/* ========================================
   이지세이프(EASY SAFE) 랜딩페이지
   Design System & Styles
   ======================================== */

/* ── Google Fonts ── */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable.min.css');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ── CSS Variables ── */
:root {
  /* Colors - Safety & Health Standards */
  --c-primary: #00A86B;
  --c-primary-dark: #008F5B;
  --c-primary-light: #E6F9F1;
  --c-secondary: #2563EB;
  --c-secondary-dark: #1D4ED8;
  --c-secondary-light: #EEF2FF;
  --c-accent: #F59E0B;
  --c-accent-dark: #D97706;
  --c-accent-light: #FFFBEB;
  --c-success: #10B981;
  --c-danger: #EF4444;
  --c-bg: #F8FAFC;
  --c-bg-alt: #F1F5F9;
  --c-dark: #1E293B;
  --c-dark-soft: #334155;
  --c-text: #1E293B;
  --c-text-secondary: #64748B;
  --c-text-light: #94A3B8;
  --c-white: #FFFFFF;
  --c-border: #E2E8F0;

  /* Gradients */
  --grad-hero: linear-gradient(135deg, #0F172A 0%, #1E3A5F 50%, #0F172A 100%);
  --grad-primary: linear-gradient(135deg, #00A86B, #2563EB);
  --grad-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.6));

  /* Typography */
  --ff-primary: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --ff-english: 'Inter', sans-serif;
  --fs-hero: clamp(2.2rem, 5vw, 3.5rem);
  --fs-h1: clamp(1.8rem, 4vw, 2.8rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.2rem);
  --fs-h3: clamp(1.2rem, 2.5vw, 1.5rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  /* Spacing */
  --sp-xs: 0.5rem;
  --sp-sm: 1rem;
  --sp-md: 1.5rem;
  --sp-lg: 2rem;
  --sp-xl: 3rem;
  --sp-2xl: 4rem;
  --sp-3xl: 6rem;
  --sp-section: clamp(4rem, 10vw, 7rem);

  /* Border Radius */
  --br-sm: 8px;
  --br-md: 12px;
  --br-lg: 16px;
  --br-xl: 24px;
  --br-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 40px rgba(0, 168, 107, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --tr-fast: 0.2s ease;
  --tr-normal: 0.3s ease;
  --tr-slow: 0.5s ease;
  --tr-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset & Base ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--ff-primary);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--tr-fast);
}

ul,
ol {
  list-style: none;
}

/* ── Container ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-md);
}

/* ── Section Base ── */
.section {
  padding: var(--sp-section) 0;
  position: relative;
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--c-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-sm);
  padding: 0.4rem 1rem;
  background: var(--c-primary-light);
  border-radius: var(--br-full);
}

.section__title {
  font-size: var(--fs-h1);
  font-weight: var(--fw-bold);
  color: var(--c-dark);
  margin-bottom: var(--sp-sm);
  line-height: 1.3;
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--c-text-secondary);
  max-width: 680px;
  line-height: 1.7;
}

.section__header {
  text-align: center;
  margin-bottom: var(--sp-2xl);
}

.section__header .section__subtitle {
  margin: 0 auto;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  transition: all var(--tr-normal);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav__logo-img {
  height: 48px;
  width: auto;
  display: block;
  object-fit: contain;
}

@media (max-width: 768px) {
  .nav__logo-img {
    height: 36px;
  }
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-lg);
}

.nav__link {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--c-text-secondary);
  transition: color var(--tr-fast);
  position: relative;
}

.nav__link:hover {
  color: var(--c-primary);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--c-primary);
  transition: width var(--tr-normal);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  background: var(--c-primary);
  color: var(--c-white);
  border-radius: var(--br-full);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  transition: all var(--tr-normal);
}

.nav__cta:hover {
  background: var(--c-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 168, 107, 0.3);
}

.nav__login-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--c-primary);
  color: var(--c-primary);
  border-radius: var(--br-full);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  transition: all var(--tr-normal);
  white-space: nowrap;
}

.nav__login-btn:hover {
  background: var(--c-accent);
  color: var(--c-white);
  border-color: var(--c-accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 168, 107, 0.2);
}

