:root{
  --green:#2e9d5a;
  --green-light:#3fbf72;
  --green-bar:#3f9e5d;
  --ink:#1b2430;
  --muted:#5a6572;
  --line:#e5e9ee;
  --white:#ffffff;
  --header-h:88px;
}
*{box-sizing:border-box;margin:0;padding:0;min-width:0}
html,body{overflow-x:hidden;max-width:100%}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans KR",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);background:#060e16;line-height:1.5;-webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;height:var(--header-h);
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;
  padding:0 clamp(20px,4vw,64px);z-index:1000;
  transition:background .3s ease, box-shadow .3s ease, height .3s ease;
}
.site-header.scrolled{background:rgba(255,255,255,.97);box-shadow:0 2px 16px rgba(0,0,0,.08);height:72px}

.logo{display:flex;align-items:center;gap:10px;justify-self:start}
.logo-mark{height:42px;width:auto;flex:none}
.logo-text{font-weight:900;font-size:26px;letter-spacing:-.5px;color:var(--white);transition:color .3s ease}
.scrolled .logo-text{color:var(--ink)}

.main-nav{justify-self:center}
.main-nav ul{display:flex;gap:clamp(20px,2.6vw,46px)}
.main-nav a{
  position:relative;display:inline-block;color:var(--white);font-weight:500;font-size:17px;letter-spacing:1px;
  padding:9px 6px;transition:color .25s ease, letter-spacing .25s ease;
}
/* 호버/활성 → 초록 밑줄 + 살짝 넓은 자간 (스크린샷 효과) */
.main-nav a::after{
  content:"";position:absolute;left:6px;right:6px;bottom:-4px;height:2px;background:var(--green);
  transform:scaleX(0);transform-origin:center;transition:transform .28s ease;
}
.main-nav a:hover,.main-nav a.active{color:#fff;letter-spacing:2px}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.scrolled .main-nav a{color:var(--ink)}
.scrolled .main-nav a:hover,.scrolled .main-nav a.active{color:var(--green)}

.header-utils{display:flex;align-items:center;gap:18px;justify-self:end;position:relative}
.lang-menu{position:absolute;top:calc(100% + 10px);right:0;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 12px 30px rgba(0,0,0,.16);overflow:hidden;min-width:150px;display:none;z-index:1100}
.lang-menu.open{display:block}
.lang-menu button{display:block;width:100%;text-align:left;padding:13px 20px;background:none;border:none;font-size:15px;color:var(--ink);cursor:pointer;font-family:inherit}
.lang-menu button + button{border-top:1px solid var(--line)}
.lang-menu button:hover{background:#f1f6f3}
.lang-menu button.active{color:var(--green);font-weight:700}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;
  border:none;background:transparent;cursor:pointer;color:var(--white);transition:color .25s ease;
}
.scrolled .icon-btn{color:var(--ink)}
.icon-btn:hover{color:var(--green)}
.icon-btn svg{width:26px;height:26px}
.menu-toggle{display:none}

/* ===== Hero (메인) ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:var(--white);overflow:hidden}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(ellipse 60% 42% at 50% -8%, rgba(188,224,236,.40), rgba(188,224,236,0) 60%),
    radial-gradient(120% 100% at 72% 20%, #1c4a60 0%, #0e2a38 42%, #081722 72%, #050d14 100%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg, rgba(5,12,19,.78) 0%, rgba(5,12,19,.30) 52%, rgba(5,12,19,.55) 100%),
    radial-gradient(120% 120% at 50% 50%, transparent 55%, rgba(0,0,0,.45) 100%);
}
.hero-slides{position:relative;z-index:2;width:100%}
.slide{
  position:absolute;inset:0;display:flex;align-items:center;padding:0 clamp(20px,6vw,120px);
  opacity:0;visibility:hidden;transform:translateY(18px);
  transition:opacity .9s ease, transform .9s ease, visibility .9s;
}
.slide.active{opacity:1;visibility:visible;transform:none}
.slide-inner{max-width:900px}
.eyebrow{font-size:clamp(16px,2vw,22px);font-weight:400;opacity:.92;margin-bottom:20px}
.slide h2{font-size:clamp(34px,6vw,70px);font-weight:700;line-height:1.26;letter-spacing:-1px}
.hero-sizer{visibility:hidden;padding:0 clamp(20px,6vw,120px)}
.hero-sizer h2{font-size:clamp(34px,6vw,70px);line-height:1.26}

