/* ─────────────────────────────────────
   Korven · 공통 스타일시트
   ───────────────────────────────────── */

:root {
  --ink: #0a0a0a;
  --paper: #fafafa;
  --paper-2: #f1f0eb;
  --rule: #e0ddd6;
  --rule-2: #d2cec5;
  --mute: #6b6b6b;
  --mute-2: #8e8b84;
  --soft: #f4f3ee;
  --dark: #0d0d10;
  --dark-2: #16161a;
  --accent: #d23427;
  --accent-deep: #a51d1d;
  --signal: #2dd4a6;
  --mono: "JetBrains Mono", "SF Mono", "Menlo", monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Inter", system-ui, sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  word-break: keep-all;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 32px; }
.wrap-narrow { max-width: 880px; margin: 0 auto; padding: 0 32px; }

/* ── 상단 nav ── */
nav.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: #fff;
}
nav.top .brand { font-weight: 600; letter-spacing: 0.08em; font-size: 14px; text-decoration: none; color: inherit; }
nav.top .links { display: flex; gap: 28px; font-size: 13px; color: rgba(255,255,255,0.62); }
nav.top .links a { color: inherit; text-decoration: none; transition: color .15s; }
nav.top .links a:hover { color: #fff; }
nav.top .right { display: flex; align-items: center; gap: 18px; }
nav.top .contact a {
  color: #fff;
  text-decoration: none;
  font-size: 13px;
  background: rgba(255,255,255,0.08);
  padding: 8px 14px;
  border-radius: 4px;
  transition: background .15s;
  border: 1px solid rgba(255,255,255,0.14);
}
nav.top .contact a:hover { background: rgba(255,255,255,0.16); }

/* ── nav가 흰 바탕 위에 있을 때 (하위 페이지) ── */
.light-nav nav.top { color: var(--ink); border-bottom: 1px solid var(--rule); }
.light-nav nav.top .links { color: var(--mute); }
.light-nav nav.top .links a:hover { color: var(--ink); }
.light-nav nav.top .contact a { color: var(--ink); background: transparent; border: 1px solid var(--ink); }
.light-nav nav.top .contact a:hover { background: var(--ink); color: #fff; }

/* ── hero (다크) ── */
.hero-wrap {
  background: linear-gradient(180deg, var(--dark) 0%, #0a0a0c 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero-wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(800px 400px at 80% 30%, rgba(210,52,39,0.12) 0%, transparent 60%),
    radial-gradient(600px 300px at 10% 80%, rgba(45,212,166,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.hero-wrap > * { position: relative; }
section.hero { padding: 88px 0 120px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .14em;
  color: rgba(255,255,255,0.6);
  margin-bottom: 28px;
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 999px;
  background: rgba(255,255,255,0.03);
}
.hero-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--signal);
  animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(45,212,166,0.7); }
  70%  { box-shadow: 0 0 0 9px rgba(45,212,166,0); }
  100% { box-shadow: 0 0 0 0 rgba(45,212,166,0); }
}
section.hero h1 {
  font-size: 56px;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.2;
  max-width: 900px;
  margin-bottom: 28px;
}
section.hero h1 .em {
  background: linear-gradient(90deg, #fff 0%, #fff 60%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
section.hero p.lede {
  font-size: 18px;
  color: rgba(255,255,255,0.66);
  max-width: 760px;
  line-height: 1.75;
  margin-bottom: 44px;
}
section.hero .cta-row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
section.hero .cta {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; letter-spacing: .02em;
  color: var(--ink); background: #fff;
  text-decoration: none;
  padding: 14px 22px; border-radius: 4px;
  transition: transform .15s;
}
section.hero .cta:hover { transform: translateY(-1px); }
section.hero .cta.ghost {
  background: transparent; color: rgba(255,255,255,0.85);
  border: 1px solid rgba(255,255,255,0.2);
}
section.hero .cta.ghost:hover { background: rgba(255,255,255,0.06); color: #fff; }

/* hero 하단 stats strip */
.hero-strip {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 32px 0 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.hero-strip .stat .k {
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 8px;
}
.hero-strip .stat .v {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
}
.hero-strip .stat .d {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  margin-top: 6px;
  line-height: 1.7;
}

