:root{
  --red:#9e2b25; --red-dark:#7c1f1a; --red-light:#c0392b;
  --ink:#22252a; --ink-soft:#4a4f57; --muted:#7b8089;
  --cream:#faf7f2; --paper:#ffffff; --line:#e8e2d8;
  --gold:#c8963e; --dark:#1d1f23; --dark2:#26292e;
  --maxw:1140px; --radius:14px;
  --shadow:0 10px 30px rgba(30,25,20,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{overflow-x:clip}
body{font-family:'Pretendard Variable',Pretendard,-apple-system,BlinkMacSystemFont,'Malgun Gothic','Apple SD Gothic Neo',sans-serif;color:var(--ink);background:var(--cream);line-height:1.7;word-break:keep-all}
body.menu-open{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ───────── header ───────── */
.topbar{background:var(--dark);color:#cfd2d8;font-size:12.5px;letter-spacing:.02em}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:34px}
.topbar span b{color:#fff;font-weight:600}
header.site{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:11px}
.logo svg{width:42px;height:42px;flex:none}
.logo .t1{font-size:19px;font-weight:800;letter-spacing:-.01em;line-height:1.15}
.logo .t2{font-size:10.5px;color:var(--muted);letter-spacing:.14em;font-weight:600}
nav.main{display:flex;align-items:center;gap:6px}
nav.main>ul{display:flex;gap:6px}
nav.main>ul>li{position:relative}
nav.main>ul>li>a{display:block;padding:26px 16px;font-weight:700;font-size:15.5px;color:var(--ink);transition:color .15s}
nav.main>ul>li>a:hover,nav.main>ul>li.active>a{color:var(--red)}
nav.main>ul>li.active>a{box-shadow:inset 0 -3px 0 var(--red)}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);min-width:190px;opacity:0;visibility:hidden;transition:all .18s;padding:8px}
li.has-sub:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown a{display:block;padding:10px 14px;border-radius:8px;font-size:14.5px;font-weight:600;color:var(--ink-soft)}
.dropdown a:hover{background:var(--cream);color:var(--red)}
.hamburger{display:none;background:none;border:0;cursor:pointer;padding:10px;position:relative;z-index:120}
.hamburger span{display:block;width:24px;height:2.5px;background:var(--ink);margin:5px 0;border-radius:2px;transition:.2s}
.hamburger.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ───────── hero ───────── */
.hero{position:relative;min-height:560px;display:flex;align-items:center;color:#fff;background:#000}
.hero .bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.52}
.hero .shade{position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,8,7,.88) 20%,rgba(30,12,8,.45) 70%,rgba(0,0,0,.15))}
.hero .wrap{position:relative;z-index:2;padding-top:70px;padding-bottom:70px}
.hero .eyebrow{display:inline-block;background:rgba(200,150,62,.18);border:1px solid rgba(200,150,62,.55);color:#eccb92;font-size:13px;font-weight:700;letter-spacing:.12em;padding:6px 14px;border-radius:99px;margin-bottom:22px}
.hero h1{font-size:clamp(30px,4.6vw,52px);font-weight:800;line-height:1.28;letter-spacing:-.01em;margin-bottom:18px}
.hero p.lead{font-size:clamp(15px,1.6vw,18.5px);color:#e3ded8;max-width:600px;margin-bottom:34px}
.btn{display:inline-block;padding:14px 28px;border-radius:10px;font-weight:700;font-size:15.5px;transition:.15s;cursor:pointer}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.55);color:#fff;margin-left:10px}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-outline{border:1.5px solid var(--red);color:var(--red)}
.btn-outline:hover{background:var(--red);color:#fff}

/* page hero (sub pages) */
.page-hero{background:linear-gradient(115deg,#231311 0%,#3a1b15 55%,#57241a 100%);color:#fff;padding:74px 0 60px;position:relative;overflow:hidden}
.page-hero:after{content:"";position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(200,150,62,.22),transparent 65%)}
.page-hero .crumb{font-size:13px;color:#caa;letter-spacing:.06em;margin-bottom:12px;font-weight:600}
.page-hero .crumb a{color:#e6c9a3}
.page-hero h1{font-size:clamp(27px,3.6vw,40px);font-weight:800;letter-spacing:-.01em}
.page-hero p{color:#ddd3cb;margin-top:12px;max-width:640px;font-size:16px}

/* ───────── sections ───────── */
section.block{padding:76px 0}
section.block.alt{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:42px}
.sec-head .kicker{color:var(--red);font-weight:800;font-size:13.5px;letter-spacing:.16em;margin-bottom:10px}
.sec-head h2{font-size:clamp(23px,2.8vw,32px);font-weight:800;letter-spacing:-.01em}
.sec-head p.sub{color:var(--ink-soft);margin-top:12px;max-width:680px;font-size:16px}
.center{text-align:center}
.center p.sub{margin-left:auto;margin-right:auto}

