/* ══════════════════════════════════════════════════
   MoldEye 솔루션 소개 페이지 전용 CSS
   intro- 접두사로 site.css와 충돌 방지
   ══════════════════════════════════════════════════ */

/* ── 리셋 & 기본 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
    scroll-behavior: smooth;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', sans-serif;
    background: #0f172a;
    color: #e2e8f0;
}
body { overflow-x: hidden; }
a { text-decoration: none; color: inherit; }

/* ── 컨테이너 ── */
.intro-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ══════════════════════════════════════
   내비게이션 바
   ══════════════════════════════════════ */
.intro-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 16px 0;
    background: transparent;
    transition: background 0.3s, padding 0.3s, box-shadow 0.3s, backdrop-filter 0.3s;
}
.intro-nav.scrolled {
    background: rgba(15,23,42,0.92);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    padding: 10px 0;
    box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.intro-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 32px;
}
.intro-logo {
    display: flex; align-items: center; gap: 8px;
    font-size: 1.1rem; font-weight: 800;
    color: #f1f5f9;
}
.intro-logo i {
    font-size: 1.4rem;
    background: linear-gradient(135deg, #3b82f6, #06b6d4);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.intro-nav-links {
    display: flex; gap: 24px; flex: 1;
}
.intro-nav-links a {
    font-size: 0.85rem; font-weight: 500;
    color: #94a3b8;
    transition: color 0.2s;
    position: relative;
}
.intro-nav-links a:hover,
.intro-nav-links a.active {
    color: #e2e8f0;
}
.intro-nav-links a.active::after {
    content: '';
    position: absolute; bottom: -4px; left: 0; right: 0;
    height: 2px;
    background: #3b82f6;
    border-radius: 1px;
}
.intro-nav-actions {
    display: flex; gap: 8px; align-items: center;
}
.intro-btn-outline-sm {
    padding: 6px 16px; border-radius: 6px;
    font-size: 0.8rem; font-weight: 600;
    color: #94a3b8;
    border: 1px solid #334155;
    transition: all 0.2s;
}
.intro-btn-outline-sm:hover { color: #e2e8f0; border-color: #3b82f6; }
.intro-btn-primary-sm {
    padding: 6px 16px; border-radius: 6px;
    font-size: 0.8rem; font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transition: all 0.2s;
}
.intro-btn-primary-sm:hover { background: linear-gradient(135deg, #3b82f6, #2563eb); transform: translateY(-1px); }
.intro-hamburger {
    display: none;
    background: none; border: none; color: #e2e8f0;
    font-size: 1.5rem; cursor: pointer; padding: 4px;
}

/* ══════════════════════════════════════
   Hero 섹션
   ══════════════════════════════════════ */
.intro-hero {
    position: relative;
    min-height: 100vh;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    overflow: hidden;
    background: linear-gradient(160deg, #0f172a 0%, #162544 40%, #0f1f3a 100%);
    padding: 100px 24px 60px;
}

/* 배경 장식 */
.intro-bg-circle {
    position: absolute; border-radius: 50%;
    border: 1px solid rgba(59,130,246,0.08);
    pointer-events: none;
}
.intro-bg-circle.c1 {
    width: 700px; height: 700px; top: -200px; right: -200px;
    background: radial-gradient(circle, rgba(59,130,246,0.06), transparent 70%);
}
.intro-bg-circle.c2 {
    width: 500px; height: 500px; bottom: -150px; left: -150px;
    border-color: rgba(16,185,129,0.08);
    background: radial-gradient(circle, rgba(16,185,129,0.04), transparent 70%);
}
.intro-bg-circle.c3 {
    width: 300px; height: 300px; top: 30%; left: 50%;
    border-color: rgba(168,85,247,0.06);
    background: radial-gradient(circle, rgba(168,85,247,0.03), transparent 70%);
}
.intro-bg-glow {
    position: absolute; width: 600px; height: 600px; border-radius: 50%;
    background: radial-gradient(circle, rgba(59,130,246,0.1), transparent 70%);
    top: 5%; right: 10%; pointer-events: none;
}

