:root{
  --bg:#FFFFFF; --bg-sub:#F6F5F4; --bg-soft:#FAFAF9;
  --primary:#5645D4; --primary-hover:#4737BC; --primary-deep:#3A2A99; --primary-soft:#F0EDFF;
  --text:#202124; --text-sub:#6B6B73; --border:#E7E5E4; --border-strong:#C8C4BE;
  --success:#23865B; --warn:#B7791F; --error:#C43D3D; --disabled:#A8A6AD;
  --tint-peach:#FFE8D4; --tint-rose:#FDE0EC; --tint-mint:#D9F3E1; --tint-lav:#E6E0F5;
  --tint-sky:#DCECFA; --tint-yellow:#FEF7D6; --tint-cream:#F8F5E8;
  --r-btn:8px; --r-card:12px; --r-drop:16px; --r-pill:9999px;
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:"Pretendard Variable",Pretendard,-apple-system,system-ui,"Segoe UI",Helvetica,Arial,sans-serif;
  font-size:15.5px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.header-in{max-width:var(--max);margin:0 auto;padding:0 20px;height:64px;display:flex;align-items:center;gap:20px}
.logo{font-weight:800;font-size:19px;letter-spacing:-.4px;text-decoration:none;display:flex;align-items:center;gap:8px}
.logo-mark{width:28px;height:28px;border-radius:8px;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:800}
.logo small{font-weight:600;color:var(--text-sub);font-size:12px}
.nav{display:flex;gap:4px;margin-left:8px}
.nav a{text-decoration:none;font-size:14.5px;font-weight:600;color:var(--text-sub);padding:9px 12px;border-radius:8px}
.nav a:hover{background:var(--bg-sub);color:var(--text)}
.nav a.active{background:var(--primary-soft);color:var(--primary)}
.header-sp{flex:1}
.privacy-pill{font-size:12.5px;color:var(--text-sub);border:1px solid var(--border);border-radius:var(--r-pill);padding:6px 12px;background:var(--bg-sub);white-space:nowrap}
.menu-btn{display:none;border:1px solid var(--border);background:#fff;border-radius:8px;width:44px;height:44px;font-size:20px;cursor:pointer}
.mobile-nav{display:none;border-top:1px solid var(--border);background:#fff;padding:8px 16px 16px}
.mobile-nav a{display:block;padding:12px 8px;text-decoration:none;font-weight:600;border-radius:8px}
.mobile-nav a.active{background:var(--primary-soft);color:var(--primary)}
@media(max-width:900px){.nav,.privacy-pill{display:none}.menu-btn{display:block}.mobile-nav.open{display:block}}
/* hero */
.hero{padding:56px 0 24px;text-align:center}
.hero h1{font-size:34px;line-height:1.25;margin:0 0 12px;letter-spacing:-.6px}
.hero p.sub{color:var(--text-sub);font-size:16.5px;margin:0 auto 18px;max-width:640px}
.trust-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.trust-chip{display:inline-flex;align-items:center;gap:6px;background:var(--bg-sub);border:1px solid var(--border);border-radius:var(--r-pill);padding:7px 13px;font-size:13px;font-weight:600;color:var(--text-sub)}
@media(max-width:640px){.hero{padding:36px 0 16px}.hero h1{font-size:28px}}
/* dropzone */
.dropzone{border:2px dashed var(--border-strong);border-radius:var(--r-drop);background:var(--bg-sub);padding:36px 20px;text-align:center;transition:.15s;cursor:pointer}
.dropzone:hover{border-color:var(--primary)}
.dropzone.dragover{border-color:var(--primary);background:var(--primary-soft)}
.drop-icon{font-size:34px}
.dropzone h3{margin:10px 0 6px;font-size:18px}
.dropzone p{margin:4px 0;color:var(--text-sub);font-size:13.5px}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-btn);font-weight:700;font-size:14.5px;padding:12px 20px;min-height:44px;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:.15s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover)}
.btn-primary:disabled{background:var(--border);color:var(--disabled);cursor:not-allowed}
.btn-secondary{background:#fff;border-color:var(--border-strong);color:var(--text)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}
.btn-ghost{background:transparent;color:var(--text-sub)}
.btn-sm{padding:8px 14px;min-height:38px;font-size:13.5px}
/* cards */
.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:28px 0}
