/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 设置页面背景色和基本字体 */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
}

/* 顶部导航栏 */
header {
    background-color: #333;
    color: white;
    padding: 10px 0;
}

nav ul {
    list-style: none;
    text-align: center;
}

nav ul li {
    display: inline-block;
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
}

nav ul li a:hover {
    text-decoration: underline;
}

/* 搜索框样式 */
.search-container {
    text-align: center;
    margin: 30px 0;
}

.search-container input {
    padding: 10px;
    width: 80%;
    max-width: 400px;
    font-size: 16px;
    border: 2px solid #ccc;
    border-radius: 5px;
    margin-right: 10px;
}

.search-container button {
    padding: 10px 15px;
    font-size: 16px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
}

.search-container button:hover {
    background-color: #0056b3;
}

/* 企业列表样式 */
.company-list {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.category {
    margin-bottom: 30px;
}

.category h2 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #333;
}

.companies {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.company {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.company a {
    color: #007bff;
    text-decoration: none;
}

.company a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .search-container input {
        width: 60%;
    }

    .search-container button {
        width: 70%;
    }

    .company-list {
        width: 95%;
    }

    .companies {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 480px) {
    nav ul li {
        display: block;
        margin-bottom: 10px;
    }

    .search-container input {
        width: 80%;
    }

    .search-container button {
        width: 80%;
        margin-top: 10px;
    }

    .company-list {
        width: 90%;
        padding: 10px;
    }
}