/* ── 일반 섹션 ── */
section.s {
  padding: 120px 0;
  border-bottom: 1px solid var(--rule);
}
section.s.alt { background: var(--soft); }
section.s .head { margin-bottom: 56px; max-width: 800px; }
section.s .head .num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mute);
  margin-bottom: 18px;
}
section.s .head h2 {
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.3;
  margin-bottom: 18px;
}
section.s .head p {
  font-size: 17px;
  color: var(--mute);
  line-height: 1.8;
}

/* "자세히 보기" 인라인 링크 */
.more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
  margin-top: 24px;
  transition: color .15s, border-color .15s;
}
.more-link:hover { color: var(--accent); border-color: var(--accent); }

/* ── 솔루션 카드 ── */
.solutions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.sol {
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 32px;
  background: #fff;
  transition: border-color .15s;
  display: flex;
  flex-direction: column;
}
.sol:hover { border-color: var(--ink); }
.sol .pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono);
  font-size: 11px; font-weight: 600;
  letter-spacing: .12em;
  color: var(--accent);
  background: rgba(210,52,39,0.06);
  padding: 4px 10px; border-radius: 999px;
  margin-bottom: 18px;
  align-self: flex-start;
}
.sol h3 {
  font-size: 22px; font-weight: 600; letter-spacing: -0.02em;
  line-height: 1.4; margin-bottom: 14px;
}
.sol p {
  font-size: 15px; color: var(--mute); line-height: 1.8;
  margin-bottom: 22px;
}
.sol .domains {
  display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 22px;
}
.sol .domains .chip {
  font-size: 12px; color: var(--ink);
  background: var(--soft);
  padding: 5px 10px; border-radius: 4px;
  font-weight: 500;
}
.sol .features { list-style: none; padding-top: 18px; border-top: 1px solid var(--rule); }
.sol .features li {
  font-size: 14px; color: var(--ink);
  padding: 8px 0;
  display: grid; grid-template-columns: 28px 1fr; gap: 10px;
  align-items: start;
}
.sol .features li .ic {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  padding-top: 3px;
  font-weight: 600;
}
.sol .features li span:last-child { color: var(--mute); line-height: 1.7; }
.sol .features li b { color: var(--ink); font-weight: 600; }
.sol .more-link { margin-top: auto; padding-top: 24px; }

/* ── 다이어그램 (다크 박스) ── */
.arch {
  background: var(--dark);
  color: #fff;
  border-radius: 12px;
  padding: 56px 48px;
  margin-top: 56px;
  position: relative;
  overflow: hidden;
}
.arch::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 300px at 50% 10%, rgba(210,52,39,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.arch > * { position: relative; }
.arch .lbl {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 12px;
}
.arch .ttl {
  font-size: 22px; font-weight: 600;
  letter-spacing: -0.02em; line-height: 1.4;
  margin-bottom: 36px;
  max-width: 720px;
}
.arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  position: relative;
}
.arch-grid::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.18) 20%, rgba(255,255,255,0.18) 80%, transparent 100%);
  z-index: 0;
}
.tier {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 24px 22px;
  position: relative;
  z-index: 1;
}
.tier .num { font-family: var(--mono); font-size: 11px; color: var(--accent); margin-bottom: 8px; letter-spacing: .12em; }
.tier h4 { font-size: 17px; font-weight: 600; margin-bottom: 12px; letter-spacing: -0.01em; }
.tier p { font-size: 13.5px; color: rgba(255,255,255,0.65); line-height: 1.75; }

