/**
 * 后台深色风格样式
 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft Yahei", sans-serif;
    background-color: #1a1a1a;
    color: #e0e0e0;
    line-height: 1.6;
}

/* 登录页 */
.login-box {
    width: 400px;
    margin: 100px auto;
    background-color: #2d2d2d;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.login-title {
    text-align: center;
    margin-bottom: 20px;
    font-size: 24px;
    color: #ffffff;
}

.form-item {
    margin-bottom: 15px;
}

.form-item label {
    display: block;
    margin-bottom: 5px;
    color: #cccccc;
}

.form-item input {
    width: 100%;
    padding: 10px;
    background-color: #333;
    border: 1px solid #444;
    color: #e0e0e0;
    border-radius: 4px;
}

.login-btn {
    width: 100%;
    padding: 10px;
    background-color: #007acc;
    border: none;
    color: #ffffff;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

.login-btn:hover {
    background-color: #005f99;
}

/* 后台布局 */
.admin-header {
    background-color: #2d2d2d;
    padding: 15px 20px;
    border-bottom: 1px solid #444;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-nav {
    width: 200px;
    background-color: #2d2d2d;
    height: calc(100vh - 60px);
    position: fixed;
    top: 60px;
    left: 0;
    padding-top: 20px;
}

.admin-nav a {
    display: block;
    padding: 10px 20px;
    color: #e0e0e0;
    text-decoration: none;
    border-left: 3px solid transparent;
}

.admin-nav a:hover, .admin-nav a.active {
    background-color: #333;
    border-left-color: #007acc;
}

.admin-content {
    margin-left: 220px;
    padding: 20px;
}

/* 按钮样式 */
.btn {
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
}

.btn-primary {
    background-color: #007acc;
    color: #ffffff;
}

.btn-danger {
    background-color: #dc3545;
    color: #ffffff;
}

.btn-default {
    background-color: #6c757d;
    color: #ffffff;
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.table th, .table td {
    padding: 12px;
    border: 1px solid #444;
    text-align: left;
}

.table th {
    background-color: #2d2d2d;
    color: #ffffff;
}

.table tr:hover {
    background-color: #333;
}

/* 表单样式 */
.form-box {
    background-color: #2d2d2d;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .admin-nav {
        width: 100%;
        height: auto;
        position: static;
        margin-top: 10px;
    }
    .admin-content {
        margin-left: 0;
    }
    .login-box {
        width: 90%;
    }
}