.hero-controls{position:absolute;z-index:3;left:clamp(20px,6vw,120px);bottom:48px;display:flex;align-items:center;gap:18px}
.dots{display:flex;align-items:center;gap:14px}
.dot{width:9px;height:9px;border-radius:50%;border:none;cursor:pointer;background:rgba(255,255,255,.45);padding:0;transition:all .25s ease;position:relative}
.dot:hover{background:rgba(255,255,255,.8)}
.dot.active{background:var(--white)}
.dot.active::after{content:"";position:absolute;inset:-6px;border:1.5px solid rgba(255,255,255,.7);border-radius:50%}
.play-toggle{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border:none;background:transparent;color:#fff;cursor:pointer;opacity:.85}
.play-toggle:hover{opacity:1}
.play-toggle svg{width:18px;height:18px}

.section-indicator{position:fixed;z-index:900;right:clamp(16px,2.5vw,40px);top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.section-indicator a{display:flex;align-items:center;gap:12px;justify-content:flex-end;color:rgba(255,255,255,.7);font-size:14px;font-weight:500;letter-spacing:1px;padding:8px 12px;border:1px solid transparent;border-radius:3px;transition:all .25s ease}
.section-indicator a .sdot{width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.6);flex:none}
.section-indicator a:hover{color:#fff}
.section-indicator a.active{color:#fff;border-color:rgba(255,255,255,.85)}
.section-indicator a.active .sdot{background:var(--green-light);box-shadow:0 0 0 3px rgba(63,191,114,.25)}

.quick-bar{position:absolute;z-index:3;right:0;bottom:0;display:flex;background:var(--green-bar);box-shadow:0 -6px 24px rgba(0,0,0,.18)}
.quick-bar a{display:flex;align-items:center;gap:12px;color:#fff;font-size:17px;font-weight:500;padding:24px 40px;position:relative;transition:background .2s ease}
.quick-bar a + a::before{content:"";position:absolute;left:0;top:22%;bottom:22%;width:1px;background:rgba(255,255,255,.3)}
.quick-bar a:hover{background:rgba(0,0,0,.10)}
.quick-bar svg{width:22px;height:22px;flex:none}

/* ===== 서브 페이지 공통 ===== */
.page-banner{
  position:relative;min-height:340px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;color:#fff;padding:var(--header-h) 20px 40px;overflow:hidden;
}
.page-banner::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(ellipse 55% 40% at 50% -10%, rgba(188,224,236,.30), rgba(188,224,236,0) 60%),
    radial-gradient(120% 120% at 70% 20%, #1c4a60 0%, #0e2a38 45%, #081722 75%, #050d14 100%);
}
.page-banner > *{position:relative;z-index:1}
.page-banner h1{font-size:clamp(34px,5vw,54px);font-weight:700;letter-spacing:3px;margin-bottom:12px}
.page-banner .ko{font-size:clamp(15px,2vw,19px);opacity:.9;font-weight:400}
.breadcrumb{margin-top:22px;font-size:14px;opacity:.8;display:flex;gap:10px;align-items:center;justify-content:center}
.breadcrumb .sep{opacity:.5}
.breadcrumb .cur{color:var(--green-light);font-weight:500}

.page-tabs{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:72px;z-index:500}
.page-tabs ul{display:flex;justify-content:center;flex-wrap:wrap;gap:4px;max-width:1100px;margin:0 auto}
.page-tabs a{display:inline-block;padding:18px 28px;font-weight:500;color:var(--muted);border-bottom:3px solid transparent;transition:all .2s ease}
.page-tabs a:hover{color:var(--ink)}
.page-tabs a.active{color:var(--green);border-bottom-color:var(--green)}

