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

:root {
    /* WhatsApp 主色调 */
    --whatsapp-green: #25D366;
    --whatsapp-green-dark: #128C7E;
    --whatsapp-green-light: #DCF8C6;
    --whatsapp-teal: #075E54;
    --whatsapp-blue: #34B7F1;
    
    /* 辅助颜色 */
    --primary-color: var(--whatsapp-green);
    --primary-dark: var(--whatsapp-green-dark);
    --primary-light: var(--whatsapp-green-light);
    --secondary-color: var(--whatsapp-teal);
    --accent-color: var(--whatsapp-blue);
    
    /* 中性色 */
    --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;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 过渡 */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: var(--transition-normal);
}

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-logo i {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    transition: var(--transition-fast);
}

/* ==================== 英雄区域 ==================== */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-light) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e5e7eb" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 3.3rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: var(--gray-900);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* 手机模型 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 0.8s ease-out 0.2s both;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: var(--gray-900);
    border-radius: 30px;
    padding: 20px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.whatsapp-interface {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.chat-header {
    background: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--white);
    opacity: 0.9;
}

.chat-name {
    font-weight: 600;
}

.chat-status {
    font-size: 0.875rem;
    opacity: 0.9;
}

.chat-messages {
    flex: 1;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background: #ECE5DD;
}

.message {
    max-width: 80%;
    animation: messageSlide 0.3s ease-out;
}

.message.received {
    align-self: flex-start;
}

.message.sent {
    align-self: flex-end;
}

.message-content {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
}

.message.received .message-content {
    background: var(--white);
    border-bottom-left-radius: var(--radius-sm);
}

.message.sent .message-content {
    background: var(--primary-light);
    border-bottom-right-radius: var(--radius-sm);
}

.typing-indicator {
    display: flex;
    gap: 4px;
    align-items: center;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gray-400);
    animation: typing 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

/* ==================== 功能特色 ==================== */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    animation: fadeInUp 0.8s ease-out;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.3rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 400;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--gray-200);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.feature-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

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

.feature-list li {
    padding: var(--spacing-xs) 0;
    color: var(--gray-700);
    position: relative;
    padding-left: var(--spacing-lg);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* ==================== 产品介绍 - 苹果风格 ==================== */
.product-intro.apple-style {
    padding: 0;
    background: var(--white);
    position: relative;
    overflow: hidden;
}

/* 苹果风格标题区域 */
.apple-section-header {
    text-align: center;
    padding: 120px 0 80px;
    max-width: 980px;
    margin: 0 auto;
    position: relative;
}

.apple-title {
    font-size: 4rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.apple-subtitle {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 32px;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.apple-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    line-height: 1.6;
    max-width: 760px;
    margin: 0 auto;
    font-weight: 400;
}



/* 苹果风格特性展示 */
.apple-features-showcase {
    position: relative;
}

.apple-feature-section {
    padding: 100px 0;
    position: relative;
}

.apple-feature-section:nth-child(even) {
    background: var(--gray-50);
}

.apple-feature-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.apple-feature-content.reverse {
    grid-template-columns: 1fr 1fr;
}

.apple-feature-content.reverse .apple-feature-text {
    order: 2;
}

.apple-feature-content.reverse .apple-feature-visual {
    order: 1;
}

.apple-feature-description{
    margin-bottom: 30px;
}
/* 苹果风格文字内容 */
.apple-feature-text {
    padding: 40px 0;
}

.apple-feature-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 20px;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.apple-feature-subtitle {
    font-size: 1.5rem;
    color: var(--gray-600);
    margin-bottom: 40px;
    line-height: 1.4;
    font-weight: 500;
}

/* 突出显示的数字样式 */
.highlight-number {
    font-size: 2.5em;
    font-weight: 800;
    background: linear-gradient(135deg, #00ff88, #00cc6a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 255, 136, 0.3);
    display: inline-block;
    margin-right: 8px;
    animation: numberPulse 2s ease-in-out infinite;
}

@keyframes numberPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.apple-feature-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.apple-feature-point {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 1.1rem;
    color: var(--gray-700);
    line-height: 1.5;
}

.apple-point-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    flex-shrink: 0;
}

/* 苹果风格设备模拟 */
.apple-feature-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 0;
}

.apple-device-mockup {
    width: 320px;
    height: 640px;
    background: linear-gradient(145deg, #f8f9fa, #e9ecef);
    border-radius: 40px;
    padding: 20px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.1),
        0 8px 25px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.apple-device-mockup::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: var(--gray-400);
    border-radius: 3px;
}

.apple-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 30px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.apple-app-icon {
    font-size: 4rem;
    color: white;
    margin-bottom: 30px;
    opacity: 0.9;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.3));
}

.apple-screen-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

/* 聊天气泡 */
.apple-chat-bubble {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 16px 20px;
    color: white;
    font-size: 0.9rem;
    text-align: center;
    max-width: 200px;
    animation: pulse 2s infinite;
}

/* 数据可视化 */
.apple-data-visualization {
    display: flex;
    gap: 8px;
    align-items: end;
    height: 60px;
}

.apple-chart-bar {
    width: 12px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 6px;
    animation: chartGrow 2s ease-in-out infinite;
}

.apple-chart-bar:nth-child(1) {
    height: 30px;
    animation-delay: 0s;
}

.apple-chart-bar:nth-child(2) {
    height: 50px;
    animation-delay: 0.3s;
}

.apple-chart-bar:nth-child(3) {
    height: 40px;
    animation-delay: 0.6s;
}

/* 分析仪表板 */
.apple-analytics-dashboard {
    text-align: center;
}

.apple-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.apple-metric-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    line-height: 1;
}

