/* ============================================
   BNI 마포 나이스챕터 - 프리미엄 스타일시트
   Brand Colors: Orange RGB(255,122,0)
   Style: Apple + Deloitte + BNI Premium
   ============================================ */

/* ============================================
   1. CSS Variables & Reset
   ============================================ */
:root {
    /* Brand Colors */
    --primary-orange: rgb(255, 122, 0);
    --cta-orange: rgb(255, 140, 66);
    --light-orange: rgb(255, 229, 204);
    --dark-orange: rgb(230, 100, 0);
    
    /* Neutral Colors */
    --white: #ffffff;
    --off-white: #fafafa;
    --light-gray: #f5f5f7;
    --medium-gray: #86868b;
    --dark-gray: #1d1d1f;
    --text-dark: #1d1d1f;
    --text-medium: #424245;
    --text-light: #86868b;
    
    /* Shadows */
    --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-large: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-orange: 0 8px 24px rgba(255, 122, 0, 0.25);
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-max-width: 1200px;
    
    /* Typography */
    --font-primary: 'Noto Sans KR', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

/* ============================================
   2. Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: var(--font-weight-extrabold);
}

h2 {
    font-size: 2.8rem;
    font-weight: var(--font-weight-bold);
}

h3 {
    font-size: 1.8rem;
}

p {
    margin-bottom: 1rem;
}

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

/* ============================================
   3. Layout Components
   ============================================ */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 40px;
}

section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.section-title {
    font-size: 2.8rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-medium);
    line-height: 1.8;
}

.section-header.light .section-title,
.section-header.light .section-subtitle {
    color: var(--white);
}

/* ============================================
   4. Hero Section
   ============================================ */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--dark-orange) 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><circle cx="100" cy="100" r="300" fill="rgba(255,255,255,0.05)"/><circle cx="900" cy="600" r="400" fill="rgba(255,255,255,0.05)"/><circle cx="600" cy="300" r="250" fill="rgba(255,255,255,0.03)"/></svg>');
    background-size: cover;
    opacity: 0.6;
}

.hero-container {
    position: relative;
    z-index: 2;
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 30px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-extrabold);
    margin-bottom: 30px;
    line-height: 1.2;
}

.hero-title .highlight {
    display: block;
    font-size: 2.5rem;
    font-weight: var(--font-weight-semibold);
    margin-top: 10px;
    opacity: 0.95;
}

.hero-subtitle {
    font-size: 1.3rem;
    line-height: 1.8;
    margin-bottom: 50px;
    opacity: 0.95;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-trust {
    display: flex;
    gap: 40px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
}

.trust-item i {
    font-size: 1.3rem;
}

/* BNI Logo */
.bni-logo-container {
    margin-bottom: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.bni-logo {
    width: 100%;
    max-width: 400px;
    height: auto;
    display: block;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
}

/* ============================================
   5. Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-medium);
    border: none;
    text-align: center;
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.15rem;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-orange);
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 2px solid var(--white);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-glow {
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        box-shadow: 0 4px 16px rgba(255, 255, 255, 0.3);
    }
    to {
        box-shadow: 0 8px 32px rgba(255, 255, 255, 0.5);
    }
}

/* ============================================
   6. Card Components
   ============================================ */
.card-grid {
    display: grid;
    gap: 30px;
}

.card-grid.three-column {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card-grid.four-column {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.feature-card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-medium);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.card-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--light-orange) 0%, var(--primary-orange) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.card-icon i {
    font-size: 2rem;
    color: var(--white);
}

.card-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 15px;
    color: var(--text-dark);
}

.card-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-medium);
}

/* ============================================
   7. Video Section
   ============================================ */
.video-section {
    background: var(--white);
    padding: 100px 0;
}

.video-container {
    max-width: 1000px;
    margin: 50px auto 0;
}

.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 비율 */
    background: var(--text-dark);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-large);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--text-dark) 0%, var(--text-medium) 100%);
    color: var(--white);
    gap: 20px;
    padding: 40px;
}

.video-placeholder i {
    font-size: 5rem;
    color: var(--primary-orange);
    opacity: 0.9;
}

.video-placeholder p {
    font-size: 1.3rem;
    font-weight: var(--font-weight-semibold);
    margin: 0;
}

.video-notice {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    max-width: 500px;
}

/* ============================================
   8. Why BNI Korea Section
   ============================================ */
.why-bni-section {
    background: linear-gradient(135deg, #fff 0%, var(--light-orange) 100%);
    padding: 120px 0;
}

.stats-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 80px;
}

.stat-showcase-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-medium);
    border-top: 4px solid var(--primary-orange);
}

.stat-showcase-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-large);
}

.stat-showcase-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--dark-orange) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.stat-showcase-icon i {
    font-size: 2.5rem;
    color: var(--white);
}

