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

:root {
    /* Color Palette - Blue-Purple-Pink Theme */
    --primary-color: #5b6ff0;
    --primary-dark: #4c5fd9;
    --primary-light: #7c8ff5;
    --secondary-color: #a855f7;
    --accent-color: #ec4899;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7ff;
    --bg-tertiary: #eef2ff;
    
    --border-color: #e0e7ff;
    --shadow-sm: 0 1px 2px 0 rgba(91, 111, 240, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(91, 111, 240, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(91, 111, 240, 0.1);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

/* =============================================
   Layout Components
   ============================================= */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* =============================================
   Navigation Bar
   ============================================= */
.navbar {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #5b6ff0 0%, #a855f7 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
    transition: all var(--transition-base);
}

.nav-brand a:hover {
    filter: brightness(1.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 3px 0;
    transition: all var(--transition-base);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-base);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

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

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    padding: var(--spacing-xs);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    margin-top: var(--spacing-xs);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover,
.dropdown-menu a.active {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

/* =============================================
   Hero Section
   ============================================= */
.hero {
    background: linear-gradient(135deg, 
        #5b6ff0 0%,     /* 蓝紫 - 增加蓝色调 */
        #667eea 15%,    /* 深紫蓝 */
        #764ba2 30%,    /* 紫色 */
        #a855f7 50%,    /* 亮紫 */
        #ec4899 75%,    /* 粉红 */
        #f472b6 90%,    /* 亮粉 */
        #f0abfc 100%    /* 浅粉 */
    );
    color: white;
    padding: var(--spacing-2xl) 0 calc(var(--spacing-2xl) + var(--spacing-md)) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -25%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(91, 111, 240, 0.3) 0%, transparent 60%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -20%;
    width: 70%;
    height: 120%;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.3) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 5.5rem;
    font-weight: 900;
    margin-bottom: 2rem;
    letter-spacing: -0.05em;
    color: #ffffff;
    text-shadow: 0 0 40px rgba(255, 255, 255, 0.3),
                 0 0 80px rgba(167, 139, 250, 0.2),
                 0 4px 20px rgba(0, 0, 0, 0.15);
    position: relative;
    display: inline-block;
    filter: drop-shadow(0 4px 12px rgba(139, 92, 246, 0.3));
}

.hero-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 4px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.6) 30%,
        rgba(236, 72, 153, 0.6) 70%,
        transparent 100%
    );
    border-radius: 2px;
    box-shadow: 0 0 20px rgba(236, 72, 153, 0.4);
}

.hero-slogan {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    opacity: 0.95;
    letter-spacing: 0.025em;
    text-transform: none;
    line-height: 1.4;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.hero-description {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.7;
    opacity: 0.85;
    max-width: 650px;
    margin: 0 auto;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* =============================================
   Products Section
   ============================================= */
.products {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.product-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
    transition: all var(--transition-base);
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.product-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.product-logo {
    width: 160px;
    height: 160px;
    object-fit: contain;
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px rgba(91, 111, 240, 0.25),
                0 4px 16px rgba(168, 85, 247, 0.15);
    transition: all var(--transition-base);
}

.product-logo:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(91, 111, 240, 0.35),
                0 6px 20px rgba(168, 85, 247, 0.25);
}

.placeholder-logo {
    width: 160px;
    height: 160px;
    background: linear-gradient(135deg, #5b6ff0 0%, #a855f7 50%, #ec4899 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
    box-shadow: 0 8px 32px rgba(91, 111, 240, 0.25),
                0 4px 16px rgba(168, 85, 247, 0.15);
    transition: all var(--transition-base);
}

.placeholder-logo:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(91, 111, 240, 0.35),
                0 6px 20px rgba(168, 85, 247, 0.25);
}

.product-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.product-name {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.product-name-primary {
    font-weight: 700;
}

.product-name-separator {
    font-weight: 400;
}

.product-name-secondary {
    font-weight: 400;
}

.product-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.product-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.product-features li {
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--text-secondary);
}

