@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800&display=swap');
:root{--ink:#121826;--ink2:#253044;--muted:#667085;--muted2:#98a2b3;--blue:#3157d5;--blue2:#2447b9;--blueSoft:#eef3ff;--surface:#f6f8fb;--surface2:#fbfcfe;--line:#e5e9f0;--max:1180px;--shadow:0 22px 60px rgba(25,38,67,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",sans-serif;background:#fff;color:var(--ink);line-height:1.72;word-break:keep-all;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.wrap{max-width:var(--max);margin:auto;padding:0 24px}
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.93);backdrop-filter:blur(16px);border-bottom:1px solid rgba(229,233,240,.92)}.header-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.045em}.brand-mark{width:31px;height:31px;border-radius:9px;background:linear-gradient(135deg,#121826,#3157d5);display:grid;place-items:center;color:#fff;font-size:13px;box-shadow:0 7px 18px rgba(49,87,213,.2)}.brand-word em{font-style:normal;color:var(--blue)}.nav{display:flex;gap:4px;align-items:center;color:#3c4658;font-size:14px}.nav a{padding:9px 11px;border-radius:10px;transition:.18s}.nav a:hover{background:var(--surface);color:var(--ink)}.header-cta{padding:10px 14px;border:1px solid var(--line);border-radius:11px;font-size:13px;font-weight:700;background:#fff}.header-cta:hover{border-color:#c9d2e2;background:#fafbfc}
.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:800;letter-spacing:.09em;color:var(--blue);text-transform:uppercase;margin-bottom:16px}.eyebrow:before{content:"";width:18px;height:2px;background:currentColor;border-radius:2px}h1{font-size:clamp(40px,5vw,66px);line-height:1.08;letter-spacing:-.06em;margin:0 0 22px}h2{font-size:clamp(28px,3.1vw,40px);line-height:1.25;letter-spacing:-.045em;margin:0 0 18px}h3{font-size:20px;line-height:1.4;letter-spacing:-.025em;margin:0 0 10px}p{margin:0 0 16px}.lead{font-size:18px;line-height:1.75;color:var(--muted);max-width:790px}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:13px 17px;border-radius:12px;font-weight:750;font-size:14px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;transition:.18s}.btn:hover{transform:translateY(-1px);border-color:#cbd4e2}.btn.primary{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:0 10px 24px rgba(18,24,38,.13)}.btn.accent{background:var(--blue);border-color:var(--blue);color:#fff}.btn.accent:hover{background:var(--blue2)}
.hero{position:relative;overflow:hidden;padding:88px 0 74px;background:radial-gradient(circle at 88% 18%,rgba(49,87,213,.11),transparent 27%),radial-gradient(circle at 77% 73%,rgba(61,181,151,.08),transparent 24%),linear-gradient(#fff,#fbfcff);border-bottom:1px solid var(--line)}.home-hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(390px,.92fr);gap:70px;align-items:center}.hero-copy h1 span{color:var(--blue)}.hero-note{display:flex;align-items:center;gap:8px;margin-top:19px;color:var(--muted);font-size:13px}.hero-note i{width:7px;height:7px;background:#32a27f;border-radius:50%;box-shadow:0 0 0 4px rgba(50,162,127,.1)}
.demo-shell{position:relative;border:1px solid #dfe5ef;background:rgba(255,255,255,.9);border-radius:26px;padding:18px;box-shadow:0 28px 70px rgba(38,55,92,.12)}.demo-top{display:flex;justify-content:space-between;align-items:center;padding:3px 3px 15px}.demo-title{font-size:14px;font-weight:800}.demo-pill{font-size:10px;font-weight:800;letter-spacing:.04em;color:var(--blue);background:var(--blueSoft);padding:6px 8px;border-radius:999px}.demo-card{border:1px solid var(--line);border-radius:18px;background:#fff;padding:18px}.demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mini-field{border:1px solid var(--line);background:var(--surface2);border-radius:11px;padding:10px 11px}.mini-field small{display:block;color:var(--muted2);font-size:10px;margin-bottom:2px}.mini-field strong{font-size:14px}.demo-result{margin-top:12px;background:linear-gradient(135deg,#121826,#27344d);color:#fff;border-radius:15px;padding:17px}.demo-result small{color:#bcc6d8;font-size:11px}.demo-result .numbers{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:12px}.demo-result strong{display:block;font-size:20px;letter-spacing:-.04em}.demo-bottom{display:flex;gap:9px;margin-top:12px}.demo-bottom span{flex:1;background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:10px;text-align:center;font-size:11px;color:#596477}
