* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Noto Sans KR', sans-serif;
  color: #1f2937;
  background: #f8fafc;
  line-height: 1.6;
}

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

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

.container {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
}

.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #0f766e;
  margin-bottom: 10px;
}

.section-title {
  font-size: 42px;
  line-height: 1.25;
  margin: 0 0 12px;
  color: #0f172a;
}

.section-desc {
  font-size: 18px;
  color: #475569;
  margin: 0;
}

/* 헤더 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  color: #0f172a;
}

.logo-mark {
  color: #0f766e;
}

.header-nav {
  display: flex;
  gap: 24px;
  font-size: 15px;
  color: #334155;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 0;
  font-size: 22px;
  cursor: pointer;
}

.mobile-menu {
  display: none;
  padding: 0 20px 16px;
  background: #fff;
  border-top: 1px solid rgba(15, 23, 42, 0.06);
}

.mobile-menu a {
  display: block;
  padding: 12px 0;
  color: #334155;
}

/* 버튼 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #0f766e, #14b8a6);
  color: #fff;
  box-shadow: 0 10px 24px rgba(20, 184, 166, 0.22);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-secondary {
  background: #fff;
  color: #0f172a;
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.btn-sm {
  padding: 10px 18px;
  font-size: 14px;
}

.btn-lg {
  padding: 16px 28px;
  font-size: 16px;
}

/* 히어로 */
.hero {
  position: relative;
  padding: 100px 0 80px;
  background:
    radial-gradient(circle at top, rgba(20,184,166,0.10), transparent 38%),
    linear-gradient(180deg, #f8fffe 0%, #f8fafc 100%);
  overflow: hidden;
}

.hero-inner {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ecfeff;
  color: #0f766e;
  border: 1px solid #ccfbf1;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  background: #14b8a6;
  border-radius: 50%;
}

.hero h1 {
  margin: 22px 0 18px;
  font-size: 56px;
  line-height: 1.18;
  color: #0f172a;
}

.hero p {
  margin: 0 0 28px;
  font-size: 20px;
  color: #475569;
}

.hero-price-box {
  background: #fff;
  border-radius: 24px;
  padding: 26px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  max-width: 760px;
  margin: 0 auto 26px;
}

.price-item {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin: 8px 16px;
}

.price-item i {
  color: #14b8a6;
  font-size: 22px;
}

.price-item strong {
  display: block;
  font-size: 15px;
  color: #475569;
}

.price-item span {
  display: block;
  font-size: 22px;
  font-weight: 800;
  color: #0f172a;
}

.price-badge {
  margin-top: 16px;
  display: inline-block;
  background: #f1f5f9;
  color: #334155;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
}

.btn-wrap {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.stat-item strong {
  display: block;
  font-size: 13px;
  color: #64748b;
}

.stat-item span {
  font-size: 17px;
  font-weight: 700;
  color: #0f172a;
}

.stat-divider {
  width: 1px;
  height: 28px;
  background: rgba(15, 23, 42, 0.10);
}

/* 핵심 메시지 */
.section-message {
  background: #ffffff;
}

.message-inner {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.message-icon {
  width: 74px;
  height: 74px;
  display: grid;
  place-items: center;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ccfbf1, #f0fdfa);
  color: #0f766e;
  font-size: 28px;
}

.usage-chips {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.usage-chips span {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 14px;
  color: #334155;
}

/* 그리드 공통 */
.why-grid,
.recommend-grid,
.research-grid {
  display: grid;
  gap: 24px;
}

.why-grid {
  grid-template-columns: repeat(4, 1fr);
}

.recommend-grid {
  grid-template-columns: repeat(5, 1fr);
}

.research-grid {
  grid-template-columns: repeat(4, 1fr);
}

.why-card,
.recommend-item,
.research-card,
.feature-item,
.price-card,
.form-card,
.ref-box,
.generation-card {
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.06);
}

.why-card {
  padding: 28px 24px;
}

.why-icon,
.recommend-icon,
.feature-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(135deg, #ecfeff, #f0fdfa);
  color: #0f766e;
  font-size: 22px;
  margin-bottom: 16px;
}

.why-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.why-card p {
  margin: 0;
  color: #475569;
}

/* 추천 */
.section-recommend {
  background: #f8fafc;
}

.recommend-item {
  padding: 24px 18px;
  text-align: center;
}

.recommend-icon {
  margin: 0 auto 14px;
}

.recommend-item p {
  margin: 0;
  color: #334155;
  font-weight: 600;
}

/* 세대별 활용 */
.section-generation {
  background: linear-gradient(180deg, #f8fffe 0%, #ffffff 100%);
}

.generation-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.generation-card {
  overflow: hidden;
}

.generation-image {
  position: relative;
}

.generation-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.gen-image-overlay {
  position: absolute;
  left: 18px;
  top: 18px;
}

.gen-tag {
  background: rgba(15, 23, 42, 0.70);
  color: #fff;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.generation-content {
  padding: 24px;
}

.generation-content h3 {
  margin: 0 0 12px;
  font-size: 26px;
  color: #0f172a;
}

.generation-content p {
  margin: 0 0 16px;
  color: #475569;
}

.gen-keywords {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.gen-keywords span {
  background: #ecfeff;
  color: #0f766e;
  border: 1px solid #ccfbf1;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.summary-box {
  max-width: 840px;
  margin: 32px auto 0;
  text-align: center;
  padding: 28px;
  background: linear-gradient(135deg, #ecfeff, #f8fffe);
  border: 1px solid #ccfbf1;
  border-radius: 24px;
}

