/* 基础样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fb;
    color: #333;
    padding-top: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    background: linear-gradient(135deg, #4361ee, #3f37c9);
    color: white;
    border-radius: 12px 12px 0 0 !important;
    padding: 15px 20px;
}

.card-header h5 {
    margin-bottom: 0;
}

.card-body {
    padding: 25px;
}

/* 表单样式 */
.form-label {
    font-weight: 600;
    margin-bottom: 8px;
}

.form-control {
    border-radius: 8px;
    padding: 10px 15px;
    border: 1px solid #ddd;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: #4361ee;
    box-shadow: 0 0 0 0.2rem rgba(67, 97, 238, 0.25);
}

.form-text {
    font-size: 0.875rem;
    color: #6c757d;
    margin-top: 5px;
}

/* 按钮样式 */
.btn {
    border-radius: 8px;
    padding: 8px 16px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #4361ee, #3f37c9);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #3f37c9, #2a27a5);
    transform: translateY(-2px);
}

.btn-secondary {
    background: #6c757d;
    border: none;
}

.btn-outline-primary {
    border-color: #4361ee;
    color: #4361ee;
}

.btn-outline-primary:hover {
    background: #4361ee;
    color: white;
}

/* 错误提示 */
.alert {
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

/* 表单布局 */
.d-flex.justify-content-between {
    margin-top: 20px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .card-body {
        padding: 15px;
    }

    .btn {
        padding: 8px 12px;
        font-size: 0.875rem;
    }
}