.product-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #5b6ff0 0%, #a855f7 50%, #ec4899 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(91, 111, 240, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #4c5fd9 0%, #9333ea 50%, #db2777 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(91, 111, 240, 0.4);
}

/* =============================================
   Contact Section
   ============================================= */
.contact {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-primary);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-info {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.contact-item {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.contact-label {
    font-weight: 600;
    color: var(--text-primary);
}

.contact-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: underline;
    text-decoration-color: transparent;
    transition: all var(--transition-base);
    background: linear-gradient(135deg, #5b6ff0 0%, #a855f7 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: pointer;
    position: relative;
}

.contact-link:hover {
    text-decoration-color: var(--primary-color);
    filter: brightness(1.1);
}

.contact-link:active {
    transform: scale(0.98);
}

/* Email Toast Notification */
.email-toast {
    position: fixed;
    bottom: 4rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: linear-gradient(135deg, #5b6ff0 0%, #a855f7 100%);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(91, 111, 240, 0.3);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    font-size: 0.95rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 9999;
}

.email-toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast-icon {
    font-size: 1.25rem;
    font-weight: 700;
    background: white;
    color: #5b6ff0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.toast-text {
    line-height: 1;
}

/* =============================================
   Footer
   ============================================= */
.footer {
    background-color: var(--text-primary);
    color: var(--text-light);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer p {
    font-size: 0.875rem;
}

/* =============================================
   Product Detail Pages
   ============================================= */
.product-hero {
    background: linear-gradient(135deg, 
        #667eea 0%, 
        #764ba2 25%, 
        #a855f7 50%, 
        #ec4899 75%, 
        #f472b6 90%,
        #f0abfc 100%
    );
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.product-hero::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -20%;
    width: 60%;
    height: 120%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.3) 0%, transparent 60%);
    pointer-events: none;
}

.product-hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    right: -15%;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.25) 0%, transparent 60%);
    pointer-events: none;
}

.product-hero-content {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.product-hero-logo {
    margin-bottom: var(--spacing-md);
}

.product-hero-logo img {
    width: 120px;
    height: 120px;
    margin: 0 auto;
    border-radius: 28px;
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm);
}

.placeholder-logo-large {
    width: 120px;
    height: 120px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(168, 85, 247, 0.2);
}

.product-hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.3),
                 0 4px 20px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 1;
    white-space: nowrap;
}

.hero-name-primary {
    font-weight: 700;
}

.hero-name-separator {
    font-weight: 400;
}

.hero-name-secondary {
    font-weight: 400;
}

.product-hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

.product-details {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-secondary);
}

.product-section {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.product-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.product-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
}

/* Horizontal Screenshot Gallery */
.screenshot-gallery-container {
    margin-top: var(--spacing-xl);
    position: relative;
    padding: var(--spacing-md) 0;
    overflow: hidden;
}

.screenshot-gallery {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    padding: var(--spacing-sm) 0 var(--spacing-lg) 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Hide default scrollbar for Firefox */
    -ms-overflow-style: none; /* Hide default scrollbar for IE/Edge */
    scroll-snap-type: x mandatory;
}

/* Add padding to the right for galleries with more than 3 items */
.screenshot-gallery:not(.centered)::after {
    content: '';
    flex: 0 0 auto;
    width: calc((280px + var(--spacing-lg)) * 2);
    height: 1px;
}

/* Hide scrollbar for Chrome, Safari and Opera */
.screenshot-gallery::-webkit-scrollbar {
    display: none;
}

.gallery-item {
    flex: 0 0 auto;
    width: 280px;
    scroll-snap-align: start;
}

.gallery-item .device-mockup {
    max-width: 280px;
    margin: 0;
}

/* Dot Indicators */
.gallery-indicators {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.gallery-indicators.hidden {
    display: none;
}

.gallery-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-color);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
}

.gallery-dot:hover {
    background: var(--primary-light);
    transform: scale(1.2);
}