.section{background:#fff;padding:clamp(48px,7vw,96px) 20px}
.container{max-width:1080px;margin:0 auto}
.section-label{color:var(--green);font-weight:700;letter-spacing:2px;font-size:14px;margin-bottom:16px}
.section h2{font-size:clamp(26px,3.6vw,40px);font-weight:700;line-height:1.35;letter-spacing:-.5px;color:var(--ink)}

/* 인사말 */
.greeting{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(32px,5vw,72px);align-items:center}
.greeting .photo{
  border-radius:12px;min-height:360px;
  background:
    radial-gradient(ellipse 60% 45% at 50% 0%, rgba(188,224,236,.25), transparent 60%),
    radial-gradient(130% 120% at 70% 20%, #1c4a60 0%, #0e2a38 50%, #081722 100%);
  display:flex;align-items:flex-end;padding:28px;color:#fff;
}
.greeting .photo span{font-size:13px;opacity:.7}
.greeting .photo.has-img{padding:0;background-size:cover;background-position:center;background-repeat:no-repeat}
.greeting .photo.img-rnd{background-image:url('/assets/rnd-photo.jpg')}
.greeting .photo.img-recruit{background-image:url('/assets/recruit-photo.jpg')}
.greeting .photo.photo-free{padding:0;min-height:0;background:none;overflow:hidden}
.greeting .photo.photo-free img{width:100%;height:auto;display:block}
.greeting p{color:#44505c;font-size:clamp(15px,1.6vw,17px);line-height:1.9;margin-top:22px}
.greeting .sign{margin-top:28px;font-size:16px;color:var(--ink)}
.greeting .sign b{font-weight:700;font-size:20px;margin-left:8px}

/* 회사개요 */
.alt{background:#f6f8f9}
.overview{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:40px}
.ov-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:28px 30px}
.ov-card .k{font-size:13px;color:var(--green);font-weight:700;letter-spacing:1px;margin-bottom:8px}
.ov-card .v{font-size:18px;font-weight:500;color:var(--ink)}
.ov-card .v small{display:block;color:var(--muted);font-weight:400;font-size:14px;margin-top:4px}

/* ===== 제품 (PRODUCT) ===== */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.prod-card{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;transition:transform .2s ease, box-shadow .2s ease}
.prod-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(0,0,0,.09)}
.prod-thumb{aspect-ratio:4/3;display:flex;align-items:flex-end;padding:16px;color:rgba(255,255,255,.65);font-size:12px;overflow:hidden;
  background:radial-gradient(120% 120% at 70% 15%, #1c4a60 0%, #0e2a38 55%, #081722 100%)}
.prod-thumb.has-img{padding:0;background:#fff;align-items:stretch}
.prod-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.prod-card .body{padding:22px 24px}
.prod-card .cat{font-size:12px;color:var(--green);font-weight:700;letter-spacing:1px}
.prod-card h3{font-size:19px;margin:8px 0 6px;color:var(--ink);font-weight:700}
.prod-card p{font-size:14px;color:var(--muted);line-height:1.7}

.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:40px}
.cat-card{display:flex;gap:18px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:26px 28px;background:#fff;transition:border-color .2s ease, box-shadow .2s ease}
.cat-card:hover{border-color:var(--green);box-shadow:0 10px 24px rgba(0,0,0,.06)}
.cat-ico{flex:none;width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:#eef6f1;color:var(--green)}
.cat-ico svg{width:26px;height:26px}
.cat-card h3{font-size:19px;color:var(--ink);font-weight:700;margin-bottom:6px}
.cat-card p{font-size:14px;color:var(--muted);line-height:1.7}

/* 2단 카드 그리드 (연구분야 등) */
.col2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:40px}

/* 공지/목록 (CS·IR) */
.notice-list{margin-top:40px;border-top:2px solid var(--ink)}
.notice-list a{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:20px 10px;border-bottom:1px solid var(--line);color:var(--ink)}
.notice-list a:hover{background:#f6f8f9;color:var(--green)}
.notice-list .t{font-weight:500}
.notice-list .d{color:var(--muted);font-size:14px;flex:none}

