/**
 * service-cs.css
 * /services/cs — 한국어 CS 서비스 페이지
 * CSS 네임스페이스: cs-*
 * 모바일 반응형: ≤768px 40px, ≤480px 32px 기준
 */

/* ──────────────────────────────────────────
   CSS Variables
────────────────────────────────────────── */
:root {
  --cs-canvas:      #ffffff;
  --cs-ice:         #f6f9fc;
  --cs-border:      #e3e8ee;
  --cs-teal:        #0d9488;
  --cs-blue:        #1d4ed8;
  --cs-accent:      #0d253d;
  --cs-text:        #0d253d;
  --cs-muted:       #64748d;
  --cs-radius:      12px;
  --cs-radius-sm:   8px;
  --cs-radius-pill: 9999px;
}


/* ══════════════════════════════════════
   HERO
══════════════════════════════════════ */
.cs-hero {
  background: var(--cs-canvas);
  padding: 96px 0 80px;
  border-bottom: 1px solid var(--cs-border);
}
.cs-hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: start;
}

/* Left */
.cs-hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--cs-teal);
  margin: 0 0 16px;
}
.cs-hero-h1 {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--cs-accent);
  margin: 0 0 20px;
  letter-spacing: -.02em;
}
.cs-hero-h1 em {
  font-style: normal;
  background: linear-gradient(90deg, #0d9488, #1d4ed8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cs-hero-sub {
  font-size: 17px;
  line-height: 1.7;
  color: var(--cs-muted);
  margin: 0 0 36px;
  max-width: 540px;
}

/* Hero Blocks */
.cs-hero-blocks {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cs-hero-block {
  background: var(--cs-ice);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-sm);
  padding: 16px 20px;
}
.cs-hero-block-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--cs-teal);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 8px;
}
.cs-hero-block-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--cs-text);
}
.cs-hero-checklist {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.cs-hero-checklist li {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--cs-text);
  padding-left: 18px;
  position: relative;
}
.cs-hero-checklist li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--cs-teal);
  font-weight: 700;
}

/* Right — KPI Cards */
.cs-hero-right {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cs-hero-kpi-card {
  background: var(--cs-accent);
  color: #fff;
  border-radius: var(--cs-radius-sm);
  padding: 20px 24px;
}
.cs-hero-kpi-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  opacity: .6;
  margin-bottom: 6px;
}
.cs-hero-kpi-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1;
  margin-bottom: 4px;
}
.cs-hero-kpi-sub {
  font-size: 12px;
  opacity: .65;
  line-height: 1.4;
}

/* ══════════════════════════════════════
   WHY — 3 Split Steps
══════════════════════════════════════ */
.cs-why {
  background: var(--cs-canvas);
  padding: 96px 0;
}
.cs-why-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}
.cs-why-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--cs-teal);
  margin: 0 0 16px;
  text-align: center;
}
.cs-why-h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--cs-accent);
  text-align: center;
  margin: 0 0 72px;
  line-height: 1.2;
  letter-spacing: -.02em;
}

/* Step rows */
.cs-why-step {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--cs-border);
}
.cs-why-step:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}
.cs-why-step--reverse {
  grid-template-columns: 400px 1fr;
}
.cs-why-step--reverse .cs-why-step-text {
  order: 2;
}
.cs-why-step--reverse .cs-why-step-visual {
  order: 1;
}

.cs-why-step-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cs-teal);
  margin-bottom: 12px;
}
.cs-why-step-h3 {
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  color: var(--cs-accent);
  margin: 0 0 16px;
  letter-spacing: -.01em;
  line-height: 1.25;
}
.cs-why-step-desc {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--cs-muted);
  margin: 0 0 20px;
}
.cs-why-step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cs-why-step-list li {
  font-size: 14px;
  color: var(--cs-text);
  padding-left: 22px;
  position: relative;
  line-height: 1.5;
}
.cs-why-step-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--cs-teal);
  font-weight: 700;
}