.summary-box i {
  color: #14b8a6;
  font-size: 20px;
}

.summary-box p {
  margin: 12px 0 0;
  font-size: 18px;
  color: #334155;
}

/* 특징 */
.section-features {
  background: #ffffff;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.feature-item {
  padding: 22px 18px;
  text-align: center;
}

.feature-icon {
  margin: 0 auto 12px;
}

.feature-item span {
  font-weight: 700;
  color: #0f172a;
}

/* 가격 */
.section-price {
  background: #f8fafc;
}

.price-card-wrap {
  display: flex;
  justify-content: center;
}

.price-card {
  max-width: 760px;
  width: 100%;
  padding: 34px;
}

.price-product-badge {
  display: inline-block;
  background: #ecfeff;
  color: #0f766e;
  border: 1px solid #ccfbf1;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.price-card h3 {
  margin: 16px 0 8px;
  font-size: 34px;
}

.price-card-sub {
  margin: 0 0 24px;
  color: #475569;
}

.price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid #e2e8f0;
}

.price-label {
  font-weight: 700;
  color: #334155;
}

.price-value {
  font-size: 22px;
  font-weight: 800;
  color: #0f172a;
}

.price-row--main .price-value {
  color: #0f766e;
  font-size: 28px;
}

.monthly em {
  font-style: normal;
  font-size: 15px;
  color: #64748b;
  margin-left: 4px;
}

.line-through {
  text-decoration: line-through;
  color: #94a3b8;
}

.price-notice ul {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
}

.price-notice li {
  margin: 10px 0;
  color: #334155;
}

.price-notice i {
  margin-right: 8px;
  color: #14b8a6;
}

.price-cta {
  margin-top: 24px;
}

/* 리서치 */
.section-research {
  background: #ffffff;
}

.research-card {
  padding: 24px;
}

.research-num {
  font-size: 14px;
  font-weight: 800;
  color: #0f766e;
  margin-bottom: 10px;
}

.research-card h4 {
  margin: 0 0 10px;
  font-size: 24px;
}

.research-en {
  font-size: 14px;
  color: #64748b;
  font-style: normal;
  margin-left: 6px;
}

.research-headline {
  font-weight: 700;
  color: #0f172a;
  margin: 0 0 8px;
}

.research-sub {
  color: #0f766e;
  font-weight: 600;
  margin: 0 0 14px;
}

.research-card p:last-child {
  color: #475569;
  margin: 0;
}

/* 폼 */
.section-form {
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.form-card {
  max-width: 920px;
  margin: 0 auto;
  padding: 32px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  display: block;
  margin-bottom: 10px;
  font-weight: 700;
  color: #334155;
}

.required {
  color: #dc2626;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  border: 1px solid #dbe4ee;
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
  background: #fff;
  color: #0f172a;
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.field-hint {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  color: #64748b;
}

.form-bottom {
  margin-top: 28px;
  text-align: center;
}

.form-privacy {
  color: #64748b;
  font-size: 14px;
}

.form-success {
  text-align: center;
  padding: 40px 20px;
}

.form-success-icon {
  font-size: 54px;
  color: #16a34a;
  margin-bottom: 16px;
}

/* 추천 */
.section-referral {
  background: #f8fafc;
}

.ref-box {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  padding: 32px;
}

.ref-box-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, #ecfeff, #f0fdfa);
  color: #0f766e;
  font-size: 28px;
}

.ref-code-display {
  margin-top: 22px;
  padding: 20px;
  border-radius: 18px;
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
}

.ref-code-label {
  font-size: 13px;
  color: #64748b;
  margin-bottom: 8px;
}

.ref-code-value {
  font-size: 24px;
  font-weight: 800;
  color: #0f172a;
}

/* 푸터 */
.site-footer {
  background: #0f172a;
  color: #e2e8f0;
  padding: 36px 0;
}

.footer-inner {
  text-align: center;
}

.footer-logo {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 16px;
}

.footer-info p,
.footer-copy p {
  margin: 6px 0;
}

/* 상단 버튼 */
.scroll-top-btn {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 52px;
  height: 52px;
  border: 0;
  border-radius: 50%;
  background: #0f766e;
  color: #fff;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.3);
}

/* 반응형 */
@media (max-width: 1100px) {
  .why-grid,
  .research-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .recommend-grid,
  .feature-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .mobile-menu-btn {
    display: block;
  }

  .mobile-menu.open {
    display: block;
  }

  .hero h1 {
    font-size: 40px;
  }

  .section-title {
    font-size: 32px;
  }

  .generation-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 64px 0;
  }

  .hero {
    padding: 84px 0 64px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero p,
  .section-desc {
    font-size: 16px;
  }

  .btn-wrap {
    flex-direction: column;
  }

  .why-grid,
  .recommend-grid,
  .research-grid,
  .feature-list {
    grid-template-columns: 1fr;
  }

  .price-item {
    display: flex;
    margin: 12px 0;
  }

  .price-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .generation-image img {
    height: 240px;
  }

  .form-card,
  .price-card,
  .ref-box {
    padding: 24px;
  }
}