*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;
  background:#080c13;
  color:#fff;
  font-family:"Apple SD Gothic Neo","Malgun Gothic",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit}
.container{width:min(1180px,calc(100% - 48px));margin:0 auto}

/* HEADER */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(8,12,19,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.header-wrap{
  width:min(1180px,calc(100% - 48px));
  min-height:74px;margin:0 auto;
  display:flex;align-items:center;gap:28px;
}
.header-logo{
  text-decoration:none;font-size:20px;font-weight:800;
  letter-spacing:-.04em;white-space:nowrap;
}
.header-logo span{color:#c5ff2f;margin-left:5px;font-size:12px;letter-spacing:.08em}
.header-nav{margin-left:auto;display:flex;align-items:center;gap:26px}
.header-nav a{
  position:relative;text-decoration:none;color:rgba(255,255,255,.58);
  font-size:13px;font-weight:600;transition:.2s;
}
.header-nav a:hover,.header-nav a.is-current{color:#fff}
.header-nav a::after{
  content:"";position:absolute;left:0;bottom:-9px;
  width:0;height:1px;background:#c5ff2f;transition:width .2s;
}
.header-nav a:hover::after,.header-nav a.is-current::after{width:100%}
.header-main{
  display:inline-flex;align-items:center;gap:8px;padding:11px 14px;
  border:1px solid rgba(255,255,255,.1);
  text-decoration:none;color:rgba(255,255,255,.82);font-size:12px;font-weight:700;
}
.header-menu{
  display:none;margin-left:auto;width:42px;height:42px;
  border:1px solid rgba(255,255,255,.1);
  background:transparent;color:#fff;font-size:18px;
}
.header-mobile{display:none}

/* HERO */
.hero{
  position:relative;padding:108px 0 42px;overflow:hidden;
  background:
    radial-gradient(circle at 83% 20%,rgba(197,255,47,.08),transparent 28%),
    linear-gradient(rgba(255,255,255,.012) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.012) 1px,transparent 1px),
    #080c13;
  background-size:auto,56px 56px,56px 56px,auto;
}
.hero::after{
  content:"";position:absolute;left:50%;bottom:0;
  width:min(1180px,calc(100% - 48px));height:1px;
  transform:translateX(-50%);
  background:linear-gradient(90deg,transparent,rgba(197,255,47,.22),transparent);
}
.breadcrumb{
  display:flex;gap:10px;margin-bottom:68px;
  color:rgba(255,255,255,.3);font-size:10px;font-weight:700;letter-spacing:.16em;
}
.breadcrumb a{text-decoration:none;color:rgba(255,255,255,.42)}
.hero-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:90px;align-items:end;
}
.hero-kicker{
  display:inline-flex;align-items:center;gap:12px;margin-bottom:24px;
  color:#c5ff2f;font-size:12px;font-weight:800;letter-spacing:.16em;
}
.hero-kicker::before{content:"";width:34px;height:1px;background:#c5ff2f}
h1{
  margin:0;font-size:clamp(56px,6.2vw,86px);
  line-height:1.04;letter-spacing:-.06em;word-break:keep-all;
}
h1 span{color:#c5ff2f}
.hero-main p{
  max-width:690px;margin:32px 0 0;color:rgba(255,255,255,.54);
  font-size:16px;line-height:1.95;word-break:keep-all;
}
.hero-panel{
  border:1px solid rgba(255,255,255,.08);
  background:rgba(255,255,255,.018);
}
.panel-label{
  padding:17px 20px;border-bottom:1px solid rgba(255,255,255,.08);
  color:#c5ff2f;font-size:10px;font-weight:800;letter-spacing:.16em;
}
.panel-stat{
  display:flex;justify-content:space-between;align-items:end;
  gap:20px;padding:22px 20px;border-bottom:1px solid rgba(255,255,255,.07);
}
.panel-stat:last-child{border-bottom:0}
.panel-stat strong{font-size:36px;line-height:1;color:#fff;font-weight:700}
.panel-stat span{color:rgba(255,255,255,.42);font-size:11px}
.hero-bottom{
  display:flex;justify-content:space-between;gap:20px;
  margin-top:70px;padding:18px 0 0;
  color:rgba(255,255,255,.3);font-size:10px;font-weight:700;letter-spacing:.08em;
}