.stat-showcase-number {
    font-size: 3rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--primary-orange);
    margin-bottom: 10px;
}

.stat-showcase-label {
    font-size: 1.2rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: 15px;
}

.stat-showcase-desc {
    font-size: 0.95rem;
    color: var(--text-medium);
    line-height: 1.6;
    margin: 0;
}

.why-join-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.why-join-card {
    background: var(--white);
    padding: 40px 35px;
    border-radius: 20px;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.why-join-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-orange) 0%, var(--dark-orange) 100%);
}

.why-join-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-orange);
}

.why-join-number {
    font-size: 3.5rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--light-orange);
    line-height: 1;
    margin-bottom: 20px;
}

.why-join-card h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: 15px;
}

.why-join-card p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-medium);
    margin: 0;
}

/* ============================================
   9. About BNI Section
   ============================================ */
.about-section {
    background: var(--light-gray);
}

/* ============================================
   10. Chapter Features Section
   ============================================ */
.chapter-section {
    background: var(--white);
}

.icon-card {
    text-align: center;
    padding: 30px 20px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-medium);
}

.icon-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.icon-box {
    width: 80px;
    height: 80px;
    background: var(--light-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.icon-box i {
    font-size: 2rem;
    color: var(--primary-orange);
}

.icon-card h3 {
    font-size: 1.3rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 10px;
    color: var(--text-dark);
}

.icon-card p {
    font-size: 0.95rem;
    color: var(--text-medium);
    line-height: 1.6;
}

.welcome-box {
    max-width: 600px;
    margin: 60px auto 0;
    padding: 30px;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--dark-orange) 100%);
    border-radius: 16px;
    text-align: center;
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.welcome-box i {
    font-size: 2rem;
}

.welcome-box p {
    font-size: 1.2rem;
    font-weight: var(--font-weight-semibold);
    margin: 0;
}

/* ============================================
   11. Benefits Section
   ============================================ */
.benefits-section {
    background: var(--light-gray);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.benefit-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-medium);
    border-left: 4px solid var(--primary-orange);
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-orange);
}

.benefit-icon {
    width: 60px;
    height: 60px;
    background: var(--light-orange);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.benefit-icon i {
    font-size: 1.8rem;
    color: var(--primary-orange);
}

.benefit-card h3 {
    font-size: 1.4rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 15px;
    color: var(--text-dark);
}

.benefit-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-medium);
    margin: 0;
}

/* ============================================
   12. Stats Section
   ============================================ */
.stats-section {
    background: linear-gradient(135deg, var(--dark-orange) 0%, var(--primary-orange) 100%);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 80px;
}

.stat-card {
    text-align: center;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: var(--font-weight-extrabold);
    margin-bottom: 10px;
    color: var(--white);
    text-align: center;
    display: block;
    width: 100%;
}

.stat-label {
    font-size: 1.2rem;
    font-weight: var(--font-weight-medium);
    opacity: 0.9;
}

.testimonials {
    margin-top: 60px;
}

.testimonials-title {
    text-align: center;
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 40px;
    color: var(--white);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 35px;
    border-radius: 16px;
    position: relative;
}

.testimonial-quote {
    position: absolute;
    top: 20px;
    right: 25px;
}

.testimonial-quote i {
    font-size: 2.5rem;
    color: var(--light-orange);
    opacity: 0.5;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-medium);
    margin-bottom: 20px;
}

.testimonial-author {
    font-size: 0.95rem;
    color: var(--text-dark);
    font-weight: var(--font-weight-semibold);
}

/* ============================================
   13. Members Section
   ============================================ */
.members-section {
    background: var(--off-white);
    padding: 100px 0;
}

.members-header-badge {
    display: inline-block;
    font-size: 1.3rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-orange);
    margin-bottom: 15px;
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.member-card {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-medium);
    border-top: 3px solid var(--light-orange);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.member-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
    border-top-color: var(--primary-orange);
}

.member-header {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.member-avatar {
    width: 70px;
    height: 70px;
    min-width: 70px;
    background: linear-gradient(135deg, var(--light-orange) 0%, var(--primary-orange) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.member-info {
    flex: 1;
}

.member-name {
    font-size: 1.4rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: 5px;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.member-title {
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    color: var(--text-medium);
}

.member-company {
    font-size: 1.05rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-orange);
    margin-bottom: 3px;
}

.member-category {
    font-size: 0.9rem;
    color: var(--text-medium);
    background: var(--light-orange);
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    margin-top: 5px;
}

.member-description {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-medium);
    margin: 0;
}

.member-contact {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 15px;
    border-top: 1px solid var(--light-gray);
}

.member-contact a {
    font-size: 0.9rem;
    color: var(--text-medium);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition-fast);
}

