:root{
  --ink:#0f1626; --ink2:#5b6476; --mute:#a3a9c2; --line:#e3e6ec; --bg:#fafbfd; --blue:#2f5bff; --mint:#14bfa0; --peach:#ff9a76;
  --grad:linear-gradient(120deg,#2f5bff,#4f7dff 45%,#5cc3ff);
  --sans:'Pretendard Variable',Pretendard,sans-serif; --serif:'Noto Serif KR',serif;
  --pad:clamp(16px,4vw,48px); --max:1280px; --r:24px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6;word-break:keep-all;overflow-x:hidden}
a{color:inherit;text-decoration:none} button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img{display:block;max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.bar{font-style:normal;color:var(--mute);margin:0 .5em}

.strip{background:var(--ink);color:#d6d9ea;font-size:13px;text-align:center;padding:8px var(--pad)}
.strip b{color:#fff}
.hd{position:sticky;top:0;z-index:50;background:rgba(251,251,254,.8);backdrop-filter:blur(16px) saturate(160%);border-bottom:1px solid transparent;transition:.3s}
.hd.solid{border-color:var(--line)}
.hd .wrap{display:flex;align-items:center;gap:30px;height:70px}
.nav{display:flex;gap:6px}
.nav a,.nav button{padding:9px 14px;border-radius:12px;font-size:15.5px;font-weight:700}
.nav a:hover,.nav button:hover,.nav button[aria-expanded=true]{background:#e8eeff;color:var(--blue)}
.hd .r{margin-left:auto;display:flex;gap:8px;align-items:center}
.store{padding:10px 16px;border-radius:12px;background:var(--grad);color:#fff;font-weight:700;font-size:14px;white-space:nowrap;box-shadow:0 10px 20px -10px #2f5bff}
.store small{opacity:.75;font-weight:500;margin-left:4px}
.burger{display:none;width:44px;height:44px;border-radius:12px;background:#e8eeff;position:relative}
.burger i{position:absolute;left:13px;right:13px;height:2px;border-radius:2px;background:var(--blue);transition:.3s}
.burger i:nth-child(1){top:15px}.burger i:nth-child(2){top:21px}.burger i:nth-child(3){top:27px}
.menu-open .burger i:nth-child(1){top:21px;transform:rotate(45deg)}.menu-open .burger i:nth-child(2){opacity:0}.menu-open .burger i:nth-child(3){top:21px;transform:rotate(-45deg)}

.mega{position:absolute;left:0;right:0;top:70px;padding:0 var(--pad);pointer-events:none}
.mega .in{max-width:calc(var(--max) - 2*var(--pad));margin:10px auto 0;background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:0 30px 60px -24px rgba(20,40,110,.3);padding:28px;display:grid;grid-template-columns:1fr 1fr 1.2fr;gap:28px;opacity:0;transform:translateY(-10px) scale(.98);transform-origin:top center;transition:.3s cubic-bezier(.2,.8,.2,1);visibility:hidden}
.mega.open{pointer-events:auto}.mega.open .in{opacity:1;transform:none;visibility:visible}
.mega h4,.sheet h4{font-size:13px;color:var(--ink2);margin-bottom:12px;font-weight:700}
.bubbles{display:flex;flex-wrap:wrap;gap:8px}
.bub{padding:10px 16px;border-radius:14px;background:#f1f4f9;font-weight:700;font-size:15px;transition:.2s}
.bub:hover{background:#dde6ff;color:var(--blue)}
.bub.on{background:var(--blue);color:#fff}
.bub.empty{color:var(--mute);background:#f6f8fb}
.bub.empty::after{content:' 준비 중';font-size:11px;font-weight:500}
.mser a{display:flex;align-items:center;gap:12px;padding:10px;border-radius:16px}
.mser a:hover{background:#f4f7fd}
.mser img{width:40px;aspect-ratio:210/297;object-fit:cover;border-radius:5px;box-shadow:0 6px 12px -6px rgba(0,0,0,.4)}
.mser b{display:block;font-size:14.5px}.mser small{font-size:12.5px;color:var(--ink2)}
.sheet{position:fixed;left:10px;right:10px;top:84px;bottom:10px;z-index:49;background:#fff;border-radius:28px;box-shadow:0 30px 60px -20px rgba(20,40,110,.35);padding:24px 20px;overflow:auto;opacity:0;transform:scale(.96);visibility:hidden;transition:.3s cubic-bezier(.2,.8,.2,1)}
.menu-open .sheet{opacity:1;transform:none;visibility:visible}
.sheet .big{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:20px}
.sheet .big a{padding:16px;border-radius:18px;background:#f3f6fb;font-weight:800;font-size:16px}
.sheet h4{margin-top:18px}

