:root {
    --primary-color: #FF7043;
    --secondary-color: #4A90E2;
    --text-dark: #212121;
    --text-light: #666666;
    --bg-light: #F8F9FA;
    --border-color: #E0E0E0;
    --success-color: #4CAF50;
    --pr-color: #FF6B35; /* 홍보 강조색 */
}

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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 20px; /* 시니어 친화 큰 글씨 */
    line-height: 1.7;
    color: var(--text-dark);
    background: white;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* 헤더 */
header {
    background: white;
    border-bottom: 2px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.company-tag {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

nav a:hover,
nav a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* 히어로 섹션 */
.hero {
    background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
    padding: 5rem 2rem;
    text-align: center;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: var(--pr-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.hero-sub-cta {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.hero-sub-cta a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 1rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.2s;
}

.hero-sub-cta a:hover {
    background: rgba(255,255,255,0.8);
    color: var(--primary-color);
}

.hero-image {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    margin-top: 3rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

/* 버튼 */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    min-height: 60px;
    line-height: 1.5;
}

.btn-primary {
    background: var(--pr-color);
    color: white;
    box-shadow: 0 4px 16px rgba(255,107,53,0.3);
}

.btn-primary:hover {
    background: #E85A2B;
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255,107,53,0.4);
}

.btn-secondary {
    background: white;
    color: var(--pr-color);
    border: 2px solid var(--pr-color);
}

.btn-secondary:hover {
    background: var(--pr-color);
    color: white;
}

.btn-small {
    padding: 0.7rem 1.5rem;
    font-size: 1rem;
    min-height: 48px;
}

/* 섹션 타이틀 */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-title p {
    font-size: 1.2rem;
    color: var(--text-light);
}

/* 통계 카드 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    border: 2px solid var(--border-color);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.stat-detail {
    font-size: 1rem;
    color: var(--text-light);
}

/* 데이터 이미지 */
.data-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.data-img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

/* 기능 카드 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    border: 2px solid var(--border-color);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* 단계 카드 */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.step-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    border: 2px solid var(--border-color);
}

.step-badge {
    display: inline-block;
    background: var(--pr-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.step-card h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.step-card p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.step-img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    margin-top: 1rem;
}

/* 앱 미리보기 */
.app-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
}

.preview-img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

/* 스크롤 부드럽게 */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* 헤더 높이만큼 */
}

.press-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.press-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    border: 2px solid var(--border-color);
}

.press-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.press-card h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.press-card p {
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.news-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border-left: 4px solid var(--pr-color);
}

.news-date {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.news-item h3,
.news-item h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.news-item p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.mediakit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.mediakit-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 2px solid var(--border-color);
}

.mediakit-item h3,
.mediakit-item h4 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.mediakit-item p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
}

.video-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(255,107,53,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    cursor: pointer;
    transition: all 0.3s;
}

.play-button:hover {
    background: var(--pr-color);
    transform: translate(-50%, -50%) scale(1.1);
}

.video-card h3,
.video-card h4 {
    padding: 1.5rem;
    font-size: 1.4rem;
    font-weight: 700;
}

.video-card p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-light);
}

.video-card > div:last-child {
    padding: 0 1.5rem 1.5rem;
}

/* CTA 섹션 */
.cta-section {
    padding: 4rem 2rem;
}

/* 푸터 */
footer {
    background: #2C2C2C;
    color: white;
    padding: 3rem 2rem 2rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

footer h3, footer h4 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

footer p, footer li {
    margin-bottom: 0.6rem;
    color: rgba(255,255,255,0.8);
    font-size: 1rem;
}

footer ul {
    list-style: none;
}

footer a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
}

/* 반응형 */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.8rem;
    }
    
    nav ul {
        gap: 1.5rem;
    }
    
    nav a {
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 18px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
    }
    
    nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .stats-grid,
    .features-grid,
    .steps-grid,
    .data-images,
    .app-preview,
    .press-grid,
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
}