.member-contact a:hover {
    color: var(--primary-orange);
}

.member-contact a i {
    font-size: 0.9rem;
    color: var(--primary-orange);
    width: 16px;
}

/* ============================================
   14. Gallery Section
   ============================================ */
.gallery-section {
    background: var(--white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.gallery-item {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-medium);
    position: relative;
    background: var(--white);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

.gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
}

.gallery-caption {
    padding: 15px 20px;
    background: var(--white);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    text-align: center;
    border-top: 2px solid var(--light-orange);
}

.gallery-placeholder {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--light-orange) 0%, #fff 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 40px;
}

.gallery-placeholder i {
    font-size: 3rem;
    color: var(--primary-orange);
}

.gallery-placeholder p {
    font-size: 1.1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-orange);
    margin: 0;
}

/* ============================================
   15. Form Section
   ============================================ */
.form-section {
    background: var(--light-gray);
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 60px;
    border-radius: 24px;
    box-shadow: var(--shadow-large);
}

.form-header {
    text-align: center;
    margin-bottom: 50px;
}

.form-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: 15px;
}

.form-subtitle {
    font-size: 1.2rem;
    color: var(--text-medium);
    line-height: 1.7;
}

.visitor-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-group label {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group label i {
    color: var(--primary-orange);
    font-size: 1.1rem;
}

.required {
    color: var(--primary-orange);
}

.form-group input,
.form-group textarea {
    padding: 16px;
    border: 2px solid #e5e5e7;
    border-radius: 12px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-orange);
    box-shadow: 0 0 0 4px rgba(255, 122, 0, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-notice {
    background: var(--light-orange);
    padding: 20px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.form-notice i {
    font-size: 1.3rem;
    color: var(--primary-orange);
}

.form-notice p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
}

.btn-submit {
    width: 100%;
    margin-top: 10px;
    background: var(--cta-orange);
    color: var(--white);
    font-size: 1.2rem;
    padding: 20px;
}

.btn-submit:hover {
    background: var(--primary-orange);
    transform: translateY(-2px);
    box-shadow: var(--shadow-orange);
}

.success-message {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, var(--light-orange) 0%, #fff 100%);
    border-radius: 20px;
}

.success-message i {
    font-size: 4rem;
    color: var(--primary-orange);
    margin-bottom: 20px;
}

.success-message h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.success-message p {
    font-size: 1.2rem;
    color: var(--text-medium);
    margin: 0;
}

/* ============================================
   16. FAQ Section
   ============================================ */
.faq-section {
    background: var(--white);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-item {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-small);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 25px 30px;
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--light-gray);
}

.faq-question > i:first-child {
    font-size: 1.5rem;
    color: var(--primary-orange);
}

.faq-question h3 {
    flex: 1;
    font-size: 1.2rem;
    font-weight: var(--font-weight-semibold);
    margin: 0;
}

.faq-toggle {
    font-size: 1rem;
    color: var(--text-medium);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-toggle {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-medium);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 30px 25px 75px;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-medium);
    margin: 0;
}

/* ============================================
   17. Final CTA Section
   ============================================ */
.final-cta-section {
    background: linear-gradient(135deg, var(--text-dark) 0%, var(--text-medium) 100%);
    color: var(--white);
    text-align: center;
}

.final-cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.final-cta-title {
    font-size: 2.8rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 25px;
    line-height: 1.3;
}

.final-cta-subtitle {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.final-cta-content .btn {
    background: var(--cta-orange);
    color: var(--white);
}

.final-cta-content .btn:hover {
    background: var(--primary-orange);
}

/* ============================================
   18. Footer
   ============================================ */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    font-size: 1.5rem;
    color: var(--primary-orange);
    margin-bottom: 10px;
}

.footer-logo p {
    color: var(--text-light);
    margin: 0;
}

.footer-info p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    color: var(--text-light);
}

.footer-info i {
    color: var(--primary-orange);
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

/* ============================================
   19. Floating Buttons
   ============================================ */
.floating-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 1000;
}

.floating-btn {
    background: var(--cta-orange);
    color: var(--white);
    padding: 18px 28px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    box-shadow: var(--shadow-orange);
    transition: all var(--transition-medium);
    opacity: 0;
    transform: translateX(150px);
    white-space: nowrap;
}

.floating-btn.visible {
    opacity: 1;
    transform: translateX(0);
}

.floating-btn:hover {
    transform: translateX(-5px);
    box-shadow: 0 12px 40px rgba(255, 122, 0, 0.4);
}

.floating-btn i {
    font-size: 1.2rem;
}

/* 카카오톡 버튼 */
.kakao-btn {
    background: #FEE500;
    color: #3C1E1E;
    box-shadow: 0 4px 16px rgba(254, 229, 0, 0.4);
}

