:root{
  --navy:#0b2150; --blue:#1a6fd1; --sky:#35a1ee; --bg:#f3f7fb; --text:#1c2433; --muted:#5d6b82; --line:#dfe5ef;
  --topbar-h:40px; --header-h:84px; --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Pretendard","Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",sans-serif;color:var(--text);line-height:1.6;background:#fff;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
img{max-width:100%;display:block}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
svg{display:block}
.inner{width:100%;max-width:1280px;margin:0 auto;padding:0 32px}
.eyebrow{color:var(--sky);font-weight:800;letter-spacing:.16em;font-size:14px;margin-bottom:14px}

/* topbar */
.topbar{position:absolute;inset:0 0 auto 0;height:var(--topbar-h);z-index:60;background:rgba(0,0,0,.72);color:#dfe7f5;font-size:13px}
.topbar__inner{height:100%;display:flex;align-items:center;justify-content:space-between;padding:0 32px;gap:24px}
.topbar__notice{display:flex;align-items:center;gap:14px;min-width:0}
.topbar__notice b{color:#7fd0ff;font-weight:700;white-space:nowrap;flex:none}
.topbar__notice span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar__notice time{opacity:.55;white-space:nowrap}
.topbar__notice:hover span{text-decoration:underline}
.ctrl{display:flex;align-items:center;gap:6px;white-space:nowrap}
.ctrl button{width:24px;height:24px;border-radius:50%;font-size:16px;line-height:1;display:grid;place-items:center;color:#fff;transition:background .2s}
.ctrl button:hover{background:rgba(255,255,255,.18)}
.ctrl__toggle{font-size:9px!important}
.ctrl__count{margin-left:8px;opacity:.8}
.ctrl__count b{color:#fff}

/* header (transparent over visual) */
.header{position:absolute;top:var(--topbar-h);left:0;right:0;height:var(--header-h);z-index:55;color:#fff;transition:background .3s,box-shadow .3s,color .3s}
.header__inner{height:100%;padding:0 32px;display:flex;align-items:center;gap:56px}
.logo{position:relative;display:block}
.logo img{height:64px;width:auto}
.logo__color{position:absolute;left:0;top:0;opacity:0}
.gnb{flex:1}
.gnb ul{display:flex;justify-content:center;gap:56px}
.gnb a{display:block;padding:10px 4px;font-size:18px;font-weight:700;position:relative}
.gnb a::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:currentColor;transform:scaleX(0);transition:transform .25s var(--ease)}
.gnb a:hover::after{transform:scaleX(1)}
.util{display:flex;align-items:center;gap:6px}
.util button{width:40px;height:40px;display:grid;place-items:center;border-radius:50%;transition:background .2s}
.util button:hover{background:rgba(255,255,255,.16)}
.util svg{width:22px;height:22px}
.util__quote{margin-right:10px;padding:8px 20px;border-radius:999px;background:#fff;color:var(--navy);font-weight:700;font-size:14px;transition:background .2s,color .2s}
.util__quote:hover{background:var(--sky);color:#fff}
/* sticky solid state */
.header.is-solid{position:fixed;top:0;background:#fff;color:var(--text);box-shadow:0 2px 16px rgba(11,33,80,.12)}
.header.is-solid .logo__white{opacity:0}
.header.is-solid .logo__color{opacity:1}
.header.is-solid .util button:hover{background:var(--bg)}
.header.is-solid .util__quote{background:var(--navy);color:#fff}
.header.is-solid .util__quote:hover{background:var(--blue)}

/* gnb dropdown */
.gnb>ul>li{position:relative}
.gnb .sub{display:grid;gap:2px;position:absolute;top:100%;left:50%;min-width:210px;padding:10px;border-radius:14px;background:#fff;color:var(--text);box-shadow:0 14px 40px rgba(11,33,80,.18);opacity:0;visibility:hidden;transform:translate(-50%,8px);transition:opacity .2s,transform .2s var(--ease),visibility 0s .2s}
.gnb li:hover>.sub,.gnb li:focus-within>.sub{opacity:1;visibility:visible;transform:translate(-50%,0);transition-delay:0s}
.gnb .sub a{padding:10px 14px;border-radius:8px;font-size:15px;font-weight:600;white-space:nowrap}
.gnb .sub a::after{display:none}
.gnb .sub a:hover{background:var(--bg);color:var(--blue)}
.header.is-solid .gnb li.is-current>a{color:var(--blue)}
.header.is-solid .gnb li.is-current>a::after{transform:scaleX(1)}

