/* ===== Plain 랜딩 리빌딩 디자인 시스템(2026-09-26) =====
   리플렛(디자인팀 2026-08-25본)의 언어를 웹으로 옮긴 단일 체계. 히어로·내비·푸터·FAQ 는 landing.css 를 그대로 쓰고,
   본문 섹션은 전부 이 파일의 .sn 체계로 짠다. 하드 룰 9: 아웃라인 카드·왼쪽 선 콜아웃 없음(soft-fill · 타이포 위계만). */
.sian{--s-max:1120px;--s-pad:clamp(20px,4vw,40px);--s-ink:#0F1B2D;--s-sub:#3B4A63;--s-mute:#5E6C85;--s-soft:#F4F8FF;--s-soft2:#EEF5FF;--s-blue:#1568DB;--s-navy:#06142F;--blue:#1568DB;}
.sian main{overflow-x:clip;}
.sian .sn{position:relative;padding:clamp(88px,12vh,150px) 0;background:#fff;}
.sian .sn.tint{background:var(--s-soft);}
.sian .sn.first{padding-top:calc(var(--nav-h,72px) + clamp(56px,8vh,96px));}
.sian .sn .wrap{max-width:var(--s-max);margin:0 auto;padding:0 var(--s-pad);position:relative;z-index:1;}
.sian .sn .wrap.narrow{max-width:820px;}

/* 헤드라인: 리플렛의 따옴표 인용 헤드(가는 1행 + 굵은 2행) */
.sian .q{position:relative;margin:0;letter-spacing:-.035em;line-height:1.16;word-break:keep-all;}
.sian .q::before{content:"\201C";position:absolute;left:0;top:-.85em;font-size:1.15em;font-weight:900;color:var(--s-ink);line-height:1;}
.sian .q .l1{display:block;font-weight:400;font-size:clamp(26px,3.2vw,40px);color:var(--s-ink);}
.sian .q .l2{display:block;font-weight:800;font-size:clamp(36px,5vw,62px);color:var(--s-ink);margin-top:.08em;}
.sian .q .l2::after{content:"\201D";font-weight:900;margin-left:.06em;}
.sian .q .b{color:var(--s-blue);}
.sian .q.center{text-align:center;}
.sian .q.center::before{position:static;display:block;margin-bottom:.1em;}
.sian .q.plain::before,.sian .q.plain .l2::after{display:none;}
.sian .lead{font-size:clamp(17px,1.65vw,20px);line-height:1.75;color:var(--s-sub);max-width:640px;margin:28px 0 0;word-break:keep-all;}
.sian .lead b{color:var(--s-ink);font-weight:700;}
.sian .lead.center{margin-inline:auto;text-align:center;}
.sian .cap{display:block;font-size:14px;color:var(--s-mute);margin-top:18px;line-height:1.6;}
.sian .tag{display:inline-block;font-size:15px;font-weight:700;color:var(--s-blue);margin-bottom:14px;}
.sian .h1{font-size:clamp(38px,5.6vw,68px);font-weight:900;letter-spacing:-.04em;line-height:1.1;color:var(--s-ink);margin:0;word-break:keep-all;}
.sian .h1 .b,.sian .h3 .b{color:var(--s-blue);}
.sian .h3{font-size:clamp(30px,3.8vw,48px);font-weight:800;letter-spacing:-.035em;line-height:1.18;color:var(--s-ink);margin:0;word-break:keep-all;}

/* 버튼: 단정한 둥근 사각 하나로 통일(알약·유리 버튼 폐기) */
.sian .btn-s{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:56px;padding:0 28px;border-radius:14px;background:var(--s-blue);color:#fff;font-weight:700;font-size:16px;letter-spacing:-.01em;transition:transform .15s ease,background .15s ease;white-space:nowrap;}
.sian .btn-s:hover{background:#125FC4;transform:translateY(-1px);}
.sian .btn-s2{background:var(--s-soft2);color:var(--s-blue);}
.sian .btn-s2:hover{background:#DDEBFF;}
.sian .btn-s--w{background:#fff;color:var(--s-navy);}
.sian .btn-s--w:hover{background:#EEF5FF;}
.sian .btn-s--g{background:rgba(255,255,255,.12);color:#fff;}
.sian .btn-s--g:hover{background:rgba(255,255,255,.2);}
.sian .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px;}
.sian .hero-slider .btn,.sian .nav .btn{border-radius:14px;}
.sian .hero-slider .btn{height:56px;padding:0 28px;font-size:16px;}
.sian .hero-slider .btn-glass{background:rgba(255,255,255,.12);border:0;}
.sian .nav .btn-sm{height:40px;padding:0 16px;border-radius:12px;}

/* 장식: 리플렛에서 가져온 소프트 블롭·크리스털 */
.sian .blob,.sian .crystal{height:auto;} /* width/height 속성(1000) 이 세로로 늘어나지 않게 */
.sian .blob{position:absolute;pointer-events:none;z-index:0;opacity:.95;}
.sian .blob.tl{left:-8%;top:-10%;width:min(46vw,560px);transform:rotate(-12deg);}
.sian .blob.br{right:-10%;bottom:-14%;width:min(50vw,620px);transform:rotate(160deg);}
.sian .blob.tr{right:-6%;top:-8%;width:min(38vw,460px);transform:rotate(80deg);}
.sian .crystal{position:absolute;pointer-events:none;z-index:0;}
.sian .crystal.sm{width:min(22vw,240px);right:4%;bottom:6%;opacity:.9;}

/* 사전(dictionary) 카드: 리플렛 p2 — soft-fill */
.sian .dict{display:inline-block;background:var(--s-soft);border-radius:20px;padding:22px 28px 24px;margin-top:30px;}
.sian .sn.tint .dict{background:#fff;}
.sian .dict .w{display:block;font-size:26px;font-weight:800;color:var(--s-ink);}
.sian .dict .w::before{content:"\2605\2605\2605";font-size:11px;color:var(--s-blue);display:block;letter-spacing:2px;margin-bottom:4px;}
.sian .dict .pos{display:block;font-size:14px;color:var(--s-blue);font-weight:700;margin-top:2px;}
.sian .dict .def{display:block;font-size:15px;color:var(--s-sub);margin-top:6px;}