/* 히어로 */
.hero{position:relative;overflow:hidden;padding:clamp(36px,6vw,80px) 0 clamp(40px,5vw,70px)}
.hero .bgimg{position:absolute;inset:0;background:url(../img/tex_ribbon_blue.jpg) center/cover;opacity:.7}
.hero .bgimg::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(250,251,253,.92) 0,rgba(250,251,253,.55) 45%,rgba(250,251,253,.1) 75%)}
@media (max-width:760px){.hero .bgimg::after{background:linear-gradient(180deg,rgba(250,251,253,.9) 0,rgba(250,251,253,.6) 45%,rgba(250,251,253,.2))}}
#mesh{position:absolute;inset:0;width:100%;height:100%;mix-blend-mode:multiply;opacity:.55}
.hero .wrap{position:relative;display:grid;grid-template-columns:1fr 1.05fr;gap:30px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:99px;background:rgba(255,255,255,.75);backdrop-filter:blur(8px);font-size:13.5px;font-weight:700;color:var(--blue);box-shadow:0 4px 14px -6px rgba(47,91,255,.4)}
.eyebrow i{font-family:var(--serif);font-style:normal}
.hero h1{font-size:clamp(36px,5.4vw,70px);line-height:1.12;letter-spacing:-.04em;font-weight:850;margin:20px 0 16px}
.hero h1 .gd{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.l{font-size:clamp(15px,1.4vw,18px);color:var(--ink2);max-width:430px}
.quick{margin-top:26px;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);border-radius:22px;padding:14px;box-shadow:0 20px 40px -24px rgba(20,40,110,.35);max-width:520px}
.quick .row{display:flex;gap:6px;flex-wrap:wrap}
.quick .row+.row{margin-top:8px;padding-top:8px;border-top:1px solid var(--line)}
.quick .lab{font-size:12px;font-weight:800;color:var(--ink2);width:34px;display:flex;align-items:center}
.quick .bub{padding:7px 12px;font-size:14px;border-radius:11px;background:#f1f4f9}
/* 카드 회전목마 */
.carousel{position:relative;height:clamp(340px,40vw,520px);perspective:1400px}
.ring{position:absolute;left:50%;top:50%;width:0;height:0;transform-style:preserve-3d}
.ring .cd{position:absolute;width:clamp(130px,14vw,190px);aspect-ratio:210/297;left:0;top:0;transform-style:preserve-3d;border-radius:8px}
.ring .cd img{width:100%;height:100%;object-fit:cover;border-radius:6px 10px 10px 6px;box-shadow:0 30px 40px -20px rgba(30,30,90,.55);backface-visibility:hidden}
.ring .cd .sh{position:absolute;inset:0;border-radius:6px 10px 10px 6px;background:#1a1d40;opacity:var(--d,0);backface-visibility:hidden;pointer-events:none}
.ring .cd .bk{position:absolute;inset:0;border-radius:10px 6px 6px 10px;background:var(--c);transform:rotateY(180deg);backface-visibility:hidden;display:grid;place-items:center;color:#fff;font-weight:800;font-size:13px;text-align:center;padding:10px;opacity:.95}
.badge-float{position:absolute;right:4%;bottom:6%;background:#fff;border-radius:18px;padding:12px 16px;box-shadow:0 20px 40px -18px rgba(20,40,110,.4);font-size:13px;z-index:3}
.badge-float b{display:block;font-size:15px}
.badge-float .dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--mint);margin-right:6px;animation:pulse 1.6s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 6px rgba(20,191,160,.2)}}

