:root {
  color-scheme: light;
  --ink: #111316;
  --graphite: #22262b;
  --muted: #69717d;
  --line: #e7e9ec;
  --surface: #f5f7f8;
  --white: #ffffff;
  --green: #00bd45;
  --green-dark: #009b39;
  --max: 1180px;
  font-family: Inter, "Pretendard", "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(0, 189, 69, 0.35);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--white);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(231, 233, 236, 0.92);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
}

.header-inner {
  width: min(calc(100% - 40px), var(--max));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: flex-start;
  gap: 11px;
  line-height: 1;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  box-shadow: 0 4px 14px rgba(17, 19, 22, 0.1);
}

.brand-word {
  display: grid;
  gap: 4px;
  padding-top: 2px;
}

.brand-name {
  font-size: 1.28rem;
  font-weight: 900;
  letter-spacing: -0.055em;
}

.brand-index {
  color: var(--muted);
  font-size: 0.58rem;
  font-weight: 750;
  letter-spacing: 0.25em;
}

.header-actions,
.main-nav {
  display: flex;
  align-items: center;
}

.header-actions {
  gap: 28px;
}

.main-nav {
  gap: 26px;
}

.main-nav a {
  position: relative;
  padding: 10px 0;
  color: #3f454d;
  font-weight: 650;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--ink);
}

.main-nav a[aria-current="page"]::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  border-radius: 99px;
  background: var(--green);
  content: "";
}

.download-link,
.button-dark {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--graphite);
  color: var(--white);
  font-weight: 750;
  padding: 0 18px;
  transition: transform 160ms ease, background 160ms ease;
}

.download-link:hover,
.button-dark:hover {
  background: #090a0b;
  transform: translateY(-1px);
}

.container {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.hero {
  padding: clamp(72px, 10vw, 128px) 0 64px;
  overflow: hidden;
}

.hero-copy {
  max-width: 820px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--green-dark);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(2.7rem, 6.4vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: -0.065em;
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 34px;
  color: #4f5660;
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.text-link {
  padding: 10px 2px;
  border-bottom: 1px solid #b8bec6;
  font-weight: 700;
}

.text-link:hover {
  border-color: var(--green);
}

.product-stage {
  margin: 70px 0 0;
  padding: clamp(18px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
}

.structure-diagram {
  max-width: 930px;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 58px);
  border: 1px solid #dfe3e6;
  border-radius: 18px;
  background: var(--white);
}

.structure-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.structure-heading strong {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.05em;
}

.structure-heading span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.15em;
}

.structure-network {
  position: relative;
  display: grid;
  grid-template-columns: 1fr minmax(170px, 0.85fr) 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
  padding: clamp(38px, 6vw, 70px) 0;
}

.structure-network::before,
.structure-network::after {
  position: absolute;
  top: 50%;
  width: calc(25% - 24px);
  height: 1px;
  background: #cfd5d9;
  content: "";
}

.structure-network::before {
  left: 23%;
}

.structure-network::after {
  right: 23%;
}

.structure-group {
  display: grid;
  gap: 12px;
}

.structure-node {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  border: 1px solid #d9dde1;
  border-radius: 12px;
  background: var(--white);
  color: #3f464f;
  font-weight: 750;
}

.structure-core {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 150px;
  place-content: center;
  justify-items: center;
  border-radius: 18px;
  background: var(--graphite);
  color: var(--white);
  text-align: center;
}

.core-mark {
  width: 16px;
  height: 16px;
  margin-bottom: 14px;
  border: 4px solid var(--green);
  border-radius: 50%;
}

.structure-core strong {
  font-size: 1.3rem;
}

.structure-core small {
  margin-top: 3px;
  color: #bfc5cb;
  font-size: 0.78rem;
}

.structure-path {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 3vw, 28px);
  padding: 16px 18px;
  border-radius: 12px;
  background: #eef1f2;
  color: #4d555e;
  font-size: 0.88rem;
  font-weight: 760;
}

.structure-path b {
  color: var(--green-dark);
  font-weight: 900;
}

.product-stage figcaption {
  margin: 16px 2px 0;
  color: var(--muted);
  font-size: 0.88rem;
  text-align: center;
}

.section {
  padding: clamp(76px, 10vw, 128px) 0;
  border-top: 1px solid var(--line);
}

.section-kicker {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.section-title {
  max-width: 760px;
  margin-bottom: 50px;
  font-size: clamp(2rem, 4.2vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.055em;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
}