.grid{display:grid;gap:24px}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow)}
.card .ico{width:52px;height:52px;border-radius:13px;background:linear-gradient(135deg,#fdf1e3,#f7e2cf);display:flex;align-items:center;justify-content:center;font-size:25px;margin-bottom:18px}
.card h3{font-size:18.5px;font-weight:800;margin-bottom:10px}
.card p{font-size:14.8px;color:var(--ink-soft)}
.card .more{display:inline-block;margin-top:14px;color:var(--red);font-weight:700;font-size:14px}

/* stats */
.stats{background:var(--dark);color:#fff}
.stats .grid{gap:0}
.stat{padding:46px 20px;text-align:center;border-left:1px solid rgba(255,255,255,.09)}
.stat:first-child{border-left:0}
.stat .num{font-size:clamp(30px,3.6vw,46px);font-weight:800;color:#f0c987;letter-spacing:-.02em}
.stat .lbl{margin-top:8px;color:#b9bec7;font-size:14px}
.stats .note{padding:0 22px 26px;color:#8b919b;font-size:12.5px;text-align:center}

/* split (text+image) */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.split .imgbox{border-radius:18px;overflow:hidden;box-shadow:0 24px 50px rgba(40,20,10,.22)}
.split .imgbox img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.split h2{font-size:clamp(23px,2.8vw,31px);font-weight:800;margin-bottom:16px;letter-spacing:-.01em}
.split p{color:var(--ink-soft);margin-bottom:14px;font-size:15.5px}
.checks li{position:relative;padding-left:30px;margin-bottom:11px;font-weight:600;font-size:15px}
.checks li:before{content:"✓";position:absolute;left:0;top:0;width:21px;height:21px;background:var(--red);color:#fff;border-radius:50%;font-size:12px;display:flex;align-items:center;justify-content:center;margin-top:4px}

/* research cards */
.paper-card{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--red);border-radius:12px;padding:26px 28px;margin-bottom:18px;box-shadow:var(--shadow)}
.paper-card .meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:10px}
.badge{font-size:11.5px;font-weight:800;letter-spacing:.05em;padding:4px 11px;border-radius:99px}
.b-year{background:#f3ede2;color:#8a6d3b}
.b-survey{background:#e8f0fb;color:#2b5ea7}
.b-trial{background:#e7f5ec;color:#1e7a44}
.b-review{background:#f3e8fb;color:#7a3fa8}
.b-hist{background:#fdeeee;color:#a83f3f}
.b-case{background:#fff3e0;color:#b26a00}
.b-debate{background:#feecec;color:#c0392b}
.paper-card h3{font-size:17.5px;font-weight:800;line-height:1.45}
.paper-card .en{font-size:12.5px;color:var(--muted);font-weight:500;line-height:1.5;margin-top:4px}
.paper-card .src{color:var(--muted);font-size:13.5px;margin:6px 0 10px}
.paper-card p{font-size:14.8px;color:var(--ink-soft)}
.paper-card .caution{margin-top:10px;font-size:13.5px;color:#9a6b1f;background:#fdf6e7;border-radius:8px;padding:10px 14px}
.paper-card a.link{color:var(--red);font-weight:700;font-size:14px;display:inline-block;margin-top:12px}

/* tl;dr 요약 박스 */
.tldr{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:12px;padding:20px 24px;margin-bottom:34px;box-shadow:var(--shadow)}
.tldr h4{font-size:13px;font-weight:800;color:#8a6d3b;letter-spacing:.14em;margin-bottom:12px}
.tldr li{position:relative;padding-left:20px;margin-bottom:8px;font-size:14.8px;color:var(--ink-soft)}
.tldr li:last-child{margin-bottom:0}
.tldr li:before{content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:50%;background:var(--gold)}
.tldr li b{color:var(--ink)}

/* notice / warn */
.notice{background:#fdf6e7;border:1px solid #f0dfb6;border-radius:12px;padding:22px 26px;font-size:14.5px;color:#6e5619}
.notice b{color:#4f3d0e}
.notice.red{background:#fdeeee;border-color:#f2cfcf;color:#7c2a2a}
.notice.red b{color:#5e1d1d}
.notice h4{font-size:15.5px;margin-bottom:8px}

/* tables */
table.tbl{width:100%;border-collapse:collapse;background:var(--paper);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);font-size:14.8px}
.tbl th{background:var(--dark);color:#fff;padding:13px 16px;text-align:left;font-size:14px}
.tbl td{padding:13px 16px;border-bottom:1px solid var(--line);color:var(--ink-soft);vertical-align:top}
.tbl tr:last-child td{border-bottom:0}
.tbl td:first-child{font-weight:700;color:var(--ink);white-space:nowrap}
.tbl-scroll{overflow-x:auto;border-radius:12px}