/* visual */
.visual{position:relative;height:100vh;min-height:680px;overflow:hidden;background:#050d22;color:#fff}
.slides,.slide{position:absolute;inset:0}
.slide:nth-child(1){--bg:url(../images/hero1.svg)}.slide:nth-child(2){--bg:url(../images/hero2.svg)}.slide:nth-child(3){--bg:url(../images/hero3.svg)}
.slide{background:var(--bg) center/cover no-repeat;opacity:0;visibility:hidden;transform:scale(1.06);transition:opacity 1s var(--ease),transform 7s linear,visibility 0s 1s}
.slide::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,10,30,.78) 0%,rgba(3,10,30,.35) 55%,rgba(3,10,30,0) 100%),linear-gradient(0deg,rgba(3,10,30,.6),rgba(3,10,30,0) 40%)}
.slide.is-active{opacity:1;visibility:visible;transform:scale(1);transition:opacity 1s var(--ease),transform 7s linear,visibility 0s}
.slide__txt{position:absolute;left:max(32px,calc((100vw - 1280px)/2 + 32px));top:calc(var(--topbar-h) + var(--header-h) + 14vh);max-width:720px}
.slide__txt>*{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.slide.is-active .slide__txt>*{opacity:1;transform:none}
.slide.is-active .slide__txt>:nth-child(2){transition-delay:.15s}
.slide.is-active .slide__txt>:nth-child(3){transition-delay:.3s}
.slide__sub{font-size:clamp(16px,1.6vw,22px);letter-spacing:.06em;margin-bottom:14px;color:#dbe9ff}
.slide h1,.slide h2{font-size:clamp(44px,6vw,84px);font-weight:800;line-height:1.15;letter-spacing:-.02em;margin-bottom:18px}
.slide__en{font-size:clamp(16px,1.6vw,22px);opacity:.9}

/* quick panel */
.quick{position:absolute;left:50%;bottom:48px;transform:translateX(-50%);width:min(1260px,calc(100% - 64px));z-index:5;padding:14px 20px;border-radius:22px;background:rgba(8,18,48,.62);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.12)}
.quick__grid{display:grid;grid-template-columns:repeat(4,1fr)}
.quick a{display:flex;align-items:center;justify-content:center;gap:16px;padding:22px 12px;font-size:19px;font-weight:700;border-radius:14px;transition:background .25s,transform .25s var(--ease)}
.quick a:hover{background:rgba(255,255,255,.14);transform:translateY(-3px)}
.quick svg{width:40px;height:40px;color:#cfe6ff;flex:none}

/* floating buttons */
.float{position:absolute;right:0;top:50%;transform:translateY(-10%);z-index:6;display:grid;gap:8px;text-align:center}
.float a{display:grid;place-items:center;width:84px;height:84px;border-radius:14px 0 0 14px;font-weight:800;font-size:14px;line-height:1.3;transition:width .25s var(--ease)}
.float a:hover{width:96px}
.float__a{background:var(--sky);color:#fff}
.float__b{background:#0e2a66;color:#fff}

/* about */
.about{position:relative;padding:120px 0;color:#fff;background:#071a3c url(../images/about-bg.svg) center/cover no-repeat;overflow:hidden}
.about__inner{display:grid;grid-template-columns:1fr 1.2fr;gap:80px;align-items:center}
.about h2{font-size:clamp(30px,3.4vw,46px);line-height:1.3;font-weight:800;letter-spacing:-.02em}
.about__text{font-size:18px;line-height:1.85;color:#d3e2f8;margin-bottom:36px}
.more{display:inline-flex;align-items:center;gap:14px;padding:16px 30px;border:1.5px solid rgba(255,255,255,.7);border-radius:999px;font-weight:700;transition:background .25s,color .25s}
.more span{transition:transform .25s var(--ease)}
.more:hover{background:#fff;color:var(--navy)}
.more:hover span{transform:translateX(5px)}