.intro-hero-content {
    position: relative; z-index: 2;
    text-align: center;
    max-width: 800px; width: 100%;
}

/* Hero 뱃지 */
.intro-hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 20px; border-radius: 24px;
    font-size: 0.82rem; font-weight: 600;
    background: rgba(59,130,246,0.12);
    border: 1px solid rgba(59,130,246,0.25);
    color: #60a5fa;
    margin-bottom: 24px;
    animation: introFadeSlideDown 0.8s ease-out;
}

/* Hero 타이틀 */
.intro-hero-title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 900; line-height: 1.25;
    color: #f1f5f9; margin-bottom: 16px;
    animation: introFadeSlideDown 0.8s ease-out 0.15s both;
}
.intro-gradient-text {
    background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 50%, #10b981 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-size: 200% auto;
    animation: introGradientShift 4s ease-in-out infinite;
}

/* Hero 서브타이틀 */
.intro-hero-sub {
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: rgba(255,255,255,0.5);
    line-height: 1.7; margin-bottom: 32px;
    animation: introFadeSlideDown 0.8s ease-out 0.3s both;
}

/* 트래킹 시각화 */
.intro-tracking-visual {
    position: relative; width: 100%; max-width: 600px; height: 200px;
    margin: 0 auto 36px; border-radius: 16px;
    background: rgba(15,23,42,0.6);
    border: 1px solid rgba(59,130,246,0.15);
    overflow: hidden;
    animation: introFadeSlideDown 0.8s ease-out 0.45s both;
}
.intro-tracking-visual::before {
    content: ''; position: absolute; inset: 0; opacity: 0.04;
    background-image:
        linear-gradient(rgba(255,255,255,0.2) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.2) 1px, transparent 1px);
    background-size: 40px 40px;
}
.intro-geo-zone {
    position: absolute; border: 1.5px dashed; border-radius: 50%;
}
.intro-geo-zone.gz1 {
    width: 110px; height: 110px; top: 12%; left: 8%;
    border-color: rgba(16,185,129,0.3); background: rgba(16,185,129,0.04);
}
.intro-geo-zone.gz2 {
    width: 90px; height: 90px; top: 25%; right: 10%;
    border-color: rgba(59,130,246,0.3); background: rgba(59,130,246,0.04);
}
.intro-geo-zone.gz3 {
    width: 70px; height: 70px; bottom: 10%; left: 40%;
    border-color: rgba(168,85,247,0.2); background: rgba(168,85,247,0.03);
}
.intro-tk-marker {
    position: absolute; width: 14px; height: 14px; border-radius: 50%;
    box-shadow: 0 0 8px currentColor;
}
.intro-tk-marker::after {
    content: ''; position: absolute; inset: -6px; border-radius: 50%;
    border: 2px solid currentColor; opacity: 0;
    animation: introMarkerPing 2.5s ease-out infinite;
}
.intro-tk-marker.m1 { background: #10b981; color: #10b981; top: 28%; left: 15%; animation: introMarkerFloat 4s ease-in-out infinite; }
.intro-tk-marker.m2 { background: #3b82f6; color: #3b82f6; top: 48%; left: 55%; animation: introMarkerFloat 4s ease-in-out 0.5s infinite; }
.intro-tk-marker.m3 { background: #f59e0b; color: #f59e0b; top: 20%; left: 68%; animation: introMarkerFloat 4s ease-in-out 1s infinite; }
.intro-tk-marker.m4 { background: #ef4444; color: #ef4444; top: 65%; left: 35%; animation: introMarkerFloat 4s ease-in-out 1.5s infinite; }
.intro-tk-marker.m5 { background: #06b6d4; color: #06b6d4; top: 42%; left: 82%; animation: introMarkerFloat 4s ease-in-out 0.8s infinite; }
.intro-tk-route {
    position: absolute; height: 2px; transform-origin: left center; opacity: 0.5;
}
.intro-tk-route.r1 {
    top: 34%; left: 18%; width: 37%; transform: rotate(10deg);
    background: linear-gradient(90deg, #10b981, #f59e0b);
    animation: introRoutePulse 3s ease-in-out infinite;
}
.intro-tk-route.r2 {
    top: 52%; left: 58%; width: 24%; transform: rotate(-16deg);
    background: linear-gradient(90deg, #3b82f6, #06b6d4);
    animation: introRoutePulse 3s ease-in-out 1s infinite;
}
.intro-moving-mold {
    position: absolute; top: 33%; left: 15%;
    font-size: 18px; color: #f59e0b;
    animation: introMoldMove 6s ease-in-out infinite;
    filter: drop-shadow(0 0 6px rgba(245,158,11,0.5));
}
.intro-visual-label {
    position: absolute; bottom: 8px; right: 12px;
    font-size: 0.6rem; color: rgba(255,255,255,0.2);
    letter-spacing: 1px; text-transform: uppercase;
}

