/* =========================================
   全新清新极简风格
   ========================================= */

/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 清新明亮主色调 */
    --primary: #6366F1;
    --primary-light: #818CF8;
    --primary-dark: #4F46E5;
    
    /* 辅助色 */
    --secondary: #10B981;
    --accent: #F43F5E;
    --warning: #F59E0B;
    
    /* 浅色背景 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --bg-accent: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* 文本色 */
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --text-light: #64748B;
    
    /* 边框和分割线 */
    --border-color: #E2E8F0;
    --border-light: #F1F5F9;
    
    /* 渐变 */
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    
    /* 阴影 - 更加柔和 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.12);
    --shadow-colored: 0 8px 32px rgba(99, 102, 241, 0.15);
    
    /* 圆角 - 更加圆润 */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.25s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-secondary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 5px;
}

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

/* 选择文本样式 */
::selection {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-dark);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

/* =========================================
   导航栏
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 32px;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-hero);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    font-weight: 800;
    box-shadow: var(--shadow-colored);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: logoShine 3s infinite;
}

@keyframes logoShine {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--gradient-hero);
    transition: width 0.3s ease, left 0.3s ease;
    border-radius: 2px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 60%;
    left: 20%;
}

.btn-primary {
    background: var(--gradient-hero);
    color: white;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
    transition: var(--transition);
    box-shadow: var(--shadow-colored);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(99, 102, 241, 0.3);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    width: 30px;
    padding: 5px;
}

.hamburger span {
    width: 100%;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -7px);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    overflow: hidden;
    background: var(--bg-primary);
}

/* 背景网格 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.5;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top right, rgba(99, 102, 241, 0.08) 0%, transparent 50%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 8rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    position: relative;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 2rem;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

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

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 540px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 4rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.125rem 2.5rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.05rem;
    transition: var(--transition);
}

.btn-large {
    font-size: 1.1rem;
    padding: 1.25rem 2.75rem;
}

.btn-gradient {
    background: var(--gradient-hero);
    color: white;
    box-shadow: var(--shadow-colored);
}

.btn-gradient:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(99, 102, 241, 0.35);
}

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

.btn-outline:hover {
    border-color: var(--primary);
    background: var(--bg-secondary);
    transform: translateY(-3px);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border-color);
}

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

.stat-number {
    display: block;
    font-size: 2.25rem;
    font-weight: 900;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.card-stack {
    position: relative;
    width: 380px;
    height: 500px;
    perspective: 1200px;
}

.card {
    position: absolute;
    width: 100%;
    height: 100%;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.card-word {
    top: 0;
    left: 0;
    z-index: 3;
    animation: cardFloat 5s ease-in-out infinite;
    transform: translateZ(80px) rotateY(-8deg);
}

.card-excel {
    top: 50px;
    left: 35px;
    z-index: 2;
    opacity: 0.85;
    animation: cardFloat 5s ease-in-out infinite -0.8s;
    transform: translateZ(50px) rotateY(8deg) rotateX(3deg);
}

.card-ppt {
    top: 100px;
    left: 70px;
    z-index: 1;
    opacity: 0.7;
    animation: cardFloat 5s ease-in-out infinite -1.6s;
    transform: translateZ(20px) rotateY(4deg);
}

@keyframes cardFloat {
    0%, 100% { 
        transform: translateZ(var(--z, 80px)) rotateY(var(--ry, -8deg)) translateY(0); 
    }
    50% { 
        transform: translateZ(var(--z, 80px)) rotateY(var(--ry, -8deg)) translateY(-25px); 
    }
}

.card-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-hero);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 900;
    color: white;
    box-shadow: var(--shadow-colored);
}

.card span {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* =========================================
   Sections Common
   ========================================= */
section {
    padding: 7rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-subtitle {
    display: inline-block;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 2.75rem;
    font-weight: 900;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* =========================================
   Features Section
   ========================================= */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 3rem 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-hero);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    color: white;
    font-size: 1.75rem;
}

.feature-icon-1 {
    background: var(--gradient-hero);
}

.feature-icon-2 {
    background: var(--gradient-success);
}

.feature-icon-3 {
    background: var(--gradient-accent);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.625rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.feature-list li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
    font-size: 1rem;
}

/* =========================================
   Cloud Section
   ========================================= */
.cloud-section {
    background: var(--bg-primary);
    position: relative;
}

.cloud-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.cloud-text {
    z-index: 1;
}