/* inquiry */
.inquiry{padding:120px 0;background:var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Ccircle cx='2' cy='2' r='1.4' fill='%231a6fd1' fill-opacity='.12'/%3E%3C/svg%3E")}
.inquiry__inner{display:grid;grid-template-columns:1fr 1.6fr;gap:72px;align-items:start}
.inquiry h2{font-size:clamp(30px,3.4vw,46px);color:var(--navy);font-weight:800;margin-bottom:18px}
.inquiry__head>p:not(.eyebrow){color:var(--muted);font-size:17px}
.inquiry__tel{margin-top:36px;padding:24px 28px;background:#fff;border-radius:16px;border-left:5px solid var(--sky);box-shadow:0 8px 24px rgba(11,33,80,.07);color:var(--text)!important;display:grid;gap:2px}
.inquiry__tel b{font-size:30px;color:var(--navy);letter-spacing:.02em}
.inquiry__tel small{color:var(--muted)}
.form{background:#fff;padding:44px;border-radius:20px;box-shadow:0 16px 48px rgba(11,33,80,.1);display:grid;gap:20px}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form label{display:grid;gap:8px;font-weight:700;font-size:14px}
.form label i{color:#d93025;font-style:normal}
.form input[type=text],.form input[type=tel],.form input[type=email],.form select,.form textarea{width:100%;padding:14px 16px;border:1px solid var(--line);border-radius:10px;font:inherit;font-weight:400;background:#fafcff;transition:border-color .2s,box-shadow .2s}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--sky);box-shadow:0 0 0 4px rgba(53,161,238,.18);background:#fff}
.form textarea{resize:vertical}
.form__agree{display:flex!important;align-items:center;gap:8px;font-weight:400!important;color:var(--muted)}
.form__agree a{text-decoration:underline;color:var(--blue)}
.submit{padding:18px;border-radius:12px;background:linear-gradient(90deg,var(--navy),var(--blue));color:#fff;font-weight:800;font-size:17px;transition:filter .2s,transform .2s}
.submit:hover{filter:brightness(1.12);transform:translateY(-2px)}

/* footer */
.footer{background:#0a1630;color:#9fb0cc;font-size:14px;padding:0 0 48px}
.footer__links{display:flex;gap:32px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.footer__links a:hover{color:#fff}
.footer__links b{color:#fff}
.footer__body{display:flex;align-items:center;gap:40px;padding-top:34px}
.footer__logo{height:56px;width:auto;opacity:.9}
.footer address{font-style:normal;display:grid;gap:4px}
.footer__copy{margin-top:8px;opacity:.6}

/* responsive */
@media (max-width:1100px){
  .gnb ul{gap:28px}.header__inner{gap:24px}
  .quick__grid{grid-template-columns:repeat(4,1fr)}
  .quick a{flex-direction:column;gap:8px;font-size:16px;padding:16px 6px;text-align:center;word-break:keep-all}
  .about__inner,.inquiry__inner{grid-template-columns:1fr;gap:36px}
}
@media (max-width:768px){
  :root{--header-h:64px}
  .topbar__notice time,.ctrl__count{display:none}
  .topbar__inner,.header__inner,.inner{padding-left:18px;padding-right:18px}
  .logo img{height:48px}
  .util__quote,.util button:first-of-type{display:none}
  .header__inner{justify-content:space-between}
  .gnb{display:none;position:fixed;left:0;right:0;top:calc(var(--topbar-h) + var(--header-h));max-height:calc(100vh - var(--topbar-h) - var(--header-h));overflow:auto;background:#fff;color:var(--text);padding:8px 18px 24px;box-shadow:0 14px 30px rgba(11,33,80,.18)}
  .header.is-solid .gnb{top:var(--header-h);max-height:calc(100vh - var(--header-h))}
  .nav-open .gnb{display:block}
  .gnb ul{flex-direction:column;gap:0}
  .gnb>ul>li{border-bottom:1px solid var(--line)}
  .gnb>ul>li>a{padding:16px 4px;font-size:17px}
  .gnb>ul>li>a::after{display:none}
  .gnb .sub{justify-content:start;justify-items:start;position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;padding:0 0 12px 12px;min-width:0}
  .gnb .sub a{padding:8px 4px;font-weight:500;color:var(--muted)}
  .quick a{text-align:center;word-break:keep-all}
  .visual{min-height:620px}
  .slide__txt{left:18px;right:18px;top:calc(var(--topbar-h) + var(--header-h) + 8vh)}
  .quick{bottom:16px;width:calc(100% - 24px);padding:8px}
  .quick a{padding:12px 4px;font-size:13px}
  .quick svg{width:30px;height:30px}
  .float{display:none}
  .about,.inquiry{padding:72px 0}
  .form{padding:26px}.form__row{grid-template-columns:1fr}
  .footer__body{flex-direction:column;align-items:flex-start;gap:16px}
  .footer__links{flex-wrap:wrap;gap:14px 22px}
}
@media (prefers-reduced-motion:reduce){
  .slide,.slide__txt>*{transition:none}
}