/* =========================================================
   K&C인증원 홈페이지 스타일
   ★ 색상만 바꾸고 싶다면 아래 :root 값만 바꾸세요 ★
   ※ 화면에 나오는 "글자"는 content.md 에서 수정합니다.
   ========================================================= */
:root{
  --brand:#0b3a6f;        /* 메인 남색 */
  --brand-2:#1769c0;      /* 포인트 파랑 */
  --brand-3:#0aa5b1;      /* 보조 청록 */
  --ink:#141b26;          /* 진한 글자색 */
  --muted:#5c6a7a;        /* 흐린 글자색 */
  --line:#e6ebf1;         /* 경계선 */
  --bg:#ffffff;
  --bg-soft:#f4f7fb;      /* 옅은 배경 */
  --radius:16px;
  --shadow:0 10px 30px rgba(11,58,111,.08);
  --shadow-lg:0 24px 60px rgba(11,58,111,.16);
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Pretendard",system-ui,-apple-system,"Malgun Gothic",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;
  -webkit-font-smoothing:antialiased;letter-spacing:-.01em;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.eyebrow{display:inline-block;font-size:13px;font-weight:800;letter-spacing:.18em;color:var(--brand-2);margin-bottom:14px}
.sec-title{font-size:clamp(26px,4vw,40px);font-weight:800;line-height:1.25;letter-spacing:-.02em}
.sec-desc{color:var(--muted);margin-top:14px;font-size:17px}
section{padding:96px 0}
.center{text-align:center}

/* ========== content.md 안내 배너 ==========
   content.md 를 못 읽었을 때(파일을 그냥 더블클릭해서 열었을 때)만 보입니다. */
.file-notice{background:#fff4e5;border-bottom:1px solid #f0d3a8;color:#7a4b00;font-size:13.5px;padding:10px 22px;text-align:center;line-height:1.55}
.file-notice b{font-weight:800}

/* ================= HEADER ================= */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:21px;color:var(--brand)}
.logo .mark{width:38px;height:38px;border-radius:10px;overflow:hidden;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-size:15px;font-weight:800}
.logo .mark img{width:100%;height:100%;object-fit:cover;display:block}
.menu{display:flex;gap:6px;align-items:center}
.menu>li{position:relative;list-style:none}
.menu>li>a{display:block;padding:12px 16px;font-weight:600;font-size:16px;border-radius:10px;color:var(--ink)}
.menu>li:hover>a{background:var(--bg-soft);color:var(--brand)}
.dropdown{position:absolute;top:100%;left:0;min-width:230px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:.18s ease;list-style:none}
.menu>li:hover .dropdown{opacity:1;visibility:visible;transform:translateY(4px)}
.dropdown li a{display:block;padding:10px 14px;border-radius:9px;font-size:15px;color:var(--muted);font-weight:500}
.dropdown li a:hover{background:var(--bg-soft);color:var(--brand-2)}
.nav-cta{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;padding:11px 20px;border-radius:999px;font-weight:700;font-size:15px;transition:.2s}
.nav-cta:hover{background:var(--brand-2);transform:translateY(-1px)}
.hamb{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.hamb span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}

/* ================= HERO ================= */
.hero{position:relative;color:#fff;overflow:hidden;background:radial-gradient(1200px 500px at 80% -10%,rgba(10,165,177,.35),transparent 60%),radial-gradient(900px 500px at 0% 110%,rgba(23,105,192,.45),transparent 55%),linear-gradient(135deg,#08284c 0%,#0b3a6f 55%,#124a8a 100%)}
.hero .wrap{padding-top:104px;padding-bottom:112px;position:relative;z-index:2}
.hero .eyebrow{color:#8fd4ff}
.hero h1{font-size:clamp(32px,5.2vw,58px);font-weight:800;line-height:1.18;letter-spacing:-.025em}
.hero p{margin-top:22px;font-size:clamp(16px,2vw,19px);color:#d7e6f6;max-width:640px}
.hero-btns{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;padding:15px 30px;border-radius:999px;font-weight:700;font-size:16px;transition:.2s;cursor:pointer;border:0}
.btn-primary{background:#fff;color:var(--brand)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,0,0,.25)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px}
.hero-badges .brk{flex-basis:100%;height:0}
.hero-badges span{font-size:13.5px;font-weight:600;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);color:#eaf3fc}
.hero-wave{position:absolute;bottom:-1px;left:0;width:100%;z-index:1;line-height:0}

/* ================= COMPANY ================= */
.company-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.company-text .sec-title{margin-top:6px}
.company-text p{color:var(--muted);margin-top:20px;font-size:17px}
.company-visual{border-radius:24px;min-height:340px;position:relative;overflow:hidden;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:var(--shadow-lg);display:grid;place-items:center;color:#fff;padding:30px}
.company-visual .seal{width:150px;height:150px;border-radius:50%;border:3px solid rgba(255,255,255,.55);display:grid;place-items:center;text-align:center;font-weight:800;background:rgba(255,255,255,.08)}
.company-visual .seal b{display:block;font-size:30px;letter-spacing:.05em}
.company-visual .seal small{font-size:12px;letter-spacing:.15em;opacity:.85;font-weight:600}
.ribbon{position:absolute;font-size:12px;font-weight:700;letter-spacing:.1em;color:rgba(255,255,255,.7)}

/* ================= STATS ================= */
.stats{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 20px;text-align:center;box-shadow:var(--shadow)}
.stat .num{font-size:clamp(30px,4vw,46px);font-weight:800;color:var(--brand);letter-spacing:-.02em}
.stat .num .suf{color:var(--brand-3)}
.stat .lab{margin-top:8px;color:var(--muted);font-weight:600;font-size:15px}

