이미지 클래스 — 메뉴별 */
.page-hero.hero-product{
  /* 기본 그라디언트 덮어쓰기 — 이미지 단독 표시 */
  background:url('../images/hero/hero-product.jpg') center center / cover no-repeat;
}
.page-hero.hero-product::before{
  /* 이미지 위 반투명 다크 오버레이 — 텍스트 가독성 확보 */
  background:linear-gradient(120deg,rgba(4,18,40,.88) 0%,rgba(5,40,70,.72) 48%,rgba(0,110,140,.45) 100%);
}
.page-hero.hero-solution{
  background-image:url('../images/hero/hero-solution.jpg');
  background-size:cover;background-position:center;
}
.page-hero.hero-solution::before{
  background:linear-gradient(120deg,rgba(11,26,39,.90) 0%,rgba(11,26,39,.75) 50%,rgba(13,79,140,.68) 100%);
}
.page-hero.hero-consulting{
  background:url('../images/hero/hero-consulting.jpg') center center / cover no-repeat;
}
.page-hero.hero-consulting::before{
  /* 회의실 밝은 이미지 위 — 딥 블루 계열 오버레이로 사이트 색상 통일 */
  background:linear-gradient(120deg,
    rgba(4,18,42,.88) 0%,
    rgba(8,40,80,.76) 50%,
    rgba(0,95,130,.58) 100%);
}
.page-hero.hero-about{
  background-image:url('../images/hero/hero-about.jpg');
  background-size:cover;background-position:center;
}
.page-hero.hero-about::before{
  background:linear-gradient(120deg,rgba(11,26,39,.82) 0%,rgba(11,26,39,.68) 50%,rgba(26,63,92,.62) 100%);
}
.page-hero .container{position:relative;z-index:1;}

.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:6px;font-size:12px;color:rgba(255,255,255,.45);
  margin-bottom:18px;
}
.breadcrumb a{color:rgba(255,255,255,.45);transition:color var(--ease);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:rgba(255,255,255,.25);}
.breadcrumb .cur{color:#fff;font-weight:500;}
.page-hero-title{
  font-size:38px;font-weight:800;color:#fff;
  line-height:1.25;margin-bottom:14px;letter-spacing:-.5px;
}
.page-hero-title span{color:var(--accent);}
.page-hero-desc{
  font-size:15px;color:rgba(255,255,255,.62);
  max-width:480px;line-height:1.85;
}

/* ═══════════════════════════
   콘텐츠 공통 카드
═══════════════════════════ */
.card{
  background:#fff;border-radius:var(--radius-lg);
  border:1px solid var(--gray-2);
  box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);}

/* ─ 아이콘 박스 ─ */
.icon-box{
  width:56px;height:56px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:22px;margin-bottom:16px;flex-shrink:0;
}
.icon-box.primary{background:rgba(26,95,122,.1);color:var(--primary);}
.icon-box.accent{background:rgba(0,196,180,.1);color:var(--accent);}
.icon-box.orange{background:rgba(255,140,50,.1);color:#f58a20;}
.icon-box.purple{background:rgba(130,80,200,.1);color:#8250c8;}

/* ═══════════════════════════
   CTA 배너
═══════════════════════════ */
.cta-banner{
  background:linear-gradient(120deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);
  padding:70px 0;position:relative;overflow:hidden;
}
.cta-banner::after{
  content:'';position:absolute;
  right:-60px;top:-60px;
  width:340px;height:340px;border-radius:50%;
  background:rgba(255,255,255,.05);
}
.cta-inner{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  flex-wrap:wrap;
}
.cta-text h2{font-size:28px;font-weight:800;color:#fff;margin-bottom:8px;}
.cta-text p{font-size:15px;color:rgba(255,255,255,.7);}
.cta-btns{display:flex;gap:12px;flex-wrap:wrap;}

/* ═══════════════════════════
   FOOTER
═══════════════════════════ */
#site-footer{background:var(--dark);padding:10px 0 0;}
.footer-top{
  padding:24px 0 28px;
  border-bottom:1px solid rgba(255,255,255,.08);
  font-size:13px;color:rgba(255,255,255,.55);
  display:flex;flex-direction:column;gap:10px;
}
.footer-row{
  display:flex;align-items:center;gap:8px;line-height:1.6;
}
.footer-row i{color:var(--accent);font-size:13px;flex-shrink:0;width:14px;text-align:center;}
.footer-row span{vertical-align:middle;}
.footer-bottom{
  padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:rgba(255,255,255,.28);flex-wrap:wrap;gap:10px;
}
.footer-bottom a{color:rgba(255,255,255,.28);transition:color var(--ease);margin-left:18px;}
.footer-bottom a:hover{color:var(--accent);}
.footer-policy{color:rgba(255,255,255,.75) !important;font-weight:500;}

/* ═══════════════════════════
   유틸리티
═══════════════════════════ */
.bg-gray{background:var(--gray-1);}
.bg-dark{background:var(--dark);}
.text-accent{color:var(--accent);}
.text-primary{color:var(--primary);}

/* 스크롤 fade-up */
.fade-up{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease;}
.fade-up.visible{opacity:1;transform:translateY(0);}
.delay-1{transition-delay:.1s;}
.delay-2{transition-delay:.2s;}
.delay-3{transition-delay:.3s;}
.delay-4{transition-delay:.4s;}

/* ═══════════════════════════
   반응형
═══════════════════════════ */
@media(max-width:1024px){
  .container{padding:0 28px;}
  .section{padding:68px 0;}

}
@media(max-width:768px){
  :root{--header-h:60px;}
  .header-inner{padding:0 20px;}
  .container{padding:0 20px;}
  .section{padding:52px 0;}
  .section-title{font-size:26px;}
  .section-desc{font-size:14px;}
  .section-header{margin-bottom:38px;}
  .gnb,.header-right{display:none;}
  .hamburger{display:flex;}
  /* 모바일: 헤더 높이(60px) + 여백(48px) 확보 → 겹침 방지 */
  .page-hero{padding:calc(var(--header-h) + 48px) 0 44px;}
  .page-hero-title{font-size:28px;}
  .page-hero-desc{font-size:14px;}
  .footer-bottom{justify-content:center;}
  .cta-inner{flex-direction:column;text-align:center;}
  .cta-btns{justify-content:center;}
}
@media(max-width:640px){
  /* 소형 모바일: 헤더 높이(60px) + 여백(36px) */
  .page-hero{padding:calc(var(--header-h) + 36px) 0 36px;}
  .page-hero-title{font-size:24px;line-height:1.3;}
  .page-hero-desc{font-size:13px;}
}
@media(max-width:480px){
  .container{padding:0 16px;}
  .section{padding:40px 0;}
  .section-title{font-size:22px;}
  .page-hero-title{font-size:22px;}

  .btn{padding:11px 20px;font-size:13px;}
}