/* ── 인증마크 프레임 ── */
.cert-frame {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.cert-frame .left { padding: 40px 38px; }
.cert-frame .left h3 { font-size: 24px; font-weight: 600; letter-spacing: -0.02em; line-height: 1.4; margin-bottom: 18px; }
.cert-frame .left p { font-size: 15px; color: var(--mute); line-height: 1.85; margin-bottom: 14px; }
.cert-frame .left p:last-child { margin-bottom: 0; }
.cert-frame .right {
  background: var(--dark);
  color: #fff;
  padding: 40px 38px;
  display: flex; flex-direction: column; justify-content: center;
  gap: 28px;
}
.cert-frame .right .label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(255,255,255,0.45);
}
.cert-mark-big {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 14px 22px 14px 14px;
  border: 2px solid #fff;
  background: rgba(255,255,255,0.04);
  align-self: flex-start;
}
.cert-mark-big .sym {
  width: 52px; height: 52px;
  background: #fff; color: var(--dark);
  display: flex; align-items: center; justify-content: center;
  font-size: 30px; font-weight: 800;
  letter-spacing: -0.04em;
}
.cert-mark-big .txt { display: flex; flex-direction: column; gap: 3px; line-height: 1.3; }
.cert-mark-big .txt .r1 { font-size: 13px; font-weight: 700; letter-spacing: .18em; color: #fff; }
.cert-mark-big .txt .r2 { font-size: 11px; font-weight: 600; letter-spacing: .18em; color: rgba(255,255,255,0.55); }
.verify-block {
  font-family: var(--mono);
  font-size: 12.5px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  padding: 18px 20px;
  line-height: 1.85;
  color: rgba(255,255,255,0.86);
}
.verify-block .k { color: rgba(255,255,255,0.45); }
.verify-block .ok { color: var(--signal); }
.verify-block .em { color: #ffba6a; }

/* ── 표준 그리드 ── */
.standards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}
.std-item {
  padding: 28px 26px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.std-item:nth-child(3n) { border-right: none; }
.std-item:nth-last-child(-n+3) { border-bottom: none; }
.std-item .acro {
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}
.std-item .desc { font-size: 13.5px; color: var(--mute); line-height: 1.75; }

/* ── 원칙 그리드 ── */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}
.prin {
  padding: 36px 32px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.prin:nth-child(2n) { border-right: none; }
.prin:nth-last-child(-n+2) { border-bottom: none; }
.prin .num { font-family: var(--mono); font-size: 64px; font-weight: 300; color: var(--rule-2); line-height: 1; letter-spacing: -0.04em; margin-bottom: 20px; }
.prin h3 { font-size: 18px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.4; margin-bottom: 14px; }
.prin p { font-size: 14px; color: var(--mute); line-height: 1.85; }

/* ── 도입 절차 가로 흐름 ── */
.flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 12px;
  position: relative;
}
.flow::before {
  content: "";
  position: absolute;
  top: 24px;
  left: 4%; right: 4%;
  height: 1px;
  background: var(--rule-2);
  z-index: 0;
}
.step { position: relative; padding-right: 24px; z-index: 1; }
.step .pin {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--rule-2);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: 14px; font-weight: 700;
  color: var(--ink);
  margin-bottom: 22px;
}
.step:first-child .pin { background: var(--ink); color: #fff; border-color: var(--ink); }
.step h4 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 10px; }
.step p { font-size: 13.5px; color: var(--mute); line-height: 1.75; }

/* ── 운영 영역 sectors ── */
.sectors {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin-bottom: 28px;
}
.sect {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 22px 16px;
  text-align: center;
}
.sect .ic { font-family: var(--mono); font-size: 10px; color: var(--mute); letter-spacing: .1em; margin-bottom: 10px; }
.sect .name { font-size: 14px; font-weight: 600; color: var(--ink); }

/* ── 자문 다크 밴드 ── */
.advisory-band {
  background: var(--dark);
  color: #fff;
  border-radius: 12px;
  padding: 48px;
  margin-top: 28px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}
.advisory-band .label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(255,255,255,0.55);
  padding-top: 8px;
}
.advisory-band p { font-size: 16px; line-height: 1.85; color: rgba(255,255,255,0.86); margin-bottom: 16px; }
.advisory-band p:last-child { margin-bottom: 0; color: rgba(255,255,255,0.6); }

/* ── 푸터 ── */
footer {
  background: var(--dark);
  color: rgba(255,255,255,0.6);
  padding: 64px 0 56px;
}
footer .row {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 13px;
}
footer .brand { color: #fff; font-size: 14px; font-weight: 600; letter-spacing: .08em; }
footer .meta { display: flex; gap: 22px; font-family: var(--mono); font-size: 12px; }