/* 인증현황 */
.cert-grid{display:flex;flex-wrap:wrap;gap:24px;margin-top:40px}
.cert-card{width:280px;max-width:100%;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;transition:box-shadow .2s ease, transform .2s ease}
.cert-card:hover{box-shadow:0 14px 30px rgba(0,0,0,.10);transform:translateY(-3px)}
.cert-card .thumb{display:block;background:#f3f5f7;border-bottom:1px solid var(--line)}
.cert-card .thumb img{width:100%;height:auto;display:block}
.cert-card .cap{padding:16px;text-align:center}
.cert-card .cap .nm{font-weight:700;color:var(--ink);font-size:15px}
.cert-card .cap .sub{color:var(--muted);font-size:13px;margin-top:4px}
.cert-view{display:flex;align-items:center;justify-content:center;gap:6px;padding:12px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.cert-view:hover{color:var(--green)}
.cert-view svg{width:16px;height:16px}
@media (max-width:640px){ .cert-card{width:100%} }

/* 공지 상세 */
.notice-detail{margin-top:40px;border-top:2px solid var(--ink)}
.notice-detail .nd-head{padding:28px 10px;border-bottom:1px solid var(--line)}
.notice-detail .nd-title{font-size:clamp(20px,2.6vw,28px);font-weight:700;color:var(--ink);line-height:1.45}
.notice-detail .nd-date{margin-top:12px;color:var(--muted);font-size:14px}
.notice-detail .nd-body{padding:36px 10px;color:#44505c;font-size:16px;line-height:1.95;white-space:pre-line;min-height:160px}
.detail-actions{margin-top:32px;text-align:center}
.btn-line{display:inline-flex;align-items:center;gap:8px;padding:14px 34px;border:1px solid var(--ink);border-radius:6px;color:var(--ink);font-weight:500;transition:background .2s ease, color .2s ease}
.btn-line:hover{background:var(--ink);color:#fff}

/* 빈 상태 */
.empty-state{margin-top:40px;text-align:center;padding:64px 24px;border:1px dashed #cdd6dd;border-radius:12px;color:var(--muted)}
.empty-state .big{font-size:18px;color:var(--ink);margin-bottom:8px;font-weight:500}

/* 연락 카드 (CS) */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.contact-card{text-align:center;border:1px solid var(--line);border-radius:12px;padding:34px 24px;background:#fff}
.contact-card .ci{width:54px;height:54px;border-radius:50%;background:#eef6f1;color:var(--green);display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.contact-card .ci svg{width:26px;height:26px}
.contact-card h3{font-size:15px;color:var(--muted);font-weight:500;margin-bottom:8px}
.contact-card .v{font-size:18px;color:var(--ink);font-weight:700;line-height:1.5}
.contact-card .v small{display:block;font-size:13px;color:var(--muted);font-weight:400;margin-top:6px}

/* ===== 상담 폼 ===== */
.agree-box{border:1px solid var(--line);border-radius:10px;padding:28px 30px;margin-top:40px}
.agree-box h3{font-size:18px;font-weight:700;color:var(--ink)}
.agree-box .desc{color:var(--muted);margin-top:16px;line-height:1.85;font-size:15px}
.agree-box hr{border:none;border-top:1px solid var(--line);margin:22px 0}
.agree-row{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.agree-check{display:flex;align-items:center;gap:10px;font-size:16px;color:var(--ink);cursor:pointer}
.agree-check input{width:18px;height:18px;accent-color:var(--green)}
.btn-ghost{border:1px solid var(--line);background:#fafbfc;border-radius:6px;padding:12px 20px;font-size:14px;color:var(--ink);cursor:pointer;font-family:inherit}
.btn-ghost:hover{background:#f1f3f5}
.req{color:#e23b3b}

.form-head{display:flex;justify-content:space-between;align-items:flex-end;margin-top:56px;flex-wrap:wrap;gap:8px}
.form-head h2{font-size:clamp(22px,3vw,30px);font-weight:700;color:var(--ink)}
.form-head .req-note{color:var(--muted);font-size:14px}

