/* ====================================
   AI 교육 - 최적화된 랜딩페이지 CSS
   
   디자인 철학:
   1. 가독성 최우선 - 충분한 대비와 여백
   2. 전문성 - 절제된 컬러와 명확한 계층
   3. 신뢰성 - 안정적인 레이아웃
   
   최적화된 컬러 팔레트:
   - Primary: #2563EB (신뢰감 있는 블루)
   - Secondary: #1E293B (딥 슬레이트)
   - Accent: #F59E0B (따뜻한 앰버)
   - Success: #10B981 (신선한 그린)
   - Background: #F8FAFC (부드러운 그레이)
   - Text: #0F172A (진한 슬레이트) / #FFFFFF (화이트)
   ==================================== */

/* ========== Reset & Base ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Optimized Colors for Readability */
    --color-primary: #2563EB;        /* 신뢰감 있는 블루 */
    --color-primary-light: #3B82F6;  /* 밝은 블루 */
    --color-primary-dark: #1E40AF;   /* 어두운 블루 */
    --color-secondary: #1E293B;      /* 딥 슬레이트 */
    --color-secondary-light: #334155; /* 중간 슬레이트 */
    --color-accent: #F59E0B;         /* 따뜻한 앰버 */
    --color-accent-light: #FBBF24;   /* 밝은 앰버 */
    --color-success: #10B981;        /* 신선한 그린 */
    --color-bg-primary: #FFFFFF;     /* 순수 화이트 */
    --color-bg-secondary: #F8FAFC;   /* 부드러운 그레이 */
    --color-bg-tertiary: #F1F5F9;    /* 중간 그레이 */
    --color-text-primary: #0F172A;   /* 진한 슬레이트 */
    --color-text-secondary: #475569; /* 중간 슬레이트 */
    --color-text-tertiary: #64748B;  /* 밝은 슬레이트 */
    --color-border: #E2E8F0;         /* 연한 보더 */
    
    /* Typography */
    --font-primary: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Spacing - 8px 기반 시스템 */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --space-12: 96px;
    --space-16: 128px;
    
    --section-padding: 100px 20px;
    --container-max-width: 1200px;
    
    /* Shadows - 부드럽고 자연스러운 그림자 */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
    background: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* 모바일 최적화 */
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-touch-callout: none;
    -webkit-text-size-adjust: 100%;
}

/* ========== Image Optimization ========== */
img {
    max-width: 100%;
    height: auto;
    /* 이미지 로딩 최적화 */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    display: block;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* WebP Support Detection */
.webp img {
    image-rendering: auto;
}

/* Image Compression Hints */
img {
    content-visibility: auto;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-3);
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
    letter-spacing: -0.025em;
}

h1 { font-size: 3.5rem; font-weight: 800; }
h2 { font-size: 2.75rem; font-weight: 800; }
h3 { font-size: 1.875rem; font-weight: 700; }
h4 { font-size: 1.5rem; font-weight: 600; }

p {
    margin-bottom: var(--space-2);
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: 1.0625rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-base);
    font-family: var(--font-primary);
    white-space: nowrap;
    line-height: 1;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: #D97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-bg-primary);
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: 1.125rem;
}

/* ========== Section Headers ========== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-8);
    position: relative;
    display: block;
}

.section-header::before {
    content: '';
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    border-radius: var(--radius-full);
}

.section-header-content {
    max-width: 800px;
    margin: 0 auto;
}

.section-header-image {
    display: none;
}

.section-illustration {
    display: none;
}

.section-label {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    background: rgba(37, 99, 235, 0.08);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-3);
    text-transform: uppercase;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    line-height: 1.15;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.65;
}

/* ========== Hero Section ========== */
.hero-section {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #0F172A 100%);
    color: var(--color-bg-primary);
    padding: var(--space-16) var(--space-3);
    position: relative;
    overflow: hidden;
    min-height: 85vh;
    display: flex;
    align-items: center;
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
    pointer-events: none;
    overflow: hidden;
}

.hero-bg-pattern::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -5%;
    width: 400px;
    height: 400px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'%3E%3Cpath fill='%233B82F6' fill-opacity='0.08' d='M100 0L130 70L200 70L145 110L170 180L100 140L30 180L55 110L0 70L70 70Z'/%3E%3C/svg%3E") no-repeat center;
    background-size: contain;
    animation: float 6s ease-in-out infinite;
    opacity: 0.3;
}