.kakao-btn:hover {
    background: #FDD835;
    box-shadow: 0 8px 24px rgba(254, 229, 0, 0.6);
}

/* 네이버 블로그 버튼 */
.blog-btn {
    background: #03C75A;
    color: var(--white);
    box-shadow: 0 4px 16px rgba(3, 199, 90, 0.4);
}

.blog-btn:hover {
    background: #02B350;
    box-shadow: 0 8px 24px rgba(3, 199, 90, 0.6);
}

/* 비지터 신청 버튼 */
.visitor-btn {
    background: var(--cta-orange);
}

.visitor-btn:hover {
    background: var(--primary-orange);
}

/* ============================================
   20. Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-title .highlight {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2.3rem;
    }
    
    .container {
        padding: 0 30px;
    }
    
    .bni-logo-container {
        margin-bottom: 35px;
    }
    
    .bni-logo {
        max-width: 350px;
    }
    
    .video-section {
        padding: 80px 0;
    }
    
    .why-bni-section {
        padding: 80px 0;
    }
    
    .stat-showcase-number {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-title .highlight {
        font-size: 1.6rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn-large {
        width: 100%;
        justify-content: center;
    }
    
    .hero-trust {
        gap: 20px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1.1rem;
    }
    
    .card-grid.three-column,
    .card-grid.four-column {
        grid-template-columns: 1fr;
    }
    
    .bni-logo-container {
        margin-bottom: 30px;
    }
    
    .bni-logo {
        max-width: 280px;
    }
    
    .video-section {
        padding: 60px 0;
    }
    
    .video-placeholder i {
        font-size: 4rem;
    }
    
    .video-placeholder p {
        font-size: 1.1rem;
    }
    
    .video-notice {
        font-size: 0.85rem;
    }
    
    .why-bni-section {
        padding: 60px 0;
    }
    
    .stats-showcase {
        grid-template-columns: 1fr;
        margin-bottom: 50px;
    }
    
    .why-join-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-showcase-number {
        font-size: 2.2rem;
    }
    
    .why-join-number {
        font-size: 2.5rem;
    }
    
    .members-section {
        padding: 60px 0;
    }
    
    .members-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .member-card {
        padding: 25px;
    }
    
    .member-avatar {
        width: 60px;
        height: 60px;
        min-width: 60px;
        font-size: 1.7rem;
    }
    
    .member-name {
        font-size: 1.2rem;
    }
    
    .form-container {
        padding: 40px 30px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .gallery-item img {
        height: 250px;
    }
    
    .gallery-caption {
        padding: 12px 15px;
        font-size: 0.95rem;
    }
    
    .final-cta-title {
        font-size: 2rem;
    }
    
    .floating-buttons {
        bottom: 20px;
        right: 20px;
        gap: 12px;
    }
    
    .floating-btn {
        width: 56px;
        height: 56px;
        border-radius: 50%;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 56px;
    }
    
    .floating-btn span {
        display: none;
    }
    
    .floating-btn i {
        font-size: 1.4rem;
        margin: 0;
    }
    
    .container {
        padding: 0 20px;
    }
    
    /* 터치 영역 최적화 */
    .btn, a, button {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }
    
    /* 가로 스크롤 방지 */
    body {
        overflow-x: hidden;
    }
    
    /* 모바일 입력 필드 확대 */
    input, textarea, select {
        font-size: 16px !important;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-title .highlight {
        font-size: 1.4rem;
    }
    
    .section-title {
        font-size: 1.7rem;
    }
    
    .form-container {
        padding: 30px 20px;
    }
    
    .feature-card,
    .benefit-card {
        padding: 30px 20px;
    }
}

/* ============================================
   21. Accessibility & Animations
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* Focus styles for accessibility */
button:focus,
a:focus,
input:focus,
textarea:focus {
    outline: 3px solid var(--primary-orange);
    outline-offset: 2px;
}

/* ============================================
   22. Mobile Performance Optimization
   ============================================ */
/* 터치 디바이스 최적화 */
@media (hover: none) and (pointer: coarse) {
    /* 터치 기기에서 호버 효과 제거 */
    .feature-card:hover,
    .icon-card:hover,
    .benefit-card:hover,
    .member-card:hover {
        transform: none;
    }
    
    /* 터치 피드백 */
    .btn:active,
    .floating-btn:active {
        transform: scale(0.95);
    }
    
    /* 터치 영역 확대 */
    .member-contact a {
        padding: 12px;
        margin: -8px;
    }
}

/* GPU 가속 활성화 */
.hero-section,
.floating-btn,
.feature-card,
.member-card {
    will-change: transform;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* Print styles */
@media print {
    .floating-btn,
    .hero-cta,
    .form-section {
        display: none;
    }
}