.marquee{overflow:hidden;border-block:1px solid var(--line);background:#fff;padding:14px 0}
.marquee .tr{display:flex;gap:40px;width:max-content;animation:mq 40s linear infinite;font-weight:800;font-size:18px;color:#c3c9d6}
.marquee span b{color:var(--ink)}
@keyframes mq{to{transform:translateX(-50%)}}

section.s{padding:clamp(70px,9vw,120px) 0}
.sh{text-align:center;margin-bottom:36px}
.sh .k{display:inline-block;font-size:13px;font-weight:800;color:var(--blue);background:#e8eeff;padding:5px 12px;border-radius:99px;margin-bottom:12px}
.sh h2{font-size:clamp(28px,3.6vw,46px);letter-spacing:-.04em;line-height:1.2}
.sh p{color:var(--ink2);margin-top:10px}

.tabs{position:relative;display:flex;gap:4px;background:#eef2f8;padding:5px;border-radius:18px;width:max-content;max-width:100%;margin:0 auto;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs .ind{position:absolute;top:5px;bottom:5px;left:0;width:0;border-radius:14px;background:#fff;box-shadow:0 4px 12px -4px rgba(20,40,110,.25);transition:left .35s cubic-bezier(.2,.8,.2,1),width .35s cubic-bezier(.2,.8,.2,1)}
.tabs button{position:relative;z-index:1;padding:10px 18px;border-radius:14px;font-weight:700;font-size:15px;color:var(--ink2);white-space:nowrap}
.tabs button.on{color:var(--ink)}
.tabs button.empty{color:var(--mute)}
.tabs button.empty small{font-size:10px;margin-left:3px}
.tabs+.tabs{margin-top:10px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-top:30px}
.bc{background:#fff;border-radius:var(--r);padding:16px;border:1px solid var(--line);transition:.3s}
.bc:hover{transform:translateY(-6px);box-shadow:0 24px 40px -24px rgba(20,40,110,.4)}
.bc .im{background:color-mix(in srgb,var(--c) 10%,#fff);border-radius:16px;padding:18px 26px;margin-bottom:14px}
.bc .im img{aspect-ratio:210/297;object-fit:cover;border-radius:4px 8px 8px 4px;box-shadow:0 16px 22px -12px rgba(0,0,0,.45)}
.bc b{display:block;font-size:15px;line-height:1.4}
.bc small{color:var(--ink2);font-size:13px}
.bc .chip{display:inline-block;margin-top:8px;font-size:11.5px;font-weight:800;padding:3px 9px;border-radius:99px;background:#e8eeff;color:#2f5bff}
.empty-card{grid-column:1/-1;border-radius:var(--r);background:#fff;border:2px dashed var(--line);padding:50px 20px;text-align:center;color:var(--ink2)}
.empty-card .e{font-size:40px;line-height:1;margin-bottom:12px}
.empty-card b{display:block;color:var(--ink);font-size:19px;margin-bottom:4px}

.bento{display:grid;grid-template-columns:1.2fr 1fr;gap:16px}
.bt{position:relative;border-radius:30px;padding:26px;overflow:hidden;background:linear-gradient(160deg,color-mix(in srgb,var(--c) 18%,#fff),#fff 70%);border:1px solid var(--line);min-height:260px;display:flex;flex-direction:column}
.bt:first-child{grid-row:span 2}
.bt .covers{display:flex;gap:8px;margin-top:auto;padding-top:20px}
.bt .covers img{flex:1;min-width:0;aspect-ratio:210/297;object-fit:cover;border-radius:4px 8px 8px 4px;box-shadow:0 18px 24px -14px rgba(0,0,0,.5);transition:transform .4s}
.bt:hover .covers img:nth-child(1){transform:translateY(-8px) rotate(-3deg)}
.bt:hover .covers img:nth-child(2){transform:translateY(-14px)}
.bt:hover .covers img:nth-child(3){transform:translateY(-8px) rotate(3deg)}
.bt .lv{font-size:12.5px;font-weight:800;color:var(--c)}
.bt h3{font-size:22px;letter-spacing:-.03em;line-height:1.3;margin:4px 0 6px}
.bt:first-child h3{font-size:30px}
.bt p{color:var(--ink2);font-size:14.5px}
.bt .meta{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.bt .meta span{font-size:12px;font-weight:700;padding:4px 10px;border-radius:99px;background:rgba(255,255,255,.8);border:1px solid var(--line)}
.bt:not(:first-child) .covers img{max-width:28%}
.bt:not(:first-child){flex-direction:column;gap:0}
.bt:not(:first-child) .covers{flex:none;padding-top:18px;justify-content:flex-start}
.bt:not(:first-child) .covers img{flex:0 0 24%;max-width:24%}
.bt:first-child .covers img{max-width:31%}