/* ── 별도 페이지 진입 strip (메인) ── */
.pages-strip {
  background: #fff;
  border-bottom: 1px solid var(--rule);
  padding: 28px 0;
}
.pages-strip .label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mute);
  margin-bottom: 14px;
}
.pages-strip .grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.pages-strip a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  text-decoration: none;
  background: var(--paper);
  transition: border-color .15s, background .15s;
}
.pages-strip a:hover { border-color: var(--ink); background: #fff; }
.pages-strip a .num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  letter-spacing: .12em;
  margin-bottom: 6px;
}
.pages-strip a .name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  letter-spacing: -0.01em;
}
.pages-strip a .name .arrow { color: var(--mute); transition: color .15s, transform .15s; }
.pages-strip a:hover .name .arrow { color: var(--accent); transform: translateX(2px); }

/* ── 문의 폼 섹션 ── */
.contact-section {
  background: var(--dark);
  color: #fff;
  padding: 100px 0;
}
.contact-section .head { margin-bottom: 48px; max-width: 760px; }
.contact-section .head .num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 18px;
}
.contact-section .head h2 {
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.3;
  margin-bottom: 18px;
}
.contact-section .head p {
  font-size: 16px;
  color: rgba(255,255,255,0.7);
  line-height: 1.85;
}

.cform {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  max-width: 880px;
}
.cform .full { grid-column: 1 / -1; }
.cform label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
}
.cform label .req { color: var(--accent); }
.cform input[type="text"],
.cform input[type="email"],
.cform input[type="tel"],
.cform select,
.cform textarea {
  width: 100%;
  padding: 13px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 6px;
  color: #fff;
  font-size: 14.5px;
  font-family: inherit;
  transition: border-color .15s, background .15s;
}
.cform input:focus,
.cform select:focus,
.cform textarea:focus {
  outline: none;
  border-color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.06);
}
.cform input::placeholder, .cform textarea::placeholder { color: rgba(255,255,255,0.3); }
.cform textarea { resize: vertical; min-height: 120px; line-height: 1.7; }
.cform select { appearance: none; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1L6 6L11 1' stroke='rgba(255,255,255,0.5)' stroke-width='1.4' fill='none'/></svg>"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 36px; }
.cform .checkboxes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 16px;
}
.cform .checkboxes label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-size: 14px;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0;
  margin-bottom: 0;
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 6px;
  background: rgba(255,255,255,0.03);
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.cform .checkboxes label:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.3); }
.cform .checkboxes input[type="checkbox"] { accent-color: var(--accent); width: 16px; height: 16px; cursor: pointer; }
.cform .submit-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 6px;
}
.cform .submit-row .legal {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
}
.cform button[type="submit"] {
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  padding: 14px 28px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: transform .15s;
}
.cform button[type="submit"]:hover { transform: translateY(-1px); }

@media (max-width: 940px) {
  .pages-strip .grid { grid-template-columns: repeat(2, 1fr); }
  .cform { grid-template-columns: 1fr; padding: 28px; }
  .cform .checkboxes { grid-template-columns: 1fr; }
  .cform .submit-row { flex-direction: column; align-items: stretch; }
  .contact-section { padding: 64px 0; }
  .contact-section .head h2 { font-size: 26px; }
}

/* ── 하위 페이지 콘텐츠 ── */
.subpage-head {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--rule);
  background: var(--soft);
}
.subpage-head .crumb {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mute);
  margin-bottom: 14px;
}
.subpage-head .crumb a { color: inherit; text-decoration: none; }
.subpage-head .crumb a:hover { color: var(--accent); }
.subpage-head h1 {
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.25;
  max-width: 800px;
  margin-bottom: 18px;
}
.subpage-head p.lede {
  font-size: 17px;
  color: var(--mute);
  line-height: 1.85;
  max-width: 740px;
}