/* TOC */
.toc{padding:78px 0;background:#0c1119}
.toc-grid{display:grid;grid-template-columns:260px 1fr;gap:70px}
.toc-title span{
  display:block;margin-bottom:14px;color:#c5ff2f;
  font-size:10px;font-weight:800;letter-spacing:.18em;
}
.toc-title strong{
  display:block;font-size:28px;line-height:1.35;letter-spacing:-.04em;
}
.toc-links{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid rgba(255,255,255,.08)}
.toc-links a{
  display:grid;grid-template-columns:42px 1fr;gap:14px;align-items:center;
  min-height:68px;padding:0 18px 0 0;
  border-bottom:1px solid rgba(255,255,255,.08);
  text-decoration:none;color:rgba(255,255,255,.64);
  transition:.2s;
}
.toc-links a:nth-child(odd){border-right:1px solid rgba(255,255,255,.08)}
.toc-links a:hover{color:#fff;background:rgba(255,255,255,.015)}
.toc-links span{color:#c5ff2f;font-size:10px;font-weight:800}
.toc-links b{font-size:13px;font-weight:600}

/* READING */
.overview{padding:112px 0;background:#080c13}
.reading-grid{
  display:grid;grid-template-columns:190px minmax(0,790px);
  gap:70px;align-items:start;
}
.side-label span{
  display:block;color:#c5ff2f;font-size:10px;font-weight:800;letter-spacing:.18em;
}
.side-label small{
  display:block;margin-top:14px;color:rgba(255,255,255,.18);
  font-size:34px;font-weight:700;
}
.reading .lead{
  margin:0;color:rgba(255,255,255,.9);
  font-size:24px;line-height:1.75;letter-spacing:-.028em;word-break:keep-all;
}
.reading .lead strong{color:#c5ff2f}
.reading p{
  margin:20px 0 0;color:rgba(255,255,255,.5);
  font-size:15px;line-height:1.95;word-break:keep-all;
}
.underline{
  color:rgba(255,255,255,.86);font-weight:600;
  text-decoration-line:underline;text-decoration-color:rgba(197,255,47,.68);
  text-decoration-thickness:1px;text-underline-offset:4px;
}

/* PRINCIPLE */
.principle{padding:0 0 116px;background:#080c13}
.principle-card{
  padding:52px 54px;border:1px solid rgba(197,255,47,.17);
  background:linear-gradient(135deg,rgba(197,255,47,.045),rgba(255,255,255,.01));
}
.principle-head{
  display:flex;justify-content:space-between;gap:40px;align-items:end;
  padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.08);
}
.principle-head span{color:#c5ff2f;font-size:10px;font-weight:800;letter-spacing:.18em}
.principle-head h2{
  margin:0;font-size:34px;letter-spacing:-.04em;line-height:1.3;text-align:right;
}
.principle-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.principle-grid article{
  min-height:220px;padding:30px 24px 0;
  border-right:1px solid rgba(255,255,255,.08);
}
.principle-grid article:first-child{padding-left:0}
.principle-grid article:last-child{border-right:0;padding-right:0}
.principle-grid .num{color:rgba(255,255,255,.22);font-size:10px;font-weight:800}
.principle-grid h3{margin:50px 0 12px;font-size:20px;letter-spacing:-.03em}
.principle-grid p{margin:0;color:rgba(255,255,255,.43);font-size:13px;line-height:1.78}

/* HEAD */
.types,.timing,.matrix,.case-study,.check,.faq{padding:116px 0}
.types,.matrix,.faq{background:#080c13}
.timing,.check{background:#0c1119}
.section-head{
  display:flex;justify-content:space-between;align-items:end;
  gap:60px;margin-bottom:52px;
}
.section-head span{
  display:block;margin-bottom:14px;color:#c5ff2f;
  font-size:10px;font-weight:800;letter-spacing:.18em;
}
.section-head h2{margin:0;font-size:37px;line-height:1.2;letter-spacing:-.045em}
.section-head p{
  max-width:440px;margin:0;color:rgba(255,255,255,.42);
  font-size:14px;line-height:1.8;
}

