/* 基础样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

header {
    background: #2c3e50;
    color: #fff;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-info {
    font-size: 14px;
}

.user-info a {
    color: #3498db;
    text-decoration: none;
}

.user-info a:hover {
    text-decoration: underline;
}

.tabs {
    display: flex;
    background: #f1f1f1;
    border-bottom: 1px solid #ddd;
}

.tab-button {
    padding: 15px 25px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #555;
    transition: all 0.3s;
}

.tab-button:hover {
    background: #e9ecef;
}

.tab-button.active {
    background: #fff;
    color: #2c3e50;
    border-bottom: 3px solid #3498db;
}

.tab-content {
    display: none;
    padding: 20px;
}

.tab-content.active {
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

textarea {
    min-height: 100px;
    resize: vertical;
}

.btn {
    background: #3498db;
    color: #fff;
    border: none;
    padding: 12px 25px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
}

.table-container {
    overflow-x: auto;
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
}

tr:hover {
    background-color: #f1f1f1;
}























 

.custom-input {
    display: flex;
    align-items: center;
}

.custom-input input {
    flex: 1;
    padding: 14px 18px;
    border: 2px solid #ddd;
    border-radius: 8px 0 0 8px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.custom-input input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.custom-input span {
    padding: 14px 18px;
    background: #3498db;
    color: white;
    border-radius: 0 8px 8px 0;
    font-weight: 500;
}

.hint {
    margin-top: 8px;
    font-size: 14px;
    color: #7f8c8d;
}

.submit-btn {
    width: 100%;
    padding: 16px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.submit-btn:active {
    transform: translateY(0);
}

.selected-value {
    margin-top: 25px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center;
    font-size: 16px;
    color: #2c3e50;
    display: none;
}

.selected-value strong {
    color: #e74c3c;
}