/* EASY · TRUST · GROWTH */
.sian .pills{display:grid;gap:16px;margin-top:40px;max-width:600px;}
.sian .pill-row{display:grid;grid-template-columns:160px 1fr;align-items:center;gap:24px;font-size:clamp(17px,1.7vw,20px);color:var(--s-ink);font-weight:600;}
.sian .pill{display:inline-flex;justify-content:center;align-items:center;height:44px;border-radius:999px;background:var(--s-blue);color:#fff;font-weight:700;font-size:16px;letter-spacing:.06em;}
.sian .thesis{font-size:clamp(17px,1.7vw,20px);line-height:1.75;color:var(--s-sub);margin-top:44px;max-width:640px;word-break:keep-all;}
.sian .thesis b{color:var(--s-ink);}

/* 타이포 행(카드 대체): 이름 + 설명, 얇은 수평 괘선 */
.sian .rows{margin-top:clamp(28px,5vh,52px);border-top:1px solid #E3E9F2;}
.sian .row{display:grid;grid-template-columns:minmax(150px,220px) 1fr;gap:clamp(16px,3vw,40px);align-items:baseline;padding:22px 0;border-bottom:1px solid #E3E9F2;}
.sian .row .k{font-size:clamp(18px,2vw,24px);font-weight:800;color:var(--s-ink);letter-spacing:-.02em;}
.sian .row .k small{display:block;font-size:13px;font-weight:600;color:var(--s-blue);margin-top:4px;letter-spacing:0;}
.sian .row .v{font-size:clamp(15px,1.5vw,17px);line-height:1.7;color:var(--s-sub);word-break:keep-all;}
.sian .row .v b{color:var(--s-ink);}
.sian .row.num .k{color:var(--s-blue);font-size:clamp(30px,4vw,48px);font-weight:900;line-height:1;}
.sian .rows.tight .row{padding:14px 0;}

/* 체크리스트(soft-fill 블록 안 체크 행) */
.sian .checks{background:var(--s-soft);border-radius:20px;padding:26px 30px;margin-top:32px;display:grid;gap:12px;max-width:720px;}
.sian .sn.tint .checks{background:#fff;}
.sian .checks .c{display:block;font-size:13px;font-weight:700;color:var(--s-blue);letter-spacing:.02em;margin-bottom:4px;}
.sian .checks p{position:relative;display:block;padding-left:24px;margin:0;font-size:16px;line-height:1.6;color:var(--s-ink);word-break:keep-all;}
.sian .checks p::before{content:"";position:absolute;left:0;top:8px;width:10px;height:10px;border-radius:50%;background:var(--s-blue);}

/* 두 갈래 스플릿 */
.sian .split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center;}
.sian .split+.split{margin-top:clamp(72px,10vh,130px);}
.sian .split.rev .media{order:-1;}
.sian .media{position:relative;display:flex;justify-content:center;align-items:center;}
.sian .media.phone img{width:auto;max-height:min(68vh,620px);max-width:100%;filter:drop-shadow(0 34px 56px rgba(6,20,47,.28));}
.sian .media.phone.sm img{max-height:min(56vh,520px);}
.sian .media.photo img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;border-radius:24px;}
.sian .media.laptop img{width:100%;max-width:640px;height:auto;filter:drop-shadow(0 30px 50px rgba(6,20,47,.22));}

/* 벤 다이어그램(온라인 · 오프라인) */
.sian .venn{position:relative;width:min(100%,440px);aspect-ratio:440/270;margin:44px auto 0;}
.sian .venn .c{position:absolute;top:0;width:61%;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:clamp(18px,2vw,24px);}
.sian .venn .c1{left:0;border:2px solid var(--s-blue);color:var(--s-blue);background:rgba(255,255,255,.6);}
.sian .venn .c2{right:0;background:var(--s-blue);color:#fff;mix-blend-mode:multiply;opacity:.92;}

/* 숫자 4종 */
.sian .nums{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px;text-align:center;}
.sian .num b{display:block;font-size:clamp(40px,5.6vw,72px);font-weight:900;color:var(--s-blue);letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums;}
.sian .num b small{font-size:.42em;font-weight:800;margin-left:2px;}
.sian .num span{display:block;margin-top:12px;font-size:15px;font-weight:600;color:var(--s-mute);}

/* Plain School 프로그램 3종 */
.sian .prog{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:center;padding:clamp(36px,6vh,72px) 0;}
.sian .prog+.prog{border-top:1px solid #E3E9F2;}
.sian .prog.rev .pmedia{order:-1;}
.sian .pmedia{display:flex;justify-content:center;align-items:center;}
.sian .pmedia img{width:auto;max-width:100%;max-height:min(60vh,560px);height:auto;display:block;filter:drop-shadow(0 26px 44px rgba(6,20,47,.22));}
.sian .pmedia.laptop img{max-height:none;width:100%;max-width:620px;}
.sian .prog .pe{display:block;font-size:clamp(18px,2vw,24px);font-weight:500;color:var(--s-blue);opacity:.75;letter-spacing:-.01em;}
.sian .prog h3{font-size:clamp(34px,4.4vw,58px);font-weight:900;color:var(--s-blue);letter-spacing:-.035em;line-height:1.08;margin:4px 0 16px;word-break:keep-all;}
.sian .prog p{font-size:clamp(16px,1.5vw,18px);line-height:1.7;color:var(--s-sub);margin:0;word-break:keep-all;}
.sian .prog p b{color:var(--s-ink);}
.sian .sess{margin:22px 0 0;padding:0;list-style:none;display:grid;gap:6px;font-size:14px;color:var(--s-sub);}
.sian .sess li b{color:var(--s-blue);font-weight:700;margin-right:8px;font-variant-numeric:tabular-nums;}
.sian .sess .h{font-weight:800;color:var(--s-blue);font-size:15px;margin-top:8px;}
.sian .prog .link,.sian .link{display:inline-block;margin-top:22px;font-weight:700;color:var(--s-blue);}