.subpage-body { padding: 80px 0 120px; }
.subpage-body .block { margin-bottom: 64px; max-width: 800px; }
.subpage-body .block:last-child { margin-bottom: 0; }
.subpage-body .block .num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--accent);
  margin-bottom: 14px;
}
.subpage-body .block h2 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.4;
  margin-bottom: 20px;
}
.subpage-body .block h3 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.5;
  margin: 28px 0 12px;
}
.subpage-body .block p {
  font-size: 16px;
  color: var(--ink);
  line-height: 1.95;
  margin-bottom: 16px;
}
.subpage-body .block p.mute { color: var(--mute); }
.subpage-body .block ul {
  list-style: none;
  padding: 0;
  margin: 16px 0;
}
.subpage-body .block ul li {
  padding: 10px 0 10px 22px;
  position: relative;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}
.subpage-body .block ul li:last-child { border-bottom: none; }
.subpage-body .block ul li::before {
  content: "·";
  position: absolute;
  left: 6px;
  color: var(--accent);
  font-weight: 700;
}
.subpage-body .block ul li b { font-weight: 600; }

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14.5px;
}
.spec-table th, .spec-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  line-height: 1.75;
}
.spec-table th {
  font-weight: 600;
  color: var(--mute);
  width: 30%;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .04em;
}
.spec-table td { color: var(--ink); }

.callout {
  background: var(--soft);
  border-left: 3px solid var(--accent);
  padding: 22px 26px;
  margin: 24px 0;
  border-radius: 0 6px 6px 0;
}
.callout p { font-size: 15.5px; color: var(--ink); line-height: 1.85; margin: 0; }

.subpage-end {
  margin-top: 80px;
  padding-top: 36px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.subpage-end .back {
  font-size: 14px;
  color: var(--mute);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.subpage-end .back:hover { color: var(--ink); }
.subpage-end .related {
  font-size: 13px;
  color: var(--mute);
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.subpage-end .related a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
}
.subpage-end .related a:hover { border-color: var(--accent); color: var(--accent); }

/* ── 반응형 ── */
@media (max-width: 940px) {
  .wrap, .wrap-narrow { padding: 0 22px; }
  section.hero { padding: 56px 0 80px; }
  section.hero h1 { font-size: 34px; }
  section.hero p.lede { font-size: 16px; }
  .hero-strip { grid-template-columns: repeat(2, 1fr); padding: 24px 0 36px; }
  section.s { padding: 72px 0; }
  section.s .head h2 { font-size: 26px; }
  .solutions { grid-template-columns: 1fr; }
  .sol { padding: 26px; }
  .arch { padding: 36px 26px; margin-top: 36px; }
  .arch-grid { grid-template-columns: 1fr; gap: 12px; }
  .arch-grid::before { display: none; }
  .cert-frame { grid-template-columns: 1fr; }
  .cert-frame .left, .cert-frame .right { padding: 32px 26px; }
  .standards-grid { grid-template-columns: 1fr; }
  .std-item { border-right: none; border-bottom: 1px solid var(--rule); }
  .std-item:last-child { border-bottom: none; }
  .principles-grid { grid-template-columns: 1fr; }
  .prin { border-right: none; border-bottom: 1px solid var(--rule); padding: 28px 24px; }
  .prin:last-child { border-bottom: none; }
  .prin .num { font-size: 48px; }
  .flow { grid-template-columns: 1fr; gap: 24px; }
  .flow::before { display: none; }
  .sectors { grid-template-columns: repeat(2, 1fr); }
  .advisory-band { grid-template-columns: 1fr; gap: 18px; padding: 32px 26px; }
  nav.top .links { display: none; }
  footer .row { flex-direction: column; gap: 14px; }
  .subpage-head { padding: 36px 0 28px; }
  .subpage-head h1 { font-size: 28px; }
  .subpage-body { padding: 56px 0 80px; }
  .subpage-body .block h2 { font-size: 22px; }
}

/* ━━━━━━━━━━ Language toggle ━━━━━━━━━━ */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.2px;
  color: rgba(255, 255, 255, 0.55);
  margin-right: 18px;
  text-transform: uppercase;
}
.lang-toggle a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  padding: 4px 6px;
  transition: color 0.2s;
}
.lang-toggle a:hover { color: rgba(255, 255, 255, 0.95); }
.lang-toggle a.active { color: #fff; }
.lang-toggle span { color: rgba(255, 255, 255, 0.3); }