.nav__mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 32px;
  position: relative;
}

.nav__mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-dark);
  position: absolute;
  left: 5px;
  transition: all var(--tr-fast);
}

.nav__mobile-toggle span:nth-child(1) {
  top: 9px;
}

.nav__mobile-toggle span:nth-child(2) {
  top: 15px;
}

.nav__mobile-toggle span:nth-child(3) {
  top: 21px;
}

.nav__mobile-toggle.active span:nth-child(1) {
  top: 15px;
  transform: rotate(45deg);
}

.nav__mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__mobile-toggle.active span:nth-child(3) {
  top: 15px;
  transform: rotate(-45deg);
}

/* ── Hero Section ── */
.hero {
  background: var(--grad-hero);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 168, 107, 0.15) 0%, transparent 70%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
  animation: heroGlow 10s ease-in-out infinite alternate-reverse;
}

@keyframes heroGlow {
  0% {
    transform: translate(0, 0) scale(1);
  }

  100% {
    transform: translate(40px, -30px) scale(1.1);
  }
}

/* Grid pattern overlay */
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(0, 168, 107, 0.15);
  border: 1px solid rgba(0, 168, 107, 0.3);
  border-radius: var(--br-full);
  color: #6EE7B7;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  margin-bottom: var(--sp-lg);
  animation: fadeInUp 0.6s ease;
}

.hero__title {
  font-size: var(--fs-hero);
  font-weight: var(--fw-extrabold);
  color: var(--c-white);
  line-height: 1.2;
  margin-bottom: var(--sp-md);
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero__title .highlight {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: #94A3B8;
  line-height: 1.8;
  margin-bottom: var(--sp-xl);
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero__subtitle strong {
  color: #CBD5E1;
}

.hero__actions {
  display: flex;
  gap: var(--sp-sm);
  flex-wrap: wrap;
  margin-bottom: var(--sp-2xl);
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero__stats {
  display: flex;
  gap: var(--sp-xl);
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero__stat {
  text-align: left;
}

.hero__stat-value {
  font-size: 1.8rem;
  font-weight: var(--fw-extrabold);
  color: var(--c-white);
  font-family: var(--ff-english);
}

.hero__stat-value span {
  color: var(--c-primary);
}

.hero__stat-label {
  font-size: var(--fs-small);
  color: var(--c-text-light);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border-radius: var(--br-full);
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  font-family: var(--ff-primary);
  cursor: pointer;
  border: none;
  transition: all var(--tr-normal);
  white-space: nowrap;
}

.btn--primary {
  background: var(--c-primary);
  color: var(--c-white);
  box-shadow: 0 4px 16px rgba(0, 168, 107, 0.3);
}

.btn--primary:hover {
  background: var(--c-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 168, 107, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--c-white);
  border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.btn--secondary {
  background: var(--c-secondary);
  color: var(--c-white);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.btn--secondary:hover {
  background: var(--c-secondary-dark);
  transform: translateY(-2px);
}

.btn--large {
  padding: 1.1rem 2.5rem;
  font-size: 1.05rem;
}

/* ── Pain Points Section ── */
.pain {
  background: var(--c-white);
}

.pain__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--sp-md);
}

.pain__card {
  padding: var(--sp-lg);
  border-radius: var(--br-lg);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  transition: all var(--tr-normal);
  position: relative;
  overflow: hidden;
}

.pain__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-accent);
}

.pain__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--c-accent);
  transform: scaleX(0);
  transition: transform var(--tr-normal);
}

.pain__card:hover::before {
  transform: scaleX(1);
}

.pain__icon {
  font-size: 2rem;
  margin-bottom: var(--sp-sm);
}

.pain__card-title {
  font-size: 1.05rem;
  font-weight: var(--fw-semibold);
  color: var(--c-dark);
  margin-bottom: var(--sp-xs);
  line-height: 1.5;
}

.pain__card-desc {
  font-size: var(--fs-small);
  color: var(--c-text-secondary);
  line-height: 1.6;
}

/* ── Features Section ── */
.features {
  background: var(--c-bg);
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border), transparent);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-md);
}