.hero-bg-pattern::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -5%;
    width: 350px;
    height: 350px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'%3E%3Ccircle cx='100' cy='100' r='80' fill='%23F59E0B' fill-opacity='0.08'/%3E%3Ccircle cx='100' cy='100' r='60' fill='none' stroke='%23F59E0B' stroke-opacity='0.1' stroke-width='2'/%3E%3Ccircle cx='100' cy='100' r='40' fill='none' stroke='%23F59E0B' stroke-opacity='0.1' stroke-width='2'/%3E%3C/svg%3E") no-repeat center;
    background-size: contain;
    animation: float 8s ease-in-out infinite reverse;
    opacity: 0.3;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

/* Hero Visual Icons */
.hero-visual-icons {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    margin: var(--space-6) 0;
    flex-wrap: wrap;
}

.floating-icon {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: floatIcon 3s ease-in-out infinite;
    transition: all var(--transition-base);
}

.floating-icon:hover {
    transform: scale(1.1) translateY(-5px);
    background: rgba(37, 99, 235, 0.3);
    border-color: var(--color-primary-light);
}

.floating-icon i {
    font-size: 1.75rem;
    color: var(--color-bg-primary);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.floating-icon .icon-emoji {
    font-size: 2rem;
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.3));
    line-height: 1;
    display: block;
}

.floating-icon svg {
    color: var(--color-bg-primary);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    width: 32px;
    height: 32px;
    stroke: currentColor;
    transition: all 0.3s ease;
}

.floating-icon:hover svg {
    transform: scale(1.1);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.4));
}

@keyframes floatIcon {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    animation: fadeInDown 0.8s ease-out;
}

.logo-container {
    background: var(--color-bg-primary);
    padding: var(--space-4);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px rgba(255, 255, 255, 0.2);
    border: 3px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.logo-container:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.3);
}

.logo-container img {
    display: block;
    width: 140px;
    height: 140px;
    object-fit: contain;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    background: var(--color-accent);
    color: var(--color-text-primary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.9375rem;
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-lg);
}

.hero-title {
    font-size: 3.75rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.hero-main-title {
    color: var(--color-accent-light);
    text-shadow: 0 0 40px rgba(251, 191, 36, 0.5);
    display: inline-block;
}

.hero-title .highlight {
    color: var(--color-primary-light);
    display: block;
    margin-top: var(--space-2);
}

.hero-subtitle {
    font-size: 1.375rem;
    line-height: 1.6;
    margin-bottom: var(--space-6);
    opacity: 0.95;
    color: #E2E8F0;
}

.hero-subtitle strong {
    color: var(--color-accent-light);
    font-weight: 700;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: var(--space-5);
    flex-wrap: wrap;
    margin-bottom: var(--space-8);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.0625rem;
    font-weight: 500;
}

.feature-item i {
    color: var(--color-success);
    font-size: 1.25rem;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* ========== Reference Section (레퍼런스를 Hero 다음으로) ========== */
.references-section {
    padding: var(--section-padding);
    background: var(--color-bg-secondary);
    position: relative;
    overflow: hidden;
}

.references-section::before {
    content: '🏆';
    position: absolute;
    top: 5%;
    right: 5%;
    font-size: 10rem;
    opacity: 0.04;
    pointer-events: none;
}

.references-section::after {
    content: '✓';
    position: absolute;
    bottom: 5%;
    left: 5%;
    font-size: 15rem;
    font-weight: 900;
    color: var(--color-success);
    opacity: 0.02;
    pointer-events: none;
}

.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.reference-card {
    background: var(--color-bg-primary);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.reference-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.reference-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
}

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

.reference-card h3 {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    font-weight: 700;
}

.reference-card p {
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: var(--space-3);
    font-size: 0.9375rem;
}

.reference-tag {
    display: inline-block;
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-primary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
}

/* ========== Course Sections (입문반 & 실전반) ========== */
.beginner-section {
    padding: var(--section-padding);
    background: var(--color-bg-primary);
}

.beginner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-5);
    margin-top: var(--space-8);
}

.beginner-card {
    background: var(--color-bg-secondary);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

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

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
}

.card-icon i {
    font-size: 2.25rem;
    color: var(--color-bg-primary);
}

.beginner-card h3 {
    font-size: 1.5rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    font-weight: 700;
}

.beginner-card p {
    color: var(--color-text-secondary);
    line-height: 1.75;
    font-size: 1.0625rem;
}

/* ========== Advanced Section ========== */
.advanced-section {
    padding: var(--section-padding);
    background: var(--color-bg-secondary);
}

.instructor-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.instructor-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
}

.instructor-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.card-label {
    background: var(--color-primary);
    color: var(--color-bg-primary);
    padding: var(--space-3) var(--space-4);
    font-weight: 700;
    font-size: 1.0625rem;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.instructor-name {
    font-size: 1.875rem;
    color: var(--color-text-primary);
    padding: var(--space-4) var(--space-5) var(--space-3);
    border-bottom: 2px solid var(--color-border);
    font-weight: 800;
}