/* Step visual card */
.cs-why-step-card {
  background: var(--cs-ice);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 36px 32px;
  text-align: center;
}
.cs-why-step-card--alt {
  background: var(--cs-accent);
  border-color: transparent;
}
.cs-why-step-card--alt .cs-step-card-title {
  color: #fff;
}
.cs-why-step-card--alt .cs-step-card-item {
  color: rgba(255,255,255,.85);
  border-color: rgba(255,255,255,.15);
}
.cs-step-card-icon {
  font-size: 40px;
  margin-bottom: 16px;
}
.cs-step-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--cs-accent);
  margin-bottom: 20px;
}
.cs-step-card-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cs-step-card-item {
  font-size: 14px;
  color: var(--cs-text);
  background: var(--cs-canvas);
  border: 1px solid var(--cs-border);
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 500;
}

/* ══════════════════════════════════════
   CHANNEL — 채널별 CS 처리 방식
══════════════════════════════════════ */
.cs-channel {
  background: var(--cs-ice);
  padding: 96px 0;
  border-top: 1px solid var(--cs-border);
  border-bottom: 1px solid var(--cs-border);
}
.cs-channel-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}
.cs-channel-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--cs-teal);
  margin: 0 0 16px;
  text-align: center;
}
.cs-channel-h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--cs-accent);
  text-align: center;
  margin: 0 0 16px;
  line-height: 1.2;
  letter-spacing: -.02em;
}
.cs-channel-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--cs-muted);
  text-align: center;
  margin: 0 auto 56px;
  max-width: 600px;
}

.cs-channel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.cs-channel-card {
  background: var(--cs-canvas);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 28px 24px;
  transition: box-shadow .2s, transform .2s;
}
.cs-channel-card:hover {
  box-shadow: 0 8px 32px rgba(13,37,61,.1);
  transform: translateY(-2px);
}

/* Channel Badges */
.cs-channel-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 14px;
}
.cs-channel-badge--coupang {
  background: #fee2e2;
  color: #b91c1c;
}
.cs-channel-badge--naver {
  background: #dcfce7;
  color: #15803d;
}
.cs-channel-badge--kakao {
  background: #fef9c3;
  color: #854d0e;
}
.cs-channel-badge--etc {
  background: #e0e7ff;
  color: #3730a3;
}

.cs-channel-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--cs-accent);
  margin: 0 0 10px;
}
.cs-channel-card-desc {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--cs-muted);
  margin: 0 0 16px;
}
.cs-channel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.cs-channel-list li {
  font-size: 13px;
  color: var(--cs-text);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}
.cs-channel-list li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--cs-teal);
  font-weight: 900;
}

/* ══════════════════════════════════════
   PROCESS — 4단계
══════════════════════════════════════ */
.cs-process {
  background: var(--cs-canvas);
  padding: 96px 0;
}
.cs-process-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}
.cs-process-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--cs-teal);
  margin: 0 0 16px;
  text-align: center;
}
.cs-process-h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--cs-accent);
  text-align: center;
  margin: 0 0 56px;
  line-height: 1.2;
  letter-spacing: -.02em;
}

.cs-process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cs-process-step {
  background: var(--cs-ice);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 32px 24px;
  position: relative;
}
.cs-process-num {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--cs-teal);
  margin-bottom: 14px;
}
.cs-process-step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--cs-accent);
  margin: 0 0 12px;
}
.cs-process-step-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--cs-muted);
  margin: 0 0 16px;
}
.cs-process-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--cs-teal);
  background: rgba(13,148,136,.08);
  border: 1px solid rgba(13,148,136,.2);
  border-radius: 6px;
  padding: 4px 10px;
  letter-spacing: .03em;
}