.form-table{width:100%;border-top:2px solid var(--ink);border-collapse:collapse;margin-top:16px}
.form-table th{width:180px;background:#fafbfc;text-align:left;vertical-align:middle;padding:18px 24px;font-size:15px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line)}
.form-table td{padding:14px 20px;border-bottom:1px solid var(--line);vertical-align:middle}
.form-table input[type=text],.form-table textarea,.form-table select{font-family:inherit;font-size:15px;color:var(--ink);border:1px solid #cdd6dd;border-radius:6px;padding:12px 14px;width:100%;background:#fff}
.form-table input[type=text]:focus,.form-table textarea:focus,.form-table select:focus{outline:none;border-color:var(--green)}
.input-single{max-width:440px}
.email-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.email-row input{max-width:190px}
.email-row .at{color:var(--muted)}
.email-row select{max-width:170px}
.form-table textarea{min-height:220px;resize:vertical}
.file-note{color:var(--muted);font-size:14px;margin-top:10px}

.form-actions{text-align:right;margin-top:32px}
.btn-submit{border:1.5px solid var(--green);color:var(--green);background:#fff;border-radius:40px;padding:16px 50px;font-size:17px;font-weight:700;cursor:pointer;font-family:inherit;transition:background .2s ease,color .2s ease}
.btn-submit:hover{background:var(--green);color:#fff}
.btn-submit:disabled{opacity:.5;cursor:default}

.form-msg{margin-top:24px;padding:16px 20px;border-radius:8px;font-size:15px;display:none}
.form-msg.show{display:block}
.form-msg.ok{background:#eaf6ef;color:#1d7a46;border:1px solid #bfe3cd}
.form-msg.err{background:#fdecec;color:#c0392b;border:1px solid #f3c6c2}

/* 개인정보처리방침 모달 */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:center;justify-content:center;z-index:2000;padding:20px}
.modal.open{display:flex}
.modal-box{background:#fff;border-radius:12px;max-width:640px;width:100%;max-height:80vh;overflow:auto;padding:32px}
.modal-box h3{font-size:20px;font-weight:700;margin-bottom:16px;color:var(--ink)}
.modal-box p{color:#44505c;line-height:1.85;font-size:14px;white-space:pre-line}
.modal-foot{margin-top:20px;text-align:right}

@media (max-width:720px){
  .form-table th{width:92px;padding:14px 10px;font-size:13px}
  .form-table td{padding:12px 10px}
  .email-row input{max-width:120px}
  .email-row select{max-width:130px}
}

/* ===== Footer ===== */
.site-footer{background:#0d1a24;color:rgba(255,255,255,.7);padding:48px 20px 40px}
.footer-inner{max-width:1080px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px;align-items:flex-start}
.footer-logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:22px}
.footer-logo svg,.footer-logo img{height:34px;width:auto}
.footer-info{font-size:14px;line-height:1.9}
.footer-info .copy{margin-top:14px;opacity:.55;font-size:13px}

/* ===== 반응형 ===== */
@media (max-width:1100px){ .section-indicator{display:none} }
@media (max-width:960px){
  .site-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 16px}
  .logo-text{font-size:20px}
  .logo-mark{height:34px;width:auto}
  .main-nav{position:fixed;inset:var(--header-h) 0 auto 0;background:rgba(255,255,255,.98);box-shadow:0 10px 24px rgba(0,0,0,.12);display:none;padding:12px 0;max-height:calc(100vh - var(--header-h));overflow-y:auto}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:0}
  .main-nav a{display:block;color:var(--ink);padding:16px 28px;font-size:17px}
  .main-nav a::after{display:none}
  .main-nav a:hover,.main-nav a.active{letter-spacing:1px;background:#f1f6f3;color:var(--green);font-weight:700}
  .menu-toggle{display:inline-flex}
  .greeting{grid-template-columns:1fr}
  .overview{grid-template-columns:1fr}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:1fr}
  .col2{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:600px){
  .prod-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .hero-controls{bottom:104px}
  .quick-bar{left:0;right:0;justify-content:center}
  .quick-bar a{flex:1;justify-content:center;padding:18px 8px;font-size:15px;gap:8px}
  .quick-bar svg{width:19px;height:19px}
  .page-tabs{top:72px}
  .page-tabs a{padding:14px 16px;font-size:14px}
}
@media (max-width:420px){ .quick-bar a span{font-size:13px} .quick-bar a{gap:6px;padding:16px 4px} }