.card-content {
    padding: var(--space-5);
}

.card-content h4 {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin: var(--space-4) 0 var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
}

.card-content h4:first-child {
    margin-top: 0;
}

.card-content h4 i {
    color: var(--color-accent);
}

.demo-list {
    list-style: none;
    padding-left: 0;
}

.demo-list li {
    padding: var(--space-2) 0 var(--space-2) var(--space-4);
    position: relative;
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.65;
}

.demo-list li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1.125rem;
}

/* ========== Instructors Section ========== */
.instructors-section {
    padding: var(--section-padding);
    background: var(--color-bg-primary);
}

.instructors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.profile-card {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

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

.profile-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--color-border);
}

.profile-avatar {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.profile-avatar i {
    font-size: 2.5rem;
    color: var(--color-bg-primary);
}

.profile-name-area h3 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.profile-role {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 600;
}

.profile-list {
    list-style: none;
    padding: 0;
}

.profile-list li {
    padding: var(--space-2) 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
}

.profile-list li i {
    color: var(--color-success);
    font-size: 1.125rem;
}

/* ========== Registration Section ========== */
.registration-section {
    padding: var(--section-padding);
    background: var(--color-bg-secondary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-5);
    margin-top: var(--space-8);
}

.info-card {
    background: var(--color-bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.info-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.info-icon {
    width: 72px;
    height: 72px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
}

.info-icon i {
    font-size: 1.875rem;
    color: var(--color-bg-primary);
}

.info-card h3 {
    font-size: 1.375rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    font-weight: 700;
}

.info-main {
    font-size: 1.625rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.info-sub {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.info-discount {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-success);
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 2px solid var(--color-border);
}

/* Price Card Styles */
.price-card .price-split {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin: var(--space-4) 0;
}

.price-item {
    flex: 1;
    text-align: center;
}

.price-label {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
    font-weight: 600;
}

.price-amount {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0;
}

.price-divider {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-tertiary);
}

.info-total {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 2px solid var(--color-border);
    text-align: center;
}

.info-total strong {
    font-size: 1.25rem;
    color: var(--color-success);
    font-weight: 800;
}

.payment-info {
    margin-top: var(--space-10);
}

.payment-box {
    background: linear-gradient(135deg, var(--color-secondary), #0F172A);
    color: var(--color-bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.payment-box h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-bg-primary);
}

.payment-details {
    background: rgba(255, 255, 255, 0.08);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.payment-details p {
    font-size: 1.125rem;
    margin-bottom: var(--space-2);
    line-height: 1.75;
}

.payment-details p:last-child {
    margin-bottom: 0;
}

.payment-details strong {
    color: var(--color-accent-light);
    font-weight: 700;
}

.payment-options {
    list-style: none;
    padding: 0;
    margin: var(--space-2) 0 0 0;
}

.payment-options li {
    padding: var(--space-2) 0;
    font-size: 1.0625rem;
    line-height: 1.65;
    position: relative;
    padding-left: var(--space-4);
}

.payment-options li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--color-accent-light);
    font-weight: 700;
}

.payment-note {
    font-size: 0.9375rem;
    opacity: 0.9;
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    line-height: 1.65;
}

.contact-info {
    margin-top: var(--space-8);
    text-align: center;
}

.contact-info h3 {
    font-size: 1.75rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    font-weight: 600;
}

.contact-item i {
    color: var(--color-primary);
    font-size: 1.375rem;
}

.final-cta {
    text-align: center;
    margin-top: var(--space-10);
    padding-top: var(--space-10);
    border-top: 2px solid var(--color-border);
}

.cta-note {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-3);
    font-weight: 600;
}

/* ========== Footer ========== */
.footer {
    background: var(--color-secondary);
    color: var(--color-bg-primary);
    padding: var(--space-10) var(--space-3) var(--space-5);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo-wrapper {
    margin-bottom: var(--space-3);
}

.footer-logo-text {
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-primary-light);
    letter-spacing: 0.05em;
}

.footer-logo h3 {
    font-size: 1.75rem;
    color: var(--color-primary-light);
    margin-bottom: var(--space-1);
}

.footer-logo p {
    opacity: 0.8;
    color: #CBD5E1;
}

.footer-links {
    display: flex;
    gap: var(--space-5);
    flex-wrap: wrap;
}

.footer-links a {
    color: #CBD5E1;
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    opacity: 0.7;
    font-size: 0.9375rem;
    color: #94A3B8;
}

/* ========== Scroll to Top Button ========== */
.scroll-top {
    position: fixed;
    bottom: 32px;
    right: var(--space-5);
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: var(--color-bg-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-base);
    z-index: 1000;
}

.scroll-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

.scroll-top.show {
    display: flex;
}

/* ========== Floating Contact Buttons ========== */
.floating-contacts {
    position: fixed;
    bottom: 102px;
    right: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 999;
}