/* Hero CTA 버튼 */
.intro-hero-cta {
    display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
    animation: introFadeSlideDown 0.8s ease-out 0.6s both;
}
.intro-btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px; border-radius: 10px;
    font-size: 0.95rem; font-weight: 600; color: #fff;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transition: all 0.25s;
    border: none; cursor: pointer;
}
.intro-btn-primary:hover {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,0.35);
}
.intro-btn-outline {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px; border-radius: 10px;
    font-size: 0.95rem; font-weight: 600;
    color: #94a3b8;
    border: 1px solid #334155;
    transition: all 0.25s;
}
.intro-btn-outline:hover {
    color: #e2e8f0; border-color: #3b82f6;
    transform: translateY(-2px);
}
.intro-btn-lg { padding: 14px 36px; font-size: 1rem; }

/* 스크롤 표시기 */
.intro-scroll-indicator {
    position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    animation: introFadeSlideDown 0.8s ease-out 0.9s both;
}
.intro-scroll-indicator span {
    font-size: 0.7rem; color: rgba(255,255,255,0.25); letter-spacing: 0.5px;
}
.intro-scroll-mouse {
    width: 24px; height: 38px; border-radius: 12px;
    border: 2px solid rgba(255,255,255,0.2);
    position: relative;
}
.intro-scroll-dot {
    position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
    width: 4px; height: 8px; border-radius: 2px;
    background: rgba(255,255,255,0.4);
    animation: introScrollDot 2s ease-in-out infinite;
}

/* ══════════════════════════════════════
   공통 섹션 스타일
   ══════════════════════════════════════ */
.intro-section {
    padding: 100px 0;
    position: relative;
}
.intro-section-alt {
    background: linear-gradient(180deg, rgba(30,41,59,0.3) 0%, rgba(15,23,42,0) 100%);
}
.intro-section-header {
    text-align: center; margin-bottom: 64px;
}
.intro-section-badge {
    display: inline-block;
    padding: 4px 14px; border-radius: 16px;
    font-size: 0.68rem; font-weight: 700;
    letter-spacing: 2px;
    color: #3b82f6;
    background: rgba(59,130,246,0.08);
    border: 1px solid rgba(59,130,246,0.15);
    margin-bottom: 16px;
}
.intro-section-header h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800; color: #f1f5f9;
    margin-bottom: 12px;
}
.intro-section-header p {
    font-size: clamp(0.85rem, 1.2vw, 1rem);
    color: #64748b; max-width: 600px; margin: 0 auto;
}

/* ══════════════════════════════════════
   핵심 기능 카드 그리드
   ══════════════════════════════════════ */
.intro-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.intro-feature-card {
    background: rgba(30,41,59,0.5);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(51,65,85,0.5);
    border-radius: 16px;
    padding: 32px 28px;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.intro-feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.25);
    border-color: rgba(59,130,246,0.3);
}
.intro-feature-icon {
    width: 52px; height: 52px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem; margin-bottom: 20px;
}
.intro-feature-card h3 {
    font-size: 1.05rem; font-weight: 700; color: #f1f5f9;
    margin-bottom: 10px;
}
.intro-feature-card p {
    font-size: 0.85rem; color: #94a3b8; line-height: 1.7;
}