.tool-card{display:block;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:22px 20px;text-decoration:none;transition:.15s}
.tool-card:hover{border-color:var(--primary)}
.tool-card .ic{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:12px}
.tool-card h3{margin:0 0 6px;font-size:17px}
.tool-card p{margin:0 0 10px;color:var(--text-sub);font-size:13.5px}
.tool-card .go{font-size:13.5px;font-weight:700;color:var(--primary)}
@media(max-width:900px){.tool-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.tool-grid{grid-template-columns:1fr}}
/* sections */
.section{padding:40px 0}
.section h2{font-size:23px;margin:0 0 8px;letter-spacing:-.4px}
.section .desc{color:var(--text-sub);margin:0 0 20px}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.adv{background:var(--bg-sub);border:1px solid var(--border);border-radius:var(--r-card);padding:22px}
.adv h3{margin:0 0 8px;font-size:16px}
.adv p{margin:0;color:var(--text-sub);font-size:14px}
@media(max-width:800px){.adv-grid{grid-template-columns:1fr}}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.step{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:22px}
.step .n{display:inline-flex;width:30px;height:30px;border-radius:50%;background:var(--primary-soft);color:var(--primary);font-weight:800;align-items:center;justify-content:center;margin-bottom:10px}
@media(max-width:800px){.steps{grid-template-columns:1fr}}
/* faq */
.faq{border-top:1px solid var(--border)}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{width:100%;background:none;border:none;text-align:left;font-size:15.5px;font-weight:700;padding:18px 4px;cursor:pointer;display:flex;justify-content:space-between;gap:12px;font-family:inherit;color:var(--text)}
.faq-a{display:none;padding:0 4px 18px;color:var(--text-sub);font-size:14.5px}
.faq-item.open .faq-a{display:block}
/* footer */
.site-footer{border-top:1px solid var(--border);margin-top:48px;background:#fff}
.footer-in{max-width:var(--max);margin:0 auto;padding:36px 20px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px}
.footer-in h4{margin:0 0 10px;font-size:13px;color:var(--text-sub)}
.footer-in a{display:block;color:var(--text-sub);text-decoration:none;font-size:14px;padding:4px 0}
.footer-in a:hover{color:var(--primary)}
.brand-desc{color:var(--text-sub);font-size:13.5px;margin:8px 0 0}
.copy{border-top:1px solid var(--border);padding:14px 20px;text-align:center;color:var(--text-sub);font-size:12.5px}
@media(max-width:800px){.footer-in{grid-template-columns:1fr 1fr}}
/* ad slots */
.ad-slot{border:1px dashed var(--border-strong);border-radius:12px;background:var(--bg-soft);color:var(--text-sub);font-size:12.5px;text-align:center;padding:14px;margin:20px 0}
.ad-slot small{display:block;font-size:11px;letter-spacing:.6px;color:var(--disabled)}
/* guide */
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.guide-card{border:1px solid var(--border);border-radius:var(--r-card);padding:20px;text-decoration:none;background:#fff}
.guide-card:hover{border-color:var(--primary)}
.guide-card .cat{font-size:12px;font-weight:700;color:var(--primary);background:var(--primary-soft);border-radius:6px;padding:2px 8px;display:inline-block;margin-bottom:8px}
.guide-card h3{margin:0 0 6px;font-size:16px}
.guide-card p{margin:0;color:var(--text-sub);font-size:13.5px}
@media(max-width:800px){.guide-grid{grid-template-columns:1fr}}
.prose{max-width:760px}
.prose h2{margin-top:36px;font-size:21px}
.prose p,.prose li{color:#3a3b40}
.prose table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.prose th,.prose td{border:1px solid var(--border);padding:10px;text-align:left}
.prose th{background:var(--bg-sub)}
.toc{background:var(--bg-sub);border:1px solid var(--border);border-radius:12px;padding:16px 20px;margin:20px 0}
.toc a{color:var(--primary);font-size:14px}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}