:root {
  --navy: #23408e;
  --teal: #0b8a7b;
  --accent: #0b7a6d;
  --accent-strong: #08584f;
  --aqua: #3cc6bc;
  --orange: #ff7a45;
  --ink: #1b2436;
  --muted: #5e6678;
  --line: #dde2ea;
  --soft: #f3f7f8;
  --surface: #ffffff;
  --radius: 22px;
  font-family:
    'Pretendard', 'Apple SD Gothic Neo', 'Malgun Gothic', 'Noto Sans KR', system-ui, sans-serif;
  color: var(--ink);
  background: var(--surface);
  -webkit-text-size-adjust: 100%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--surface);
  line-height: 1.6;
  word-break: keep-all;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
}

.wrap {
  width: min(1120px, 100% - 32px);
  margin-inline: auto;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 800;
}

.section-title {
  margin: 0 0 28px;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  text-align: center;
  letter-spacing: -0.02em;
}

/* 머리글 */
.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid rgb(221 226 234 / 70%);
  background: rgb(255 255 255 / 92%);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand img {
  border-radius: 9px;
}

.site-nav {
  display: flex;
  gap: 20px;
  margin-left: auto;
}

.site-nav a {
  color: var(--muted);
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--accent);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
  text-decoration: none;
}

.button--small {
  padding: 8px 16px;
  font-size: 0.92rem;
}

/* 첫 화면 */
.hero {
  overflow: hidden;
  background: linear-gradient(135deg, #0b8a7b 0%, #0b6f74 55%, #23408e 100%);
  color: #ffffff;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 40px;
  padding: 72px 0 0;
}

.hero .eyebrow {
  color: #bff0ea;
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 28px;
  color: #e6f6f3;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
}

.hero__actions {
  display: grid;
  justify-items: start;
  gap: 10px;
  padding-bottom: 72px;
}

.hero__note {
  margin: 0;
  color: #cfeee9;
  font-size: 0.92rem;
}

.hero__visual {
  align-self: end;
  justify-self: center;
  width: min(360px, 80vw);
  margin-bottom: -120px;
  filter: drop-shadow(0 24px 40px rgb(0 0 0 / 35%));
}

.play-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 22px 10px 16px;
  border-radius: 14px;
  background: #0f1b2e;
  color: #ffffff;
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.1;
  text-decoration: none;
}

.play-button small {
  display: block;
  color: #c9d2e3;
  font-size: 0.72rem;
  font-weight: 600;
}

.play-button--light {
  background: #ffffff;
  color: var(--ink);
}

.play-button--light small {
  color: var(--muted);
}

/* 시작 단계 */
.steps {
  padding: 168px 0 72px;
  background: var(--soft);
}

.steps__list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps__list li {
  display: grid;
  gap: 6px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  counter-increment: step;
}

.steps__list li::before {
  content: counter(step);
  display: grid;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
  place-items: center;
}

.steps__list strong {
  font-size: 1.15rem;
}

.steps__list span {
  color: var(--muted);
}

/* 기능 */
.feature {
  padding: 88px 0;
}

.feature--alt {
  background: var(--soft);
}

.feature__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
}

.feature__inner--reverse .feature__copy {
  order: 2;
}

.feature h2 {
  margin: 0 0 20px;
  font-size: clamp(1.7rem, 4.2vw, 2.4rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.checks {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.checks li {
  position: relative;
  padding-left: 30px;
  color: #374055;
  font-size: 1.05rem;
}

.checks li::before {
  content: '';
  position: absolute;
  top: 0.45em;
  left: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--aqua);
  box-shadow: inset 0 0 0 5px #d8f5f2;
}

.feature__phone {
  justify-self: center;
  width: min(320px, 80vw);
  filter: drop-shadow(0 18px 30px rgb(15 27 46 / 22%));
}

.feature__phones {
  display: flex;
  justify-content: center;
  gap: 18px;
}

.feature__phones img {
  width: min(250px, 42vw);
  filter: drop-shadow(0 18px 30px rgb(15 27 46 / 22%));
}

.feature__phones img:nth-child(2) {
  margin-top: 48px;
}

/* 개인정보 */
.privacy {
  padding: 88px 0;
  background: linear-gradient(180deg, #0b6f74, #23408e);
  color: #ffffff;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 26px;
  border: 1px solid rgb(255 255 255 / 22%);
  border-radius: var(--radius);
  background: rgb(255 255 255 / 10%);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.card p {
  margin: 0;
  color: #e3eef6;
}

/* 질문 */
.faq {
  padding: 88px 0;
}

.faq .wrap {
  max-width: 760px;
}

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

.faq summary {
  cursor: pointer;
  padding: 20px 4px;
  font-size: 1.1rem;
  font-weight: 800;
  list-style: none;
}

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

.faq summary::after {
  content: '+';
  float: right;
  color: var(--accent);
  font-size: 1.4rem;
  line-height: 1;
}

.faq details[open] summary::after {
  content: '−';
}

.faq details p {
  margin: 0 4px 20px;
  color: var(--muted);
}

/* 마지막 안내 */
.cta {
  padding: 72px 0;
  background: linear-gradient(135deg, #0b8a7b, #23408e);
  color: #ffffff;
  text-align: center;
}

.cta__inner {
  display: grid;
  justify-items: center;
  gap: 18px;
}

.cta img {
  border-radius: 18px;
}

.cta h2 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
}

/* 바닥글 */
.site-footer {
  padding: 36px 0 48px;
  background: #0f1b2e;
  color: #9aa6bd;
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0 0 10px;
}

.site-footer a {
  color: #dbe4f3;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

@media (max-width: 860px) {
  .site-nav {
    display: none;
  }

  .site-header .button {
    margin-left: auto;
  }

  .hero__inner,
  .feature__inner {
    grid-template-columns: 1fr;
  }

  .hero__inner {
    padding-top: 48px;
    text-align: left;
  }

  .hero__actions {
    padding-bottom: 40px;
  }

  .feature__inner--reverse .feature__copy {
    order: 0;
  }

  .steps {
    padding-top: 150px;
  }

  .steps__list,
  .cards {
    grid-template-columns: 1fr;
  }

  .feature {
    padding: 64px 0;
  }
}

.center {
  text-align: center;
}