.floating-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-base);
    text-decoration: none;
    color: white;
    font-size: 1.5rem;
}

.floating-kakao {
    background: #FEE500;
    color: #3C1E1E;
}

.floating-kakao:hover {
    background: #FFEB3B;
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 6px 16px rgba(254, 229, 0, 0.4);
}

.floating-email {
    background: #EA4335;
    color: white;
}

.floating-email:hover {
    background: #D33B2C;
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 6px 16px rgba(234, 67, 53, 0.4);
}

/* ========== Pain Points Section ========== */
.pain-points-section {
    padding: var(--section-padding);
    background: var(--color-bg-primary);
    position: relative;
    overflow: hidden;
}

.pain-points-section::before {
    content: '?';
    position: absolute;
    top: 10%;
    right: 5%;
    font-size: 20rem;
    font-weight: 900;
    color: #EF4444;
    opacity: 0.02;
    pointer-events: none;
}

.pain-points-section::after {
    content: '!';
    position: absolute;
    bottom: 10%;
    left: 5%;
    font-size: 15rem;
    font-weight: 900;
    color: var(--color-success);
    opacity: 0.02;
    pointer-events: none;
}

.pain-points-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.pain-card {
    background: var(--color-bg-secondary);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
}

.pain-card:hover {
    transform: translateY(-4px);
    border-color: #EF4444;
    box-shadow: var(--shadow-md);
}

.pain-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #EF4444, #DC2626);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-3);
}

.pain-icon i {
    font-size: 1.75rem;
    color: var(--color-bg-primary);
}

.pain-card h3 {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    font-weight: 700;
}

.pain-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.65;
}

.solution-box {
    margin-top: var(--space-8);
    background: linear-gradient(135deg, var(--color-success), #059669);
    color: var(--color-bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    box-shadow: var(--shadow-xl);
}

.solution-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.solution-icon i {
    font-size: 2.5rem;
    color: var(--color-bg-primary);
}

.solution-content h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-2);
    color: var(--color-bg-primary);
}

.solution-content p {
    font-size: 1.125rem;
    opacity: 0.95;
    line-height: 1.6;
}

/* ========== Benefits Section ========== */
.benefits-section {
    padding: var(--section-padding);
    background: var(--color-bg-secondary);
    position: relative;
    overflow: hidden;
}

.benefits-section::before {
    content: '📈';
    position: absolute;
    top: 5%;
    right: 3%;
    font-size: 12rem;
    opacity: 0.03;
    pointer-events: none;
    animation: float 10s ease-in-out infinite;
}

.benefits-section::after {
    content: '💰';
    position: absolute;
    bottom: 5%;
    left: 3%;
    font-size: 10rem;
    opacity: 0.03;
    pointer-events: none;
    animation: float 8s ease-in-out infinite reverse;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-5);
    margin-top: var(--space-8);
}

.benefit-card {
    background: var(--color-bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.benefit-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-success);
    box-shadow: var(--shadow-lg);
}

.benefit-before-after {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.before, .after {
    text-align: center;
    flex: 1;
}

.before .label, .after .label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-1);
    text-transform: uppercase;
    font-weight: 600;
}

.before .value {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-secondary);
}

.after .value {
    display: block;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-success);
}

.arrow {
    color: var(--color-primary);
    font-size: 1.25rem;
}

.benefit-card h3 {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    font-weight: 700;
}

.benefit-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.65;
}

.roi-highlight {
    margin-top: var(--space-8);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-bg-primary);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.roi-highlight i {
    font-size: 2rem;
    margin-bottom: var(--space-2);
}

.roi-highlight p {
    font-size: 1.25rem;
    line-height: 1.6;
}

.roi-highlight strong {
    font-weight: 800;
    font-size: 1.375rem;
}

/* ========== Showcase Section ========== */
.showcase-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #FFFFFF 0%, #F8FAFC 100%);
    position: relative;
    overflow: hidden;
}

.showcase-section::before {
    content: '✨';
    position: absolute;
    top: 8%;
    right: 5%;
    font-size: 10rem;
    opacity: 0.04;
    pointer-events: none;
    animation: float 12s ease-in-out infinite;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.showcase-item {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
}

.showcase-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.showcase-image {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    /* GPU 가속 최적화 */
}

/* 이미지 로딩 플레이스홀더 */
.showcase-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

.showcase-image img.loaded + .showcase-image::before {
    display: none;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.showcase-item:hover .showcase-image img {
    transform: scale(1.05);
}

.showcase-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.3) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    padding: var(--space-4);
}

.showcase-item:hover .showcase-overlay {
    opacity: 1;
}

.showcase-badge {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-bg-primary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.showcase-info {
    padding: var(--space-5);
}

