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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 头部导航 */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: #2ecc71;
}

.logo i {
    margin-right: 10px;
    font-size: 28px;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav a:hover,
.nav a.active {
    color: #2ecc71;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2ecc71;
    transition: width 0.3s;
}

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

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content .tagline {
    font-size: 24px;
    margin-bottom: 15px;
    opacity: 0.9;
}

.hero-content .subtitle {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.8;
}

.cta-button {
    background: white;
    color: #2ecc71;
    border: none;
    padding: 15px 40px;
    font-size: 18px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

/* 关于我们区域 */
.about {
    padding: 80px 0;
    background: #f8f9fa;
}

.about h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #2ecc71;
}

.timeline {
    max-width: 800px;
    margin: 0 auto 50px;
}

.timeline-item {
    display: flex;
    margin-bottom: 30px;
    align-items: flex-start;
}

.year {
    background: #2ecc71;
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
    margin-right: 30px;
    min-width: 100px;
    text-align: center;
}

.content {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    flex: 1;
}

.about-image {
    text-align: center;
    margin-top: 50px;
}

.about-image img {
    max-width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* 服务体系 */
.services {
    padding: 80px 0;
    background: white;
}

.services h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #2ecc71;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card i {
    font-size: 48px;
    color: #2ecc71;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.service-card p {
    color: #666;
    margin-bottom: 25px;
}

.service-btn {
    background: #2ecc71;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}

.service-btn:hover {
    background: #27ae60;
}

/* 营养社区 */
.community {
    padding: 80px 0;
    background: #f8f9fa;
}

.community h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #2ecc71;
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.community-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.community-item:hover {
    transform: translateY(-5px);
}

.community-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.community-content {
    padding: 20px;
}

.community-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.community-content p {
    color: #666;
    font-size: 14px;
}

/* 浮动菜单 */
.floating-menu {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.floating-item {
    background: white;
    padding: 15px;
    border-radius: 50px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #333;
}

.floating-item:hover {
    transform: scale(1.1);
}

.floating-item.primary {
    background: #2ecc71;
    color: white;
}

.floating-item i {
    font-size: 18px;
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 80px;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.footer-section {
    flex: 1;
    max-width: 300px;
}

.footer-section h3 {
    margin-bottom: 25px;
    color: #2ecc71;
    text-align: left;
    font-size: 20px;
    font-weight: 600;
}

.footer-section p {
    margin-bottom: 10px;
    opacity: 0.8;
}

.footer-section i {
    margin-right: 10px;
    color: #2ecc71;
}

.qr-codes {
    display: flex;
    gap: 20px;
}

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

.qr-code p {
    margin-top: 10px;
    font-size: 14px;
    opacity: 0.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    opacity: 0.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav {
        gap: 15px;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-content .tagline {
        font-size: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        text-align: center;
    }
    
    .year {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .service-grid,
    .community-grid {
        grid-template-columns: 1fr;
    }
    
    .floating-menu {
        right: 10px;
    }
    
    .floating-item span {
        display: none;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }
    
    .footer-section {
        max-width: none;
    }
    
    .qr-codes {
        justify-content: center;
    }
}

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

.service-card,
.community-item {
    animation: fadeInUp 0.6s ease-out;
}