/* 全局样式 */
:root {
    --primary-color: #222222;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --text-color: #333333;
    --light-text: #666666;
    --background-color: #ffffff;
    --light-background: #f8f9fa;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--background-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: var(--accent-color);
}

/* 头部样式 */
header {
    padding: 20px 0;
    box-shadow: var(--shadow);
    background-color: var(--background-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
}

h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

/* 英雄区域 */
.hero {
    padding: 60px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    flex: 1;
    padding-right: 40px;
}

.hero h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.slogan {
    font-size: 18px;
    color: var(--light-text);
    margin-bottom: 30px;
    line-height: 1.5;
}

.cta {
    display: flex;
    align-items: center;
}

.qrcode-container {
    text-align: center;
}

.qrcode {
    width: 150px;
    height: 150px;
    margin-bottom: 10px;
    border: 5px solid white;
    box-shadow: var(--shadow);
}

.qrcode-container p {
    font-size: 14px;
    color: var(--light-text);
}

.mockup-container {
    flex: 1;
    text-align: center;
}

.mockup {
    max-width: 60%;
    height: auto;
    box-shadow: var(--shadow);
    border-radius: 20px;
}

/* 特性区域 */
.features {
    padding: 60px 0;
    background-color: var(--light-background);
}

.features h2 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.express-companies {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
}

.express-company {
    background-color: white;
    padding: 15px;
    text-align: center;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s, transform 0.5s;
}

.express-company.visible {
    opacity: 1;
    transform: translateY(0);
}

.express-company:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 优势区域 */
.advantages {
    padding: 60px 0;
}

.advantages h2 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.advantage-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.advantage-card {
    background-color: white;
    padding: 30px;
    text-align: center;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s, transform 0.5s;
}

.advantage-card.visible {
    opacity: 1;
    transform: translateY(0);
}

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

.icon {
    font-size: 36px;
    margin-bottom: 15px;
}

.advantage-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.advantage-card p {
    color: var(--light-text);
}

/* 页脚样式 */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

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

.logo-small {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    margin-right: 10px;
}

.footer-links p {
    margin-bottom: 10px;
    font-size: 14px;
}

.footer-links a {
    color: #ffffff;
}

.footer-links a:hover {
    text-decoration: underline;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.5s ease-out forwards;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 40px;
        text-align: center;
    }
    
    .cta {
        justify-content: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-logo {
        margin-bottom: 20px;
        justify-content: center;
    }
    
    .advantage-cards {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 20px;
    }
    
    .hero h2 {
        font-size: 28px;
    }
}