/* TYPES */
.type-list{border-top:1px solid rgba(255,255,255,.1)}
.type-card{
  display:grid;grid-template-columns:120px 1fr;
  gap:42px;padding:54px 0;border-bottom:1px solid rgba(255,255,255,.08);
}
.type-card.featured{
  margin:0 -28px;padding:54px 28px;
  background:linear-gradient(90deg,rgba(197,255,47,.035),transparent 55%);
}
.type-number{
  color:rgba(255,255,255,.16);font-size:52px;font-weight:700;
  letter-spacing:-.05em;line-height:1;
}
.type-top{display:flex;justify-content:space-between;align-items:flex-start;gap:28px}
.eyebrow{
  display:block;margin-bottom:10px;color:#c5ff2f;
  font-size:10px;font-weight:800;letter-spacing:.16em;
}
.type-top h3{margin:0;font-size:36px;letter-spacing:-.04em}
.status{
  padding:8px 10px;border:1px solid rgba(197,255,47,.17);
  color:#c5ff2f;font-size:10px;font-weight:700;white-space:nowrap;
}
.type-lead{
  max-width:780px;margin:24px 0 0;color:rgba(255,255,255,.54);
  font-size:15px;line-height:1.9;word-break:keep-all;
}
.type-detail{
  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:30px;
}
.type-detail div{
  min-height:108px;padding:18px;border:1px solid rgba(255,255,255,.07);
  background:rgba(255,255,255,.012);
}
.type-detail span{
  display:block;color:rgba(255,255,255,.27);
  font-size:10px;font-weight:700;letter-spacing:.08em;
}
.type-detail strong{
  display:block;margin-top:24px;color:rgba(255,255,255,.82);
  font-size:13px;line-height:1.5;
}
.type-note{
  display:grid;grid-template-columns:170px 1fr;gap:26px;
  margin-top:18px;padding:18px 0 0;border-top:1px dashed rgba(255,255,255,.08);
}
.type-note b{color:#c5ff2f;font-size:11px}
.type-note p{margin:0;color:rgba(255,255,255,.4);font-size:13px;line-height:1.75}

/* TIMING */
.timing-track{
  position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
  padding-top:28px;
}
.timing-track::before{
  content:"";position:absolute;left:0;right:0;top:5px;height:1px;
  background:linear-gradient(90deg,#c5ff2f,rgba(197,255,47,.2));
}
.timing-track article{position:relative;padding:24px 24px 0 0}
.timing-dot{
  position:absolute;top:-28px;left:0;width:11px;height:11px;border-radius:50%;
  background:#c5ff2f;box-shadow:0 0 0 6px rgba(197,255,47,.08);
}
.timing-code{color:#c5ff2f;font-size:10px;font-weight:800;letter-spacing:.13em}
.timing-track h3{margin:28px 0 12px;font-size:26px;letter-spacing:-.035em}
.timing-track p{margin:0;color:rgba(255,255,255,.48);font-size:13px;line-height:1.8}
.timing-track ul{list-style:none;padding:0;margin:24px 0 0}
.timing-track li{
  position:relative;padding:9px 0 9px 16px;
  border-bottom:1px solid rgba(255,255,255,.06);
  color:rgba(255,255,255,.38);font-size:12px;
}
.timing-track li::before{
  content:"";position:absolute;left:0;top:16px;width:4px;height:4px;border-radius:50%;background:#c5ff2f;
}

/* MATRIX */
.matrix-wrap{overflow-x:auto;border-top:1px solid rgba(255,255,255,.1)}
.matrix table{width:100%;min-width:860px;border-collapse:collapse}
.matrix th,.matrix td{
  padding:20px 17px;text-align:left;border-bottom:1px solid rgba(255,255,255,.075);
}
.matrix th{
  color:rgba(255,255,255,.28);font-size:10px;font-weight:800;letter-spacing:.12em;
}
.matrix td{color:rgba(255,255,255,.56);font-size:13px;line-height:1.6}
.matrix td:first-child{color:#fff;font-weight:700}
.level{
  display:inline-block;min-width:46px;padding:6px 8px;text-align:center;
  border:1px solid rgba(255,255,255,.08);font-size:10px;font-weight:700;
}
.level.high{color:#c5ff2f;border-color:rgba(197,255,47,.2)}
.level.mid{color:rgba(255,255,255,.7)}