.light-nav .lang-toggle,
.light-nav .lang-toggle a {
  color: rgba(15, 23, 42, 0.55);
}
.light-nav .lang-toggle a:hover { color: #0f172a; }
.light-nav .lang-toggle a.active { color: #0f172a; }
.light-nav .lang-toggle span { color: rgba(15, 23, 42, 0.25); }

@media (max-width: 720px) {
  .lang-toggle { margin-right: 12px; font-size: 11px; }
}

/* ━━━━━━━━━━ 모바일 (스마트폰 360-720px) ━━━━━━━━━━ */
@media (max-width: 720px) {
  /* 공통 wrap */
  .wrap, .wrap-narrow { padding: 0 18px; }

  /* 상단 nav */
  nav.top {
    flex-wrap: wrap;
    padding: 14px 0;
    gap: 8px;
  }
  nav.top .brand { font-size: 13px; letter-spacing: 0.1em; }
  nav.top .right { gap: 8px; }
  nav.top .contact a { padding: 7px 11px; font-size: 12px; }

  /* hero */
  section.hero { padding: 36px 0 56px; }
  .hero-eyebrow { font-size: 10.5px; padding: 5px 10px; margin-bottom: 18px; }
  section.hero h1 { font-size: 26px; line-height: 1.3; margin-bottom: 18px; }
  section.hero p.lede { font-size: 14.5px; line-height: 1.75; margin-bottom: 28px; }
  section.hero .cta-row { flex-direction: column; align-items: stretch; gap: 10px; }
  section.hero .cta { padding: 13px 18px; font-size: 13px; justify-content: center; }

  /* hero stats strip */
  .hero-strip {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 22px 0 32px;
  }
  .hero-strip .stat .v { font-size: 18px; }
  .hero-strip .stat .d { font-size: 12.5px; }

  /* pages strip */
  .pages-strip { padding: 22px 0; }
  .pages-strip .grid { grid-template-columns: 1fr; gap: 6px; }
  .pages-strip a { padding: 14px 16px; }

  /* 일반 섹션 */
  section.s { padding: 56px 0; }
  section.s .head { margin-bottom: 32px; }
  section.s .head .num { font-size: 11px; margin-bottom: 12px; }
  section.s .head h2 { font-size: 22px; line-height: 1.35; }
  section.s .head p { font-size: 14.5px; line-height: 1.75; }

  /* 솔루션 카드 */
  .sol { padding: 22px; }
  .sol .pill { font-size: 10.5px; }
  .sol h3 { font-size: 18px; margin-bottom: 12px; }
  .sol p { font-size: 14px; line-height: 1.75; margin-bottom: 18px; }
  .sol .domains .chip { font-size: 11.5px; padding: 4px 9px; }
  .sol .features li { font-size: 13.5px; grid-template-columns: 38px 1fr; gap: 8px; }

  /* arch (다크 다이어그램) */
  .arch { padding: 30px 22px; margin-top: 36px; }
  .arch .ttl { font-size: 17px; margin-bottom: 24px; line-height: 1.5; }
  .tier { padding: 18px 16px; }
  .tier h4 { font-size: 15px; margin-bottom: 10px; }
  .tier p { font-size: 13px; }

  /* 인증 프레임 */
  .cert-frame .left, .cert-frame .right { padding: 26px 22px; }
  .cert-frame .left h3 { font-size: 19px; margin-bottom: 14px; }
  .cert-frame .left p { font-size: 14px; line-height: 1.8; margin-bottom: 12px; }
  .cert-frame .right { gap: 22px; }
  .cert-mark-big { padding: 11px 16px 11px 11px; gap: 12px; }
  .cert-mark-big .sym { width: 42px; height: 42px; font-size: 24px; }
  .cert-mark-big .txt .r1 { font-size: 11.5px; letter-spacing: .14em; }
  .cert-mark-big .txt .r2 { font-size: 10px; letter-spacing: .14em; }
  .verify-block { font-size: 11.5px; padding: 16px 16px; line-height: 1.75; }