/* ══════════════════════════════════════
   왜 MoldEye인가? (장점)
   ══════════════════════════════════════ */
.intro-advantages-list {
    display: flex; flex-direction: column; gap: 32px;
    max-width: 900px; margin: 0 auto;
}
.intro-advantage-item {
    display: flex; align-items: center; gap: 28px;
    background: rgba(30,41,59,0.4);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(51,65,85,0.4);
    border-radius: 16px;
    padding: 32px;
    transition: transform 0.3s, border-color 0.3s;
}
.intro-advantage-item:hover {
    transform: translateX(8px);
    border-color: rgba(59,130,246,0.3);
}
.intro-advantage-item.reverse:hover {
    transform: translateX(-8px);
}
.intro-advantage-num {
    font-size: 2.4rem; font-weight: 900;
    background: linear-gradient(135deg, #3b82f6, #06b6d4);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    flex-shrink: 0; min-width: 60px; text-align: center;
}
.intro-advantage-content { flex: 1; }
.intro-advantage-content h3 {
    font-size: 1.1rem; font-weight: 700; color: #f1f5f9;
    margin-bottom: 8px;
}
.intro-advantage-content p {
    font-size: 0.88rem; color: #94a3b8; line-height: 1.7;
}
.intro-advantage-visual {
    flex-shrink: 0;
    width: 64px; height: 64px; border-radius: 16px;
    background: rgba(59,130,246,0.08);
    border: 1px solid rgba(59,130,246,0.15);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; color: #3b82f6;
}

/* ══════════════════════════════════════
   시스템 구성 (아키텍처)
   ══════════════════════════════════════ */
.intro-arch-diagram {
    display: flex; align-items: center; justify-content: center;
    gap: 0; margin-bottom: 48px; flex-wrap: wrap;
}
.intro-arch-layer {
    flex: 0 0 260px;
    background: rgba(30,41,59,0.5);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(51,65,85,0.5);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: transform 0.3s, border-color 0.3s;
}
.intro-arch-layer:hover {
    transform: translateY(-4px);
    border-color: rgba(59,130,246,0.3);
}
.intro-arch-layer-center {
    border-color: rgba(59,130,246,0.3);
    background: rgba(59,130,246,0.06);
}
.intro-arch-icon {
    width: 56px; height: 56px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; margin: 0 auto 16px;
}
.intro-arch-layer h4 {
    font-size: 0.95rem; font-weight: 700; color: #f1f5f9;
    margin-bottom: 4px;
}
.intro-arch-layer p {
    font-size: 0.78rem; color: #64748b; margin-bottom: 12px;
}
.intro-arch-tags {
    display: flex; flex-wrap: wrap; gap: 6px; justify-content: center;
}
.intro-arch-tags span {
    padding: 3px 10px; border-radius: 6px;
    font-size: 0.68rem; font-weight: 600;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    color: #94a3b8;
}
.intro-arch-connector {
    display: flex; align-items: center; gap: 0;
    padding: 0 12px;
}
.intro-arch-line {
    width: 40px; height: 2px;
    background: repeating-linear-gradient(90deg, #334155 0, #334155 6px, transparent 6px, transparent 12px);
    animation: introDashMove 1s linear infinite;
}
.intro-arch-arrow {
    color: #3b82f6; font-size: 1rem;
    animation: introArrowPulse 1.5s ease-in-out infinite;
}

/* 기술 스택 뱃지 */
.intro-tech-badges {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
}
.intro-tech-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px; border-radius: 8px;
    font-size: 0.78rem; font-weight: 600;
    background: rgba(30,41,59,0.6);
    border: 1px solid rgba(51,65,85,0.5);
    color: #94a3b8;
    transition: all 0.25s;
}
.intro-tech-badge:hover {
    border-color: rgba(59,130,246,0.3);
    color: #e2e8f0;
    transform: translateY(-2px);
}
.intro-tech-badge i { color: #3b82f6; }