.metric-rail{border-bottom:1px solid var(--line)}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr)}.metric{padding:25px 28px;border-right:1px solid var(--line)}.metric:first-child{padding-left:0}.metric:last-child{border-right:0}.metric strong{display:block;font-size:23px;letter-spacing:-.04em}.metric span{font-size:12px;color:var(--muted)}
.section{padding:72px 0}.section.alt{background:var(--surface)}.section.dark{background:var(--ink);color:#fff}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}.section-head p{max-width:520px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{position:relative;border:1px solid var(--line);border-radius:20px;padding:23px;background:#fff;transition:.2s;overflow:hidden}.card:hover{transform:translateY(-3px);border-color:#cfd6e3;box-shadow:0 15px 36px rgba(25,35,58,.07)}.card .kicker{font-size:11px;font-weight:800;color:var(--blue);letter-spacing:.05em;margin-bottom:10px}.card p{color:var(--muted);font-size:14px;margin:0}.card-arrow{position:absolute;right:18px;top:18px;width:31px;height:31px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;font-size:14px;color:var(--muted);transition:.18s}.card:hover .card-arrow{background:var(--ink);border-color:var(--ink);color:#fff}.tool-number{font-size:11px;color:var(--muted2);font-weight:800;margin-bottom:28px}.category-card{min-height:210px}.category-icon{width:42px;height:42px;border-radius:13px;background:var(--blueSoft);display:grid;place-items:center;margin-bottom:29px;color:var(--blue);font-size:15px;font-weight:800}.category-card:nth-child(2n) .category-icon{background:#eef8f5;color:#25866d}.category-card:nth-child(3n) .category-icon{background:#fff3e9;color:#b86921}
.feature-band{border:1px solid var(--line);border-radius:26px;padding:42px;background:linear-gradient(135deg,#fbfcff,#f4f7ff);display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}.feature-list{display:grid;gap:12px}.feature-item{display:flex;gap:13px;align-items:flex-start;background:#fff;border:1px solid var(--line);padding:14px 16px;border-radius:14px}.feature-dot{width:24px;height:24px;border-radius:8px;background:var(--blueSoft);color:var(--blue);display:grid;place-items:center;font-size:12px;font-weight:800;flex:0 0 auto}.feature-item strong{display:block;font-size:14px;margin-bottom:2px}.feature-item span{display:block;font-size:12px;color:var(--muted)}
.breadcrumb{font-size:12px;color:var(--muted);padding-top:22px}.article-hero{padding:42px 0 36px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fbfcff,#fff)}.article-hero h1{font-size:clamp(34px,4vw,52px)}.meta{display:flex;flex-wrap:wrap;gap:9px;font-size:12px;color:var(--muted);margin-top:14px}.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:48px;align-items:start}.article{min-width:0}.article h2{font-size:28px;margin-top:52px}.article h3{font-size:20px;margin-top:30px}.article p,.article li{color:#3e4654}.article ul,.article ol{padding-left:22px}.toc{position:sticky;top:94px;border:1px solid var(--line);border-radius:17px;padding:18px;background:#fff;box-shadow:0 8px 30px rgba(18,24,38,.04)}.toc strong{display:block;margin-bottom:10px;font-size:14px}.toc a{display:block;font-size:12px;color:var(--muted);padding:6px 0}.toc a:hover{color:var(--blue)}
.calc-box{position:relative;border:1px solid #dce3ef;background:linear-gradient(180deg,#fbfcff,#fff);border-radius:24px;padding:25px;margin:4px 0 38px;box-shadow:0 18px 44px rgba(27,39,66,.06)}.calc-box:before{content:"QUICK ESTIMATE";position:absolute;right:22px;top:19px;font-size:10px;font-weight:900;letter-spacing:.1em;color:#9aa6bc}.calc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px}.field label{display:block;font-weight:700;font-size:12px;margin-bottom:7px;color:#384152}.field input,.field select{width:100%;border:1px solid #d7deea;border-radius:12px;padding:12px 13px;background:#fff;color:var(--ink);outline:none}.