/* 레벨 계단 */
.steps{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;align-items:end;min-height:420px}
.stp{border-radius:22px 22px 10px 10px;background:linear-gradient(180deg,color-mix(in srgb,var(--blue) calc(var(--i) * 9% + 8%),#fff),#fff);border:1px solid var(--line);padding:14px 10px;display:flex;flex-direction:column;gap:8px;height:calc(140px + var(--i) * 40px);transform-origin:bottom}
.stp.e{background:repeating-linear-gradient(135deg,#fff 0 8px,#f5f5fb 8px 9px);border-style:dashed}
.stp .g{font-weight:850;font-size:20px;letter-spacing:-.03em}
.stp.e .g{color:var(--mute)}
.stp .bs{display:flex;flex-wrap:wrap;gap:4px}
.stp .bs img{width:calc(33% - 3px);aspect-ratio:210/297;object-fit:cover;border-radius:3px;box-shadow:0 4px 8px -4px rgba(0,0,0,.4)}
.stp .t{font-size:12px;color:var(--ink2);margin-top:auto}
.stp.e .t{color:var(--mute)}

.duo{display:grid;grid-template-columns:1.2fr 1fr;gap:16px}
.panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:26px}
.panel h3{font-size:22px;letter-spacing:-.03em;display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.panel h3 a{font-size:13px;color:var(--ink2);font-weight:600}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tiles a{display:flex;gap:12px;align-items:center;padding:14px;border-radius:18px;background:#f5f7fb;transition:.2s}
.tiles a:hover{background:#e8eeff}
.tiles svg{width:38px;height:38px;flex:none;padding:8px;border-radius:12px;background:#fff;color:var(--blue)}
.tiles b{display:block;font-size:15px}.tiles small{color:var(--ink2);font-size:12.5px}
.nl a{display:flex;gap:12px;align-items:center;padding:13px 0;border-top:1px solid var(--line)}
.nl .t{font-size:11.5px;font-weight:800;padding:3px 9px;border-radius:8px;background:#e8eeff;color:var(--blue);white-space:nowrap}
.nl span.x{flex:1;font-size:14.5px}
.nl time{font-size:12.5px;color:var(--mute);white-space:nowrap}

.ft{background:#f1f4f9;padding:50px 0 70px;font-size:13px;color:var(--ink2);line-height:1.9;margin-top:40px}
.ft .top{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:16px}
.ft nav{display:flex;gap:16px;color:var(--ink);font-weight:700;flex-wrap:wrap}
.rv{opacity:0;transform:translateY(30px)}
.no-motion .rv{opacity:1;transform:none}
.no-motion .marquee .tr{animation:none}