.feature-card {
  padding: var(--sp-lg);
  border-radius: var(--br-lg);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  text-align: center;
  transition: all var(--tr-normal);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--c-primary);
}

.feature-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--sp-sm);
  border-radius: var(--br-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  background: var(--c-primary-light);
  transition: all var(--tr-normal);
}

.feature-card:hover .feature-card__icon {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow);
}

.feature-card__title {
  font-size: 1.05rem;
  font-weight: var(--fw-bold);
  color: var(--c-dark);
  margin-bottom: var(--sp-xs);
}

.feature-card__desc {
  font-size: var(--fs-small);
  color: var(--c-text-secondary);
  line-height: 1.6;
}

/* ── Compliance Section ── */
.compliance {
  background: var(--c-white);
}

.compliance__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-lg);
}

.compliance__card {
  padding: var(--sp-lg) var(--sp-md);
  border-radius: var(--br-lg);
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  transition: all var(--tr-normal);
}

.compliance__card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.compliance__card-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: var(--sp-md);
  padding-bottom: var(--sp-sm);
  border-bottom: 2px solid var(--c-primary);
}

.compliance__card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--br-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.compliance__card:nth-child(1) .compliance__card-icon {
  background: var(--c-primary-light);
}

.compliance__card:nth-child(2) .compliance__card-icon {
  background: #FEE2E2;
}

.compliance__card:nth-child(3) .compliance__card-icon {
  background: var(--c-secondary-light);
}

.compliance__card-name {
  font-size: 1.1rem;
  font-weight: var(--fw-bold);
  color: var(--c-dark);
}

.compliance__items {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.compliance__item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: var(--fs-small);
  color: var(--c-text-secondary);
  line-height: 1.5;
}

.compliance__check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--c-primary-light);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.7rem;
  margin-top: 2px;
  transition: all var(--tr-normal);
}

.compliance__item.checked .compliance__check {
  background: var(--c-primary);
  color: var(--c-white);
}

.compliance__auto-update {
  margin-top: var(--sp-2xl);
  text-align: center;
  padding: var(--sp-md) var(--sp-lg);
  background: var(--c-primary-light);
  border-radius: var(--br-lg);
  border: 1px solid rgba(0, 168, 107, 0.2);
}

.compliance__auto-update p {
  font-size: 1.05rem;
  font-weight: var(--fw-semibold);
  color: var(--c-primary-dark);
}

/* ── Case Study Section ── */
.case-study {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A5F 50%, #0F172A 100%);
  color: var(--c-white);
}

.case-study.section {
  background-image: url('./resource/sf_img.png');

  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  background-color: rgba(0, 0, 0, 0.05); 
  padding: 100px 0;
  position: relative;
}

.case-study .section__label {
  background: rgba(0, 168, 107, 0.15);
  color: #6EE7B7;
}

.case-study .section__title {
  color: var(--c-white);
}

.case-study .section__subtitle {
  color: #FFFFFF;
}

.case-study__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-2xl);
  align-items: center;
}

.case-study__info h3 {
  font-size: var(--fs-h2);
  margin-bottom: var(--sp-md);
  color: var(--c-white);
}

.case-study__locations {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
  margin-bottom: var(--sp-lg);
}

.case-study__location-tag {
  padding: 0.3rem 0.8rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--br-full);
  font-size: 0.8rem;
  color: #CBD5E1;
}

.case-study__key-points {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}

.case-study__point {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: var(--sp-sm);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--br-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.case-study__point-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0, 168, 107, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
}

.case-study__point-text {
  font-size: var(--fs-small);
  color: #FFFFFF;
  line-height: 1.6;
}

.case-study__point-text strong {
  color: var(--c-white);
}

.case-study__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-md);
}

.case-study__stat-card {
  padding: var(--sp-lg);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--br-lg);
  text-align: center;
  transition: all var(--tr-normal);
}

.case-study__stat-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 168, 107, 0.3);
  transform: translateY(-4px);
}

.case-study__stat-number {
  font-size: 2.5rem;
  font-weight: var(--fw-extrabold);
  font-family: var(--ff-english);
  color: var(--c-primary);
  margin-bottom: 0.3rem;
}