/* ══════════════════════════════════════
   INCLUDES — 2열 8카드
══════════════════════════════════════ */
.cs-includes {
  background: var(--cs-ice);
  padding: 96px 0;
  border-top: 1px solid var(--cs-border);
  border-bottom: 1px solid var(--cs-border);
}
.cs-includes-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}
.cs-includes-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--cs-teal);
  margin: 0 0 16px;
  text-align: center;
}
.cs-includes-h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--cs-accent);
  text-align: center;
  margin: 0 0 56px;
  line-height: 1.2;
  letter-spacing: -.02em;
}

.cs-includes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.cs-includes-card {
  background: var(--cs-canvas);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow .2s, transform .2s;
}
.cs-includes-card:hover {
  box-shadow: 0 6px 24px rgba(13,37,61,.08);
  transform: translateY(-2px);
}
.cs-includes-icon {
  font-size: 28px;
}
.cs-includes-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--cs-accent);
  margin: 0;
}
.cs-includes-card-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--cs-muted);
  margin: 0;
}

/* ══════════════════════════════════════
   PLAN LINK
══════════════════════════════════════ */
.cs-plan-link {
  background: var(--cs-canvas);
  padding: 96px 0;
}
.cs-plan-link-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}
.cs-plan-link-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--cs-teal);
  margin: 0 0 16px;
  text-align: center;
}
.cs-plan-link-h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--cs-accent);
  text-align: center;
  margin: 0 0 56px;
  line-height: 1.2;
  letter-spacing: -.02em;
}

.cs-plan-link-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.cs-plan-link-card {
  background: var(--cs-ice);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cs-plan-link-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 4px 10px;
  border-radius: 6px;
  width: fit-content;
}
.cs-plan-link-badge--a {
  background: #dbeafe;
  color: #1d4ed8;
}
.cs-plan-link-badge--b {
  background: #f3e8ff;
  color: #7c3aed;
}
.cs-plan-link-badge--cd {
  background: #dcfce7;
  color: #15803d;
}
.cs-plan-link-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--cs-accent);
  margin: 0;
}
.cs-plan-link-card-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--cs-muted);
  margin: 0;
  flex: 1;
}
.cs-plan-link-btn {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--cs-teal);
  text-decoration: none;
  padding: 8px 0;
  border-top: 1px solid var(--cs-border);
  margin-top: auto;
  transition: color .2s;
}
.cs-plan-link-btn:hover {
  color: var(--cs-blue);
}

/* ══════════════════════════════════════
   FAQ
══════════════════════════════════════ */
.cs-faq {
  background: var(--cs-ice);
  padding: 96px 0;
  border-top: 1px solid var(--cs-border);
  border-bottom: 1px solid var(--cs-border);
}
.cs-faq-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}
.cs-faq-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--cs-teal);
  margin: 0 0 16px;
  text-align: center;
}
.cs-faq-h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--cs-accent);
  text-align: center;
  margin: 0 0 56px;
  line-height: 1.2;
  letter-spacing: -.02em;
}

.cs-faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cs-faq-item {
  background: var(--cs-canvas);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-sm);
  overflow: hidden;
  transition: box-shadow .2s;
}
.cs-faq-item[open] {
  box-shadow: 0 4px 20px rgba(13,37,61,.07);
}
.cs-faq-q {
  font-size: 16px;
  font-weight: 600;
  color: var(--cs-accent);
  padding: 20px 24px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: color .15s;
}
.cs-faq-q::-webkit-details-marker { display: none; }
.cs-faq-q::after {
  content: '+';
  font-size: 20px;
  font-weight: 300;
  color: var(--cs-teal);
  flex-shrink: 0;
  margin-left: 12px;
  transition: transform .2s;
}
.cs-faq-item[open] .cs-faq-q::after {
  transform: rotate(45deg);
}
.cs-faq-q:hover {
  color: var(--cs-teal);
}
.cs-faq-a {
  padding: 0 24px 20px;
  border-top: 1px solid var(--cs-border);
}
.cs-faq-a p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--cs-muted);
  margin: 16px 0 0;
}