/* ══════════════════════════════════════
   활용 분야
   ══════════════════════════════════════ */
.intro-usecases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.intro-usecase-card {
    background: rgba(30,41,59,0.5);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(51,65,85,0.5);
    border-radius: 16px;
    padding: 0;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}
.intro-usecase-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 32px rgba(0,0,0,0.2);
}
.intro-usecase-accent {
    height: 4px; width: 100%;
}
.intro-usecase-icon {
    width: 48px; height: 48px; border-radius: 12px;
    background: rgba(59,130,246,0.08);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem; color: #3b82f6;
    margin: 24px 24px 16px;
}
.intro-usecase-card h3 {
    font-size: 1rem; font-weight: 700; color: #f1f5f9;
    padding: 0 24px; margin-bottom: 8px;
}
.intro-usecase-card p {
    font-size: 0.82rem; color: #94a3b8; line-height: 1.7;
    padding: 0 24px 24px;
}

/* ══════════════════════════════════════
   통계 배너
   ══════════════════════════════════════ */
.intro-stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(59,130,246,0.06), rgba(6,182,212,0.04), rgba(16,185,129,0.03));
    border-top: 1px solid rgba(59,130,246,0.1);
    border-bottom: 1px solid rgba(59,130,246,0.1);
}
.intro-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}
.intro-stat-item { padding: 16px; }
.intro-stat-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    background: linear-gradient(135deg, #3b82f6, #06b6d4);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
    line-height: 1.2;
}
.intro-stat-static {
    background: linear-gradient(135deg, #10b981, #06b6d4);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.intro-stat-label {
    font-size: 0.85rem; color: #64748b; font-weight: 500;
}

/* ══════════════════════════════════════
   CTA 섹션
   ══════════════════════════════════════ */
.intro-cta-section {
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.intro-cta-section::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, rgba(59,130,246,0.08) 0%, transparent 70%);
    pointer-events: none;
}
.intro-cta-content {
    position: relative; z-index: 2;
}
.intro-cta-content h2 {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 800; color: #f1f5f9;
    margin-bottom: 16px;
}
.intro-cta-content p {
    font-size: clamp(0.88rem, 1.2vw, 1rem);
    color: #64748b; line-height: 1.8;
    margin-bottom: 36px;
}
.intro-cta-buttons {
    display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
}

/* ══════════════════════════════════════
   푸터
   ══════════════════════════════════════ */
.intro-footer {
    background: #0b1220;
    border-top: 1px solid rgba(51,65,85,0.4);
    padding: 48px 0 0;
}
.intro-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 32px;
}
.intro-footer-logo {
    display: flex; align-items: center; gap: 8px;
    font-size: 1.1rem; font-weight: 800; color: #f1f5f9;
    margin-bottom: 12px;
}
.intro-footer-logo i {
    font-size: 1.3rem; color: #3b82f6;
}
.intro-footer-brand p {
    font-size: 0.82rem; color: #64748b; line-height: 1.7;
}
.intro-footer-links h4,
.intro-footer-contact h4 {
    font-size: 0.85rem; font-weight: 700; color: #94a3b8;
    margin-bottom: 16px;
}
.intro-footer-links a {
    display: block; font-size: 0.82rem; color: #64748b;
    padding: 4px 0; transition: color 0.2s;
}
.intro-footer-links a:hover { color: #3b82f6; }
.intro-footer-contact p {
    font-size: 0.82rem; color: #64748b;
    display: flex; align-items: center; gap: 8px;
    margin-bottom: 8px;
}
.intro-footer-contact i { color: #3b82f6; font-size: 0.85rem; }
.intro-footer-bottom {
    border-top: 1px solid rgba(51,65,85,0.3);
    padding: 20px 0;
    text-align: center;
    font-size: 0.75rem; color: #475569;
}

/* ══════════════════════════════════════
   스크롤 트리거 애니메이션 클래스
   ══════════════════════════════════════ */
.reveal {
    opacity: 0; transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.active { opacity: 1; transform: translateY(0); }

.reveal-left {
    opacity: 0; transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-left.active { opacity: 1; transform: translateX(0); }

.reveal-right {
    opacity: 0; transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-right.active { opacity: 1; transform: translateX(0); }