.gallery-dot.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    width: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(91, 111, 240, 0.4);
}

/* Gallery with 3 or fewer items - centered display */
.screenshot-gallery.centered {
    justify-content: center;
    overflow-x: visible;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.feature-item {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    transition: all var(--transition-base);
}

.feature-item:hover {
    background-color: var(--bg-tertiary);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.screenshot-item {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* iPhone Device Mockup */
.device-mockup {
    position: relative;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
    transition: all var(--transition-base);
}

.device-mockup:hover {
    transform: translateY(-8px);
}

.device-frame {
    position: relative;
    width: 100%;
    padding: 8px;
    background: #1a1a1a;
    border-radius: 45px;
    box-shadow: 
        0 0 0 1.5px #2a2a2a,
        0 0 0 2px #1a1a1a,
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 10px 20px rgba(0, 0, 0, 0.3),
        inset 0 0 1px rgba(255, 255, 255, 0.1);
}

.device-mockup:hover .device-frame {
    box-shadow: 
        0 0 0 1.5px #2a2a2a,
        0 0 0 2px #1a1a1a,
        0 30px 60px rgba(0, 0, 0, 0.5),
        0 15px 30px rgba(0, 0, 0, 0.4),
        inset 0 0 1px rgba(255, 255, 255, 0.1);
}

/* iPhone Notch (Dynamic Island style) */
.device-notch {
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: 90px;
    height: 26px;
    background: #000;
    border-radius: 18px;
    z-index: 10;
    box-shadow: 
        inset 0 1px 2px rgba(255, 255, 255, 0.1),
        0 2px 4px rgba(0, 0, 0, 0.3);
}

.device-notch::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 20%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: #1a1a3a;
    border-radius: 50%;
    opacity: 0.6;
}

.device-notch::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 25%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: #0a0a2a;
    border-radius: 50%;
    opacity: 0.5;
}

.device-frame img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 37px;
    position: relative;
    z-index: 1;
    object-fit: cover;
}

.screenshots-placeholder {
    text-align: center;
    padding: var(--spacing-2xl);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 2px dashed var(--border-color);
}

.placeholder-text {
    color: var(--text-light);
    font-size: 1.125rem;
}

/* =============================================
   Legal Section
   ============================================= */
.legal-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-tertiary);
}

.legal-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    text-align: center;
}

.legal-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.legal-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-base);
    font-weight: 500;
}

.legal-link:hover {
    border-color: var(--secondary-color);
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.15);
    transform: translateY(-2px);
}

.legal-icon {
    font-size: 1.25rem;
}

/* =============================================
   Responsive Design
   ============================================= */

/* Tablet */
@media (max-width: 768px) {
    .hero-title {
        font-size: 4rem;
        margin-bottom: 1.5rem;
    }
    
    .hero-slogan {
        font-size: 1.35rem;
        margin-bottom: 1.25rem;
    }
    
    .hero-description {
        font-size: 0.95rem;
    }
    
    .product-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .product-image {
        margin: 0 auto;
    }
    
    .product-name {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .product-hero-title {
        font-size: 2.25rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-item {
        width: 240px;
    }
    
    .gallery-item .device-mockup {
        max-width: 240px;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .device-mockup {
        max-width: 280px;
    }
    
    .legal-links {
        flex-direction: column;
        align-items: stretch;
    }
}

/* Mobile */
@media (max-width: 640px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: var(--spacing-sm);
        box-shadow: var(--shadow-md);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        max-height: 400px;
        opacity: 1;
    }
    
    .nav-link {
        padding: var(--spacing-sm);
        text-align: center;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding-left: var(--spacing-md);
        margin-top: var(--spacing-xs);
        display: none;
    }
    
    .nav-dropdown.active .dropdown-menu {
        display: block;
    }
    
    .hero-title {
        font-size: 3rem;
        letter-spacing: -0.03em;
        margin-bottom: 1.25rem;
    }
    