.apple-metric-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

/* 账号网格 */
.apple-account-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    width: 120px;
}

.apple-account-item {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    animation: accountPulse 3s ease-in-out infinite;
}

.apple-account-item:nth-child(1) { animation-delay: 0s; }
.apple-account-item:nth-child(2) { animation-delay: 0.5s; }
.apple-account-item:nth-child(3) { animation-delay: 1s; }
.apple-account-item:nth-child(4) { animation-delay: 1.5s; }

/* 苹果风格滚动动画 */
.apple-feature-section {
    opacity: 0;
    transform: translateY(60px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.apple-feature-section.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.apple-feature-text {
    opacity: 0;
    transform: translateX(-40px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s;
}

.apple-feature-section.animate-in .apple-feature-text {
    opacity: 1;
    transform: translateX(0);
}

.apple-feature-visual {
    opacity: 0;
    transform: translateX(40px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.4s;
}

.apple-feature-section.animate-in .apple-feature-visual {
    opacity: 1;
    transform: translateX(0);
}

/* 反向布局的动画 */
.apple-feature-content.reverse .apple-feature-text {
    transform: translateX(40px);
}

.apple-feature-content.reverse .apple-feature-visual {
    transform: translateX(-40px);
}

.apple-feature-section.animate-in .apple-feature-content.reverse .apple-feature-text {
    transform: translateX(0);
}

.apple-feature-section.animate-in .apple-feature-content.reverse .apple-feature-visual {
    transform: translateX(0);
}

/* 设备模拟悬停效果 */
.apple-device-mockup {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.apple-device-mockup:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 
        0 30px 80px rgba(0, 0, 0, 0.15),
        0 12px 35px rgba(0, 0, 0, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

/* 特性点的悬停效果 */
.apple-feature-point {
    transition: all 0.3s ease;
    cursor: pointer;
}

.apple-feature-point:hover {
    transform: translateX(8px);
}

.apple-feature-point:hover .apple-point-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.3);
}

.product-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    max-width: 1000px;
    margin: 0 auto;
}

.product-feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border-left: 4px solid var(--primary-color);
    cursor: pointer;
    position: relative;
}

.product-feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, var(--white) 0%, var(--primary-light) 100%);
}

.product-feature-item::after {
    content: "点击查看界面截图";
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.product-feature-item:hover::after {
    opacity: 1;
    transform: translateY(0);
}

.feature-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-light), var(--white));
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 2px solid var(--primary-color);
}

.feature-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.feature-content p {
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.feature-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ==================== 产品展示 ==================== */
.product-showcase {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-light) 100%);
    position: relative;
    overflow: hidden;
}

.product-showcase::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="showcase-grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e5e7eb" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23showcase-grid)"/></svg>');
    opacity: 0.5;
}

.showcase-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.showcase-main {
    position: relative;
}

.demo-image-container {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.15),
        0 10px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    background: var(--white);
    padding: var(--spacing-md);
}

.demo-image-container:hover {
    transform: translateY(-10px);
    box-shadow: 
        0 35px 70px rgba(0, 0, 0, 0.2),
        0 15px 35px rgba(0, 0, 0, 0.15);
}

.demo-screenshot {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    display: block;
    transition: all 0.3s ease;
}

.demo-overlay {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    right: var(--spacing-md);
    bottom: var(--spacing-md);
    background: linear-gradient(
        135deg,
        rgba(37, 211, 102, 0.9) 0%,
        rgba(18, 140, 126, 0.9) 100%
    );
    border-radius: var(--radius-lg);
    opacity: 0;
    transition: all 0.4s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.demo-image-container:hover .demo-overlay {
    opacity: 1;
}

.demo-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
}

.demo-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: var(--white);
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.demo-image-container:hover .demo-feature {
    transform: translateY(0);
}

.demo-feature:nth-child(1) { transition-delay: 0.1s; }
.demo-feature:nth-child(2) { transition-delay: 0.2s; }
.demo-feature:nth-child(3) { transition-delay: 0.3s; }
.demo-feature:nth-child(4) { transition-delay: 0.4s; }

.demo-feature i {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.demo-feature span {
    font-weight: 600;
    font-size: 0.9rem;
}

.showcase-description {
    padding: var(--spacing-xl);
}

/* 产品展示区域专用样式 - 确保文字清晰可见 */
.product-showcase .section-title {
    color: var(--gray-900);
    font-weight: 800;
}

.product-showcase .section-subtitle {
    color: var(--gray-800);
    font-weight: 500;
}

.description-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.description-content p {
    color: var(--gray-800);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
    font-weight: 500;
}

.interface-highlights {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.interface-highlights li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--gray-800);
    font-weight: 600;
}

.interface-highlights i {
    color: var(--primary-color);
    font-size: 1.1rem;
    width: 20px;
}

.showcase-cta {
    margin-top: var(--spacing-xl);
}

.showcase-cta .btn {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
    font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .showcase-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .demo-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .demo-feature i {
        font-size: 1.5rem;
        width: 50px;
        height: 50px;
    }
    
    .description-content h3 {
        font-size: 1.5rem;
    }
}

/* ==================== 产品介绍 - 整合布局 ==================== */
.product-intro {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* 产品介绍区域 - 全屏幅设计 */
.product-showcase-fullwidth {
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-light) 100%);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.product-showcase-fullwidth::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="fullwidth-grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e5e7eb" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23fullwidth-grid)"/></svg>');
    opacity: 0.5;
}

.product-showcase-fullwidth .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.product-showcase-fullwidth .section-title {
    color: var(--gray-900);
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.product-showcase-fullwidth .section-subtitle {
    color: var(--gray-700);
    font-size: 1.2rem;
    margin-bottom: 50px;
    position: relative;
    z-index: 1;
}

