/* ===================================
   AIGifta Official Website Styles
   Modern, High-end, Responsive Design
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #10B981;
    --primary-dark: #059669;
    --primary-light: #34D399;
    --secondary: #1F2937;
    --accent: #6366F1;
    
    /* Neutrals */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --black: #000000;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #10B981 0%, #059669 100%);
    --gradient-dark: linear-gradient(135deg, #1F2937 0%, #111827 100%);
    --gradient-accent: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Typography */
    --font-family: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 100px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-500);
    text-align: center;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background: var(--gradient-primary);
    color: var(--white);
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: var(--radius);
    transition: var(--transition);
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background: transparent;
    color: var(--gray-700);
    font-weight: 600;
    font-size: 0.9375rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    transition: var(--transition);
}

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

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

/* ===================================
   Disclaimer Modal
   =================================== */
.disclaimer-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 24px;
    opacity: 1;
    transition: var(--transition);
}

.disclaimer-modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.disclaimer-content {
    background: var(--white);
    padding: 48px;
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    text-align: center;
}

.disclaimer-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.disclaimer-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin-bottom: 16px;
    line-height: 1.7;
    text-align: left;
}

.disclaimer-content .btn-primary {
    width: 100%;
    margin-top: 16px;
    padding: 16px;
}

.no-show-again {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--gray-500);
    cursor: pointer;
}

.no-show-again input {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-100);
}

.nav {
    height: 72px;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-600);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-chip {
    display: inline-flex;
    align-items: center;
    max-width: 220px;
    padding: 8px 14px;
    border-radius: var(--radius-full);
    background: var(--gray-100);
    color: var(--gray-700);
    font-size: 0.8125rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-actions .btn-outline {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.nav-actions .btn-primary {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: var(--transition);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 560px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--gray-900);
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-500);
    margin-bottom: 40px;
    line-height: 1.6;
}

/* ===================================
   Product Page
   =================================== */
.product-page {
    padding-top: 72px;
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(16, 185, 129, 0.14), transparent 32%),
        linear-gradient(180deg, #f6fbf9 0%, #ffffff 100%);
}

.product-hero {
    padding: 88px 0 36px;
}

.product-kicker {
    display: inline-block;
    margin-bottom: 16px;
    padding: 8px 14px;
    border-radius: var(--radius-full);
    background: rgba(16, 185, 129, 0.12);
    color: var(--primary-dark);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.product-grid-section {
    padding: 0 0 80px;
}

.product-toolbar {
    margin-bottom: 20px;
}

.product-search {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid rgba(31, 41, 55, 0.08);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow-sm);
    font-size: 0.95rem;
}

.product-status {
    margin-bottom: 16px;
    color: var(--gray-500);
    font-size: 0.95rem;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.product-card {
    padding: 22px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(31, 41, 55, 0.08);
    box-shadow: var(--shadow);
}

.product-card-head,
.product-card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.product-card h3 {
    margin: 18px 0 12px;
    font-size: 1.2rem;
    color: var(--gray-900);
}

.product-sku {
    font-size: 0.82rem;
    color: var(--gray-500);
}

.product-price {
    font-weight: 700;
    color: var(--primary-dark);
}

.product-meta {
    margin-bottom: 18px;
    color: var(--gray-500);
    font-size: 0.92rem;
}

.product-card-foot {
    flex-wrap: wrap;
    color: var(--gray-600);
    font-size: 0.85rem;
}

@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .product-grid {
        grid-template-columns: 1fr;
    }

    .product-card-head,
    .product-card-foot {
        flex-direction: column;
        align-items: flex-start;
    }
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Card Stack */
.hero-cards {
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.card-stack {
    position: relative;
    width: 360px;
    height: 430px;
}

.card-item {
    position: absolute;
    width: 320px;
    height: 200px;
    border-radius: var(--radius-lg);
    padding: 24px;
    color: var(--white);
    transition: var(--transition);
    box-shadow: var(--shadow-xl);
}

.card-item.card-green {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    transform: rotate(-5deg) translateY(0);
    z-index: 3;
}

