/* 全局重置与基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 0;
}

.section {
    padding: 3rem 0;
}

/* 头部导航 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 999;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #2c3e50;
}

nav ul {
    display: flex;
    list-style: none;
}

    nav ul li {
        margin-left: 2rem;
    }

        nav ul li a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: color 0.3s;
        }

            nav ul li a:hover {
                color: #e74c3c;
            }

/* Banner 区域 */
.banner {
    height: 70vh;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url("assets/banner.jpg");
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
}

.banner-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

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

/* 关于我们 */
#about {
    background-color: #f9f9f9;
}

    #about h2, #services h2, #cases h2, #contact h2 {
        text-align: center;
        margin-bottom: 2rem;
        font-size: 2rem;
        color: #2c3e50;
    }

.team {
    margin-top: 2rem;
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* 服务项目 */
.service-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.card {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

    .card h3 {
        margin-bottom: 1rem;
        color: #e74c3c;
    }

/* 成功案例 */
.case-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.case-item {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

    .case-item h3 {
        margin-bottom: 1rem;
        color: #2980b9;
    }

/* 联系我们 */
#contact {
    background-color: #f9f9f9;
}

form {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

input, textarea, button {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    background-color: #e74c3c;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

    button:hover {
        background-color: #c0392b;
    }

.contact-info {
    text-align: center;
    margin-top: 2rem;
}

/* 页脚 */
footer {
    background-color: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 1.5rem 0;
}