/* ================= BUSINESS (그룹형) ================= */
.biz-group{margin-top:64px}
.biz-group:first-child{margin-top:52px}
.biz-group-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;border-bottom:2px solid var(--line);padding-bottom:16px;margin-bottom:30px}
.biz-group-eng{font-size:12.5px;font-weight:800;letter-spacing:.18em;color:var(--brand-2)}
.biz-group-name{font-size:clamp(20px,2.6vw,26px);font-weight:800;margin-top:6px;position:relative;padding-left:16px}
.biz-group-name::before{content:"";position:absolute;left:0;top:6px;bottom:4px;width:5px;border-radius:3px;background:linear-gradient(var(--brand),var(--brand-3))}
.biz-group-desc{color:var(--muted);font-size:15px;max-width:420px;text-align:right}
.biz-items{display:grid;grid-template-columns:repeat(auto-fill,minmax(206px,1fr));gap:20px}
.biz-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px 18px 24px;text-align:center;transition:.22s;position:relative;overflow:hidden}
.biz-item::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:linear-gradient(90deg,var(--brand),var(--brand-3));transform:scaleX(0);transition:.25s}
.biz-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.biz-item:hover::after{transform:scaleX(1)}
.biz-item .mark{height:66px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.biz-item .mark svg{max-height:58px;max-width:132px;width:auto;height:auto}
.biz-item .mark img{max-height:60px;max-width:150px;width:auto;height:auto;object-fit:contain}
.biz-item h4{font-size:16px;font-weight:800;word-break:keep-all;line-height:1.35}
.biz-item p{font-size:13px;color:var(--muted);margin-top:9px;line-height:1.55;word-break:keep-all}

/* ================= LOCATION ================= */
.loc{background:var(--bg-soft)}
.loc-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:40px;margin-top:52px}
.map-box{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);min-height:380px;background:#dfe7ef}
.map-box iframe{width:100%;height:100%;min-height:380px;border:0;display:block}
.loc-info{display:flex;flex-direction:column;gap:16px}
.loc-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;gap:16px;align-items:flex-start}
.loc-item .ic{flex:0 0 44px;height:44px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
.loc-item .ic svg{width:22px;height:22px}
.loc-item h4{font-size:14px;color:var(--muted);font-weight:700;letter-spacing:.03em}
.loc-item p{font-weight:600;margin-top:3px;font-size:16px;word-break:keep-all}
.loc-item a{color:var(--brand-2)}

/* ================= CONTACT ================= */
.contact-sec{background:radial-gradient(900px 400px at 90% 0%,rgba(10,165,177,.3),transparent 60%),linear-gradient(135deg,#08284c,#0b3a6f 60%,#124a8a)}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center;margin-top:44px}
.contact-left .sec-title{color:#fff}
.contact-left .sec-desc{color:#cfe0f2}
.contact-left .eyebrow{color:#8fd4ff}
.contact-left ul{list-style:none;margin-top:26px;display:flex;flex-direction:column;gap:14px}
.contact-left li{display:flex;gap:12px;align-items:center;color:#eaf3fc;font-weight:600}
.contact-left li svg{width:20px;height:20px;color:#8fd4ff;flex:0 0 auto}
.form{background:#fff;border-radius:20px;padding:34px;box-shadow:var(--shadow-lg)}
.form h3{font-size:20px;font-weight:800;margin-bottom:6px}
.form .sub{color:var(--muted);font-size:14px;margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:700;margin-bottom:7px}
.field label span{color:#e0483b}
.field input,.field select,.field textarea{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:11px;font-size:15px;font-family:inherit;background:#fbfcfe;transition:.15s;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--brand-2);background:#fff;box-shadow:0 0 0 4px rgba(23,105,192,.1)}
.field textarea{resize:vertical;min-height:110px}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-submit{width:100%;background:var(--brand);color:#fff;padding:15px;border:0;border-radius:11px;font-size:16px;font-weight:700;cursor:pointer;transition:.2s}
.form-submit:hover{background:var(--brand-2)}
.form-note{font-size:12.5px;color:var(--muted);text-align:center;margin-top:12px}

/* ================= FOOTER ================= */
footer{background:#0a1a2f;color:#aebfd2;padding:56px 0 32px}
.foot-top{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start}
.foot-brand{font-weight:800;font-size:20px;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:12px}
.foot-msg{max-width:440px;font-size:15px;color:#9fb2c8}
.foot-contact{font-size:14px;line-height:2}
.foot-contact b{color:#dfe9f5}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:22px;font-size:13px;color:#7c90a8}

.to-top{position:fixed;right:22px;bottom:22px;width:48px;height:48px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.25s;z-index:90;cursor:pointer;border:0}
.to-top.show{opacity:1;pointer-events:auto}
.reveal{opacity:0;transform:translateY(24px);transition:.6s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ================= 반응형 ================= */
@media(max-width:960px){
  .company-grid,.loc-grid,.contact-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  section{padding:72px 0}
}
@media(max-width:720px){
  .hamb{display:flex}
  .menu{position:fixed;top:74px;right:0;height:calc(100vh - 74px);width:min(320px,86vw);background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:14px;box-shadow:var(--shadow-lg);transform:translateX(105%);transition:.28s;overflow-y:auto}
  .menu.open{transform:none}
  .menu>li>a{padding:14px 12px;border-bottom:1px solid var(--line)}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 8px 10px;min-width:0}
  .menu>li:hover .dropdown{transform:none}
  .nav-cta{display:none}
  .biz-group-head{flex-direction:column;align-items:flex-start;gap:8px}
  .biz-group-desc{text-align:left}
  .biz-items{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:460px){ .biz-items{grid-template-columns:1fr} }