.card-item.card-black {
    background: linear-gradient(135deg, #374151 0%, #111827 100%);
    transform: rotate(3deg) translateY(80px) translateX(40px);
    z-index: 2;
}

.card-item.card-red {
    background: linear-gradient(135deg, #DC2626 0%, #991B1B 100%);
    transform: rotate(-2deg) translateY(160px) translateX(-20px);
    z-index: 1;
}

.card-stack:hover .card-item.card-green {
    transform: rotate(-8deg) translateY(-10px);
}

.card-stack:hover .card-item.card-black {
    transform: rotate(6deg) translateY(90px) translateX(50px);
}

.card-stack:hover .card-item.card-red {
    transform: rotate(-5deg) translateY(180px) translateX(-30px);
}

.card-chip {
    width: 40px;
    height: 30px;
    background: linear-gradient(135deg, #EAB308 0%, #CA8A04 100%);
    border-radius: 4px;
    margin-bottom: 30px;
}

.card-logo {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.card-number {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.card-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
}

.card-brand {
    font-weight: 700;
    font-size: 1rem;
    font-style: italic;
}

/* ===================================
   Merchants Section
   =================================== */
.merchants {
    padding: 60px 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-100);
}

.merchants-title {
    text-align: center;
    font-size: 0.9375rem;
    color: var(--gray-500);
    margin-bottom: 32px;
}

.merchants-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.merchant-logo {
    opacity: 0.7;
    transition: var(--transition);
    filter: grayscale(50%);
}

.merchant-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
    transform: scale(1.05);
}

.merchant-logo img {
    height: 36px;
    width: auto;
    object-fit: contain;
}

/* ===================================
   AI Models Section
   =================================== */
.ai-models {
    padding: 80px 0;
    background: var(--gray-50);
}

.ai-icons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.ai-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.ai-icon-circle {
    width: 64px;
    height: 64px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.ai-icon-circle svg {
    width: 28px;
    height: 28px;
    color: var(--gray-700);
}

.ai-icon-circle.count {
    font-weight: 700;
    font-size: 1rem;
    color: var(--gray-700);
}

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

.ai-icon span {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* ===================================
   Advantages Section
   =================================== */
.advantages {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.advantage-slider {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 48px;
    margin-top: 48px;
}

.advantage-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.advantage-nav-item {
    padding: 16px 20px;
    text-align: left;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-500);
    background: var(--gray-50);
    border-radius: var(--radius);
    transition: var(--transition);
}

.advantage-nav-item:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.advantage-nav-item.active {
    background: var(--gray-900);
    color: var(--white);
}

.advantage-content {
    position: relative;
}

.advantage-item {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    background: var(--gray-900);
    border-radius: var(--radius-lg);
    padding: 48px;
    color: var(--white);
    animation: fadeIn 0.3s ease;
}

.advantage-item.active {
    display: grid;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.advantage-text h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.advantage-text p {
    font-size: 1rem;
    color: var(--gray-300);
    line-height: 1.7;
}

.advantage-image {
    border-radius: var(--radius);
    overflow: hidden;
}

.advantage-image img {
    width: 100%;
    height: 280px;
    object-fit: cover;
}

.placeholder-img {
    width: 100%;
    height: 280px;
    background: linear-gradient(135deg, var(--gray-700) 0%, var(--gray-800) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
}

.placeholder-img span {
    color: var(--gray-400);
    font-size: 1.25rem;
}

/* ===================================
   Compliance Section
   =================================== */
.compliance {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.compliance-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

/* ===================================
   Auth Modal
   =================================== */
.auth-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    padding: 20px;
}

.auth-modal.active {
    display: flex;
}

.auth-modal-dialog {
    position: relative;
    width: 100%;
    max-width: 460px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-2xl);
}

.auth-close {
    position: absolute;
    top: 14px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gray-100);
    color: var(--gray-500);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 22px;
    margin-bottom: 18px;
}

.auth-tab {
    padding: 10px 0;
    border-radius: var(--radius);
    background: var(--gray-100);
    color: var(--gray-600);
    font-weight: 600;
}