/* ══════════════════════════════════════
   CTA
══════════════════════════════════════ */
.cs-cta {
  background: linear-gradient(135deg, #0d9488 0%, #1d4ed8 100%);
  padding: 100px 0;
  text-align: center;
}
.cs-cta-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px;
}
.cs-cta-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: rgba(255,255,255,.7);
  margin: 0 0 16px;
}
.cs-cta-h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  color: #fff;
  margin: 0 0 20px;
  line-height: 1.2;
  letter-spacing: -.02em;
}
.cs-cta-desc {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,.8);
  margin: 0 0 40px;
}
.cs-cta-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cs-cta-btn-primary {
  display: inline-block;
  background: #fff;
  color: #0d9488;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 10px;
  text-decoration: none;
  transition: opacity .2s, transform .2s;
  white-space: nowrap;
}
.cs-cta-btn-primary:hover {
  opacity: .92;
  transform: translateY(-1px);
}
.cs-cta-btn-secondary {
  display: inline-block;
  background: rgba(255,255,255,.15);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: 10px;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,.3);
  transition: background .2s;
  white-space: nowrap;
}
.cs-cta-btn-secondary:hover {
  background: rgba(255,255,255,.25);
}

/* ══════════════════════════════════════
   RESPONSIVE — ≤768px (40px 기준)
══════════════════════════════════════ */
@media (max-width: 768px) {
  /* Hero */
  .cs-hero { padding: 72px 0 40px; }
  .cs-hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cs-hero-right {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .cs-hero-kpi-card { padding: 16px 18px; }
  .cs-hero-kpi-value { font-size: 22px; }

  /* Why */
  .cs-why { padding: 40px 0; }
  .cs-why-h2 { margin-bottom: 40px; }
  .cs-why-step {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 40px;
    padding-bottom: 40px;
  }
  .cs-why-step--reverse {
    grid-template-columns: 1fr;
  }
  .cs-why-step--reverse .cs-why-step-text { order: 1; }
  .cs-why-step--reverse .cs-why-step-visual { order: 2; }

  /* Channel */
  .cs-channel { padding: 40px 0; }
  .cs-channel-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  /* Process */
  .cs-process { padding: 40px 0; }
  .cs-process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  /* Includes */
  .cs-includes { padding: 40px 0; }
  .cs-includes-grid { grid-template-columns: 1fr; gap: 14px; }

  /* Plan Link */
  .cs-plan-link { padding: 40px 0; }
  .cs-plan-link-grid { grid-template-columns: 1fr; gap: 16px; }

  /* FAQ */
  .cs-faq { padding: 40px 0; }
  .cs-faq-h2 { margin-bottom: 32px; }

  /* CTA */
  .cs-cta { padding: 64px 0; }
}

/* ══════════════════════════════════════
   RESPONSIVE — ≤480px (32px 기준)
══════════════════════════════════════ */
@media (max-width: 480px) {
  /* Hero */
  .cs-hero { padding: 64px 0 32px; }
  .cs-hero-right {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  /* Why */
  .cs-why { padding: 32px 0; }
  .cs-why-step {
    margin-bottom: 32px;
    padding-bottom: 32px;
    gap: 20px;
  }

  /* Channel */
  .cs-channel { padding: 32px 0; }
  .cs-channel-grid { grid-template-columns: 1fr; gap: 12px; }

  /* Process */
  .cs-process { padding: 32px 0; }
  .cs-process-grid { grid-template-columns: 1fr; gap: 12px; }

  /* Includes */
  .cs-includes { padding: 32px 0; }

  /* Plan Link */
  .cs-plan-link { padding: 32px 0; }

  /* FAQ */
  .cs-faq { padding: 32px 0; }
  .cs-faq-q { font-size: 15px; padding: 16px 20px; }
  .cs-faq-a { padding: 0 20px 16px; }

  /* CTA */
  .cs-cta { padding: 48px 0; }
  .cs-cta-btns { flex-direction: column; align-items: center; }
  .cs-cta-btn-primary,
  .cs-cta-btn-secondary { width: 100%; text-align: center; max-width: 320px; }
}