:root {
  --gpro-ink: #172033;
  --gpro-muted: #66758a;
  --gpro-soft: #edf4fb;
  --gpro-line: #dce6f2;
  --gpro-blue: #1769d7;
  --gpro-blue-dark: #123c76;
  --gpro-red: #e06070;
  --gpro-panel: #ffffff;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #f2f5f8;
  color: var(--gpro-ink);
  font-family: "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
  line-height: 1.75;
}

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

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

.seo-nav {
  align-items: center;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--gpro-line);
  display: flex;
  gap: 20px;
  justify-content: space-between;
  padding: 14px 24px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.seo-brand {
  align-items: center;
  color: var(--gpro-ink);
  display: inline-flex;
  font-weight: 900;
  gap: 10px;
  min-width: 0;
}

.seo-brand img {
  height: 34px;
  width: 34px;
}

.seo-nav-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.seo-nav-links a {
  border: 1px solid transparent;
  border-radius: 8px;
  color: #36506f;
  font-size: 14px;
  font-weight: 800;
  padding: 8px 10px;
}

.seo-nav-links a.primary {
  background: var(--gpro-blue);
  color: #ffffff;
}

.seo-hero {
  background: linear-gradient(135deg, #101827 0%, #142238 58%, #1d3e67 100%);
  color: #ffffff;
  overflow: hidden;
  padding: 74px 24px 58px;
}

.seo-hero-inner {
  align-items: center;
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.92fr);
  margin: 0 auto;
  max-width: 1120px;
}

.seo-breadcrumb {
  color: #b7c9df;
  display: flex;
  flex-wrap: wrap;
  font-size: 13px;
  font-weight: 800;
  gap: 8px;
  margin-bottom: 18px;
}

.seo-kicker {
  color: #93c5fd;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  margin-bottom: 10px;
}

.seo-hero h1 {
  font-size: clamp(26px, 8vw, 48px);
  line-height: 1.25;
  letter-spacing: 0;
  margin-bottom: 18px;
  word-break: keep-all;
}

.seo-hero h1 span {
  color: #7db4ff;
}

.seo-hero-copy {
  color: #d6e3f3;
  font-size: 17px;
  max-width: 760px;
  word-break: keep-all;
}

.seo-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.seo-button {
  align-items: center;
  background: var(--gpro-blue);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  color: #ffffff;
  display: inline-flex;
  font-size: 15px;
  font-weight: 900;
  justify-content: center;
  min-height: 46px;
  padding: 10px 16px;
}

.seo-button.secondary {
  background: #ffffff;
  color: var(--gpro-blue-dark);
}

.seo-hero-panel {
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  color: var(--gpro-ink);
  overflow: hidden;
  box-shadow: 0 24px 52px rgba(0, 0, 0, 0.26);
}

.seo-hero-panel img {
  background: #ffffff;
  border-bottom: 1px solid var(--gpro-line);
  height: 260px;
  object-fit: cover;
  object-position: center;
  width: 100%;
}

.seo-panel-body {
  display: grid;
  gap: 10px;
  padding: 18px;
}

.seo-panel-body strong {
  font-size: 18px;
}

.seo-panel-body p {
  color: var(--gpro-muted);
  font-size: 14px;
}

.seo-section {
  padding: 66px 24px;
}

.seo-section.alt {
  background: var(--gpro-soft);
  border-bottom: 1px solid var(--gpro-line);
  border-top: 1px solid var(--gpro-line);
}

.seo-wrap {
  margin: 0 auto;
  max-width: 1120px;
}

.seo-section h2 {
  color: var(--gpro-ink);
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.35;
  margin-bottom: 12px;
  word-break: keep-all;
}

.seo-section-lead {
  color: var(--gpro-muted);
  font-size: 16px;
  margin-bottom: 28px;
  max-width: 840px;
  word-break: keep-all;
}

.seo-copy {
  color: #46566c;
  display: grid;
  font-size: 16px;
  gap: 14px;
  line-height: 1.85;
  max-width: 900px;
  word-break: keep-all;
}

