/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #4caf50;
    --text-dark: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e9ecef;
    --shadow-light: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 20px rgba(0,0,0,0.15);
    --shadow-heavy: 0 10px 30px rgba(0,0,0,0.2);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 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(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

.nav-link:hover,
.nav-link.active {
    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);
}

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* 主横幅 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.highlight {
    color: #ffd700;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.hero-image {
    text-align: center;
}

.hero-img {
    max-width: 100%;
    height: auto;
}

/* 产品部分 */
.products-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.product-card {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.product-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.product-icon i {
    font-size: 24px;
    color: white;
}

.product-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.product-desc {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 25px;
}

.feature-tag {
    background: var(--bg-light);
    color: var(--text-light);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.product-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.product-link:hover {
    color: var(--secondary-color);
}

/* 技术优势 */
.advantages-section {
    padding: 100px 0;
    background: white;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.advantage-item {
    text-align: center;
    padding: 30px 20px;
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.advantage-icon i {
    font-size: 32px;
    color: white;
}

.advantage-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

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

/* 开发者平台预览 */
.developer-preview {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.developer-text h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.developer-text p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 30px;
}

.developer-features {
    list-style: none;
    margin-bottom: 40px;
}

.developer-features li {
    color: var(--text-light);
    padding: 8px 0;
    position: relative;
    padding-left: 25px;
}

.developer-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.code-preview {
    background: #1e1e1e;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-medium);
}

.code-header {
    background: #2d2d2d;
    padding: 15px 20px;
    border-bottom: 1px solid #404040;
}

.code-title {
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 500;
}

.code-content {
    padding: 20px;
}

.code-content pre {
    margin: 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.code-content code {
    color: #f8f8f2;
}

/* 统计数据 */
.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 页脚 */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo-img {
    height: 35px;
    width: auto;
}

.footer-logo-text {
    font-size: 1.3rem;
    font-weight: 600;
}

.footer-desc {
    color: #cccccc;
    line-height: 1.6;
    margin-bottom: 25px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: #333333;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #cccccc;
    text-decoration: none;
    transition: var(--transition);
}

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

.contact-info p {
    color: #cccccc;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info i {
    width: 16px;
}

.footer-bottom {
    border-top: 1px solid #333333;
    padding-top: 20px;
    text-align: center;
}

.footer-copyright {
    color: #999999;
}

.footer-copyright a {
    color: #cccccc;
    text-decoration: none;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .developer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

/* 图标字体 (使用字符替代) */
.icon-store::before { content: '🏪'; }
.icon-mobile::before { content: '📱'; }
.icon-security::before { content: '🔒'; }
.icon-payment::before { content: '💳'; }
.icon-analytics::before { content: '📊'; }
.icon-target::before { content: '🎯'; }
.icon-wechat::before { content: '💬'; }
.icon-weibo::before { content: '📢'; }
.icon-qq::before { content: '🐧'; }
.icon-phone::before { content: '📞'; }
.icon-email::before { content: '✉️'; }
.icon-location::before { content: '📍'; }

/* APP图标样式 */
.app-icon {
    background: transparent !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-icon-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
}


/* APP下载推广区域 */
.app-download-promo {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

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

.promo-text h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
}

.promo-text p {
    font-size: 20px;
    margin-bottom: 32px;
    opacity: 0.9;
}

.promo-features {
    list-style: none;
    padding: 0;
    margin-bottom: 32px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.promo-features li {
    font-size: 16px;
    padding: 8px 0;
}

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

.phone-preview {
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 20px;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.phone-preview img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 16px;
}

@media (max-width: 768px) {
    .promo-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .promo-text h2 {
        font-size: 32px;
    }
    
    .promo-text p {
        font-size: 16px;
    }
    
    .promo-features {
        grid-template-columns: 1fr;
    }
    
    .promo-image {
        margin-top: 32px;
    }
}