.feature-item {
  min-height: 210px;
  padding: 30px 26px 28px 0;
  border-bottom: 1px solid var(--line);
}

.feature-item + .feature-item {
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.feature-number {
  margin-bottom: 52px;
  color: var(--green-dark);
  font-size: 0.78rem;
  font-weight: 850;
}

.feature-item h3 {
  margin-bottom: 10px;
  font-size: 1.35rem;
  letter-spacing: -0.035em;
}

.feature-item p {
  margin-bottom: 0;
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(48px, 8vw, 110px);
  align-items: start;
}

.news-list {
  border-top: 1px solid var(--ink);
}

.news-row {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 20px;
  align-items: center;
  min-height: 82px;
  border-bottom: 1px solid var(--line);
}

.news-row:hover .news-title {
  text-decoration: underline;
  text-decoration-color: var(--green);
  text-underline-offset: 5px;
}

.tag {
  width: fit-content;
  padding: 5px 9px;
  border: 1px solid #cfd4d9;
  border-radius: 99px;
  color: #48505a;
  font-size: 0.76rem;
  font-weight: 750;
}

.news-title {
  font-weight: 720;
}

.news-date {
  color: var(--muted);
  font-size: 0.87rem;
}

.download-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  padding: clamp(34px, 5vw, 62px);
  border-radius: 22px;
  background: var(--graphite);
  color: var(--white);
}

.download-panel h2 {
  margin-bottom: 10px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.05em;
}

.download-panel p {
  margin-bottom: 0;
  color: #c6cbd1;
}

.store-buttons {
  display: flex;
  gap: 10px;
}

.store-button {
  min-width: 148px;
  padding: 13px 16px;
  border: 1px solid #555b63;
  border-radius: 11px;
  background: #30343a;
  color: #d9dde1;
  line-height: 1.2;
}

.store-button strong,
.store-button small {
  display: block;
}

.store-button strong {
  font-size: 0.96rem;
}

.store-button small {
  margin-top: 5px;
  color: #aeb4bb;
  font-size: 0.72rem;
}

.page-hero {
  padding: clamp(72px, 10vw, 124px) 0 50px;
}

.page-hero h1 {
  margin-bottom: 16px;
  font-size: clamp(2.65rem, 6vw, 4.9rem);
}

.page-description {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.content-section {
  padding: 0 0 clamp(90px, 12vw, 150px);
}

.notice-card {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.notice-summary {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 26px 0;
}

.notice-body {
  padding: 32px 0 40px 118px;
  border-top: 1px solid var(--line);
  color: #4d545d;
}

.notice-body p:last-child {
  margin-bottom: 0;
}

.support-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  padding: clamp(32px, 5vw, 58px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
}

.support-card h2 {
  margin-bottom: 12px;
  font-size: clamp(1.65rem, 3vw, 2.5rem);
  letter-spacing: -0.04em;
}

.support-card p {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--muted);
}

.operator-support-link {
  display: flex;
  min-height: 76px;
  margin-top: 16px;
  padding: 18px 20px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: #343a42;
  transition: border-color 160ms ease, background 160ms ease;
}

.operator-support-link:hover {
  border-color: #b9c1c8;
  background: var(--surface);
}

.operator-support-link strong,
.operator-support-link small {
  display: block;
}

.operator-support-link small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.86rem;
}

.operator-support-link > span:last-child,
.operator-link {
  white-space: nowrap;
}

.operator-link {
  color: var(--green-dark);
  font-weight: 720;
}

.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(310px, 0.75fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.help-panel {
  min-width: 0;
}

.help-panel > h2,
.ai-help-card h2,
.contact-status h2 {
  margin-bottom: 14px;
  letter-spacing: -0.035em;
}

.help-panel > h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.faq-list {
  margin-top: 30px;
  border-top: 1px solid var(--ink);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 23px 48px 23px 0;
  font-size: 1.02rem;
  font-weight: 760;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 22px;
  right: 4px;
  color: var(--green-dark);
  font-size: 1.35rem;
  line-height: 1;
  content: "+";
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details > div {
  padding: 0 36px 24px 0;
  color: #505862;
}

.faq-list details p {
  margin-bottom: 10px;
}

.faq-list details a {
  display: inline-flex;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--green);
  color: var(--green-dark);
  font-weight: 760;
}