/* 横排Tab容器 */
.horizontal-tabs-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 横排Tab导航 */
.horizontal-tabs-nav {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(25px);
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 20px;
    padding: 24px 28px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    flex: 1;
    min-width: 220px;
    max-width: 300px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.tab-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.tab-item:hover::before {
    left: 100%;
}

.tab-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    border-color: rgba(255, 255, 255, 0.35);
}

.tab-item.active {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-12px) scale(1.05);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2);
}

.tab-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #25D366, #128C7E);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 12px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.tab-item.active .tab-number {
    background: linear-gradient(135deg, #ffffff, #f0f0f0);
    color: #25D366;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.tab-content h3 {
    color: white;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.3;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tab-content p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.5;
    font-weight: 400;
}

.tab-item.active .tab-content h3 {
    color: white;
    text-shadow: 0 3px 12px rgba(0, 0, 0, 0.4);
    font-size: 1.25rem;
}

.tab-item.active .tab-content p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 0.95rem;
}

/* Tab内容展示区域 */
.tab-content-area {
    position: relative;
}

.tab-panel {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.tab-panel.active {
    display: block;
}

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

/* 全屏图片容器 */
.fullscreen-image-container {
    width: 100%;
    height: 70vh;
    min-height: 500px;
    position: relative;
    border-radius: 20px;
    overflow: hidden;
}

.screenshot-fullscreen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #075E54 0%, #128C7E 50%, #25D366 100%);
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.screenshot-fullscreen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

.screenshot-fullscreen i {
    font-size: 6rem;
    color: #FFFFFF;
    margin-bottom: 40px;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 6px 20px rgba(0, 0, 0, 0.4));
    z-index: 2;
    position: relative;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

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

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.3));
    backdrop-filter: blur(10px);
    padding: 40px;
    color: white;
    z-index: 3;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.image-overlay h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 3px 15px rgba(0, 0, 0, 0.8);
    color: #FFFFFF;
}

.panel-header {
    margin-bottom: 30px;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 20px;
}

.panel-header h2 {
    margin: 0 0 15px 0;
    color: #075E54;
    font-size: 2rem;
    font-weight: 700;
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 30px;
}

.tag {
    background: linear-gradient(135deg, #25D366, #128C7E);
    color: #FFFFFF;
    padding: 10px 18px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.2);
}

.tag:hover {
    background: linear-gradient(135deg, #128C7E, #075E54);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 211, 102, 0.4);
    border-color: rgba(255, 255, 255, 0.4);
}

.panel-content {
    display: flex;
    gap: 40px;
    height: calc(100% - 120px);
}

.screenshot-area {
    flex: 0 0 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-description {
    flex: 1;
    padding-left: 20px;
}

.feature-description h4 {
    margin: 0 0 20px 0;
    color: #075E54;
    font-size: 1.3rem;
    font-weight: 600;
}

.feature-description ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-description ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
}

.feature-description li {
    color: #FFFFFF;
    font-size: 1rem;
    line-height: 1.6;
    padding-left: 25px;
    position: relative;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
    margin-bottom: 8px;
}

.feature-description li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #25D366;
    font-weight: bold;
    font-size: 1.2rem;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
    background: rgba(37, 211, 102, 0.1);
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 产品展示主体 - 左右分栏 */
.showcase-content-inner {
    display: flex;
    gap: 60px;
    margin-top: 60px;
    align-items: flex-start;
    padding: 60px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-light) 100%);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.showcase-content-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="showcase-grid-inner" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e5e7eb" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23showcase-grid-inner)"/></svg>');
    opacity: 0.5;
    z-index: 1;
}

.product-showcase > * {
    position: relative;
    z-index: 2;
}

/* 左侧功能介绍 - 风琴效果 */
.features-sidebar {
    flex: 1;
    max-width: 500px;
}

.accordion-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 15px;
    margin-bottom: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.accordion-item:hover {
    background: var(--gray-50);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--gray-300);
}

.accordion-item.active {
    background: var(--gray-50);
    border-color: var(--primary-color);
    box-shadow: 0 12px 35px rgba(37, 211, 102, 0.2);
}

.accordion-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.accordion-header:hover {
    background: var(--gray-100);
}

.features-sidebar .feature-number {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
}

.feature-title {
    flex: 1;
}

.feature-title h3 {
    color: var(--gray-900);
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 10px 0;
    line-height: 1.3;
}

.features-sidebar .feature-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.features-sidebar .highlight {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid var(--primary-color);
}

.accordion-toggle {
    color: var(--gray-600);
    font-size: 16px;
    transition: transform 0.3s ease;
}

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

.accordion-content {
    padding: 0 25px 25px 90px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0;
}

.accordion-item.active .accordion-content {
    max-height: 300px;
    opacity: 1;
    padding-bottom: 25px;
}

.accordion-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    line-height: 1.6;
    margin: 0 0 15px 0;
}

.feature-details {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-details li {
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    padding: 5px 0;
    position: relative;
    padding-left: 20px;
}

.feature-details li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #25D366;
    font-weight: bold;
}

/* 右侧截图展示 - WhatsApp风格 */
.screenshot-display {
    flex: 1;
    max-width: 600px;
    position: relative;
}

.screenshot-container {
    position: relative;
    height: 500px;
    border-radius: 20px;
    overflow: hidden;
    background: linear-gradient(145deg, #128C7E 0%, #075E54 100%);
    box-shadow: 0 20px 60px rgba(7, 94, 84, 0.3);
}

.screenshot-placeholder {
    width: 100%;
    height: 350px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 30px;
    border: 2px dashed #25D366;
    transition: all 0.3s ease;
}