@media (max-width:1000px){
  .hero .wrap{grid-template-columns:1fr}
  .bento{grid-template-columns:1fr 1fr}.bt:first-child{grid-column:1/-1;grid-row:auto}
  .duo{grid-template-columns:1fr}
}
@media (max-width:860px){ .nav,.hd .store{display:none} .burger{display:block} .mega{display:none} }
@media (max-width:760px){
  .strip{font-size:12px}
  .hero h1{margin:16px 0 12px}
  .quick{padding:10px;margin-top:20px}
  .quick .lab{width:100%;margin-bottom:2px}
  .quick .bub{padding:6px 10px;font-size:13px}
  .hero .wrap{display:flex;flex-direction:column;align-items:stretch;gap:0}
  .hero .wrap>div:first-child{display:contents}
  .quick{order:3}
  .hv{order:2;margin:4px 0 0}
  .carousel{height:290px}
  .ring .cd{width:96px}
  .badge-float{right:0;bottom:0;padding:10px 12px}
  .tabs button{padding:9px 13px;font-size:14px}
  .cards{grid-template-columns:1fr 1fr;gap:10px}
  .bc{padding:10px;border-radius:18px}.bc .im{padding:12px 16px;border-radius:12px}
  .bc b{font-size:13.5px}
  .bento{grid-template-columns:1fr}
  .bt.soon:not(:first-child){flex-direction:column;align-items:flex-start}
  .bt.soon .dots{margin-top:14px}
  .bt:not(:first-child){flex-direction:column;align-items:stretch}
  .bt:not(:first-child) .covers{flex:auto;justify-content:start;padding-top:16px}
  .bt:not(:first-child) .covers img{max-width:30%}
  .bt:first-child h3{font-size:24px}
  .steps{grid-template-columns:1fr;min-height:0;gap:8px}
  .stp{height:auto;flex-direction:row;align-items:center;border-radius:18px;width:calc(58% + var(--i) * 7%);padding:12px 14px;gap:12px}
  .stp .g{font-size:17px;width:38px;flex:none}
  .stp .bs{flex-wrap:nowrap}
  .stp .bs img{width:28px}
  .stp .t{margin:0 0 0 auto;white-space:nowrap}
  .tiles{grid-template-columns:1fr}
}
.logo{display:flex;align-items:center;gap:10px;color:inherit;flex:none}.logo svg{width:38px;height:38px;flex:none;display:block;border-radius:9px;box-shadow:0 0 0 1px #e3e6ec}.logo .wm{font-size:19px;line-height:1.1}.wm{font-family:'Pretendard Variable',Pretendard,sans-serif;font-weight:800;letter-spacing:-.01em;white-space:nowrap}.wm span{font-family:'IBM Plex Mono',monospace;font-weight:600;letter-spacing:.14em;color:#5b6476;margin-left:.45em;font-size:.72em}
/* 로고 칸 장식 */
.dots{display:grid;grid-template-columns:repeat(7,1fr);gap:5px;width:150px;margin-top:auto;padding-top:18px}
.dots i{aspect-ratio:1;border-radius:3px;background:#e3e8f2}.dots i.on{background:var(--blue)}
.bt.soon{--c:#2f5bff;background:repeating-linear-gradient(135deg,#fff 0 10px,#f6f8fc 10px 11px);border-style:dashed}
.bt.soon:not(:first-child){grid-column:1/-1;min-height:0}
@media (min-width:761px){.bt.soon:not(:first-child){flex-direction:row;align-items:center;gap:40px}.bt.soon .dots{margin:0;padding:0;flex:none}}
.cell-mark{display:inline-grid;grid-template-columns:repeat(3,4px);gap:2px;vertical-align:middle;margin-right:6px}
.cell-mark i{width:4px;height:4px;border-radius:1px;background:#c9d4ee}.cell-mark i.on{background:var(--blue)}

.skip{position:absolute;left:-999px;top:0;z-index:100;background:#fff;padding:10px 14px}.skip:focus{left:10px}
.nav a[aria-current=page]{background:#e8eeff;color:var(--blue)}

/* ===== 하위 페이지 공통 ===== */
a.bub{display:inline-block}
.ph{position:relative;overflow:hidden;padding:clamp(36px,6vw,72px) 0 clamp(28px,4vw,48px);background:linear-gradient(180deg,#eef3ff,var(--bg))}
.ph::after{content:'';position:absolute;right:-40px;top:-30px;width:280px;height:200px;background:radial-gradient(circle,#d3defc 2.5px,transparent 3px) 0 0/22px 22px;opacity:.7;pointer-events:none}
.crumb{display:flex;flex-wrap:wrap;gap:6px;font-size:13px;color:var(--ink2);margin-bottom:14px}
.crumb a:hover{color:var(--blue)}
.crumb span[aria-hidden]{color:var(--mute)}
.ph h1{font-size:clamp(30px,4.4vw,52px);letter-spacing:-.04em;line-height:1.15}
.ph p{color:var(--ink2);margin-top:10px;max-width:640px}
.sec{padding:clamp(40px,6vw,72px) 0}
.sec+.sec{padding-top:0}
.sec h2{font-size:clamp(22px,2.6vw,30px);letter-spacing:-.03em;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.note{font-size:13px;color:var(--ink2)}
.draft{display:inline-block;font-size:12.5px;font-weight:800;color:#b45309;background:#fff4e5;border:1px solid #fde1b8;border-radius:8px;padding:4px 10px;margin-bottom:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 22px;border-radius:14px;font-weight:800;font-size:15px;border:1.5px solid var(--line);background:#fff;transition:.2s;white-space:nowrap}
.btn:hover{border-color:var(--blue);color:var(--blue)}
.btn.pri{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 12px 24px -12px rgba(47,91,255,.8)}
.btn.pri:hover{color:#fff;filter:brightness(1.05)}
.btn[aria-disabled=true]{background:#f1f4f9;color:var(--ink2);border-color:var(--line);box-shadow:none;cursor:default}

