body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background-color: #fff;
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* 头部 */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #ddd;
    padding-bottom: 15px;
    margin-bottom: 20px;
}
.main-header h1 {
    margin: 0;
    font-size: 1.8em;
    color: #0366d6;
}
.main-header nav a {
    text-decoration: none;
    color: #0366d6;
    margin-left: 15px;
    font-weight: 500;
}
.main-header nav span {
    margin-left: 15px;
}

/* 表单 */
.form-container {
    max-width: 500px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="file"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
button, .btn {
    display: inline-block;
    background-color: #28a745;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 1em;
}
button:hover, .btn:hover {
    background-color: #218838;
}

/* 消息提示 */
.message {
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
    border: 1px solid transparent;
}
.message.success {
    background-color: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}
.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

/* 文件列表和表格 */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}
th {
    background-color: #f8f9fa;
}
td .btn-preview, td .btn-download {
    text-decoration: none;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    margin-right: 5px;
}
.btn-preview { background-color: #007bff; }
.btn-download { background-color: #17a2b8; }
.btn-ban { background-color: #dc3545; }
.btn-unban { background-color: #28a745; }

/* 搜索框 */
.search-container {
    margin-bottom: 20px;
}
.search-container form {
    display: flex;
}
.search-container select, .search-container input {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
.search-container select {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}
.search-container input {
    flex-grow: 1;
    border-left: 0;
    border-radius: 0;
}
.search-container button {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* 代码预览 */
pre[class*="language-"] {
    padding: 1em;
    margin: .5em 0;
    overflow: auto;
    border-radius: 0.3em;
}