.screenshot-placeholder:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(37, 211, 102, 0.2);
}

.product-showcase .screenshot-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(37, 211, 102, 0.3);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(30px) scale(0.95);
}

.product-showcase .screenshot-placeholder.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    border-color: rgba(37, 211, 102, 0.6);
    background: rgba(255, 255, 255, 0.15);
}

.screenshot-content {
    text-align: center;
    color: white;
    padding: 40px;
    position: relative;
    z-index: 2;
}

.screenshot-content i {
    font-size: 70px;
    color: #25D366;
    margin-bottom: 25px;
    display: block;
    text-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 苹果风格动画 */
@keyframes chartGrow {
    0%, 100% { 
        transform: scaleY(0.8);
        opacity: 0.7;
    }
    50% { 
        transform: scaleY(1);
        opacity: 1;
    }
}

@keyframes accountPulse {
    0%, 100% { 
        background: rgba(255, 255, 255, 0.3);
        transform: scale(1);
    }
    50% { 
        background: rgba(255, 255, 255, 0.5);
        transform: scale(1.05);
    }
}

@keyframes appleSlideInLeft {
    from {
        opacity: 0;
        transform: translateX(-60px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes appleSlideInRight {
    from {
        opacity: 0;
        transform: translateX(60px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes appleFadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.screenshot-content h3 {
    font-size: 26px;
    margin-bottom: 20px;
    font-weight: 700;
    line-height: 1.3;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.screenshot-content p {
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.2);
}

.screenshot-note {
    background: linear-gradient(135deg, #25D366, #128C7E);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.3);
}

/* 截图导航指示器 */
.screenshot-indicators {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 35px;
}

.screenshot-indicators .indicator {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
}

.screenshot-indicators .indicator:hover {
    background: rgba(37, 211, 102, 0.6);
    transform: scale(1.1);
}

.screenshot-indicators .indicator.active {
    background: #25D366;
    transform: scale(1.3);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.5);
}

.screenshot-indicators .indicator.active::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 6px;
    height: 6px;
    background: white;
    border-radius: 50%;
}

.screenshot-placeholder i {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.screenshot-placeholder h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
}

.screenshot-placeholder p {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.6;
}

.carousel-controls {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    pointer-events: none;
}

.carousel-btn {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-normal);
    pointer-events: auto;
    box-shadow: var(--shadow-lg);
}

.carousel-btn:hover {
    background: var(--white);
    transform: scale(1.1);
}

.carousel-btn i {
    font-size: 1.25rem;
    color: var(--gray-700);
}

.carousel-indicators {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition-normal);
}

.indicator.active {
    background: var(--white);
    transform: scale(1.2);
}

/* ==================== 技术优势 ==================== */
.advantages {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
}

.comparison-table {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.comparison-header {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    background: var(--gray-900);
    color: var(--white);
}

.comparison-item {
    padding: var(--spacing-lg);
    font-weight: 600;
    text-align: center;
}

.comparison-item.highlight {
    background: var(--primary-color);
}

.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    border-bottom: 1px solid var(--gray-200);
}

.comparison-row:last-child {
    border-bottom: none;
}

.comparison-row .comparison-item {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 500;
}

.comparison-row .comparison-item.highlight {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.comparison-row .comparison-item i.fa-check {
    color: var(--primary-color);
}

.comparison-row .comparison-item i.fa-times {
    color: #EF4444;
}

.comparison-row .comparison-item i.fa-minus {
    color: var(--gray-400);
}

/* ==================== 目标客户 ==================== */
.target-customers {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.customers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.customer-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

.customer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

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

.customer-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.customer-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.customer-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.customer-scale {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.customer-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.customer-benefits {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.customer-benefits li {
    padding: var(--spacing-xs) 0;
    color: var(--gray-700);
    position: relative;
    padding-left: var(--spacing-lg);
}

.customer-benefits li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.customer-roi {
    background: var(--primary-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.roi-label {
    color: var(--gray-700);
    font-size: 0.875rem;
}

.roi-value {
    color: var(--primary-dark);
    font-weight: 700;
    font-size: 1.1rem;
}

/* ==================== 定制开发服务 ==================== */
.custom-development {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 50%, var(--secondary-light) 100%);
    position: relative;
    overflow: hidden;
}

.custom-development::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid2" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e5e7eb" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid2)"/></svg>');
    opacity: 0.3;
}

.custom-dev-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* 定制开发服务头部 */
.custom-dev-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    position: relative;
    z-index: 1;
}

.custom-dev-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
}

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

.custom-dev-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
}

.custom-dev-subtitle {
    font-size: 1.2rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* 主要内容区域 */
.custom-dev-main {
    position: relative;
    z-index: 1;
}

/* 服务卡片网格 */
.custom-dev-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.service-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    transition: var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.tech-services {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(147, 51, 234, 0.05) 100%);
}

.support-services {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(101, 163, 13, 0.05) 100%);
}

.service-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.tech-services .service-icon {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.support-services .service-icon {
    background: linear-gradient(135deg, #10b981 0%, #65a30d 100%);
}

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

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

.service-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.service-item:hover {
    background: rgba(255, 255, 255, 0.5);
}

.service-item i {
    width: 20px;
    color: var(--primary-color);
    font-size: 1rem;
}

.service-item span {
    color: var(--gray-700);
    font-weight: 500;
}

/* 统计数据 */
.custom-dev-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
    padding: var(--spacing-2xl);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-align: left;
}

.stat-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin-top: 2px;
}

/* 行动按钮 */
.custom-dev-cta {
    text-align: center;
    position: relative;
    z-index: 1;
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-3xl);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.cta-note {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin: 0;
}