/* 교재 목록 */
.flt{position:sticky;top:70px;z-index:5;background:rgba(250,251,253,.92);backdrop-filter:blur(10px);padding:12px 0;border-bottom:1px solid var(--line)}
.flt .row{display:flex;gap:6px;align-items:center;overflow-x:auto;scrollbar-width:none;padding:3px 0}
.flt .row::-webkit-scrollbar{display:none}
.flt .lab{font-size:12.5px;font-weight:800;color:var(--ink2);width:40px;flex:none}
.flt button{padding:8px 14px;border-radius:12px;background:#f1f4f9;font-weight:700;font-size:14px;white-space:nowrap;flex:none}
.flt button.on{background:var(--blue);color:#fff}
.flt button.empty{color:var(--mute)}
.flt button.empty small{font-size:10.5px;margin-left:3px}
.sr-block{padding:36px 0;border-bottom:1px solid var(--line);scroll-margin-top:150px}
.sr-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.sr-head .lv{font-size:12.5px;font-weight:800;color:var(--c)}
.sr-head h2{font-size:clamp(22px,2.6vw,30px);letter-spacing:-.03em;margin:2px 0 4px}
.sr-head p{color:var(--ink2);font-size:14.5px;max-width:560px}
.grid-books{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:16px}
.none-msg{display:none;border:2px dashed var(--line);border-radius:24px;padding:46px 20px;text-align:center;color:var(--ink2);margin-top:30px}
.none-msg b{display:block;color:var(--ink);font-size:19px;margin-bottom:4px}

/* 교재 상세 */
.bd-top{display:grid;grid-template-columns:minmax(260px,420px) 1fr;gap:clamp(28px,5vw,72px);align-items:start}
.cover3d{position:relative;perspective:1400px;padding:10px 20px 30px}
.cover3d .bk{position:relative;transform-style:preserve-3d;transform:rotateY(-18deg) rotateX(4deg);transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.cover3d img{width:100%;aspect-ratio:210/297;object-fit:cover;border-radius:3px 10px 10px 3px;box-shadow:24px 30px 50px -20px rgba(15,22,38,.55);display:block}
.cover3d .sp{position:absolute;left:0;top:0;bottom:0;width:22px;background:linear-gradient(90deg,rgba(0,0,0,.25),rgba(255,255,255,.15) 40%,rgba(0,0,0,.08));border-radius:3px 0 0 3px;pointer-events:none}
.cover3d .pg{position:absolute;top:6px;bottom:6px;right:-14px;width:16px;background:repeating-linear-gradient(90deg,#f4f1e8 0 2px,#ddd6c6 2px 3px);transform:rotateY(70deg);transform-origin:left;border-radius:0 3px 3px 0}
.bd-info .tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:800;color:var(--c);background:color-mix(in srgb,var(--c) 10%,#fff);padding:5px 12px;border-radius:99px}
.bd-info h1{font-size:clamp(28px,3.6vw,44px);letter-spacing:-.04em;line-height:1.2;margin:14px 0 8px}
.bd-info .line{font-size:17px;color:var(--ink2)}
.spec{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.spec th{width:120px;text-align:left;font-weight:600;color:var(--ink2);padding:11px 0;border-bottom:1px solid var(--line);vertical-align:top}
.spec td{padding:11px 0;border-bottom:1px solid var(--line)}
.spec td.tbd{color:var(--mute)}
.status{display:inline-block;font-size:12px;font-weight:800;padding:3px 10px;border-radius:99px;background:#e8eeff;color:var(--blue)}
.acts{display:flex;gap:10px;flex-wrap:wrap}
.lede{font-size:17px;line-height:1.8;max-width:760px}
.toc details{border:1px solid var(--line);border-radius:16px;background:#fff;margin-bottom:8px;overflow:hidden}
.toc summary{cursor:pointer;list-style:none;display:flex;gap:12px;align-items:center;padding:15px 18px;font-weight:800}
.toc summary::-webkit-details-marker{display:none}
.toc summary .no{font-size:12px;color:var(--blue);background:#e8eeff;border-radius:8px;padding:3px 8px;flex:none}
.toc summary .cnt{margin-left:auto;font-size:12.5px;color:var(--ink2);font-weight:600;white-space:nowrap}
.toc summary::after{content:'';width:8px;height:8px;border:solid var(--ink2);border-width:0 2px 2px 0;transform:rotate(45deg);margin-left:4px;transition:transform .2s;flex:none}
.toc details[open] summary::after{transform:rotate(-135deg)}
.toc ol{list-style:none;padding:0 18px 14px 18px;margin:0;display:grid;gap:6px}
.toc li{display:flex;gap:10px;font-size:14.5px;padding:6px 0;border-top:1px dashed var(--line)}
.toc li span{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--ink2);padding-top:2px;flex:none}
.toc-empty,.pv-empty{border:2px dashed var(--line);border-radius:20px;padding:34px 20px;text-align:center;color:var(--ink2)}