/* 사전 신청 밴드 + 폼 */
.sian .pre{background:var(--s-soft);border-radius:28px;padding:clamp(34px,5vw,64px);display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:center;}
.sian .sn.tint .pre{background:#fff;}
.sian .pre .h3{font-size:clamp(28px,3.4vw,44px);}
.sian .pre .lead{margin-top:16px;}
.sian .form{display:grid;gap:10px;}
.sian .form input,.sian .form select{height:54px;border:0;border-radius:14px;background:var(--s-soft);padding:0 18px;font:inherit;font-size:16px;color:var(--s-ink);width:100%;}
.sian .sn.tint .form input,.sian .sn.tint .form select,.sian .pre .form input,.sian .pre .form select{background:var(--s-soft2);}
.sian .pre .form input{background:#fff;}
.sian .form input:focus,.sian .form select:focus{outline:2px solid var(--s-blue);outline-offset:0;}
.sian .form .btn-s{height:54px;width:100%;}
.sian .form .note{font-size:13px;color:var(--s-mute);margin:2px 0 0;line-height:1.5;}
.sian .form .agree{display:flex;gap:8px;align-items:flex-start;font-size:14px;color:var(--s-sub);line-height:1.5;}
.sian .form .agree input{width:18px;height:18px;margin-top:2px;flex:0 0 auto;}
.sian .form .status{font-size:14px;line-height:1.5;color:var(--s-mute);min-height:1.5em;margin:0;}
.sian .form .status.is-ok{color:#0F7A3D;font-weight:600;}
.sian .form .status.is-error{color:#C0392B;font-weight:600;}
.sian .form .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;}
.sian .fields-2{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.sian .form-card{background:var(--s-soft);border-radius:28px;padding:clamp(28px,4vw,48px);}
.sian .form label.lb{display:block;font-size:14px;font-weight:700;color:var(--s-ink);margin:8px 0 6px;}

/* 요금 행(타이포, 카드 없음) */
.sian .plans{margin-top:clamp(28px,5vh,52px);border-top:1px solid #E3E9F2;}
.sian .plan{display:grid;grid-template-columns:minmax(120px,180px) minmax(140px,220px) 1fr;gap:clamp(14px,3vw,40px);align-items:baseline;padding:24px 0;border-bottom:1px solid #E3E9F2;}
.sian .plan .n{font-size:clamp(20px,2.2vw,26px);font-weight:800;color:var(--s-ink);}
.sian .plan .n small{display:block;font-size:13px;color:var(--s-blue);font-weight:700;margin-top:4px;}
.sian .plan .p{font-size:clamp(22px,2.6vw,32px);font-weight:900;color:var(--s-blue);letter-spacing:-.02em;font-variant-numeric:tabular-nums;}
.sian .plan .p small{font-size:.5em;font-weight:700;color:var(--s-mute);margin-left:4px;}
.sian .plan .d{font-size:15px;line-height:1.7;color:var(--s-sub);}

/* 파트너 칩·저니 */
.sian .chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;}
.sian .chip{display:inline-flex;align-items:center;height:44px;padding:0 18px;border-radius:999px;background:var(--s-soft);color:var(--s-ink);font-weight:700;font-size:15px;}
.sian .journey{margin-top:clamp(28px,5vh,52px);display:grid;gap:0;}
.sian .jrow{display:grid;grid-template-columns:110px 1fr;gap:clamp(16px,3vw,40px);align-items:baseline;padding:26px 0;border-top:1px solid #E3E9F2;}
.sian .jrow .n{font-size:clamp(40px,5vw,64px);font-weight:900;color:var(--s-blue);opacity:.35;line-height:1;letter-spacing:-.04em;font-variant-numeric:tabular-nums;}
.sian .jrow .t{font-size:clamp(20px,2.4vw,28px);font-weight:800;color:var(--s-ink);letter-spacing:-.02em;}
.sian .jrow .d{font-size:16px;line-height:1.7;color:var(--s-sub);margin-top:6px;word-break:keep-all;}

/* 사진 띠 */
.sian .band{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:clamp(28px,5vh,52px);}
.sian .band img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:18px;}

/* 닫는 섹션: 리플렛 뒷면(도입 문의)의 조용한 톤 */
.sian .close{position:relative;background:var(--s-navy);color:#fff;padding:clamp(96px,14vh,150px) 0 clamp(300px,44vh,480px);overflow:hidden;}
.sian .close__wave{position:absolute;left:0;right:0;bottom:0;width:100%;height:clamp(240px,38vh,420px);object-fit:cover;object-position:center 45%;opacity:.95;pointer-events:none;-webkit-mask-image:linear-gradient(to bottom,transparent 0,#000 42%);mask-image:linear-gradient(to bottom,transparent 0,#000 42%);}
.sian .close .wrap{text-align:center;}
.sian .close .tag{color:#7FB4FF;}
.sian .close h2{margin:0;font-size:clamp(32px,4.6vw,56px);font-weight:800;letter-spacing:-.035em;line-height:1.16;color:#fff;word-break:keep-all;}
.sian .close p{margin:20px auto 0;font-size:clamp(16px,1.6vw,19px);line-height:1.7;color:rgba(255,255,255,.72);max-width:560px;word-break:keep-all;}
.sian .close .cta-row{justify-content:center;}