.case-study__stat-desc {
  font-size: var(--fs-small);
  color: #FFFFFF;
}

/* ── Target Audience Section ── */
.target {
  background: var(--c-bg);
}

.target__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
}

.target__card {
  padding: var(--sp-lg);
  border-radius: var(--br-lg);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  text-align: center;
  transition: all var(--tr-normal);
}

.target__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-secondary);
}

.target__card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--sp-sm);
}

.target__card-title {
  font-size: 1.05rem;
  font-weight: var(--fw-bold);
  color: var(--c-dark);
  margin-bottom: var(--sp-xs);
}

.target__card-desc {
  font-size: var(--fs-small);
  color: var(--c-text-secondary);
  line-height: 1.6;
}

/* ── Steps Section ── */
.steps {
  background: var(--c-white);
}

.steps__timeline {
  display: flex;
  justify-content: space-between;
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.steps__timeline::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 10%;
  right: 10%;
  height: 3px;
  background: var(--c-border);
}

.steps__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 18%;
  position: relative;
  z-index: 1;
}

.steps__number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--c-primary-light);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: var(--fw-extrabold);
  margin-bottom: var(--sp-sm);
  transition: all var(--tr-normal);
  border: 3px solid var(--c-white);
  box-shadow: var(--shadow-md);
}

.steps__step:hover .steps__number {
  background: var(--c-primary);
  color: var(--c-white);
  transform: scale(1.1);
}

.steps__label {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--c-dark);
  margin-bottom: 0.3rem;
}

.steps__desc {
  font-size: 0.8rem;
  color: var(--c-text-secondary);
}

/* ── FAQ Section ── */
.faq {
  background: var(--c-bg);
}

.faq__list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}

.faq__item {
  border-radius: var(--br-md);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  overflow: hidden;
  transition: all var(--tr-normal);
}

.faq__item:hover {
  border-color: var(--c-primary);
}

.faq__question {
  width: 100%;
  padding: var(--sp-md) var(--sp-lg);
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-sm);
  font-family: var(--ff-primary);
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  color: var(--c-dark);
  text-align: left;
}

.faq__question-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-primary-light);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
  transition: transform var(--tr-normal);
}

.faq__item.active .faq__question-icon {
  transform: rotate(45deg);
  background: var(--c-primary);
  color: var(--c-white);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--tr-slow);
}

.faq__answer-inner {
  padding: 0 var(--sp-lg) var(--sp-md);
  font-size: var(--fs-small);
  color: var(--c-text-secondary);
  line-height: 1.8;
}

.faq__item.active .faq__answer {
  max-height: 300px;
}

/* ── Final CTA Section ── */
.final-cta {
  background: var(--grad-hero);
  text-align: center;
  padding: var(--sp-3xl) 0;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(0, 168, 107, 0.1) 0%, transparent 60%);
}

.final-cta__content {
  position: relative;
  z-index: 2;
}

.final-cta__title {
  font-size: var(--fs-h1);
  font-weight: var(--fw-extrabold);
  color: var(--c-white);
  margin-bottom: var(--sp-sm);
}

.final-cta__subtitle {
  font-size: 1.1rem;
  color: #94A3B8;
  margin-bottom: var(--sp-xl);
}

.final-cta__actions {
  display: flex;
  justify-content: center;
  gap: var(--sp-sm);
  flex-wrap: wrap;
  margin-bottom: var(--sp-lg);
}

.final-cta__contact {
  display: flex;
  justify-content: center;
  gap: var(--sp-xl);
  color: #94A3B8;
  font-size: var(--fs-small);
}

.final-cta__contact a {
  color: #CBD5E1;
  transition: color var(--tr-fast);
}

.final-cta__contact a:hover {
  color: var(--c-primary);
}

/* ── Download Section ── */
.download__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.download__card {
  background: var(--c-white);
  padding: 2.5rem;
  border-radius: var(--br-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  border: 1px solid var(--c-border);
  transition: transform var(--tr-normal), box-shadow var(--tr-normal);
}

.download__card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.download__platform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  margin-bottom: 2rem;
}

.download__icon {
  width: 32px;
  height: 32px;
}

.download__platform h3 {
  font-size: 1.5rem;
  font-weight: var(--fw-bold);
  color: var(--c-dark);
}