/* 미리보기 넘겨 보기 */
.flip{position:relative;max-width:900px;margin:0 auto}
.flip .stage{position:relative;display:flex;justify-content:center;perspective:2200px;aspect-ratio:420/297;background:linear-gradient(180deg,#eef2f8,#e3e8f2);border-radius:20px;padding:4%}
.flip .pg2{position:relative;width:50%;height:100%;background:#fff;box-shadow:0 10px 30px -14px rgba(15,22,38,.4);display:grid;place-items:center;overflow:hidden}
.flip .pg2.l{border-radius:4px 0 0 4px}.flip .pg2.r{border-radius:0 4px 4px 0}
.flip .pg2 img{width:100%;height:100%;object-fit:contain}
.flip .ph-page{display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--ink2);font-size:14px;text-align:center;padding:10%}
.flip .ph-page .dots{width:90px;padding:0;margin:0}
.flip .turn{position:absolute;top:4%;bottom:4%;left:50%;width:46%;transform-origin:left center;transform-style:preserve-3d;transition:transform .7s cubic-bezier(.4,.1,.2,1);z-index:3;pointer-events:none}
.flip .turn>div{position:absolute;inset:0;backface-visibility:hidden;background:#fff;display:grid;place-items:center;overflow:hidden;box-shadow:0 10px 30px -14px rgba(15,22,38,.4)}
.flip .turn .back{transform:rotateY(180deg)}
.flip .turn img{width:100%;height:100%;object-fit:contain}
.flip .ctl{display:flex;justify-content:center;align-items:center;gap:14px;margin-top:14px}
.flip .ctl button{width:44px;height:44px;border-radius:14px;background:#fff;border:1.5px solid var(--line);font-size:18px;font-weight:800}
.flip .ctl button:disabled{opacity:.35}
.flip .ctl span{font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--ink2);min-width:70px;text-align:center}

/* 학습자료실 */
.res-tools{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:18px}
.res-tools select{font:inherit;font-size:14.5px;padding:11px 14px;border-radius:12px;border:1.5px solid var(--line);background:#fff;max-width:100%}
.res-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.res-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}
.res-card .bk{display:flex;gap:12px;align-items:center;padding-bottom:12px;border-bottom:1px solid var(--line)}
.res-card .bk img{width:40px;aspect-ratio:210/297;object-fit:cover;border-radius:4px;box-shadow:0 6px 12px -6px rgba(0,0,0,.4)}
.res-card .bk b{display:block;font-size:15px;line-height:1.35}.res-card .bk small{font-size:12.5px;color:var(--ink2)}
.res-card ul{list-style:none;margin:0;padding:0}
.res-card li{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line)}
.res-card li:last-child{border-bottom:0}
.res-card li b{display:block;font-size:14.5px}.res-card li small{font-size:12.5px;color:var(--ink2)}
.res-card .s{font-size:12px;font-weight:700;color:var(--mute);background:#f1f4f9;border-radius:8px;padding:4px 9px;white-space:nowrap}
.res-card a.dl{font-size:13px;font-weight:800;color:#fff;background:var(--blue);border-radius:8px;padding:6px 12px}

