*{box-sizing:border-box}
html{scroll-behavior:smooth}
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(12px);
    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 118px;overflow:hidden;
    background:
        radial-gradient(circle at 82% 25%,rgba(197,255,47,.075),transparent 29%),
        #080c13;
}
.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(255,255,255,.13),transparent);
}
.breadcrumb{
    display:flex;gap:10px;margin-bottom:62px;
    color:rgba(255,255,255,.32);font-size:10px;font-weight:700;letter-spacing:.16em;
}
.breadcrumb a{text-decoration:none;color:rgba(255,255,255,.42)}
.hero-grid{
    display:grid;grid-template-columns:minmax(0,1fr) 340px;
    gap:80px;align-items:end;
}
.kicker{
    display:inline-flex;align-items:center;gap:12px;
    margin-bottom:24px;color:#c5ff2f;font-size:12px;font-weight:800;letter-spacing:.16em;
}
.kicker::before{content:"";width:34px;height:1px;background:#c5ff2f}
h1{
    margin:0;max-width:900px;
    font-size:clamp(52px,6vw,82px);line-height:1.08;
    letter-spacing:-.055em;word-break:keep-all;
}
h1 span{color:#c5ff2f}
.hero-copy>p{
    max-width:720px;margin:30px 0 0;
    color:rgba(255,255,255,.54);font-size:16px;line-height:1.95;word-break:keep-all;
}
.hero-meta{border-top:1px solid rgba(255,255,255,.12)}
.meta-row{
    display:grid;grid-template-columns:78px 1fr;gap:20px;
    padding:18px 0;border-bottom:1px solid rgba(255,255,255,.08);
}
.meta-row span{color:rgba(255,255,255,.28);font-size:10px;font-weight:700;letter-spacing:.14em}
.meta-row strong{color:rgba(255,255,255,.78);font-size:12px;line-height:1.6}

/* SUMMARY */
.summary{
    padding:88px 0;background:#0c1119;
}
.summary-card{
    display:grid;grid-template-columns:.82fr 1.18fr;gap:70px;
    padding:54px 58px;border:1px solid rgba(197,255,47,.2);
    background:linear-gradient(135deg,rgba(197,255,47,.04),rgba(255,255,255,.012));
}
.summary-label{color:#c5ff2f;font-size:11px;font-weight:800;letter-spacing:.18em}
.summary-card h2{
    margin:18px 0 0;font-size:40px;line-height:1.22;letter-spacing:-.04em;
}
.summary-copy p{
    margin:0;color:rgba(255,255,255,.58);
    font-size:15px;line-height:1.95;word-break:keep-all;
}
.summary-copy p+p{margin-top:18px}
.summary-copy strong{color:#c5ff2f}

/* OVERVIEW */
.overview{padding:100px 0;background:#080c13}
.reading-grid{
    display:grid;grid-template-columns:190px minmax(0,790px);
    gap:70px;align-items:start;
}
.side-label span{
    color:#c5ff2f;font-size:10px;font-weight:800;
    letter-spacing:.18em;white-space:nowrap;
}
.reading .lead{
    margin:0;color:rgba(255,255,255,.9);
    font-size:23px;line-height:1.75;letter-spacing:-.025em;word-break:keep-all;
}
.reading .lead strong{color:#c5ff2f}
.reading p{
    margin:20px 0 0;color:rgba(255,255,255,.52);
    font-size:15px;line-height:1.95;word-break:keep-all;
}
.reading h2{
    margin:0 0 18px;font-size:30px;line-height:1.35;letter-spacing:-.035em;
}

/* MAIN ARTICLES */
.content-steps{padding:10px 0 115px;background:#080c13}
.content-step{
    display:grid;grid-template-columns:190px minmax(0,790px);
    gap:70px;padding:78px 0;border-bottom:1px solid rgba(255,255,255,.085);
}
.index .num{
    display:block;color:#c5ff2f;font-size:42px;font-weight:700;letter-spacing:-.04em;
}
.index small{
    display:block;margin-top:10px;color:rgba(255,255,255,.28);
    font-size:10px;font-weight:700;letter-spacing:.16em;
}
.body h2{
    margin:0 0 24px;font-size:clamp(30px,3.1vw,44px);
    line-height:1.25;letter-spacing:-.04em;word-break:keep-all;
}
.body p{
    max-width:760px;margin:0;color:rgba(255,255,255,.5);
    font-size:15px;line-height:1.95;word-break:keep-all;
}
.body p+p{margin-top:18px}
.em{color:#c5ff2f;font-weight:700}
.underline{
    color:rgba(255,255,255,.88);font-weight:600;
    text-decoration-line:underline;text-decoration-color:rgba(197,255,47,.72);
    text-decoration-thickness:1px;text-underline-offset:4px;
}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px}
.tags span{
    padding:9px 12px;border:1px solid rgba(255,255,255,.09);
    color:rgba(255,255,255,.56);font-size:11px;font-weight:600;
}
.info-box{
    margin-top:30px;padding:20px 22px;border-left:2px solid #c5ff2f;
    background:rgba(255,255,255,.025);
}
.info-box span{
    display:block;margin-bottom:8px;color:#c5ff2f;
    font-size:10px;font-weight:800;letter-spacing:.15em;
}
.info-box p{margin:0;color:rgba(255,255,255,.7);font-size:13px;line-height:1.75}