/* 响应式设计 - 苹果风格 */
@media (max-width: 768px) {
    .apple-section-header {
        padding: 80px 20px 60px;
    }
    
    .apple-title {
        font-size: 2.5rem;
        margin-bottom: 20px;
    }
    
    .apple-subtitle {
        font-size: 1.25rem;
        margin-bottom: 24px;
    }
    
    .apple-description {
        font-size: 1.1rem;
        padding: 0 20px;
    }
    
    .apple-feature-section {
        padding: 60px 0;
    }
    
    .apple-feature-content {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 20px;
    }
    
    .apple-feature-content.reverse .apple-feature-text,
    .apple-feature-content.reverse .apple-feature-visual {
        order: unset;
    }
    
    .apple-feature-title {
        font-size: 2rem;
        margin-bottom: 16px;
    }
    
    .highlight-number {
        font-size: 2rem;
        margin-right: 4px;
    }
    
    .apple-feature-subtitle {
        font-size: 1.25rem;
        margin-bottom: 30px;
    }
    
    .apple-feature-point {
        font-size: 1rem;
    }
    
    .apple-device-mockup {
        width: 280px;
        height: 560px;
        padding: 16px;
    }
    
    .apple-device-mockup::before {
        width: 50px;
        height: 5px;
        top: 12px;
    }
    
    .apple-screen {
        border-radius: 25px;
        padding: 30px 16px;
    }
    
    .apple-app-icon {
        font-size: 3rem;
        margin-bottom: 20px;
    }
    
    .apple-chat-bubble {
        padding: 12px 16px;
        font-size: 0.8rem;
        max-width: 160px;
    }
    
    .apple-metric-value {
        font-size: 2rem;
    }
    
    .apple-account-grid {
        width: 100px;
        gap: 8px;
    }
    
    .apple-account-item {
        width: 40px;
        height: 40px;
    }
}

/* 响应式设计 - 定制开发 */
@media (max-width: 768px) {
    .custom-dev-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .custom-dev-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .custom-dev-card {
        padding: var(--spacing-xl);
    }
    
    .custom-dev-title {
        font-size: 1.75rem;
    }
}

/* ==================== 移动端响应式设计 ==================== */

/* 产品介绍 - 移动端优化 */
@media (max-width: 1024px) {
    .apple-section-header {
        padding: 80px 40px 60px;
    }
    
    .apple-title {
        font-size: 3.5rem;
    }
    
    .apple-subtitle {
        font-size: 1.5rem;
    }
    
    .apple-feature-content {
        gap: 50px;
        padding: 0 40px;
    }
}

@media (max-width: 768px) {
    /* 产品介绍标题区域 */
    .product-intro.apple-style {
        overflow-x: hidden;
    }
    
    .apple-section-header {
        padding: 50px 20px 40px;
        text-align: center;
    }
    
    .apple-title {
        font-size: 2.8rem;
        line-height: 1.1;
        margin-bottom: 20px;
        letter-spacing: -0.02em;
    }
    
    .apple-subtitle {
        font-size: 1.3rem;
        line-height: 1.3;
        margin-bottom: 24px;
        font-weight: 500;
    }
    
    .apple-description {
        font-size: 1.1rem;
        line-height: 1.5;
        max-width: 90%;
        margin: 0 auto;
    }
    
    /* 特性展示区域 */
    .apple-feature-section {
        padding: 50px 0;
    }
    
    .apple-feature-content {
        display: block;
        padding: 0 20px;
        max-width: 100%;
    }
    
    .apple-feature-text {
        text-align: center;
        margin-bottom: 40px;
    }
    
    .apple-feature-title {
        font-size: 2rem;
        line-height: 1.2;
        margin-bottom: 20px;
        font-weight: 600;
    }
    
    .apple-feature-description {
        font-size: 1.1rem;
        line-height: 1.6;
        color: var(--gray-600);
        max-width: 100%;
        margin: 0 auto;
    }
    
    .apple-feature-visual {
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    /* 设备模拟器优化 */
    .apple-device-mockup {
        max-width: 320px;
        width: 100%;
        margin: 0 auto;
        transform: scale(0.9);
    }
    
    .apple-phone-frame {
        width: 320px;
        height: 640px;
        border-radius: 40px;
        background: linear-gradient(145deg, #1a1a1a, #2d2d2d);
        box-shadow: 
            0 0 0 8px #000,
            0 20px 60px rgba(0, 0, 0, 0.4),
            inset 0 2px 4px rgba(255, 255, 255, 0.1);
        position: relative;
        overflow: hidden;
    }
    
    .apple-phone-screen {
        width: 288px;
        height: 608px;
        top: 16px;
        left: 16px;
        border-radius: 32px;
        background: var(--white);
        overflow: hidden;
        position: absolute;
    }
    
    /* 聊天界面优化 */
    .apple-chat-interface {
        padding: 20px 16px;
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    
    .apple-chat-header {
        padding: 12px 0;
        border-bottom: 1px solid var(--gray-200);
        margin-bottom: 20px;
        text-align: center;
    }
    
    .apple-chat-header h4 {
        font-size: 1rem;
        font-weight: 600;
        color: var(--gray-900);
        margin: 0;
    }
    
    .apple-chat-messages {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 12px;
        max-height: 400px;
        overflow-y: auto;
        padding-right: 4px;
    }
    
    .apple-message {
        padding: 12px 16px;
        border-radius: 18px;
        font-size: 0.9rem;
        line-height: 1.4;
        max-width: 80%;
        word-wrap: break-word;
    }
    
    .apple-message.user {
        background: var(--primary-color);
        color: var(--white);
        align-self: flex-end;
        margin-left: auto;
    }
    
    .apple-message.bot {
        background: var(--gray-100);
        color: var(--gray-900);
        align-self: flex-start;
    }
    