/* 새 소식, 고객센터, 문서 */
.news-item{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px 24px;margin-bottom:12px;scroll-margin-top:100px}
.news-item .m{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--ink2);margin-bottom:6px}
.news-item .t{font-size:11.5px;font-weight:800;padding:3px 9px;border-radius:8px;background:#e8eeff;color:var(--blue)}
.news-item h2{font-size:19px;margin:0 0 6px}
.news-item p{color:var(--ink2)}
.news-item:target{border-color:var(--blue);box-shadow:0 0 0 3px #e8eeff}
.faq details{border:1px solid var(--line);border-radius:16px;background:#fff;margin-bottom:8px}
.faq summary{cursor:pointer;padding:16px 18px;font-weight:800;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:'Q';color:var(--blue);margin-right:10px}
.faq p{padding:0 18px 16px 42px;color:var(--ink2)}
.ask{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ask .card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px}
.ask .card b{display:block;font-size:17px;margin-bottom:4px}
.ask .card p{color:var(--ink2);font-size:14.5px;margin-bottom:14px}
.doc{max-width:820px}
.doc h2{font-size:20px;margin:30px 0 10px}
.doc p,.doc li{color:var(--ink2);font-size:15px;line-height:1.8}
.doc ul,.doc ol{padding-left:20px}
.doc .doc-date{font-size:13.5px;font-weight:700;color:var(--ink2);margin-bottom:6px}
.doc .info-table{margin:12px 0 6px}
.doc a{color:var(--blue);text-decoration:underline}
.info-table{width:100%;border-collapse:collapse;font-size:15px}
.info-table th{width:170px;text-align:left;color:var(--ink2);font-weight:600;padding:13px 0;border-bottom:1px solid var(--line);vertical-align:top}
.info-table td{padding:13px 0;border-bottom:1px solid var(--line)}

/* 회사 소개 */
.name{display:grid;grid-template-columns:1fr 1fr 1.3fr;gap:16px;align-items:stretch}
.hz{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;display:flex;flex-direction:column;gap:6px}
.hz .c{font-family:'Noto Serif KR',serif;font-weight:900;font-size:clamp(70px,9vw,120px);line-height:1}
.hz b{font-size:20px}.hz small{color:var(--ink2);font-size:14px}
.story p{font-size:clamp(16px,1.6vw,19px);margin-bottom:14px}
.story p.eq{font-weight:800;font-size:clamp(19px,2vw,24px);color:var(--blue)}

.nf{text-align:center;padding:100px 0}
.nf .dots{margin:0 auto 20px;width:150px;padding:0}
.nf h1{font-size:40px;letter-spacing:-.04em}

@media (max-width:860px){
  .bd-top{grid-template-columns:1fr}
  .cover3d{max-width:300px;margin:0 auto}
  .ask{grid-template-columns:1fr}
}
@media (max-width:760px){
  .flt{top:62px}
  .grid-books{grid-template-columns:1fr 1fr;gap:10px}
  .spec th{width:96px}
  .acts .btn{flex:1}
  .flip .stage{aspect-ratio:210/297;padding:5%}
  .flip .pg2.l{display:none}.flip .pg2.r{width:100%;border-radius:4px}
  .flip .turn{left:5%;width:90%}
  .name{grid-template-columns:1fr 1fr}.story{grid-column:1/-1}
  .hz{padding:20px}
  .info-table th{width:110px}
}

/* 첫 화면 眞 進 카드 (heroes/*.html 공통) */
.hero .hzc{position:relative;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border:1px solid rgba(227,230,236,.9);border-radius:22px;padding:clamp(16px,2.2vw,28px);display:flex;flex-direction:column;gap:6px;box-shadow:0 30px 60px -32px rgba(20,40,110,.45)}
.hero .hzc .c{font-family:'Noto Serif KR',serif;font-weight:900;font-size:clamp(84px,9vw,136px);line-height:1;color:var(--ink);margin:4px 0 8px}
.hero .hzc>.ro{position:absolute;top:clamp(14px,1.8vw,22px);right:clamp(14px,1.8vw,22px);font:600 13px 'IBM Plex Mono',monospace;letter-spacing:.12em;color:var(--blue)}
.hero .hzc b{font-size:clamp(16px,1.5vw,20px)}.hero .hzc small{color:var(--ink2);font-size:14px}
.hero .eqline{font-weight:800;font-size:clamp(18px,1.8vw,23px);color:var(--blue);letter-spacing:-.02em}
.hx-B .wrap>.hzs{display:flex!important}.hx-C .wrap>.trio{display:grid!important}
@media (max-width:760px){.hero .hzc .c{font-size:64px}.hero .hzc{border-radius:18px}.hero .hzc small{font-size:12.5px}}