/* ══════════════════════════════════════
   키프레임 애니메이션
   ══════════════════════════════════════ */
@keyframes introFadeSlideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes introGradientShift {
    0%, 100% { background-position: 0% center; }
    50%      { background-position: 100% center; }
}
@keyframes introMarkerPing {
    0%   { opacity: 0.6; transform: scale(0.8); }
    100% { opacity: 0;   transform: scale(2.5); }
}
@keyframes introMarkerFloat {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-4px); }
}
@keyframes introRoutePulse {
    0%, 100% { opacity: 0.3; }
    50%      { opacity: 0.7; }
}
@keyframes introMoldMove {
    0%   { left: 15%; top: 33%; }
    25%  { left: 35%; top: 28%; }
    50%  { left: 55%; top: 38%; }
    75%  { left: 70%; top: 30%; }
    100% { left: 15%; top: 33%; }
}
@keyframes introScrollDot {
    0%   { opacity: 1; top: 6px; }
    50%  { opacity: 0.3; top: 18px; }
    100% { opacity: 1; top: 6px; }
}
@keyframes introDashMove {
    from { background-position: 0 0; }
    to   { background-position: 12px 0; }
}
@keyframes introArrowPulse {
    0%, 100% { opacity: 0.5; transform: translateX(0); }
    50%      { opacity: 1;   transform: translateX(4px); }
}

/* ══════════════════════════════════════
   반응형: 태블릿 (768 ~ 1024px)
   ══════════════════════════════════════ */
@media (max-width: 1024px) {
    .intro-features-grid { grid-template-columns: repeat(2, 1fr); }
    .intro-usecases-grid { grid-template-columns: repeat(2, 1fr); }
    .intro-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .intro-arch-diagram { flex-direction: column; gap: 16px; }
    .intro-arch-layer { flex: none; width: 100%; max-width: 340px; }
    .intro-arch-connector {
        transform: rotate(90deg);
        padding: 8px 0;
    }
    .intro-footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .intro-advantage-visual { display: none; }
}

/* ══════════════════════════════════════
   반응형: 모바일 (<768px)
   ══════════════════════════════════════ */
@media (max-width: 767px) {
    .intro-nav-links {
        display: none;
        position: absolute; top: 100%; left: 0; right: 0;
        flex-direction: column; gap: 0;
        background: rgba(15,23,42,0.97);
        backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid #334155;
        padding: 8px 0;
    }
    .intro-nav-links.open { display: flex; }
    .intro-nav-links a {
        padding: 12px 24px;
        border-bottom: 1px solid rgba(51,65,85,0.3);
    }
    .intro-nav-actions { display: none; }
    .intro-hamburger { display: block; margin-left: auto; }

    .intro-hero { padding: 80px 16px 48px; min-height: auto; }
    .intro-hero-title { font-size: 1.8rem; }
    .intro-hero-sub { font-size: 0.85rem; }
    .intro-tracking-visual { height: 140px; margin-bottom: 24px; }
    .intro-scroll-indicator { display: none; }

    .intro-section { padding: 64px 0; }
    .intro-section-header { margin-bottom: 40px; }

    .intro-features-grid { grid-template-columns: 1fr; gap: 16px; }
    .intro-feature-card { padding: 24px 20px; }

    .intro-advantage-item {
        flex-direction: column; gap: 16px;
        padding: 24px 20px; text-align: center;
    }
    .intro-advantage-num { font-size: 2rem; }
    .intro-advantage-visual { display: none; }

    .intro-usecases-grid { grid-template-columns: 1fr; }
    .intro-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .intro-stats-section { padding: 48px 0; }
    .intro-stat-number { font-size: 2rem; }

    .intro-hero-cta { flex-direction: column; align-items: center; }
    .intro-btn-primary, .intro-btn-outline { width: 100%; max-width: 280px; justify-content: center; }

    .intro-cta-section { padding: 64px 0; }
    .intro-cta-buttons { flex-direction: column; align-items: center; }

    .intro-footer-grid { grid-template-columns: 1fr; gap: 24px; text-align: center; }
    .intro-footer-contact p { justify-content: center; }
}

/* ══════════════════════════════════════
   반응형: 대형 화면 (1600px+)
   ══════════════════════════════════════ */
@media (min-width: 1600px) {
    .intro-container { max-width: 1400px; }
    .intro-tracking-visual { max-width: 700px; height: 240px; }
    .intro-features-grid { gap: 32px; }
}