/* 보조 유틸(인라인 style 금지 원칙) */
.sian .mt{margin-top:clamp(56px,8vh,96px);}
.sian .mt-sm{margin-top:clamp(40px,6vh,72px);}
.sian .split.top{align-items:start;}
.sian .media.phone.flat img{max-height:none;width:100%;max-width:560px;}
.sian .row .k.mute{color:var(--s-mute);font-weight:600;text-decoration:line-through;text-decoration-color:rgba(107,122,147,.45);text-decoration-thickness:2px;}
.sian .lb .req{color:var(--s-blue);font-weight:800;font-size:12px;margin-left:4px;}
.sian .lb .opt{color:var(--s-mute);font-weight:600;font-size:12px;margin-left:4px;}
.sian .form textarea{border:0;border-radius:14px;background:var(--s-soft2);padding:14px 18px;font:inherit;font-size:16px;color:var(--s-ink);width:100%;resize:vertical;min-height:140px;}
.sian .form textarea:focus{outline:2px solid var(--s-blue);outline-offset:0;}
.sian .form .status a,.sian .cap a{color:var(--s-blue);font-weight:700;}
.sian .checks p b{font-weight:800;}
.sian .prog .tag{margin:0 0 10px;font-size:14px;}
.sian .prog .cta-row{margin-top:20px;}
.sian .thesis .b{color:var(--s-blue);}
.sian .sn.first .blob.tr{top:0;}
.sian .wrap.narrow .cta-row{margin-top:30px;}
.sian .h1 .b{color:var(--s-blue);}
.sian .close .cta-row{margin-top:34px;}
.sian .split.top .journey{margin-top:clamp(20px,3vh,32px);}
.sian .split.top .checks{margin-top:clamp(20px,3vh,32px);}

@media (max-width:900px){
  .sian .prog,.sian .pre,.sian .fields-2{grid-template-columns:1fr;}
  .sian .prog.rev .pmedia{order:0;}
  .sian .nums{grid-template-columns:repeat(2,1fr);}
  .sian .pill-row{grid-template-columns:130px 1fr;gap:14px;}
  .sian .media.phone img{max-height:52vh;}
  .sian .blob.tl,.sian .blob.br,.sian .blob.tr{width:70vw;}
  .sian .row{grid-template-columns:1fr;gap:6px;}
  .sian .plan{grid-template-columns:1fr 1fr;}
  .sian .plan .d{grid-column:1/-1;}
  .sian .band{grid-template-columns:1fr 1fr;}
  .sian .jrow{grid-template-columns:70px 1fr;}
}
@media (prefers-reduced-motion:reduce){.sian .btn-s{transition:none;}}

/* ===== 2026-10-08 점검 반영 레이어(반응형 · 컴포넌트 통일, 점검표 A1~A8 · B1~B6) ===== */
/* A8 태블릿 세로(761~900px)는 좌우 2열 유지, 760px 이하만 1열 */
@media (min-width:761px) and (max-width:900px){
  .sian .h1{font-size:38px;}
  .sian .h3{font-size:30px;}
  .sian .split{gap:clamp(20px,3.4vw,34px);}
  .sian .media.phone img{max-height:46vh;}
  .sian .media.phone.flat img{max-width:100%;}
}
@media (max-width:760px){
  .sian .split{grid-template-columns:1fr;}
  .sian .split.rev .media{order:0;}
}
/* A1 모바일 히어로 폰 비율: 폭을 64%로 덮던 규칙을 폰만 되돌림(높이 기준 · 폭 자동) */
.sian .hero-slide__visual--phone img{width:auto;}
/* A2 늘어남 방지: 폭을 줄이는 폰은 높이를 자동으로 */
.sian .media.phone img,.sian .media.phone.flat img{height:auto;}
/* A3 터치 영역: 터치 폭(1023px 이하)에서 점 44px · 화살표 44px, 보이는 선은 2px 유지 */
@media (max-width:1023px){
  .sian .hero-dot{padding:21px 0;box-sizing:content-box;background-clip:content-box;}
  .sian .hero-arrow{width:44px;height:44px;}
}
/* A4 태블릿 가로(높이 820px 이하)에서는 폰을 낮춰 점 · 화살표와 겹치지 않게 */
@media (min-width:761px) and (max-width:1180px) and (max-height:820px){
  .sian .hero-slide__visual--phone img{height:min(62svh,540px);}
}
/* A5 사진 띠: 900px 이하에서 첫 장 전폭 + 나머지 두 장 나란히(홀로 남는 한 장 없음) */
@media (max-width:900px){
  .sian .band{grid-template-columns:1fr 1fr;}
  .sian .band img:first-child{grid-column:1/-1;aspect-ratio:16/9;}
}
/* A6 작은 터치 대상 44px */
.sian .nav-logo{min-height:44px;}
.sian .link{display:inline-flex;align-items:center;min-height:44px;margin-top:6px;}
@media (max-width:1023px){
  .sian .footer-col a{padding:11px 0;}
}
/* A7 각주: 줄 사이 숨 쉬게 */
.sian .cap{line-height:1.75;}
@media (max-width:640px){.sian .cap{font-size:13px;}}
/* 요금 행의 작은 단위(원/월)는 12px 아래로 내려가지 않게 */
.sian .plan .p small{font-size:max(.5em,12px);}