.seo-copy + .seo-grid,
.seo-copy + .seo-flow,
.seo-copy + .seo-note {
  margin-top: 28px;
}

.seo-copy a {
  color: var(--gpro-blue);
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.seo-note {
  background: #ffffff;
  border: 1px solid var(--gpro-line);
  border-left: 4px solid var(--gpro-blue);
  border-radius: 8px;
  color: #46566c;
  display: grid;
  gap: 8px;
  margin-top: 20px;
  padding: 18px;
}

.seo-note strong {
  color: var(--gpro-ink);
}

.seo-check-list {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.seo-check-list li {
  background: #ffffff;
  border: 1px solid var(--gpro-line);
  border-radius: 8px;
  color: #46566c;
  list-style: none;
  padding: 14px 16px;
}

.seo-check-list strong {
  color: var(--gpro-ink);
}

.seo-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.seo-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.seo-card {
  background: var(--gpro-panel);
  border: 1px solid var(--gpro-line);
  border-radius: 8px;
  box-shadow: 0 14px 32px rgba(31, 41, 55, 0.06);
  padding: 22px;
}

.seo-card strong,
.seo-card h3 {
  color: var(--gpro-ink);
  display: block;
  font-size: 18px;
  line-height: 1.45;
  margin-bottom: 8px;
}

.seo-card p,
.seo-card li {
  color: var(--gpro-muted);
  font-size: 14px;
}

.seo-card ul,
.seo-card ol {
  display: grid;
  gap: 8px;
  padding-left: 18px;
}

.seo-flow {
  counter-reset: seo-step;
  display: grid;
  gap: 12px;
}

.seo-step {
  align-items: start;
  background: #ffffff;
  border: 1px solid var(--gpro-line);
  border-radius: 8px;
  display: grid;
  gap: 14px;
  grid-template-columns: 44px minmax(0, 1fr);
  padding: 18px;
}

.seo-step::before {
  align-items: center;
  background: var(--gpro-blue);
  border-radius: 8px;
  color: #ffffff;
  content: counter(seo-step);
  counter-increment: seo-step;
  display: flex;
  font-weight: 900;
  height: 38px;
  justify-content: center;
  width: 38px;
}

.seo-step strong {
  display: block;
  line-height: 1.45;
  margin-bottom: 4px;
}

.seo-step p {
  color: var(--gpro-muted);
  font-size: 14px;
}

.seo-link-list {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.seo-link-list a {
  background: #ffffff;
  border: 1px solid var(--gpro-line);
  border-radius: 8px;
  color: #36506f;
  font-size: 14px;
  font-weight: 900;
  min-height: 60px;
  padding: 14px;
}

.seo-faq {
  display: grid;
  gap: 10px;
}

.seo-faq details {
  background: #ffffff;
  border: 1px solid var(--gpro-line);
  border-radius: 8px;
  padding: 16px 18px;
}

.seo-faq summary {
  color: var(--gpro-ink);
  cursor: pointer;
  font-weight: 900;
}

.seo-faq p {
  color: var(--gpro-muted);
  font-size: 14px;
  margin-top: 10px;
}

.seo-cta {
  background: linear-gradient(135deg, #1769d7 0%, #123c76 100%);
  color: #ffffff;
}

.seo-cta h2 {
  color: #ffffff;
}

.seo-cta .seo-section-lead {
  color: #d8e8ff;
}

.seo-cta .seo-button {
  background: #ffffff;
  color: var(--gpro-blue-dark);
}

.seo-cta .seo-button.secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.72);
  color: #ffffff;
}

.seo-footer {
  background: #ffffff;
  border-top: 1px solid var(--gpro-line);
  color: var(--gpro-muted);
  font-size: 13px;
  padding: 28px 24px;
}

.seo-footer-inner {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1120px;
}

.seo-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.seo-footer a {
  color: #36506f;
  font-weight: 800;
}

.floating-contact {
  bottom: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: fixed;
  right: 20px;
  z-index: 30;
}