/* faq */
.faq-item{background:var(--paper);border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow)}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 24px;font-weight:800;font-size:16px;display:flex;gap:14px;align-items:baseline}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .q{color:var(--red);font-weight:800;flex:none}
.faq-item summary:after{content:"+";margin-left:auto;color:var(--muted);font-size:20px;font-weight:400}
.faq-item[open] summary:after{content:"−"}
.faq-body{padding:0 24px 22px 58px;color:var(--ink-soft);font-size:14.8px}
.faq-body p{margin-bottom:10px}
.faq-body .ref{font-size:13px;color:var(--muted)}

/* steps */
.step{display:flex;gap:22px;margin-bottom:26px}
.step .n{flex:none;width:46px;height:46px;border-radius:50%;background:var(--red);color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center}
.step h3{font-size:17.5px;font-weight:800;margin-bottom:6px}
.step p{color:var(--ink-soft);font-size:14.8px}

/* news */
.news-item{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:26px 30px;margin-bottom:16px;box-shadow:var(--shadow);display:flex;gap:26px;align-items:flex-start}
.news-item .date{flex:none;text-align:center;background:var(--cream);border:1px solid var(--line);border-radius:10px;padding:10px 16px}
.news-item .date .d{font-size:21px;font-weight:800;color:var(--red)}
.news-item .date .ym{font-size:12px;color:var(--muted);font-weight:600}
.news-item h3{font-size:17.5px;font-weight:800;margin-bottom:6px}
.news-item p{color:var(--ink-soft);font-size:14.8px}
.tag{display:inline-block;font-size:11.5px;font-weight:800;color:var(--red);background:#fdeeee;padding:3px 10px;border-radius:99px;margin-bottom:8px}

/* cta band */
.cta-band{background:linear-gradient(115deg,#57241a,#7c1f1a 60%,#9e2b25);color:#fff;text-align:center;padding:70px 22px}
.cta-band h2{font-size:clamp(22px,3vw,30px);font-weight:800;margin-bottom:12px}
.cta-band p{color:#eedcd2;margin-bottom:28px;font-size:15.5px}

/* footer */
footer.site{background:var(--dark);color:#a7acb5;font-size:14px}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding:58px 0 40px}
footer h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:16px}
footer .flogo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
footer .flogo svg{width:34px;height:34px}
footer .flogo b{color:#fff;font-size:16.5px}
footer li{margin-bottom:9px}
footer a:hover{color:#fff}
footer .fine{border-top:1px solid rgba(255,255,255,.1);padding:22px 0 30px;font-size:12.5px;color:#7c828c;line-height:1.75}
footer .fine .disc{margin-bottom:8px}

/* misc */
.mt10{margin-top:10px}.mt20{margin-top:20px}.mt30{margin-top:30px}.mt40{margin-top:40px}
.small{font-size:13px;color:var(--muted)}
.divider{height:1px;background:var(--line);margin:34px 0}
h3.sub-title{font-size:20px;font-weight:800;margin:34px 0 14px;letter-spacing:-.01em}
.prose p{margin-bottom:14px;color:var(--ink-soft);font-size:15.3px}
.prose b{color:var(--ink)}
.imgband{border-radius:16px;overflow:hidden;box-shadow:var(--shadow);margin:26px 0}
.imgband img{width:100%;max-height:380px;object-fit:cover}
.ref-note{font-size:12.5px;color:var(--muted);margin-top:6px}