.download__qr {
  background: var(--c-bg);
  padding: 1.5rem;
  border-radius: var(--br-md);
  margin-bottom: 2rem;
  display: inline-block;
}

.download__qr img {
  width: 150px;
  height: 150px;
  margin-bottom: 0.8rem;
  border-radius: 4px;
  transition: transform var(--tr-normal), opacity var(--tr-normal);
}

.download__qr a:hover img {
  transform: scale(1.05);
  opacity: 0.8;
}

.download__qr p {
  font-size: 0.9rem;
  color: #64748B;
  font-weight: var(--fw-medium);
}

@media (max-width: 768px) {
  .download__grid {
    grid-template-columns: 1fr;
  }

  .download__card {
    padding: 2rem;
  }
}

/* ── Footer ── */
.footer {
  background: #0B1120;
  color: #64748B;
  padding: var(--sp-xl) 0;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: var(--fw-bold);
  font-size: 1.1rem;
}

.footer__logo-img {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
  /* 어두운 푸터 배경에 맞춰 로고를 흰색으로 반전 (필요시) */
  opacity: 0.8;
}

.footer__company {
  font-size: 0.9rem;
  color: #64748B;
}

.footer__links {
  display: flex;
  gap: var(--sp-md);
  font-size: var(--fs-small);
}

.footer__link {
  color: #64748B;
  transition: color var(--tr-fast);
}

.footer__link:hover {
  color: var(--c-primary);
}

/* ── Animations ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

.reveal-delay-4 {
  transition-delay: 0.4s;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .compliance__grid {
    grid-template-columns: 1fr;
  }

  .case-study__content {
    grid-template-columns: 1fr;
    gap: var(--sp-xl);
  }

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

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--c-white);
    padding: var(--sp-md);
    box-shadow: var(--shadow-lg);
    gap: var(--sp-sm);
  }

  .nav__links.active {
    display: flex;
  }

  .nav__mobile-toggle {
    display: block;
  }

  .hero__content {
    text-align: center;
    max-width: 100%;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__stats {
    justify-content: center;
    gap: var(--sp-lg);
  }

  .features__grid {
    grid-template-columns: 1fr;
  }

  .pain__grid {
    grid-template-columns: 1fr;
  }

  .case-study__stats {
    grid-template-columns: 1fr;
  }

  .target__grid {
    grid-template-columns: 1fr;
  }

  .steps__timeline {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-lg);
  }

  .steps__timeline::before {
    top: 0;
    bottom: 0;
    left: 32px;
    right: auto;
    width: 3px;
    height: auto;
  }

  .steps__step {
    flex-direction: row;
    text-align: left;
    width: 100%;
    gap: var(--sp-sm);
  }

  .steps__number {
    width: 48px;
    height: 48px;
    font-size: 1.1rem;
    flex-shrink: 0;
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--sp-sm);
    text-align: center;
  }

  .final-cta__contact {
    flex-direction: column;
    gap: var(--sp-sm);
  }
}

@media (max-width: 480px) {
  .hero__stat-value {
    font-size: 1.4rem;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__actions {
    flex-direction: column;
  }

  .final-cta__actions {
    flex-direction: column;
    align-items: center;
  }
}

/* ── Scroll Top Button ── */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  background-color: var(--c-primary);
  /* 녹색 버튼 배경 */
  border: 2px solid var(--c-white);
  border-radius: 50%;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--tr-normal);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0;
}

.scroll-top-logo {
  width: 70%;
  height: 70%;
  object-fit: contain;
  transform: scaleX(-1);
  /* 좌우 반전만 적용 */
  filter: grayscale(1) contrast(200);
  /* 오렌지색은 흰색으로, 아이콘은 검정색으로 극대화 */
  mix-blend-mode: multiply;
  /* 흰색을 투명하게 처리하여 녹색 배경이 보이게 함 */
  pointer-events: none;
  transition: transform var(--tr-normal);
}

.scroll-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background-color: var(--c-primary-dark);
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 168, 107, 0.4);
}

@media (max-width: 768px) {
  .scroll-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
}