/* B1 버튼 한 체계: 헤더 · 히어로 · 폼 · 본문 모두 납작한 단색 · 굵기 700 · 높이 56/40 · 모서리 14/12 */
.sian .btn{font-weight:700;letter-spacing:-.01em;box-shadow:none;}
.sian .btn-primary{background:var(--s-blue);box-shadow:none;}
.sian .btn-primary:hover{background:#125FC4;}
.sian .btn-white{box-shadow:none;color:var(--s-navy);}
.sian .btn-white:hover{background:#EEF5FF;}
.sian .btn-lg{min-height:56px;}
.sian .btn-sm{min-height:40px;padding:0 16px;}
.sian .nav:not(.nav--over) .btn-ghost{background:var(--s-soft2);border-color:transparent;color:var(--s-blue);}
.sian .nav:not(.nav--over) .btn-ghost:hover{background:#DDEBFF;}
.sian .form .btn-s{height:56px;}
/* B3 히어로 글라스 버튼도 같은 모서리 · 굵기(고래 그래픽과 제목 척도는 그대로) */
.sian .hero-slider .btn-glass{font-weight:700;}
/* B4 닫는 섹션(남색) 아래 푸터 경계 */
.sian .footer{box-shadow:inset 0 1px 0 rgba(255,255,255,.14);}
/* B5 소제목 한 크기: 히어로 eyebrow 도 .tag 와 같게(프로그램 이름 위 .pe 는 리플렛 스타일 예외) */
.sian .ts-eyebrow{font-size:15px;font-weight:700;letter-spacing:0;}
/* B6 FAQ 마커를 본문 톤에 맞춰 단순화(동그란 테두리 제거) */
.sian .faq-q .pm{border:0;background:none;width:32px;height:32px;font-size:26px;color:var(--s-blue);}
.sian .faq-q:hover .pm,.sian .faq-item.open .faq-q .pm{background:none;border:0;}

/* 소제목(.tag) 바로 아래 따옴표 제목은 따옴표 장식이 소제목과 겹치지 않게 간격 */
.sian .tag + .q:not(.plain){margin-top:1.15em;}

/* ===== 2026-10-09 추가 개선: 방침·약관, 푸터 채널, 소개서 버튼, 404 ===== */
.sian .legal .lh{font-size:clamp(20px,2.2vw,24px);font-weight:800;letter-spacing:-.025em;color:var(--s-ink);margin:48px 0 14px;}
.sian .legal p{font-size:16px;line-height:1.85;color:var(--s-sub);margin:0 0 12px;word-break:keep-all;}
.sian .legal .rows{margin-top:8px;margin-bottom:14px;}
.sian .legal .row .k{font-size:16px;}
.sian .lnk{color:var(--s-blue);text-decoration:underline;text-underline-offset:3px;}
.sian .intro-cta{margin-top:18px;}
.sian .footer .fb-legal{color:inherit;text-decoration:underline;text-underline-offset:3px;}
.sian .nf{min-height:100svh;display:grid;place-items:center;text-align:center;padding:96px var(--s-pad,24px);background:#fff;}
.sian .nf .code{font-size:clamp(72px,16vw,140px);font-weight:900;letter-spacing:-.05em;line-height:1;color:var(--s-blue);}
.sian .nf .h3{margin-top:12px;}
.sian .nf .lead{margin:18px auto 0;}
.sian .nf .cta-row{justify-content:center;margin-top:30px;}
.sian .nf .nf-logo{display:inline-block;margin-bottom:34px;}
.sian .nf .nf-logo img{height:30px;width:auto;}
.sian .checks p.intro-cta{padding-left:0;margin-top:16px;}
.sian .checks p.intro-cta::before{display:none;}

/* ===== 2026-10-09 대표 요청 2차: 가운데 정렬 헤드는 따옴표 없음, 제품 로고, 파트너 슬라이드, 요금제 선택, 내비 보조 버튼 ===== */
.sian .q.center::before,.sian .q.center .l2::after,.sian .close .wrap h2::before,.sian .close .wrap h2::after{content:none;display:none;}
.sian .prod-logo{display:block;height:36px;width:auto;margin:0 0 22px;}
@media (max-width:760px){.sian .prod-logo{height:28px;}}
.sian .nav:not(.nav--over) .btn-ghost{background:#EEF2F8;color:#0F1B2D;}
.sian .nav:not(.nav--over) .btn-ghost:hover{background:#E1E7F0;}
/* 파트너 로고 슬라이드 */
.sian .logo-marquee{overflow:hidden;margin-top:36px;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);}
.sian .logo-track{display:flex;width:max-content;animation:logo-slide 18s linear infinite;}
.sian .logo-marquee:hover .logo-track{animation-play-state:paused;}
.sian .logo-set{display:flex;align-items:center;gap:clamp(48px,7vw,96px);padding:0 clamp(24px,3.5vw,48px);margin:0;list-style:none;}
.sian .logo-item{display:flex;flex-direction:column;align-items:center;gap:12px;flex:0 0 auto;}
.sian .logo-item img{width:auto;max-width:none;filter:grayscale(1);opacity:.8;}
.sian .logo-item span{font-size:13px;font-weight:600;color:var(--s-mute);white-space:nowrap;}
@keyframes logo-slide{to{transform:translateX(-33.3333%);}}
@media (prefers-reduced-motion:reduce){.sian .logo-track{animation:none;width:auto;flex-wrap:wrap;justify-content:center;}.sian .logo-set[aria-hidden="true"]{display:none;}}
/* 요금제: 먼저 서비스 선택 */
.sian .pr-tabs{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:36px;}
.sian .pr-tab{display:flex;flex-direction:column;align-items:flex-start;gap:6px;text-align:left;padding:24px 26px;border-radius:20px;background:var(--s-soft);border:0;color:var(--s-ink);font:inherit;cursor:pointer;transition:background .15s ease,transform .15s ease;}
.sian .pr-tab img{height:24px;width:auto;margin-bottom:6px;}
.sian .pr-tab b{font-size:20px;font-weight:800;letter-spacing:-.02em;}
.sian .pr-tab span{font-size:15px;color:var(--s-sub);}
.sian .pr-tab:hover{background:var(--s-soft2);}
.sian .pr-tab.is-on{background:var(--s-navy);color:#fff;}
.sian .pr-tab.is-on span{color:rgba(255,255,255,.78);}
.sian .pr-tab.is-on img{filter:brightness(0) invert(1);}
.sian .pr-tab:focus-visible{outline:3px solid var(--s-blue);outline-offset:2px;}
@media (max-width:600px){.sian .pr-tabs{grid-template-columns:1fr;}}
.js-tabs .pane[hidden]{display:none;}