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(49,87,213,.09)}.result{display:none;margin-top:18px;border-radius:16px;background:linear-gradient(135deg,#121826,#202b42);color:#fff;padding:20px}.result.show{display:block}.result .big{font-size:30px;font-weight:800;letter-spacing:-.045em}.result small{display:block;color:#bdc8da;margin-top:5px}.note{border:1px solid #dfe7f8;background:var(--blueSoft);padding:15px 16px;border-radius:12px;margin:20px 0;color:#33415c;font-size:14px}.formula-box{border:1px dashed #cfd8e8;background:#fafcff;border-radius:14px;padding:16px 18px;color:#4c5870;font-size:13px;margin:18px 0}.trust-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.trust-chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 10px;font-size:11px;color:var(--muted)}.trust-chip:before{content:"✓";font-weight:900;color:#2e9a79}.faq{border-top:1px solid var(--line);margin-top:26px}.faq details{border-bottom:1px solid var(--line);padding:15px 0}.faq summary{cursor:pointer;font-weight:700}.related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.project-hero{padding:64px 0 44px;background:linear-gradient(180deg,#f7f9ff,#fff);border-bottom:1px solid var(--line)}.project-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}.project-panel{border:1px solid var(--line);border-radius:24px;padding:25px;background:#fff;box-shadow:var(--shadow)}.project-results{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.project-stat{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:15px}.project-stat small{color:var(--muted);font-size:11px}.project-stat strong{display:block;font-size:22px;letter-spacing:-.04em;margin-top:4px}.project-stat span{font-size:11px;color:var(--muted)}
.footer{margin-top:72px;border-top:1px solid var(--line);background:#fafbfc}.footer-inner{padding:42px 24px 48px;display:grid;grid-template-columns:1.55fr 1fr 1fr;gap:34px}.footer p,.footer a{font-size:12px;color:var(--muted)}.footer-links{display:flex;flex-direction:column;gap:8px;margin-top:9px}.disclaimer{font-size:11px;color:#8f99aa;margin-top:12px;max-width:520px}
@media(max-width:920px){.nav,.header-cta{display:none}.home-hero-grid,.feature-band,.project-grid{grid-template-columns:1fr}.home-hero-grid{gap:42px}.content-layout{grid-template-columns:1fr}.toc{position:static;order:-1}.metric-grid{grid-template-columns:1fr 1fr}.metric:nth-child(2){border-right:0}.metric:nth-child(-n+2){border-bottom:1px solid var(--line)}.grid,.grid.two,.related{grid-template-columns:1fr 1fr}.footer-inner{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.wrap{padding:0 18px}.header-inner{height:64px}.hero{padding:58px 0 52px}h1{font-size:42px}.grid,.grid.two,.related,.calc-grid,.project-results{grid-template-columns:1fr}.metric{padding:19px 18px}.metric:first-child{padding-left:18px}.section{padding:52px 0}.article h2{font-size:24px}.footer-inner{grid-template-columns:1fr}.feature-band{padding:24px;gap:28px}.demo-shell{border-radius:20px}}

.editorial-byline{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:11px;font-size:11px;color:var(--muted)}
.editorial-byline b{color:var(--ink);font-weight:700}
.example-box{border:1px solid var(--line);background:#fff;border-radius:18px;padding:20px;margin:20px 0;box-shadow:0 10px 28px rgba(18,24,38,.035)}
.example-box .example-title{font-size:12px;font-weight:800;color:var(--blue);letter-spacing:.04em;margin-bottom:9px}
.example-math{font-size:15px;font-weight:700;color:var(--ink);background:var(--surface);border-radius:11px;padding:12px 14px;margin:12px 0}
.check-list{list-style:none!important;padding:0!important;margin:18px 0!important;display:grid;gap:9px}
.check-list li{position:relative;padding:12px 14px 12px 40px;border:1px solid var(--line);border-radius:12px;background:#fff;color:#3e4654}
.check-list li:before{content:'✓';position:absolute;left:14px;top:11px;width:18px;height:18px;border-radius:6px;background:var(--blueSoft);color:var(--blue);display:grid;place-items:center;font-size:11px;font-weight:900}
.warning-box{border:1px solid #f0ddc8;background:#fffaf5;border-radius:14px;padding:15px 17px;margin:19px 0;color:#624b37;font-size:14px}
.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}.info-item{border:1px solid var(--line);border-radius:14px;padding:16px;background:var(--surface2)}.info-item strong{display:block;font-size:14px;margin-bottom:5px}.info-item span{font-size:12px;color:var(--muted)}
.mini-table{width:100%;border-collapse:collapse;margin:18px 0;border:1px solid var(--line);border-radius:12px;overflow:hidden}.mini-table th,.mini-table td{padding:12px 13px;border-bottom:1px solid var(--line);text-align:left;font-size:13px}.mini-table th{background:var(--surface);color:var(--ink)}.mini-table tr:last-child td{border-bottom:0}
.article .source-note{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:16px;margin-top:24px}
@media(max-width:620px){.info-grid{grid-template-columns:1fr}}