.support-rail {
  display: grid;
  gap: 16px;
}

.ai-help-card,
.contact-status {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
}

.ai-help-card {
  border-color: #d8eadd;
  background: linear-gradient(160deg, #f8fcf9, #ffffff 72%);
}

.support-card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.support-card-heading .eyebrow {
  margin: 0;
}

.ai-help-card p,
.contact-status p {
  color: var(--muted);
}

.ai-input-preview {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  margin: 24px 0 12px;
}

.ai-input-preview input,
.ai-input-preview button {
  min-height: 46px;
  border: 1px solid #dfe3e6;
  border-radius: 10px;
  font: inherit;
}

.ai-input-preview input {
  min-width: 0;
  padding: 0 13px;
  background: var(--white);
  color: var(--muted);
}

.ai-input-preview button {
  padding: 0 15px;
  background: #e8ebed;
  color: #858c94;
  font-weight: 760;
}

.ai-help-card > small {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.contact-status h2 {
  font-size: 1.05rem;
}

.contact-status p {
  margin-bottom: 14px;
}

.contact-status span {
  color: var(--green-dark);
  font-size: 0.82rem;
  font-weight: 800;
}

.status-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid #d4d8dc;
  border-radius: 99px;
  background: var(--white);
  color: #555d67;
  font-size: 0.86rem;
  font-weight: 750;
}

.status-label::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #adb4bc;
  content: "";
}

.legal {
  max-width: 780px;
}

.legal h2 {
  margin: 48px 0 12px;
  font-size: 1.35rem;
  letter-spacing: -0.035em;
}

.legal p,
.legal li {
  color: #4f5660;
}

.legal ul {
  padding-left: 1.2em;
}

.legal-meta {
  margin-bottom: 42px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 38px 0 44px;
}

.footer-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
}

.footer-brand {
  margin-bottom: 7px;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.copyright {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 20px;
  color: #4e555e;
  font-size: 0.88rem;
}

.footer-links a:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (max-width: 780px) {
  .header-inner,
  .container {
    width: min(calc(100% - 32px), var(--max));
  }

  .header-inner {
    min-height: 68px;
    gap: 12px;
  }

  .brand-icon,
  .brand-index {
    display: none;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .header-actions {
    gap: 14px;
  }

  .main-nav {
    gap: 14px;
  }

  .main-nav a {
    font-size: 0.9rem;
  }

  .download-link {
    min-height: 40px;
    padding: 0 12px;
    font-size: 0.86rem;
  }

  .hero {
    padding-top: 66px;
  }

  h1 {
    font-size: clamp(2.5rem, 13vw, 4rem);
  }

  .product-stage {
    margin-top: 50px;
    border-radius: 18px;
  }

  .structure-diagram {
    padding: 24px;
  }

  .structure-network {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 28px 0;
  }

  .structure-network::before,
  .structure-network::after {
    display: none;
  }

  .structure-core {
    min-height: 126px;
    grid-row: 1;
  }

  .structure-path {
    flex-wrap: wrap;
  }

  .feature-list,
  .split-section,
  .download-panel,
  .support-card,
  .support-layout {
    grid-template-columns: 1fr;
  }

  .feature-item {
    min-height: auto;
    padding: 25px 0;
  }

  .feature-item + .feature-item {
    padding-left: 0;
    border-left: 0;
  }

  .feature-number {
    margin-bottom: 22px;
  }

  .split-section {
    gap: 26px;
  }

  .section-title {
    margin-bottom: 34px;
  }

  .news-row,
  .notice-summary {
    grid-template-columns: 82px 1fr;
    gap: 14px;
    padding: 20px 0;
  }

  .news-date {
    grid-column: 2;
  }

  .download-panel {
    gap: 28px;
  }

  .store-buttons {
    flex-direction: column;
  }

  .store-button {
    width: 100%;
  }

  .notice-body {
    padding: 26px 0 34px;
  }

  .footer-inner {
    display: grid;
    align-items: start;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .operator-support-link {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .ai-help-card,
  .contact-status {
    padding: 22px 18px;
  }

  .ai-input-preview {
    grid-template-columns: 1fr;
  }

  .ai-input-preview button {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .header-inner,
  .container {
    width: min(calc(100% - 24px), var(--max));
  }

  .header-actions,
  .main-nav {
    gap: 10px;
  }

  .download-link {
    padding: 0 10px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button-dark,
  .hero-actions .text-link {
    width: fit-content;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}