.cloud-text h2 {
    font-size: 2.75rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.cloud-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.cloud-features {
    display: grid;
    gap: 1.5rem;
}

.cloud-feature {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.cloud-feature:hover {
    border-color: var(--primary);
    transform: translateX(8px);
    box-shadow: var(--shadow-sm);
}

.check-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-hero);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.875rem;
    font-weight: 700;
    color: white;
}

.cloud-feature h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.cloud-feature p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.6;
}

.cloud-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.devices {
    position: relative;
    width: 500px;
    height: 400px;
}

.device {
    position: absolute;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: deviceFloat 6s ease-in-out infinite;
}

.device.desktop {
    width: 280px;
    height: 200px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    animation-delay: 0s;
}

.device.desktop .screen {
    background: var(--gradient-hero);
    margin: 12px;
    height: 170px;
    border-radius: 6px;
}

.device.tablet {
    width: 140px;
    height: 180px;
    top: 15%;
    right: 10%;
    z-index: 2;
    animation-delay: -1.5s;
}

.device.tablet .screen {
    background: var(--gradient-success);
    margin: 10px;
    height: 160px;
    border-radius: 6px;
}

.device.phone {
    width: 80px;
    height: 140px;
    bottom: 15%;
    left: 5%;
    z-index: 1;
    animation-delay: -3s;
}

.device.phone .screen {
    background: var(--gradient-accent);
    margin: 8px;
    height: 124px;
    border-radius: 6px;
}

@keyframes deviceFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* =========================================
   Platforms Section
   ========================================= */
.platforms {
    background: var(--bg-secondary);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}

.platform-item {
    background: white;
    padding: 2.5rem 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.platform-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: block;
}

.platform-item h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.platform-item p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* =========================================
   Download Section
   ========================================= */
.download {
    padding: 7rem 0;
    background: var(--bg-primary);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}

.download-card {
    background: white;
    padding: 2.5rem 1.5rem;
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-hero);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.download-card:hover::before {
    transform: scaleX(1);
}

.download-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.download-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.download-card h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.download-version {
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: block;
}

.download-size {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

.btn-download {
    display: inline-block;
    background: var(--gradient-hero);
    color: white;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.9rem;
    transition: var(--transition);
}

.download-card:hover .btn-download {
    box-shadow: var(--shadow-colored);
    transform: scale(1.05);
}

/* =========================================
   FAQ Section
   ========================================= */
.faq {
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 850px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.75rem 2.25rem;
    cursor: pointer;
    transition: background 0.3s;
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-question h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
}

.faq-toggle {
    font-size: 2rem;
    font-weight: 300;
    color: var(--primary);
    transition: transform 0.3s;
    line-height: 1;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease;
}

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

.faq-answer p {
    padding: 0 2.25rem 2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1rem;
}

/* =========================================
   Footer
   ========================================= */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 5rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 800;
    margin-bottom: 1.75rem;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 1rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.95rem;
}

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

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 48px;
    height: 48px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    transition: var(--transition);
    color: var(--text-secondary);
    font-weight: 600;
}

.social-links a:hover {
    background: var(--gradient-hero);
    border-color: transparent;
    color: white;
    transform: translateY(-4px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* =========================================
   响应式设计
   ========================================= */
@media (max-width: 1200px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 5rem;
    }

    .hero-text {
        order: 2;
    }

    .hero-visual {
        order: 1;
    }

    .hero p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .stats {
        justify-content: center;
    }

    .card-stack {
        margin: 0 auto;
    }

    .cloud-content {
        grid-template-columns: 1fr;
    }

    .cloud-visual {
        order: 1;
    }

    .cloud-text {
        order: 2;
        text-align: center;
    }

    .devices {
        width: 400px;
        height: 300px;
        margin: 0 auto;
    }
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .platform-grid,
    .download-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .navbar .container {
        padding: 1rem 20px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1.5rem;
        gap: 0.5rem;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .btn-primary {
        display: none;
    }

    section {
        padding: 5rem 0;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 320px;
    }

    .stats {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding-top: 2rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .features-grid,
    .platform-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2.5rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .card-stack {
        width: 280px;
        height: 380px;
    }

    .badge {
        font-size: 0.75rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .faq-question {
        padding: 1.25rem 1.5rem;
    }

    .faq-answer p {
        padding: 0 1.5rem 1.5rem;
    }
}