/* ===== 2026-10-14: 푸터 사업자 정보·모바일 푸터 2열·고정 CTA·슬라이드 정지 ===== */
.sian .footer .footer-biz{font-size:12px;line-height:1.7;color:rgba(255,255,255,.62);padding-top:22px;margin-top:22px;border-top:1px solid rgba(255,255,255,.12);word-break:keep-all;}
@media (max-width:600px){
  .sian .footer-cols{display:grid;grid-template-columns:1fr 1fr;gap:28px 20px;}
}
.sian .m-cta{display:none;}
@media (max-width:760px){
  .sian .m-cta{display:flex;gap:10px;position:fixed;left:0;right:0;bottom:0;z-index:60;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 -8px 24px rgba(15,27,45,.10);transform:translateY(110%);transition:transform .25s ease;}
  .sian .m-cta.on{transform:none;}
  .sian .m-cta a{flex:1;height:48px;font-size:15px;border-radius:12px;padding:0 12px;}
  .sian body.has-mcta,.sian.has-mcta{padding-bottom:0;}
}
.sian .logo-pause{display:block;margin:14px auto 0;padding:10px 16px;border:0;border-radius:999px;background:var(--s-soft);color:var(--s-sub);font:inherit;font-size:13px;font-weight:600;cursor:pointer;min-height:44px;}
.sian .logo-pause:hover{background:var(--s-soft2);}
.sian .logo-marquee.is-paused .logo-track{animation-play-state:paused;}
@media (prefers-reduced-motion:reduce){.sian .logo-pause{display:none;}}

/* ===== 2026-10-18: 푸터 정리 · 폼 버튼/체크/선택 칸 통일 ===== */
/* 푸터: 구분선 하나, 사업자 정보 → 연락·고지 순으로 같은 간격 */
.sian .footer .footer-top{margin-bottom:0;}
.sian .footer .footer-biz{border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding:26px 0 0;font-size:12.5px;line-height:1.8;color:rgba(255,255,255,.62);}
.sian .footer .footer-bottom{border-top:0;padding-top:10px;margin-top:0;}
@media (max-width:600px){
  .sian .footer .footer-biz{margin-top:36px;padding-top:22px;}
}
/* 버튼: 브라우저 기본 테두리·글꼴 제거(옛 버튼 모양 정리) */
.sian button.btn-s{border:0;-webkit-appearance:none;appearance:none;font-family:inherit;cursor:pointer;}
.sian .btn-s:active{transform:translateY(0) scale(.99);}
.sian .btn-s:focus-visible{outline:3px solid rgba(21,104,219,.4);outline-offset:3px;}
.sian .btn-s:disabled{opacity:.6;cursor:not-allowed;transform:none;}
/* 선택 칸(select): 기본 화살표 대신 Plain 화살표 */
.sian .form select,.sian .sn.tint .form select,.sian .pre .form select{-webkit-appearance:none;appearance:none;cursor:pointer;padding-right:46px;background-repeat:no-repeat;background-position:right 18px center;background-size:18px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235E6C85' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");}
/* 체크 표시: Plain 체크 디자인(둥근 사각 · 선택하면 파랑 + 흰 체크) */
.sian .form .agree{gap:12px;align-items:flex-start;padding:12px 14px;border-radius:14px;background:var(--s-soft);cursor:pointer;transition:background .15s ease;}
.sian .sn.tint .form .agree,.sian .pre .form .agree{background:var(--s-soft2);}
.sian .form .agree:hover{background:var(--s-soft2);}
.sian .form .agree input[type=checkbox]{-webkit-appearance:none;appearance:none;flex:0 0 auto;width:24px;height:24px;margin:0;padding:0;border:0;border-radius:8px;background-color:#fff;background-repeat:no-repeat;background-position:center;background-size:16px;box-shadow:inset 0 0 0 2px #B3C0D6;cursor:pointer;transition:background-color .15s ease,box-shadow .15s ease,transform .15s ease;}
.sian .form .agree input[type=checkbox]:hover{box-shadow:inset 0 0 0 2px var(--s-blue);}
.sian .form .agree input[type=checkbox]:checked{background-color:var(--s-blue);box-shadow:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.6 4.6L19 7.6'/%3E%3C/svg%3E");transform:scale(1.02);}
.sian .form .agree input[type=checkbox]:focus-visible{outline:3px solid rgba(21,104,219,.4);outline-offset:2px;}
.sian .form .agree span{padding-top:2px;}
.sian .form .agree.is-error,.sian .sn.tint .form .agree.is-error,.sian .pre .form .agree.is-error{background:#FFF1EF;}
.sian .form .agree.is-error input[type=checkbox]:not(:checked){box-shadow:inset 0 0 0 2px #D04B3D;}
/* 어두운 섹션(닫는 섹션·푸터) 위를 지날 때 내비가 회색빛으로 비치지 않게 흰색으로 고정 */
.sian .nav:not(.nav--over){background:#fff;-webkit-backdrop-filter:none;backdrop-filter:none;}