/* WHY */
.why{padding:112px 0;background:#0c1119}
.section-head{
    display:flex;justify-content:space-between;align-items:end;gap:60px;margin-bottom:50px;
}
.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:30px;line-height:1.2;letter-spacing:-.04em;
}
.section-head p{
    max-width:440px;margin:0;color:rgba(255,255,255,.44);
    font-size:14px;line-height:1.8;
}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.why-card{
    min-height:245px;padding:28px;border:1px solid rgba(255,255,255,.08);
    background:linear-gradient(145deg,rgba(255,255,255,.02),rgba(255,255,255,.008));
}
.why-card .n{color:rgba(255,255,255,.24);font-size:11px;font-weight:700}
.why-card h3{
    margin:52px 0 14px;font-size:24px;line-height:1.35;letter-spacing:-.035em;
}
.why-card p{
    margin:0;color:rgba(255,255,255,.45);font-size:13px;line-height:1.8;
}

/* TYPES TABLE */
.types{padding:115px 0;background:#080c13}
.table-wrap{overflow-x:auto;border-top:1px solid rgba(255,255,255,.1)}
.info-table{width:100%;border-collapse:collapse;min-width:760px}
.info-table th,.info-table td{
    padding:21px 18px;text-align:left;border-bottom:1px solid rgba(255,255,255,.08);
}
.info-table th{
    color:rgba(255,255,255,.36);font-size:10px;font-weight:800;letter-spacing:.14em;
}
.info-table td{color:rgba(255,255,255,.6);font-size:13px;line-height:1.7}
.info-table td:first-child{color:#fff;font-weight:700}
.info-table td:nth-child(2){color:#c5ff2f;font-weight:700}

/* COMPARISON */
.compare{padding:112px 0;background:#0c1119}
.compare-grid{
    display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:48px;
}
.case{
    padding:34px;border:1px solid rgba(255,255,255,.08);
    background:rgba(255,255,255,.015);
}
.case-top{
    display:flex;justify-content:space-between;gap:20px;align-items:center;
    padding-bottom:22px;border-bottom:1px solid rgba(255,255,255,.08);
}
.case-top span{font-size:11px;color:rgba(255,255,255,.3);font-weight:700}
.case-top strong{font-size:26px;color:#c5ff2f}
.case ul{list-style:none;padding:0;margin:28px 0 0}
.case li{
    display:flex;justify-content:space-between;gap:30px;
    padding:13px 0;border-bottom:1px solid rgba(255,255,255,.055);
    color:rgba(255,255,255,.55);font-size:13px;
}
.case li b{color:rgba(255,255,255,.84);font-weight:600}
.compare-note{
    margin-top:24px;padding:24px 26px;border:1px solid rgba(197,255,47,.14);
    color:rgba(255,255,255,.62);font-size:14px;line-height:1.85;
}
.compare-note strong{color:#c5ff2f}

/* TERMS */
.terms{padding:115px 0;background:#080c13}
.term-grid{
    display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:48px;
}
.term-card{
    min-height:220px;padding:26px;border:1px solid rgba(255,255,255,.08);
    background:linear-gradient(145deg,rgba(255,255,255,.02),rgba(255,255,255,.008));
}
.term-card span{color:#c5ff2f;font-size:10px;font-weight:800;letter-spacing:.15em}
.term-card h3{margin:38px 0 12px;font-size:21px;letter-spacing:-.03em}
.term-card p{margin:0;color:rgba(255,255,255,.45);font-size:13px;line-height:1.8}