.showcase-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.showcase-info p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.showcase-meta {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.showcase-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    font-weight: 600;
}

.showcase-meta span i {
    color: var(--color-accent);
    font-size: 0.875rem;
}

.showcase-cta {
    margin-top: var(--space-10);
    text-align: center;
    padding: var(--space-8);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(245, 158, 11, 0.05));
    border-radius: var(--radius-2xl);
    border: 2px dashed var(--color-primary);
}

.showcase-cta-text {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.showcase-cta-text i {
    color: var(--color-accent);
    font-size: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: 1.125rem;
    font-weight: 700;
}

/* ========== FAQ Section ========== */
.faq-section {
    padding: var(--section-padding);
    background: var(--color-bg-primary);
}

.faq-list {
    max-width: 900px;
    margin: var(--space-8) auto 0;
}

.faq-item {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    border: 2px solid var(--color-border);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    cursor: pointer;
    user-select: none;
}

.faq-question i.fa-question-circle {
    color: var(--color-primary);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.faq-question h3 {
    flex: 1;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.faq-question i.fa-chevron-down {
    color: var(--color-text-tertiary);
    font-size: 1rem;
    transition: transform var(--transition-base);
}

.faq-item.active .faq-question i.fa-chevron-down {
    transform: rotate(180deg);
}

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--space-5) var(--space-4) calc(var(--space-5) + var(--space-3) + 1.5rem);
    color: var(--color-text-secondary);
    line-height: 1.75;
    font-size: 1rem;
}

/* ========== Special Price Section ========== */
.special-price-highlight-section {
    padding: var(--section-padding);
    background: linear-gradient(180deg, #F8FAFC 0%, #EEF2FF 50%, #F8FAFC 100%);
    position: relative;
}

.special-price-section {
    margin: 0 auto;
    max-width: 900px;
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 3px solid var(--color-primary);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(37, 99, 235, 0.2);
}

.special-price-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

.special-price-badge {
    display: inline-block;
    background: linear-gradient(135deg, #F59E0B, #EF4444);
    color: white;
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-full);
    font-weight: 800;
    font-size: 1rem;
    margin-bottom: var(--space-4);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
    animation: bounce 2s ease-in-out infinite;
    position: relative;
    z-index: 1;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.special-price-badge i {
    margin-right: var(--space-1);
}

.special-price-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    position: relative;
    z-index: 1;
    line-height: 1.4;
    word-break: keep-all;
}

.original-price {
    color: #94A3B8;
    font-size: 2rem;
    text-decoration: line-through;
    text-decoration-thickness: 3px;
    opacity: 0.7;
    margin: 0 var(--space-2);
    display: inline-block;
}

.highlight-price {
    color: var(--color-primary);
    font-size: 3rem;
    text-decoration: underline;
    text-decoration-color: var(--color-accent);
    text-decoration-thickness: 4px;
    text-underline-offset: 8px;
    margin-left: var(--space-1);
    display: inline-block;
    font-weight: 900;
}

.special-price-desc {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-5);
    position: relative;
    z-index: 1;
}

.price-warning {
    background: #FEF2F2;
    border: 2px solid #EF4444;
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin: var(--space-5) 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    position: relative;
    z-index: 1;
}

.price-warning i {
    color: #EF4444;
    font-size: 1.5rem;
    animation: shake 1.5s ease-in-out infinite;
}

@keyframes shake {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-10deg); }
    75% { transform: rotate(10deg); }
}

.price-warning p {
    margin: 0;
    font-size: 1.125rem;
    color: #991B1B;
}

.price-warning strong {
    color: #7F1D1D;
    font-weight: 800;
}

.urgency-tags {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
    position: relative;
    z-index: 1;
}

.urgency-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    background: white;
    color: var(--color-primary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.875rem;
    border: 2px solid var(--color-primary-light);
    box-shadow: var(--shadow-sm);
}

.urgency-tag i {
    font-size: 1rem;
}

.special-price-cta {
    position: relative;
    z-index: 1;
}

.special-price-cta .btn {
    font-size: 1.25rem;
    padding: var(--space-4) var(--space-8);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
    animation: pulse-button 2s ease-in-out infinite;
}

@keyframes pulse-button {
    0%, 100% { transform: scale(1); box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3); }
    50% { transform: scale(1.05); box-shadow: 0 12px 32px rgba(37, 99, 235, 0.4); }
}

.cta-subtext {
    margin-top: var(--space-2);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 600;
}

/* ========== Perks Section ========== */
.perks-section {
    margin-top: var(--space-10);
    background: linear-gradient(135deg, #FFF7ED, #FFEDD5);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 2px solid var(--color-accent);
}