    .apple-input-area {
        padding: 16px 0 0;
        display: flex;
        gap: 12px;
        align-items: center;
        border-top: 1px solid var(--gray-200);
    }
    
    .apple-input-area input {
        flex: 1;
        padding: 12px 16px;
        border: 1px solid var(--gray-300);
        border-radius: 20px;
        font-size: 0.9rem;
        outline: none;
        background: var(--gray-50);
    }
    
    .apple-input-area input:focus {
        border-color: var(--primary-color);
        background: var(--white);
    }
    
    .apple-input-area button {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: var(--primary-color);
        color: var(--white);
        border: none;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
        cursor: pointer;
        transition: all 0.2s ease;
    }
    
    .apple-input-area button:hover {
        background: var(--primary-dark);
        transform: scale(1.05);
    }
}

@media (max-width: 480px) {
    .apple-section-header {
        padding: 40px 16px 30px;
    }
    
    .apple-title {
        font-size: 2.2rem;
        margin-bottom: 16px;
    }
    
    .apple-subtitle {
        font-size: 1.1rem;
        margin-bottom: 20px;
    }
    
    .apple-description {
        font-size: 1rem;
        max-width: 95%;
    }
    
    .apple-feature-section {
        padding: 40px 0;
    }
    
    .apple-feature-content {
        padding: 0 16px;
    }
    
    .apple-feature-text {
        margin-bottom: 30px;
    }
    
    .apple-feature-title {
        font-size: 1.7rem;
        margin-bottom: 16px;
    }
    
    .apple-feature-description {
        font-size: 1rem;
    }
    
    .apple-device-mockup {
        max-width: 280px;
        transform: scale(0.85);
    }
    
    .apple-phone-frame {
        width: 280px;
        height: 560px;
        border-radius: 35px;
    }
    
    .apple-phone-screen {
        width: 252px;
        height: 532px;
        top: 14px;
        left: 14px;
        border-radius: 28px;
    }
    
    .apple-chat-interface {
        padding: 16px 12px;
    }
    
    .apple-chat-messages {
        max-height: 320px;
        gap: 10px;
    }
    
    .apple-message {
        padding: 10px 14px;
        font-size: 0.85rem;
        border-radius: 16px;
    }
    
    .apple-input-area input {
        padding: 10px 14px;
        font-size: 0.85rem;
    }
    
    .apple-input-area button {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
}

/* 技术优势对比 - 移动端优化 */
@media (max-width: 1024px) {
    .advantages {
        padding: 80px 0;
    }
    
    .advantages .section-header {
        padding: 0 40px;
        margin-bottom: 50px;
    }
    
    .comparison-table {
        margin: 0 40px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        border-radius: 16px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    }
}

@media (max-width: 768px) {
    .advantages {
        padding: 60px 0;
        background: var(--gray-50);
    }
    
    .advantages .section-header {
        padding: 0 20px;
        margin-bottom: 40px;
        text-align: center;
    }
    
    .advantages .section-title {
        font-size: 2.2rem;
        line-height: 1.2;
        margin-bottom: 16px;
        font-weight: 700;
        color: var(--gray-900);
    }
    
    .advantages .section-subtitle {
        font-size: 1.1rem;
        line-height: 1.5;
        color: var(--gray-600);
        max-width: 90%;
        margin: 0 auto;
    }
    
    /* 卡片式对比布局 */
    .comparison-table {
        display: block;
        margin: 0 20px;
        background: transparent;
        border: none;
        box-shadow: none;
    }
    
    .comparison-header {
        display: none;
    }
    
    .comparison-row {
        display: block;
        background: var(--white);
        border-radius: 16px;
        margin-bottom: 20px;
        padding: 24px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        border: 1px solid var(--gray-100);
        transition: all 0.3s ease;
    }
    
    .comparison-row:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    }
    
    .comparison-row .comparison-item {
        display: block;
        padding: 0;
        margin: 0;
        text-align: left;
        white-space: normal;
        border: none;
        background: none;
        min-width: auto;
        flex: none;
    }
    
    .comparison-row .comparison-item:first-child {
        font-size: 1.3rem;
        font-weight: 700;
        color: var(--gray-900);
        margin-bottom: 20px;
        padding-bottom: 16px;
        border-bottom: 3px solid var(--primary-color);
        text-align: center;
        background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    
    .comparison-row .comparison-item:not(:first-child) {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 0;
        border-bottom: 1px solid var(--gray-100);
        font-size: 0.95rem;
        line-height: 1.4;
    }
    
    .comparison-row .comparison-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    
    .comparison-row .comparison-item:not(:first-child)::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--gray-700);
        flex: 1;
        margin-right: 16px;
    }
    
    .comparison-row .comparison-item:not(:first-child) .comparison-content {
        flex: 1;
        text-align: right;
        display: flex;
        align-items: center;
        justify-content: flex-end;
        gap: 8px;
    }
    
    .comparison-row .comparison-item.highlight {
        background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
        color: var(--white);
        border-radius: 12px;
        padding: 16px;
        margin: 8px 0;
        font-weight: 600;
        box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
        border: none;
    }
    
    .comparison-row .comparison-item.highlight::before {
        color: var(--white);
        opacity: 0.9;
    }
    
    .comparison-row .comparison-item.highlight .comparison-content {
        color: var(--white);
    }
    
    .comparison-row .comparison-item i {
        font-size: 1.1rem;
        margin-right: 8px;
        width: 20px;
        text-align: center;
    }
    
    .comparison-row .comparison-item i.fa-check {
        color: var(--success-color);
    }
    
    .comparison-row .comparison-item i.fa-times {
        color: var(--error-color);
    }
    