.auth-tab.active {
    background: var(--gray-900);
    color: var(--white);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-label {
    display: block;
    margin: 12px 0 6px;
    font-size: 0.875rem;
    color: var(--gray-700);
    font-weight: 600;
}

.auth-input {
    width: 100%;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 11px 12px;
    font-size: 0.9375rem;
    outline: none;
}

.auth-input:focus {
    border-color: var(--primary);
}

.auth-code-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.code-btn {
    min-width: 120px;
    padding: 10px 12px;
}

.auth-submit {
    width: 100%;
    margin-top: 16px;
    padding: 12px;
}

.auth-tips {
    margin-top: 10px;
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.auth-tips a {
    color: var(--primary-dark);
    font-weight: 600;
}

.auth-message {
    min-height: 24px;
    margin-top: 10px;
    color: #047857;
    font-size: 0.875rem;
}

.auth-message.error {
    color: #b91c1c;
}

.compliance-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.compliance-icon {
    width: 64px;
    height: 64px;
    background: var(--gray-900);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.compliance-icon svg {
    width: 32px;
    height: 32px;
    color: var(--white);
}

.compliance-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.compliance-card p {
    font-size: 0.9375rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ===================================
   Personal Section
   =================================== */
.personal {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.personal-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.personal-card-display {
    position: relative;
}

.physical-card {
    position: relative;
    width: 100%;
    max-width: 400px;
    aspect-ratio: 4/5;
    background: linear-gradient(135deg, #374151 0%, #111827 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 40px;
    overflow: hidden;
}

.card-glow {
    position: absolute;
    top: 20%;
    right: 20%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.3) 0%, transparent 70%);
    filter: blur(40px);
}

.physical-card-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
}

.card-chip-icon {
    width: 72px;
    height: 72px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.card-chip-icon svg {
    width: 36px;
    height: 36px;
}

.physical-card-inner h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.physical-card-inner p {
    font-size: 0.9375rem;
    color: var(--gray-300);
}

.personal-info .tag {
    display: inline-block;
    padding: 6px 12px;
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.personal-info h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.personal-desc {
    font-size: 1.125rem;
    color: var(--gray-500);
    margin-bottom: 32px;
}

.personal-info .btn-primary {
    margin-bottom: 40px;
}

.personal-info .arrow {
    margin-left: 8px;
    transition: var(--transition);
}

.personal-info .btn-primary:hover .arrow {
    transform: translateX(4px);
}

.personal-features {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.personal-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--gray-50);
    border-radius: var(--radius);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.feature-icon svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

.personal-feature span {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* ===================================
   Testimonials Section
   =================================== */
.testimonials {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.testimonial-slider {
    position: relative;
    overflow: hidden;
}

.testimonial-track {
    display: flex;
    gap: 32px;
    transition: var(--transition-slow);
}

.testimonial-card {
    flex: 0 0 calc(33.333% - 22px);
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.testimonial-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.testimonial-brand span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-700);
}

.testimonial-text {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.author-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-700);
}

.testimonial-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--gray-300);
    border-radius: 50%;
    transition: var(--transition);
}

.dot.active {
    background: var(--gray-700);
    width: 24px;
    border-radius: var(--radius-full);
}

/* ===================================
   Experience Section
   =================================== */
.experience {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 200px);
    gap: 24px;
}

.experience-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
}

.experience-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.experience-card:hover img {
    transform: scale(1.05);
}

.experience-card.large {
    grid-column: span 2;
    grid-row: span 2;
}

.experience-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: var(--white);
}

.experience-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.experience-info span {
    font-size: 0.875rem;
    color: var(--gray-300);
}

/* ===================================
   About Section
   =================================== */
.about {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.about-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 64px;
}

.about-desc {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.8;
}

/* Stats */
.stats {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-bottom: 80px;
    padding: 48px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.stat-plus {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-400);
}

.stat-label {
    display: block;
    font-size: 0.9375rem;
    color: var(--gray-500);
    margin-top: 8px;
}

/* Tech Advantages */
.tech-advantages {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.tech-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.tech-icon {
    width: 48px;
    height: 48px;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.tech-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.tech-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.tech-card p {
    font-size: 0.9375rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* Partners */
.partners {
    text-align: center;
}