/* ===== 2026-10-19: Plain School · Plain AI 구조 개편 ===== */
/* Plain AI 네 가지 과정 카드(테두리 없는 연한 면) */
.sian .lines{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(14px,2vw,22px);margin-top:clamp(28px,5vh,48px);}
.sian .line{display:flex;flex-direction:column;background:var(--s-soft);border-radius:24px;padding:clamp(24px,3vw,36px);}
.sian .sn.tint .line{background:#fff;}
.sian .line .no{font-size:14px;font-weight:800;color:var(--s-blue);letter-spacing:.04em;font-variant-numeric:tabular-nums;}
.sian .line h3{font-size:clamp(24px,2.6vw,32px);font-weight:900;color:var(--s-ink);letter-spacing:-.03em;line-height:1.22;margin:10px 0 6px;word-break:keep-all;}
.sian .line .who{font-size:15px;font-weight:700;color:var(--s-blue);margin:0 0 14px;}
.sian .line p{font-size:16px;line-height:1.7;color:var(--s-sub);margin:0;word-break:keep-all;}
.sian .line .meta{margin-top:auto;padding-top:20px;font-size:14px;font-weight:600;color:var(--s-mute);}
.sian .cta-row.center{justify-content:center;margin-top:clamp(28px,4vh,40px);}
.sian .cap.center{text-align:center;}
@media (max-width:760px){.sian .lines{grid-template-columns:1fr;}}
/* 메인 두 기둥: Plain AI 과정 목록(괘선만) */
.sian .ai-mini{list-style:none;margin:0;padding:clamp(22px,3vw,34px);width:100%;max-width:520px;background:var(--s-soft);border-radius:24px;counter-reset:l;}
.sian .ai-mini li{display:flex;align-items:baseline;gap:14px;padding:18px 0;border-bottom:1px solid #E3E9F2;counter-increment:l;}
.sian .ai-mini li:first-child{padding-top:4px;}
.sian .ai-mini li:last-child{border-bottom:0;padding-bottom:4px;}
.sian .ai-mini li::before{content:counter(l,decimal-leading-zero);font-size:14px;font-weight:800;color:var(--s-blue);font-variant-numeric:tabular-nums;}
.sian .ai-mini b{font-size:clamp(17px,1.7vw,21px);font-weight:800;color:var(--s-ink);letter-spacing:-.02em;word-break:keep-all;}
.sian .ai-mini span{margin-left:auto;padding-left:12px;font-size:14px;color:var(--s-mute);text-align:right;white-space:nowrap;}
@media (max-width:600px){.sian .ai-mini li{flex-wrap:wrap;gap:4px 12px;}.sian .ai-mini span{margin-left:30px;padding-left:0;text-align:left;width:100%;}}
/* 히어로 슬라이드: 노트북 목업 */
.sian .hero-slide__visual--laptop img{width:min(100%,620px);height:auto;max-height:none;filter:drop-shadow(0 34px 60px rgba(2,8,23,.55));}
@media (max-width:760px){.sian .hero-slide__visual--laptop img{width:min(88%,360px);}}

/* ===== 2026-10-19 4차: 푸터 사업자 정보 줄 나눔 · 입력 칸 구분 · 문구 없는 닫는 섹션 ===== */
.sian .footer .footer-biz p{margin:0;display:flex;flex-wrap:wrap;gap:6px 0;}
.sian .footer .footer-biz p+p{margin-top:6px;}
.sian .footer .footer-biz .bi{display:inline-flex;align-items:baseline;gap:8px;}
.sian .footer .footer-biz .bi+.bi::before{content:"";display:inline-block;width:1px;height:11px;margin:0 14px;background:rgba(255,255,255,.22);align-self:center;}
.sian .footer .footer-biz em{font-style:normal;color:rgba(255,255,255,.42);}
@media (max-width:600px){.sian .footer .footer-biz p{flex-direction:column;gap:4px;}.sian .footer .footer-biz .bi+.bi::before{display:none;}}
/* 입력 칸: 바탕은 흰색, 칸은 연한 파랑으로 구분 */
.sian .form-card{background:#fff;padding-left:0;padding-right:0;}
.sian .form input,.sian .form select,.sian .form textarea,.sian .sn.tint .form input,.sian .sn.tint .form select,.sian .pre .form input,.sian .pre .form select{background-color:var(--s-soft2);}
.sian .form .agree,.sian .sn.tint .form .agree,.sian .pre .form .agree{background:var(--s-soft);}
/* 닫는 섹션: 제목 없이 버튼만 */
.sian .close .wrap>.cta-row:first-child{margin-top:0;}
.sian .close{padding-top:clamp(72px,10vh,110px);padding-bottom:clamp(240px,36vh,400px);}

/* ===== 2026-10-19 6차: 모바일·태블릿 점검 ===== */
/* 메뉴 버튼이 하나가 된 뒤 햄버거 폭에서 가운데로 뜨던 것: 오른쪽(햄버거 옆)에 붙인다 */
.sian .nav-right{margin-left:auto;}
/* 태블릿·모바일 폭에서 장식 크리스털이 본문 글자를 가리던 것: 1023px 이하에서는 숨긴다 */
@media (max-width:1023px){.sian .crystal.sm{display:none;}}
/* "배움은 이어져요" 원: 좁은 폭에서 "오프라인" 글자가 왼쪽 원 테두리에 걸리던 것, 글자를 겹치지 않는 쪽으로 옮긴다 */
.sian .venn .c1{padding-right:20%;}
.sian .venn .c2{padding-left:20%;}
@media (max-width:600px){.sian .venn .c{font-size:16px;}}
/* ===== 2026-10-20: 푸터 안내 문구 줄 나눔(연락처는 사업자 정보 3번째 줄로, 고지·저작권은 각각 한 줄) ===== */
.sian .footer .footer-bottom{margin-top:22px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);}
.sian .footer .footer-bottom p{margin:0;font-size:12px;line-height:1.75;color:rgba(255,255,255,.5);max-width:820px;}
.sian .footer .footer-bottom .fcopy{margin-top:10px;color:rgba(255,255,255,.42);}
/* ===== 2026-10-20: 맨 아래 영역 = 시안 C(크리스털 고래 사진을 영역 전체 바탕으로, 위쪽 흐림 없음) ===== */
.sian .close{background:#121318;}
.sian .close__wave{top:0;bottom:0;height:100%;object-position:center 60%;opacity:1;-webkit-mask-image:none;mask-image:none;}
.sian .close .wrap{position:relative;z-index:1;}