/* CHECK LIST */
.checklist{padding:115px 0;background:#0c1119}
.check-card{
    display:grid;grid-template-columns:.9fr 1.1fr;gap:80px;
    padding:56px;border:1px solid rgba(197,255,47,.2);
    background:linear-gradient(135deg,rgba(197,255,47,.04),rgba(255,255,255,.014));
}
.check-copy span{
    display:block;margin-bottom:18px;color:#c5ff2f;
    font-size:11px;font-weight:800;letter-spacing:.18em;
}
.check-copy h2{
    margin:0;font-size:34px;line-height:1.25;letter-spacing:-.04em;
}
.check-copy p{
    margin:18px 0 0;color:rgba(255,255,255,.44);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:42px 1fr 32px;gap:16px;
    align-items:center;min-height:68px;border-bottom:1px solid rgba(255,255,255,.08);
}
.check-row>span{color:rgba(255,255,255,.28);font-size:10px;font-weight:700}
.check-row strong{color:rgba(255,255,255,.82);font-size:14px;font-weight:600}
.check-row i{
    width:28px;height:28px;display:grid;place-items:center;
    border:1px solid rgba(197,255,47,.25);border-radius:50%;
    color:#c5ff2f;font-size:11px;font-style:normal;
}

/* FAQ */
.faq{padding:115px 0;background:#080c13}
.faq-grid{
    display:grid;grid-template-columns:320px minmax(0,1fr);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;line-height:1.22;letter-spacing:-.04em}
.faq-list{border-top:1px solid rgba(255,255,255,.1)}
.faq-item{padding:26px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.faq-item h3{margin:0 0 12px;font-size:18px;letter-spacing:-.025em}
.faq-item p{
    margin:0;color:rgba(255,255,255,.5);
    font-size:14px;line-height:1.85;word-break:keep-all;
}

/* FINAL */
.final-note{padding:100px 0 120px;background:#0c1119}
.next{
    padding:90px 0 135px;background:#080c13;border-top:1px solid rgba(255,255,255,.05);
}
.next-link{
    display:flex;align-items:center;justify-content:space-between;gap:40px;
    min-height:230px;padding:46px 52px;border:1px solid rgba(255,255,255,.09);
    background:linear-gradient(145deg,rgba(255,255,255,.025),rgba(255,255,255,.01));
    text-decoration:none;transition:.25s;
}
.next-link:hover{transform:translateY(-3px);border-color:rgba(197,255,47,.32)}
.next-link>div>span{
    display:block;margin-bottom:16px;color:#c5ff2f;
    font-size:10px;font-weight:800;letter-spacing:.18em;
}
.next-link h2{
    margin:0 0 10px;font-size:clamp(30px,3.3vw,44px);
    line-height:1.2;letter-spacing:-.04em;
}
.next-link p{margin:0;color:rgba(255,255,255,.44);font-size:14px}
.next-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;
}

@media(max-width:980px){
    .hero-grid,.summary-card,.check-card{grid-template-columns:1fr}
    .hero-meta{max-width:560px}
    .reading-grid,.content-step{grid-template-columns:145px minmax(0,1fr);gap:44px}
    .why-grid{grid-template-columns:1fr}
    .compare-grid{grid-template-columns:1fr}
    .term-grid{grid-template-columns:1fr 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}
    .breadcrumb{margin-bottom:44px}
    h1{font-size:44px}
    .hero-copy>p{font-size:14px}
    .summary,.overview,.why,.types,.compare,.terms,.checklist,.faq,.final-note{padding:76px 0}
    .summary-card,.check-card{padding:30px 24px}
    .summary-card h2,.check-copy h2{font-size:30px}
    .reading-grid,.content-step{grid-template-columns:1fr;gap:24px}
    .reading .lead{font-size:19px}
    .content-step{padding:58px 0}
    .index{display:flex;align-items:baseline;gap:14px}
    .index .num{font-size:34px}
    .index small{margin-top:0}
    .body h2{font-size:30px}
    .section-head{display:block}
    .section-head p{margin-top:18px}
    .term-grid{grid-template-columns:1fr}
    .next{padding:70px 0 95px}
    .next-link{min-height:210px;padding:32px 26px}
    .footer-top{flex-direction:column}
    .footer-bottom{flex-direction:column}
}
@media(max-width:480px){
    h1{font-size:37px}
    .kicker{font-size:10px}
    .reading p,.body p{font-size:14px}
    .body h2{font-size:27px}
    .check-row{grid-template-columns:34px 1fr 28px;gap:10px}
    .next-link{align-items:flex-end}
    .next-link p{display:none}
    .next-arrow{width:48px;height:48px}
}