.perks-title {
    text-align: center;
    font-size: 1.75rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.perks-title i {
    color: var(--color-accent);
    font-size: 2rem;
}

.perks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-4);
}

.perk-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--color-bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.perk-item i {
    font-size: 1.75rem;
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 4px;
}

.perk-content h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.perk-content p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.perks-value {
    margin-top: var(--space-5);
    text-align: center;
    padding-top: var(--space-4);
    border-top: 2px solid rgba(245, 158, 11, 0.3);
}

.perks-value p {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.perks-value i {
    color: var(--color-accent);
}

.perks-value strong {
    color: var(--color-accent);
    font-weight: 800;
    font-size: 1.5rem;
}

/* ========== Testimonials Section ========== */
.testimonials-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
    position: relative;
    overflow: hidden;
}

.testimonials-section::before {
    content: '⭐';
    position: absolute;
    top: 10%;
    left: 5%;
    font-size: 8rem;
    opacity: 0.05;
    pointer-events: none;
    animation: rotate 20s linear infinite;
}

.testimonials-section::after {
    content: '💬';
    position: absolute;
    bottom: 10%;
    right: 5%;
    font-size: 10rem;
    opacity: 0.05;
    pointer-events: none;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-5);
    margin-top: var(--space-8);
}

.testimonial-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    font-size: 4rem;
    color: var(--color-primary);
    opacity: 0.1;
    font-family: Georgia, serif;
    line-height: 1;
}

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

.testimonial-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    position: relative;
    z-index: 1;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.testimonial-avatar i {
    font-size: 2rem;
    color: var(--color-bg-primary);
}

.testimonial-info {
    flex: 1;
}

.testimonial-info h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.business-type {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    margin: 0;
}

.rating {
    display: flex;
    gap: 2px;
}

.rating i {
    color: #FBBF24;
    font-size: 0.875rem;
}

.testimonial-content {
    position: relative;
    z-index: 1;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    font-style: italic;
}

.testimonial-result {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.result-tag {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-success), #059669);
    color: var(--color-bg-primary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
}

.testimonials-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    margin-top: var(--space-10);
    padding: var(--space-6);
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: 1rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* ========== Section Decorations ========== */
.section-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    opacity: 0.5;
}

.section-decoration::before {
    content: '';
    position: absolute;
    top: 10%;
    right: 5%;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 4s ease-in-out infinite;
}

.section-decoration::after {
    content: '';
    position: absolute;
    bottom: 15%;
    left: 8%;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 5s ease-in-out infinite reverse;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.8;
    }
}

.beginner-section,
.advanced-section {
    position: relative;
}

/* ========== Responsive Design ========== */
/* 터치 디바이스 최적화 */
@media (hover: none) and (pointer: coarse) {
    /* 터치 타겟 크기 증가 */
    .btn {
        min-height: 44px;
        padding: var(--space-3) var(--space-6);
    }
    
    /* 터치 인터랙션 개선 */
    .showcase-item,
    .reference-card,
    .testimonial-card,
    .info-card,
    .beginner-card {
        -webkit-tap-highlight-color: rgba(37, 99, 235, 0.1);
    }
    
    /* 호버 효과 비활성화 및 터치 효과로 대체 */
    .showcase-item:active,
    .reference-card:active,
    .testimonial-card:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
}

/* 태블릿 및 중형 모바일 (768px 이하) */
@media (max-width: 768px) {
    :root {
        --section-padding: 48px 20px;
    }
    
    /* 타이포그래피 최적화 */
    h1 { 
        font-size: 2.5rem;
        line-height: 1.25;
    }
    h2 { 
        font-size: 2rem;
        line-height: 1.3;
    }
    h3 { 
        font-size: 1.5rem;
        line-height: 1.35;
    }
    
    /* Hero Section 모바일 최적화 */
    .hero-section {
        padding: var(--space-12) var(--space-3);
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.2;
        margin-bottom: var(--space-3);
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
        line-height: 1.6;
        margin-bottom: var(--space-6);
    }
    
    .hero-visual-icons {
        gap: var(--space-2);
        margin: var(--space-5) 0;
    }
    
    .floating-icon {
        width: 55px;
        height: 55px;
    }
    
    .floating-icon svg {
        width: 24px;
        height: 24px;
    }
    
    .hero-features {
        flex-direction: column;
        gap: var(--space-2);
        margin: var(--space-5) 0;
    }
    
    .feature-item {
        width: 100%;
        justify-content: flex-start;
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
        gap: var(--space-3);
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        min-height: 52px;
        font-size: 1rem;
    }
    
    /* 섹션 타이틀 */
    .section-title {
        font-size: 2rem;
        line-height: 1.25;
        margin-bottom: var(--space-3);
    }
    