@media(max-width:960px){
  .g3,.g4{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr;gap:34px}
  footer .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:780px){
  /* 상단 보조바 숨김 + 헤더 축소 */
  .topbar{display:none}
  .nav-inner{height:60px}
  .logo{gap:8px}
  .logo svg{width:34px;height:34px}
  .logo .t1{font-size:15.5px}
  .logo .t2{font-size:8.5px;letter-spacing:.09em}
  .hamburger{display:block}
  /* 전체화면 오버레이 메뉴 (display 토글 방식) */
  nav.main{display:none;position:fixed;top:60px;left:0;right:0;bottom:0;background:#fff;overflow-y:auto;z-index:110;border-top:1px solid var(--line);-webkit-overflow-scrolling:touch}
  nav.main.open{display:block}
  nav.main>ul{display:block;padding:8px 20px 60px}
  nav.main>ul>li>a{padding:16px 4px;border-bottom:1px solid var(--line);font-size:17px}
  nav.main>ul>li.active>a{box-shadow:none;color:var(--red)}
  /* 모바일에서는 하위메뉴 항상 펼침 → 탭 즉시 이동 */
  .dropdown{position:static;transform:none;opacity:1;visibility:visible;display:block;box-shadow:none;border:0;background:var(--cream);border-radius:12px;margin:10px 0 16px;padding:6px;min-width:0}
  .dropdown a{padding:13px 16px;font-size:15.5px}
  /* 레이아웃 */
  .wrap{padding:0 18px}
  section.block{padding:44px 0}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .grid{gap:14px}
  .hero{min-height:0}
  .hero .wrap{padding-top:48px;padding-bottom:48px}
  .hero .eyebrow{font-size:11px;padding:5px 12px;margin-bottom:16px}
  .hero h1{font-size:27px;line-height:1.35}
  .hero p.lead{font-size:14.5px;margin-bottom:26px}
  .hero .btn{display:block;text-align:center;margin:0 0 12px;padding:14px 20px}
  .btn-ghost{margin-left:0}
  /* 통계: 세로 나열 대신 가로 컴팩트 행 */
  .stats .grid{grid-template-columns:1fr;gap:0}
  .stat{display:flex;align-items:center;gap:16px;text-align:left;border-left:0;border-top:1px solid rgba(255,255,255,.09);padding:16px 20px}
  .stat:first-child{border-top:0}
  .stat .num{font-size:24px;flex:none;min-width:118px}
  .stat .lbl{margin-top:0;font-size:12.5px;line-height:1.5}
  .stat .lbl br{display:none}
  .stats .note{font-size:11px;padding:12px 18px 20px}
  .page-hero{padding:40px 0 34px}
  .page-hero h1{font-size:24px}
  .page-hero p{font-size:14px;margin-top:8px}
  .page-hero .crumb{font-size:11.5px}
  /* 섹션 타이포 */
  .sec-head{margin-bottom:26px}
  .sec-head .kicker{font-size:11.5px;margin-bottom:6px}
  .sec-head h2{font-size:21px}
  .sec-head p.sub{font-size:14px;margin-top:8px}
  .split{gap:24px}
  .split h2{font-size:21px}
  .split p{font-size:14.5px}
  .split .imgbox img{aspect-ratio:16/9}
  .prose p{font-size:14.8px;margin-bottom:12px}
  .checks li{font-size:14px;margin-bottom:9px;padding-left:28px}
  .card{padding:20px 18px}
  .card .ico{width:42px;height:42px;font-size:20px;margin-bottom:12px;border-radius:10px}
  .card h3{font-size:16px;margin-bottom:7px}
  .card p{font-size:13.8px}
  .tldr{padding:16px 18px;margin-bottom:24px}
  .tldr li{font-size:13.8px}
  /* 표 → 카드형 변환 */
  .tbl-scroll{overflow:visible;border-radius:0}
  table.tbl,.tbl tbody,.tbl tr,.tbl td{display:block;width:100%}
  table.tbl{background:transparent;box-shadow:none;border-radius:0}
  .tbl tr:first-child{display:none}
  .tbl tr{background:var(--paper);border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:15px 17px;box-shadow:var(--shadow)}
  .tbl td{padding:0;border:0;white-space:normal;font-size:13.8px}
  .tbl td:first-child{font-size:15px;font-weight:800;color:var(--red);margin-bottom:4px;white-space:normal}
  .tbl td:first-child br{display:none}
  .tbl td+td{margin-top:7px}
  .tbl td[data-label]:not(:first-child):before{content:attr(data-label);display:block;font-size:10.5px;font-weight:800;color:var(--muted);letter-spacing:.08em;margin-bottom:1px}
  /* 연구자료 카드 */
  .paper-card{padding:18px 16px;margin-bottom:12px}
  .paper-card h3{font-size:15.5px;line-height:1.5}
  .paper-card .en{font-size:11.5px}
  .paper-card .src{font-size:12px}
  .paper-card p{font-size:13.5px}
  .paper-card .caution{font-size:12.5px;padding:9px 12px}
  .badge{font-size:10.5px;padding:3px 9px}
  /* 기타 */
  .notice{padding:16px 16px;font-size:13.5px}
  .notice h4{font-size:14.5px}
  .step .n{width:38px;height:38px;font-size:15px}
  .step h3{font-size:15.5px}
  .step p{font-size:13.8px}
  .news-item{flex-direction:column;gap:12px;padding:20px 18px}
  .news-item h3{font-size:16px}
  .news-item p{font-size:13.8px}
  .news-item .date{align-self:flex-start;display:flex;gap:6px;align-items:baseline;padding:6px 12px}
  .news-item .date .d{font-size:16px}
  .faq-item summary{padding:16px 16px;font-size:14.5px;gap:10px;line-height:1.5}
  .faq-body{padding:0 16px 18px;font-size:13.8px}
  footer .cols{grid-template-columns:1fr;gap:26px;padding:38px 0 26px}
  footer.site{font-size:13.5px}
  .cta-band{padding:46px 18px}
  .cta-band p{font-size:14px}
  h3.sub-title{font-size:17px}
}