.floating-contact a,
.floating-contact button {
  align-items: center;
  background: var(--gpro-blue);
  border: 1px solid rgba(23, 105, 215, 0.16);
  border-radius: 50%;
  box-shadow: 0 12px 26px rgba(23, 105, 215, 0.28);
  color: #ffffff;
  cursor: pointer;
  display: inline-flex;
  height: 52px;
  justify-content: center;
  padding: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  width: 52px;
}

.floating-contact a:hover,
.floating-contact button:hover {
  box-shadow: 0 16px 32px rgba(23, 105, 215, 0.34);
  transform: translateY(-2px);
}

.floating-contact img,
.floating-contact svg {
  display: block;
  height: 24px;
  width: 24px;
}

.floating-contact a.kakao {
  background: #fee500;
  border-color: rgba(38, 31, 0, 0.1);
  color: #261f00;
}

.floating-contact a.telegram {
  background: #229ed9;
}

/* 맨 위로 — 꽉 찬 면 대신 배경이 비치는 유리판에 홑화살표(^)만 둔다.
   완전 투명으로 두면 어두운 구간에서 화살표가 사라지므로 흐릿한 흰 판을 얇게 깐다. */
.floating-contact .to-top {
  background: rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(23, 105, 215, 0.26);
  color: var(--gpro-blue);
  box-shadow: 0 6px 18px rgba(13, 30, 58, 0.1);
  line-height: 1;
}

.floating-contact .to-top svg {
  display: block;
  width: 18px;
  height: 18px;
}

.floating-contact .to-top:hover {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(23, 105, 215, 0.52);
  box-shadow: 0 10px 24px rgba(13, 30, 58, 0.16);
}

@media (max-width: 920px) {
  .seo-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .seo-nav-links {
    justify-content: flex-start;
  }

  .seo-hero-inner,
  .seo-grid,
  .seo-grid.two,
  .seo-link-list {
    grid-template-columns: 1fr;
  }

  .seo-hero {
    padding-top: 46px;
  }

  .seo-hero-panel img {
    height: auto;
    max-height: 260px;
    object-fit: contain;
  }
}

@media (max-width: 560px) {
  .seo-nav,
  .seo-hero,
  .seo-section,
  .seo-footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .seo-nav-links a {
    font-size: 13px;
    padding: 7px 8px;
  }

  .seo-hero-copy,
  .seo-section-lead {
    font-size: 15px;
  }

  .seo-step {
    grid-template-columns: 1fr;
  }

  .floating-contact {
    bottom: 14px;
    right: 14px;
  }

  .floating-contact a,
  .floating-contact button {
    height: 48px;
    width: 48px;
  }
}

/* ==========================================================================
   실기기 모바일 대응 (360~440px)
   갤럭시 S25 360 · S25 울트라 384 · 아이폰 15/15 Pro 393
   · 15 Pro Max 430 · 16 Pro Max 440
   ========================================================================== */

/* 한글이 단어 중간에서 잘리지 않도록 */
.seo-card p,
.seo-card li,
.seo-step p,
.seo-faq p,
.seo-faq summary,
.seo-check-list li,
.seo-section-lead,
.seo-note,
.seo-hero p {
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* 터치 대상 최소 44px */
.seo-nav-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.seo-faq summary {
  min-height: 44px;
  display: flex;
  align-items: center;
}

@media (max-width: 440px) {
  .seo-shell,
  .seo-section {
    padding-left: 18px;
    padding-right: 18px;
  }
  .seo-hero h2,
  .seo-section h2 {
    font-size: clamp(20px, 5.6vw, 26px);
  }
  .seo-hero p,
  .seo-section-lead {
    font-size: clamp(14.5px, 4vw, 16.5px);
  }
  .seo-card h3 {
    font-size: clamp(16px, 4.4vw, 18px);
  }
  .seo-card p,
  .seo-card li,
  .seo-step p {
    font-size: clamp(13.5px, 3.8vw, 15px);
  }
  .seo-button {
    font-size: clamp(14px, 4vw, 16px);
    padding: 14px 16px;
  }
}

@media (max-width: 380px) {
  .seo-shell,
  .seo-section {
    padding-left: 14px;
    padding-right: 14px;
  }
  .seo-button {
    padding: 13px 12px;
  }
}