    .section-label {
        margin-bottom: var(--space-2);
    }
    
    .section-desc {
        font-size: 1rem;
        line-height: 1.7;
        margin-bottom: 0;
    }
    
    .section-header-content {
        margin-bottom: 0;
    }
    
    /* Section Header Responsive */
    .section-header {
        text-align: center;
        margin-bottom: var(--space-6);
    }
    
    .section-header-content {
        max-width: 100%;
    }
    
    /* 그리드 레이아웃 단일 컬럼 */
    .beginner-grid,
    .instructor-cards,
    .instructors-grid,
    .references-grid,
    .info-grid,
    .pain-points-grid,
    .benefits-grid,
    .perks-grid,
    .testimonials-grid,
    .showcase-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    /* Showcase 섹션 모바일 최적화 */
    .showcase-cta-text {
        font-size: 1.125rem;
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .showcase-item {
        padding: var(--space-4);
    }
    
    .showcase-image {
        height: 240px;
    }
    
    /* Testimonials 모바일 최적화 */
    .testimonials-stats {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .stat-item {
        padding: var(--space-4) var(--space-3);
    }
    
    /* 기타 레이아웃 최적화 */
    .solution-box {
        flex-direction: column;
        text-align: center;
        gap: var(--space-3);
    }
    
    .benefit-before-after {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .benefit-side {
        padding: var(--space-4);
    }
    
    /* Footer 모바일 최적화 */
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-6);
    }
    
    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .contact-methods {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    /* Special Price Section 모바일 */
    .special-price-highlight-section {
        padding: var(--space-8) var(--space-4);
    }
    
    .special-price-section {
        padding: var(--space-6) var(--space-4);
    }
    
    .special-price-title {
        font-size: 1.5rem;
        line-height: 1.5;
        margin-bottom: var(--space-3);
    }
    
    .original-price {
        font-size: 1.25rem;
        display: inline-block;
        margin: 0 var(--space-1);
    }
    
    .highlight-price {
        font-size: 2rem;
        display: inline-block;
        margin: 0 var(--space-1);
    }
    
    .special-price-desc {
        font-size: 1rem;
    }
    
    .price-warning {
        flex-direction: column;
        text-align: center;
        padding: var(--space-3);
    }
    
    .price-warning p {
        font-size: 1rem;
    }
    
    .urgency-tags {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .urgency-tag {
        font-size: 0.8125rem;
        padding: var(--space-2) var(--space-3);
    }
    
    .special-price-cta .btn {
        width: 100%;
        font-size: 1.125rem;
        padding: var(--space-4) var(--space-5);
    }
    
    .cta-subtext {
        font-size: 0.8125rem;
    }
    
    /* FAQ 아코디언 터치 최적화 */
    .faq-item {
        margin-bottom: var(--space-3);
    }
    
    .faq-question {
        padding: var(--space-4);
        min-height: 64px;
    }
    
    .faq-answer {
        padding: var(--space-4);
    }
}

@media (max-width: 768px) {
    .logo-container img {
        width: 100px;
        height: 100px;
    }
}

/* 소형 모바일 (480px 이하) */
@media (max-width: 480px) {
    :root {
        --section-padding: 40px 16px;
    }
    
    /* 컨테이너 패딩 최적화 */
    .container {
        padding: 0 var(--space-2);
    }
    
    /* 로고 크기 조정 */
    .logo-container {
        padding: var(--space-3);
    }
    
    .logo-container img {
        width: 90px;
        height: 90px;
    }
    
    /* 타이포그래피 소형 화면 최적화 */
    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
        margin-bottom: var(--space-2);
    }
    
    .hero-main-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.6;
    }
    
    .section-title {
        font-size: 1.75rem;
        line-height: 1.3;
        margin-bottom: var(--space-2);
    }
    
    .section-label {
        margin-bottom: var(--space-1);
        font-size: 0.75rem;
    }
    
    .section-desc {
        font-size: 0.9375rem;
        margin-bottom: 0;
    }
    
    /* Section Header 간격 더욱 축소 */
    .section-header {
        margin-bottom: var(--space-5);
    }
    
    .showcase-image {
        height: 200px;
    }
    
    /* 버튼 최적화 */
    .btn {
        padding: var(--space-3) var(--space-4);
        font-size: 0.9375rem;
        min-height: 48px;
    }
    
    .btn-large {
        padding: var(--space-4) var(--space-5);
        font-size: 1rem;
    }
    
    /* Hero Section 아이콘 */
    .floating-icon {
        width: 48px;
        height: 48px;
    }
    
    .floating-icon svg {
        width: 20px;
        height: 20px;
    }
    
    /* 카드 패딩 최적화 */
    .showcase-item,
    .reference-card,
    .testimonial-card,
    .info-card,
    .beginner-card,
    .benefit-card {
        padding: var(--space-3);
    }
    