    .comparison-row .comparison-item i.fa-minus {
        color: var(--warning-color);
    }
    
    .comparison-row .comparison-item.highlight i {
        color: var(--white);
    }
}

@media (max-width: 480px) {
    .advantages {
        padding: 50px 0;
    }
    
    .advantages .section-header {
        padding: 0 16px;
        margin-bottom: 30px;
    }
    
    .advantages .section-title {
        font-size: 1.9rem;
        margin-bottom: 12px;
    }
    
    .advantages .section-subtitle {
        font-size: 1rem;
        max-width: 95%;
    }
    
    .comparison-table {
        margin: 0 16px;
    }
    
    .comparison-row {
        padding: 20px;
        margin-bottom: 16px;
        border-radius: 12px;
    }
    
    .comparison-row .comparison-item:first-child {
        font-size: 1.2rem;
        margin-bottom: 16px;
        padding-bottom: 12px;
    }
    
    .comparison-row .comparison-item:not(:first-child) {
        padding: 10px 0;
        font-size: 0.9rem;
    }
    
    .comparison-row .comparison-item:not(:first-child)::before {
        font-size: 0.85rem;
        margin-right: 12px;
    }
    
    .comparison-row .comparison-item.highlight {
        padding: 14px;
        margin: 6px 0;
        border-radius: 10px;
    }
    
    .comparison-row .comparison-item i {
        font-size: 1rem;
        margin-right: 6px;
        width: 18px;
    }
}

/* ==================== 联系我们 ==================== */
.contact {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--secondary-color) 100%);
    color: var(--white);
}

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

.contact-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.contact-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.7;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.method-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.method-icon i {
    font-size: 1.25rem;
    color: var(--white);
}

.method-info h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.method-info p {
    opacity: 0.8;
}

/* WhatsApp 链接样式 */
.whatsapp-link {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-normal);
    position: relative;
    display: inline-block;
}

.whatsapp-link:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
}

.whatsapp-link:before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-normal);
}

.whatsapp-link:hover:before {
    width: 100%;
}

/* 联系我们部分的 WhatsApp 链接 */
.contact .whatsapp-link {
    color: var(--white);
    font-weight: 500;
}

.contact .whatsapp-link:hover {
    color: var(--primary-color);
}

/* 页脚的 WhatsApp 链接 */
.footer .whatsapp-link {
    color: var(--gray-300);
    font-weight: 400;
}

.footer .whatsapp-link:hover {
    color: var(--primary-color);
}



/* ==================== 页脚 ==================== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.footer-logo i {
    font-size: 1.5rem;
}

.footer-description {
    opacity: 0.8;
    line-height: 1.7;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition-fast);
}

.footer-section ul li a:hover {
    opacity: 1;
    color: var(--primary-color);
}

.footer-section ul li i {
    margin-right: var(--spacing-sm);
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--spacing-lg);
    text-align: center;
    opacity: 0.6;
}

/* 备案号链接样式 */
.beian-link {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

.beian-link:hover {
    color: var(--primary-color);
    opacity: 1;
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-10px);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.7rem;
    }
    
    .contact-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
    
    .comparison-table {
        overflow-x: auto;
    }
    
    .custom-dev-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .custom-dev-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
        align-items: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        justify-content: start;
        align-items: center;
        padding-top: var(--spacing-xl);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .customers-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-header,
    .comparison-row {
        grid-template-columns: 1fr;
    }
    
    .comparison-item {
        text-align: left;
        border-bottom: 1px solid var(--gray-200);
    }
    
    .custom-dev-title {
        font-size: 2rem;
    }
    
    .custom-dev-subtitle {
        font-size: 1rem;
    }
    
    .custom-dev-icon {
        width: 80px;
        height: 80px;
    }
    
    .custom-dev-icon i {
        font-size: 2rem;
    }
    
    /* 产品介绍移动端优化 */
    .product-feature-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .feature-number {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .feature-content h3 {
        font-size: 1.25rem;
    }
    
    .feature-highlights {
        justify-content: center;
    }
    
    /* 产品介绍区域移动端优化 */
    .product-intro {
        padding: 80px 0 60px;
    }
    
    .section-title {
        font-size: 2.2rem;
        margin-bottom: 15px;
    }
    
    .section-subtitle {
        font-size: 1.1rem;
        margin-bottom: 30px;
        max-width: 90%;
    }
    
    /* 全屏产品展示移动端优化 */
    .product-showcase-fullwidth {
        padding: 40px 0;
    }
    
    .product-showcase-fullwidth .section-title {
        font-size: 2rem;
        margin-bottom: 15px;
    }
    
    .product-showcase-fullwidth .section-subtitle {
        font-size: 1rem;
        margin-bottom: 30px;
    }
    
    .horizontal-tabs-container {
        padding: 0 15px;
    }
    
    .horizontal-tabs-nav {
        flex-direction: row;
        overflow-x: auto;
        justify-content: flex-start;
        gap: 15px;
        padding-bottom: 10px;
        scrollbar-width: none;
        -ms-overflow-style: none;
        margin-bottom: 30px;
    }
    
    .horizontal-tabs-nav::-webkit-scrollbar {
        display: none;
    }
    
    .tab-item {
        flex: 0 0 200px;
        min-width: 200px;
        max-width: 200px;
        padding: 18px 22px;
        border-radius: 16px;
        backdrop-filter: blur(20px);
    }
    
    .tab-item:hover {
        transform: translateY(-4px) scale(1.01);
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
    }
    
    .tab-item.active {
        transform: translateY(-6px) scale(1.02);
        box-shadow: 0 20px 45px rgba(0, 0, 0, 0.15);
    }
    
    .tab-number {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
        margin-bottom: 10px;
    }
    
