/* 基础样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
    background-color: #f4f7f6;
}

/* 导航栏 */
header {
    background-color: #ffffff;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.company-logo {
    height: 50px;
    margin-right: 15px;
}

header h1 {
    font-size: 1.5rem;
    color: #004d40;
    margin: 0;
}

header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

header nav ul li {
    margin-left: 25px;
}

header nav ul li a {
    text-decoration: none;
    color: #555;
    font-weight: bold;
    transition: color 0.3s;
}

header nav ul li a:hover {
    color: #00796b;
}

/* 主体内容 */
main {
    padding: 2rem 5%;
}

section {
    background-color: #ffffff;
    padding: 3rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

section h2 {
    text-align: center;
    color: #004d40;
    font-size: 2rem;
    margin-bottom: 2rem;
    position: relative;
}

section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: #00796b;
    margin: 10px auto 0;
}

/* 英雄区 */
#hero {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://imgbed.captainzeqi.com/file/1758247154092_仓储1.png') no-repeat center center/cover;
    height: 60vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    border-radius: 8px;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #fff;
}

.hero-content h2::after {
    display: none;
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-button {
    background-color: #00796b;
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: background-color 0.3s, transform 0.3s;
}

.cta-button:hover {
    background-color: #004d40;
    transform: translateY(-2px);
}

/* 关于我们 */
#about .about-content {
    text-align: center;
}

/* 解决方案流程图 */
#solution {
    text-align: center;
}

.flowchart-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 2rem;
}

.flow-step {
    flex: 1 1 200px;
    background-color: #e8f5e9;
    padding: 20px;
    border-radius: 8px;
    border: 2px solid #00796b;
    position: relative;
    transition: transform 0.3s;
}

.flow-step:hover {
    transform: translateY(-5px);
}

.step-number {
    width: 30px;
    height: 30px;
    line-height: 30px;
    background-color: #004d40;
    color: #fff;
    border-radius: 50%;
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    font-weight: bold;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.flow-step h3 {
    margin-top: 10px;
    color: #004d40;
}

.flow-step p {
    font-size: 0.9rem;
    color: #555;
}

/* 业务范围 */
.services-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.service-item {
    background-color: #f7f7f7;
    padding: 2rem;
    border-radius: 8px;
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.service-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.service-item h3 {
    color: #00796b;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* 联系信息 */
#contact .contact-info {
    text-align: center;
    font-size: 1.1rem;
}

.contact-info p {
    margin: 10px 0;
}

/* 底部 */
footer {
    text-align: center;
    padding: 1.5rem;
    background-color: #004d40;
    color: #e0f2f1;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
    }
    nav ul {
        flex-direction: column;
        margin-top: 15px;
    }
    nav ul li {
        margin: 10px 0;
    }
    .hero-content h2 {
        font-size: 2rem;
    }
    .hero-content p {
        font-size: 1rem;
    }
    section {
        padding: 2rem;
    }
    .flowchart-container {
        flex-direction: column;
        align-items: center;
    }
    .flow-step {
        width: 100%;
    }
    .services-container {
        grid-template-columns: 1fr;
    }
}