  /* 표준 그리드 */
  .std-item { padding: 22px 20px; }
  .std-item .acro { font-size: 16px; }
  .std-item .desc { font-size: 13px; }

  /* 원칙 그리드 */
  .prin { padding: 24px 20px; }
  .prin .num { font-size: 38px; margin-bottom: 14px; }
  .prin h3 { font-size: 17px; margin-bottom: 12px; }
  .prin p { font-size: 13.5px; }

  /* 도입 절차 flow */
  .flow { gap: 18px; }
  .step { padding-right: 0; }
  .step .pin { width: 40px; height: 40px; font-size: 13px; margin-bottom: 14px; }
  .step h4 { font-size: 15px; }
  .step p { font-size: 13.5px; }

  /* 운영 영역 */
  .sectors { grid-template-columns: repeat(2, 1fr); gap: 6px; margin-bottom: 22px; }
  .sect { padding: 16px 12px; }
  .sect .ic { font-size: 9.5px; margin-bottom: 8px; }
  .sect .name { font-size: 13.5px; }

  /* 자문 다크 밴드 */
  .advisory-band { padding: 26px 22px; }
  .advisory-band p { font-size: 14.5px; line-height: 1.8; }

  /* 문의 섹션 */
  .contact-section { padding: 48px 0; }
  .contact-section .head { margin-bottom: 32px; }
  .contact-section .head .num { font-size: 11px; }
  .contact-section .head h2 { font-size: 22px; line-height: 1.35; }
  .contact-section .head p { font-size: 14.5px; line-height: 1.75; }
  .cform { padding: 22px; gap: 18px; }
  .cform label { font-size: 10.5px; margin-bottom: 8px; }
  .cform input[type="text"],
  .cform input[type="email"],
  .cform input[type="tel"],
  .cform select,
  .cform textarea { padding: 12px 13px; font-size: 14px; }
  .cform .checkboxes label { padding: 10px 12px; font-size: 13.5px; }
  .cform .submit-row { gap: 12px; }
  .cform .submit-row .legal { font-size: 11.5px; }
  .cform button[type="submit"] { padding: 14px 22px; width: 100%; font-size: 13.5px; }

  /* 푸터 */
  footer { padding: 40px 0 36px; }
  footer .row { gap: 12px; }
  footer .brand { font-size: 13px; }
  footer .meta { gap: 12px; flex-wrap: wrap; font-size: 11.5px; }

  /* 하위 페이지 */
  .subpage-head { padding: 32px 0 26px; }
  .subpage-head h1 { font-size: 24px; line-height: 1.3; }
  .subpage-head p.lede { font-size: 14.5px; }
  .subpage-body { padding: 48px 0 64px; }
  .subpage-body .block { margin-bottom: 48px; }
  .subpage-body .block h2 { font-size: 20px; margin-bottom: 16px; }
  .subpage-body .block h3 { font-size: 16px; }
  .subpage-body .block p { font-size: 14.5px; line-height: 1.85; }
  .subpage-body .block ul li { font-size: 14px; }
  .spec-table { font-size: 13px; }
  .spec-table th, .spec-table td { padding: 10px 12px; }
  .spec-table th { width: 38%; font-size: 11.5px; }
  .callout { padding: 18px 20px; }
  .callout p { font-size: 14px; }
  .subpage-end { margin-top: 56px; }

  /* 언어 토글 (더 좁은 폭에서) */
  .lang-toggle { margin-right: 8px; gap: 4px; font-size: 11px; }
  .lang-toggle a { padding: 4px 4px; }
}

/* ━━━━━━━━━━ 작은 스마트폰 (360-400px) ━━━━━━━━━━ */
@media (max-width: 420px) {
  nav.top { gap: 6px; }
  nav.top .brand { font-size: 12px; }
  nav.top .contact a { padding: 6px 9px; font-size: 11px; }
  section.hero h1 { font-size: 23px; }
  section.s .head h2 { font-size: 20px; }
  .contact-section .head h2 { font-size: 20px; }
  .cert-mark-big { padding: 10px 14px 10px 10px; gap: 10px; }
  .cert-mark-big .sym { width: 38px; height: 38px; font-size: 22px; }
}