/* CASE */
.case-study{background:#0c1119}
.case-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:80px;align-items:start}
.case-copy span{color:#c5ff2f;font-size:10px;font-weight:800;letter-spacing:.18em}
.case-copy h2{margin:18px 0 20px;font-size:38px;line-height:1.22;letter-spacing:-.045em}
.case-copy p{margin:0;color:rgba(255,255,255,.43);font-size:14px;line-height:1.85}
.case-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.case-cards article{
  padding:28px;border:1px solid rgba(255,255,255,.08);
  background:rgba(255,255,255,.012);
}
.case-head{display:flex;justify-content:space-between;align-items:end;gap:18px}
.case-head span{color:rgba(255,255,255,.27);font-size:10px;font-weight:800}
.case-head strong{color:#c5ff2f;font-size:28px}
.case-cards dl{margin:28px 0 0}
.case-cards dl div{
  display:flex;justify-content:space-between;gap:30px;
  padding:12px 0;border-bottom:1px solid rgba(255,255,255,.06);
}
.case-cards dt{color:rgba(255,255,255,.32);font-size:12px}
.case-cards dd{margin:0;color:rgba(255,255,255,.78);font-size:12px;font-weight:600}
.case-bottom{
  display:grid;grid-template-columns:90px 1fr;gap:22px;
  margin-top:18px;padding:20px 22px;border:1px solid rgba(197,255,47,.13);
}
.case-bottom b{color:#c5ff2f;font-size:11px}
.case-bottom p{margin:0;color:rgba(255,255,255,.5);font-size:13px;line-height:1.75}

/* CHECK */
.check-shell{
  display:grid;grid-template-columns:.82fr 1.18fr;gap:80px;
  padding:58px;border:1px solid rgba(197,255,47,.18);
  background:linear-gradient(135deg,rgba(197,255,47,.045),rgba(255,255,255,.012));
}
.check-intro span{
  display:block;color:#c5ff2f;font-size:10px;font-weight:800;
  letter-spacing:.18em;margin-bottom:18px;
}
.check-intro h2{margin:0;font-size:36px;line-height:1.22;letter-spacing:-.04em}
.check-intro p{margin:18px 0 0;color:rgba(255,255,255,.42);font-size:13px;line-height:1.8}
.check-list{border-top:1px solid rgba(255,255,255,.1)}
.check-row{
  display:grid;grid-template-columns:44px 1fr 32px;gap:16px;
  align-items:center;min-height:74px;border-bottom:1px solid rgba(255,255,255,.08);
}
.check-row .n{color:rgba(255,255,255,.22);font-size:10px;font-weight:700}
.check-row strong{display:block;color:rgba(255,255,255,.83);font-size:14px}
.check-row p{margin:4px 0 0;color:rgba(255,255,255,.3);font-size:11px}
.check-row i{
  width:28px;height:28px;display:grid;place-items:center;
  border:1px solid rgba(197,255,47,.24);border-radius:50%;
  color:#c5ff2f;font-size:11px;font-style:normal;
}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:320px 1fr;gap:80px}
.faq-head span{display:block;color:#c5ff2f;font-size:10px;font-weight:800;letter-spacing:.18em;margin-bottom:16px}
.faq-head h2{margin:0;font-size:38px;letter-spacing:-.04em}
.faq-list{border-top:1px solid rgba(255,255,255,.1)}
.faq-list article{padding:28px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.faq-list h3{margin:0 0 11px;font-size:18px;letter-spacing:-.025em}
.faq-list p{margin:0;color:rgba(255,255,255,.47);font-size:14px;line-height:1.85;word-break:keep-all}

/* RELATED */
.related{padding:86px 0 132px;background:#080c13;border-top:1px solid rgba(255,255,255,.05)}
.related-card{
  display:flex;justify-content:space-between;align-items:center;gap:50px;
  min-height:220px;padding:44px 48px;border:1px solid rgba(255,255,255,.09);
  background:linear-gradient(145deg,rgba(255,255,255,.02),rgba(255,255,255,.008));
  text-decoration:none;transition:.25s;
}
.related-card:hover{transform:translateY(-3px);border-color:rgba(197,255,47,.3)}
.related-card>div>span{
  display:block;margin-bottom:15px;color:#c5ff2f;
  font-size:10px;font-weight:800;letter-spacing:.18em;
}
.related-card h2{margin:0 0 10px;font-size:38px;letter-spacing:-.04em}
.related-card p{margin:0;color:rgba(255,255,255,.42);font-size:14px}
.related-arrow{
  width:58px;height:58px;flex:0 0 auto;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.14);border-radius:50%;color:#c5ff2f;font-size:22px;
}

