/* =========================================================
   랜인투로켓 랜딩 공통 스타일
   브랜드 색상은 아래 :root 3개 값만 바꾸면 전체가 바뀝니다.
   ========================================================= */
:root{
  --brand:#ff5a5f;          /* 메인 브랜드 컬러 */
  --brand-dark:#e0484d;
  --ink:#14161c;            /* 본문 텍스트 */
  --muted:#5b6472;          /* 보조 텍스트 */
  --line:#e7eaf0;           /* 구분선 */
  --bg:#ffffff;
  --bg-soft:#f6f8fc;        /* 섹션 배경 */
  --radius:14px;
  --max:1080px;
  --font:"Pretendard","Noto Sans KR","Nanum Gothic",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* 헤더 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}
.brand img{height:28px;width:auto}
.nav{display:flex;gap:22px;font-size:15px;color:var(--muted)}
.nav a:hover{color:var(--brand)}
.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:700;padding:11px 20px;border-radius:10px;transition:.15s}
.btn:hover{background:var(--brand-dark)}
.btn-ghost{background:transparent;color:var(--brand);border:1px solid var(--brand)}
.btn-ghost:hover{background:var(--brand);color:#fff}
@media(max-width:760px){.nav{display:none}}

/* 히어로 */
.hero{background:linear-gradient(180deg,var(--bg-soft),#fff);padding:64px 0 48px}
.hero .eyebrow{color:var(--brand);font-weight:700;font-size:14px;letter-spacing:.02em;margin-bottom:12px}
.hero h1{font-size:40px;line-height:1.25;margin:0 0 16px;letter-spacing:-.02em}
.hero p.lead{font-size:19px;color:var(--muted);margin:0 0 28px;max-width:640px}
.hero .cta-row{display:flex;gap:12px;flex-wrap:wrap}
@media(max-width:760px){.hero h1{font-size:30px}.hero{padding:44px 0 32px}}

/* 섹션 */
section{padding:52px 0}
section.soft{background:var(--bg-soft)}
h2{font-size:27px;letter-spacing:-.01em;margin:0 0 10px}
h2 + .sub{color:var(--muted);margin:0 0 28px;font-size:16px}
h3{font-size:18px;margin:0 0 8px}
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:760px){.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card .ico{width:42px;height:42px;border-radius:10px;background:rgba(255,90,95,.12);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;margin-bottom:14px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card-img{border:none;color:#fff;min-height:172px;display:flex;flex-direction:column;justify-content:flex-end;background-size:cover;background-position:center;transition:transform .15s}
.card-img:hover{transform:translateY(-3px)}
.card-img h3{color:#fff}
.card-img p{margin:0;color:rgba(255,255,255,.9);font-size:15px}
.card-img .ico{background:rgba(255,255,255,.2);color:#fff}

/* 단계 */
.steps{counter-reset:step;display:grid;gap:18px}
.step{display:flex;gap:16px;align-items:flex-start}
.step .n{flex:none;width:36px;height:36px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}
.step p{margin:4px 0 0;color:var(--muted)}

/* FAQ */
.faq details{border:1px solid var(--line);border-radius:12px;padding:4px 18px;margin-bottom:10px;background:#fff}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq p{margin:0 0 16px;color:var(--muted)}

/* 관련 링크 */
.rel{display:flex;flex-wrap:wrap;gap:10px}
.rel a{border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14px;color:var(--muted)}
.rel a:hover{border-color:var(--brand);color:var(--brand)}

/* CTA 밴드 */
.band{background:#14161c;color:#fff;text-align:center;border-radius:var(--radius);padding:66px 24px;margin:8px 0;background-size:cover;background-position:center}
.band p{color:rgba(255,255,255,.9)}
.band h2{color:#fff}
.band .btn{background:#fff;color:var(--brand)}
.band .btn:hover{background:#eef2ff}

/* 푸터 */
.site-footer{border-top:1px solid var(--line);padding:36px 0;color:var(--muted);font-size:14px}
.site-footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--brand)}

.center{text-align:center}
.mt8{margin-top:8px}.mt24{margin-top:24px}