.partners-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 32px;
}

.partners-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.partner-logo {
    opacity: 0.8;
    transition: var(--transition);
}

.partner-logo:hover {
    opacity: 1;
    transform: scale(1.05);
}

.partner-logo img {
    height: 32px;
    width: auto;
    object-fit: contain;
}

/* ===================================
   Announcements Section
   =================================== */
.announcements {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.announcement-list {
    display: grid;
    gap: 24px;
}

.announcement-card {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.announcement-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 32px;
    background: var(--white);
    border-bottom: 1px solid var(--gray-100);
}

.announcement-icon {
    font-size: 1.5rem;
}

.announcement-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
}

.announcement-content {
    padding: 24px 32px;
}

.announcement-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 16px 0 8px;
}

.announcement-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 12px;
}

.announcement-content ul {
    padding-left: 20px;
    margin-bottom: 16px;
}

.announcement-content li {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 8px;
    list-style: disc;
}

.announcement-note {
    color: var(--primary) !important;
    font-weight: 600;
}

.announcement-signature {
    font-weight: 600;
    color: var(--gray-700) !important;
    margin-top: 24px !important;
}

/* ===================================
   Help / FAQ Section
   =================================== */
.help {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--gray-50);
}

.faq-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--gray-400);
    transition: var(--transition);
}

.faq-item.open .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

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

.faq-answer p,
.faq-answer ul,
.faq-answer ol {
    padding: 0 24px 20px;
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

.faq-answer ol {
    padding-left: 44px;
}

.faq-answer li {
    margin-bottom: 8px;
}

.faq-answer strong {
    color: var(--gray-700);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-icon {
    background: var(--white);
    color: var(--primary);
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-desc {
    font-size: 0.9375rem;
    color: var(--gray-400);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    font-size: 0.9375rem;
    color: var(--gray-400);
}

.footer-column a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .card-stack {
        margin: 0 auto;
    }
    
    .advantage-slider {
        grid-template-columns: 1fr;
    }
    
    .advantage-nav {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 16px;
    }
    
    .advantage-nav-item {
        white-space: nowrap;
        flex-shrink: 0;
    }
    
    .advantage-item {
        grid-template-columns: 1fr;
    }
    
    .compliance-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .personal-content {
        grid-template-columns: 1fr;
    }
    
    .personal-card-display {
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .testimonial-card {
        flex: 0 0 calc(50% - 16px);
    }
    
    .experience-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
    
    .experience-card.large {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .tech-advantages {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-links,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links.active {
        display: flex;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--white);
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-actions.active {
        display: flex;
        position: absolute;
        top: calc(72px + 200px);
        left: 0;
        right: 0;
        justify-content: center;
        background: var(--white);
        padding: 24px;
        box-shadow: var(--shadow-lg);
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .card-stack {
        width: 280px;
        height: 380px;
    }
    
    .card-item {
        width: 260px;
        height: 160px;
    }
    
    .compliance-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonial-card {
        flex: 0 0 100%;
    }
    
    .experience-grid {
        grid-template-columns: 1fr;
    }
    
    .experience-card.large {
        grid-column: span 1;
    }
    
    .stats {
        flex-direction: column;
        gap: 32px;
        padding: 32px;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .merchants-logos {
        gap: 24px;
    }
    
    .partners-grid {
        gap: 24px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .disclaimer-content {
        padding: 32px 24px;
    }
    
    .personal-features {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-lg {
        width: 100%;
    }
    
    .ai-icons {
        gap: 20px;
    }
    
    .ai-icon-circle {
        width: 52px;
        height: 52px;
    }
    
    .advantage-item {
        padding: 32px 24px;
    }
    
    .physical-card {
        aspect-ratio: 3/4;
    }
    
    .personal-info h2 {
        font-size: 2rem;
    }

    .auth-modal-dialog {
        padding: 20px;
    }

    .auth-code-row {
        grid-template-columns: 1fr;
    }

    .code-btn {
        width: 100%;
    }
}

/* ===================================
   Animations
   =================================== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.card-stack {
    animation: float 6s ease-in-out infinite;
}

/* Scroll reveal animation classes */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}