/* FOOTER */
footer{padding:55px 0 30px;background:#070a0f;border-top:1px solid rgba(255,255,255,.06)}
.footer-top{display:flex;justify-content:space-between;gap:50px;padding-bottom:40px}
.footer-brand a{text-decoration:none;font-weight:800}
.footer-brand a span{color:#c5ff2f}
.footer-brand p{max-width:390px;margin:14px 0 0;color:rgba(255,255,255,.35);font-size:12px;line-height:1.8}
.footer-nav{display:flex;flex-wrap:wrap;gap:18px 24px;align-content:flex-start}
.footer-nav a{text-decoration:none;color:rgba(255,255,255,.48);font-size:12px;font-weight:600}
.footer-bottom{
  display:flex;justify-content:space-between;gap:20px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.06);color:rgba(255,255,255,.25);font-size:10px;
}

/* RESPONSIVE */
@media(max-width:980px){
  .hero-layout,.check-shell{grid-template-columns:1fr}
  .hero-panel{max-width:560px}
  .toc-grid{grid-template-columns:1fr}
  .principle-grid{grid-template-columns:1fr 1fr}
  .principle-grid article{border-right:0;border-bottom:1px solid rgba(255,255,255,.08);padding:28px 20px}
  .principle-grid article:first-child{padding-left:20px}
  .principle-grid article:last-child{border-bottom:0}
  .type-detail{grid-template-columns:1fr}
  .timing-track{grid-template-columns:1fr;gap:52px}
  .timing-track::before{display:none}
  .timing-dot{top:0}
  .timing-track article{padding-top:32px}
  .case-layout{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr;gap:44px}
}
@media(max-width:768px){
  .header-nav,.header-main{display:none}
  .header-menu{display:block}
  .header-mobile{display:none;width:calc(100% - 40px);margin:0 auto;padding-bottom:18px}
  .header-mobile.active{display:grid;gap:8px}
  .header-mobile a{
    padding:12px 0;text-decoration:none;color:rgba(255,255,255,.72);
    font-size:13px;border-bottom:1px solid rgba(255,255,255,.06);
  }
  .container,.header-wrap{width:calc(100% - 40px)}
  .hero{padding:82px 0 34px}
  .breadcrumb{margin-bottom:44px}
  h1{font-size:44px}
  .hero-main p{font-size:14px}
  .hero-bottom{flex-direction:column}
  .toc,.overview,.types,.timing,.matrix,.case-study,.check,.faq{padding:76px 0}
  .toc-links{grid-template-columns:1fr}
  .toc-links a:nth-child(odd){border-right:0}
  .reading-grid{grid-template-columns:1fr;gap:24px}
  .reading .lead{font-size:20px}
  .principle{padding-bottom:76px}
  .principle-card{padding:30px 24px}
  .principle-head{display:block}
  .principle-head h2{margin-top:18px;font-size:29px;text-align:left}
  .principle-grid{grid-template-columns:1fr}
  .section-head{display:block}
  .section-head h2{font-size:34px}
  .section-head p{margin-top:18px}
  .type-card,.type-card.featured{
    grid-template-columns:1fr;margin:0;padding:44px 0;gap:22px;
  }
  .type-number{font-size:34px}
  .type-top h3{font-size:30px}
  .type-note{grid-template-columns:1fr;gap:8px}
  .case-cards{grid-template-columns:1fr}
  .check-shell{padding:32px 24px}
  .check-intro h2{font-size:31px}
  .related{padding:68px 0 96px}
  .related-card{padding:32px 26px}
  .related-card h2{font-size:30px}
  .footer-top{flex-direction:column}
  .footer-bottom{flex-direction:column}
}
@media(max-width:480px){
  h1{font-size:38px}
  .hero-kicker{font-size:10px}
  .type-top{display:block}
  .status{display:inline-block;margin-top:12px}
  .reading p,.type-lead{font-size:14px}
  .check-row{grid-template-columns:34px 1fr 28px;gap:10px}
  .related-card{align-items:flex-end}
  .related-card p{display:none}
  .related-arrow{width:48px;height:48px}
}