    .tab-content h3 {
        font-size: 1rem;
        margin-bottom: 4px;
    }
    
    .tab-content p {
        font-size: 0.8rem;
    }
    
    .fullscreen-image-container {
        height: 50vh;
        min-height: 400px;
        border-radius: 15px;
    }
    
    .screenshot-fullscreen i {
        font-size: 4rem;
        margin-bottom: 30px;
    }
    
    .image-overlay {
        padding: 30px 20px;
        background: linear-gradient(to top, rgba(0, 0, 0, 0.98), rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.4));
    }
    
    .image-overlay h2 {
        font-size: 1.8rem;
        margin-bottom: 15px;
        text-shadow: 0 4px 20px rgba(0, 0, 0, 0.9);
        color: #FFFFFF;
    }
    
    .feature-tags {
        gap: 8px;
        margin-bottom: 20px;
    }
    
    .tag {
        font-size: 0.8rem;
        padding: 8px 14px;
        font-weight: 600;
        text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    }
    
    .feature-description h4 {
        font-size: 1.1rem;
        margin-bottom: 15px;
        color: #FFFFFF;
        text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
    }
    
    .feature-description ul {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .feature-description li {
        font-size: 0.9rem;
        padding-left: 22px;
        text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
        color: #FFFFFF;
    }
    
    .feature-description li::before {
        font-size: 1rem;
        width: 16px;
        height: 16px;
    }
    
    /* 截图轮播移动端优化 */
    /* 产品展示移动端优化 - WhatsApp风格 */
    .product-showcase {
        flex-direction: column;
        gap: 30px;
        margin-top: 40px;
        padding: 40px 20px;
    }
    
    .features-sidebar {
        max-width: 100%;
        padding: 0;
    }
    
    .accordion-item {
        margin-bottom: 15px;
    }
    
    .accordion-header {
        padding: 20px;
        gap: 15px;
    }
    
    .accordion-header:hover {
        background: none;
    }
    
    .features-sidebar .feature-number {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
    
    .feature-title h3 {
        font-size: 16px;
        margin-bottom: 8px;
    }
    
    .features-sidebar .feature-highlights {
        gap: 6px;
    }
    
    .features-sidebar .highlight {
        font-size: 11px;
        padding: 3px 10px;
    }
    
    .accordion-toggle {
        font-size: 14px;
    }
    
    .accordion-content {
        padding: 0 20px 20px 70px;
        max-height: 250px;
    }
    
    .accordion-content p {
        font-size: 13px;
        margin-bottom: 12px;
    }
    
    .feature-details li {
        font-size: 12px;
        padding: 3px 0;
    }
    
    .screenshot-display {
        max-width: 100%;
        padding: 0;
    }
    
    .screenshot-container {
        height: 300px;
        border-radius: 15px;
    }
    
    .product-showcase .screenshot-placeholder {
        padding: 40px 20px;
        border-radius: 15px;
    }
    
    .screenshot-content i {
        font-size: 50px;
        margin-bottom: 20px;
    }
    
    .screenshot-content h3 {
        font-size: 20px;
        margin-bottom: 15px;
    }
    
    .screenshot-content p {
        font-size: 14px;
    }
    
    .screenshot-note {
        font-size: 12px;
        padding: 10px 18px;
        bottom: 20px;
    }
    
    .screenshot-indicators {
        margin-top: 25px;
        gap: 10px;
    }
    
    .screenshot-indicators .indicator {
        width: 12px;
        height: 12px;
    }
    
    .screenshot-indicators .indicator.active::after {
        width: 4px;
        height: 4px;
    }
    
    .screenshot-placeholder i {
        font-size: 3rem;
    }
    
    .screenshot-placeholder h3 {
        font-size: 1.5rem;
    }
    
    .screenshot-placeholder p {
        font-size: 1rem;
    }
    
    .carousel-controls {
        padding: 0 var(--spacing-sm);
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
    }
    
    .carousel-btn i {
        font-size: 1rem;
    }
    
    .comparison-item:last-child {
        border-bottom: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .feature-card,
    .customer-card {
        padding: var(--spacing-lg);
    }
    

    
    /* 超小屏幕文字优化 */
    .fullscreen-image-container {
        height: 45vh;
        min-height: 350px;
    }
    
    .screenshot-fullscreen i {
        font-size: 3.5rem;
        margin-bottom: 25px;
    }
    
    .image-overlay {
        padding: 25px 15px;
        background: linear-gradient(to top, rgba(0, 0, 0, 0.99), rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.5));
    }
    
    .image-overlay h2 {
        font-size: 1.5rem;
        margin-bottom: 12px;
        text-shadow: 0 5px 25px rgba(0, 0, 0, 1);
    }
    
    .feature-tags {
        gap: 6px;
        margin-bottom: 18px;
    }
    
    .tag {
        font-size: 0.75rem;
        padding: 6px 12px;
        font-weight: 700;
    }
    
    .feature-description h4 {
        font-size: 1rem;
        margin-bottom: 12px;
        text-shadow: 0 3px 12px rgba(0, 0, 0, 0.8);
    }
    
    .feature-description li {
        font-size: 0.85rem;
        padding-left: 20px;
        margin-bottom: 6px;
        text-shadow: 0 3px 12px rgba(0, 0, 0, 0.8);
    }
    
    .feature-description li::before {
        width: 14px;
        height: 14px;
        font-size: 0.9rem;
    }
}

/* ==================== 工具类 ==================== */
.text-center {
    text-align: center;
}

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

.text-right {
    text-align: right;
}

.hidden {
    display: none;
}

.visible {
    display: block;
}

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

.slide-in-right {
    animation: fadeInRight 0.6s ease-out;
}