* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}
body {
    background: #f5f5f5;
    color: #333;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}
.logo {
    text-align: center;
    padding: 20px 0;
    font-size: 32px;
    font-weight: bold;
    color: #ff6700;
}
.nav {
    background: #ff6700;
    overflow: hidden;
}
.nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}
.nav li {
    padding: 15px 25px;
}
.nav a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
}
.nav a:hover {
    opacity: 0.8;
}
.main {
    background: #fff;
    padding: 30px;
    margin: 20px 0;
    border-radius: 5px;
    min-height: 400px;
}
.footer {
    text-align: center;
    padding: 20px;
    color: #666;
    background: #fff;
    margin-top: 20px;
}
.form-box {
    max-width: 400px;
    margin: 0 auto;
}
.form-box input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
}
.form-box button {
    width: 100%;
    padding: 12px;
    background: #ff6700;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
.table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
.table th,.table td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: center;
}
.table th {
    background: #ff6700;
    color: #fff;
}
img {
    max-width: 300px;
    margin: 10px;
}