/* ===== 2026-10-20: 회사소개 첫 화면 크리스털 고래(1.5배 · 메인 히어로처럼 떠 있고 빛이 흐름) ===== */
.sian .about-hero{grid-template-columns:1.25fr 1fr;}
.sian .about-whale{position:relative;width:min(100%,360px);aspect-ratio:1;justify-self:center;animation:ab-float 7s ease-in-out infinite;filter:drop-shadow(0 28px 48px rgba(21,104,219,.22));}
.sian .about-whale img{display:block;width:100%;height:100%;object-fit:contain;}
.sian .ab-sheen{position:absolute;inset:0;pointer-events:none;mix-blend-mode:multiply;opacity:.75;
  background:radial-gradient(30% 24% at var(--shx,50%) var(--shy,40%),rgba(120,170,255,.75),rgba(66,157,255,.3) 46%,rgba(66,157,255,0) 72%);
  -webkit-mask-image:url("gen/deco-crystal.webp");mask-image:url("gen/deco-crystal.webp");
  -webkit-mask-size:contain;mask-size:contain;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-position:center;mask-position:center;
  animation:pg-sheen-sweep 8s ease-in-out infinite alternate;}
@keyframes ab-float{0%,100%{translate:0 0;rotate:0deg;}50%{translate:0 -16px;rotate:-2deg;}}
@media (max-width:900px){.sian .about-hero{grid-template-columns:1fr;}.sian .about-whale{width:min(64vw,270px);margin-top:4px;}}
@media (prefers-reduced-motion:reduce){.sian .about-whale,.sian .ab-sheen{animation:none;}}

/* ===== 2026-10-20: 반응형 완성 점검(11페이지 × 11폭) ===== */
/* 터치 화면이면 폭과 상관없이(태블릿 가로 1024~1180 포함) 메뉴 링크·헤더 버튼·히어로 점·화살표·푸터 링크를 44px로 */
@media (pointer:coarse){
  .sian .nav-link{display:inline-flex;align-items:center;min-height:44px;}
  .sian .nav .btn{min-height:44px;}
  .sian .hero-dot{padding:21px 0;box-sizing:content-box;background-clip:content-box;}
  .sian .hero-arrow{width:44px;height:44px;}
  .sian .footer-col a{padding:11px 0;}
}
/* 동의 칸 안 "개인정보 수집·이용" 링크: 줄 높이는 그대로, 누르는 영역만 위아래로 넓힌다 */
.sian .agree .lnk{padding:14px 0;}
/* 문단 끝 줄에 "요." · "다." 한 글자만 넘어가던 것(문의 페이지 접수 안내 · 고지) */
.sian p{text-wrap:pretty;}
/* 404 로고 링크 44px */
.sian .nf .nf-logo{display:inline-flex;align-items:center;min-width:44px;min-height:44px;}
/* 한글이 단어 중간에서 끊기던 것(푸터 고지·각주·FAQ 답변·요금 행·폼 안내 등): 사이트 전체를 어절 단위 줄바꿈으로. 긴 주소·메일은 overflow-wrap 으로 넘침 방지 */
body.sian{word-break:keep-all;overflow-wrap:break-word;}
/* 회사소개 "두 갈래" 행: 문장 안 "살펴보기 →" 링크가 44px 블록이 되어 줄 간격이 벌어지던 것. 글줄 안에서는 인라인, 누르는 영역만 위아래로 */
.sian .row .v .link{display:inline;min-height:0;margin-top:0;padding:14px 0;white-space:nowrap;}
/* 같은 흰 바탕 섹션이 이어질 때(문의 첫 화면→안내·폼→FAQ, Plain edu 요금→사전 신청→FAQ) 위아래 여백이 겹쳐 빈 화면처럼 보이던 것: 뒤 섹션 위 여백을 줄인다 */
.sian .sn:not(.tint)+.sn:not(.tint){padding-top:clamp(16px,3vh,40px);}
/* 맨 아래 영역: 글자·버튼이 밝은 빛줄기 위에 걸리면(1440·1920 제목, 768 버튼) 읽기 어려워서, 글자 뒤에만 옅은 어둠을 깐다(상자·테두리 없음) */
.sian .close .wrap::before{content:"";position:absolute;left:50%;top:50%;width:min(760px,100%);height:calc(100% + 120px);transform:translate(-50%,-50%);z-index:-1;pointer-events:none;background:radial-gradient(closest-side,rgba(18,19,24,.72),rgba(18,19,24,.38) 60%,rgba(18,19,24,0));}
.sian .close h2{text-shadow:0 2px 18px rgba(0,0,0,.55);}
/* 2026-10-20: 회사소개 고래 커서 따라가기 · 안쪽 층(.aw-in)이 커서를, 바깥(.about-whale)이 떠 있는 움직임을 맡는다 */
.sian .about-whale{perspective:900px;}
.sian .aw-in{position:absolute;inset:0;display:block;transform-style:preserve-3d;will-change:transform;}
.sian .about-whale.is-follow .ab-sheen{animation:none;}
/* 2026-10-20: 메뉴 링크를 로고와 도입 문의 버튼 사이 가운데로(메뉴가 보이는 941px 이상) */
@media (min-width:941px){.sian .nav-links{flex:1;justify-content:center;}.sian .nav-right{margin-left:0;}}
/* 2026-10-24: 회사소개 로고 띠를 바로 위 "두 갈래" 내용과 살짝 띄움 */
.sian #products .logo-marquee{margin-top:clamp(40px,6vw,72px);}

/* 2026-10-24 랜딩 점검 시안 01·13: 맨 아래 남색 영역은 제목+버튼을 가운데에, 플루 소개 한 줄 */
.sian .close{padding:clamp(110px,15vh,150px) 0 clamp(120px,17vh,170px);}
.sian .plu-note{display:flex;align-items:center;gap:14px;margin:0 0 16px;}
.sian .plu-note img{width:72px;height:auto;flex:none;}
.sian .plu-note span{font-size:15px;line-height:1.55;color:var(--s-ink-2,#4B5563);word-break:keep-all;}
.sian .plu-note b{color:var(--s-ink,#0B1220);}
@media (max-width:600px){.sian .plu-note img{width:60px}.sian .plu-note span{font-size:14px}}