    .showcase-meta {
        flex-direction: column;
        gap: var(--space-2);
        align-items: flex-start;
    }
    
    /* Payment Box */
    .payment-box {
        padding: var(--space-5) var(--space-3);
    }
    
    /* Scroll to Top & Floating Contacts 모바일 */
    .scroll-top {
        width: 48px;
        height: 48px;
        bottom: 20px;
        right: 20px;
    }
    
    .floating-contacts {
        bottom: 82px;
        right: 20px;
        gap: 10px;
    }
    
    .floating-btn {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    
    /* Stats 최적화 */
    .stat-value {
        font-size: 2rem;
    }
    
    /* Testimonial Rating */
    .testimonial-rating {
        font-size: 1rem;
    }
    
    /* FAQ 질문 */
    .faq-question {
        font-size: 1rem;
        padding: var(--space-3);
        min-height: 56px;
    }
    
    .faq-answer {
        font-size: 0.9375rem;
        padding: var(--space-3);
    }
    
    /* 배지 및 레이블 */
    .hero-badge,
    .section-label,
    .showcase-badge {
        font-size: 0.75rem;
        padding: 6px var(--space-2);
    }
    
    /* 그리드 간격 줄이기 */
    .references-grid,
    .testimonials-grid,
    .showcase-grid,
    .benefits-grid {
        gap: var(--space-3);
    }
    
    /* 스크롤 탑 버튼 위치 조정 */
    .scroll-top {
        width: 48px;
        height: 48px;
        bottom: 20px;
        right: 20px;
    }
}

/* 초소형 모바일 (360px 이하) */
@media (max-width: 360px) {
    :root {
        --section-padding: 32px 12px;
    }
    
    .container {
        padding: 0 var(--space-1);
    }
    
    /* Section Header 최소 간격 */
    .section-header {
        margin-bottom: var(--space-4);
    }
    
    .section-label {
        margin-bottom: 6px;
        font-size: 0.6875rem;
        padding: 6px var(--space-2);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--space-2);
    }
    
    .section-desc {
        font-size: 0.875rem;
        margin-bottom: 0;
    }
    
    .section-header-content {
        margin-bottom: 0;
    }
    
    .btn {
        font-size: 0.875rem;
        padding: var(--space-2) var(--space-3);
    }
    
    .floating-icon {
        width: 40px;
        height: 40px;
    }
    
    .showcase-image {
        height: 180px;
    }
}

/* ========== 모바일 성능 최적화 ========== */
/* 스크롤 성능 최적화 */
@media (max-width: 768px) {
    /* GPU 가속 활성화 */
    .hero-section,
    .showcase-item,
    .reference-card,
    .testimonial-card {
        transform: translateZ(0);
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
    }
    
    /* 스크롤 시 애니메이션 비활성화 (성능 향상) */
    @media (prefers-reduced-motion: reduce) {
        *,
        *::before,
        *::after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
    }
    
    /* 터치 스크롤 최적화 */
    body {
        -webkit-overflow-scrolling: touch;
    }
    
    /* 이미지 로딩 최적화 */
    img {
        content-visibility: auto;
    }
}

/* 가로 모드 최적화 (모바일 가로) */
@media (max-width: 768px) and (orientation: landscape) {
    .hero-section {
        padding: var(--space-8) var(--space-3);
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-visual-icons {
        gap: var(--space-1);
    }
    
    .floating-icon {
        width: 45px;
        height: 45px;
    }
}

/* ========== Animations ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes floatIcon {
    0%, 100% {
        transform: translateY(0px) translateZ(0);
    }
    50% {
        transform: translateY(-15px) translateZ(0);
    }
}

/* 모바일에서 애니메이션 단순화 */
@media (max-width: 768px) {
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(15px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    @keyframes floatIcon {
        0%, 100% {
            transform: translateY(0px);
        }
        50% {
            transform: translateY(-8px);
        }
    }
}

/* 부드러운 포커스 스타일 */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* 터치 디바이스 포커스 최적화 */
@media (hover: none) and (pointer: coarse) {
    *:focus-visible {
        outline: 3px solid var(--color-primary);
        outline-offset: 3px;
    }
}

/* 선택 영역 스타일 */
::selection {
    background-color: var(--color-primary);
    color: var(--color-bg-primary);
}

/* ========== 접근성 최적화 ========== */
/* 고대비 모드 지원 */
@media (prefers-contrast: high) {
    :root {
        --color-text-primary: #000000;
        --color-bg-primary: #FFFFFF;
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* 다크모드 지원 (선택적) */
@media (prefers-color-scheme: dark) {
    /* 필요시 다크모드 스타일 추가 가능 */
}