    .hero-title::after {
        width: 80%;
    }
    
    .hero-slogan {
        font-size: 1.15rem;
        margin-bottom: 1rem;
    }
    
    .hero-description {
        font-size: 0.9rem;
    }
    
    .product-name {
        font-size: 1.5rem;
    }
    
    .product-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .product-hero-title {
        font-size: 1.875rem;
        white-space: normal;
    }
    
    .product-section h2 {
        font-size: 1.5rem;
    }
    
    .gallery-item {
        width: 200px;
    }
    
    .gallery-item .device-mockup {
        max-width: 200px;
    }
    
    .contact-item {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}

/* =============================================
   Contact Page Styles
   ============================================= */
.contact-page {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(to bottom, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    min-height: calc(100vh - 200px);
}

.contact-page-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.contact-page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, #5b6ff0 0%, #a855f7 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-page-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Contact Form Wrapper */
.contact-form-wrapper {
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl) auto;
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    position: relative;
}

/* Form Groups */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

/* Form Inputs */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.875rem var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all var(--transition-base);
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(91, 111, 240, 0.1);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    border-color: var(--primary-light);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* Form Error States */
.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: #ef4444;
    background-color: #fef2f2;
}

.form-error {
    display: block;
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    min-height: 1.25rem;
}

/* Form Actions */
.form-actions {
    margin-top: var(--spacing-xl);
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    font-size: 1.125rem;
    position: relative;
    overflow: hidden;
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-text,
.btn-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

/* Spinner Animation */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Success Message */
.form-success {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border-radius: var(--radius-lg);
    border: 2px solid #6ee7b7;
    animation: slideDown 0.4s ease-out;
}

.success-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md) auto;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.form-success h3 {
    font-size: 1.5rem;
    color: #065f46;
    margin-bottom: var(--spacing-xs);
}

.form-success p {
    color: #047857;
    font-size: 1rem;
}

/* Error Message */
.form-error-message {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border-radius: var(--radius-lg);
    border: 2px solid #fca5a5;
    animation: shake 0.5s ease-out;
}

.error-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md) auto;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.form-error-message h3 {
    font-size: 1.5rem;
    color: #991b1b;
    margin-bottom: var(--spacing-xs);
}

.form-error-message p {
    color: #b91c1c;
    font-size: 1rem;
}

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

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

/* Direct Contact Section */
.contact-direct {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.contact-direct-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.contact-email-box {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.contact-helper-text {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

/* Contact Page Responsive */
@media (max-width: 640px) {
    .contact-page-title {
        font-size: 2rem;
    }
    
    .contact-page-subtitle {
        font-size: 1rem;
    }
    
    .contact-form-wrapper {
        padding: var(--spacing-md);
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    .btn-submit {
        padding: 0.875rem;
        font-size: 1rem;
    }
    
    .contact-direct {
        padding: var(--spacing-md);
    }
    
    .contact-email-box {
        flex-direction: column;
        text-align: center;
    }
    
    .email-box {
        padding: var(--spacing-lg);
    }
    
    .email-title {
        font-size: 1.5rem;
    }
    
    .email-address {
        font-size: 1rem;
    }
}

/* =============================================
   Simple Email Contact Section
   ============================================= */
.contact-email-section {
    max-width: 600px;
    margin: 0 auto;
}

.email-box {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.email-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.email-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.email-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.email-display {
    background-color: var(--bg-tertiary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--border-color);
}

.email-address {
    font-size: 1.125rem;
    font-weight: 600;
    background: linear-gradient(135deg, #5b6ff0 0%, #a855f7 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    word-break: break-all;
}

.btn-copy {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-base);
}

.btn-copy:hover {
    transform: translateY(-2px) scale(1.02);
}

.btn-copy:active {
    transform: translateY(0) scale(0.98);
}

.copy-icon {
    font-size: 1.125rem;
}

.email-helper-text {
    font-size: 0.8125rem;
    color: var(--text-light);
}